:root{--bg-dark: #f8fafc;--bg-dark-deep: #f1f5f9;--bg-gradient-1: rgba(252, 211, 77, .25);--bg-gradient-2: rgba(125, 211, 252, .22);--bg-gradient-3: rgba(134, 239, 172, .2);--glass-surface: rgba(255, 255, 255, .75);--glass-border: rgba(15, 23, 42, .12);--glass-highlight: rgba(255, 255, 255, .9);--glass-shadow: 0 10px 30px -8px rgba(15, 23, 42, .18);--text-main: #0f172a;--text-muted: #475569;--text-dim: #94a3b8;--primary: #0ea5a4;--primary-hover: #14b8a6;--primary-glow: rgba(14, 165, 164, .25);--success: #16a34a;--error: #dc2626;--surface-muted: rgba(15, 23, 42, .05);--surface-muted-hover: rgba(15, 23, 42, .08);--surface-strong: rgba(15, 23, 42, .12);--surface-strong-hover: rgba(15, 23, 42, .16);--surface-sent: rgba(14, 165, 164, .12);--surface-sent-border: rgba(14, 165, 164, .25);--radius-lg: 24px;--radius-md: 16px;--radius-sm: 10px;--shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, .12), 0 8px 10px -6px rgba(15, 23, 42, .1);--shadow-glow: 0 0 60px -15px var(--primary-glow);--scrollbar-thumb: rgba(15, 23, 42, .2);--scrollbar-thumb-hover: rgba(15, 23, 42, .3);--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, monospace}*,*:before,*:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{background-color:var(--bg-dark-deep);background-image:radial-gradient(circle at 0% 0%,var(--bg-gradient-1),transparent 45%),radial-gradient(circle at 100% 0%,var(--bg-gradient-2),transparent 45%),radial-gradient(circle at 50% 100%,var(--bg-gradient-3),transparent 55%);background-attachment:fixed;color:var(--text-main);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}.app-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;position:relative;gap:32px}.app-header{text-align:center;max-width:640px;width:100%}.app-header p{margin-bottom:0}.view-page{width:100%;max-width:640px;display:flex;flex-direction:column;align-items:center;gap:24px;margin:0 auto}.glass-card{background:var(--glass-surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-top:1px solid var(--glass-highlight);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg),inset 0 0 0 1px #0f172a08;padding:48px 40px;width:100%;text-align:center;position:relative;overflow:hidden;transition:transform .4s cubic-bezier(.16,1,.3,1),box-shadow .4s ease}.glass-card:before{content:"";position:absolute;top:-50%;left:-50%;right:-50%;bottom:-50%;background:radial-gradient(circle at center,rgba(14,165,164,.08),transparent 60%);pointer-events:none;z-index:0}.glass-card>*{position:relative;z-index:1}h1,h2,h3{margin-top:0;color:var(--text-main);letter-spacing:-.02em}h1{font-size:36px;font-weight:800;margin-bottom:24px;background:linear-gradient(to right,#0f172a,#334155);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}h2{font-size:28px;font-weight:700;margin-bottom:16px;background:linear-gradient(to right,#0f172a,#334155);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}p{color:var(--text-muted);line-height:1.6;font-size:15px;margin:0 0 32px}small{font-size:13px;color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 28px;border-radius:var(--radius-md);font-size:15px;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.16,1,.3,1);text-decoration:none;border:1px solid transparent;outline:none}.btn:not(.btn-primary){background:var(--surface-muted);color:var(--text-main);border-color:var(--glass-border)}.btn:not(.btn-primary):hover:not(:disabled){background:var(--surface-muted-hover);border-color:var(--surface-strong);transform:translateY(-2px)}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 20px -5px var(--primary-glow);position:relative;overflow:hidden}.btn-primary:hover:not(:disabled){background:var(--primary-hover);box-shadow:0 8px 30px -5px var(--primary-glow);transform:translateY(-2px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;filter:grayscale(.5)}.btn-icon{padding:12px;border-radius:50%;aspect-ratio:1}.code-input-container{display:flex;gap:12px;margin:32px 0}.code-input{width:100%;background:#ffffffd9;border:1px solid var(--glass-border);border-radius:var(--radius-md);color:var(--text-main);font-family:var(--font-mono);font-size:24px;text-align:center;padding:16px;letter-spacing:.2em;transition:all .3s ease;outline:none}.code-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px #0ea5a426;background:#fff}.code-input::placeholder{color:var(--text-dim);letter-spacing:normal;font-size:16px}.role-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;width:100%}.role-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:32px 24px;background:#ffffffb3;border:1px solid var(--glass-border);border-radius:var(--radius-md);cursor:pointer;transition:all .3s ease;-webkit-user-select:none;user-select:none}.role-card:hover{background:#ffffffe6;border-color:#0f172a2e;transform:translateY(-4px);box-shadow:0 10px 30px -10px #0f172a2e}.role-icon{font-size:40px;filter:drop-shadow(0 0 10px rgba(15,23,42,.12))}.role-label{font-weight:600;font-size:16px;color:var(--text-main)}.code-display{font-family:var(--font-mono);font-size:48px;font-weight:700;letter-spacing:.1em;color:var(--text-main);text-shadow:0 0 30px var(--primary-glow);margin:32px 0;-webkit-user-select:all;user-select:all}.code-sep{opacity:.5;margin:0 8px}.conn-status{display:inline-flex;align-items:center;font-size:13px;padding:6px 12px;border-radius:20px;background:var(--surface-muted);color:var(--primary);margin-top:16px}.transfer-area{width:100%;display:flex;flex-direction:column;gap:16px}.transfer-container{background:#ffffffb3;border-radius:var(--radius-md);border:1px solid var(--glass-border);overflow:hidden;display:flex;flex-direction:column}.transfer-list{display:flex;flex-direction:column;gap:12px;min-height:200px;max-height:400px;overflow-y:auto;padding:16px}.transfer-divider{width:100%;height:1px;background:var(--glass-border)}#transfer-input-area{padding:16px;background:var(--surface-muted)}.file-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--surface-muted);border-radius:var(--radius-sm);max-width:90%;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.file-item.sent{align-self:flex-end;background:var(--surface-sent);border:1px solid var(--surface-sent-border)}.file-item.received{align-self:flex-start;background:#ffffffd9}.file-info{flex:1;min-width:0;text-align:left}.file-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}.file-meta{font-size:12px;color:var(--text-muted);margin-top:4px}.progress-bar{height:4px;background:var(--surface-strong);border-radius:2px;margin-top:8px;overflow:hidden}.progress-fill{height:100%;background:var(--success);width:0%;transition:width .1s linear}.chat-input{width:100%;background:transparent;border:none;font-family:inherit;resize:none;min-height:60px;outline:none;font-size:15px;padding:0;color:var(--text-main)}.faq-section{width:100%;max-width:640px;margin-top:48px;text-align:left}.faq-section h2{font-size:20px;background:none;-webkit-text-fill-color:var(--text-main)}.faq-item{border-bottom:1px solid var(--glass-border)}.faq-item summary{padding:20px 0;cursor:pointer;list-style:none;font-weight:500;display:flex;justify-content:space-between;align-items:center;transition:color .2s}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:hover{color:var(--primary-hover)}.faq-item summary:after{content:"+";font-weight:300;font-size:20px;opacity:.7}.faq-item[open] summary:after{content:"−"}.faq-answer{padding-bottom:20px;color:var(--text-muted);font-size:14px;line-height:1.6}.fade-in{animation:fadeIn .5s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.hidden{display:none!important}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}@media(max-width:768px){.glass-card{padding:32px 20px;border-radius:var(--radius-md)}h2{font-size:24px}.app-container{padding:12px}.role-grid{grid-template-columns:1fr;gap:16px}.role-card{padding:24px;flex-direction:row;justify-content:flex-start}.role-icon{font-size:32px}.code-display{font-size:36px;letter-spacing:.05em}.code-input-container{flex-direction:column;gap:16px}.code-input-container .btn{width:100%;padding:16px}.btn{min-height:48px;font-size:16px}.faq-answer{font-size:15px;line-height:1.7}.faq-item summary{padding:16px 0}}.github-link{position:absolute;top:24px;right:24px;color:var(--text-muted);transition:all .3s cubic-bezier(.16,1,.3,1);display:flex;align-items:center;justify-content:center;z-index:10;opacity:.8}.github-link:hover{color:var(--text-main);transform:scale(1.1) rotate(5deg);opacity:1}.github-link svg{fill:currentColor}@media(max-width:768px){.github-link{top:16px;right:16px}.github-link svg{width:28px;height:28px}}