/* ========================================
   Modern Design System - Room Service Website
   ======================================== */

/* === CSS Variables === */
:root {
  /* Colors */
  --primary-color: #0056b3;
  --primary-dark: #003d82;
  --secondary-color: #6c757d;
  --accent-color: #17a2b8;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  
  /* Backgrounds */
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --bg-dark: #212529;
  
  /* Text */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-light: #ffffff;
  
  /* Spacing */
  --section-padding: 4rem 0;
  --card-padding: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* Transitions */
  --transition-base: all 0.3s ease;
}

/* === Global Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Kanit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background-color: var(--bg-white);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }

p {
  margin-bottom: 1rem;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* === Navigation === */
.navbar {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  transition: var(--transition-base);
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  transition: var(--transition-base);
}

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

/* === Hero Section === */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--text-light);
  padding: 5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,96C1248,75,1344,53,1392,42.7L1440,32L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
  background-size: cover;
  opacity: 0.3;
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-section p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-section .btn {
  margin: 0.5rem;
}

/* === Sections === */
.section {
  padding: var(--section-padding);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.section-title p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* === Cards === */
.service-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--card-padding);
  transition: var(--transition-base);
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.service-card .icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--text-light);
  font-size: 1.75rem;
}

.service-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-align: center;
}

.service-card p {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 1.5rem;
}

.service-card .btn {
  width: 100%;
}

/* === Room Cards === */
.room-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
  height: 100%;
}

.room-card:hover {
  box-shadow: var(--shadow-lg);
}

.room-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.room-card-body {
  padding: 1.5rem;
}

.room-card-body h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.room-card-body .features {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.room-card-body .features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--bg-light);
  display: flex;
  align-items: center;
}

.room-card-body .features li i {
  color: var(--primary-color);
  margin-right: 0.75rem;
  font-size: 1.1rem;
}

/* === Buttons === */
.btn {
  border-radius: var(--radius-md);
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  transition: var(--transition-base);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline-primary:hover {
  background-color: var(--primary-color);
  color: var(--text-light);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* === Footer === */
.footer {
  background-color: var(--bg-dark);
  color: var(--text-light);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer h5 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.footer ul {
  list-style: none;
  padding: 0;
}

.footer ul li {
  margin-bottom: 0.75rem;
}

.footer ul li a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition-base);
}

.footer ul li a:hover {
  color: var(--text-light);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 2rem;
  padding-top: 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* === Utilities === */
.bg-light-custom {
  background-color: var(--bg-light);
}

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

/* === Responsive === */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }
  
  .hero-section p {
    font-size: 1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}