@import"https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&display=swap";.progress-bar{width:100%;height:8px;background:#334155;border-radius:4px;margin:20px 0 8px;overflow:hidden}.progress-bar .fill{height:100%;background:linear-gradient(90deg,#e17055,#fdcb6e);border-radius:4px;transition:width .5s}.progress-text{text-align:center;color:#94a3b8;font-size:.85em;margin-bottom:28px}.exercise{background:#1e293b;border:2px solid #334155;border-radius:16px;padding:28px 28px 24px;margin-bottom:20px;transition:border-color .3s,box-shadow .3s;box-shadow:0 4px 24px #0000004d}.exercise.correct{border-color:#4ade80;box-shadow:0 0 16px #4ade801a}.exercise.incorrect{border-color:#f87171;box-shadow:0 0 16px #f871711a}.exercise-header{display:flex;align-items:center;gap:12px;margin-bottom:18px}.exercise-num{background:#e17055;color:#fff;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;flex-shrink:0}.exercise.correct .exercise-num{background:#4ade80;color:#0f172a}.exercise.incorrect .exercise-num{background:#f87171;color:#0f172a}.exercise-tag{font-size:.7rem;text-transform:uppercase;letter-spacing:1.5px;color:#fab1a0;background:#fab1a01a;padding:4px 12px;border-radius:20px;border:1px solid rgba(250,177,160,.2);margin-left:auto;font-weight:600}.exercise-prompt{font-size:1.2rem;font-weight:600;color:#e2e8f0;margin-bottom:20px;font-family:Fira Code,monospace;line-height:1.7;padding:12px 16px;background:#ffffff05;border-radius:10px;border:1px solid rgba(255,255,255,.04)}.answer-row{display:flex;gap:12px;align-items:stretch}.answer-input{flex:1;padding:14px 18px;background:#ffffff0d;border:2px solid #475569;border-radius:12px;color:#e2e8f0;font-family:Fira Code,monospace;font-size:1.05rem;transition:border-color .2s,box-shadow .2s;outline:none}.answer-input::placeholder{color:#64748b;font-style:italic}.answer-input:focus{border-color:#e17055;box-shadow:0 0 0 3px #e1705526}.answer-input.correct{border-color:#4ade80;background:#4ade8014;box-shadow:0 0 0 3px #4ade801a}.answer-input.incorrect{border-color:#f87171;background:#f8717114;box-shadow:0 0 0 3px #f871711a}.answer-input:disabled{opacity:.6}.check-btn{background:linear-gradient(135deg,#e17055,#d63031);color:#fff;border:none;padding:14px 28px;border-radius:12px;cursor:pointer;font-family:inherit;font-weight:700;font-size:.95rem;transition:all .2s;white-space:nowrap;letter-spacing:.3px;box-shadow:0 2px 8px #e170554d}.check-btn:hover{filter:brightness(1.1);transform:translateY(-2px);box-shadow:0 4px 16px #e1705566}.check-btn:disabled{opacity:.4;cursor:default;transform:none;filter:none;box-shadow:none}.exercise-feedback{margin-top:20px;padding:20px 24px;border-radius:12px;display:none;line-height:1.7;font-size:.92em}.exercise-feedback.show{display:block}.exercise-feedback.correct{background:#4ade800f;border:1px solid rgba(74,222,128,.15);border-left:4px solid #4ade80}.exercise-feedback.incorrect{background:#f871710f;border:1px solid rgba(248,113,113,.15);border-left:4px solid #f87171}.exercise-feedback .fb-verdict{font-weight:700;font-size:1.1em;margin-bottom:10px}.exercise-feedback.correct .fb-verdict{color:#4ade80}.exercise-feedback.incorrect .fb-verdict{color:#f87171}.exercise-feedback .fb-answer{color:#fdcb6e;font-family:Fira Code,monospace;font-weight:600;margin-bottom:12px;font-size:1.05em}.exercise-feedback .fb-steps{color:#94a3b8;padding-left:0;list-style:none;counter-reset:fbstep}.exercise-feedback .fb-steps li{counter-increment:fbstep;margin-bottom:8px;padding-left:32px;position:relative;line-height:1.6}.exercise-feedback .fb-steps li:before{content:counter(fbstep);position:absolute;left:0;background:#334155;color:#e2e8f0;width:22px;height:22px;border-radius:50%;text-align:center;line-height:22px;font-size:.75em;font-weight:700;top:1px}:root{--primary: #E17055;--primary-light: #FAB1A0;--primary-dark: #D63031;--accent: #FDCB6E;--accent-light: #7c6327;--bg: #0f172a;--card: #1e293b;--text: #e2e8f0;--text-muted: #94a3b8;--success: #4ade80;--warning: #fbbf24;--info: #74B9FF;--error: #f87171;--border: #334155;--shadow: 0 4px 24px rgba(0,0,0,.3);--radius: 16px}.hero[data-astro-cid-b6zw2exn]{background:linear-gradient(135deg,#0f172a,#6c2e1a,#0f172a);color:#fff;padding:80px 24px 60px;text-align:center;position:relative;overflow:hidden}.hero[data-astro-cid-b6zw2exn]:before{content:"sin θ";position:absolute;font-size:200px;font-weight:700;opacity:.07;top:-20px;right:-30px;font-family:Fira Code,monospace}.hero[data-astro-cid-b6zw2exn] h1[data-astro-cid-b6zw2exn]{font-size:3rem;font-weight:700;margin-bottom:12px}.hero[data-astro-cid-b6zw2exn] p[data-astro-cid-b6zw2exn]{font-size:1.2rem;opacity:.9;max-width:600px;margin:0 auto}.nav-bar[data-astro-cid-b6zw2exn]{background:#1e293b;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px #0000004d;overflow-x:auto}.nav-inner[data-astro-cid-b6zw2exn]{display:flex;max-width:1100px;margin:0 auto;padding:0 16px;gap:4px}.nav-inner[data-astro-cid-b6zw2exn] button[data-astro-cid-b6zw2exn]{padding:14px 18px;background:none;border:none;color:var(--text-muted);font-size:.9rem;font-weight:500;white-space:nowrap;border-bottom:3px solid transparent;transition:all .2s;cursor:pointer;font-family:inherit}.nav-inner[data-astro-cid-b6zw2exn] button[data-astro-cid-b6zw2exn]:hover,.nav-inner[data-astro-cid-b6zw2exn] button[data-astro-cid-b6zw2exn].active{color:var(--primary-light);border-bottom-color:var(--primary)}.container[data-astro-cid-b6zw2exn]{max-width:900px;margin:0 auto;padding:40px 24px}.section[data-astro-cid-b6zw2exn]{margin-bottom:60px;display:none}.section[data-astro-cid-b6zw2exn].active{display:block}.section-number[data-astro-cid-b6zw2exn]{display:inline-block;background:var(--primary);color:#fff;width:36px;height:36px;border-radius:50%;text-align:center;line-height:36px;font-weight:700;font-size:.95rem;margin-right:12px;vertical-align:middle}.section-title[data-astro-cid-b6zw2exn]{font-size:1.8rem;font-weight:700;color:var(--primary-light);margin-bottom:8px;display:inline;vertical-align:middle}.section-subtitle[data-astro-cid-b6zw2exn]{font-size:1rem;color:var(--text-muted);margin-bottom:28px;margin-top:6px}.card[data-astro-cid-b6zw2exn]{background:var(--card);border-radius:var(--radius);padding:28px 32px;margin-bottom:24px;box-shadow:var(--shadow);border-left:4px solid var(--primary)}.card[data-astro-cid-b6zw2exn].accent{border-left-color:var(--accent)}.card[data-astro-cid-b6zw2exn].success{border-left-color:var(--success)}.card[data-astro-cid-b6zw2exn].info{border-left-color:var(--info)}.card[data-astro-cid-b6zw2exn].warning{border-left-color:var(--warning)}.card[data-astro-cid-b6zw2exn].error{border-left-color:var(--error)}.card[data-astro-cid-b6zw2exn] h3[data-astro-cid-b6zw2exn]{font-size:1.15rem;font-weight:600;margin-bottom:12px;color:var(--primary-light)}.card[data-astro-cid-b6zw2exn].accent h3[data-astro-cid-b6zw2exn]{color:#fdcb6e}.card[data-astro-cid-b6zw2exn].success h3[data-astro-cid-b6zw2exn]{color:#4ade80}.card[data-astro-cid-b6zw2exn].info h3[data-astro-cid-b6zw2exn]{color:#74b9ff}.card[data-astro-cid-b6zw2exn].warning h3[data-astro-cid-b6zw2exn]{color:#fbbf24}.def-box[data-astro-cid-b6zw2exn]{background:linear-gradient(135deg,#6c2e1a,#4a2010);border-radius:12px;padding:20px 24px;margin:16px 0;border:1px solid var(--border)}.def-box[data-astro-cid-b6zw2exn] .label[data-astro-cid-b6zw2exn]{font-size:.75rem;text-transform:uppercase;letter-spacing:1px;color:var(--primary-light);font-weight:700;margin-bottom:6px}.def-box[data-astro-cid-b6zw2exn] p[data-astro-cid-b6zw2exn]{font-size:1rem}.formula[data-astro-cid-b6zw2exn]{background:#1e1e2e;color:#cdd6f4;font-family:Fira Code,monospace;padding:18px 24px;border-radius:10px;margin:16px 0;font-size:1.05rem;text-align:center;letter-spacing:.5px}.formula[data-astro-cid-b6zw2exn] .hl[data-astro-cid-b6zw2exn]{color:#fab1a0;font-weight:600}.formula[data-astro-cid-b6zw2exn] .accent[data-astro-cid-b6zw2exn]{color:#fdcb6e}.example[data-astro-cid-b6zw2exn]{background:#1a1a2e;border-radius:12px;padding:20px 24px;margin:16px 0;border:1px solid #3d3a50}.example[data-astro-cid-b6zw2exn] .tag[data-astro-cid-b6zw2exn]{display:inline-block;background:#e17055;color:#fff;padding:2px 10px;border-radius:20px;font-size:.75rem;font-weight:600;margin-bottom:10px}.steps[data-astro-cid-b6zw2exn]{counter-reset:step;margin:16px 0}.step[data-astro-cid-b6zw2exn]{display:flex;gap:16px;margin-bottom:16px;align-items:flex-start}.step[data-astro-cid-b6zw2exn]:before{counter-increment:step;content:counter(step);background:var(--primary);color:#fff;width:28px;height:28px;min-width:28px;border-radius:50%;text-align:center;line-height:28px;font-weight:700;font-size:.85rem}.rule-list[data-astro-cid-b6zw2exn]{list-style:none;padding:0;margin:12px 0}.rule-list[data-astro-cid-b6zw2exn] li[data-astro-cid-b6zw2exn]{padding:12px 16px;margin-bottom:8px;background:#e1705514;border-radius:10px;border-left:3px solid var(--primary);line-height:1.7}.rule-list[data-astro-cid-b6zw2exn] li[data-astro-cid-b6zw2exn] strong[data-astro-cid-b6zw2exn]{color:var(--primary-light)}.canvas-container[data-astro-cid-b6zw2exn]{background:#1a1a2e;border-radius:12px;padding:20px;margin:16px 0;border:1px solid #3d3a50;text-align:center}.canvas-container[data-astro-cid-b6zw2exn] canvas[data-astro-cid-b6zw2exn]{max-width:100%;cursor:pointer}.canvas-info[data-astro-cid-b6zw2exn]{display:flex;justify-content:center;gap:24px;margin-top:12px;flex-wrap:wrap}.canvas-info[data-astro-cid-b6zw2exn] .val[data-astro-cid-b6zw2exn]{font-family:Fira Code,monospace;font-size:1rem;color:var(--text)}.canvas-info[data-astro-cid-b6zw2exn] .val[data-astro-cid-b6zw2exn] strong[data-astro-cid-b6zw2exn]{color:var(--primary-light)}.score-display[data-astro-cid-b6zw2exn]{text-align:center;padding:30px;background:linear-gradient(135deg,#e1705526,#fdcb6e1a);border-radius:16px;border:2px solid var(--primary);margin:28px 0}.score-display[data-astro-cid-b6zw2exn] .score[data-astro-cid-b6zw2exn]{font-size:3em;font-weight:700;color:var(--primary-light)}.btn[data-astro-cid-b6zw2exn]{background:var(--primary);color:#fff;border:none;padding:12px 24px;border-radius:10px;cursor:pointer;font-family:inherit;font-weight:600;font-size:.9em;transition:all .2s}.btn[data-astro-cid-b6zw2exn]:hover{filter:brightness(1.1);transform:translateY(-1px)}.btn[data-astro-cid-b6zw2exn].secondary{background:var(--card);color:var(--text);border:1px solid var(--border)}.btn[data-astro-cid-b6zw2exn].secondary:hover{border-color:var(--primary)}
