/* ===================================
   เว็บไซต์ไทย - สยามสวรรค์
   HTML และ CSS ล้วน
   =================================== */

/* ตัวแปร CSS / โทเค็นการออกแบบ */
:root {
  /* สี */
  --color-gold: #C9A227;
  --color-gold-light: #E8D190;
  --color-gold-dark: #9A7B1A;
  --color-burgundy: #8B1E3F;
  --color-burgundy-dark: #5C1429;
  --color-cream: #FDF8F0;
  --color-cream-dark: #F5EDE0;
  --color-charcoal: #1A1A1A;
  --color-charcoal-light: #2D2D2D;
  --color-white: #FFFFFF;
  --color-gray-100: #F7F7F7;
  --color-gray-200: #E5E5E5;
  --color-gray-400: #9CA3AF;
  --color-gray-600: #4B5563;
  --color-gray-800: #1F2937;
  
  /* ตัวอักษร */
  --font-thai: 'Prompt', 'Noto Sans Thai', sans-serif;
  --font-display: 'Sarabun', 'Prompt', sans-serif;
  --font-body: 'Prompt', 'Noto Sans Thai', sans-serif;
  
  /* ระยะห่าง */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* มุมโค้ง */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  
  /* การเปลี่ยนแปลง */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* เงา */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-charcoal);
  background-color: var(--color-cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

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

/* ตัวอักษร */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-charcoal);
}

/* ปุ่ม */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.btn-primary:hover {
  background-color: var(--color-burgundy);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* ===================================
   ส่วนหัวและเมนูนำทาง
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(253, 248, 240, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-cream-dark);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-thai {
  font-family: var(--font-thai);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-burgundy);
}

.logo-en {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-gray-600);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-sm) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--color-charcoal);
}

.nav-links a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-charcoal);
  transition: all var(--transition-base);
}

/* ===================================
   ส่วนฮีโร่
   =================================== */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  padding-top: 80px;
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-4xl);
  padding-right: var(--space-2xl);
}

.hero-subtitle {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gold-dark);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-family: var(--font-thai);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 500px;
}

.hero-image {
  position: relative;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: var(--space-4xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.hero-scroll span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
}

.scroll-indicator {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
  animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===================================
   รูปแบบส่วนต่างๆ
   =================================== */
.section-header {
  margin-bottom: var(--space-3xl);
}

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

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gold-dark);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  max-width: 600px;
}

.section-header-center .section-description {
  margin: 0 auto;
}

/* ===================================
   ส่วนเกี่ยวกับ
   =================================== */
.about {
  padding: var(--space-4xl) 0;
  background-color: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-text {
  font-size: 1.0625rem;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.about-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-burgundy);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.about-image:hover img {
  transform: scale(1.05);
}

/* ===================================
   ส่วนสถานที่ท่องเที่ยว
   =================================== */
.destinations {
  padding: var(--space-4xl) 0;
  background-color: var(--color-cream);
}

.destinations-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-lg);
}

.destination-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/10;
  cursor: pointer;
}

.destination-card-large {
  grid-row: span 2;
  aspect-ratio: auto;
}

.destination-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.destination-card:hover img {
  transform: scale(1.1);
}

.destination-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-xl);
  color: var(--color-white);
  transition: background var(--transition-base);
}

.destination-card:hover .destination-overlay {
  background: linear-gradient(to top, rgba(139, 30, 63, 0.9) 0%, rgba(139, 30, 63, 0.3) 50%, transparent 100%);
}

.destination-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold-light);
  margin-bottom: var(--space-sm);
}

.destination-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.destination-desc {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.5;
}

/* ===================================
   ส่วนอาหาร
   =================================== */
.cuisine {
  padding: var(--space-4xl) 0;
  background-color: var(--color-charcoal);
  color: var(--color-white);
}

.cuisine .section-label {
  color: var(--color-gold-light);
}

.cuisine .section-title {
  color: var(--color-white);
}

.cuisine-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.cuisine-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.cuisine-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cuisine-text {
  font-size: 1.0625rem;
  color: var(--color-gray-400);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
}

.cuisine-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.cuisine-list li {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-charcoal-light);
}

.cuisine-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.cuisine-item-name {
  font-family: var(--font-thai);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-white);
}

.cuisine-item-desc {
  font-size: 0.875rem;
  color: var(--color-gray-400);
}

/* ===================================
   ส่วนประสบการณ์
   =================================== */
.experiences {
  padding: var(--space-4xl) 0;
  background-color: var(--color-white);
}

.experiences-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.experience-card {
  text-align: center;
  padding: var(--space-2xl);
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.experience-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  background-color: var(--color-white);
}

.experience-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background-color: var(--color-white);
  border-radius: 50%;
  margin-bottom: var(--space-lg);
  color: var(--color-burgundy);
  transition: all var(--transition-base);
}

.experience-card:hover .experience-icon {
  background-color: var(--color-burgundy);
  color: var(--color-white);
}

.experience-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: var(--space-sm);
}

.experience-desc {
  font-size: 0.9375rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* ===================================
   ส่วนติดต่อ
   =================================== */
.contact {
  padding: var(--space-4xl) 0;
  background-color: var(--color-cream);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info .section-title {
  margin-bottom: var(--space-lg);
}

.contact-text {
  font-size: 1.0625rem;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-gray-600);
}

.contact-item svg {
  color: var(--color-burgundy);
  flex-shrink: 0;
}

.contact-form {
  background-color: var(--color-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-lg);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-charcoal);
  background-color: var(--color-cream);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-gray-400);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===================================
   ส่วนท้าย
   =================================== */
.footer {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-charcoal-light);
}

.footer-brand .logo-thai {
  color: var(--color-gold);
}

.footer-brand .logo-en {
  color: var(--color-gray-400);
}

.footer-tagline {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-gray-400);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-column h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-column a {
  font-size: 0.9375rem;
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-gold-light);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

.footer-bottom .heart {
  color: var(--color-burgundy);
}

/* ===================================
   การออกแบบตอบสนอง
   =================================== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  
  .hero-content {
    padding: var(--space-4xl) var(--space-xl);
    order: 2;
  }
  
  .hero-image {
    order: 1;
    height: 60vh;
  }
  
  .hero-scroll {
    display: none;
  }
  
  .about-grid,
  .cuisine-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
  
  .cuisine-image {
    order: -1;
  }
  
  .experiences-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .destinations-grid {
    grid-template-columns: 1fr;
  }
  
  .destination-card-large {
    grid-row: span 1;
    aspect-ratio: 16/10;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-cream);
    flex-direction: column;
    padding: var(--space-lg);
    gap: 0;
    border-bottom: 1px solid var(--color-cream-dark);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-links li {
    border-bottom: 1px solid var(--color-cream-dark);
  }
  
  .nav-links li:last-child {
    border-bottom: none;
  }
  
  .nav-links a {
    display: block;
    padding: var(--space-md) 0;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero-content {
    padding: var(--space-2xl) var(--space-lg);
  }
  
  .hero-image {
    height: 50vh;
  }
  
  .about-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .experiences-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root {
    --space-4xl: 4rem;
    --space-3xl: 3rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .destination-name {
    font-size: 1.25rem;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .contact-form {
    padding: var(--space-lg);
  }
}

/* ===================================
   คลาสยูทิลิตี้
   =================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===================================
   แอนิเมชัน
   =================================== */
.animate-ready {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* แอนิเมชันหน่วงเวลา */
.destination-card:nth-child(1) { transition-delay: 0s; }
.destination-card:nth-child(2) { transition-delay: 0.1s; }
.destination-card:nth-child(3) { transition-delay: 0.2s; }

.experience-card:nth-child(1) { transition-delay: 0s; }
.experience-card:nth-child(2) { transition-delay: 0.1s; }
.experience-card:nth-child(3) { transition-delay: 0.2s; }
.experience-card:nth-child(4) { transition-delay: 0.3s; }

.stat:nth-child(1) { transition-delay: 0s; }
.stat:nth-child(2) { transition-delay: 0.15s; }
.stat:nth-child(3) { transition-delay: 0.3s; }

.cuisine-list li:nth-child(1) { transition-delay: 0s; }
.cuisine-list li:nth-child(2) { transition-delay: 0.1s; }
.cuisine-list li:nth-child(3) { transition-delay: 0.2s; }
.cuisine-list li:nth-child(4) { transition-delay: 0.3s; }

/* เมนูมือถือแอคทีฟ */
.nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ส่วนหัวเมื่อเลื่อนหน้า */
.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}