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var(--transition-speed)}.stat-card.clickable:hover{background:var(--surface-hover);border-color:var(--accent)}.stat-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.stat-value{font-size:24px;font-weight:700}.stat-value.accent{color:var(--accent)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(220px,100%),1fr));gap:12px;margin-bottom:24px;padding:16px;min-width:0}.card-grid-single{display:grid;grid-template-columns:1fr;gap:12px;margin-bottom:24px;padding:16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:16px 20px;cursor:pointer;transition:background-color var(--transition-speed),border-color var(--transition-speed),transform .2s;animation:slideUp .35s ease-out both}.card[data-tilt]{transform:perspective(600px) translateY(-2px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));transform-style:preserve-3d;will-change:transform;transition:transform .5s ease-out,background-color var(--transition-speed),border-color var(--transition-speed)}.card[data-tilt].tilt-active{box-shadow:0 0 0 1px var(--card-accent, var(--accent)),0 12px 32px color-mix(in srgb,var(--card-accent, var(--accent)) 25%,transparent);transition:transform .05s linear,background-color var(--transition-speed),border-color var(--transition-speed)}.card:hover{background:var(--surface-hover);border-color:var(--card-accent, var(--accent));box-shadow:0 0 0 1px var(--card-accent, var(--accent)),0 8px 24px color-mix(in srgb,var(--card-accent, var(--accent)) 25%,transparent);transform:translateY(-2px)}.card[data-tilt]:hover{transform:perspective(600px) translateY(-2px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg))}.card.card-complete{border-color:var(--correct);background:var(--correct-bg)}.card.card-complete:hover{border-color:var(--correct)}.fill-complete{background:var(--correct)!important}.card-title{font-size:16px;font-weight:600;margin-bottom:6px}.card-progress{font-size:13px;color:var(--text-muted);margin-bottom:8px}.section-title{font-size:16px;font-weight:600;margin-bottom:12px}.footer{text-align:center;color:var(--text-muted);font-size:13px;padding:20px 0 8px;border-top:1px solid var(--border);margin-top:auto}.footer-version{font-size:11px;opacity:.5;margin-top:8px}.footer-links{margin-bottom:8px}.footer-sep{margin:0 6px;opacity:.4}.footer a{color:var(--accent);text-decoration:none;font-weight:500;transition:color var(--transition-speed)}.footer a:hover{color:var(--accent-hover);text-decoration:underline}.footer-donate{font-size:12px;color:var(--text-muted);line-height:1.6}.donate-link{display:inline-block;margin-top:4px;padding:4px 14px;border:1px solid var(--border);border-radius:6px;font-size:12px;transition:background-color var(--transition-speed),border-color var(--transition-speed)}.donate-link:hover{background:var(--surface-hover);border-color:var(--accent)}.practice-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;flex-wrap:wrap;gap:8px}.practice-controls{display:flex;align-items:center;gap:12px}.font-size-controls{display:flex;gap:4px}.font-btn{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:4px 10px;font-size:13px;font-weight:600;color:var(--text);cursor:pointer;transition:background-color var(--transition-speed),border-color var(--transition-speed)}.font-btn:hover{background:var(--surface-hover);border-color:var(--accent)}.practice-meta{font-size:13px;color:var(--text-muted)}.practice-meta span{margin-right:12px}.practice-subtopic{color:var(--accent);font-weight:500}.timer{font-size:14px;color:var(--text-muted);font-variant-numeric:tabular-nums}.timer-display{font-size:16px;font-weight:600;color:var(--text-muted);font-variant-numeric:tabular-nums;min-width:60px;text-align:right}.theme-toggle{position:fixed;top:16px;left:16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:8px 12px;cursor:pointer;font-size:18px;color:var(--text);transition:background-color var(--transition-speed),color var(--transition-speed);z-index:100}.theme-toggle:hover{background:var(--surface-hover)}.practice-screen #app{padding-bottom:50px}:root{--transition-speed: .3s;--bg: #0d1117;--surface: #161b22;--surface-hover: #1c2333;--text: #e6edf3;--text-muted: #8b949e;--border: #30363d;--correct: #3fb950;--correct-bg: rgba(63,185,80,.15);--incorrect: #f85149;--incorrect-bg: rgba(248,81,73,.15);--input-bg: #0d1117;--input-border: #30363d;--shadow: rgba(0,0,0,.3);--warning: #d29922;--warning-bg: rgba(210,153,34,.15);--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 10px;--radius-xl: 14px;--radius-2xl: 16px}body.theme-dark{--accent: #fb923c;--accent-hover: #fdba74}body.theme-light{--bg: #ffffff;--surface: #f6f8fa;--surface-hover: #eaeef2;--text: #1f2328;--text-muted: #656d76;--border: #d0d7de;--correct: #1a7f37;--correct-bg: rgba(26,127,55,.1);--incorrect: #cf222e;--incorrect-bg: rgba(207,34,46,.1);--input-bg: #ffffff;--input-border: #d0d7de;--shadow: rgba(0,0,0,.08);--warning: #9a6700;--warning-bg: rgba(154,103,0,.1);--accent: #ea580c;--accent-hover: #c2410c}.auth-screen{display:flex;align-items:center;justify-content:center;min-height:80vh;padding:20px}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px;width:100%;max-width:360px;text-align:center}.auth-card h2{font-size:24px;margin-bottom:4px}.auth-subtitle{color:var(--text-muted);font-size:14px;margin-bottom:24px}.auth-input{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:8px;background:var(--input-bg, var(--bg));color:var(--text);font-size:15px;font-family:inherit;outline:none;margin-bottom:12px}.auth-input:focus{border-color:var(--accent)}.auth-btn{width:100%;margin-bottom:8px;justify-content:center}.auth-switch{margin-top:16px;font-size:13px;color:var(--text-muted)}.auth-switch a{color:var(--accent);text-decoration:none}.auth-error{background:var(--incorrect-bg);color:var(--incorrect);padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:12px}.session-list{margin:16px 0}.session-row{display:flex;align-items:center;justify-content:space-between;padding:12px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px}.session-device{font-weight:500;font-size:14px}.session-time{font-size:12px;color:var(--text-muted);margin-top:2px}.back-to-suite{position:fixed;top:16px;left:16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:6px 12px;color:var(--text);text-decoration:none;font-size:13px;z-index:100;transition:background-color var(--transition-speed)}.back-to-suite:hover{background:var(--surface-hover)}@media (max-width: 600px){.back-to-suite{position:static;display:inline-block;margin-bottom:12px}}.card-locked{opacity:.7;cursor:not-allowed}.card-locked:hover{border-color:var(--border)!important;transform:none!important}.topic-lock{font-size:14px;margin-left:4px}.topic-free{display:inline-block;padding:2px 8px;border-radius:10px;font-size:10px;font-weight:700;background:#3fb95033;color:var(--correct);margin-left:6px;vertical-align:middle}.practice-container{display:flex;flex-direction:column;gap:20px;padding-bottom:60px}.practice-header{display:flex;align-items:center;justify-content:space-between}.practice-counter{font-size:14px;color:var(--text-muted)}.ground-truth{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px;font-size:20px;font-weight:500;line-height:1.6;text-align:center;animation:fadeIn .3s ease-out}.controls-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.mic-btn{width:72px;height:72px;border-radius:50%;border:3px solid var(--border);background:var(--surface);color:var(--text);font-size:28px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.mic-btn:hover{border-color:var(--accent);background:var(--surface-hover)}.mic-btn.recording{border-color:var(--incorrect);background:var(--incorrect-bg);animation:pulse 1s infinite}@keyframes pulse{0%,to{box-shadow:0 0 #f8514966}50%{box-shadow:0 0 0 12px #f8514900}}.stt-result{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;animation:fadeIn .3s ease-out}.stt-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.stt-text{font-size:16px;line-height:1.6}.word-correct{color:var(--correct);background:var(--correct-bg);padding:1px 4px;border-radius:3px}.word-incorrect{color:var(--incorrect);background:var(--incorrect-bg);padding:1px 4px;border-radius:3px;text-decoration:line-through}.word-missing{color:var(--warning);background:var(--warning-bg);padding:1px 4px;border-radius:3px}.word-extra{color:var(--incorrect);background:var(--incorrect-bg);padding:1px 4px;border-radius:3px;font-style:italic}.stt-text .word-correct{color:var(--correct);background:var(--correct-bg);padding:1px 3px;border-radius:3px}.stt-text .word-incorrect{color:var(--incorrect);background:var(--incorrect-bg);padding:1px 3px;border-radius:3px;text-decoration:line-through}.stt-text .word-missing{color:var(--warning);background:var(--warning-bg);padding:1px 3px;border-radius:3px}.stt-text .word-extra{color:var(--incorrect);background:var(--incorrect-bg);padding:1px 3px;border-radius:3px;font-style:italic}.score-display{text-align:center;padding:16px}.score-value{font-size:48px;font-weight:700;line-height:1}.score-label{font-size:13px;color:var(--text-muted);margin-top:4px}.nav-row{display:flex;justify-content:space-between;align-items:center}.settings-group{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:16px}.settings-label{font-size:14px;font-weight:600;margin-bottom:12px}.radio-group{display:flex;flex-direction:column;gap:8px}.radio-option{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:background-color var(--transition-speed),border-color var(--transition-speed)}.radio-option:hover{background:var(--surface-hover)}.radio-option.selected{border-color:var(--accent);background:#58a6ff1a}.radio-dot{width:18px;height:18px;border-radius:50%;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0}.radio-option.selected .radio-dot{border-color:var(--accent)}.radio-option.selected .radio-dot:after{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}.radio-text{font-size:14px}.radio-desc{font-size:12px;color:var(--text-muted)}.loading{text-align:center;padding:40px;color:var(--text-muted)}.grid-layout{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-bottom:24px}.grid-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px;cursor:pointer;transition:background-color var(--transition-speed),border-color var(--transition-speed),transform .15s;animation:slideUp .35s ease-out both}.grid-card:hover{background:var(--surface-hover);border-color:var(--accent);transform:translateY(-1px)}.grid-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.grid-card-level{font-size:20px;font-weight:700;color:var(--accent)}.grid-card-count{font-size:11px;color:var(--text-muted);background:var(--bg);padding:2px 6px;border-radius:4px}.grid-card-name{font-size:12px;color:var(--text-muted);margin-bottom:4px}.grid-card-foot{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--text-muted);margin-top:6px}.stats-row{display:flex;gap:12px;margin-bottom:24px}.stats-row .stat-card{flex:1;min-width:0}.diff-list{display:flex;flex-direction:column;gap:6px;margin-bottom:24px}.diff-row{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:background-color var(--transition-speed),border-color var(--transition-speed),transform .15s;animation:slideUp .35s ease-out both}.diff-row:hover{background:var(--surface-hover);border-color:var(--accent);transform:translate(4px)}.diff-row.completed{border-color:var(--correct)}.diff-row.completed .diff-icon{color:var(--correct)}.diff-row-left{display:flex;align-items:center;gap:10px}.diff-icon{font-size:14px;min-width:20px;text-align:center}.diff-name{font-size:14px;font-weight:500}.diff-row-right{display:flex;align-items:center;gap:12px}.diff-count{font-size:12px;color:var(--text-muted);white-space:nowrap}.stats-section{margin-bottom:24px}.section-title{font-size:14px;font-weight:600;margin-bottom:8px}.stats-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:10px}.stats-table{width:100%;border-collapse:collapse;font-size:13px}.stats-table th{background:var(--surface);padding:10px 14px;text-align:left;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);border-bottom:1px solid var(--border)}.stats-table td{padding:10px 14px;border-bottom:1px solid var(--border)}.stats-table tr:last-child td{border-bottom:none}.stats-table tbody tr:hover{background:var(--surface-hover)}@media (max-width: 600px){.practice-container{padding-left:10px;padding-right:10px;overflow-x:hidden}.controls-row,.nav-row{flex-wrap:wrap;gap:8px}.ground-truth{overflow-x:auto;word-break:break-word}.screen-header{flex-wrap:wrap}}