:root{--bg: #f5f6f8;--panel: #ffffff;--text: #1a1a1a;--hint: #6b7280;--border: #e5e7eb;--accent: #2481cc;--accent-text: #ffffff;--danger: #e5484d;--success: #1f9d55}@media (prefers-color-scheme: dark){:root{--bg: #16181c;--panel: #1f2227;--text: #f0f0f0;--hint: #9aa0a6;--border: #33363c}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}h1{font-size:1.4rem;margin:0 0 4px}h2{font-size:1.1rem}h3{font-size:.95rem;color:var(--hint)}.muted{color:var(--hint)}.error{color:var(--danger)}.screen-center{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-card{width:320px;display:flex;flex-direction:column;gap:10px}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px;margin-bottom:16px}.layout{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px;gap:4px}.sidebar-title{font-weight:600;padding:8px 10px 16px}.nav-link{display:block;padding:8px 10px;border-radius:8px;color:var(--text);text-decoration:none;font-size:.9rem;background:none;border:none;text-align:left;cursor:pointer}.nav-link:hover{background:var(--bg)}.nav-link.active{background:var(--accent);color:var(--accent-text)}.nav-link.logout{margin-top:auto;color:var(--danger)}.content{flex:1;padding:24px 32px;max-width:1100px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);font-size:.9rem}th{color:var(--hint);font-weight:500}tr:hover td{background:var(--bg)}a.row-link{color:inherit;text-decoration:none;display:block}label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;color:var(--hint);margin-bottom:10px}input,textarea,select{font:inherit;padding:7px 10px;border-radius:6px;border:1px solid var(--border);background:var(--panel);color:var(--text)}.button{display:inline-block;background:var(--accent);color:var(--accent-text);border:none;border-radius:8px;padding:8px 14px;font-size:.9rem;cursor:pointer}.button:disabled{opacity:.6;cursor:default}.button.secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}.button.danger{background:transparent;color:var(--danger);border:1px solid var(--danger)}.button.danger:hover{background:var(--danger);color:#fff}.button.small{padding:4px 10px;font-size:.78rem;border-radius:6px}.badge{display:inline-block;padding:2px 8px;border-radius:6px;background:var(--bg);color:var(--hint);font-size:.8rem}.badge-success{color:var(--success)}.avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;display:block}.avatar-placeholder{display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--accent-text);font-size:.85rem;font-weight:600}.avatar-lg{width:56px;height:56px}.avatar-lg.avatar-placeholder{font-size:1.3rem}.row{display:flex;gap:10px;align-items:flex-end}.chat{display:flex;flex-direction:column;gap:8px;max-height:400px;overflow-y:auto;margin-bottom:12px}.chat-bubble{max-width:70%;padding:8px 12px;border-radius:10px;font-size:.9rem}.chat-bubble.in{background:var(--bg);align-self:flex-start}.chat-bubble.out{background:var(--accent);color:var(--accent-text);align-self:flex-end}.chat-meta{font-size:.75rem;opacity:.7;margin-top:2px}