/* ===== Design tokens ===== */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1.4rem + 4vw, 4.5rem);

  --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;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1080px;
  --content-wide: 1240px;

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
}

/* Light theme — warm, tropical, editorial */
:root,
[data-theme='light'] {
  --color-bg: #faf7f2;
  --color-surface: #ffffff;
  --color-surface-2: #f4efe6;
  --color-surface-offset: #ede6d8;
  --color-border: #e2d9c8;
  --color-divider: #ebe3d3;

  --color-text: #201d17;
  --color-text-muted: #6b6558;
  --color-text-faint: #a89f8c;
  --color-text-inverse: #faf7f2;

  --color-primary: #0d6c73; /* deep teal — Andaman */
  --color-primary-hover: #095057;
  --color-primary-highlight: #cde2e2;

  --color-accent: #c9682e; /* warm terracotta / golden hour */
  --color-accent-highlight: #f2dcc8;

  --shadow-sm: 0 1px 2px rgba(50, 40, 20, 0.06);
  --shadow-md: 0 8px 24px rgba(50, 40, 20, 0.08);
  --shadow-lg: 0 24px 60px rgba(50, 40, 20, 0.14);
}

/* ===== Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img,
picture,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}
button {
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  font: inherit;
}
h1,
h2,
h3 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
p {
  text-wrap: pretty;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
::selection {
  background: rgba(13, 108, 115, 0.2);
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Language-specific typography */
html[lang='th'] {
  --font-body: 'Noto Sans Thai', 'Inter', system-ui, sans-serif;
  --font-display: 'Noto Sans Thai', 'Fraunces', serif;
}
html[lang='zh'] {
  --font-body: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
  --font-display: 'Noto Sans SC', 'Fraunces', serif;
}
html[lang='zh'] h1,
html[lang='zh'] h2,
html[lang='zh'] h3,
html[lang='th'] h1,
html[lang='th'] h2,
html[lang='th'] h3 {
  font-weight: 600;
  letter-spacing: normal;
}

/* ===== Layout helpers ===== */
.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
.eyebrow {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: var(--text-xl);
  max-width: 22ch;
  margin-bottom: var(--space-5);
}
.section-lede {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
}

/* skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  z-index: 100;
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive),
    background var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.site-header.is-scrolled {
  background: rgba(250, 247, 242, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--color-divider);
  box-shadow: var(--shadow-sm);
}
/* Over hero — brand and lang button on dark image */
.site-header:not(.is-scrolled) .brand,
.site-header:not(.is-scrolled) .brand .brand-mark {
  color: #ffffff;
}
.site-header:not(.is-scrolled) .lang-btn {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.site-header:not(.is-scrolled) .lang-btn:hover {
  border-color: rgba(255, 255, 255, 0.7);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}
.brand-mark {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}
.brand-word {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language switcher */
.lang-switcher {
  position: relative;
}
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: border-color var(--transition-interactive),
    background var(--transition-interactive);
}
.lang-btn:hover {
  border-color: var(--color-primary);
}
.lang-btn[aria-expanded='true'] {
  border-color: var(--color-primary);
}
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-2));
  min-width: 180px;
  list-style: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
  z-index: 60;
}
.lang-menu[hidden] {
  display: none;
}
.lang-menu li {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: background var(--transition-interactive);
}
.lang-menu li:hover,
.lang-menu li:focus-visible {
  background: var(--color-surface-2);
  outline: none;
}
.lang-menu li[aria-selected='true'] {
  color: var(--color-primary);
  font-weight: 600;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  padding-block: var(--space-24) var(--space-20);
  overflow: hidden;
  color: var(--color-text-inverse);
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 55%;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
      180deg,
      rgba(20, 15, 10, 0.15) 0%,
      rgba(20, 15, 10, 0.15) 45%,
      rgba(20, 15, 10, 0.7) 100%
    ),
    linear-gradient(90deg, rgba(20, 15, 10, 0.55) 0%, rgba(20, 15, 10, 0) 55%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 100%;
}
.hero .eyebrow {
  color: #f0d9b8;
}
.hero-title {
  font-size: var(--text-3xl);
  max-width: 20ch;
  color: #ffffff;
  margin-bottom: var(--space-5);
}
.hero-lede {
  font-size: var(--text-lg);
  max-width: 44ch;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-10);
}
.hero-steps {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  padding: 0;
}
.hero-steps li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 500;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.35);
  font-size: 0.8rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
}

/* ===== Positioning ===== */
.positioning {
  background: var(--color-bg);
}
.positioning-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
}
.positioning-media img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.benefits-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.benefits-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text);
}
.benefit-ico {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== How it works ===== */
.how {
  background: var(--color-surface-2);
  border-block: 1px solid var(--color-divider);
}
.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}
.how-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.how-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.how-num {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
  font-weight: 500;
}
.how-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.how-card p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 40ch;
}

/* ===== Audience ===== */
.audience {
  background: var(--color-bg);
}
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-4);
}
.audience-card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  transition: border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.audience-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.audience-flag {
  width: 48px;
  height: 34px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--space-5);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.audience-flag svg {
  width: 100%;
  height: 100%;
  display: block;
}
.audience-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.audience-card p {
  color: var(--color-text-muted);
  max-width: 34ch;
}

/* ===== Features ===== */
.features {
  background: var(--color-surface-2);
  border-block: 1px solid var(--color-divider);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}
.feature {
  padding-inline: 0;
}
.feature-ico {
  width: 26px;
  height: 26px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.feature h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.005em;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.feature p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 40ch;
}

/* ===== Closing ===== */
.closing {
  background: var(--color-bg);
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
}
.closing-inner {
  text-align: center;
  max-width: 780px;
  margin-inline: auto;
}
.closing-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-5);
  max-width: 20ch;
  margin-inline: auto;
}
.closing-lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .positioning-grid {
    grid-template-columns: 1fr;
  }
  .positioning-media {
    order: -1;
  }
}

@media (max-width: 640px) {
  .hero {
    min-height: 78vh;
    padding-block: var(--space-10) var(--space-16);
  }
  .hero-lede {
    font-size: var(--text-base);
  }
  .hero-steps {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  .brand-word {
    font-size: 1.1rem;
  }
  .lang-btn {
    padding: var(--space-2) var(--space-3);
  }
  .lang-menu {
    right: 0;
    left: auto;
    min-width: 170px;
  }
  .how-card,
  .audience-card {
    padding: var(--space-6);
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}

@media (min-width: 1200px) {
  .hero-title {
    font-size: clamp(3rem, 5vw, 5rem);
  }
}

/* ===== DISTRIBUTION NETWORK ===== */
.distribution { background: var(--surface); }
.dist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 768px) {
  .dist-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .dist-grid { grid-template-columns: 1fr; }
}
.dist-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.75rem 1.25rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  cursor: pointer;
}
.dist-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(124,58,237,0.12);
  transform: translateY(-3px);
}
.dist-logo {
  height: 40px;
  width: auto;
  max-width: 160px;
}
.dist-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  text-align: center;
}
.dist-region {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===== MOBILE APP ===== */
.mobile-app { background: var(--bg); }
.mobile-app-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 768px) {
  .mobile-app-inner {
    grid-template-columns: 1fr;
  }
  .mobile-app-visual { display: none; }
}
.app-badges {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}
.app-badge {
  display: inline-flex;
  border-radius: 8px;
  overflow: hidden;
  transition: opacity 0.2s, transform 0.2s;
  text-decoration: none;
}
.app-badge:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}
/* Phone mockup */
.phone-mockup {
  width: 140px;
  height: 280px;
  background: #1a1a2e;
  border-radius: 28px;
  padding: 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25), inset 0 0 0 1.5px rgba(255,255,255,0.08);
  position: relative;
}
.phone-mockup::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 5px;
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
  z-index: 2;
}
.phone-screen {
  width: 100%;
  height: 100%;
  background: #0f0f1a;
  border-radius: 20px;
  overflow: hidden;
}
.phone-screen-inner {
  width: 100%;
  height: 100%;
}