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ease}.clear-button:hover{background:#ffffff4d}.chat-messages{flex:1;overflow-y:auto;padding:20px;background:#fafbfc;scroll-behavior:smooth}.message{margin-bottom:24px;animation:fadeIn .3s ease-in}.message-content{display:flex;gap:12px}.message.user .message-content{flex-direction:row-reverse}.message-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;background:#f1f3f4}.message.user .message-avatar{background:#667eea}.message-text{flex:1;max-width:80%}.message.user .message-text{display:flex;flex-direction:column;align-items:flex-end}.message-body{background:#fff;padding:12px 16px;border-radius:18px;line-height:1.5;word-wrap:break-word;white-space:pre-wrap;box-shadow:0 1px 2px #0000001a;border:1px solid #e1e5e9}.message.user .message-body{background:#667eea;color:#fff;border:1px solid #5a6fd8}.message.error .message-body{background:#fee2e2;color:#dc2626;border:1px solid #fca5a5}.message-meta{display:flex;gap:8px;margin-top:4px;font-size:11px;color:#6b7280;opacity:.7}.message.user .message-meta{justify-content:flex-end}.message-time,.message-model,.message-tokens{background:#0000000d;padding:2px 6px;border-radius:10px}.typing-indicator{display:flex;gap:4px;padding:12px 16px;background:#fff;border-radius:18px;border:1px solid #e1e5e9}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:#6b7280;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}.chat-input{padding:20px;border-top:1px solid #e1e5e9;background:#fff}.input-container{display:flex;gap:12px;align-items:flex-end}.message-input{flex:1;min-height:44px;max-height:120px;padding:12px 16px;border:2px solid #e1e5e9;border-radius:22px;font-family:inherit;font-size:14px;line-height:1.4;resize:none;outline:none;transition:all .2s ease;background:#fafbfc}.message-input:focus{border-color:#667eea;background:#fff;box-shadow:0 0 0 3px #667eea1a}.message-input:disabled{opacity:.6;cursor:not-allowed}.send-button{width:44px;height:44px;border:none;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:16px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;flex-shrink:0}.send-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #667eea66}.send-button:disabled{opacity:.5;cursor:not-allowed}.input-hint{margin-top:8px;font-size:12px;color:#6b7280;text-align:center;opacity:.7}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#a8a8a8}@media (max-width: 768px){.chat-window{height:500px;border-radius:0;border-left:none;border-right:none}.chat-header{padding:12px 16px}.chat-title h3{font-size:16px}.chat-messages{padding:16px}.message-text{max-width:85%}.chat-input{padding:16px}.model-selector{font-size:11px}}:root{--gitthub-beige: #E8DDD4;--gitthub-light-beige: #F0E8E0;--gitthub-dark-beige: #D4C4B0;--gitthub-black: #000000;--gitthub-dark-gray: #1a1a1a;--gitthub-gray: #333333;--gitthub-light-gray: #666666;--gitthub-white: #FFFFFF;--font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: "Courier New", monospace;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--spacing-xxl: 4rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 16px;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 8px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .2)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-primary);background-color:var(--gitthub-beige);color:var(--gitthub-black);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:900;line-height:1.2;letter-spacing:-.02em}h1{font-size:clamp(2.5rem,5vw,4rem)}h2{font-size:clamp(2rem,4vw,3rem)}h3{font-size:clamp(1.5rem,3vw,2rem)}h4{font-size:clamp(1.25rem,2.5vw,1.5rem)}p{font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.8}a{color:inherit;text-decoration:none;transition:all .3s ease}button{cursor:pointer;font-family:inherit;transition:all .3s ease}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--gitthub-light-beige)}::-webkit-scrollbar-thumb{background:var(--gitthub-black);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--gitthub-gray)}::selection{background:var(--gitthub-black);color:var(--gitthub-beige)}::-moz-selection{background:var(--gitthub-black);color:var(--gitthub-beige)}