:root{--primary: #1b2f5e;--primary-light: #eef2ff;--bg: #f5f7fa;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--error: #ef4444;--error-bg: #fef2f2;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.centered-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;width:100%;max-width:380px;box-shadow:0 1px 3px #0000000f}.card h1{font-size:20px;margin:0 0 4px}.card p.subtitle{color:var(--text-muted);font-size:14px;margin:0 0 24px}label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text-muted)}input{width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;margin-bottom:16px}input:focus{outline:none;border-color:var(--primary)}button{width:100%;padding:11px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer}button:disabled{opacity:.6;cursor:default}button.secondary{background:transparent;color:var(--primary);border:1.5px solid var(--border)}.error-box{background:var(--error-bg);color:var(--error);border-radius:8px;padding:10px 12px;font-size:13px;margin-bottom:16px}.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--surface);border-bottom:1px solid var(--border)}.app-header h1{font-size:16px;margin:0}.app-header .admin-email{font-size:13px;color:var(--text-muted)}.app-content{padding:24px;max-width:960px;margin:0 auto}.stats-row{display:flex;gap:16px;margin-bottom:24px}.stat-card{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 20px}.stat-card .value{font-size:28px;font-weight:700;color:var(--primary)}.stat-card .label{font-size:13px;color:var(--text-muted)}.search-input{margin-bottom:16px;max-width:320px}table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}th,td{text-align:left;padding:12px 16px;font-size:14px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px}tbody tr{cursor:pointer}tbody tr:hover{background:var(--primary-light)}tbody tr:last-child td{border-bottom:none}.back-link{display:inline-block;margin-bottom:16px;color:var(--primary);font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;background:none;border:none;padding:0;width:auto}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}.detail-field .label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.4px}.detail-field .value{font-size:15px;margin-top:2px}.empty-state{text-align:center;color:var(--text-muted);padding:40px}