:root{--bg-primary: #ffffff;--bg-secondary: #f9f9fb;--bg-tertiary: #f1f1f5;--bg-sidebar: #f9f9fb;--bg-hover: #f1f1f5;--bg-active: #ebebf0;--bg-input: #ffffff;--bg-message-user: transparent;--bg-message-assistant: transparent;--bg-code: #0f0f12;--bg-modal: rgba(255, 255, 255, .9);--bg-badge: #eff1ff;--text-primary: #0f0f0f;--text-secondary: #6b6b6b;--text-tertiary: #a0a0a0;--text-inverse: #ffffff;--text-code: #e2e8f0;--border-primary: #e5e5e5;--border-secondary: #d4d4d4;--border-focus: #0f0f0f;--accent-primary: #0f0f0f;--accent-secondary: #333333;--accent-hover: #444444;--accent-gradient: linear-gradient(135deg, #0f0f0f 0%, #333333 100%);--accent-soft: rgba(0, 0, 0, .05);--success: #10b981;--warning: #f59e0b;--error: #ef4444;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .04);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .12);--shadow-input: 0 4px 16px rgba(0, 0, 0, .08);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-2xl: 28px;--radius-full: 9999px;--sidebar-width: 255px;--sidebar-collapsed: 0px;--header-height: 56px;--input-max-width: 800px;--transition-fast: .15s ease;--transition-slow: .3s ease;font-family:Inter,sans-serif;font-feature-settings:"liga" 1,"calt" 1}@supports (font-variation-settings: normal){:root{font-family:InterVariable,sans-serif}}[data-theme=dark]{--bg-primary: #0a0a0a;--bg-secondary: #121212;--bg-tertiary: #1a1a1a;--bg-sidebar: #0a0a0a;--bg-hover: #161616;--bg-active: #202020;--bg-input: #121212;--bg-message-user: transparent;--bg-message-assistant: transparent;--bg-code: #000000;--bg-modal: rgba(0, 0, 0, .9);--bg-badge: rgba(255, 255, 255, .1);--text-primary: #f5f5f5;--text-secondary: #a3a3a3;--text-tertiary: #737373;--text-inverse: #000000;--text-code: #e2e8f0;--border-primary: #262626;--border-secondary: #404040;--border-focus: #ffffff;--accent-primary: #ffffff;--accent-secondary: #e5e5e5;--accent-hover: #d1d1d1;--accent-gradient: linear-gradient(135deg, #ffffff 0%, #a3a3a3 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var(--transition-fast)}.admin-action-btn:hover:not(:disabled){background:var(--bg-hover)}.admin-action-btn.promote:hover:not(:disabled){border-color:#6366f1;color:#6366f1;background:#6366f114}.admin-action-btn.demote:hover:not(:disabled){border-color:var(--warning);color:var(--warning)}.admin-action-btn.delete:hover:not(:disabled){border-color:var(--error);color:var(--error);background:#ef444414}.admin-action-btn:disabled{opacity:.3;cursor:not-allowed}.admin-loading{display:flex;align-items:center;justify-content:center;gap:10px;padding:60px 20px;color:var(--text-tertiary);font-size:14px}.admin-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);padding:10px 20px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;z-index:10000;animation:toastIn .3s ease}.admin-toast.success{background:var(--success);color:#fff}.admin-toast.error{background:var(--error);color:#fff}.user-dropdown-item.admin-item{color:#6366f1}@media(max-width:768px){.sidebar{position:fixed;left:0;top:0;transform:translate(-100%);z-index:100;width:var(--sidebar-width);box-shadow:var(--shadow-lg)}.sidebar.mobile-open{transform:translate(0)}.sidebar.collapsed{transform:translate(-100%)}.sidebar-overlay.visible{display:block;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:999}.sidebar.mobile-open{transform:translate(0)!important;z-index:1000!important}.mobile-menu-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;color:var(--text-primary);cursor:pointer;background:none;border:none;padding:0}.chat-header-title{max-width:180px}.message-inner{padding:0 14px}.chat-input-container{padding:12px 14px calc(14px + env(safe-area-inset-bottom,0px));background:var(--bg-primary);border-top:1px solid 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var(--border-primary);padding:0;gap:0}.settings-tab{flex:1;justify-content:center;padding:10px 8px;border-radius:0;white-space:nowrap;font-size:12px}.settings-content{padding:16px}.settings-input-row{flex-direction:column}.settings-save-btn{width:100%}.danger-card{flex-direction:column;align-items:flex-start;gap:10px}.danger-btn{width:100%;justify-content:center}.danger-confirm{width:100%;flex-direction:column}.danger-confirm button{width:100%}.user-menu-container{display:none}.hidden-on-mobile{display:none!important}.ephemeral-toggle-btn:not(.mobile-ephemeral){display:none!important}.sidebar-toggle.fixed-toggle{display:none!important}.ephemeral-toggle-btn.mobile-ephemeral{position:static!important;width:34px;height:34px;padding:0;border-radius:50%;flex-shrink:0;border:1px solid var(--border-primary);background:transparent}.ephemeral-toggle-btn.mobile-ephemeral span{display:none}.mobile-login-pill{padding:3px;gap:0;border:1px solid var(--border-primary);flex-shrink:0}.mobile-login-pill .login-pill-name{display:none}.mobile-login-pill .login-pill-avatar{width:26px;height:26px;font-size:11px}.mobile-login-pill .login-pill-chevron{display:none}.mobile-header .user-dropdown,.mobile-user-dropdown{position:fixed;top:calc(60px + env(safe-area-inset-top,0px));right:10px;min-width:220px;z-index:1001}.login-pill-name{display:none}.login-pill{padding:4px 8px;gap:4px}.user-dropdown{right:0;min-width:220px}.plus-menu{left:0;right:auto;min-width:200px}.auth-card{margin:16px;padding:24px;max-width:calc(100vw - 32px)}.auth-logo h1{font-size:22px}.admin-stats{grid-template-columns:repeat(2,1fr);padding:16px;gap:10px}.admin-stat-card{padding:14px}.admin-stat-value{font-size:18px}.admin-header{padding:12px 16px}.admin-title h1{font-size:16px}.admin-toolbar{padding:0 16px 12px;flex-direction:column;align-items:stretch}.admin-search{max-width:none}.admin-table-wrapper{padding:0 16px 16px}.hide-mobile{display:none}.admin-user-cell{min-width:140px}.admin-user-email{max-width:120px}.admin-refresh-btn span,.admin-refresh-btn{font-size:12px;padding:6px 10px}}@media(max-width:480px){.empty-state h2{font-size:20px}.empty-state p{font-size:13px}.suggestion-chips{flex-direction:column;align-items:stretch}.suggestion-chips button{text-align:left}.admin-stats{grid-template-columns:1fr 1fr;gap:8px;padding:12px}.admin-stat-card{padding:12px;gap:10px}.admin-stat-icon{width:36px;height:36px}.admin-stat-value{font-size:16px}}