:root{--ac-ink:#102b36;--ac-teal:#0a827c;--ac-gold:#d2a96e;--ac-bg:#f0f6f5;--ac-line:#d8e7e3;--ac-radius:22px}*{box-sizing:border-box}.academyBody{background:var(--ac-bg);color:var(--ac-ink);margin:0;font-family:system-ui,"Noto Sans Thai",sans-serif}.academyNav{height:74px;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 clamp(18px,4vw,60px);border-bottom:1px solid var(--ac-line)}.academyBrand{display:flex;align-items:center;gap:8px;font-weight:900;color:#075e5d;text-decoration:none;font-size:21px}.academyBrand small{font-size:10px;letter-spacing:2px;color:#b58b50}.academyNav nav{display:flex;gap:18px}.academyNav a{color:var(--ac-ink);text-decoration:none}.academyMain{max-width:1640px;margin:auto;padding:clamp(15px,2vw,32px)}.academyHero{background:linear-gradient(117deg,#112f3d,#075a5c);color:#fff;border-radius:28px;padding:clamp(24px,4vw,56px);display:flex;justify-content:space-between;gap:28px;align-items:center}.academyEyebrow{color:#16a49c;letter-spacing:2px;font-size:11px;font-weight:900}.academyHero .academyEyebrow{color:#efd7a4}.academyHero h1{font-size:clamp(28px,3vw,48px);line-height:1.25;margin:12px 0}.academyHero h1 em{color:#e0ba81;font-style:normal}.academyHero p{max-width:640px;color:#c9e1df}.academySummary{display:grid;grid-template-columns:repeat(3,minmax(95px,1fr));gap:10px;min-width:330px}.academySummary>div{background:#ffffff14;border:1px solid #ffffff30;border-radius:18px;padding:16px;text-align:center}.academySummary b{font-size:32px;display:block}.academySummary span{font-size:12px;color:#d4e9e6}.academyWorkspace{margin-top:22px;display:grid;grid-template-columns:minmax(260px,330px) minmax(0,1fr);gap:20px;align-items:start}.academyCourse,.academyPractice{background:#fff;border:1px solid var(--ac-line);border-radius:var(--ac-radius);box-shadow:0 10px 38px #123a4210;min-width:0}.academyCourse{padding:20px}.academyTitle h2{margin:6px 0}.academyTitle p{font-size:13px;color:#6b8088}.academyLessons{display:grid;gap:8px;max-height:800px;overflow:auto;padding:4px}.academyLesson{border:1px solid var(--ac-line);background:#f8fbfa;border-radius:12px;padding:10px 12px;display:flex;align-items:center;gap:12px;width:100%;text-align:left;color:var(--ac-ink);cursor:pointer}.academyLesson:hover,.academyLesson.active{border-color:var(--ac-teal);background:#edf9f6}.academyLessonNo{width:32px;height:32px;flex:none;border-radius:10px;background:#e1eeea;display:grid;place-items:center;font-weight:800}.academyLesson.active .academyLessonNo{background:var(--ac-teal);color:#fff}.academyLessonName{font-weight:700;font-size:13px}.academyLessonMeta{font-size:11px;color:#66817f}.academyPractice{padding:20px}.academyPracticeHead{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px}.academyPracticeHead h2{margin:4px 0}.academyPracticeHead p{margin:0;font-size:13px;color:#627881}.academyExercise{display:grid;grid-template-columns:minmax(0,1fr) minmax(235px,290px);gap:18px;align-items:start}.academyCanvasWrap{min-width:0;background:#e1b778;border-radius:16px;padding:12px;box-shadow:inset 0 0 0 2px #c89b5c}.academyCanvasWrap canvas{display:block;width:100%;height:auto;aspect-ratio:1;touch-action:manipulation;cursor:crosshair}.academyTouch{font-size:12px;color:#66461d;text-align:center;margin:8px 0 0}.academyAside{display:flex;flex-direction:column;gap:10px;min-width:0}.academyAside h3{margin:0}.academyAside p{line-height:1.7;margin:0}.academyFeedback,.academyExplanation{background:#eff8f6;border:1px solid #d7eae6;border-radius:12px;padding:12px;line-height:1.6;font-size:13px}.academyExplanation{background:#fff9ed;border-color:#e8d4a9}.academyPrimary,.academyGhost{border-radius:12px;padding:12px 15px;cursor:pointer;font:inherit;min-height:44px}.academyPrimary{border:0;color:#fff;background:var(--ac-teal);font-weight:800}.academyPrimary:disabled{opacity:.5;cursor:not-allowed}.academyGhost{background:#fff;border:1px solid var(--ac-line);color:var(--ac-ink)}.academyAlert{background:#fff2df;border:1px solid #e8bb74;border-radius:12px;padding:15px;margin-top:15px}.academyPractice:fullscreen{width:100vw;height:100dvh;max-height:100dvh;overflow:hidden;border-radius:0;padding:12px;display:flex;flex-direction:column}.academyPractice:fullscreen .academyPracticeHead{flex:none}.academyPractice:fullscreen .academyExercise{flex:1;min-height:0;grid-template-columns:minmax(0,1fr) minmax(230px,320px);align-items:stretch}.academyPractice:fullscreen .academyCanvasWrap{width:min(100%,calc(100dvh - 140px));height:min(100%,calc(100dvh - 140px));margin:auto;display:flex;flex-direction:column;justify-content:center}.academyPractice:fullscreen .academyCanvasWrap canvas{height:100%;width:100%;min-height:0;object-fit:contain}.academyPractice:fullscreen .academyAside{overflow:auto;min-height:0}.academyPractice.academyPseudoFull{position:fixed;inset:0;z-index:1000;width:100%;height:100dvh;overflow:hidden;border-radius:0;padding:12px;display:flex;flex-direction:column}.academyPseudoFull .academyExercise{min-height:0;flex:1}.academyPseudoFull .academyAside{overflow:auto}.academyPseudoFull .academyCanvasWrap{width:min(100%,calc(100dvh - 150px));margin:auto}@media(max-width:1050px){.academyWorkspace{grid-template-columns:1fr}.academyLessons{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));max-height:240px}.academyLesson{gap:5px;flex-direction:column;text-align:center}.academyLessonMeta{font-size:10px}}@media(max-width:680px){.academyNav{height:60px}.academyNav nav{gap:10px;font-size:12px}.academyBrand{font-size:15px}.academyBrand small{display:none}.academyHero{flex-direction:column;align-items:stretch}.academySummary{min-width:0}.academySummary b{font-size:23px}.academyExercise{grid-template-columns:1fr}.academyLessons{grid-template-columns:repeat(2,minmax(0,1fr));max-height:235px}.academyCourse,.academyPractice{padding:12px}.academyPractice:fullscreen .academyExercise,.academyPseudoFull .academyExercise{display:flex;flex-direction:column;gap:6px}.academyPractice:fullscreen .academyCanvasWrap,.academyPseudoFull .academyCanvasWrap{width:min(100%,calc(100dvh - 345px));height:auto;flex:none}.academyPractice:fullscreen .academyAside,.academyPseudoFull .academyAside{overflow:auto;flex:1}.academyPractice:fullscreen .academyTouch,.academyPseudoFull .academyTouch{display:none}}[hidden]{display:none!important}