:root{--font-sans:"Inter",-apple-system,BlinkMacSystemFont,sans-serif;--font-mono:"JetBrains Mono","Fira Code",monospace;--radius:12px;--radius-sm:8px;--radius-lg:16px;--transition:.2s cubic-bezier(.4,0,.2,1)}[data-theme=dark]{--bg-primary:#0a0a0a;--bg-secondary:#111;--bg-tertiary:#1a1a1a;--bg-elevated:#1e1e1e;--bg-hover:#252525;--bg-active:#2a2a2a;--border:#2a2a2a;--border-light:#333;--text-primary:#e8e8e8;--text-secondary:#999;--text-tertiary:#666;--accent:#8ab4f8;--accent-hover:#aecbfa;--accent-dim:rgba(138,180,248,.1);--success:#81c995;--error:#f28b82;--warning:#fdd663;--sidebar-bg:#0f0f0f;--input-bg:#1a1a1a;--code-bg:#0d0d0d;--scrollbar:#333;--scrollbar-hover:#555;--shadow:0 4px 24px 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pre{font-size:12px}.welcome-screen h2{font-size:22px}.welcome-screen p{font-size:14px}.modal-overlay{align-items:flex-end}.modal{max-width:100%;max-height:90vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0}.modal-header,.modal-body{padding:16px 18px}.modal-footer{padding:12px 18px}.admin-sidebar{width:60px;min-width:60px;padding:12px 8px}.admin-sidebar h3 span,.admin-nav-item span{display:none}.admin-content{padding:16px}.stat-grid{grid-template-columns:1fr}}@media (max-width: 480px){.top-bar-actions{gap:4px}.top-bar-user{display:none}.model-select{max-width:90px}.chat-messages{padding:12px 10px 90px}}