:root{--color-navy: #0a0b10;--color-steel: #64748b;--color-violet: #8b5cf6;--color-cyan: #06b6d4;--color-indigo: #6366f1;--color-orange: var(--color-violet);--color-gold: var(--color-cyan);--color-gray-dark: #161827;--color-gray-mid: #0a0b10;--color-blue-gray: #312e81;--color-black: #030712;--color-cream: #f8fafc;--bg-primary: #0a0b10;--bg-secondary: #12131e;--bg-card: rgba(22, 24, 39, .6);--bg-card-hover: rgba(33, 36, 61, .65);--bg-input: rgba(13, 15, 26, .8);--bg-overlay: rgba(10, 11, 16, .96);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--text-heading: #f8fafc;--border-color: rgba(255, 255, 255, .08);--border-focus: var(--color-violet);--accent-primary: var(--color-violet);--accent-secondary: var(--color-cyan);--accent-blue: var(--color-indigo);--accent-primary-hover-bg: rgba(139, 92, 246, .1);--accent-primary-hover-bg-intense: rgba(139, 92, 246, .2);--accent-primary-hover-border: rgba(139, 92, 246, .3);--accent-secondary-hover-bg: rgba(6, 182, 212, .1);--accent-secondary-hover-border: rgba(6, 182, 212, .3);--badge-primary-bg: rgba(139, 92, 246, .15);--badge-primary-border: rgba(139, 92, 246, .25);--badge-secondary-bg: rgba(6, 182, 212, .15);--badge-secondary-border: rgba(6, 182, 212, .25);--dropzone-glow: radial-gradient(ellipse at center, rgba(139, 92, 246, .05) 0%, transparent 70%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .6);--shadow-md: 0 12px 32px rgba(0, 0, 0, .7);--shadow-lg: 0 24px 64px rgba(0, 0, 0, .8);--shadow-glow: 0 0 32px rgba(139, 92, 246, .25);--shadow-glow-gold: 0 0 32px rgba(6, 182, 212, .15);--font-display: "Outfit", system-ui, sans-serif;--font-body: "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--text-5xl: 3rem;--text-6xl: 3.75rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-24: 6rem;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--transition-theme: background-color .3s ease, color .3s ease, border-color .3s ease, box-shadow .3s ease;--gradient-primary: linear-gradient(135deg, var(--color-indigo) 0%, var(--color-cyan) 100%);--gradient-hero: linear-gradient(135deg, #0a0b10 0%, #0f111a 50%, #151829 100%);--gradient-card: linear-gradient(135deg, rgba(22, 24, 39, .75) 0%, rgba(33, 36, 61, .4) 100%);--gradient-text: linear-gradient(135deg, var(--color-violet), var(--color-cyan))}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: rgba(255, 255, 255, .85);--bg-card-hover: rgba(255, 255, 255, 1);--bg-input: rgba(255, 255, 255, .95);--bg-overlay: rgba(248, 250, 252, .97);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--text-heading: #0f172a;--border-color: rgba(15, 23, 42, .08);--border-focus: var(--color-indigo);--accent-primary-hover-bg: rgba(99, 102, 241, .08);--accent-primary-hover-bg-intense: rgba(99, 102, 241, .18);--accent-primary-hover-border: rgba(99, 102, 241, .25);--accent-secondary-hover-bg: rgba(6, 182, 212, .08);--accent-secondary-hover-border: rgba(6, 182, 212, .25);--badge-primary-bg: rgba(99, 102, 241, .1);--badge-primary-border: rgba(99, 102, 241, .25);--badge-secondary-bg: rgba(6, 182, 212, .1);--badge-secondary-border: rgba(6, 182, 212, .25);--dropzone-glow: radial-gradient(ellipse at center, rgba(99, 102, 241, .04) 0%, transparent 70%);--shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);--shadow-md: 0 8px 24px rgba(15, 23, 42, .08);--shadow-lg: 0 16px 48px rgba(15, 23, 42, .12);--shadow-glow: 0 0 24px rgba(139, 92, 246, .12);--gradient-hero: linear-gradient(135deg, #f1f5f9 0%, #f8fafc 50%, #ffffff 100%);--gradient-card: linear-gradient(135deg, rgba(255,255,255,.9) 0%, rgba(241,245,249,.7) 100%)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);transition:var(--transition-theme);min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-blue-gray);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-steel)}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.2;color:var(--text-heading)}h1{font-size:clamp(var(--text-3xl),5vw,var(--text-5xl));font-weight:800}h2{font-size:clamp(var(--text-2xl),3vw,var(--text-4xl))}h3{font-size:clamp(var(--text-xl),2vw,var(--text-2xl))}p{color:var(--text-secondary);line-height:1.7}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-secondary)}code,pre{font-family:var(--font-mono);font-size:.9em}::selection{background:#ff8f1540;color:var(--text-primary)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-6)}.container-sm{width:100%;max-width:720px;margin:0 auto;padding:0 var(--space-6)}.text-gradient{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-2{gap:var(--space-2)}.gap-3{gap:var(--space-3)}.gap-4{gap:var(--space-4)}.gap-6{gap:var(--space-6)}.gap-8{gap:var(--space-8)}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-sm{font-size:var(--text-sm)}.hidden{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.bg-mesh{background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(139,92,246,.08) 0%,transparent 60%),radial-gradient(ellipse 60% 40% at 85% 85%,rgba(6,182,212,.1) 0%,transparent 50%),radial-gradient(ellipse 40% 30% at 15% 75%,rgba(99,102,241,.08) 0%,transparent 50%),var(--gradient-hero)}.navbar{position:sticky;top:0;z-index:100;width:100%;padding:var(--space-4) 0;background:#0a0b10cc;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);transition:var(--transition-theme)}[data-theme=light] .navbar{background:#f8fafcd9}.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.navbar-logo{display:flex;align-items:center;gap:var(--space-3);font-family:var(--font-display);font-size:var(--text-xl);font-weight:800;color:var(--text-primary);text-decoration:none}.navbar-logo .logo-icon{width:36px;height:36px;background:var(--gradient-primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:var(--shadow-glow)}.navbar-logo span em{font-style:normal;background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-actions{display:flex;align-items:center;gap:var(--space-3)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:.75rem 1.5rem;border-radius:var(--radius-md);font-family:var(--font-display);font-size:var(--text-base);font-weight:600;cursor:pointer;border:1px solid transparent;transition:all var(--transition-base);text-decoration:none;white-space:nowrap;position:relative;overflow:hidden;user-select:none}.btn:after{content:"";position:absolute;inset:0;background:#fff0;transition:background var(--transition-fast)}.btn:hover:after{background:#ffffff0f}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-primary);color:#141414;border-color:transparent;box-shadow:var(--shadow-glow),var(--shadow-sm);font-weight:700}.btn-primary:hover{box-shadow:var(--shadow-glow),var(--shadow-md);transform:translateY(-1px)}.btn-secondary{background:transparent;color:var(--text-primary);border-color:var(--border-color);backdrop-filter:blur(8px)}.btn-secondary:hover{border-color:var(--color-steel);background:#5a7c9e1a}.btn-ghost{background:transparent;color:var(--text-secondary);border-color:transparent;padding:.5rem .75rem}.btn-ghost:hover{color:var(--text-primary);background:#5a7c9e1a}.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius-md);background:var(--bg-card);border-color:var(--border-color);color:var(--text-secondary);font-size:var(--text-lg)}.btn-icon:hover{color:var(--text-primary);border-color:var(--color-steel)}.btn-sm{padding:.5rem 1rem;font-size:var(--text-sm);border-radius:var(--radius-sm)}.btn-lg{padding:1rem 2rem;font-size:var(--text-lg);border-radius:var(--radius-lg)}.btn-ripple{position:absolute;border-radius:50%;background:#fff3;width:120px;height:120px;margin-top:-60px;margin-left:-60px;animation:ripple .6s ease-out;pointer-events:none}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--space-6);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);transition:all var(--transition-base);box-shadow:var(--shadow-sm)}.card:hover{border-color:#5a7c9e80;box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-flat{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--space-6);backdrop-filter:blur(16px)}.input-group{display:flex;flex-direction:column;gap:var(--space-2)}.input-label{font-size:var(--text-sm);font-weight:500;color:var(--text-secondary);font-family:var(--font-display)}.input{width:100%;padding:.75rem 1rem;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-body);font-size:var(--text-base);transition:all var(--transition-base);outline:none}.input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px #ff8f151f}.input::placeholder{color:var(--text-muted)}.input-code{font-family:var(--font-mono);font-size:var(--text-3xl);font-weight:700;text-align:center;letter-spacing:.15em;text-transform:uppercase;padding:1.25rem 1.5rem;background:#0a0f1a66;box-shadow:inset 0 2px 8px #00000080;border-radius:var(--radius-lg)}[data-theme=light] .input-code{background:var(--bg-input);box-shadow:inset 0 2px 8px #0000000f}.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:600;font-family:var(--font-display);letter-spacing:.02em}.badge-orange{background:var(--badge-primary-bg);color:var(--color-orange);border:1px solid var(--badge-primary-border)}.badge-blue{background:#5a7c9e26;color:var(--color-steel);border:1px solid rgba(90,124,158,.25)}.badge-green{background:#34d39926;color:#34d399;border:1px solid rgba(52,211,153,.25)}.badge-gold{background:var(--badge-secondary-bg);color:var(--color-gold);border:1px solid var(--badge-secondary-border)}.badge-dot:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.dropzone{position:relative;width:100%;min-height:280px;border:2px dashed var(--border-color);border-radius:var(--radius-xl);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-4);padding:var(--space-8);cursor:pointer;transition:all var(--transition-base);background:#ffffff05;backdrop-filter:blur(8px);overflow:hidden}.dropzone:before{content:"";position:absolute;inset:0;background:var(--dropzone-glow);pointer-events:none}.dropzone:hover,.dropzone.drag-over{border-color:var(--color-orange);background:var(--accent-primary-hover-bg);box-shadow:var(--shadow-glow)}.dropzone.drag-over{animation:borderPulse 1s ease infinite}.dropzone-icon{width:64px;height:64px;border-radius:var(--radius-lg);background:var(--accent-primary-hover-bg);display:flex;align-items:center;justify-content:center;font-size:28px;transition:all var(--transition-base)}.dropzone:hover .dropzone-icon,.dropzone.drag-over .dropzone-icon{background:var(--accent-primary-hover-bg-intense);transform:scale(1.1)}.dropzone-title{font-family:var(--font-display);font-size:var(--text-lg);font-weight:600;color:var(--text-primary);text-align:center}.dropzone-subtitle{font-size:var(--text-sm);color:var(--text-muted);text-align:center}.dropzone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.file-list{display:flex;flex-direction:column;gap:var(--space-2);width:100%}.file-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:all var(--transition-fast);animation:fadeInUp .3s ease both}.file-item:hover{border-color:#5a7c9e80}.file-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:#42476966;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}.file-icon img{width:36px;height:36px;object-fit:cover;border-radius:var(--radius-sm)}.file-info{flex:1;min-width:0}.file-name{font-size:var(--text-sm);font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-size{font-size:var(--text-xs);color:var(--text-muted)}.file-remove{width:28px;height:28px;border-radius:var(--radius-sm);background:transparent;border:none;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;font-size:16px;transition:all var(--transition-fast);flex-shrink:0}.file-remove:hover{color:#fc4c4c;background:#fc4c4c1a}.progress-container{width:100%;display:flex;flex-direction:column;gap:var(--space-3)}.progress-header{display:flex;justify-content:space-between;align-items:flex-start;gap:var(--space-4)}.progress-filename{font-size:var(--text-sm);font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.progress-percent{font-family:var(--font-mono);font-size:var(--text-sm);font-weight:600;color:var(--color-orange);flex-shrink:0}.progress-bar-track{width:100%;height:8px;background:var(--bg-secondary);border-radius:var(--radius-full);overflow:hidden;position:relative}.progress-bar-fill{height:100%;background:var(--gradient-primary);border-radius:var(--radius-full);transition:width .3s ease;position:relative;overflow:hidden}.progress-bar-fill:after{content:"";position:absolute;top:0;left:0;bottom:0;width:40%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:progressShimmer 1.5s ease infinite}.progress-meta{display:flex;justify-content:space-between;font-size:var(--text-xs);color:var(--text-muted)}.progress-speed{font-family:var(--font-mono)}.room-code-display{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-6);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg)}.room-code-text{font-family:var(--font-mono);font-size:var(--text-3xl);font-weight:700;letter-spacing:.15em;background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;flex:1;text-align:center}.copy-btn{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--accent-primary-hover-bg);border:1px solid var(--accent-primary-hover-border);cursor:pointer;color:var(--color-orange);font-size:18px;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);flex-shrink:0}.copy-btn:hover{background:var(--accent-primary-hover-bg-intense);transform:scale(1.05)}.copy-btn.copied{color:#34d399;background:#34d3991a;border-color:#34d39933}.connection-status{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border-radius:var(--radius-full);font-size:var(--text-sm);font-weight:500;border:1px solid}.connection-status.connecting{background:var(--accent-secondary-hover-bg);border-color:var(--accent-secondary-hover-border);color:var(--color-gold)}.connection-status.connected,.connection-status.direct{background:#34d3991a;border-color:#34d39933;color:#34d399}.connection-status.relay{background:var(--accent-secondary-hover-bg);border-color:var(--accent-secondary-hover-border);color:var(--color-gold)}.connection-status.error{background:#fc4c4c1a;border-color:#fc4c4c33;color:#fc4c4c}.status-dot{width:8px;height:8px;border-radius:50%;background:currentColor;flex-shrink:0}.status-dot.pulse{animation:pulse 1.5s ease infinite}.qr-container{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);padding:var(--space-6);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl)}.qr-canvas-wrapper{padding:var(--space-4);background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.qr-canvas-wrapper canvas,.qr-canvas-wrapper svg{display:block}.overlay{position:fixed;inset:0;background:#021526cc;backdrop-filter:blur(8px);z-index:200;display:flex;align-items:center;justify-content:center;padding:var(--space-6);animation:fadeIn .2s ease}.modal{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-8);max-width:500px;width:100%;box-shadow:var(--shadow-lg);animation:fadeInUp .3s ease;position:relative}.modal-close{position:absolute;top:var(--space-4);right:var(--space-4);width:32px;height:32px;border-radius:var(--radius-sm);background:transparent;border:none;cursor:pointer;color:var(--text-muted);font-size:20px;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.modal-close:hover{background:#ffffff14;color:var(--text-primary)}.toast-container{position:fixed;bottom:var(--space-6);right:var(--space-6);z-index:300;display:flex;flex-direction:column;gap:var(--space-3);max-width:360px;width:100%}.toast{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md);animation:slideInRight .3s ease;backdrop-filter:blur(16px)}.toast.success{border-color:#34d3994d}.toast.error{border-color:#fc4c4c4d}.toast.info{border-color:#5a7c9e4d}.toast-icon{font-size:20px;flex-shrink:0}.toast-message{font-size:var(--text-sm);color:var(--text-primary);flex:1}.history-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--bg-card);border:1px solid var(--border-color);transition:all var(--transition-fast)}.history-item .history-status{font-size:20px;flex-shrink:0}.history-item .history-meta{font-size:var(--text-xs);color:var(--text-muted)}.hash-display{padding:var(--space-3) var(--space-4);background:var(--bg-secondary);border-radius:var(--radius-md);font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-muted);word-break:break-all;border:1px solid var(--border-color)}.how-it-works{padding:var(--space-24) 0;position:relative}.how-step-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--space-6);margin-top:var(--space-12)}.how-step{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);padding:var(--space-8) var(--space-6);text-align:center}.how-step-icon{width:72px;height:72px;border-radius:var(--radius-xl);background:var(--gradient-card);border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;font-size:32px;position:relative;box-shadow:var(--shadow-sm)}.how-step-number{position:absolute;top:-8px;right:-8px;width:22px;height:22px;border-radius:50%;background:var(--gradient-primary);color:#141414;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;font-family:var(--font-display)}.how-step-title{font-family:var(--font-display);font-size:var(--text-lg);font-weight:700;color:var(--text-primary)}.how-step-desc{font-size:var(--text-sm);color:var(--text-secondary)}.privacy-bullets{display:flex;flex-wrap:wrap;gap:var(--space-3);justify-content:center;margin-top:var(--space-8)}.privacy-bullet{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-full);font-size:var(--text-sm);font-weight:500;color:var(--text-secondary)}.privacy-bullet 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