:root {
  --bg: #0b0e14;
  --bg-soft: #11151f;
  --card: #161b26;
  --border: #232a38;
  --text: #e6e9f0;
  --text-muted: #8b93a7;
  --accent: #6c5ce7;
  --accent-2: #00d2b4;
  --accent-grad: linear-gradient(135deg, #6c5ce7 0%, #00d2b4 100%);
  --danger: #ff6b81;
  --radius: 14px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

a { color: inherit; text-decoration: none; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11,14,20,0.85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; }
.logo { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.logo span { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav { display: flex; align-items: center; gap: 28px; font-weight: 500; }
.nav a:hover { color: var(--accent-2); }
.btn-nav { background: var(--accent-grad); padding: 10px 18px; border-radius: 999px; color: #fff !important; font-weight: 600; }

/* Hero */
.hero { padding: 100px 0 70px; text-align: center; }
.badge {
  display: inline-block; padding: 6px 14px; border: 1px solid var(--border);
  border-radius: 999px; font-size: 13px; color: var(--accent-2); margin-bottom: 24px;
  background: var(--bg-soft);
}
.hero h1 { font-size: 48px; font-weight: 800; letter-spacing: -1px; margin-bottom: 20px; }
.hero-desc { max-width: 620px; margin: 0 auto 34px; color: var(--text-muted); font-size: 17px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; }

.btn {
  display: inline-block; padding: 13px 26px; border-radius: 10px; font-weight: 600;
  font-size: 15px; cursor: pointer; border: none; transition: transform .15s ease, opacity .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent-grad); color: #fff; }
.btn-outline { border: 1px solid var(--border); color: var(--text); }
.btn-sm { padding: 8px 16px; font-size: 13px; background: var(--bg-soft); border: 1px solid var(--border); }
.btn-block { width: 100%; text-align: center; margin-top: 8px; }

/* Features */
.features { padding: 60px 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; text-align: center;
}
.feature-icon { font-size: 30px; margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; margin-bottom: 10px; }
.feature-card p { color: var(--text-muted); font-size: 14.5px; }

/* Services */
.services-preview, .services-page { padding: 60px 0; }
.services-preview h2 { font-size: 28px; margin-bottom: 28px; }
.service-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 22px; }
.service-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; gap: 10px;
}
.service-card h3 { font-size: 18px; }
.service-card p { color: var(--text-muted); font-size: 14px; flex-grow: 1; }
.service-price { font-weight: 700; color: var(--accent-2); font-size: 17px; }

/* Page header */
.page-header { padding: 60px 0 20px; text-align: center; }
.page-header h1 { font-size: 34px; margin-bottom: 10px; }
.page-header p { color: var(--text-muted); }

/* Detail */
.detail-page { padding: 40px 0 80px; }
.detail-box {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; max-width: 640px; margin: 0 auto; text-align: center;
}
.detail-desc { color: var(--text-muted); margin-bottom: 18px; }
.detail-price { font-size: 26px; font-weight: 800; color: var(--accent-2); margin-bottom: 24px; }

/* Booking form */
.booking-page { padding: 40px 0 90px; }

/* Bẫy honeypot: ẩn khỏi người dùng thật bằng CSS, nhưng vẫn nằm trong DOM nên bot vẫn "thấy" và điền */
.bv-hp { position: absolute; left: -9999px; top: -9999px; height: 0; width: 0; overflow: hidden; }

.booking-form {
  max-width: 560px; margin: 0 auto; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 34px; display: flex; flex-direction: column; gap: 6px;
}
.booking-form label { font-size: 13.5px; color: var(--text-muted); margin-top: 14px; }
.booking-form input, .booking-form select, .booking-form textarea {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; color: var(--text); font-size: 14.5px; font-family: inherit;
}
.booking-form input:focus, .booking-form select:focus, .booking-form textarea:focus {
  outline: none; border-color: var(--accent);
}
.error { color: var(--danger); font-size: 13px; margin-top: 2px; }

/* Success / Error pages */
.success-page, .error-page { padding: 100px 0; text-align: center; }
.success-box, .error-box {
  max-width: 480px; margin: 0 auto; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 46px 34px;
}
.success-icon {
  width: 60px; height: 60px; border-radius: 50%; background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center; font-size: 26px; color: #fff;
  margin: 0 auto 20px;
}
.error-box h1 { font-size: 60px; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.success-box h1 { margin-bottom: 12px; }
.success-box p, .error-box p { color: var(--text-muted); margin-bottom: 22px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 26px 0; text-align: center; color: var(--text-muted); font-size: 13.5px; }

/* ================= ADMIN PANEL ================= */

.login-page { min-height: 80vh; display: flex; align-items: center; justify-content: center; padding: 40px 20px; }
.login-box {
  width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 34px;
}
.login-logo { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.login-logo span { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.login-box h1 { font-size: 18px; color: var(--text-muted); font-weight: 500; margin-bottom: 22px; }
.login-box label { font-size: 13.5px; color: var(--text-muted); display: block; margin-top: 14px; margin-bottom: 6px; }
.login-box input {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; color: var(--text); font-size: 14.5px;
}
.alert-error {
  background: rgba(255,107,129,0.1); border: 1px solid var(--danger); color: var(--danger);
  padding: 10px 14px; border-radius: 8px; font-size: 13.5px; margin-bottom: 6px;
}

.admin-shell { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 220px; flex-shrink: 0; background: var(--bg-soft); border-right: 1px solid var(--border);
  padding: 26px 18px; display: flex; flex-direction: column;
}
.admin-logo { font-size: 19px; font-weight: 800; margin-bottom: 30px; }
.admin-logo span { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.admin-logo small { display: block; color: var(--text-muted); font-weight: 400; font-size: 12px; margin-top: 2px; }
.admin-nav { display: flex; flex-direction: column; gap: 4px; flex-grow: 1; }
.admin-nav a { padding: 10px 12px; border-radius: 8px; font-size: 14px; color: var(--text-muted); }
.admin-nav a:hover { background: var(--card); color: var(--text); }
.admin-logout-form { margin-top: auto; }
.admin-logout-btn {
  width: 100%; background: transparent; border: 1px solid var(--border); color: var(--text-muted);
  padding: 9px; border-radius: 8px; cursor: pointer; font-size: 13.5px;
}
.admin-logout-btn:hover { color: var(--danger); border-color: var(--danger); }

.admin-content { flex-grow: 1; padding: 30px 36px; max-width: 1100px; }
.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.admin-header h1 { font-size: 24px; }
.admin-count { color: var(--text-muted); font-size: 13.5px; }
.db-badge {
  font-size: 11.5px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border);
  color: var(--accent-2);
}

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 34px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.stat-number { font-size: 30px; font-weight: 800; color: var(--accent-2); }
.stat-label { color: var(--text-muted); font-size: 13.5px; margin-top: 4px; }

.admin-subheading { font-size: 17px; margin-bottom: 14px; }

.admin-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.admin-table th, .admin-table td { padding: 12px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border); }
.admin-table th { color: var(--text-muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.admin-table tr:last-child td { border-bottom: none; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; text-transform: capitalize; }
.badge-pending { background: rgba(255,193,7,0.15); color: #ffc107; }
.badge-confirmed { background: rgba(0,210,180,0.15); color: var(--accent-2); }
.badge-completed { background: rgba(108,92,231,0.15); color: var(--accent); }
.badge-cancelled { background: rgba(255,107,129,0.15); color: var(--danger); }

.admin-actions { display: flex; align-items: center; gap: 10px; }
.inline-form { display: inline-flex; margin: 0; }
.inline-form select {
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 5px 8px; font-size: 13px;
}
.btn-icon, .btn-icon-danger {
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
  padding: 6px 12px; border-radius: 6px; font-size: 13px; cursor: pointer;
}
.btn-icon-danger:hover { color: var(--danger); border-color: var(--danger); }

.filter-bar { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.filter-chip { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); font-size: 13px; color: var(--text-muted); text-transform: capitalize; }
.filter-chip-active { background: var(--accent-grad); color: #fff; border-color: transparent; }

.pagination { display: flex; align-items: center; gap: 16px; margin-top: 20px; font-size: 13.5px; color: var(--text-muted); }
.pagination a { color: var(--accent-2); }

.admin-form {
  max-width: 560px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; gap: 4px;
}
.admin-form label { font-size: 13.5px; color: var(--text-muted); margin-top: 14px; }
.admin-form input, .admin-form textarea {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 14px; color: var(--text); font-size: 14.5px; font-family: inherit;
}

@media (max-width: 860px) {
  .admin-shell { flex-direction: column; }
  .admin-sidebar { width: 100%; flex-direction: row; align-items: center; padding: 14px 18px; }
  .admin-nav { flex-direction: row; }
  .admin-logout-form { margin-top: 0; margin-left: auto; }
  .admin-content { padding: 20px; }
  .stat-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .hero h1 { font-size: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .nav { gap: 14px; font-size: 14px; }
}