/* ==========================================================================
   Phuket Discovery Tour - Main Stylesheet
   ========================================================================== */

/* Design Tokens & Variables */
:root {
  /* Color Palette (HSL System) */
  --clr-primary: hsl(182, 85%, 36%);      /* Turquoise */
  --clr-primary-light: hsl(182, 85%, 46%);
  --clr-primary-dark: hsl(182, 85%, 26%);
  
  --clr-secondary: hsl(35, 95%, 52%);     /* Orange Sunset */
  --clr-secondary-light: hsl(35, 95%, 62%);
  
  --clr-dark: hsl(220, 24%, 12%);          /* Slate Navy */
  --clr-dark-light: hsl(220, 20%, 18%);
  --clr-dark-deep: hsl(220, 30%, 8%);
  
  --clr-light: hsl(220, 20%, 97%);         /* Soft Cool Gray */
  --clr-light-alt: hsl(220, 15%, 90%);
  
  --clr-white: hsl(0, 0%, 100%);
  --clr-text-dark: hsl(220, 15%, 20%);
  --clr-text-muted: hsl(220, 10%, 55%);
  --clr-text-light: hsl(220, 15%, 90%);
  
  /* Gradients */
  --grad-primary: linear-gradient(135deg, var(--clr-primary) 0%, hsl(200, 90%, 30%) 100%);
  --grad-accent: linear-gradient(135deg, var(--clr-secondary) 0%, hsl(12, 90%, 50%) 100%);
  --grad-dark: linear-gradient(180deg, var(--clr-dark) 0%, var(--clr-dark-deep) 100%);
  --grad-glass: linear-gradient(135deg, hsla(0, 0%, 100%, 0.08) 0%, hsla(0, 0%, 100%, 0.03) 100%);
  
  /* Shadows */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.06);
  --shadow-premium: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --border-glass: 1px solid hsla(0, 0%, 100%, 0.08);
  --border-light: 1px solid hsl(220, 15%, 85%);
  
  /* Typography Scale */
  --fs-hero: clamp(2.5rem, 5vw, 4.5rem);
  --fs-h2: clamp(1.8rem, 3.5vw, 2.8rem);
  --fs-h3: clamp(1.4rem, 2.5vw, 1.8rem);
  --fs-body: 1rem;
  --fs-sm: 0.875rem;
  
  /* Animation Timing */
  --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

body {
  font-family: 'Outfit', sans-serif;
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--clr-text-dark);
  background-color: var(--clr-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--clr-light);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-primary);
  border-radius: 5px;
  border: 2px solid var(--clr-light);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-primary-dark);
}

/* Typography elements */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--clr-dark);
}

p {
  margin-bottom: 1.5rem;
}

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

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

ul {
  list-style: none;
}

/* Layout Utilities */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2-col {
  grid-template-columns: 1fr;
}

.grid-3-col {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .grid-3-col {
    grid-template-columns: repeat(3, 1fr);
  }
}

.section-padding {
  padding: 5rem 0;
}

.section-padding-large {
  padding: 7rem 0;
}

.bg-light {
  background-color: var(--clr-light);
}

.bg-dark {
  background-color: var(--clr-dark);
}

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

.text-white {
  color: var(--clr-white) !important;
}

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

.mt-medium { margin-top: 2rem; }
.mt-large { margin-top: 3.5rem; }
.mb-medium { margin-bottom: 2rem; }
.mb-large { margin-bottom: 3.5rem; }
.max-w-600 {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Section tags and headers */
.section-tag {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--clr-primary);
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: var(--fs-h2);
  margin-bottom: 1.5rem;
}

.section-title-large {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  letter-spacing: 1px;
}

.section-desc {
  color: var(--clr-text-muted);
  font-size: 1.125rem;
}

.animated-divider {
  width: 80px;
  height: 4px;
  background: var(--grad-accent);
  margin: 1.5rem auto;
  border-radius: 2px;
  position: relative;
}

.animated-divider::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 20%;
  background: var(--clr-white);
  animation: slide-divider 3s infinite ease-in-out;
}

@keyframes slide-divider {
  0% { left: 0%; }
  50% { left: 80%; }
  100% { left: 0%; }
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-large {
  padding: 1.1rem 2.4rem;
  font-size: 1rem;
}

.btn-primary {
  background: var(--grad-primary);
  color: var(--clr-white);
  box-shadow: 0 4px 15px rgba(26, 158, 166, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(26, 158, 166, 0.6);
  color: var(--clr-white);
}

.btn-secondary {
  background: var(--grad-accent);
  color: var(--clr-white);
  box-shadow: 0 4px 15px rgba(255, 143, 0, 0.4);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 143, 0, 0.6);
  color: var(--clr-white);
}

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

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

.btn-outline-white {
  background: transparent;
  color: var(--clr-white);
  border-color: var(--clr-white);
}

.btn-outline-white:hover {
  background: var(--clr-white);
  color: var(--clr-dark);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

.btn-icon {
  gap: 0.8rem;
}

.btn-svg {
  transition: transform 0.3s ease;
}

.btn-icon:hover .btn-svg {
  transform: translate(3px, -3px);
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  padding: 1.5rem 0;
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  padding: 0.8rem 0;
  background: hsla(220, 24%, 12%, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  border-bottom: var(--border-glass);
}

.header-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  width: 45px;
  height: 45px;
  object-fit: contain;
}

.logo-text {
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--clr-white);
  letter-spacing: 0.5px;
}

.nav-list {
  display: none;
}

@media (min-width: 992px) {
  .nav-list {
    display: flex;
    gap: 2rem;
  }
}

.nav-link {
  color: var(--clr-text-light);
  font-weight: 500;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--clr-primary);
  transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-actions .btn {
  display: none;
}

@media (min-width: 768px) {
  .header-actions .btn {
    display: inline-flex;
  }
}

/* Mobile Menu Button */
.mobile-menu-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 30px;
  z-index: 1001;
}

@media (min-width: 992px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--clr-white);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Navigation Panel */
.site-nav.mobile-active {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--clr-dark-deep);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 999;
}

.site-nav.mobile-active .nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.site-nav.mobile-active .nav-link {
  font-size: 1.5rem;
}

/* Hero Section */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--clr-dark);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  animation: hero-zoom 20s infinite alternate ease-in-out;
}

@keyframes hero-zoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.1); }
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.4) 0%, rgba(15, 23, 42, 0.8) 100%);
}

.hero-content {
  position: relative;
  width: 100%;
  z-index: 10;
  color: var(--clr-white);
  padding-top: 80px; /* spacing for header */
}

.hero-title {
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-white);
  margin-bottom: 1.5rem;
}

.hero-title span {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--clr-text-light);
  max-width: 600px;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* General Section Elements */
.lead-text {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--clr-dark);
  margin-bottom: 1.5rem;
}

.body-text {
  color: var(--clr-text-dark);
  margin-bottom: 1.5rem;
}

/* Image Wrapper with Zoom */
.image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
}

.image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.hover-zoom:hover {
  transform: scale(1.08);
}

.shadow-premium {
  box-shadow: var(--shadow-premium);
}

/* Card System */
.glass-card {
  background: var(--grad-glass);
  border: var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 30px 45px rgba(0, 0, 0, 0.15);
  border-color: hsla(0, 0%, 100%, 0.15);
}

.beach-card {
  background: var(--clr-white);
  border: var(--border-light);
  box-shadow: var(--shadow-md);
}

.beach-card .card-title {
  color: var(--clr-dark);
}

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

.card-content {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--clr-primary);
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
}

.card-title {
  font-size: var(--fs-h3);
  margin-bottom: 1.2rem;
}

.card-text {
  margin-bottom: 2rem;
}

.things-card {
  background: var(--clr-dark-light);
  color: var(--clr-white);
  border: var(--border-glass);
}

.things-card .card-title {
  color: var(--clr-white);
}

.card-image-wrap {
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.card-img-side {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.things-card:hover .card-img-side {
  transform: scale(1.05);
}

@media (min-width: 768px) {
  .things-card {
    grid-template-columns: 40% 60%;
  }
  .card-image-wrap {
    height: 100%;
  }
}

/* Numbered Lists */
.numbered-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.numbered-list li {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.list-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-primary);
}

.text-gradient-accent {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.list-text {
  font-size: 1.125rem;
  font-weight: 500;
}

/* Islands Section */
.islands-section {
  background: var(--clr-dark-deep);
  color: var(--clr-white);
  overflow: hidden;
}

.islands-section .image-wrapper {
  aspect-ratio: 4/5;
}

.image-label {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  background: hsla(220, 24%, 12%, 0.75);
  backdrop-filter: blur(8px);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  color: var(--clr-white);
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: 0.5px;
}

/* Samed Nang She Overlap Section */
.samednangshe-section {
  overflow: hidden;
}

.overlapping-images {
  position: relative;
  height: 400px;
  width: 100%;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .overlapping-images {
    height: 500px;
    margin-bottom: 0;
  }
}

.img-large {
  position: absolute;
  top: 0;
  left: 0;
  width: 75%;
  height: 80%;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.img-small {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 50%;
  height: 60%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 6px solid var(--clr-light);
}

.overlapping-images img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.overlapping-images img:hover {
  transform: scale(1.05);
}

.samed-info-block {
  padding-left: 0;
}

@media (min-width: 992px) {
  .samed-info-block {
    padding-left: 3rem;
  }
}

.samed-title {
  font-size: var(--fs-h3);
  margin-bottom: 1.5rem;
}

/* National Parks Section */
.national-parks-section {
  background: var(--clr-white);
}

.park-card {
  background: var(--clr-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-smooth);
  border: var(--border-light);
  display: flex;
  flex-direction: column;
}

.park-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.park-img-wrap {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.park-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.park-card:hover .park-img-wrap img {
  transform: scale(1.06);
}

.park-content {
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.park-title {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--clr-dark);
}

.park-desc {
  color: var(--clr-text-muted);
  font-size: var(--fs-sm);
  margin: 0;
  line-height: 1.7;
}

/* Banner Section */
.banner-section {
  position: relative;
  height: 450px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.banner-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.5);
}

.banner-content {
  position: relative;
  z-index: 10;
  color: var(--clr-white);
  text-align: center;
  padding: 0 1.5rem;
}

.banner-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  color: var(--clr-white);
  margin-bottom: 1rem;
}

.banner-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
}

/* Footer Section */
.site-footer {
  background: var(--clr-dark-deep);
  color: var(--clr-white);
  padding: 6rem 0 2rem;
  border-top: var(--border-glass);
}

.footer-grid {
  gap: 3.5rem;
}

.footer-logo {
  font-size: 1.6rem;
  color: var(--clr-white);
  margin-bottom: 1.2rem;
}

.footer-tagline {
  color: var(--clr-text-light);
  font-size: var(--fs-sm);
  margin-bottom: 2rem;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  color: var(--clr-text-light);
  font-size: var(--fs-sm);
}

.contact-icon {
  flex-shrink: 0;
  color: var(--clr-primary);
  margin-top: 2px;
}

.footer-title {
  font-size: 1.2rem;
  color: var(--clr-white);
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-desc {
  color: var(--clr-text-light);
  font-size: var(--fs-sm);
  margin-bottom: 1.5rem;
}

/* Form Styling */
.footer-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  font-weight: 500;
}

.required {
  color: var(--clr-secondary);
}

.form-input,
.form-textarea {
  background: rgba(255, 255, 255, 0.05);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  color: var(--clr-white);
  font-family: inherit;
  font-size: var(--fs-sm);
  transition: var(--transition-smooth);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--clr-primary);
  box-shadow: 0 0 10px rgba(26, 158, 166, 0.2);
}

.form-textarea {
  resize: vertical;
}

.form-feedback {
  font-size: var(--fs-sm);
  margin-top: 0.5rem;
  display: none;
}

.form-feedback.success {
  display: block;
  color: hsl(145, 80%, 40%);
}

.form-feedback.error {
  display: block;
  color: hsl(0, 80%, 60%);
}

/* Newsletter & Socials */
.social-links-container {
  margin-top: 2.5rem;
}

.social-title {
  display: block;
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.social-links {
  display: flex;
  gap: 1.2rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: var(--clr-white);
  border: var(--border-glass);
}

.social-links a:hover {
  background: var(--clr-primary);
  color: var(--clr-white);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(26, 158, 166, 0.3);
}

/* Footer Bottom */
.footer-bottom {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: var(--border-glass);
  color: var(--clr-text-muted);
  font-size: var(--fs-sm);
}

/* Responsive Grid Overrides for Footer */
@media (min-width: 992px) {
  .footer-grid {
    grid-template-columns: 30% 40% 30%;
  }
}