:root{--act-teal: #0d9488;--act-teal-dark: #0f766e;--act-teal-light: #ccfbf1;--act-teal-soft: #f0fdfa;--act-orange: #f97316;--act-orange-dark: #ea580c;--act-orange-light: #ffedd5;--act-amber: #f59e0b;--act-amber-soft: #fffbeb;--act-green: #16a34a;--act-green-soft: #dcfce7;--act-coral: #e11d48;--act-coral-soft: #ffe4e6;--act-ink: #1e293b;--act-muted: #475569;--act-border: #cbd5e1;--act-surface: #ffffff}.act-host{font-family:Nunito,Quicksand,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--act-ink);font-size:18px;line-height:1.55;max-width:820px;margin:0 auto}.act-host-header{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px}.act-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;font-size:14px;font-weight:700;background:var(--act-teal-light);color:var(--act-teal-dark)}.act-badge--tech{background:var(--act-orange-light);color:var(--act-orange-dark)}.act-objective{margin:0 0 14px;font-size:16px;color:var(--act-muted);font-weight:600}.act-card{background:var(--act-surface);border:3px solid #e2e8f0;border-radius:22px;padding:24px;box-shadow:0 8px 24px #0f172a0f}.act-prompt{font-size:21px;font-weight:700;margin:0 0 18px;color:var(--act-ink)}.act-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:20px}.act-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 22px;border-radius:14px;border:2px solid transparent;font-family:inherit;font-size:17px;font-weight:700;cursor:pointer;transition:transform .14s ease,background-color .14s ease,box-shadow .14s ease}.act-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.act-btn:not(:disabled):hover{transform:translateY(-1px)}.act-btn:not(:disabled):active{transform:translateY(1px)}.act-btn--primary{background:var(--act-teal);color:#fff;box-shadow:0 4px 0 var(--act-teal-dark)}.act-btn--primary:not(:disabled):hover{background:#0f766e}.act-btn--accent{background:var(--act-orange);color:#fff;box-shadow:0 4px 0 var(--act-orange-dark)}.act-btn--accent:not(:disabled):hover{background:var(--act-orange-dark)}.act-btn--ghost{background:#f8fafc;color:var(--act-ink);border-color:var(--act-border)}.act-btn--ghost:not(:disabled):hover{background:#f1f5f9}.act-btn--hint{background:var(--act-amber-soft);color:#92400e;border-color:#fcd34d;min-height:42px;padding:8px 16px;font-size:15px}.act-hint-box{margin-top:14px;padding:14px 18px;border-radius:16px;background:var(--act-amber-soft);border:2px dashed #f59e0b;color:#78350f;font-size:17px;animation:act-fade-in .2s ease}.act-feedback{margin-top:18px;padding:16px 20px;border-radius:18px;border:2px solid;font-size:18px}.act-feedback--correct{background:var(--act-green-soft);border-color:#4ade80;color:#14532d;animation:act-pop .35s ease}.act-feedback--wrong{background:var(--act-amber-soft);border-color:#fb923c;color:#7c2d12;animation:act-nudge .35s ease}.act-feedback-title{font-weight:800;font-size:19px;margin-bottom:4px}.act-feedback-exp{margin:6px 0 0;font-size:17px}.act-error-inline{margin-top:12px;padding:12px 16px;border-radius:14px;background:var(--act-coral-soft);color:#881337;font-size:16px;font-weight:600}.act-quiz-img{display:block;max-width:100%;max-height:260px;margin:0 auto 18px;border-radius:16px;border:2px solid #e2e8f0;object-fit:contain}.act-quiz-options{display:grid;gap:12px}.act-quiz-option{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:14px 18px;border-radius:16px;border:3px solid #e2e8f0;background:#f8fafc;color:var(--act-ink);font-family:inherit;font-size:18px;font-weight:600;cursor:pointer;transition:border-color .15s ease,background-color .15s ease,transform .12s ease}.act-quiz-option:hover{border-color:#5eead4;background:var(--act-teal-soft)}.act-quiz-option--selected{border-color:var(--act-teal);background:var(--act-teal-light)}.act-quiz-letter{flex:0 0 36px;height:36px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;background:#fff;border:2px solid #cbd5e1;color:var(--act-teal-dark)}.act-quiz-option--selected .act-quiz-letter{background:var(--act-teal);border-color:var(--act-teal);color:#fff}.act-match-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:620px){.act-match-grid{grid-template-columns:1fr}}.act-match-col{display:flex;flex-direction:column;gap:10px}.act-match-col-title{font-size:15px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:var(--act-muted);margin-bottom:4px}.act-match-item{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;padding:13px 16px;border-radius:16px;border:3px solid #e2e8f0;background:#f8fafc;color:var(--act-ink);font-family:inherit;font-size:17px;font-weight:600;cursor:pointer}.act-match-item--active{border-color:var(--act-orange);background:var(--act-orange-light)}.act-pair-tag{flex-shrink:0;padding:2px 10px;border-radius:999px;font-size:14px;font-weight:800;color:#fff}.act-order-list{display:flex;flex-direction:column;gap:10px;list-style:none;padding:0;margin:0}.act-order-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:16px;border:2px solid #cbd5e1;background:#f8fafc;cursor:grab}.act-order-num{flex:0 0 34px;height:34px;border-radius:50%;background:var(--act-teal);color:#fff;font-weight:800;display:inline-flex;align-items:center;justify-content:center}.act-order-text{flex:1;font-weight:600}.act-order-arrows{display:flex;gap:6px}.act-icon-btn{min-width:40px;min-height:40px;border-radius:10px;border:2px solid #cbd5e1;background:#fff;font-size:18px;font-weight:800;cursor:pointer}.act-icon-btn:disabled{opacity:.35;cursor:not-allowed}.act-fill-sentence{font-size:21px;font-weight:700;line-height:1.7;padding:16px 18px;border-radius:16px;background:var(--act-teal-soft);border:2px solid #99f6e4;margin-bottom:16px}.act-fill-blank{display:inline-block;min-width:110px;padding:2px 12px;margin:0 4px;border-bottom:3px solid var(--act-orange);background:#fff;border-radius:8px;color:var(--act-orange-dark);text-align:center}.act-input{width:100%;box-sizing:border-box;padding:13px 16px;font-family:inherit;font-size:19px;font-weight:600;border-radius:14px;border:3px solid #cbd5e1;color:var(--act-ink);background:#fff}.act-input:focus{outline:none;border-color:var(--act-teal)}.act-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.act-chip{padding:10px 18px;border-radius:999px;border:2px solid #cbd5e1;background:#fff;font-family:inherit;font-size:17px;font-weight:700;cursor:pointer}.act-chip--active{background:var(--act-orange-light);border-color:var(--act-orange);color:var(--act-orange-dark)}.act-cipher-clues{display:flex;flex-direction:column;gap:16px}.act-cipher-row{padding:14px 16px;border-radius:16px;background:#f8fafc;border:2px solid #e2e8f0}.act-cipher-clue-text{font-weight:700;margin-bottom:10px}.act-letter-boxes{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.act-letter-box{width:38px;height:42px;border-radius:10px;border:2px solid #cbd5e1;background:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;text-transform:uppercase}.act-letter-box--key{border-color:var(--act-orange);background:var(--act-amber-soft);color:var(--act-orange-dark);box-shadow:0 0 0 2px #fed7aa}.act-cipher-keyword{margin-top:20px;padding:18px;border-radius:18px;background:var(--act-amber-soft);border:2px solid #fbbf24}.act-flash-nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px}.act-flash-dots{display:flex;flex-wrap:wrap;gap:8px}.act-flash-dot{min-width:38px;height:38px;border-radius:12px;border:2px solid #cbd5e1;background:#fff;font-family:inherit;font-weight:800;cursor:pointer}.act-flash-dot--current{border-color:var(--act-teal);background:var(--act-teal-light)}.act-flash-dot--rated{border-color:var(--act-green);background:var(--act-green-soft);color:#166534}.act-flash-card{border:3px solid #5eead4;border-radius:22px;padding:26px 20px;text-align:center;background:linear-gradient(180deg,#f0fdfa,#fff);margin-bottom:18px}.act-flash-word{font-size:32px;font-weight:900;color:var(--act-teal-dark);margin:0}.act-flash-phonetic{font-size:18px;color:var(--act-muted);margin:6px 0 0}.act-flash-meaning{font-size:26px;font-weight:800;color:var(--act-orange-dark);margin:0}.act-flash-example{margin:10px 0 0;font-size:18px;font-style:italic;color:var(--act-muted)}.act-flash-controls{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:16px}.act-stars{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.act-star-btn{min-height:48px;padding:10px 16px;border-radius:14px;border:2px solid #cbd5e1;background:#fff;font-family:inherit;font-size:16px;font-weight:700;cursor:pointer}.act-star-btn--active{border-color:#f59e0b;background:#fef3c7;color:#92400e}.act-dialogue-situation{padding:12px 16px;border-radius:14px;background:var(--act-teal-soft);border:2px solid #99f6e4;font-weight:700;margin-bottom:16px}.act-dialogue-turns{display:flex;flex-direction:column;gap:12px}.act-bubble{max-width:85%;padding:14px 18px;border-radius:18px;border:2px solid #e2e8f0;background:#f8fafc}.act-bubble--alt{align-self:flex-end;background:var(--act-orange-light);border-color:#fdba74}.act-bubble-speaker{font-size:14px;font-weight:800;color:var(--act-teal-dark);margin-bottom:4px}.act-bubble--alt .act-bubble-speaker{color:var(--act-orange-dark)}.act-dialogue-choices{display:grid;gap:8px;margin-top:10px}.act-outline-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}@media(max-width:680px){.act-outline-grid{grid-template-columns:1fr}}.act-outline-box{padding:12px 14px;border-radius:14px;background:#f8fafc;border:2px solid #e2e8f0;font-size:16px}.act-outline-title{font-weight:800;color:var(--act-teal-dark);margin-bottom:4px}.act-textarea{width:100%;box-sizing:border-box;min-height:150px;padding:14px 16px;font-family:inherit;font-size:18px;line-height:1.6;border-radius:16px;border:3px solid #cbd5e1;resize:vertical}.act-textarea:focus{outline:none;border-color:var(--act-teal)}.act-word-count{margin-top:8px;font-size:16px;font-weight:700;color:var(--act-muted)}.act-word-count--ok{color:var(--act-green)}.act-cat-review{margin-top:14px;padding:14px 18px;border-radius:16px;background:var(--act-teal-soft);border:2px solid #5eead4}.act-maze-layout{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start}@media(max-width:720px){.act-maze-layout{grid-template-columns:1fr}}.act-maze-grid{display:grid;gap:4px;padding:10px;border-radius:18px;background:#e2e8f0;width:fit-content}.act-maze-cell{width:52px;height:52px;border-radius:10px;background:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;position:relative;-webkit-user-select:none;user-select:none}.act-maze-cell--start{background:#e0f2fe}.act-maze-cell--goal{background:#fef3c7}.act-maze-cell--obstacle{background:#64748b;color:#fff}.act-maze-cell--trail{background:#ccfbf1}.act-maze-robot{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;background:var(--act-teal);color:#fff;font-size:22px;font-weight:900;box-shadow:0 3px 0 var(--act-teal-dark);transition:transform .18s ease}.act-maze-palette{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.act-maze-program{display:flex;flex-direction:column;gap:8px;min-height:120px;padding:12px;border-radius:16px;background:#f8fafc;border:2px dashed #cbd5e1}.act-maze-block{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;border-radius:12px;background:#fff;border:2px solid #99f6e4;font-weight:700}.act-maze-block--loop{flex-direction:column;align-items:stretch;border-color:#fdba74;background:#fff7ed}.act-maze-loop-body{display:flex;flex-direction:column;gap:6px;padding-left:14px;border-left:3px solid var(--act-orange)}@keyframes act-pop{0%{transform:scale(.96)}50%{transform:scale(1.02)}to{transform:scale(1)}}@keyframes act-nudge{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes act-fade-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.act-feedback--correct,.act-feedback--wrong,.act-hint-box{animation:none}}