:root{--text:#525252;--text-h:#161616;--text-muted:#6f6f6f;--bg:#fff;--bg-subtle:#f4f4f4;--border:#d1d1d6;--accent:#0072b2;--accent-hover:#005a8c;--accent-light:#0072b214;--accent-mid:#0072b226;--success:#009e73;--warning:#e69f00;--error:#d55e00;--progress:#0072b2;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font:16px/1.5 system-ui,-apple-system,sans-serif}@media (prefers-color-scheme:dark){:root{--text:#c6c6c6;--text-h:#f4f4f4;--text-muted:#8d8d8d;--bg:#161616;--bg-subtle:#262626;--border:#393939;--accent:#78a9ff;--accent-hover:#a6c8ff;--accent-light:#78a9ff1a;--accent-mid:#78a9ff2e;--success:#42be65;--warning:#f1c21b;--error:#fa4d56;--progress:#78a9ff}}*{box-sizing:border-box}body{margin:0}h1,h2,h3{color:var(--text-h);font-weight:600}.app{flex-direction:column;max-width:600px;min-height:100vh;margin:0 auto;padding:20px;display:flex}.app.loading,.app.error{justify-content:center;align-items:center;font-size:18px}.module-info{margin-bottom:32px}.module-info h1{margin:0 0 4px;font-size:28px}.module-title-native{color:var(--text-muted);margin-bottom:16px;font-size:22px}.module-context{color:var(--text-muted);margin-bottom:24px;font-size:14px}.cultural-notes{text-align:left;background:var(--bg-subtle);border-radius:8px;margin-top:16px;padding:16px 20px}.cultural-notes h3{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin:0 0 8px;font-size:14px}.cultural-notes ul{margin:0;padding-left:20px}.cultural-notes li{margin-bottom:4px;font-size:14px;line-height:1.5}.start-button,.restart-button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:14px 32px;font-size:18px;font-weight:600;transition:background .2s}.start-button:hover,.restart-button:hover{background:var(--accent-hover)}.complete-actions{flex-direction:column;align-items:center;gap:10px;display:flex}.menu-button{border:1px solid var(--border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:6px;padding:10px 24px;font-size:14px;transition:border-color .2s,color .2s}.menu-button:hover{border-color:var(--accent);color:var(--accent)}.drill-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:20px;padding:8px 0;display:flex}.drill-header-controls{align-items:center;gap:8px;display:flex}.drill-back-btn{border:1px solid var(--border);cursor:pointer;width:28px;height:26px;color:var(--text-muted);background:0 0;border-radius:4px;margin-right:10px;padding:0;font-size:18px;line-height:1;transition:border-color .2s,color .2s}.drill-back-btn:hover{border-color:var(--accent);color:var(--accent)}.audio-mode-btn{border:1px solid var(--border);cursor:pointer;color:var(--text-muted);background:0 0;border-radius:4px;padding:2px 8px;font-size:11px;transition:border-color .2s,color .2s}.audio-mode-btn:hover{border-color:var(--accent);color:var(--accent)}.audio-speed-btn{border:1px solid var(--border);cursor:pointer;color:var(--text-muted);font-variant-numeric:tabular-nums;background:0 0;border-radius:4px;padding:2px 8px;font-size:11px;font-weight:600;transition:border-color .2s,color .2s,background .2s}.audio-speed-btn:hover{border-color:var(--accent);color:var(--accent)}.audio-speed-btn.fast,.audio-speed-btn.slow{border-color:var(--accent);color:var(--text-h);background:var(--bg-subtle)}.chime-toggle-btn{border:1px solid var(--border);cursor:pointer;width:24px;height:22px;color:var(--text-muted);background:0 0;border-radius:4px;padding:0;font-size:14px;line-height:1;transition:border-color .2s,color .2s,opacity .2s}.chime-toggle-btn:hover{border-color:var(--accent);color:var(--accent)}.chime-toggle-btn.off{opacity:.55}.module-name{color:var(--text-h);font-size:14px;font-weight:600}.language-tag{background:var(--bg-subtle);color:var(--text-muted);border-radius:4px;padding:2px 8px;font-family:monospace;font-size:12px}.phase-header{margin-bottom:24px}.phase-progress{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:4px;font-size:12px}.phase-header h2{margin:0;font-size:20px}.phase-title-native{color:var(--text-muted);font-size:16px}.prompt-display{background:var(--bg-subtle);text-align:center;border-radius:12px;margin-bottom:16px;padding:24px}.prompt-intent{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:12px;font-size:13px}.prompt-text-group{flex-direction:column;justify-content:center;gap:4px;min-height:80px;display:flex}.prompt-text{color:var(--text-h);font-size:32px;font-weight:600;line-height:1.3}.prompt-romanization{color:var(--text-muted);font-family:monospace;font-size:16px}.prompt-meaning{color:var(--text-muted);font-size:14px;font-style:italic}.prompt-register{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);opacity:.6;margin-top:4px;font-size:11px}.prompt-hidden-text{color:var(--text-muted);padding:20px 0;font-size:18px;font-style:italic}.audio-controls{justify-content:center;margin-bottom:8px;display:flex}.replay-btn{border:2px solid var(--accent);color:var(--accent);cursor:pointer;background:0 0;border-radius:24px;align-items:center;gap:6px;padding:10px 24px;font-size:15px;font-weight:500;transition:background .2s,transform .1s;display:flex}.replay-btn:hover{background:var(--accent-light)}.replay-btn:active{transform:scale(.96)}.replay-btn.playing{background:var(--accent-light)}.replay-btn svg{fill:currentColor;width:18px;height:18px}.audio-placeholder{text-align:center;color:var(--text-muted);margin-bottom:8px;padding:12px;font-size:14px;font-style:italic}.text-toggle{text-align:center;margin-bottom:24px}.show-text-button{border:1px solid var(--border);cursor:pointer;color:var(--text);background:0 0;border-radius:6px;padding:6px 16px;font-size:13px;transition:border-color .2s}.show-text-button:hover{border-color:var(--accent);color:var(--accent)}.response-buttons{margin-top:auto;padding-bottom:20px}.response-label{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:12px;font-size:13px}.response-button{border:2px solid var(--border);cursor:pointer;text-align:left;background:0 0;border-radius:10px;align-items:flex-start;width:100%;margin-bottom:8px;padding:14px 18px;transition:border-color .2s,background .2s;display:flex}.response-button:hover{border-color:var(--accent);background:var(--accent-light)}.response-button:active{background:var(--accent-mid)}.response-button.wrong{border-color:var(--error);opacity:.55;cursor:default;background:#d55e0014;animation:.32s response-wrong-shake}.response-button.wrong:hover{border-color:var(--error);background:#d55e0014}@keyframes response-wrong-shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@media (prefers-reduced-motion:reduce){.response-button.wrong{animation:none}}.response-content{flex-direction:column;flex:1;display:flex}.response-text{color:var(--text-h);font-size:20px;font-weight:500}.response-meaning{color:var(--text-muted);margin-top:2px;font-size:13px}.response-action{color:var(--text-muted);opacity:.7;margin-top:4px;font-size:11px;font-style:italic}.response-play-btn{border:1px solid var(--border);cursor:pointer;width:32px;height:32px;color:var(--text-muted);background:0 0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;margin-left:12px;transition:color .2s,border-color .2s;display:flex}.response-play-btn:hover,.response-play-btn.playing{color:var(--accent);border-color:var(--accent)}.response-play-btn svg{fill:currentColor;width:14px;height:14px}.tree-header{border-bottom:1px solid var(--border);align-items:center;gap:12px;margin-bottom:20px;padding-bottom:12px;display:flex}.tree-header h2{margin:0;font-size:18px}.back-button{border:1px solid var(--border);cursor:pointer;color:var(--text);background:0 0;border-radius:6px;padding:4px 12px;font-size:14px;transition:border-color .2s}.back-button:hover{border-color:var(--accent);color:var(--accent)}.tree-map-title{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin:0 0 16px;font-size:13px}.tree-flow{flex-direction:column;align-items:center;display:flex}.tree-node-group{flex-direction:column;align-items:center;width:100%;display:flex}.tree-node{border:2px solid var(--border);cursor:pointer;text-align:left;background:0 0;border-radius:10px;align-items:center;gap:12px;width:100%;padding:12px 16px;transition:border-color .2s,background .2s;display:flex}.tree-node:hover{border-color:var(--accent);background:var(--accent-light)}.tree-node.practiced{border-color:var(--success)}.tree-node.edge-case{opacity:.8;border-style:dashed;margin-bottom:6px}.tree-node-number{background:var(--bg-subtle);width:28px;height:28px;color:var(--text-muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.tree-node.practiced .tree-node-number{background:var(--success);color:#fff}.tree-node-content{flex-direction:column;flex:1;display:flex}.tree-node-title{color:var(--text-h);font-size:15px;font-weight:500}.tree-node-title-native{color:var(--text-muted);font-size:13px}.tree-node-meta{color:var(--text-muted);opacity:.7;margin-top:2px;font-size:11px}.tree-node-check{color:var(--success);font-size:18px;font-weight:700}.quiz-accuracy{font-weight:600}.quiz-accuracy.high{color:var(--success)}.quiz-accuracy.mid{color:var(--warning)}.quiz-accuracy.low{color:var(--error)}.tree-connector{background:var(--border);width:2px;height:20px}.tree-edge-cases{border-top:1px solid var(--border);margin-top:24px;padding-top:16px}.tree-edge-title{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin:0 0 12px;font-size:12px}.start-actions{flex-direction:column;align-items:center;gap:12px;display:flex}.tree-button{border:1px solid var(--border);cursor:pointer;color:var(--text);background:0 0;border-radius:8px;padding:10px 24px;font-size:15px;transition:border-color .2s,color .2s}.tree-button:hover{border-color:var(--accent);color:var(--accent)}.module-library{padding:8px 0 24px}.library-header{margin-bottom:24px}.library-header h1{margin:0 0 4px;font-size:28px}.library-sub{color:var(--text-muted);margin:0;font-size:14px}.library-grid{flex-direction:column;gap:12px;display:flex}.library-card{text-align:left;border:1px solid var(--border);width:100%;color:var(--text);cursor:pointer;background:0 0;border-radius:10px;padding:16px 20px;transition:border-color .2s,background .2s,transform .12s;display:block}.library-card:hover{border-color:var(--accent);background:var(--bg-subtle);transform:translateY(-1px)}.library-card-title-row{justify-content:space-between;align-items:center;gap:10px;display:flex}.library-card-title{color:var(--text-h);font-size:18px;font-weight:600}.library-card-lang{background:var(--bg-subtle);color:var(--text-muted);border-radius:4px;padding:2px 8px;font-family:monospace;font-size:11px}.library-card:hover .library-card-lang{background:var(--border)}.library-card-native{color:var(--text-muted);margin-top:2px;font-size:15px}.library-card-context{color:var(--text-muted);margin-top:8px;font-size:13px;line-height:1.4}.library-card-stats{color:var(--text-muted);text-transform:uppercase;letter-spacing:.4px;flex-wrap:wrap;gap:10px;margin-top:12px;font-size:11px;display:flex}.library-card-edge{color:var(--accent);font-weight:600}.start-library-nav{margin-bottom:12px}.happy-path-preview{margin:20px 0}.start-audio-controls{color:var(--text-muted);justify-content:flex-end;align-items:center;gap:8px;margin:-12px 2px 20px;font-size:11px;display:flex}.start-audio-controls-label{text-transform:uppercase;letter-spacing:.04em}.happy-path-btn{border:1px solid var(--border);width:100%;color:var(--text);cursor:pointer;text-align:left;background:0 0;border-radius:10px;align-items:center;gap:14px;padding:14px 18px;transition:border-color .2s,background .2s;display:flex}.happy-path-btn:hover,.happy-path-btn.playing{border-color:var(--accent);background:var(--bg-subtle)}.happy-path-icon{background:var(--accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;display:inline-flex}.happy-path-label{flex-direction:column;gap:2px;min-width:0;display:flex}.happy-path-title{color:var(--text-h);font-size:14px;font-weight:600}.happy-path-sub{color:var(--text-muted);font-size:11px}.happy-path-speed{color:var(--accent);font-variant-numeric:tabular-nums;font-weight:600}.happy-path-segments{align-items:stretch;gap:2px;height:28px;margin-top:8px;padding:0 2px;display:flex}.happy-path-segment{background:var(--bg-subtle);min-width:18px;color:var(--text-muted);cursor:pointer;font-variant-numeric:tabular-nums;border:1px solid #0000;border-radius:4px;padding:0;font-size:10px;font-weight:600;line-height:1;transition:background .15s,color .15s,border-color .15s,transform .1s;position:relative}.happy-path-segment:hover{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.happy-path-segment-officer{background:#0072b22e}.happy-path-segment-learner{background:#e69f0038}.happy-path-segment.active{background:var(--accent);border-color:var(--accent);color:#fff;transform:scaleY(1.08)}.happy-path-segment-learner.active{background:var(--warning);border-color:var(--warning)}.happy-path-segment-num{pointer-events:none;display:inline-block}@media (prefers-reduced-motion:reduce){.happy-path-segment,.happy-path-segment.active{transition:none;transform:none}}.daily-practice-summary{background:var(--bg-subtle);border:1px solid var(--border);border-radius:10px;margin:20px 0;padding:16px 20px}.daily-practice-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.daily-practice-title{text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);font-size:12px;font-weight:600}.daily-practice-mastered-tag{background:var(--accent);color:#fff;letter-spacing:.3px;border-radius:10px;padding:2px 8px;font-size:11px;font-weight:600}.daily-practice-stats{justify-content:space-around;gap:20px;display:flex}.daily-stat{flex-direction:column;flex:1 1 0;align-items:center;min-width:0;display:flex}.daily-stat-value{color:var(--text-h);font-size:28px;font-weight:700;line-height:1.1}.daily-stat-denom{color:var(--text-muted);font-size:16px;font-weight:500}.daily-stat-label{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-top:4px;font-size:11px}.daily-stat-sub{color:var(--text-muted);opacity:.8;margin-top:2px;font-size:11px}.advanced-mode-toggle{border:1px dashed var(--border);cursor:pointer;color:var(--text-muted);background:0 0;border-radius:8px;align-items:center;gap:10px;padding:8px 16px;font-size:13px;transition:border-color .2s,color .2s,background .2s;display:inline-flex}.advanced-mode-toggle:hover{border-color:var(--accent);color:var(--text)}.advanced-mode-toggle.on{border-style:solid;border-color:var(--accent);color:var(--text);background:var(--bg-subtle)}.advanced-mode-toggle .advanced-mode-state{letter-spacing:.5px;background:var(--bg-subtle);color:var(--text-muted);border-radius:3px;padding:2px 6px;font-size:11px;font-weight:700}.advanced-mode-toggle.on .advanced-mode-state{background:var(--accent);color:#fff}.advanced-mode-badge,.edge-case-badge{letter-spacing:.5px;vertical-align:middle;border-radius:3px;margin-left:8px;padding:1px 6px;font-size:9px;font-weight:700;display:inline-block}.advanced-mode-badge{background:var(--accent);color:#fff}.edge-case-badge{color:#fff;background:#e3a008}.comprehension-quiz{margin-top:auto;padding-bottom:20px}.quiz-label{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);align-items:center;gap:10px;margin-bottom:12px;font-size:13px;display:flex}.quiz-mode-badge{background:var(--accent);color:#fff;letter-spacing:.5px;text-transform:uppercase;border-radius:3px;padding:2px 6px;font-size:10px}.quiz-options{flex-direction:column;gap:8px;display:flex}.quiz-option{border:2px solid var(--border);cursor:pointer;text-align:left;width:100%;color:var(--text-h);background:0 0;border-radius:10px;padding:14px 18px;font-size:15px;transition:border-color .2s,background .2s}.quiz-option:hover:not(:disabled){border-color:var(--accent);background:var(--accent-light)}.quiz-option.correct{border-color:var(--success);color:var(--success);cursor:default;background:#009e731a;justify-content:space-between;align-items:center;gap:12px;display:flex;position:relative}.quiz-option.celebrate{animation:.55s ease-out quiz-correct-pulse;box-shadow:0 0 #009e7373}.quiz-option .quiz-checkmark{background:var(--success);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;animation:.5s cubic-bezier(.2,1.4,.4,1) 80ms forwards quiz-check-pop;display:inline-flex;transform:scale(0)}@keyframes quiz-correct-pulse{0%{transform:scale(1);box-shadow:0 0 #009e7373}40%{transform:scale(1.025);box-shadow:0 0 0 10px #009e732e}to{transform:scale(1);box-shadow:0 0 #009e7300}}@keyframes quiz-check-pop{0%{transform:scale(0)rotate(-20deg)}70%{transform:scale(1.15)rotate(0)}to{transform:scale(1)rotate(0)}}@media (prefers-reduced-motion:reduce){.quiz-option.celebrate{animation:none}.quiz-option .quiz-checkmark{animation:none;transform:scale(1)}}.quiz-option.wrong{border-color:var(--error);color:var(--error);opacity:.6;cursor:default;background:#d55e0014}.module-complete{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;display:flex}.module-complete h2{margin:0;font-size:28px}.complete-title{color:var(--text-muted);font-size:16px}.session-summary{text-align:left;background:var(--bg-subtle);border-radius:10px;width:100%;max-width:400px;margin:8px auto 12px;padding:16px 20px}.session-summary h3{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin:0 0 12px;font-size:13px}.session-accuracy{align-items:baseline;gap:8px;margin-bottom:12px;display:flex}.session-accuracy-value{color:var(--text-h);font-size:32px;font-weight:700}.session-accuracy-label{color:var(--text-muted);font-size:13px}.session-phases{flex-direction:column;gap:4px;display:flex}.session-phase-row{justify-content:space-between;align-items:center;padding:4px 0;font-size:13px;display:flex}.session-phase-name{color:var(--text)}.session-phase-pct{font-weight:600}.session-phase-pct.high{color:var(--success)}.session-phase-pct.mid{color:var(--warning)}.session-phase-pct.low{color:var(--error)}.progress-bar{flex-direction:column;gap:10px;width:100%;max-width:400px;margin:16px auto;display:flex}.progress-stat{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.progress-label{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);text-align:left;flex:1;font-size:12px}.progress-value{color:var(--text-h);font-size:13px;font-weight:600}.progress-track{background:var(--border);border-radius:3px;width:100%;height:6px;overflow:hidden}.progress-fill{background:var(--progress);border-radius:3px;height:100%;transition:width .3s}.feedback-fab{color:#fff;background:var(--accent);cursor:pointer;z-index:90;border:none;border-radius:999px;align-items:center;gap:6px;padding:8px 14px;font-size:12px;font-weight:600;transition:background .2s,transform .1s,box-shadow .2s;display:inline-flex;position:fixed;bottom:16px;right:16px;box-shadow:0 4px 14px #0000002e}.feedback-fab:hover{background:var(--accent-hover);box-shadow:0 6px 18px #00000038}.feedback-fab:active{transform:translateY(1px)}.feedback-fab-label{line-height:1}@media (width<=480px){.feedback-fab{padding:10px;bottom:12px;right:12px}.feedback-fab-label{display:none}}.feedback-backdrop{z-index:100;background:#00000073;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.feedback-sheet{background:var(--bg);border:1px solid var(--border);border-radius:12px;width:100%;max-width:480px;max-height:90vh;padding:20px 22px;overflow-y:auto;box-shadow:0 12px 40px #0000004d}.feedback-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.feedback-title{color:var(--text-h);margin:0;font-size:18px}.feedback-close-x{border:1px solid var(--border);width:28px;height:28px;color:var(--text-muted);cursor:pointer;background:0 0;border-radius:6px;padding:0;font-size:22px;line-height:1}.feedback-close-x:hover{border-color:var(--accent);color:var(--accent)}.feedback-form{flex-direction:column;gap:14px;display:flex}.feedback-field{flex-direction:column;gap:6px;display:flex}.feedback-label{color:var(--text-h);text-transform:uppercase;letter-spacing:.04em;font-size:12px;font-weight:600}.feedback-form textarea,.feedback-form input[type=text],.feedback-form input[type=email]{width:100%;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);resize:vertical;border-radius:8px;padding:10px 12px}.feedback-form textarea:focus,.feedback-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);outline:none}.feedback-form textarea[aria-invalid=true],.feedback-form input[aria-invalid=true]{border-color:var(--error)}.feedback-checkbox{background:var(--bg-subtle);border:1px solid var(--border);cursor:pointer;border-radius:8px;align-items:flex-start;gap:10px;padding:10px 12px;display:flex}.feedback-checkbox input[type=checkbox]{flex-shrink:0;margin-top:2px}.feedback-checkbox-body{flex-direction:column;gap:4px;min-width:0;display:flex}.feedback-checkbox-label{color:var(--text-h);font-size:13px;font-weight:600}.feedback-checkbox-note{color:var(--text-muted);font-size:11px;line-height:1.45}.feedback-identity{background:var(--bg-subtle);border:1px dashed var(--border);border-radius:8px;flex-direction:column;gap:12px;padding:12px;display:flex}.feedback-error{color:var(--error);font-size:12px}.feedback-actions{justify-content:flex-end;gap:10px;margin-top:4px;display:flex}.feedback-cancel,.feedback-submit{cursor:pointer;border-radius:8px;padding:10px 18px;font-size:14px;font-weight:600;transition:background .15s,border-color .15s,color .15s}.feedback-cancel{border:1px solid var(--border);color:var(--text);background:0 0}.feedback-cancel:hover{border-color:var(--accent);color:var(--accent)}.feedback-submit{background:var(--accent);border:1px solid var(--accent);color:#fff}.feedback-submit:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.feedback-submit:disabled{opacity:.6;cursor:not-allowed}.feedback-success{flex-direction:column;align-items:flex-start;gap:16px;padding:8px 0 4px;display:flex}.feedback-success p{color:var(--text-h);margin:0;font-size:15px}