:root{--bg: #f8fafc;--surface: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--primary: #0f172a;--primary-text: #ffffff;--danger: #b91c1c;--radius: 8px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.5}.centered{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center;color:var(--muted)}.auth-shell{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;width:100%;max-width:400px}.auth-card h1{font-size:22px;margin:0 0 4px}.auth-card .subtitle{color:var(--muted);margin:0 0 24px;font-size:14px}.auth-card label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}.auth-card input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:15px;background:#fff}.auth-card input:focus{outline:2px solid var(--primary);outline-offset:-1px}.auth-card button{margin-top:20px;width:100%;padding:11px;background:var(--primary);color:var(--primary-text);border:none;border-radius:var(--radius);font-size:15px;font-weight:500;cursor:pointer}.auth-card button:disabled{opacity:.5;cursor:not-allowed}.auth-card .error{margin-top:16px;color:var(--danger);font-size:14px}.auth-card .footer{margin-top:20px;font-size:14px;color:var(--muted);text-align:center}.auth-card a{color:var(--primary);text-decoration:none}.auth-card a:hover{text-decoration:underline}.admin{min-height:100%;display:grid;grid-template-columns:220px 1fr}.admin-sidebar{background:var(--primary);color:var(--primary-text);padding:20px 16px}.admin-sidebar .brand{font-weight:600;font-size:16px;margin-bottom:24px;letter-spacing:.02em}.admin-sidebar nav a{display:block;padding:8px 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8px;background:#e2e8f0;border-radius:999px;font-size:12px;text-transform:capitalize}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a80;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--surface);border-radius:var(--radius);padding:24px;width:100%;max-width:420px;margin:0 16px}.modal h3{margin:0 0 8px}.modal label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}.modal input,.modal select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:15px;background:#fff}.kv{display:grid;grid-template-columns:130px 1fr;gap:8px 16px;margin-top:16px;padding:14px;background:#f8fafc;border-radius:var(--radius)}.kv code{background:#fff;padding:2px 6px;border-radius:4px;border:1px solid var(--border);font-size:13px;-webkit-user-select:all;user-select:all;word-break:break-all}.error{margin-top:12px;padding:8px 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button{background:transparent;border:none;cursor:pointer;font-size:16px;padding:0;line-height:1}.responder{min-height:100%;background:var(--bg)}.alert-card{border-color:#fca5a5;border-width:2px;animation:pulseGlow 1.5s ease-in-out infinite}@keyframes pulseGlow{0%,to{box-shadow:0 0 #dc262600}50%{box-shadow:0 0 0 8px #dc262626}}