/* ============================================
   BOOKING 2026 - Modern Design System
   ============================================ */

/* ------------ CSS Variables ------------ */
:root {
  /* Colors - Light Mode */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary: #ec4899;
  --secondary-hover: #db2777;
  --success: #22c55e;
  --success-light: #86efac;
  --warning: #f59e0b;
  --warning-light: #fcd34d;
  --danger: #ef4444;
  --danger-light: #fca5a5;

  /* Neutrals */
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-blur: blur(16px);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;

  /* Font */
  --font-sans: 'Inter', 'Noto Sans Thai', system-ui, -apple-system, sans-serif;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --surface: #1e293b;
  --surface-hover: #334155;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-light: #64748b;

  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(51, 65, 85, 0.5);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* ------------ Base Styles ------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* ------------ Typography ------------ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

.text-muted {
  color: var(--text-muted);
}

.text-light {
  color: var(--text-light);
}

.text-primary {
  color: var(--primary);
}

.text-success {
  color: var(--success);
}

.text-warning {
  color: var(--warning);
}

.text-danger {
  color: var(--danger);
}

/* ------------ Layout ------------ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-sm {
  max-width: 640px;
}

.container-md {
  max-width: 768px;
}

.container-lg {
  max-width: 1024px;
}

/* ------------ Gradient Backgrounds ------------ */
.gradient-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.gradient-hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

.gradient-dark {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

/* ------------ Cards ------------ */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-6);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

/* ------------ Buttons ------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
}

.btn-secondary:hover {
  background: var(--secondary-hover);
  color: white;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background: var(--bg-alt);
  color: var(--text);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius);
}

/* ------------ Forms ------------ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-input::placeholder {
  color: var(--text-light);
}

/* Floating Labels */
.form-floating {
  position: relative;
}

.form-floating .form-input {
  padding-top: var(--space-6);
}

.form-floating .form-label {
  position: absolute;
  top: 50%;
  left: var(--space-4);
  transform: translateY(-50%);
  transition: var(--transition);
  pointer-events: none;
  color: var(--text-light);
  margin: 0;
}

.form-floating .form-input:focus~.form-label,
.form-floating .form-input:not(:placeholder-shown)~.form-label {
  top: var(--space-2);
  transform: translateY(0);
  font-size: 0.75rem;
  color: var(--primary);
}

/* ------------ Badges ------------ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-primary {
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* ------------ Tables ------------ */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

.table th,
.table td {
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table th {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-alt);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table tbody tr {
  transition: var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--surface-hover);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ------------ Alerts ------------ */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: var(--success);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--warning);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--danger);
}

.alert-info {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--primary);
}

/* ------------ Header ------------ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-4) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  border: none;
  background: var(--bg-alt);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.theme-toggle:hover {
  background: var(--primary);
  color: white;
}

/* ------------ Hero Section (Enhanced) ------------ */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(120, 0, 255, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 0, 150, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(0, 200, 255, 0.2) 0%, transparent 40%);
  z-index: 1;
}

/* Hero Particles */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

.hero-particles::before,
.hero-particles::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 8s ease-in-out infinite;
}

.hero-particles::before {
  background: rgba(139, 92, 246, 0.4);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.hero-particles::after {
  background: rgba(236, 72, 153, 0.4);
  bottom: -100px;
  right: -100px;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 10;
  max-width: 900px;
  padding: var(--space-8) var(--space-4);
}

/* Hero Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.hero-badge::before {
  content: '🔥';
  font-size: 1rem;
}

/* Hero Title */
.hero-title {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: var(--space-6);
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #a855f7, #ec4899, #f97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hero Subtitle */
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

/* Hero CTA Buttons */
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.btn-outline-light {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.5);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
}

/* Hero Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: bounce 2s infinite;
}

.hero-scroll-icon {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.hero-scroll-icon::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 2px;
  animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* Dark Mode Adjustments for Hero */
[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #16213e 100%);
}

/* Hero Responsive */
@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
  }
  
  .hero-title {
    font-size: clamp(2rem, 8vw, 3rem);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .hero-scroll {
    display: none;
  }
}

/* ------------ Stats Grid ------------ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ------------ Calendar Styles ------------ */
.calendar-container {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

/* FullCalendar Overrides */
.fc {
  --fc-border-color: var(--border);
  --fc-button-bg-color: var(--primary);
  --fc-button-border-color: var(--primary);
  --fc-button-hover-bg-color: var(--primary-hover);
  --fc-button-hover-border-color: var(--primary-hover);
  --fc-button-active-bg-color: var(--primary-hover);
  --fc-today-bg-color: rgba(99, 102, 241, 0.1);
  --fc-event-bg-color: var(--success);
  --fc-event-border-color: var(--success);
}

.fc-event {
  border-radius: var(--radius) !important;
  padding: var(--space-1) var(--space-2) !important;
  font-weight: 500 !important;
  cursor: pointer !important;
  transition: var(--transition) !important;
}

.fc-event:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.fc-daygrid-event-dot {
  display: none;
}

/* ------------ Animations ------------ */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.5s ease forwards;
}

.animate-slideUp {
  animation: slideUp 0.5s ease forwards;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

/* Staggered animations */
.animate-delay-1 {
  animation-delay: 0.1s;
}

.animate-delay-2 {
  animation-delay: 0.2s;
}

.animate-delay-3 {
  animation-delay: 0.3s;
}

.animate-delay-4 {
  animation-delay: 0.4s;
}

/* ------------ Footer ------------ */
.footer {
  margin-top: var(--space-16);
  padding: var(--space-8) 0;
  background: var(--bg-alt);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ------------ Utilities ------------ */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

/* ------------ Mobile Menu ------------ */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
  padding: var(--space-2);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--surface);
  z-index: 200;
  flex-direction: column;
  padding: var(--space-6);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.mobile-nav.show {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.mobile-nav-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav-link {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--primary);
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 150;
}

.mobile-nav-overlay.show {
  display: block;
}

/* ------------ Responsive ------------ */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .mobile-nav {
    display: flex;
  }

  .hero {
    padding: var(--space-10) 0;
  }

  .card {
    padding: var(--space-4);
  }

  .btn-lg {
    padding: var(--space-3) var(--space-6);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .header-inner {
    gap: var(--space-3);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}