:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #eef3f9;
  --text: #172033;
  --muted: #68758a;
  --border: #d8e0ec;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #15803d;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.09);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: Inter, Segoe UI, system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
.topbar { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; padding: 0.85rem 1.25rem; background: rgba(255,255,255,0.92); border-bottom: 1px solid var(--border); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.brand { font-size: 1.2rem; font-weight: 800; letter-spacing: -0.03em; }
.topbar nav { display: flex; gap: 1rem; color: var(--muted); font-weight: 700; }
main { min-height: calc(100vh - 58px); }
.eyebrow { color: var(--accent); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; letter-spacing: -0.03em; }
p { color: var(--muted); }
.btn { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: 0.65rem 1rem; font-weight: 800; cursor: pointer; }
.btn.primary, .primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:hover { transform: translateY(-1px); }
.input { width: 100%; border: 1px solid var(--border); border-radius: 14px; padding: 0.7rem 0.8rem; background: #fff; color: var(--text); font: inherit; }
textarea.input { resize: vertical; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 1rem; box-shadow: var(--shadow); }
.form-stack { display: grid; gap: 0.85rem; }
.form-stack label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.9rem; font-weight: 700; }
.checkbox { display: flex !important; grid-template-columns: auto 1fr; align-items: center; gap: 0.5rem !important; }
.auth-card { width: min(440px, calc(100vw - 2rem)); margin: 8vh auto; padding: 2rem; background: var(--surface); border: 1px solid var(--border); border-radius: 28px; box-shadow: var(--shadow); }
.flash-stack { padding: 1rem; display: grid; gap: 0.5rem; }
.flash { border-radius: 14px; padding: 0.75rem 1rem; background: var(--surface); border: 1px solid var(--border); }
.flash-danger { border-color: #fecaca; color: #991b1b; background: #fef2f2; }
.status-line { min-height: 1.5rem; color: var(--muted); font-weight: 700; }
.status-line.error { color: var(--danger); }
.table-wrap { overflow: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { text-align: left; padding: 0.7rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table th { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; }
.button-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }