:root{color-scheme:light;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.45;color:#111827;background:#f3f4f6}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}.app-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:#0f172a;color:#e2e8f0;padding:24px 16px;display:flex;flex-direction:column;gap:8px}.sidebar h1{font-size:1.1rem;margin:0 0 16px;letter-spacing:.02em}.sidebar a,.sidebar button.linkish{display:block;padding:10px 12px;border-radius:8px;color:#cbd5e1;background:transparent;border:0;text-align:left;width:100%}.sidebar a.active,.sidebar a:hover,.sidebar button.linkish:hover{background:#1e293b;color:#fff}.main{padding:24px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;margin-bottom:16px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.btn{background:#2563eb;color:#fff;border:0;border-radius:8px;padding:10px 14px;font-weight:600}.btn.secondary{background:#e5e7eb;color:#111827}.btn.danger{background:#dc2626}.input,.textarea,.select{width:100%;border:1px solid #d1d5db;border-radius:8px;padding:10px 12px;background:#fff}.textarea{min-height:120px;resize:vertical}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:10px 8px;border-bottom:1px solid #eee;vertical-align:top}.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px;font-weight:600}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:100%;max-width:380px;background:#fff;border-radius:16px;padding:28px;border:1px solid #e5e7eb;box-shadow:0 10px 30px #0000000f}.muted{color:#6b7280;font-size:.9rem}.error{color:#dc2626;margin-top:8px}.success{color:#059669;margin-top:8px}.thread{display:grid;grid-template-columns:1.4fr .9fr;gap:16px}.bubble{max-width:85%;padding:10px 12px;border-radius:12px;margin-bottom:10px;white-space:pre-wrap}.bubble.user{background:#eff6ff;margin-right:auto}.bubble.admin{background:#ecfdf5;margin-left:auto}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{flex-direction:row;flex-wrap:wrap}.thread{grid-template-columns:1fr}}