:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #f9fafb;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", Arial, sans-serif; color: var(--text); background: #fff; line-height: 1.6; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header { border-bottom: 1px solid var(--border); padding: 16px 0; }
.header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.logo { display: flex; align-items: center; }
.logo-img { height: 36px; width: auto; display: block; }
.main-nav a { margin-left: 18px; font-size: 14px; color: var(--text); }
.main-nav .btn-nav { background: var(--primary); color: #fff; padding: 8px 16px; border-radius: 8px; }
.main-nav .btn-nav:hover { background: var(--primary-dark); text-decoration: none; }

main { min-height: 60vh; padding: 32px 0; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }

.hero { text-align: center; padding: 60px 0; }
.hero h1 { font-size: 40px; margin-bottom: 12px; }
.hero p { color: var(--muted); font-size: 18px; max-width: 600px; margin: 0 auto 28px; }
.hero .btn { margin: 0 6px; }

.btn { display: inline-block; padding: 12px 22px; border-radius: 8px; font-weight: 600; cursor: pointer; border: none; font-size: 14px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; color: #fff; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg); text-decoration: none; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: box-shadow .15s; background: #fff; }
.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.card-thumb { width: 100%; height: 180px; background: linear-gradient(135deg,#e0e7ff,#c7d2fe); display: flex; align-items: center; justify-content: center; color: var(--primary); font-weight: 600; }
.card-thumb-img { width: 100%; height: 180px; object-fit: cover; object-position: center; display: block; background: var(--bg); }
.card-body { padding: 16px; }
.card-body h3 { margin: 0 0 6px; font-size: 16px; }
.card-meta { color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.card-tags span { display: inline-block; background: var(--bg); border-radius: 6px; padding: 2px 8px; font-size: 12px; margin: 0 4px 4px 0; color: var(--muted); }

.section-title { font-size: 26px; margin-bottom: 24px; }

.pricing-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 30px 0; }
.plan-card { border: 1px solid var(--border); border-radius: 12px; padding: 24px; text-align: center; }
.plan-card.featured { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary); }
.plan-price { font-size: 32px; font-weight: 700; margin: 12px 0; }
.plan-price small { font-size: 14px; font-weight: 400; color: var(--muted); }
.plan-features { list-style: none; padding: 0; margin: 20px 0; text-align: left; font-size: 14px; }
.plan-features li { padding: 6px 0; border-top: 1px solid var(--border); }

form.form-box { max-width: 420px; margin: 0 auto; }
.form-box, .content-box { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
label { display: block; margin: 14px 0 6px; font-weight: 600; font-size: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit;
}
textarea { min-height: 120px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
table th, table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
table th { background: var(--bg); }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-green { background: #d1fae5; color: #065f46; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-gray { background: #e5e7eb; color: #374151; }

.admin-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 24px; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
.admin-nav a { padding: 6px 12px; border-radius: 6px; font-size: 14px; }
.admin-nav a.active, .admin-nav a:hover { background: var(--bg); text-decoration: none; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 30px; }
.stat-box { border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.stat-box .num { font-size: 28px; font-weight: 700; }
.stat-box .label { color: var(--muted); font-size: 13px; }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0; text-align: center; color: var(--muted); font-size: 14px; margin-top: 60px; }

.detail-header { display: flex; gap: 30px; flex-wrap: wrap; margin-bottom: 30px; }
.detail-thumb { flex: 1 1 320px; height: 280px; background: linear-gradient(135deg,#e0e7ff,#c7d2fe); border-radius: 12px; }
.detail-thumb-img { flex: 1 1 320px; width: 100%; max-width: 500px; height: 280px; border-radius: 12px; object-fit: cover; object-position: center; display: block; background: var(--bg); }
.detail-info { flex: 1 1 320px; }
.included-list { list-style: none; padding: 0; }
.included-list li:before { content: "✓ "; color: #059669; font-weight: 700; }