:root {
    --bg: #f4f6f8;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #d9dee7;
    --primary: #1f5eff;
    --primary-dark: #1648c7;
    --success-bg: #e7f8ed;
    --success-text: #166534;
    --error-bg: #fee2e2;
    --error-text: #991b1b;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.topbar { background: #111827; color: #fff; padding: 14px 0; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.brand { font-weight: 700; font-size: 18px; }
.topbar a { color: #fff; margin-left: 16px; }
.page { padding: 28px 0 50px; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 20px; }
.page-header h1 { margin: 0 0 6px; font-size: 30px; }
.page-header p { margin: 0; color: var(--muted); }
.card, .form-card, .search-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 6px 18px rgba(17,24,39,0.04); }
.button, button { display: inline-block; border: 0; background: var(--primary); color: #fff; padding: 10px 16px; border-radius: 8px; font-weight: 700; cursor: pointer; }
.button:hover, button:hover { background: var(--primary-dark); color: #fff; text-decoration: none; }
.button.small { padding: 8px 12px; }
.link-button { display: inline-block; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); }
.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 18px; }
.alert.success { background: var(--success-bg); color: var(--success-text); }
.alert.error { background: var(--error-bg); color: var(--error-text); }
.header-actions { display: flex; gap: 10px; align-items: center; }
.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 18px; margin-bottom: 18px; }
.summary-grid strong { display: block; color: var(--muted); margin-bottom: 4px; }
.detail-section { margin-bottom: 18px; padding: 18px; }
.detail-section h2 { margin: 0 0 12px; font-size: 20px; }
.detail-table { width: 100%; border-collapse: collapse; }
.detail-table th, .detail-table td { border-top: 1px solid var(--border); padding: 10px; vertical-align: top; text-align: left; }
.detail-table th { width: 35%; background: #f9fafb; }
@media (max-width: 760px) { .page-header, .topbar-inner { flex-direction: column; } .summary-grid { grid-template-columns: 1fr; } }