/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.collapse{visibility:collapse}.visible{visibility:visible}.relative{position:relative}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.table{display:table}}:root{--ink:#18221f;--paper:#f5f2eb;--cream:#ece7dc;--acid:#d8ff59;--green:#1e4335;--line:#18221f29}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Noto Sans Hebrew,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit}.math-inline{vertical-align:-.08em;white-space:nowrap;max-width:100%;color:inherit;direction:ltr;unicode-bidi:isolate;margin-inline:.14em;display:inline-block}.math-segment{unicode-bidi:isolate;display:inline}.math-inline .katex{font-size:1.08em;line-height:1.35}.math-display{text-align:center;scrollbar-width:thin;direction:ltr;unicode-bidi:isolate;width:100%;max-width:100%;display:block;overflow:auto hidden}.math-display .katex-display{margin:.2em 0}.math-display .katex{font-size:1.12em}.diagnostic-console>h3 .katex,.session-question-card>h3 .katex,.arcade-arena>h3 .katex,.quiz-card>h3 .katex,.math-lab-game>h3 .katex{color:inherit;font-size:1.08em}.diagnostic-options b,.session-options b,.arena-options b,.quiz-options b,.lab-game-options b{min-width:0;font-weight:700;line-height:1.65}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.topbar{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#f5f2ebeb;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:72px;padding:12px clamp(22px,4vw,64px);display:grid;position:sticky;top:0}.brand{color:var(--ink);justify-self:start;align-items:center;display:flex}.brand-word{letter-spacing:.12em;align-items:center;gap:8px;font:900 19px/1 Arial,sans-serif;display:inline-flex}.brand-word b{color:#315e4e;font:700 1.05em/1 Georgia,serif}.topbar nav{gap:28px;font-size:14px;display:flex}.topbar nav a{opacity:.68;transition:opacity .2s}.topbar nav a:hover{opacity:1}.mini-cta{justify-self:end;align-items:center;gap:12px;font-size:14px;font-weight:700;display:flex}.mini-cta span{border:1px solid var(--ink);border-radius:50%;place-items:center;width:28px;height:28px;display:grid}.score-pill{background:var(--ink);color:#fff;border-radius:999px;justify-self:end;align-items:center;gap:6px;padding:9px 13px;font-size:11px;display:flex}.score-pill span{color:var(--acid)}.score-pill b{font-variant-numeric:tabular-nums;font-size:14px}.topbar-actions{justify-self:end;align-items:center;gap:8px;display:flex}.course-picker{position:relative}.course-picker summary{border:1px solid var(--line);color:#183027;cursor:pointer;background:#d9eadf;border-radius:999px;justify-content:space-between;align-items:center;gap:8px;min-width:118px;padding:9px 12px;font-size:10px;font-weight:900;list-style:none;display:flex}.course-picker summary::-webkit-details-marker{display:none}.course-picker[open] summary{box-shadow:0 8px 20px #18221f1a}.course-picker>div{z-index:30;border:1px solid var(--line);background:#fbfaf6;border-radius:10px;gap:5px;min-width:210px;padding:7px;display:grid;position:absolute;top:calc(100% + 9px);left:0;box-shadow:0 18px 45px #18221f29}.course-picker>div a{border-radius:7px;justify-content:space-between;align-items:center;gap:18px;padding:11px 12px;font-size:11px;font-weight:800;display:flex}.course-picker>div a:hover,.course-picker>div a.active{background:var(--ink);color:#fff}.course-picker small{color:#658073;font-size:8px}.course-picker>div a.active small{color:var(--acid)}.account-pill{border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fbfaf6;border-radius:999px;align-items:center;gap:7px;padding:5px 10px 5px 6px;display:flex}.account-pill>span{color:#315e4e;background:#e4dded;border-radius:50%;place-items:center;width:25px;height:25px;font-size:10px;font-weight:900;display:grid}.account-pill.signed-in>span{background:var(--acid)}.account-pill b{font-size:9px}.account-overlay{z-index:80;-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);background:#101916a8;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.account-panel{width:min(460px,100%);color:var(--ink);text-align:center;background:#f7f4ec;border-radius:15px;padding:38px;position:relative;box-shadow:0 28px 90px #00000047}.account-close{cursor:pointer;background:#e8e4da;border:0;border-radius:50%;width:34px;height:34px;font-size:22px;position:absolute;top:13px;left:13px}.account-avatar{background:var(--ink);width:72px;height:72px;color:var(--acid);border-radius:50%;place-items:center;margin:0 auto 16px;font-size:27px;font-weight:900;display:grid}.account-avatar.guest{font:700 30px Georgia,serif}.account-kicker{color:#315e4e;letter-spacing:.1em;font-size:9px;font-weight:900}.account-panel h2{letter-spacing:-.045em;margin:8px 0 10px;font-size:34px;line-height:1.03}.account-panel>p{color:#66706c;margin:0 auto 22px;font-size:12px;line-height:1.65}.account-panel>ul{text-align:right;gap:8px;margin:0 0 22px;padding:0;list-style:none;display:grid}.account-panel>ul li{background:#ece9e1;border-radius:7px;align-items:center;gap:9px;padding:10px 12px;font-size:11px;display:flex}.account-panel>ul span{color:#315e4e;font-weight:900}.account-stats{grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:15px;display:grid}.account-stats>div{border:1px solid var(--line);background:#fff;border-radius:7px;gap:5px;padding:13px 8px;display:grid}.account-stats span{color:#717873;font-size:8px}.account-stats b{color:#315e4e;font-size:19px}.cloud-status{color:#315e4e;background:#e3ecd9;border-radius:7px;justify-content:center;align-items:center;gap:7px;margin-bottom:12px;padding:10px;font-size:9px;font-weight:800;display:flex}.cloud-status.saving{color:#7a6b26;background:#ece8d4}.cloud-status.error{color:#9d504d;background:#f0d9d6}.cloud-status span{font-size:7px}.account-panel>small{color:#838883;margin-top:12px;font-size:8px;display:block}.account-signin,.account-signout{background:var(--ink);color:#fff;border-radius:6px;justify-content:center;align-items:center;gap:25px;margin-top:16px;padding:14px 17px;font-size:11px;font-weight:900;display:flex}.account-signin{box-shadow:5px 5px 0 var(--acid)}.account-signout{border:1px solid var(--line);color:#666e69;box-shadow:none;background:0 0}.reward-toast{z-index:50;color:#fff;background:#18221f;border:1px solid #d8ff59bf;border-radius:10px;grid-template-columns:42px 1fr;align-items:center;gap:13px;width:min(380px,100% - 32px);padding:15px 17px;animation:.32s cubic-bezier(.2,.85,.3,1.2) reward-pop;display:grid;position:fixed;top:88px;left:clamp(16px,4vw,54px);box-shadow:0 18px 55px #18221f47}.reward-toast>span{background:var(--acid);width:42px;height:42px;color:var(--ink);border-radius:50%;place-items:center;font-size:20px;display:grid}.reward-toast b{color:var(--acid);font-size:16px}.reward-toast p{color:#ffffffb8;margin:4px 0 0;font-size:10px;line-height:1.45}@keyframes reward-pop{0%{opacity:0;transform:translateY(-12px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}.page-shell{width:min(1180px,100% - 40px);margin:0 auto}.dashboard{grid-template-columns:1.45fr .55fr;align-items:center;gap:clamp(40px,8vw,110px);min-height:590px;padding:84px 0 66px;display:grid}.eyebrow,.section-kicker{letter-spacing:.08em;text-transform:uppercase;font-size:12px;font-weight:800}.eyebrow{border:1px solid var(--line);border-radius:999px;align-items:center;gap:8px;padding:9px 12px;display:inline-flex}.eyebrow span{color:#f07874;font-size:9px}.dashboard h1{letter-spacing:-.065em;max-width:780px;margin:24px 0 22px;font-size:clamp(52px,7.2vw,94px);font-weight:800;line-height:.94}.dashboard h1 em{color:#315e4e;font-family:Georgia,Times New Roman,serif;font-weight:400}.dashboard-copy>p{color:#18221fad;max-width:620px;margin:0;font-size:18px;line-height:1.75}.personal-origin{border-right:4px solid var(--acid);background:#e8eddf;border-radius:7px;grid-template-columns:auto 1fr;align-items:center;gap:12px 16px;max-width:620px;margin-top:20px;padding:15px 17px;display:grid}.personal-origin b{color:#315e4e;white-space:nowrap;font-size:12px}.personal-origin span{color:#59635f;font-size:12px;line-height:1.55}.hero-actions{align-items:center;gap:26px;margin-top:34px;display:flex}.primary-button{background:var(--ink);color:#fff;box-shadow:7px 7px 0 var(--acid);border-radius:6px;align-items:center;gap:34px;padding:17px 22px;font-weight:700;transition:transform .2s,box-shadow .2s;display:inline-flex}.primary-button:hover{box-shadow:4px 4px 0 var(--acid);transform:translate(3px,3px)}.text-button{border-bottom:1px solid var(--ink);padding-bottom:3px;font-weight:700}.progress-card{border:1px solid var(--line);background:#fbfaf6;border-radius:8px;align-self:end;margin-bottom:18px;padding:24px;box-shadow:12px 12px #dde3d4}.progress-topline{justify-content:space-between;font-size:13px;display:flex}.progress-topline b{color:#315e4e}.progress-track{background:#deddd6;border-radius:99px;height:8px;margin:15px 0 28px;overflow:hidden}.progress-track span{border-radius:inherit;background:#315e4e;height:100%;transition:width .4s;display:block}.progress-big{letter-spacing:-.08em;font-size:74px;font-weight:800;line-height:.9}.progress-big span{color:#7a7f79;letter-spacing:-.02em;font-size:21px}.progress-card p{color:#666c67;margin:12px 0 22px;font-size:14px}.profile-level{border-top:1px solid var(--line);justify-content:space-between;padding-top:15px;font-size:11px;display:flex}.profile-level span{color:#66706b}.profile-level b{color:#315e4e}.level-track{background:#e1dfd7;border-radius:99px;height:5px;margin:10px 0 9px;overflow:hidden}.level-track span{border-radius:inherit;background:var(--acid);border-right:1px solid #abc23a;height:100%;transition:width .35s;display:block}.progress-note{border-top:1px solid var(--line);color:#838681;padding-top:14px;font-size:11px}.focus-strip{color:#fff;background:#203e33;border-radius:10px;grid-template-columns:130px 1fr 1.35fr 48px;align-items:center;gap:28px;padding:30px 34px;display:grid;box-shadow:0 18px 60px #1e433529}.focus-number{letter-spacing:-.055em;color:var(--acid);font-variant-numeric:tabular-nums;direction:ltr;font-size:45px;font-weight:800}.focus-number span{letter-spacing:0;margin-right:5px;font-size:13px}.focus-main{border-right:1px solid #ffffff2e;padding-right:28px}.focus-main h2{margin:6px 0 5px;font-size:25px}.focus-main p{color:#ffffffa8;margin:0;font-size:13px}.focus-resource{color:var(--acid);border-bottom:1px solid #d8ff5973;margin-top:9px;font-size:11px;font-weight:800;display:inline-block}.focus-steps{grid-template-columns:repeat(3,1fr);gap:18px;margin:0;padding:0;list-style:none;display:grid}.focus-steps li{flex-direction:column;gap:5px;display:flex}.focus-steps b{color:var(--acid);font-size:13px}.focus-steps span{color:#ffffffb3;font-size:12px}.timer-controls{flex-direction:column;align-items:center;gap:7px;display:flex}.round-link{background:var(--acid);width:45px;height:45px;color:var(--ink);cursor:pointer;border:0;border-radius:50%;place-items:center;font-size:15px;display:grid}.timer-reset{color:#ffffff8f;cursor:pointer;background:0 0;border:0;font-size:9px}.timer-running{box-shadow:0 18px 60px #1e433529,inset 0 0 0 1px #d8ff5973}.mastery-section{background:linear-gradient(145deg,#0e1526f5,#0c1d27f5);border:1px solid #72e8ff29;border-radius:18px;margin:34px 0 18px;padding:clamp(28px,5vw,58px);box-shadow:0 28px 90px #0000005c,0 0 55px #72e8ff0f}.mastery-heading{grid-template-columns:1.15fr .85fr;align-items:end;gap:48px;margin-bottom:28px;display:grid}.mastery-heading .section-kicker{color:#72e8ff}.mastery-heading h2{color:#f7f9ff;letter-spacing:-.055em;margin:10px 0 0;font-size:clamp(38px,5vw,64px);line-height:.98}.mastery-heading h2 em{color:#b7ff4a;font-family:Georgia,serif;font-weight:400}.mastery-heading>p{color:#e1e8f6a6;margin:0;font-size:13px;line-height:1.8}.mastery-layout{grid-template-columns:1.15fr .85fr;gap:12px;display:grid}.diagnostic-console,.mastery-dashboard{background:#0b1424;border:1px solid #ffffff1a;border-radius:12px;min-height:520px;padding:clamp(20px,3vw,30px)}.diagnostic-top{color:#72e8ff;justify-content:space-between;gap:18px;font-size:10px;font-weight:900;display:flex}.diagnostic-top b{color:#e1e8f699;font-variant-numeric:tabular-nums}.diagnostic-track{background:#263047;border-radius:99px;height:5px;margin:12px 0 28px;overflow:hidden}.diagnostic-track span{border-radius:inherit;background:linear-gradient(90deg,#72e8ff,#b7ff4a);height:100%;display:block}.diagnostic-console>h3{color:#f7f9ff;letter-spacing:-.035em;max-width:720px;margin:0 0 22px;font-size:clamp(25px,3vw,37px);line-height:1.2}.confidence-check{background:#72e8ff0b;border:1px solid #72e8ff24;border-radius:8px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:13px;padding:12px 13px;display:flex}.confidence-check>span{color:#e2e9f7ad;font-size:10px}.confidence-check>div{gap:5px;display:flex}.confidence-check button{color:#dfe7f5;cursor:pointer;background:#121d31;border:1px solid #ffffff24;border-radius:999px;padding:8px 10px;font-size:9px;font-weight:800}.confidence-check button.active{color:#071018;background:#72e8ff;border-color:#72e8ff}.diagnostic-options{grid-template-columns:1fr 1fr;gap:8px;display:grid}.diagnostic-options button{color:#f2f6ff;text-align:right;cursor:pointer;background:#121d30;border:1px solid #ffffff1f;border-radius:8px;align-items:center;gap:11px;min-height:63px;padding:12px 13px;display:flex}.diagnostic-options button:disabled{cursor:default;opacity:.54}.diagnostic-options button.correct{opacity:1;background:#5ae2aa29;border-color:#5ae2aa}.diagnostic-options button.wrong{opacity:1;background:#ff667d24;border-color:#ff667d}.diagnostic-options button>span{direction:ltr;border:1px solid #fff3;border-radius:50%;flex:none;place-items:center;width:29px;height:29px;font-size:9px;display:grid}.diagnostic-options button b{font-size:11px}.confidence-nudge{color:#e1e8f67a;margin-top:12px;font-size:9px;display:block}.diagnostic-feedback{background:#5ae2aa1c;border-radius:8px;justify-content:space-between;align-items:center;gap:18px;margin-top:12px;padding:14px;display:flex}.diagnostic-feedback.wrong{background:#ff667d1a}.diagnostic-feedback b{color:#b7ff4a;font-size:11px}.diagnostic-feedback.wrong b{color:#ff9cab}.diagnostic-feedback p{color:#e2e9f7ad;margin:5px 0;font-size:10px;line-height:1.5}.diagnostic-feedback small{color:#e2e9f76b;font-size:8px}.diagnostic-feedback>button,.diagnostic-actions button{color:#07100c;cursor:pointer;background:#b7ff4a;border:0;border-radius:6px;flex:none;padding:11px 13px;font-size:9px;font-weight:900}.diagnostic-finish-mark{color:#b7ff4a;font:700 54px/1 Georgia,serif}.diagnostic-label{color:#72e8ff;letter-spacing:.08em;text-transform:uppercase;margin-top:8px;font-size:9px;font-weight:900;display:block}.diagnostic-console .diagnostic-label+h3{margin:8px 0 12px}.diagnostic-console>p{color:#e1e8f69e;max-width:600px;font-size:12px;line-height:1.7}.diagnostic-actions{gap:8px;margin-top:22px;display:flex}.diagnostic-actions button.ghost{color:#eef3ff;background:0 0;border:1px solid #ffffff2e}.mastery-dashboard{background:#111a2d}.mastery-stats{grid-template-columns:repeat(3,1fr);gap:6px;margin-bottom:20px;display:grid}.mastery-stats>div{text-align:center;background:#ffffff09;border:1px solid #ffffff17;border-radius:8px;gap:5px;padding:13px 8px;display:grid}.mastery-stats b{color:#b7ff4a;font-size:22px}.mastery-stats span{color:#e1e8f685;font-size:8px}.mastery-list{gap:12px;display:grid}.mastery-list>div>div:first-child{justify-content:space-between;gap:15px;font-size:9px;display:flex}.mastery-list>div>div:first-child b{color:#eef3ff}.mastery-list>div>div:first-child span{color:#72e8ff}.mastery-list>div.illusion>div:first-child span{color:#ff9cab}.mastery-bar{background:#263047;border-radius:99px;height:5px;margin:7px 0 5px;overflow:hidden}.mastery-bar span{border-radius:inherit;background:linear-gradient(90deg,#6a5cff,#72e8ff,#b7ff4a);height:100%;display:block}.mastery-list small{color:#e1e8f66b;font-size:8px}.mastery-dashboard>button{color:#07100c;cursor:pointer;background:#b7ff4a;border:0;border-radius:7px;justify-content:space-between;gap:15px;width:100%;margin-top:22px;padding:13px 14px;font-size:10px;font-weight:900;display:flex}.mastery-dashboard>p{color:#e1e8f66b;text-align:center;margin:10px 0 0;font-size:8px}.learning-protocol{background:#ffffff09;border:1px solid #ffffff17;border-radius:12px;grid-template-columns:.62fr 1.38fr;gap:26px;margin-top:12px;padding:24px;display:grid}.protocol-copy>span{color:#72e8ff;letter-spacing:.08em;font-size:9px;font-weight:900}.protocol-copy h3{letter-spacing:-.035em;margin:8px 0;font-size:25px}.protocol-copy p{color:#e1e8f694;margin:0;font-size:10px;line-height:1.65}.protocol-steps{grid-template-columns:repeat(5,1fr);gap:7px;display:grid}.protocol-steps article{background:#101a2c;border:1px solid #ffffff17;border-radius:8px;min-height:165px;padding:14px;position:relative}.protocol-steps article>span{color:#b7ff4a;font-size:9px;font-weight:900}.protocol-steps small{color:#72e8ff;font-size:8px;position:absolute;top:14px;left:14px}.protocol-steps h4{margin:28px 0 7px;font-size:13px}.protocol-steps p{color:#e1e8f687;margin:0;font-size:8px;line-height:1.55}.syllabus-map{background:#0d1627;border:1px solid #ffffff1a;border-radius:10px;margin-top:12px;overflow:hidden}.syllabus-map summary{cursor:pointer;justify-content:space-between;align-items:center;padding:17px 19px;list-style:none;display:flex}.syllabus-map summary::-webkit-details-marker{display:none}.syllabus-map summary>div{gap:3px;display:grid}.syllabus-map summary span{color:#72e8ff;font-size:8px;font-weight:900}.syllabus-map summary b{font-size:14px}.syllabus-map summary i{color:#b7ff4a;font-size:9px;font-style:normal;font-weight:900}.syllabus-map>div{grid-template-columns:repeat(4,1fr);gap:6px;padding:0 12px 12px;display:grid}.syllabus-map article{background:#141f33;border-radius:7px;gap:5px;padding:11px;display:grid}.syllabus-map article b{color:#b7ff4a;font-size:9px}.syllabus-map article span{color:#ebf0faad;font-size:8px;line-height:1.4}.research-strip{background:#72e8ff0e;border-right:3px solid #72e8ff;border-radius:8px;grid-template-columns:auto 1fr;gap:8px 20px;margin-top:12px;padding:18px 20px;display:grid}.research-strip>b{color:#72e8ff;font-size:10px}.research-strip>p{color:#e1e8f69e;margin:0;font-size:9px;line-height:1.65}.research-strip>div{flex-wrap:wrap;grid-column:2;gap:6px;display:flex}.research-strip a{color:#b7ff4a;border:1px solid #ffffff1c;border-radius:5px;padding:6px 8px;font-size:8px;font-weight:800}.session-studio{background:var(--ink);color:#fff;border-radius:14px;margin-top:18px;padding:clamp(24px,4vw,48px);box-shadow:0 22px 70px #18221f2e}.session-studio-head{border-bottom:1px solid #ffffff21;justify-content:space-between;align-items:end;gap:36px;padding-bottom:28px;display:flex}.session-studio-head h2{letter-spacing:-.05em;margin:8px 0 7px;font-size:clamp(35px,4.5vw,60px);line-height:.98}.session-studio-head p{color:#ffffff94;max-width:610px;margin:0;font-size:12px;line-height:1.6}.drive-sync-banner{background:#d8ff5912;border:1px solid #d8ff593d;border-radius:9px;justify-content:space-between;align-items:center;gap:20px;margin-top:16px;padding:13px 15px;display:flex}.drive-sync-banner>div{align-items:center;gap:11px;display:flex}.drive-sync-banner>div>span{background:var(--acid);width:29px;height:29px;color:var(--ink);border-radius:50%;flex:none;place-items:center;font-size:12px;font-weight:900;display:grid}.drive-sync-banner p{gap:2px;margin:0;display:grid}.drive-sync-banner b{color:#fff;font-size:10px}.drive-sync-banner small{color:#ffffff91;font-size:9px}.drive-sync-banner nav{flex-wrap:wrap;justify-content:end;gap:7px;display:flex}.drive-sync-banner a{color:var(--acid);border:1px solid #ffffff26;border-radius:5px;padding:7px 9px;font-size:8px;font-weight:900}.session-timer{flex:none;grid-template-columns:auto auto;align-items:center;gap:6px;display:grid}.session-timer>span{color:var(--acid);letter-spacing:-.05em;font-variant-numeric:tabular-nums;direction:ltr;grid-row:1/3;margin-left:12px;font-size:32px;font-weight:900}.session-timer button{border:1px solid var(--acid);background:var(--acid);min-width:82px;color:var(--ink);cursor:pointer;border-radius:5px;padding:9px 12px;font-size:9px;font-weight:900}.session-timer .timer-reset{color:#ffffff8c;background:0 0;border-color:#ffffff38}.session-grid{grid-template-columns:.82fr 1.18fr;gap:12px;margin-top:12px;display:grid}.session-explainer,.session-game{background:#ffffff0e;border:1px solid #ffffff21;border-radius:11px}.session-explainer{flex-direction:column;padding:26px;display:flex}.session-step{color:var(--acid);letter-spacing:.09em;text-transform:uppercase;font-size:9px;font-weight:900}.session-explainer>h3,.session-game-top h3{margin:7px 0 12px;font-size:22px}.session-explainer>p{color:#ffffffb8;margin:0;font-size:13px;line-height:1.78}.session-intuition{border-right:3px solid var(--acid);background:#d8ff5914;border-radius:6px;gap:6px;margin:19px 0;padding:14px 15px;display:grid}.session-intuition b{color:var(--acid);font-size:10px}.session-intuition span{color:#ffffffb3;font-size:11px;line-height:1.6}.why-it-matters{background:#5ae2ff12;border:1px solid #5ae2ff38;border-radius:7px;gap:5px;margin:-6px 0 14px;padding:12px 13px;display:grid}.why-it-matters b{color:#72e8ff;font-size:9px}.why-it-matters span{color:#ffffffb3;font-size:9px;line-height:1.55}.zero-lesson-path{gap:7px;margin:0 0 13px;display:grid}.zero-lesson-path details{background:#ffffff0b;border:1px solid #ffffff21;border-radius:7px;overflow:hidden}.zero-lesson-path summary{cursor:pointer;grid-template-columns:24px 1fr auto;align-items:center;gap:9px;padding:10px 11px;list-style:none;display:grid}.zero-lesson-path summary::-webkit-details-marker{display:none}.zero-lesson-path summary>span{width:24px;height:24px;color:var(--acid);background:#d8ff5921;border-radius:50%;place-items:center;font-size:8px;font-weight:900;display:grid}.zero-lesson-path summary>b{color:#fff;font-size:10px}.zero-lesson-path summary>i{color:#ffffff73;font-size:10px;font-style:normal;transition:transform .2s}.zero-lesson-path details[open] summary>i{transform:rotate(180deg)}.zero-lesson-path dl{gap:0;margin:0;padding:0 11px 11px;display:grid}.zero-lesson-path dl>div{border-top:1px solid #ffffff17;grid-template-columns:92px 1fr;gap:10px;padding:8px 0;display:grid}.zero-lesson-path dt{color:var(--acid);font-size:9px;font-weight:900}.zero-lesson-path dd{color:#ffffffab;margin:0;font-size:9px;line-height:1.45}.zero-lesson-path ol{gap:8px;margin:0;padding:2px 11px 12px;list-style:none;display:grid}.zero-lesson-path ol li{grid-template-columns:22px 1fr;align-items:start;gap:8px;display:grid}.zero-lesson-path ol li>b{background:var(--acid);width:22px;height:22px;color:var(--ink);border-radius:50%;place-items:center;font-size:8px;display:grid}.zero-lesson-path ol p,.zero-lesson-path details>p{color:#ffffffb3;margin:0;font-size:9px;line-height:1.55}.zero-lesson-path details>ul{gap:7px;margin:0;padding:0 11px 12px;list-style:none;display:grid}.zero-lesson-path details>ul li{grid-template-columns:20px 1fr;align-items:start;gap:8px;display:grid}.zero-lesson-path details>ul li>span{color:#72e8ff;background:#5ae2ff1f;border-radius:50%;place-items:center;width:20px;height:20px;font-size:8px;display:grid}.zero-lesson-path details>ul p{color:#ffffffad;margin:1px 0 0;font-size:9px;line-height:1.45}.zero-lesson-path details>p{padding:0 11px 9px}.micro-answer{border-right:3px solid var(--acid);background:#d8ff5914;gap:4px;margin:0 11px 11px;padding:9px 10px;display:grid}.micro-answer b{color:var(--acid);font-size:8px}.micro-answer span{color:#ffffffb8;font-size:9px;line-height:1.5}.common-mistake{background:#f078741a;border-radius:6px;grid-template-columns:auto 1fr;align-items:start;gap:9px;margin:0 0 15px;padding:10px 11px;display:grid}.common-mistake b{color:#ffaaa6;white-space:nowrap;font-size:9px}.common-mistake span{color:#ffffffab;font-size:9px;line-height:1.5}.session-explainer>ul{gap:8px;margin:0 0 22px;padding:0;list-style:none;display:grid}.session-explainer>ul li{color:#ffffffad;align-items:center;gap:8px;font-size:10px;display:flex}.session-explainer>ul span{width:18px;height:18px;color:var(--acid);background:#d8ff5924;border-radius:50%;place-items:center;font-size:8px;display:grid}.session-explainer>a{color:var(--ink);background:#fff;border-radius:7px;gap:4px;margin-top:auto;padding:14px 42px 14px 15px;display:grid;position:relative}.session-explainer>a b{font-size:10px}.session-explainer>a span{color:#68726d;font-size:9px;line-height:1.4}.session-explainer>a i{color:#315e4e;font-style:normal;font-weight:900;position:absolute;top:50%;right:15px;transform:translateY(-50%)}.session-game{color:var(--ink);background:#f4f1e9;padding:22px}.session-game-top{justify-content:space-between;align-items:end;gap:20px;display:flex}.session-game-top .session-step{color:#315e4e}.session-game-top>b{color:#65706a;font-size:9px}.session-levels{grid-template-columns:repeat(3,1fr);gap:7px;margin:13px 0 12px;display:grid}.session-levels button{text-align:right;cursor:pointer;background:#ffffffad;border:1px solid #18221f26;border-radius:7px;gap:4px;min-height:77px;padding:11px 12px;display:grid}.session-levels button b{font-size:12px}.session-levels button span{color:#6b736f;font-size:8px}.session-levels button small{color:#315e4e;font-size:8px;font-weight:900}.session-levels button.active{border-color:var(--ink);background:var(--ink);color:#fff;box-shadow:inset 0 -3px 0 var(--acid)}.session-question-card{background:#fff;border-radius:9px;min-height:410px;padding:clamp(18px,3vw,28px)}.session-question-meta{color:#68716d;justify-content:space-between;gap:14px;font-size:8px;display:flex}.session-question-meta span{color:#315e4e;font-weight:900}.session-progress{background:#e5e4df;border-radius:99px;height:5px;margin:12px 0 25px;overflow:hidden}.session-progress span{border-radius:inherit;background:#315e4e;height:100%;transition:width .25s;display:block}.session-question-card>h3{letter-spacing:-.035em;min-height:62px;margin:0 0 22px;font-size:clamp(24px,3vw,36px);line-height:1.15}.session-options{grid-template-columns:1fr 1fr;gap:8px;display:grid}.session-options button{text-align:right;cursor:pointer;background:#f7f5ef;border:1px solid #18221f29;border-radius:7px;align-items:center;gap:11px;min-height:58px;padding:11px 13px;display:flex}.session-options button>span{direction:ltr;border:1px solid #18221f2e;border-radius:50%;flex:none;place-items:center;width:28px;height:28px;font-size:9px;display:grid}.session-options button b{font-size:11px}.session-options button.correct{background:#dcebdc;border-color:#315e4e}.session-options button.wrong{background:#f0d8d6;border-color:#a9514f}.session-options button.correct>span{color:#fff;background:#315e4e}.session-options button.wrong>span{color:#fff;background:#a9514f}.session-feedback{background:#e7eee4;border-radius:7px;justify-content:space-between;align-items:center;gap:20px;margin-top:10px;padding:13px 14px;display:flex}.session-feedback b{font-size:10px}.session-feedback p{color:#626c67;margin:4px 0 0;font-size:9px;line-height:1.45}.session-feedback>button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;flex:none;padding:10px 12px;font-size:9px;font-weight:900}.chatgpt-help-button{color:#183027;background:#eef5ed;border:1px solid #315e4e;border-radius:7px;justify-content:space-between;align-items:center;gap:12px;margin-top:10px;padding:12px 14px;font-size:10px;font-weight:900;display:flex}.chatgpt-help-button span{font-size:14px}.solution-tools{border-top:1px solid #e5e2da;margin-top:12px;padding-top:12px}.solution-tools>span{color:#68716c;margin-bottom:8px;font-size:8px;font-weight:800;display:block}.solution-tools>div{flex-wrap:wrap;gap:6px;display:flex}.solution-tools button{color:#4f5b56;cursor:pointer;background:#f5f2eb;border:1px solid #18221f2b;border-radius:99px;padding:8px 10px;font-size:8px;font-weight:900}.solution-tools button.active{border-color:var(--ink);background:var(--ink);color:var(--acid)}.solution-drawer{background:#ece8df;border-radius:8px;margin-top:9px;padding:15px 17px;animation:.2s ease-out reward-pop}.solution-drawer>span{color:#315e4e;font-size:9px;font-weight:900}.solution-drawer>p{color:#56615c;margin:7px 0 0;font-size:10px;line-height:1.65}.solution-drawer>ol{gap:8px;margin:10px 0 0;padding:0;list-style:none;display:grid}.solution-drawer>ol li{grid-template-columns:25px 1fr;align-items:center;gap:9px;display:grid}.solution-drawer>ol li>b{background:var(--ink);width:25px;height:25px;color:var(--acid);border-radius:50%;place-items:center;font-size:9px;display:grid}.solution-drawer>ol p{color:#59635e;margin:0;font-size:10px;line-height:1.5}.full-answer{color:#59635e;background:#fff;border-right:3px solid #315e4e;margin-top:10px;padding:10px 12px;font-size:10px}.full-answer b{color:var(--ink)}.concept-visual{gap:8px;display:grid}.concept-visual>b{color:#315e4e;font-size:10px}.concept-visual>p{color:#5c6661;margin:0;font-size:9px;line-height:1.55}.concept-visual svg{background:#fff;border-radius:6px;width:100%;height:auto;max-height:165px}.concept-visual svg line{stroke:#73807a;stroke-width:2px}.concept-visual svg text{fill:#52605a;font:12px Arial,sans-serif}.concept-visual svg .visual-accent{stroke:#315e4e;stroke-width:5px}.concept-visual svg .visual-open{fill:#fff;stroke:#315e4e;stroke-width:4px}.concept-visual svg .visual-curve{fill:none;stroke:#315e4e;stroke-width:4px}.concept-visual svg .visual-dashed{stroke:#a2aaa5;stroke-dasharray:7 6}.concept-visual svg .visual-point{fill:var(--acid);stroke:#315e4e;stroke-width:3px}.concept-visual table{border-collapse:collapse;text-align:center;background:#fff;border-radius:6px;width:100%;font-size:9px;overflow:hidden}.concept-visual th,.concept-visual td{border:1px solid #e1ded5;padding:9px 6px}.concept-visual th{color:#315e4e}.visual-highlight{background:var(--acid);font-weight:900}.sum-bars{background:#fff;border-radius:6px;align-items:flex-end;gap:8px;height:125px;padding:18px 18px 10px;display:flex;position:relative;overflow:hidden}.sum-bars span{color:#fff;background:#315e4e;border-radius:4px 4px 0 0;flex:1;justify-content:center;align-items:flex-start;min-height:24px;padding-top:5px;font-size:8px;display:flex}.sum-bars i{color:#687236;text-align:left;border-top:2px dashed #b1bd56;font-size:8px;font-style:normal;position:absolute;top:18px;left:12px;right:12px}.session-complete{text-align:center;background:#fff;border-radius:9px;flex-direction:column;justify-content:center;align-items:center;min-height:410px;padding:30px;display:flex}.session-complete>span{color:#315e4e;font:700 44px/1 Georgia,serif}.session-complete>small{color:#65706a;margin-top:8px;font-weight:900}.session-complete>h3{letter-spacing:-.07em;margin:5px 0;font-size:68px}.session-complete>p{color:#69716d;max-width:420px;margin:0 0 20px;font-size:11px;line-height:1.55}.session-complete>div{gap:8px;display:flex}.session-complete button{border:1px solid var(--ink);cursor:pointer;background:0 0;border-radius:5px;padding:11px 14px;font-size:10px;font-weight:900}.session-complete button.next-level{background:var(--ink);color:#fff}.session-complete a{background:var(--ink);color:#fff;border-radius:5px;padding:11px 14px;font-size:10px;font-weight:900}.course-horizon{border:1px solid var(--line);background:#fbfaf6;border-radius:11px;grid-template-columns:.88fr 1.12fr;align-items:center;gap:48px;margin:18px 0 0;padding:34px 38px;display:grid}.course-horizon-copy>span{color:#315e4e;letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:900}.course-horizon h2{letter-spacing:-.045em;margin:8px 0 10px;font-size:clamp(27px,3.3vw,43px);line-height:1.03}.course-horizon h2 em{color:#315e4e;font-family:Georgia,serif;font-weight:400}.course-horizon p{color:#68706c;margin:0;font-size:12px;line-height:1.65}.course-chips{grid-template-columns:repeat(2,1fr);gap:8px;display:grid}.course-chips b,.course-chips>a{color:#6f7671;background:#f1eee7;border:1px dashed #18221f38;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;min-height:67px;padding:14px 16px;font-size:12px;font-weight:800;display:flex}.course-chips>a{color:#183027;background:#d9eadf;border-style:solid;border-color:#315e4e;transition:transform .2s,box-shadow .2s}.course-chips>a:hover{transform:translateY(-2px);box-shadow:0 10px 24px #18221f17}.course-chips b.live,.course-chips>a.live{border-style:solid;border-color:var(--ink);background:var(--ink);color:#fff;grid-column:1/-1}.course-chips small{color:#707772;background:#18221f12;border-radius:99px;padding:5px 7px;font-size:8px}.course-chips .live small{background:var(--acid);color:var(--ink)}.visual-linear-lab{color:var(--ink);background:#f0ede5;border-radius:18px;margin:76px 0 18px;padding:clamp(24px,4vw,48px);box-shadow:0 24px 70px #18221f1f}.visual-lab-intro{grid-template-columns:1.15fr .85fr;align-items:end;gap:50px;margin-bottom:30px;display:grid}.visual-lab-intro span{color:#315e4e;letter-spacing:.13em;font-size:10px;font-weight:900}.visual-lab-intro h2{letter-spacing:-.055em;margin:9px 0 0;font-size:clamp(36px,5vw,66px);line-height:.98}.visual-lab-intro h2 em{color:#315e4e;font-family:Georgia,serif;font-weight:400}.visual-lab-intro p{color:#68716c;margin:0;font-size:13px;line-height:1.75}.concept-lesson-tabs{grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:10px;display:grid}.concept-lesson-tabs button{min-height:112px;color:var(--ink);text-align:right;cursor:pointer;background:#fbfaf6;border:1px solid #18221f24;border-radius:10px;grid-template-columns:28px 1fr;align-content:center;gap:5px 9px;padding:15px;display:grid}.concept-lesson-tabs button>span{color:#65706a;background:#e4e1d8;border-radius:50%;grid-row:1/3;place-items:center;width:28px;height:28px;font-size:9px;font-weight:900;display:grid}.concept-lesson-tabs b{font-size:11px}.concept-lesson-tabs small{color:#79807b;font-size:8px;line-height:1.45}.concept-lesson-tabs button.active{color:#fff;box-shadow:inset 0 -4px 0 var(--acid);background:#203e33;border-color:#203e33}.concept-lesson-tabs button.active small{color:#fff9}.concept-lesson-tabs button.active>span,.concept-lesson-tabs button.done>span{background:var(--acid);color:var(--ink)}.concept-workbench{background:#fbfaf6;border:1px solid #18221f26;border-radius:15px;grid-template-columns:.88fr 1.12fr;min-height:590px;display:grid;overflow:hidden}.concept-copy{border-left:1px solid #18221f1f;flex-direction:column;padding:clamp(24px,4vw,42px);display:flex}.concept-count{color:#315e4e;letter-spacing:.08em;font-size:9px;font-weight:900}.concept-copy>h3{letter-spacing:-.055em;margin:10px 0;font-size:clamp(31px,4vw,50px);line-height:1}.concept-copy>p{color:#626c67;margin:0;font-size:12px;line-height:1.7}.concept-formula{border-right:4px solid var(--acid);color:#fff;text-align:left;background:#203e33;border-radius:7px;margin:22px 0;padding:15px 17px;font:700 16px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}.concept-controls{gap:12px;margin-top:auto;display:grid}.concept-controls.two-col{grid-template-columns:1fr 1fr}.concept-slider{background:#fff;border:1px solid #dedbd2;border-radius:8px;gap:7px;padding:10px 12px;display:grid}.concept-slider>span{color:#65706a;justify-content:space-between;font-size:10px;display:flex}.concept-slider b{color:#315e4e;background:#eef2dd;border-radius:50%;place-items:center;width:24px;height:24px;display:grid}.concept-slider input{accent-color:#315e4e;cursor:ew-resize;width:100%}.concept-check{background:var(--ink);color:#fff;cursor:pointer;box-shadow:5px 5px 0 var(--acid);border:0;border-radius:7px;margin-top:14px;padding:14px 17px;font-size:11px;font-weight:900}.concept-feedback{background:#f1dfdc;border-radius:8px;margin-top:17px;padding:14px 15px;animation:.25s ease-out reward-pop}.concept-feedback.success{background:#e1edd8}.concept-feedback b{color:#315e4e;font-size:10px}.concept-feedback.try b{color:#9a514a}.concept-feedback p{color:#5e6863;margin:5px 0 0;font-size:9px;line-height:1.55}.concept-canvas{background:#dce9e3;flex-direction:column;justify-content:center;align-items:center;padding:clamp(20px,4vw,42px);display:flex}.concept-plane{filter:drop-shadow(0 16px 28px #18221f1f);width:min(100%,500px);height:auto}.concept-canvas>p{color:#466057;text-align:center;max-width:470px;margin:20px 0 0;font-size:11px;line-height:1.55}.concept-progress{grid-template-columns:1fr auto auto;align-items:center;gap:18px;margin-top:18px;display:grid}.concept-progress>div{background:#d8d5cc;border-radius:99px;height:8px;overflow:hidden}.concept-progress>div span{border-radius:inherit;background:#315e4e;height:100%;transition:width .35s;display:block}.concept-progress b{font-size:10px}.concept-progress small{color:#747c77;font-size:9px}.section-block{padding:120px 0 30px}.section-heading{justify-content:space-between;align-items:end;gap:50px;margin-bottom:40px;display:flex}.section-heading.compact{margin-bottom:26px}.section-kicker{color:#5e776e}.section-heading h2{letter-spacing:-.045em;margin:10px 0 0;font-size:clamp(38px,4.5vw,58px);line-height:1}.section-heading>p{color:#666d68;max-width:390px;margin:0;font-size:14px;line-height:1.65}.topic-grid{grid-template-columns:repeat(3,1fr);gap:15px;display:grid}.topic-card{border:1px solid var(--line);background:#faf8f2;border-radius:9px;min-height:285px;transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden}.topic-card:hover,.topic-card.active{transform:translateY(-4px);box-shadow:0 14px 28px #18221f17}.topic-card.active{outline:2px solid var(--ink);outline-offset:-2px}.topic-select{text-align:right;cursor:pointer;background:0 0;border:0;width:100%;height:228px;padding:24px}.topic-order{opacity:.55;font-size:11px;font-weight:800}.topic-formula{text-align:center;direction:ltr;place-items:center;min-height:64px;margin:18px 0 4px;padding:8px 5px;display:grid;overflow:hidden}.topic-formula .math-display{overflow:visible}.topic-formula .katex{font-size:30px}.topic-card h3{letter-spacing:-.025em;margin:15px 0 6px;font-size:20px}.topic-card p{color:#18221f9e;margin:0;font-size:12px}.topic-bottom{border-top:1px solid #18221f1a;justify-content:space-between;align-items:center;height:57px;padding:0 24px;font-size:11px;font-weight:700;display:flex}.check-button{cursor:pointer;background:#ffffff80;border:1px solid #18221f59;border-radius:50%;width:26px;height:26px}.check-button.checked{background:var(--ink);color:#fff}.topic-card.mint{background:#d9eadf}.topic-card.blue{background:#dce6f3}.topic-card.pink{background:#ecdce6}.topic-card.orange{background:#f0dfcf}.topic-card.purple{background:#e4dded}.topic-card.yellow{background:#efe8c8}.active-topic-panel{border:1px solid var(--line);background:#fbfaf6;border-radius:9px;grid-template-columns:1.1fr 1fr auto;align-items:center;gap:38px;margin-top:18px;padding:28px 30px;display:grid}.active-topic-panel>div>span{color:#65756f;text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:800}.active-topic-panel h3{margin:6px 0 4px;font-size:22px}.active-topic-panel p{color:#6c726e;margin:0;font-size:12px}.active-topic-panel ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.active-topic-panel li{align-items:center;gap:9px;font-size:12px;display:flex}.active-topic-panel li span{color:#315e4e;background:#dce7d9;border-radius:50%;place-items:center;width:19px;height:19px;font-size:10px;display:grid}.active-topic-panel>a{background:var(--ink);color:#fff;border-radius:5px;align-items:center;gap:18px;padding:13px 16px;font-size:12px;font-weight:800;display:flex}.arcade-block{background:var(--ink);color:#fff;border-radius:18px;margin-top:92px;padding:70px 54px 58px;overflow:hidden}.arcade-heading{grid-template-columns:1fr auto;align-items:end;gap:60px;display:grid}.arcade-heading h2{letter-spacing:-.055em;margin:11px 0 12px;font-size:clamp(40px,5vw,68px);line-height:.96}.arcade-heading>div:first-child>p{color:#ffffff9e;max-width:540px;margin:0;line-height:1.7}.scoreboard{border:1px solid #ffffff29;border-radius:10px;grid-template-columns:repeat(2,130px);display:grid;overflow:hidden}.scoreboard>div{border-bottom:1px solid #ffffff1f;border-left:1px solid #ffffff1f;flex-direction:column;justify-content:center;gap:6px;min-height:82px;padding:13px 16px;display:flex}.scoreboard>div:nth-child(2n){border-left:0}.scoreboard>div:nth-last-child(-n+2){border-bottom:0}.scoreboard span{color:#ffffff85;text-transform:uppercase;letter-spacing:.07em;font-size:9px}.scoreboard b{color:var(--acid);font-variant-numeric:tabular-nums;font-size:21px}.reward-system{grid-template-columns:.72fr 1.28fr;gap:12px;margin-top:28px;display:grid}.reward-level-card,.mission-panel{background:#ffffff0e;border:1px solid #ffffff24;border-radius:11px}.reward-level-card{padding:23px}.reward-level-top{justify-content:space-between;align-items:end;gap:18px;display:flex}.reward-level-top span{color:#ffffff8a;text-transform:uppercase;letter-spacing:.08em;font-size:9px;font-weight:900}.reward-level-top h3{margin:7px 0 0;font-size:24px}.reward-level-top>b{color:var(--acid);font-variant-numeric:tabular-nums;font-size:27px}.reward-level-top>b small{color:#ffffff73;margin-right:4px;font-size:10px}.reward-level-track{background:#ffffff1c;border-radius:99px;height:10px;margin:23px 0 19px;overflow:hidden}.reward-level-track span{border-radius:inherit;background:var(--acid);height:100%;transition:width .35s;display:block;box-shadow:0 0 18px #d8ff596b}.reward-perks{gap:8px;display:grid}.reward-perks span{color:#ffffff87;font-size:9px;line-height:1.5}.reward-perks b{color:#fff}.mission-panel{padding:20px}.mission-heading{justify-content:space-between;align-items:end;gap:24px;margin-bottom:14px;display:flex}.mission-heading span{color:var(--acid);text-transform:uppercase;letter-spacing:.08em;font-size:9px;font-weight:900}.mission-heading h3{margin:6px 0 0;font-size:20px}.mission-heading>p{color:#ffffff7a;max-width:220px;margin:0;font-size:9px;line-height:1.5}.mission-grid{gap:7px;display:grid}.mission-card{background:#00000017;border:1px solid #ffffff1a;border-radius:7px;grid-template-columns:36px 1fr auto;align-items:center;gap:11px;min-width:0;padding:10px;display:grid}.mission-card.ready{background:#d8ff5912;border-color:#d8ff598c}.mission-card.claimed{opacity:.68}.mission-icon{width:36px;height:36px;color:var(--acid);background:#ffffff1a;border-radius:50%;place-items:center;font:700 17px/1 Georgia,serif;display:grid}.mission-card.ready .mission-icon,.mission-card.claimed .mission-icon{background:var(--acid);color:var(--ink)}.mission-copy{min-width:0}.mission-copy>span{color:#ffffff80;font-size:8px;font-weight:800;display:block}.mission-copy>b{margin-top:3px;font-size:10px;display:block}.mission-progress{background:#ffffff1c;border-radius:99px;height:4px;margin:7px 0 5px;overflow:hidden}.mission-progress span{border-radius:inherit;background:var(--acid);height:100%;display:block}.mission-copy small{color:#ffffff7a;font-size:8px}.mission-card>button{color:#ffffff7a;background:0 0;border:1px solid #ffffff2e;border-radius:5px;min-width:50px;padding:8px 9px;font-size:9px;font-weight:900}.mission-card.ready>button{border-color:var(--acid);background:var(--acid);color:var(--ink);cursor:pointer}.mission-card.claimed>button{color:var(--acid);border-color:#0000}.reward-research{border-top:1px solid #ffffff1a;margin-top:13px;padding-top:13px}.reward-research summary{color:#ffffffb3;cursor:pointer;font-size:9px;font-weight:900}.reward-research p{color:#ffffff80;margin:10px 0 9px;font-size:9px;line-height:1.65}.reward-research>div{flex-wrap:wrap;gap:10px;display:flex}.reward-research a{color:var(--acid);border-bottom:1px solid #d8ff5959;font-size:8px;font-weight:800}.badge-row{gap:9px;margin:34px 0 20px;display:flex}.badge{border:1px solid #ffffff21;border-radius:999px;align-items:center;gap:8px;padding:8px 11px;font-size:10px;display:flex}.badge span{border-radius:50%;place-items:center;width:24px;height:24px;display:grid}.badge.unlocked{background:#d8ff5914;border-color:#d8ff5952}.badge.unlocked span{background:var(--acid);color:var(--ink)}.badge.locked{opacity:.35}.badge.locked span{background:#ffffff24}.arcade-tabs{grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:12px;display:grid}.arcade-tabs>button{color:#fff;text-align:right;cursor:pointer;background:#ffffff0e;border:1px solid #ffffff21;border-radius:9px;flex-direction:column;align-items:flex-start;min-height:150px;padding:18px;transition:transform .18s,background .18s,border-color .18s;display:flex;position:relative}.arcade-tabs>button:hover{background:#ffffff17;transform:translateY(-3px)}.arcade-tabs>button.active{border-color:var(--acid);box-shadow:inset 0 -3px 0 var(--acid);background:#d8ff591a}.arcade-tabs>button>span{color:var(--acid);font:600 30px/1 Georgia,serif}.arcade-tabs>button b{margin:14px 0 5px;font-size:15px}.arcade-tabs>button small{color:#ffffff85;font-size:9px;line-height:1.45}.arcade-tabs>button em{color:var(--acid);margin-top:auto;padding-top:12px;font-size:9px;font-style:normal;font-weight:800}.arcade-arena{min-height:535px;color:var(--ink);background:#f6f3ec;border-radius:13px;padding:clamp(26px,4.5vw,54px)}.arcade-arena.lime{background:#e8f2be}.arcade-arena.blue{background:#dce6f3}.arcade-arena.pink{background:#ecdce6}.arcade-arena.orange{background:#f0dfcf}.arcade-arena.purple{background:#e4dded}.arena-top{justify-content:space-between;align-items:center;gap:30px;display:flex}.arena-title{align-items:center;gap:13px;display:flex}.arena-title>span{background:var(--ink);width:48px;height:48px;color:var(--acid);border-radius:50%;place-items:center;font:600 23px/1 Georgia,serif;display:grid}.arena-title>div{flex-direction:column;gap:3px;display:flex}.arena-title small{color:#68736e;font-size:10px}.arena-title b{font-size:13px}.arena-reward{background:var(--ink);color:var(--acid);border-radius:99px;padding:8px 11px;font-size:10px;font-weight:800}.arena-progress{background:#18221f1f;border-radius:99px;height:5px;margin:20px 0 34px;overflow:hidden}.arena-progress span{border-radius:inherit;background:var(--ink);height:100%;transition:width .3s;display:block}.arena-source{color:#315e4e;background:#ffffff80;border:1px solid #18221f29;border-radius:999px;align-items:center;gap:6px;margin:-18px 0 18px;padding:7px 10px;font-size:8px;font-weight:900;display:inline-flex}.arcade-arena>h3{letter-spacing:-.045em;max-width:840px;margin:0 0 30px;font-size:clamp(30px,4.4vw,54px);line-height:1.08}.arena-options{grid-template-columns:1fr 1fr;gap:10px;display:grid}.arena-options.two-options{grid-template-columns:1fr 1fr}.arena-options button{text-align:right;cursor:pointer;background:#ffffff94;border:1px solid #18221f2e;border-radius:8px;align-items:center;gap:14px;min-height:68px;padding:13px 16px;transition:transform .18s,border-color .18s;display:flex}.arena-options button:not(:disabled):hover{border-color:var(--ink);transform:translateY(-2px)}.arena-options button>span{direction:ltr;border:1px solid #18221f33;border-radius:50%;flex:none;place-items:center;width:31px;height:31px;font-size:12px;font-weight:800;display:grid}.arena-options button.correct{background:#d8e9d8;border-color:#315e4e}.arena-options button.correct>span{color:#fff;background:#315e4e}.arena-options button.wrong{background:#f0d8d6;border-color:#b95f5c}.arena-options button.wrong>span{color:#fff;background:#9e4b49}.arena-feedback{background:#ffffff94;border-radius:8px;justify-content:space-between;align-items:center;gap:28px;margin-top:16px;padding:17px 19px;display:flex}.arena-feedback.success{box-shadow:inset 4px 0 #4b765f}.arena-feedback.wrong{box-shadow:inset 4px 0 #a8514e}.arena-feedback b{font-size:13px}.arena-feedback p{color:#59625e;margin:4px 0 0;font-size:11px;line-height:1.5}.arena-feedback>button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;flex:none;padding:11px 14px;font-size:11px;font-weight:800}.arena-result{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:420px;display:flex}.result-icon{font-size:55px}.arena-result>small{color:#69736e;margin-top:10px;font-weight:800}.arena-result h3{letter-spacing:-.07em;margin:8px 0 5px;font-size:70px;line-height:1}.arena-result p{color:#646c68;margin:0 0 25px}.arena-result>div{gap:9px;display:flex}.arena-result button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;padding:12px 17px;font-weight:800}.arena-result button.secondary{border:1px solid var(--ink);color:var(--ink);background:0 0}.friends-block{grid-template-columns:.72fr 1.28fr;align-items:start;gap:68px;display:grid}.friends-intro{position:sticky;top:108px}.friends-intro h2{letter-spacing:-.055em;margin:12px 0 14px;font-size:clamp(42px,5vw,64px);line-height:.98}.friends-intro p{color:#65706b;max-width:420px;margin:0;font-size:14px;line-height:1.7}.friends-board{border:1px solid var(--line);background:#fbfaf6;border-radius:13px;overflow:hidden;box-shadow:10px 10px #e1e7d8}.friends-board-head{border-bottom:1px solid var(--line);background:var(--ink);color:#fff;justify-content:space-between;align-items:center;gap:20px;padding:22px 24px;display:flex}.friends-board-head div{flex-direction:column;gap:5px;display:flex}.friends-board-head div span{color:#ffffff80;letter-spacing:.08em;text-transform:uppercase;font-size:9px;font-weight:900}.friends-board-head b{font-size:15px}.beta-pill{background:var(--acid);color:var(--ink);border-radius:99px;padding:7px 10px;font-size:8px;font-weight:900}.invite-strip{border-bottom:1px solid var(--line);background:#e4dded;grid-template-columns:1fr auto 38px;align-items:center;gap:9px;padding:13px 18px;display:grid}.invite-strip>div{align-items:center;gap:11px;display:flex}.invite-strip>div span{color:#68716d;font-size:8px;font-weight:900}.invite-strip strong{letter-spacing:.14em;font-size:17px}.invite-strip>button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;min-height:36px;padding:0 12px;font-size:9px;font-weight:900}.invite-strip>button.refresh-group{border:1px solid var(--ink);width:38px;color:var(--ink);background:0 0;padding:0;font-size:16px}.leaderboard-list{margin:0;padding:0;list-style:none}.leaderboard-list li{border-bottom:1px solid var(--line);grid-template-columns:35px 40px 1fr auto 28px;align-items:center;gap:11px;min-height:72px;padding:10px 18px;display:grid}.leaderboard-list li.is-me{background:#e9f3bf}.leader-rank{color:#6d746f;text-align:center;font:italic 17px Georgia,serif}.leader-avatar{width:40px;height:40px;color:var(--ink);background:#dce6f3;border-radius:50%;place-items:center;font-size:14px;font-weight:900;display:grid}.is-me .leader-avatar{background:var(--ink);color:var(--acid)}.leaderboard-list li>b{flex-direction:column;gap:3px;font-size:13px;display:flex}.leaderboard-list li>b small{color:#617069;font-size:8px;font-weight:700}.leaderboard-list strong{color:#315e4e;font-variant-numeric:tabular-nums;font-size:14px}.rank-change{color:#858b87;text-align:center;font-size:11px;font-weight:900}.rank-change.up{color:#315e4e}.leaderboard-list label{align-items:center;gap:5px;display:flex}.leaderboard-list label input{border:1px solid var(--line);text-align:left;direction:ltr;background:#fff;border-radius:6px;width:92px;padding:8px 9px;font-weight:800}.leaderboard-list label em{color:#68716d;font-size:8px;font-style:normal;font-weight:900}.leaderboard-list li>button{color:#8a8f8b;cursor:pointer;background:0 0;border:0;border-radius:50%;width:27px;height:27px;font-size:19px}.leaderboard-list li>button:hover{color:#9e4b49;background:#f0d8d6}.add-friend-form{background:#f0ede5;grid-template-columns:1fr 130px auto;align-items:end;gap:9px;padding:18px;display:grid}.add-friend-form div{flex-direction:column;gap:6px;display:flex}.add-friend-form label{color:#68716d;font-size:8px;font-weight:900}.add-friend-form input{border:1px solid var(--line);background:#fff;border-radius:6px;outline:none;width:100%;height:42px;padding:0 11px}.add-friend-form input:focus{border-color:#315e4e;box-shadow:0 0 0 3px #315e4e1a}.add-friend-form button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:6px;height:42px;padding:0 14px;font-size:10px;font-weight:900}.add-friend-form button:disabled{cursor:not-allowed;opacity:.4}.group-entry{background:#f0ede5;padding:18px}.group-mode-tabs{grid-template-columns:1fr 1fr;gap:7px;margin-bottom:13px;display:grid}.group-mode-tabs button{border:1px solid var(--line);color:#5f6964;cursor:pointer;background:#ffffff8c;border-radius:6px;min-height:39px;font-size:9px;font-weight:900}.group-mode-tabs button.active{border-color:var(--ink);background:var(--ink);color:#fff}.group-empty{background:#ffffff5c;border:1px dashed #18221f40;border-radius:7px;align-items:center;gap:13px;padding:15px;display:flex}.group-empty>span{background:var(--acid);border-radius:50%;flex:none;place-items:center;width:38px;height:38px;font-size:18px;display:grid}.group-empty b{font-size:11px}.group-empty p{color:#68716d;margin:4px 0 0;font-size:9px;line-height:1.5}.group-form{grid-template-columns:1fr 1fr auto;align-items:end;gap:9px;display:grid}.group-form>div{flex-direction:column;gap:6px;display:flex}.group-form label{color:#68716d;font-size:8px;font-weight:900}.group-form input{border:1px solid var(--line);background:#fff;border-radius:6px;outline:none;width:100%;height:42px;padding:0 11px}.group-form input:focus{border-color:#315e4e;box-shadow:0 0 0 3px #315e4e1a}.group-form button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:6px;height:42px;padding:0 14px;font-size:9px;font-weight:900}.group-form button:disabled{cursor:not-allowed;opacity:.4}.group-error{color:#9e4b49;margin:10px 0 0;font-size:9px;font-weight:800}.group-active-footer{color:#69716d;background:#f0ede5;justify-content:space-between;align-items:center;gap:15px;padding:14px 18px;font-size:9px;display:flex}.group-active-footer button{color:#69716d;cursor:pointer;background:0 0;border:0;border-bottom:1px solid #69716d;font-size:9px}.past-exams-block{padding-bottom:36px}.past-exams-hero{background:#dce6f3;border-radius:16px;grid-template-columns:1.25fr .75fr;align-items:center;gap:64px;padding:54px;display:grid}.past-exams-hero h2{letter-spacing:-.055em;margin:11px 0 16px;font-size:clamp(40px,5vw,66px);line-height:.98}.past-exams-hero h2 em{color:#315e4e;font-family:Georgia,serif;font-weight:400}.past-exams-hero>div:first-child>p{color:#596560;max-width:610px;margin:0 0 24px;font-size:14px;line-height:1.75}.past-exams-hero>div:first-child>a{background:var(--ink);color:#fff;border-radius:5px;align-items:center;gap:20px;padding:13px 17px;font-size:12px;font-weight:800;display:inline-flex}.past-score-card{background:var(--ink);color:#fff;border-radius:11px;padding:28px}.past-score-card>span{color:#ffffff94;font-size:10px;font-weight:800}.past-score-card strong{color:var(--acid);letter-spacing:-.07em;margin:8px 0 17px;font-size:70px;line-height:.9;display:block}.past-score-card strong small{color:#ffffff73;letter-spacing:0;margin-right:7px;font-size:22px}.past-progress{background:#ffffff24;border-radius:99px;height:6px;overflow:hidden}.past-progress span{border-radius:inherit;background:var(--acid);height:100%;transition:width .25s;display:block}.past-score-card p{color:#ffffff94;margin:12px 0 22px;font-size:11px}.past-score-card>b{color:var(--acid);background:#d8ff591a;border-radius:99px;padding:8px 11px;font-size:11px;display:inline-flex}.past-exam-grid{grid-template-columns:repeat(2,1fr);gap:13px;margin-top:14px;display:grid}.past-exam-card{background:#faf8f2;border:1px solid #18221f1f;border-radius:11px;min-width:0;padding:24px;transition:transform .2s,box-shadow .2s}.past-exam-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px #18221f14}.past-exam-card.mint{background:#d9eadf}.past-exam-card.blue{background:#dce6f3}.past-exam-card.pink{background:#ecdce6}.past-exam-card.orange{background:#f0dfcf}.past-exam-card.purple{background:#e4dded}.past-exam-card.yellow{background:#efe8c8}.past-exam-card.recent{border-color:#315e4e4d;position:relative}.recent-exam-label{color:#fff;letter-spacing:.02em;background:#315e4e;border-radius:0 0 5px 5px;padding:5px 9px;font-size:8px;font-weight:900;position:absolute;top:0;left:18px}.past-exam-card.recent .past-exam-top{padding-top:10px}.past-exam-card.complete{box-shadow:inset 0 0 0 2px #315e4e}.past-exam-top{color:#64716c;justify-content:space-between;gap:20px;font-size:10px;font-weight:800;display:flex}.past-exam-card.complete .past-exam-top span{color:#315e4e}.past-exam-top b{color:var(--ink);font-size:13px}.past-exam-card h3{letter-spacing:-.035em;margin:11px 0 5px;font-size:24px}.past-exam-card>p{color:#66706b;margin:12px 0 19px;font-size:11px}.exam-topics{flex-wrap:wrap;gap:5px;margin-top:10px;display:flex}.exam-topics span{color:#55615c;background:#ffffff61;border:1px solid #18221f1f;border-radius:99px;padding:5px 8px;font-size:8px;font-weight:800}.question-checks{grid-template-columns:repeat(6,minmax(0,1fr));gap:7px;display:grid}.question-checks button{min-width:0;min-height:60px;color:var(--ink);cursor:pointer;background:#ffffff8a;border:1px solid #18221f29;border-radius:7px;flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:7px 3px;transition:transform .18s,background .18s;display:flex}.question-checks button:hover{transform:translateY(-2px)}.question-checks button span{border:1px solid #18221f38;border-radius:50%;place-items:center;width:24px;height:24px;font-size:11px;font-weight:800;display:grid}.question-checks button small{color:#6a746f;font-size:8px;font-weight:800}.question-checks button.checked{background:var(--ink);color:#fff}.question-checks button.checked span{border-color:var(--acid);background:var(--acid);color:var(--ink)}.question-checks button.checked small{color:#ffffffa3}.exam-copy{background:#ffffff54;border:1px solid #18221f24;border-radius:8px;margin-top:13px;overflow:hidden}.exam-copy>summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:12px 13px;list-style:none;display:flex}.exam-copy>summary::-webkit-details-marker{display:none}.question-copy>summary::-webkit-details-marker{display:none}.exam-copy>summary span{font-size:11px;font-weight:900}.exam-copy>summary span:before{content:"▣";color:#315e4e;margin-left:8px}.exam-copy>summary small{color:#66716c;font-size:8px;font-weight:800}.exam-copy-body{gap:6px;padding:0 9px 9px;display:grid}.question-copy{background:#ffffff94;border:1px solid #18221f1c;border-radius:6px}.question-copy>summary{cursor:pointer;grid-template-columns:63px 1fr 20px;align-items:center;gap:9px;padding:10px;list-style:none;display:grid}.question-copy>summary b{background:var(--ink);color:#fff;text-align:center;border-radius:4px;padding:5px 6px;font-size:8px}.question-copy>summary span{font-size:10px;font-weight:800}.question-copy>summary em{background:#e4eadb;border-radius:50%;place-items:center;width:20px;height:20px;font-size:13px;font-style:normal;display:grid}.question-copy[open]>summary em{transform:rotate(45deg)}.question-copy p{color:#505c57;margin:0;padding:3px 12px 13px;font-size:10px;line-height:1.75}.scan-disclaimer{color:#737a75;margin:3px 2px 0;font-size:8px;line-height:1.55}.exam-guide{border-top:1px solid #18221f21;margin-top:15px}.exam-guide summary{color:var(--ink);cursor:pointer;justify-content:space-between;align-items:center;gap:10px;padding:15px 2px 2px;list-style:none;display:flex}.exam-guide summary::-webkit-details-marker{display:none}.exam-guide summary span{align-items:center;gap:8px;font-size:11px;font-weight:900;display:inline-flex}.exam-guide summary span:before{content:"+";background:var(--ink);width:20px;height:20px;color:var(--acid);border-radius:50%;place-items:center;font-size:13px;display:grid}.exam-guide[open] summary span:before{content:"−"}.exam-guide summary small{color:#68736e;font-size:8px;font-weight:800}.exam-guide-body{gap:8px;padding-top:13px;display:grid}.exam-guide-item{background:#ffffff7a;border-radius:7px;grid-template-columns:62px 1fr;gap:11px;padding:11px;display:grid}.exam-guide-item>b{background:var(--ink);color:#fff;text-align:center;border-radius:4px;align-self:start;padding:5px 7px;font-size:8px}.exam-guide-item strong{font-size:10px;display:block}.exam-guide-item p{color:#5b6661;margin:4px 0 0;font-size:9px;line-height:1.6}.exam-guide-body>a{color:#315e4e;text-underline-offset:3px;justify-self:start;margin-top:2px;font-size:9px;font-weight:900;text-decoration:underline}.past-note{border:1px solid var(--line);color:#68716d;border-radius:8px;align-items:center;gap:11px;margin-top:14px;padding:14px 17px;display:flex}.past-note span{background:var(--ink);width:22px;height:22px;color:var(--acid);border-radius:50%;flex:none;place-items:center;font:italic 13px Georgia,serif;display:grid}.past-note p{margin:0;font-size:10px;line-height:1.55}.quiz-block{padding-bottom:30px}.study-lab-grid{grid-template-columns:1.45fr .55fr;gap:16px;display:grid}.quiz-card,.mistake-card{border:1px solid var(--line);background:#fbfaf6;border-radius:11px}.quiz-card{min-height:520px;padding:clamp(25px,4vw,48px)}.quiz-meta{color:#60716a;justify-content:space-between;font-size:11px;font-weight:800;display:flex}.quiz-progress{background:#e2e0d9;border-radius:99px;height:5px;margin:13px 0 36px;overflow:hidden}.quiz-progress span{border-radius:inherit;background:#315e4e;height:100%;transition:width .3s;display:block}.quiz-card h3{letter-spacing:-.035em;max-width:680px;margin:0 0 28px;font-size:clamp(25px,3.2vw,37px);line-height:1.18}.quiz-options{grid-template-columns:1fr 1fr;gap:10px;display:grid}.quiz-options button{border:1px solid var(--line);text-align:right;cursor:pointer;background:#f5f2eb;border-radius:7px;align-items:center;gap:13px;min-height:62px;padding:12px 14px;transition:border .2s,transform .2s;display:flex}.quiz-options button:not(:disabled):hover{border-color:#315e4e;transform:translateY(-2px)}.quiz-options button>span{border:1px solid var(--line);direction:ltr;border-radius:50%;flex:none;place-items:center;width:28px;height:28px;font-size:11px;font-weight:800;display:grid}.quiz-options button.correct{background:#dfede3;border-color:#4b765f}.quiz-options button.correct>span{color:#fff;background:#315e4e}.quiz-options button.wrong{background:#f2dddd;border-color:#c56b68}.quiz-options button.wrong>span{color:#fff;background:#a8514e}.quiz-feedback{background:#e7eadc;border-radius:7px;margin-top:18px;padding:17px 19px}.quiz-feedback.try-again{background:#f0e5db}.quiz-feedback b{font-size:13px}.quiz-feedback p{color:#59625e;margin:5px 0 10px;font-size:12px;line-height:1.6}.quiz-feedback button,.quiz-result button{cursor:pointer;border:0;border-bottom:1px solid var(--ink);background:0 0;padding:0;font-size:12px;font-weight:800}.quiz-result{flex-direction:column;justify-content:center;align-items:flex-start;min-height:420px;display:flex}.quiz-result>span{color:#60716a;font-size:11px;font-weight:800}.quiz-result>div{letter-spacing:-.08em;margin:12px 0 20px;font-size:104px;font-weight:800;line-height:.8}.quiz-result>div small{color:#7c837e;letter-spacing:0;font-size:24px}.quiz-result h3{margin-bottom:8px}.quiz-result p{color:#666d68;max-width:480px;margin:0 0 24px;line-height:1.7}.mistake-card{background:#dce6f3;padding:30px;position:relative;overflow:hidden}.mistake-icon{color:#18221f14;font:160px/1 Georgia,serif;position:absolute;top:6px;left:20px;transform:rotate(8deg)}.mistake-card .section-kicker{position:relative}.mistake-card h3{letter-spacing:-.035em;margin:16px 0 8px;font-size:28px;position:relative}.mistake-card>p{color:#5e6864;margin:0 0 22px;font-size:13px;line-height:1.65;position:relative}.mistake-card textarea{resize:vertical;background:#ffffff9e;border:1px solid #18221f33;border-radius:7px;outline:none;width:100%;min-height:210px;padding:16px;line-height:1.65;position:relative}.mistake-card textarea:focus{border-color:#315e4e;box-shadow:0 0 0 3px #315e4e1a}.saved-note{color:#64706b;align-items:center;gap:7px;margin-top:13px;font-size:10px;display:flex;position:relative}.saved-note span{color:#4b765f;font-size:8px}.materials-block{padding-bottom:110px}.resource-list{border-top:1px solid var(--ink)}.resource-row{border-bottom:1px solid var(--line);grid-template-columns:60px 1fr auto 40px;align-items:center;gap:20px;padding:21px 8px;transition:background .2s,padding .2s;display:grid}.resource-row:hover{background:#ebe7dc;padding-inline:18px}.resource-index{color:#6d746f;font:italic 16px Georgia,serif}.resource-copy{flex-direction:column;gap:5px;display:flex}.resource-copy b{font-size:17px}.resource-copy small{color:#747a76}.resource-tag{border:1px solid var(--line);border-radius:99px;padding:7px 10px;font-size:11px}.resource-arrow{font-size:20px}.math-lab-block{color:#fff;background:#203e33;border-radius:18px;margin-bottom:92px;padding:72px 54px 54px;overflow:hidden}.math-lab-heading{grid-template-columns:1fr .72fr;align-items:end;gap:60px;display:grid}.math-lab-heading h2{letter-spacing:-.06em;margin:10px 0 0;font-size:clamp(45px,6vw,76px);line-height:.91}.math-lab-heading h2 em{color:var(--acid);font-family:Georgia,serif;font-weight:400}.math-lab-heading>p{color:#ffffffa3;margin:0;font-size:13px;line-height:1.75}.math-lab-tabs{grid-template-columns:repeat(3,1fr);gap:9px;margin:35px 0 11px;display:grid}.math-lab-tabs>button{color:#fff;text-align:right;cursor:pointer;background:#ffffff0f;border:1px solid #ffffff26;border-radius:9px;grid-template-rows:1fr auto;grid-template-columns:48px 1fr;align-items:center;column-gap:13px;min-height:112px;padding:16px;transition:transform .18s,border-color .18s;display:grid}.math-lab-tabs>button:hover{transform:translateY(-3px)}.math-lab-tabs>button.active{border-color:var(--acid);box-shadow:inset 0 -3px 0 var(--acid)}.math-lab-tabs>button>span{background:var(--acid);width:48px;height:48px;color:var(--ink);direction:ltr;border-radius:50%;grid-row:1/3;place-items:center;font:700 21px Georgia,serif;display:grid}.math-lab-tabs b{font-size:15px}.math-lab-tabs small{color:#ffffff85;font-size:9px}.math-lab-game{min-height:500px;color:var(--ink);border-radius:13px;padding:clamp(25px,4.5vw,52px)}.math-lab-game.lab-lime{background:#e8f2be}.math-lab-game.lab-blue{background:#dce6f3}.math-lab-game.lab-pink{background:#ecdce6}.lab-game-top{justify-content:space-between;align-items:center;gap:25px;display:flex}.lab-game-top>div{align-items:center;gap:12px;display:flex}.lab-game-top>div>span{background:var(--ink);width:46px;height:46px;color:var(--acid);direction:ltr;border-radius:50%;place-items:center;font:700 20px Georgia,serif;display:grid}.lab-game-top p{flex-direction:column;gap:4px;margin:0;display:flex}.lab-game-top small{color:#65706b;font-size:9px;font-weight:800}.lab-game-top b{font-size:12px}.lab-game-top>strong{background:var(--ink);color:var(--acid);border-radius:99px;padding:8px 11px;font-size:10px}.lab-game-progress{background:#18221f1f;border-radius:99px;height:5px;margin:18px 0 38px;overflow:hidden}.lab-game-progress span{border-radius:inherit;background:var(--ink);height:100%;display:block}.math-lab-game>h3{letter-spacing:-.045em;max-width:840px;margin:0 0 31px;font-size:clamp(31px,4.4vw,54px);line-height:1.08}.lab-game-options{grid-template-columns:1fr 1fr;gap:9px;display:grid}.lab-game-options button{text-align:right;cursor:pointer;background:#ffffff94;border:1px solid #18221f2b;border-radius:7px;align-items:center;gap:13px;min-height:66px;padding:13px 15px;transition:transform .18s,border-color .18s;display:flex}.lab-game-options button:not(:disabled):hover{border-color:var(--ink);transform:translateY(-2px)}.lab-game-options button>span{direction:ltr;border:1px solid #18221f33;border-radius:50%;flex:none;place-items:center;width:30px;height:30px;font-size:11px;font-weight:800;display:grid}.lab-game-options button.correct{background:#d8e9d8;border-color:#315e4e}.lab-game-options button.wrong{background:#f0d8d6;border-color:#a8514e}.lab-game-options button.correct>span{color:#fff;background:#315e4e}.lab-game-options button.wrong>span{color:#fff;background:#a8514e}.lab-game-feedback{background:#ffffff94;border-radius:7px;justify-content:space-between;align-items:center;gap:25px;margin-top:14px;padding:16px 18px;display:flex}.lab-game-feedback b{font-size:12px}.lab-game-feedback p{color:#59635e;margin:4px 0 0;font-size:10px;line-height:1.5}.lab-game-feedback>button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;flex:none;padding:11px 14px;font-size:10px;font-weight:900}.lab-game-result{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:390px;display:flex}.lab-game-result>span{font:55px Georgia,serif}.lab-game-result>small{color:#68716d;font-size:9px;font-weight:900}.lab-game-result h3{letter-spacing:-.07em;margin:7px 0 5px;font-size:72px;line-height:1}.lab-game-result p{color:#5e6863;margin:0 0 22px}.lab-game-result>div{gap:8px;display:flex}.lab-game-result button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;padding:12px 16px;font-size:10px;font-weight:900}.lab-game-result button.secondary{border:1px solid var(--ink);color:var(--ink);background:0 0}.outside-play{border-top:1px solid #ffffff26;margin-top:38px;padding-top:35px}.outside-play-head{justify-content:space-between;align-items:end;gap:40px;margin-bottom:20px;display:flex}.outside-play-head span{color:var(--acid);letter-spacing:.08em;text-transform:uppercase;font-size:9px;font-weight:900}.outside-play-head h3{margin:6px 0 0;font-size:25px}.outside-play-head p{color:#ffffff85;max-width:390px;margin:0;font-size:10px;line-height:1.6}.outside-play-grid{grid-template-columns:repeat(4,1fr);gap:9px;display:grid}.outside-play-grid a{background:#ffffff0e;border:1px solid #ffffff24;border-radius:9px;flex-direction:column;align-items:flex-start;min-height:220px;padding:19px;transition:transform .18s,background .18s;display:flex}.outside-play-grid a:hover{background:#ffffff17;transform:translateY(-4px)}.outside-play-grid a>span{background:var(--acid);width:39px;height:39px;color:var(--ink);border-radius:50%;place-items:center;font:700 17px Georgia,serif;display:grid}.outside-play-grid small{color:var(--acid);margin-top:16px;font-size:8px;font-weight:900}.outside-play-grid h4{margin:7px 0 6px;font-size:16px}.outside-play-grid p{color:#ffffff8c;margin:0;font-size:9px;line-height:1.55}.outside-play-grid b{margin-top:auto;padding-top:17px;font-size:9px}.exam-teaser{background:var(--ink);color:#fff;border-radius:12px;grid-template-columns:1.2fr .8fr auto;align-items:center;gap:50px;margin-bottom:90px;padding:48px;display:grid}.section-kicker.light{color:var(--acid)}.exam-teaser h2{letter-spacing:-.04em;margin:12px 0 0;font-size:clamp(32px,3.8vw,48px);line-height:1.03}.exam-rule{border-right:1px solid #ffffff2e;padding-right:30px}.exam-rule span{color:var(--acid);font-size:11px;font-weight:800}.exam-rule p{color:#ffffffad;margin:8px 0 0;font-size:13px;line-height:1.7}.exam-teaser>a{white-space:nowrap;background:var(--acid);color:var(--ink);border-radius:5px;align-items:center;gap:20px;padding:14px 18px;font-size:13px;font-weight:800;display:flex}footer{border-top:1px solid var(--line);color:#727873;flex-wrap:wrap;justify-content:space-between;gap:14px 30px;padding:28px clamp(22px,4vw,64px);font-size:12px;display:flex}footer .legal-note{color:#8a908c;flex-basis:100%;font-size:10px;line-height:1.6}body{color:#f4f7ff;background-color:#060914;background-image:radial-gradient(circle at 16% 8%,#5cffcb1c,#0000 28%),radial-gradient(circle at 88% 22%,#695cff21,#0000 30%),linear-gradient(#ffffff06 1px,#0000 1px),linear-gradient(90deg,#ffffff06 1px,#0000 1px);background-size:auto,auto,42px 42px,42px 42px}.topbar{background:#060914d6;border-color:#ffffff1c;box-shadow:0 12px 40px #00000040}.brand,.topbar nav,.dark-site .dashboard h1,.dark-site .section-heading h2,.dark-site .course-horizon h2{color:#f7f9ff}.brand-word b,.dark-site .dashboard h1 em,.dark-site .course-horizon h2 em{color:#b7ff4a;text-shadow:0 0 24px #b7ff4a38}.topbar nav a{color:#d8dfef}.course-picker summary,.account-pill{color:#f4f7ff;background:#101828;border-color:#ffffff24}.course-picker>div{background:#0d1422;border-color:#ffffff1f;box-shadow:0 22px 60px #0000007a}.course-picker>div a:hover,.course-picker>div a.active{color:#07100c;background:#b7ff4a}.account-pill>span{color:#72e8ff;background:#222b46}.score-pill{background:#101827;border:1px solid #b7ff4a59;box-shadow:0 0 24px #b7ff4a14}.dark-site .eyebrow{color:#a8eefa;background:#72e8ff0f;border-color:#72e8ff47}.dark-site .eyebrow span{color:#b7ff4a}.dark-site .dashboard-copy>p,.dark-site .section-heading>p,.dark-site .course-horizon p{color:#e0e7f6ab}.dark-site .personal-origin{background:linear-gradient(120deg,#b7ff4a1c,#72e8ff0f);border-color:#b7ff4a}.dark-site .personal-origin b{color:#b7ff4a}.dark-site .personal-origin span{color:#e7ecf8ad}.dark-site .primary-button{color:#07100c;background:#b7ff4a;box-shadow:7px 7px #5447d8}.dark-site .primary-button:hover{box-shadow:4px 4px #5447d8}.dark-site .text-button{color:#72e8ff;border-color:#72e8ff}.dark-site .progress-card,.dark-site .course-horizon,.dark-site .active-topic-panel{color:#f5f7ff;background:#0f1626e0;border-color:#ffffff1f;box-shadow:12px 12px #5447d840}.dark-site .progress-card p,.dark-site .progress-note,.dark-site .profile-level span,.dark-site .active-topic-panel p{color:#e1e8f694}.dark-site .progress-topline b,.dark-site .profile-level b,.dark-site .active-topic-panel>div>span{color:#72e8ff}.dark-site .progress-track,.dark-site .level-track{background:#263047}.dark-site .progress-track span{background:linear-gradient(90deg,#72e8ff,#b7ff4a)}.dark-site .course-chips b,.dark-site .course-chips>a{color:#dbe3f4;background:#121b2d;border-color:#ffffff26}.dark-site .course-chips>a:hover{box-shadow:0 0 24px #72e8ff1f}.session-studio{background:linear-gradient(145deg,#0a101d,#11192b 58%,#0b1220);border:1px solid #72e8ff1f;box-shadow:0 28px 90px #0000006b,0 0 50px #5447d814}.session-explainer,.session-game{background:#ffffff09;border-color:#ffffff1a}.session-game{color:#f4f7ff}.session-game-top .session-step,.session-question-meta span{color:#72e8ff}.session-levels button{color:#eef3ff;background:#121b2d;border-color:#ffffff1f}.session-levels button span,.session-game-top>b{color:#e0e7f68c}.session-levels button small{color:#72e8ff}.session-levels button.active{color:#07100c;box-shadow:none;background:#b7ff4a;border-color:#b7ff4a}.session-levels button.active span{color:#07100c9e}.session-levels button.active small{color:#173b2a}.session-question-card,.session-complete{color:#f4f7ff;background:#0c1423;box-shadow:inset 0 0 0 1px #ffffff0d}.session-question-meta,.session-feedback p,.session-complete>p,.session-complete>small{color:#e1e8f694}.session-progress{background:#263047}.session-progress span{background:linear-gradient(90deg,#72e8ff,#b7ff4a)}.session-options button{color:#f2f6ff;background:#131d30;border-color:#ffffff21}.session-options button:not(:disabled):hover{background:#17253c;border-color:#72e8ff}.session-options button>span{border-color:#ffffff38}.solution-tools{border-color:#ffffff1a}.solution-tools>span{color:#e1e8f687}.solution-tools button{color:#cbd5e8;background:#111b2c;border-color:#ffffff21}.solution-tools button.active{color:#07100c;background:#b7ff4a;border-color:#b7ff4a}.solution-drawer{background:#172238}.solution-drawer>p,.solution-drawer>ol p{color:#ebf0fab3}.full-answer{color:#cbd5e8;background:#0d1524}.session-feedback{background:#5ae2aa1f}.session-feedback.wrong{background:#ff667d1f}.session-feedback>button,.session-complete button.next-level,.session-complete a{color:#07100c;background:#b7ff4a}.session-complete button{color:#eef3ff;border-color:#fff3}.dark-site .topic-card,.dark-site .topic-card.mint,.dark-site .topic-card.blue,.dark-site .topic-card.pink,.dark-site .topic-card.orange,.dark-site .topic-card.purple,.dark-site .topic-card.yellow{color:#f4f7ff;background:linear-gradient(145deg,#101929,#141f33);border-color:#ffffff1c}.dark-site .topic-card:nth-child(2n){background:linear-gradient(145deg,#12172d,#18203a)}.dark-site .topic-card:hover,.dark-site .topic-card.active{border-color:#b7ff4aa6;box-shadow:0 16px 45px #00000052,0 0 30px #b7ff4a12}.dark-site .topic-order,.dark-site .topic-card p,.dark-site .topic-bottom{color:#dfe7f591}.dark-site .topic-formula{color:#72e8ff}.dark-site .active-topic-panel li span{color:#b7ff4a;background:#b7ff4a24}.dark-site .active-topic-panel>a{color:#07100c;background:#b7ff4a}.dark-site .visual-linear-lab{color:#f4f7ff;background:#0e1626;border:1px solid #ffffff1a;box-shadow:0 24px 70px #0000004d}.dark-site .concept-lesson-tabs button,.dark-site .concept-workbench{color:#eef3ff;background:#121b2d;border-color:#ffffff1c}.dark-site .concept-lesson-tabs button.active{color:#07100c;background:#b7ff4a;border-color:#b7ff4a}.dark-site .concept-copy>p,.dark-site .concept-copy li{color:#e1e8f6a8}.dark-site .concept-canvas{background:#17243a}.dark-site .friends-board,.dark-site .past-exam-card,.dark-site .quiz-card,.dark-site .mistake-card{color:#f4f7ff;background:#101929;border-color:#ffffff1c;box-shadow:10px 10px #5447d833}.dark-site .past-exam-card.mint,.dark-site .past-exam-card.blue,.dark-site .past-exam-card.pink,.dark-site .past-exam-card.orange,.dark-site .past-exam-card.purple,.dark-site .past-exam-card.yellow{background:#101929}.dark-site .past-exams-hero{color:#f5f7ff;background:linear-gradient(135deg,#111a31,#0d2430);border:1px solid #72e8ff29}.dark-site .resource-list{border-color:#fff3}.dark-site .resource-row{color:#eef3ff;border-color:#ffffff1a}.dark-site .resource-row:hover{background:#72e8ff0f}.dark-site .resource-copy small,.dark-site .resource-index{color:#e1e8f68c}.dark-site footer{color:#e1e8f685;border-color:#ffffff1a}@media (width<=920px){.topbar{grid-template-columns:1fr auto}.topbar nav{display:none}.dashboard{grid-template-columns:1fr;min-height:auto;padding-top:68px}.progress-card{width:min(380px,100%);margin:0}.focus-strip{grid-template-columns:100px 1fr 58px}.focus-steps{border-top:1px solid #ffffff26;grid-column:1/-1;padding-top:20px}.mastery-heading,.mastery-layout,.learning-protocol{grid-template-columns:1fr}.protocol-steps,.syllabus-map>div{grid-template-columns:repeat(3,1fr)}.topic-grid{grid-template-columns:repeat(2,1fr)}.active-topic-panel{grid-template-columns:1fr 1fr}.active-topic-panel>a{grid-column:1/-1;justify-content:center}.arcade-block{padding-inline:30px}.arcade-heading{grid-template-columns:1fr}.scoreboard{grid-template-columns:repeat(4,1fr)}.scoreboard>div{border-bottom:0;border-left:1px solid #ffffff1f}.reward-system{grid-template-columns:1fr}.arcade-tabs{grid-template-columns:repeat(3,1fr)}.past-exams-hero{grid-template-columns:1fr;gap:34px}.study-lab-grid{grid-template-columns:1fr}.exam-teaser{grid-template-columns:1fr 1fr}.exam-teaser>a{grid-column:1/-1;justify-content:center}}@media (width<=620px){.brand-word{font-size:14px}.page-shell{width:min(100% - 28px,1180px)}.topbar{min-height:62px;padding:10px 16px}.brand{font-size:15px}.brand-mark{width:32px;height:32px}.score-pill{padding:8px 10px}.reward-toast{width:calc(100% - 28px);top:74px;left:14px}.dashboard{gap:44px;padding:52px 0}.dashboard h1{font-size:51px}.dashboard-copy>p{font-size:16px}.personal-origin{grid-template-columns:1fr;gap:6px}.personal-origin b{white-space:normal}.hero-actions{flex-direction:column;align-items:flex-start}.primary-button{justify-content:space-between;width:calc(100% - 6px)}.focus-strip{grid-template-columns:82px 1fr 40px;gap:12px;padding:24px 15px}.focus-number{font-size:28px}.focus-main{padding-right:12px}.focus-main h2{font-size:18px}.focus-main p{display:none}.focus-steps{gap:8px}.focus-steps span{font-size:10px}.mastery-section{width:calc(100% + 8px);margin-right:-4px;padding:30px 14px 16px}.mastery-heading{gap:18px}.mastery-heading h2{font-size:42px}.diagnostic-console,.mastery-dashboard{min-height:0;padding:19px 15px}.confidence-check,.diagnostic-feedback{flex-direction:column;align-items:flex-start}.confidence-check>div{width:100%}.confidence-check button{flex:1}.diagnostic-options{grid-template-columns:1fr}.diagnostic-feedback>button{width:100%}.diagnostic-actions{flex-direction:column}.protocol-steps{grid-template-columns:1fr 1fr}.protocol-steps article:last-child{grid-column:1/-1}.syllabus-map>div{grid-template-columns:1fr 1fr}.research-strip{grid-template-columns:1fr}.research-strip>div{grid-column:auto}.section-block{padding-top:86px}.section-heading{flex-direction:column;align-items:flex-start;gap:18px}.topic-grid{grid-template-columns:1fr}.topic-card{min-height:250px}.topic-select{height:205px}.topic-formula{min-height:48px;margin-top:12px}.topic-formula .katex{font-size:25px}.active-topic-panel{grid-template-columns:1fr;padding:23px}.active-topic-panel>a{grid-column:auto}.arcade-block{border-radius:13px;width:calc(100% + 8px);margin-right:-4px;padding:45px 14px 25px}.arcade-heading{gap:28px}.arcade-heading h2{font-size:42px}.scoreboard{grid-template-columns:1fr 1fr;width:100%}.scoreboard>div{border-bottom:1px solid #ffffff1f;min-height:72px}.reward-level-top{align-items:flex-start}.mission-heading{flex-direction:column;align-items:flex-start;gap:8px}.mission-card{grid-template-columns:34px 1fr}.mission-card>button{grid-column:1/-1;width:100%}.badge-row{padding-bottom:5px;overflow-x:auto}.badge{flex:none}.arcade-tabs{grid-template-columns:1fr 1fr}.arcade-tabs>button{min-height:135px;padding:14px}.arcade-tabs>button:last-child{grid-column:1/-1}.arcade-arena{min-height:0;padding:24px 16px}.arena-reward{display:none}.arcade-arena>h3{font-size:31px}.arena-options,.arena-options.two-options{grid-template-columns:1fr}.arena-feedback{flex-direction:column;align-items:flex-start}.arena-feedback>button{width:100%}.arena-result h3{font-size:56px}.arena-result>div{flex-direction:column;width:100%}.past-exams-hero{padding:34px 22px}.past-exams-hero h2{font-size:43px}.past-score-card strong{font-size:58px}.past-exam-grid{grid-template-columns:1fr}.past-exam-card{padding:20px 15px}.question-checks{gap:5px}.quiz-card{min-height:0;padding:24px 18px}.quiz-options{grid-template-columns:1fr}.quiz-result>div{font-size:80px}.mistake-card{padding:26px 20px}.resource-row{grid-template-columns:36px 1fr 30px;gap:10px}.resource-tag{display:none}.exam-teaser{grid-template-columns:1fr;gap:28px;padding:32px 24px}.exam-rule{border-top:1px solid #ffffff2e;border-right:0;padding:22px 0 0}.exam-teaser>a{grid-column:auto}footer{flex-direction:column}}@media (width<=920px){.course-horizon,.friends-block{grid-template-columns:1fr}.friends-block{gap:32px}.friends-intro{position:static}.math-lab-heading{grid-template-columns:1fr;gap:22px}.outside-play-grid{grid-template-columns:1fr 1fr}}@media (width<=620px){.course-horizon{padding:26px 20px}.course-chips{grid-template-columns:1fr}.course-chips b.live,.course-chips>a.live{grid-column:auto}.friends-board{box-shadow:5px 5px #e1e7d8}.leaderboard-list li{grid-template-columns:28px 36px 1fr auto 26px;padding-inline:10px}.leader-avatar{width:36px;height:36px}.leaderboard-list label input{width:72px}.add-friend-form{grid-template-columns:1fr 100px}.add-friend-form button{grid-column:1/-1}.invite-strip{grid-template-columns:1fr 38px}.invite-strip>button:not(.refresh-group){grid-area:2/1/auto/-1}.group-form{grid-template-columns:1fr}.group-active-footer{flex-direction:column;align-items:flex-start}.math-lab-block{border-radius:13px;width:calc(100% + 8px);margin-right:-4px;padding:45px 14px 25px}.math-lab-tabs{grid-template-columns:1fr}.math-lab-tabs>button{min-height:88px}.math-lab-game{min-height:0;padding:24px 16px}.math-lab-game>h3{font-size:31px}.lab-game-options{grid-template-columns:1fr}.lab-game-feedback{flex-direction:column;align-items:flex-start}.lab-game-feedback>button{width:100%}.outside-play-head{flex-direction:column;align-items:flex-start;gap:10px}.outside-play-grid{grid-template-columns:1fr}.outside-play-grid a{min-height:185px}}@media (width<=920px){.visual-lab-intro,.concept-workbench{grid-template-columns:1fr}.concept-copy{border-bottom:1px solid #18221f1f;border-left:0}.concept-lesson-tabs{grid-template-columns:1fr 1fr}.session-grid{grid-template-columns:1fr}.session-explainer{min-height:0}}@media (width<=620px){.visual-linear-lab{width:calc(100% + 8px);margin-right:-4px;padding:25px 13px 16px}.visual-lab-intro{gap:17px}.visual-lab-intro h2{font-size:39px}.concept-lesson-tabs{scroll-snap-type:x mandatory;display:flex;overflow-x:auto}.concept-lesson-tabs button{scroll-snap-align:start;min-width:210px}.concept-workbench{min-height:0}.concept-copy{padding:25px 18px}.concept-copy>h3{font-size:35px}.concept-controls.two-col{grid-template-columns:1fr}.concept-canvas{padding:20px 12px}.concept-progress{grid-template-columns:1fr auto}.concept-progress small{grid-column:1/-1}.account-pill b{display:none}.account-pill{padding:5px}.topbar-actions{gap:5px}.course-picker summary{min-width:103px;padding:8px 10px}.course-picker>div{left:auto;right:0}.account-panel{padding:34px 20px 24px}.account-panel h2{font-size:29px}.solution-tools>div{grid-template-columns:1fr 1fr;display:grid}.solution-tools button{border-radius:6px}.session-studio{width:calc(100% + 8px);margin-right:-4px;padding:28px 14px 16px}.session-studio-head{flex-direction:column;align-items:flex-start;gap:20px}.drive-sync-banner{flex-direction:column;align-items:flex-start}.drive-sync-banner nav{justify-content:flex-start}.session-timer{grid-template-columns:1fr 1fr;width:100%}.session-timer>span{grid-area:auto/1/auto/-1;margin:0}.session-levels{grid-template-columns:1fr}.session-levels button{min-height:64px}.session-options{grid-template-columns:1fr}.session-feedback{flex-direction:column;align-items:flex-start}.session-feedback>button{width:100%}.session-question-card>h3{min-height:0}.session-question-meta{flex-direction:column;align-items:flex-start}.zero-lesson-path dl>div{grid-template-columns:1fr;gap:4px}.session-complete>div{flex-direction:column;width:100%}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.diagnostic-console>h3,.session-question-card>h3,.arcade-arena>h3,.quiz-card>h3,.math-lab-game>h3{line-height:1.55}@media (width<=620px){.diagnostic-console>h3,.session-question-card>h3,.arcade-arena>h3,.quiz-card>h3,.math-lab-game>h3{font-size:27px;line-height:1.65}.math-inline .katex{font-size:1em}}