#app>*{min-height:100%}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}#app{height:100%;display:flex;flex-direction:column}:root{--primary: #c2185b;--primary-dark: #9b1349;--primary-light: #d94078;--accent: #f5c518;--bg: #f0f2f5;--bg-card: #ffffff;--text: #1a1a2e;--text-secondary: #6b7280;--text-light: #767676;--text-muted: #9ca3af;--border: #e5e7eb;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--info: #3b82f6;--radius: 12px;--radius-lg: 16px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1), 0 4px 6px rgba(0, 0, 0, .05)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{text-decoration:none;color:inherit}button{cursor:pointer;font-family:inherit;border:none}input{font-family:inherit}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:none;box-shadow:0 0 0 3px #c2185b73;border-radius:4px}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px;gap:12px}.chat-empty>svg{width:48px;height:48px;opacity:.3;color:var(--text-light)}.chat-empty>p{font-size:15px;color:var(--text-light);font-weight:500}.empty-state-card{background:var(--bg-card);border:1.5px dashed var(--border);border-radius:var(--radius-lg);padding:40px 32px;display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center;max-width:440px;width:100%;transition:border-color .2s ease,box-shadow .2s ease}.empty-state-card:hover{border-color:var(--primary)}.empty-state-icon{width:60px;height:60px;border-radius:16px;background:#c2185b14;display:flex;align-items:center;justify-content:center;margin-bottom:4px}.empty-state-icon svg{width:30px;height:30px;color:var(--primary);opacity:.9}.empty-state-title{font-size:18px;font-weight:700;color:var(--text);margin:0}.empty-state-desc{font-size:14px;color:var(--text-secondary);line-height:1.5;margin:0;max-width:360px}.empty-state-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:8px;width:100%}.empty-primary-btn,.empty-secondary-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 20px;height:42px;font-size:14px;font-weight:600;border-radius:10px;transition:transform .15s,box-shadow .15s,background .15s,border-color .15s;cursor:pointer;white-space:nowrap}.empty-primary-btn{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border:none}.empty-primary-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #c2185b40}.empty-secondary-btn{background:var(--bg-card);color:var(--text);border:1.5px solid var(--border)}.empty-secondary-btn:hover{background:var(--bg);border-color:var(--primary);color:var(--primary)}.empty-primary-btn svg,.empty-secondary-btn svg{width:18px;height:18px}.empty-state-formats,.empty-state-models{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:8px}.format-tag,.model-tag{padding:4px 12px;background:var(--bg);border:1px solid var(--border);border-radius:16px;font-size:11px;font-weight:600;color:var(--text-secondary)}.empty-state-hint{font-size:12px;color:var(--text-light);margin:0;font-style:italic}.chat-welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;text-align:center;padding:40px 20px}.welcome-icon{width:60px;height:60px;background:#fff;border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;box-shadow:var(--shadow-md);border:1px solid var(--border)}.welcome-icon svg{width:30px;height:30px;color:var(--primary)}.chat-welcome h3{font-size:20px;font-weight:700;color:var(--text);margin-bottom:12px}.chat-welcome>p{font-size:14px;color:var(--text-secondary);max-width:440px;line-height:1.6;margin-bottom:24px}.welcome-suggestions{display:flex;flex-direction:column;gap:8px;width:100%;max-width:480px}.welcome-suggestions button{padding:12px 18px;background:#fff;border:1px solid var(--border);border-radius:10px;font-size:13.5px;font-weight:500;color:var(--text);text-align:left;transition:all .2s;cursor:pointer}.welcome-suggestions button:hover{border-color:var(--primary);color:var(--primary);background:#c2185b08;transform:translate(4px)}.welcome-model-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:#c2185b0f;border:1px solid rgba(194,24,91,.15);border-radius:20px;font-size:13px;font-weight:600;color:var(--primary);margin-bottom:24px}.welcome-model-badge svg{width:14px;height:14px}.model-provider-label{font-weight:400;color:var(--text-light);font-size:12px}@media(max-width:640px){.empty-state-card{padding:32px 20px}.empty-state-actions{flex-direction:column}.empty-primary-btn,.empty-secondary-btn{width:100%}.chat-welcome{padding:24px 16px}.welcome-suggestions button{padding:10px 14px;font-size:13px}}.btn-action-round{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;transition:all .2s ease;flex-shrink:0;border:1px solid var(--border);background:#fff;color:var(--text-secondary)}.btn-action-round:hover{background:var(--bg);border-color:var(--primary-light);color:var(--primary);transform:scale(1.05)}.btn-action-round svg{width:18px;height:18px}.btn-action-round.active{background:var(--error);color:#fff;border-color:var(--error);animation:pulse-red 2s infinite}@keyframes pulse-red{0%{box-shadow:0 0 #ef444466}70%{box-shadow:0 0 0 10px #ef444400}to{box-shadow:0 0 #ef444400}}@media(max-width:640px){.btn-action-round{width:34px;height:34px}.btn-action-round svg{width:16px;height:16px}}.btn-with-icon{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 16px;height:40px;border-radius:10px;font-size:14px;font-weight:600;transition:all .2s ease;background:#fff;border:1px solid var(--border);color:var(--text-secondary);white-space:nowrap;cursor:pointer;flex-shrink:0}.btn-with-icon:hover{background:var(--bg);border-color:var(--primary-light);color:var(--primary);transform:translateY(-1px);box-shadow:0 2px 8px #0000001a}.btn-with-icon svg{width:18px;height:18px;flex-shrink:0}.btn-with-icon.is-recording{background:#fef2f2;color:var(--error);border-color:var(--error);animation:pulse-border 2s infinite}@keyframes pulse-border{0%{box-shadow:0 0 #ef444433}70%{box-shadow:0 0 0 6px #ef444400}to{box-shadow:0 0 #ef444400}}.btn-with-icon.primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border:none}.btn-with-icon.primary:hover{background:linear-gradient(135deg,var(--primary-dark),var(--primary));transform:translateY(-1px);box-shadow:0 4px 12px #c2185b4d}@media(max-width:640px){.sidebar-upload-row .btn-with-icon,.sidebar-upload .btn-with-icon{padding:0 10px;min-width:40px}.sidebar-upload-row .btn-with-icon span:not(:first-child),.sidebar-upload .btn-with-icon span:not(:first-child){display:none}.empty-state-actions .btn-with-icon{width:100%;justify-content:center;padding:0 20px;height:44px;font-size:14px}.empty-state-actions .btn-with-icon span{display:inline!important}}.chat-header{flex-wrap:nowrap;min-width:0}.chat-header-info{min-width:0;flex:1;overflow:hidden}.chat-header-info h2{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}@media(max-width:640px){.chat-header{padding:12px 14px!important;gap:8px!important}.chat-header-info h2{font-size:14px!important}.mobile-sidebar-btn{display:flex!important;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--bg);border:1px solid var(--border);flex-shrink:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}