:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
}

* { 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);
  line-height: 1.5;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.navbar .brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; color: var(--primary); }
.navbar nav { display: flex; align-items: center; gap: 1rem; }
.navbar nav a { text-decoration: none; color: var(--text); font-weight: 500; }
.navbar nav a:hover { color: var(--primary); }
.navbar .user { color: var(--muted); font-size: 0.9rem; }

.container { max-width: 1000px; margin: 1.5rem auto; padding: 0 1rem; }

.footer { text-align: center; color: var(--muted); padding: 2rem 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

h1 { font-size: 1.6rem; margin: 0 0 1rem; }
h2 { font-size: 1.2rem; margin: 0 0 1rem; }
h3 { font-size: 1rem; margin: 0 0 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; flex-wrap: wrap; gap: 0.75rem; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn-secondary { background: #e5e7eb; color: var(--text); }
.btn-secondary:hover { background: #d1d5db; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-link { background: none; color: var(--text); padding: 0; }
.btn-link:hover { background: none; color: var(--primary); text-decoration: underline; }
.inline { display: inline; }

/* Forms */
.form-group { margin-bottom: 1rem; }
label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }
input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.help { color: var(--muted); font-size: 0.8rem; margin-top: 0.25rem; }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; }
.checkbox-row input { width: auto; }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; }
tr:last-child td { border-bottom: none; }
.text-right { text-align: right; }
.table-wrap { overflow-x: auto; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; }
.stat .label { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
.stat .value { font-size: 1.4rem; font-weight: 700; margin-top: 0.25rem; }
.stat .value.success { color: var(--success); }
.stat .value.warning { color: var(--warning); }
.stat .value.danger { color: var(--danger); }

/* Alerts */
.alert { padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; }
.alert-error { background: #fee2e2; color: var(--danger); border: 1px solid #fecaca; }
.alert-info { background: #dbeafe; color: var(--primary-dark); border: 1px solid #bfdbfe; }
.alert-warning { background: #fef3c7; color: var(--warning); border: 1px solid #fde68a; }

.badge { display: inline-block; padding: 0.15rem 0.6rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: #d1fae5; color: var(--success); }
.badge-open { background: #dbeafe; color: var(--primary-dark); }

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

.muted { color: var(--muted); }
.slug-link { font-family: monospace; background: #f1f5f9; padding: 0.15rem 0.4rem; border-radius: 4px; }

/* Login */
.auth-wrap { max-width: 380px; margin: 4rem auto; }

details.payment-edit { margin-top: 0.5rem; }
details.payment-edit summary { cursor: pointer; color: var(--primary); font-size: 0.85rem; }

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}