@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;900&family=Outfit:wght@400;600;700;800&display=swap";:root{--bg-dark:#070a12;--bg-card:#121a2fb3;--bg-card-hover:#1c2744d9;--border-color:#ffffff14;--border-active:#00e67666;--primary-jade:#00e676;--primary-jade-glow:#00e67640;--accent-gold:#ffc107;--accent-gold-glow:#ffc1074d;--accent-cyan:#00e5ff;--accent-crimson:#ff3d00;--text-main:#f8fafc;--text-muted:#94a3b8;--text-sub:#cbd5e1;--font-body:"Inter", system-ui, sans-serif;--font-heading:"Outfit", sans-serif;--font-hanzi:"Noto Sans SC", "Kaiti SC", sans-serif;--shadow-glow:0 8px 32px 0 #0000005e;--glass-backdrop:blur(16px) saturate(180%)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);font-family:var(--font-body);background-image:radial-gradient(at 0 0,#00e67614 0,#0000 50%),radial-gradient(at 100% 0,#00e5ff14 0,#0000 50%),radial-gradient(at 50% 100%,#ffc1070d 0,#0000 50%);background-attachment:fixed;min-height:100vh;line-height:1.5;overflow-x:hidden}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0f172a99}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary-jade)}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;width:100%;max-width:1280px;margin:0 auto;padding:2rem 1.5rem}.glass-card{background:var(--bg-card);-webkit-backdrop-filter:var(--glass-backdrop);border:1px solid var(--border-color);box-shadow:var(--shadow-glow);border-radius:20px;transition:all .3s cubic-bezier(.4,0,.2,1)}.glass-card:hover{border-color:#ffffff2e;transform:translateY(-2px)}.hanzi-text{font-family:var(--font-hanzi);letter-spacing:.05em;font-weight:700}.pinyin-text{font-family:var(--font-body);color:var(--accent-gold);font-weight:600}.viet-phonetic{color:var(--accent-cyan);background:#00e5ff1a;border-radius:6px;padding:2px 8px;font-size:.9em;display:inline-block}.btn-primary{color:#070a12;cursor:pointer;box-shadow:0 4px 15px var(--primary-jade-glow);background:linear-gradient(135deg,#00e676 0%,#00b0ff 100%);border:none;border-radius:12px;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-weight:700;transition:all .2s;display:inline-flex}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00e67666}.btn-primary:active{transform:scale(.98)}.btn-secondary{color:var(--text-main);border:1px solid var(--border-color);cursor:pointer;background:#ffffff0f;border-radius:12px;align-items:center;gap:.5rem;padding:.75rem 1.25rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:#ffffff1f;border-color:#ffffff40}.btn-mic{color:#fff;cursor:pointer;background:linear-gradient(135deg,#ff3d00 0%,#ffc107 100%);border:none;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;transition:all .3s;display:flex;position:relative;box-shadow:0 0 25px #ff3d0080}.btn-mic.recording{background:linear-gradient(135deg,#ff1744 0%,#d50000 100%);animation:1.5s infinite pulseMic}@keyframes pulseMic{0%{transform:scale(1);box-shadow:0 0 #ff1744b3}50%{transform:scale(1.08);box-shadow:0 0 0 20px #ff174400}to{transform:scale(1);box-shadow:0 0 #ff174400}}.wave-container{justify-content:center;align-items:center;gap:4px;height:36px;display:flex}.wave-bar{background:var(--primary-jade);border-radius:4px;width:4px;animation:1.2s ease-in-out infinite alternate soundWave}.wave-bar:first-child{height:12px;animation-delay:.1s}.wave-bar:nth-child(2){height:24px;animation-delay:.3s}.wave-bar:nth-child(3){height:32px;animation-delay:.2s}.wave-bar:nth-child(4){height:20px;animation-delay:.4s}.wave-bar:nth-child(5){height:28px;animation-delay:.15s}@keyframes soundWave{0%{transform:scaleY(.3)}to{transform:scaleY(1.3)}}.score-circle{border:6px solid var(--primary-jade);width:140px;height:140px;box-shadow:0 0 30px var(--primary-jade-glow);background:radial-gradient(circle,#0f172ae6 60%,#0000 100%);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;margin:0 auto;display:flex;position:relative}.score-value{font-family:var(--font-heading);background:linear-gradient(135deg,#00e676,#00e5ff);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:2.8rem;font-weight:800;line-height:1}.score-label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-top:4px;font-size:.75rem}.category-pill{border:1px solid var(--border-color);color:var(--accent-gold);background:#ffffff14;border-radius:20px;padding:4px 12px;font-size:.8rem;font-weight:600}.nav-tabs{border:1px solid var(--border-color);background:#0f172acc;border-radius:16px;gap:.5rem;padding:6px;display:flex}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:12px;align-items:center;gap:.5rem;padding:.6rem 1.25rem;font-size:.95rem;font-weight:600;transition:all .2s;display:flex}.tab-btn.active{background:var(--primary-jade);color:#070a12;box-shadow:0 4px 12px var(--primary-jade-glow)}.char-feedback-box{flex-wrap:wrap;justify-content:center;gap:6px;margin:1rem 0;display:flex}.char-badge{font-family:var(--font-hanzi);border:2px solid #0000;border-radius:10px;justify-content:center;align-items:center;width:46px;height:46px;font-size:1.8rem;font-weight:700;transition:all .2s;display:flex}.char-badge.correct{color:#00e676;background:#00e67626;border-color:#00e676}.char-badge.missing{color:#ff3d00;opacity:.7;background:#ff3d0026;border-color:#ff3d00;text-decoration:line-through}.grid-days{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.25rem;display:grid}@media (width<=768px){.main-content{padding:1rem}.nav-tabs{width:100%;overflow-x:auto}.tab-btn{white-space:nowrap;padding:.5rem .85rem;font-size:.85rem}}