/* ═══════════════════════════════════════════════════════════════════════════
   Hotel Reservation App — Design System & Global Styles
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ─── Custom Properties ─────────────────────────────────────────────────── */
:root {
  /* Colors */
  --clr-bg:         #0a0a0f;
  --clr-surface:    #12121a;
  --clr-surface-2:  #1a1a28;
  --clr-border:     rgba(255, 215, 100, 0.15);
  --clr-gold:       #d4a843;
  --clr-gold-light: #f0c86a;
  --clr-gold-dark:  #a07820;
  --clr-text:       #e8e3d8;
  --clr-text-muted: #8a8070;
  --clr-white:      #ffffff;
  --clr-error:      #e05252;
  --clr-success:    #52c07a;

  /* Typography */
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'Inter', system-ui, sans-serif;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   48px;
  --space-2xl:  80px;
  --space-3xl: 120px;

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  /* Shadows */
  --shadow-card:  0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-gold:  0 0 30px rgba(212, 168, 67, 0.2);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; object-fit: cover; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ─── Utility ────────────────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ─── Navbar ─────────────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  transition: var(--transition);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.navbar-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-gold);
  letter-spacing: 0.02em;
}
.navbar-tagline {
  font-size: 0.7rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}
.navbar-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  transition: color var(--transition);
}
.navbar-nav a:hover, .navbar-nav a.active { color: var(--clr-gold); }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition);
}
.btn-gold {
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-dark));
  color: #0a0a0f;
  box-shadow: 0 4px 20px rgba(212, 168, 67, 0.35);
}
.btn-gold:hover {
  background: linear-gradient(135deg, var(--clr-gold-light), var(--clr-gold));
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212, 168, 67, 0.5);
}
.btn-outline {
  border: 1px solid var(--clr-gold);
  color: var(--clr-gold);
}
.btn-outline:hover {
  background: rgba(212, 168, 67, 0.1);
  transform: translateY(-2px);
}
.btn-full { width: 100%; }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ─── Section Headings ───────────────────────────────────────────────────── */
.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-gold);
  margin-bottom: var(--space-md);
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-white);
}
.section-desc {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  max-width: 560px;
  margin-top: var(--space-md);
}

/* ─── Cards ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover), var(--shadow-gold);
}
.card-img {
  height: 220px;
  position: relative;
  overflow: hidden;
}
.card-img img {
  height: 100%;
  transition: transform 0.6s ease;
}
.card:hover .card-img img { transform: scale(1.05); }
.card-badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: 4px 14px;
  border-radius: 99px;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--clr-gold);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-gold);
}
.card-body { padding: var(--space-lg); }
.card-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
}
.card-text {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}
.card-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}
.card-price-amount {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--clr-gold);
}
.card-price-unit {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
}
.card-amenities {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}
.amenity-tag {
  padding: 3px 10px;
  border-radius: 99px;
  background: rgba(212, 168, 67, 0.1);
  border: 1px solid rgba(212, 168, 67, 0.2);
  font-size: 0.72rem;
  color: var(--clr-gold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-md);
}
.card-meta span { display: flex; align-items: center; gap: 4px; }

/* ─── Forms ──────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: var(--space-lg); }
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-sm);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-text);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--clr-gold);
  box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.15);
}
.form-input::placeholder { color: var(--clr-text-muted); }
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%238a8070'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 20px;
  padding-right: 44px;
}
.form-select option { background: var(--clr-surface-2); }
.form-error {
  font-size: 0.8rem;
  color: var(--clr-error);
  margin-top: var(--space-xs);
}
.form-grid { display: grid; gap: var(--space-md); }
.form-grid-2 { grid-template-columns: 1fr 1fr; }

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  height: 100%;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 10, 15, 0.85) 0%,
    rgba(10, 10, 15, 0.6) 50%,
    rgba(10, 10, 15, 0.85) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--clr-white);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}
.hero-title span { color: var(--clr-gold); }
.hero-subtitle {
  font-size: 1.2rem;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 480px;
}
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

/* ─── Stats Strip ────────────────────────────────────────────────────────── */
.stats-strip {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  padding: var(--space-xl) 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}
.stat-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--clr-gold);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ─── Section ────────────────────────────────────────────────────────────── */
.section { padding: var(--space-3xl) 0; }
.section-header { margin-bottom: var(--space-2xl); }

/* ─── Rooms Grid ─────────────────────────────────────────────────────────── */
.rooms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}

/* ─── Filter Bar ─────────────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: var(--space-md);
  align-items: flex-end;
  flex-wrap: wrap;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.filter-bar .form-group { margin-bottom: 0; flex: 1; min-width: 160px; }

/* ─── Reservation Form Page ──────────────────────────────────────────────── */
.reservation-page {
  padding-top: 100px;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
}
.reservation-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-xl);
  align-items: start;
  width: 100%;
  padding: var(--space-xl) 0 var(--space-3xl);
}
.reservation-form-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}
.reservation-summary {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  position: sticky;
  top: 100px;
}
.summary-room-img {
  height: 180px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}
.summary-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
}
.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.875rem;
}
.summary-row:last-child { border-bottom: none; }
.summary-row-label { color: var(--clr-text-muted); }
.summary-row-value { color: var(--clr-text); font-weight: 500; }
.summary-total .summary-row-label { color: var(--clr-text); font-weight: 600; }
.summary-total .summary-row-value {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--clr-gold);
}

/* ─── Steps ──────────────────────────────────────────────────────────────── */
.form-steps {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.form-step {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  flex: 1;
}
.form-step.active { color: var(--clr-gold); }
.form-step.done { color: var(--clr-success); }
.step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  flex-shrink: 0;
}
.form-step.active .step-num {
  background: var(--clr-gold);
  border-color: var(--clr-gold);
  color: #0a0a0f;
}
.form-step.done .step-num {
  background: var(--clr-success);
  border-color: var(--clr-success);
  color: #0a0a0f;
}

/* ─── Confirmation Page ──────────────────────────────────────────────────── */
.confirmation-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-3xl) 0;
}
.confirmation-card {
  max-width: 680px;
  margin: 0 auto;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.confirmation-header {
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  padding: var(--space-xl);
  text-align: center;
}
.confirmation-icon {
  width: 72px; height: 72px;
  background: rgba(0,0,0,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 2rem;
}
.confirmation-header h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: #0a0a0f;
  margin-bottom: var(--space-sm);
}
.confirmation-header p { color: rgba(10,10,15,0.7); font-size: 0.9rem; }
.confirmation-code-box {
  background: rgba(0,0,0,0.15);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-top: var(--space-md);
  display: inline-block;
}
.confirmation-code {
  font-family: 'Courier New', monospace;
  font-size: 1.4rem;
  font-weight: 700;
  color: #0a0a0f;
  letter-spacing: 0.1em;
}
.confirmation-body { padding: var(--space-xl); }
.confirmation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.confirmation-item {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.confirmation-item-label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: 4px;
}
.confirmation-item-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-white);
}
.confirmation-total {
  background: linear-gradient(135deg, rgba(212,168,67,0.1), rgba(212,168,67,0.05));
  border: 1px solid rgba(212,168,67,0.3);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
}
.confirmation-total-label { font-weight: 600; }
.confirmation-total-amount {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-gold);
}
.confirmation-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ─── Loading Spinner ────────────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(10,10,15,0.3);
  border-top-color: #0a0a0f;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Alerts / Toasts ────────────────────────────────────────────────────── */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
}
.alert-error {
  background: rgba(224, 82, 82, 0.1);
  border: 1px solid rgba(224, 82, 82, 0.3);
  color: #f08080;
}
.alert-success {
  background: rgba(82, 192, 122, 0.1);
  border: 1px solid rgba(82, 192, 122, 0.3);
  color: #80d8a0;
}

/* ─── Divider ────────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--clr-border);
  margin: var(--space-lg) 0;
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-xl) 0 var(--space-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.footer-brand { font-family: var(--font-serif); font-size: 1.5rem; color: var(--clr-gold); }
.footer-desc { font-size: 0.875rem; color: var(--clr-text-muted); margin-top: var(--space-sm); }
.footer-heading { font-size: 0.75rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--clr-gold); margin-bottom: var(--space-md); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: var(--space-sm); }
.footer-links a { font-size: 0.875rem; color: var(--clr-text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--clr-text); }
.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ─── Skeleton Loader ────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--clr-surface) 25%, var(--clr-surface-2) 50%, var(--clr-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ─── Empty State ────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}
.empty-state-icon { font-size: 3rem; margin-bottom: var(--space-md); }
.empty-state-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
}
.empty-state-text { color: var(--clr-text-muted); }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .reservation-layout { grid-template-columns: 1fr; }
  .form-grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .confirmation-grid { grid-template-columns: 1fr; }
  .navbar-nav { display: none; }
  .hero-actions { flex-direction: column; }
}
@media (max-width: 480px) {
  .rooms-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
}