/* ทิวทัศน์ไทย — แนวเลย์เอาต์แบบเฉพาะตัว: ฮีโร่เฉียง + บันโตะ + แกลเลอรีคอลัมน์ + แถบวัฒนธรรมเฉียง */

:root {
  --ink: #0f1419;
  --ink-soft: #2c3540;
  --paper: #f6f1e8;
  --paper-deep: #ebe3d6;
  --accent: #c45c26;
  --accent-dark: #8a3d18;
  --teal: #1a5c5c;
  --gold: #c9a227;
  --radius-lg: 20px;
  --radius-sm: 10px;
  --shadow: 0 18px 40px rgba(15, 20, 25, 0.12);
  --font: "Segoe UI", "Noto Sans Thai", "Sarabun", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: clamp(0.95rem, 0.9rem + 0.35vw, 1.05rem);
}

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

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  z-index: 1000;
  border-radius: var(--radius-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* —— Header: แถบบาง + เส้นโค้งเล็กน้อย —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(246, 241, 232, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(26, 92, 92, 0.12);
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--gold), var(--accent));
  box-shadow: var(--shadow);
}

.brand-title {
  margin: 0;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand-sub {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.site-nav {
  display: none;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--gold);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  border: none;
  background: var(--paper-deep);
  border-radius: 12px;
  cursor: pointer;
  padding: 0 10px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.nav-panel {
  position: fixed;
  inset: 0;
  top: 73px;
  background: rgba(15, 20, 25, 0.45);
  z-index: 40;
  padding: 1rem;
}

.nav-panel[hidden] {
  display: none !important;
}

.nav-panel nav {
  background: var(--paper);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--shadow);
}

.nav-panel a {
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink);
}

.nav-panel a:hover {
  background: var(--paper-deep);
}

@media (min-width: 880px) {
  .site-nav {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  .nav-panel {
    display: none !important;
  }
}

/* —— Hero: พื้นหลัง + เส้นตัดเฉียง —— */
.hero {
  position: relative;
  min-height: min(88vh, 820px);
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: stretch;
  }
}

.hero-visual {
  min-height: 42vh;
  background-color: var(--teal);
  background-size: cover;
  background-position: center;
  transition: background-image 0.6s ease;
}

@media (min-width: 900px) {
  .hero-visual {
    min-height: auto;
    clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
  }
}

.hero-slant {
  display: none;
}

.hero-inner {
  position: relative;
  padding: clamp(2rem, 6vw, 4rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
  background: linear-gradient(165deg, var(--paper) 0%, var(--paper-deep) 100%);
}

@media (min-width: 900px) {
  .hero-inner {
    margin-left: -6%;
    padding-left: clamp(2.5rem, 8vw, 5rem);
  }
}

.hero-kicker {
  margin: 0;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-dark);
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 1.2rem + 2.5vw, 2.75rem);
  line-height: 1.15;
  max-width: 18ch;
}

.hero-lead {
  margin: 0;
  max-width: 42ch;
  color: var(--ink-soft);
}

.btn-primary {
  align-self: flex-start;
  margin-top: 0.5rem;
  padding: 0.85rem 1.6rem;
  background: var(--teal);
  color: #fff;
  font-weight: 700;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
}

/* —— Bento —— */
.regions {
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 4vw, 2.5rem);
}

.regions-intro {
  max-width: 640px;
  margin-bottom: 2rem;
}

.regions-intro h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
}

.regions-intro p {
  margin: 0;
  color: var(--ink-soft);
}

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

@media (min-width: 640px) {
  .bento-grid {
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: minmax(140px, auto);
  }

  .bento-card:nth-child(1) {
    grid-column: span 4;
    grid-row: span 2;
  }

  .bento-card:nth-child(2) {
    grid-column: span 2;
  }

  .bento-card:nth-child(3) {
    grid-column: span 2;
  }

  .bento-card:nth-child(4) {
    grid-column: span 3;
  }

  .bento-card:nth-child(5) {
    grid-column: span 3;
  }

  .bento-card:nth-child(6) {
    grid-column: span 6;
    min-height: 180px;
  }
}

.bento-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 160px;
  background: var(--paper-deep);
  box-shadow: var(--shadow);
}

.bento-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 160px;
}

.bento-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1rem 1.1rem;
  background: linear-gradient(transparent, rgba(15, 20, 25, 0.82));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

/* —— Gallery masonry —— */
.gallery-strip {
  padding: clamp(2rem, 5vw, 4rem) clamp(1rem, 4vw, 2.5rem);
  background: var(--paper-deep);
}

.gallery-head {
  max-width: 720px;
  margin-bottom: 1.75rem;
}

.gallery-head h2 {
  margin: 0 0 0.5rem;
}

.gallery-head p {
  margin: 0;
  color: var(--ink-soft);
}

.gallery-masonry {
  column-count: 1;
  column-gap: 1rem;
}

@media (min-width: 560px) {
  .gallery-masonry {
    column-count: 2;
  }
}

@media (min-width: 1024px) {
  .gallery-masonry {
    column-count: 3;
  }
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 1rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.gallery-item img {
  width: 100%;
  vertical-align: middle;
}

.gallery-item p {
  margin: 0;
  padding: 0.65rem 1rem 1rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.gallery-credit {
  margin: 1.25rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* —— Culture: แถบเฉียง —— */
.culture-diagonal {
  display: grid;
  gap: 0;
}

@media (min-width: 880px) {
  .culture-diagonal {
    grid-template-columns: 1fr 1fr;
    min-height: 420px;
  }
}

.culture-content {
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--ink);
  color: #e8e3db;
  transform: skewY(0deg);
}

@media (min-width: 880px) {
  .culture-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    clip-path: polygon(0 0, 100% 0, 94% 100%, 0 100%);
    padding-right: 10%;
  }
}

.culture-content h2 {
  margin: 0 0 1rem;
  color: #fff;
}

.culture-content p {
  margin: 0 0 1rem;
  color: rgba(232, 227, 219, 0.88);
}

.culture-list {
  margin: 0;
  padding-left: 1.2rem;
  color: rgba(232, 227, 219, 0.9);
}

.culture-list li {
  margin-bottom: 0.5rem;
}

.culture-figure {
  margin: 0;
  min-height: 280px;
  background: var(--teal);
  background-size: cover;
  background-position: center;
}

@media (min-width: 880px) {
  .culture-figure {
    min-height: auto;
    margin-left: -8%;
  }
}

/* —— About —— */
.about {
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1rem, 4vw, 2.5rem);
}

.about h2 {
  margin: 0 0 1rem;
}

.about-grid {
  display: grid;
  gap: 1rem;
  max-width: 720px;
}

.about-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.about-contact {
  font-style: normal;
  margin-top: 0.5rem;
  padding: 1rem 1.25rem;
  background: #fff;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--gold);
}

.about-contact a {
  font-weight: 700;
}

.about-contact-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--ink-soft);
}

/* —— Footer —— */
.site-footer {
  padding: 2rem clamp(1rem, 4vw, 2.5rem) 2.5rem;
  background: var(--paper-deep);
  border-top: 1px solid rgba(26, 92, 92, 0.15);
}

.site-footer p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.footer-note {
  font-size: 0.78rem;
  max-width: 720px;
  line-height: 1.5;
}