:root{--bg-primary: #090a10;--bg-secondary: #0f121d;--bg-tertiary: #171b2b;--bg-card: rgba(23, 27, 43, .7);--bg-card-hover: rgba(30, 36, 56, .85);--bg-glass: rgba(18, 22, 36, .65);--border-subtle: rgba(255, 255, 255, .08);--border-hover: rgba(99, 102, 241, .4);--border-focus: #6366f1;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--brand-primary: #6366f1;--brand-primary-light: #818cf8;--brand-secondary: #06b6d4;--brand-accent: #a855f7;--brand-gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);--brand-gradient-glow: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, .15) 0%, transparent 70%);--color-success: #10b981;--color-success-bg: rgba(16, 185, 129, .12);--color-warning: #f59e0b;--color-warning-bg: rgba(245, 158, 11, .12);--color-danger: #ef4444;--color-danger-bg: rgba(239, 68, 68, .12);--color-info: #38bdf8;--font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", monospace;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--shadow-card: 0 10px 30px -10px rgba(0, 0, 0, .5), 0 0 1px 1px rgba(255, 255, 255, .05);--shadow-glow: 0 0 25px rgba(99, 102, 241, .35);--shadow-glow-cyan: 0 0 25px rgba(6, 182, 212, .35);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .4s cubic-bezier(.16, 1, .3, 1)}*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden;line-height:1.5;background-image:radial-gradient(at 0% 0%,rgba(99,102,241,.08) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(6,182,212,.06) 0px,transparent 50%);background-attachment:fixed}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.glass-panel{background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-card)}.gradient-text{background:var(--brand-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;display:inline-block}.mono{font-family:var(--font-mono)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);font-weight:600;font-size:.95rem;padding:10px 20px;border-radius:var(--radius-md);cursor:pointer;border:1px solid transparent;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.btn-primary{background:var(--brand-gradient);color:#fff;box-shadow:0 4px 15px #6366f159}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f180;filter:brightness(1.1)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-subtle)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-hover);transform:translateY(-2px)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:var(--text-primary);background:#ffffff0d}.btn-danger{background:var(--color-danger-bg);color:#f87171;border-color:#ef44444d}.btn-danger:hover{background:#ef444440}.btn-sm{padding:6px 12px;font-size:.85rem;border-radius:var(--radius-sm)}.btn-lg{padding:14px 28px;font-size:1.05rem;border-radius:var(--radius-lg)}.input-field{width:100%;padding:12px 16px;background:#0f121dcc;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:.95rem;transition:all var(--transition-fast);outline:none}.input-field:focus{border-color:var(--brand-primary-light);box-shadow:0 0 0 3px #6366f133}.input-field::placeholder{color:var(--text-muted)}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;border-radius:var(--radius-full)}.badge-cefr{background:#6366f126;color:var(--brand-primary-light);border:1px solid rgba(99,102,241,.3)}.badge-pro{background:linear-gradient(135deg,#f59e0b,#ec4899);color:#fff;box-shadow:0 2px 10px #f59e0b4d}.badge-success{background:var(--color-success-bg);color:var(--color-success);border:1px solid rgba(16,185,129,.3)}.badge-accent{background:#06b6d426;color:#38bdf8;border:1px solid rgba(6,182,212,.3)}.navbar-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);background:#090a10d9;border-bottom:1px solid var(--border-subtle);padding:12px 24px}.navbar-container{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.logo-group{display:flex;align-items:center;gap:12px;cursor:pointer;text-decoration:none}.logo-icon{width:40px;height:40px;border-radius:var(--radius-md);background:var(--brand-gradient);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:var(--shadow-glow);position:relative}.logo-icon:after{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;border-radius:var(--radius-md);background:var(--brand-gradient);filter:blur(8px);opacity:.5;z-index:-1}.logo-title{font-size:1.35rem;font-weight:800;letter-spacing:-.02em;color:#fff}.nav-links{display:flex;align-items:center;gap:6px;background:#121624b3;padding:4px;border-radius:var(--radius-full);border:1px solid var(--border-subtle)}.nav-link-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;font-size:.88rem;font-weight:600;color:var(--text-secondary);border-radius:var(--radius-full);background:transparent;border:none;cursor:pointer;transition:all var(--transition-fast)}.nav-link-btn:hover{color:var(--text-primary);background:#ffffff0f}.nav-link-btn.active{color:#fff;background:var(--brand-primary);box-shadow:0 2px 10px #6366f166}.user-status-strip{display:flex;align-items:center;gap:16px}.stat-chip{display:flex;align-items:center;gap:6px;background:#ffffff0d;border:1px solid var(--border-subtle);padding:6px 12px;border-radius:var(--radius-full);font-size:.85rem;font-weight:700}.stat-chip.streak{color:#f97316}.stat-chip.xp{color:#a855f7}.app-container{max-width:1300px;margin:0 auto;padding:24px 20px 80px}.avatar-stage-box{position:relative;width:100%;height:420px;background:radial-gradient(circle at 50% 40%,#6366f126,#090a10f2 75%);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 50px #000c}.avatar-ambient-glow{position:absolute;width:320px;height:320px;border-radius:50%;filter:blur(60px);opacity:.35;pointer-events:none;transition:all .5s ease}.transcript-bubble{padding:12px 18px;border-radius:var(--radius-md);margin-bottom:12px;max-width:82%;animation:fadeIn .25s ease-out;line-height:1.5}.transcript-avatar{background:#1e2438d9;border:1px solid rgba(255,255,255,.08);border-top-left-radius:4px;margin-right:auto;color:#f1f5f9}.transcript-user{background:linear-gradient(135deg,#6366f133,#06b6d433);border:1px solid rgba(99,102,241,.4);border-top-right-radius:4px;margin-left:auto;color:#fff}.translatable-word{cursor:pointer;display:inline-block;padding:0 2px;border-radius:3px;transition:background .15s ease}.translatable-word:hover{background:#6366f159;color:#38bdf8;text-decoration:underline dotted}.grammar-correction-card{background:#0f172af2;border:1px solid rgba(239,68,68,.3);border-left:4px solid #ef4444;border-radius:var(--radius-md);padding:12px 16px;margin-top:8px;font-size:.88rem;box-shadow:0 4px 15px #0006}.diff-original{color:#f87171;text-decoration:line-through;margin-right:8px}.diff-corrected{color:#34d399;font-weight:600}.audio-wave-bars{display:flex;align-items:center;gap:3px;height:24px}.audio-wave-bar{width:3px;background:var(--brand-secondary);border-radius:2px;animation:soundWave 1s ease-in-out infinite alternate}.audio-wave-bar:nth-child(1){height:6px;animation-delay:.1s}.audio-wave-bar:nth-child(2){height:16px;animation-delay:.3s}.audio-wave-bar:nth-child(3){height:22px;animation-delay:.2s}.audio-wave-bar:nth-child(4){height:12px;animation-delay:.4s}.audio-wave-bar:nth-child(5){height:8px;animation-delay:.15s}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#05070ccc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s ease-out}.modal-content{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);max-width:600px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-card),0 0 50px #0009;padding:28px;position:relative}.roadmap-container{display:flex;flex-direction:column;align-items:center;gap:28px;position:relative;padding:40px 0}.roadmap-connector-line{position:absolute;top:60px;bottom:60px;width:4px;background:linear-gradient(to bottom,var(--brand-primary),var(--brand-secondary),var(--bg-tertiary));border-radius:2px;z-index:0}.roadmap-node{position:relative;z-index:1;width:72px;height:72px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);border:3px solid var(--border-subtle);cursor:pointer;transition:all var(--transition-fast);box-shadow:var(--shadow-card)}.roadmap-node.active{background:var(--brand-gradient);border-color:#fff;box-shadow:var(--shadow-glow);transform:scale(1.1)}.roadmap-node.locked{opacity:.6;cursor:not-allowed;filter:grayscale(.8)}.roadmap-node:hover:not(.locked){transform:scale(1.15);box-shadow:var(--shadow-glow)}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes soundWave{0%{transform:scaleY(.4)}to{transform:scaleY(1.3)}}@keyframes pulseGlow{0%{transform:scale(.98);opacity:.3}50%{transform:scale(1.05);opacity:.6}to{transform:scale(.98);opacity:.3}}@media(max-width:768px){.navbar-container{flex-wrap:wrap;gap:12px}.nav-links{order:3;width:100%;justify-content:space-around}.avatar-stage-box{height:320px}}