:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success-bg: #ecfdf5;
  --success-text: #047857;
  --error-bg: #fef2f2;
  --error-text: #b91c1c;
  --border: #e5e7eb;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 6px 4px;
  border-bottom: 2px solid transparent;
}

.nav a.active, .nav a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.user-pill {
  background: var(--bg);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--muted);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

h1 { font-size: 1.6rem; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 28px 0 12px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.auth-card {
  max-width: 380px;
  margin: 60px auto;
}

.flash {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 18px;
  font-size: 0.95rem;
}
.flash-success { background: var(--success-bg); color: var(--success-text); }
.flash-error { background: var(--error-bg); color: var(--error-text); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 10px;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.stat-label { color: var(--muted); font-size: 0.85rem; margin-bottom: 6px; }
.stat-value { font-size: 1.6rem; font-weight: 700; }

form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 14px;
}

input[type="text"], input[type="password"], input[type="number"], select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  align-items: end;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-small { padding: 6px 12px; font-size: 0.85rem; background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-small:hover { background: #e9ebee; }

.link-button {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0;
  text-decoration: underline;
}
.link-button.danger { color: var(--danger); }

.inline-form { display: inline; margin: 0; }
.inline-input { width: 100%; }

.table-wrap { overflow-x: auto; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.table th, .table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: #fafbfc; }

.actions-cell { display: flex; gap: 10px; align-items: center; white-space: nowrap; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }

.muted-text { color: var(--muted); font-size: 0.9rem; margin-bottom: 16px; }
.muted-link { margin-top: 14px; font-size: 0.9rem; }
.muted-link a { color: var(--muted); }

fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 18px;
  padding: 14px 16px 6px;
}

legend {
  padding: 0 8px;
  font-weight: 600;
  color: var(--text);
}

.denom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}

.denom-label span { font-size: 0.85rem; }
.denom-label small { color: var(--muted); display: block; font-size: 0.75rem; }

.note-label { max-width: 400px; }

@media (max-width: 640px) {
  .topbar-inner { flex-direction: column; align-items: flex-start; }
  .container { padding: 16px; }
}