/* =========================================================
   Design Tokens — สีอ้างอิงจาก Figma Hero
   ========================================================= */
:root {
  /* Palette */
  --color-bg:        #f4ecdf;   /* ครีมอบอุ่น */
  --color-surface:   #ffffff;
  --color-ink:       #1d2960;   /* navy เข้ม สำหรับ title */
  --color-ink-soft:  #3a3f70;
  --color-muted:     #6b6f8c;
  --color-accent:    #6f5fb0;   /* ม่วง CTA */
  --color-accent-2:  #8678c4;   /* ม่วงอ่อน gradient */
  --color-line:      #d9cfbe;

  /* Typography */
  --font-display: "Noto Serif Thai", "Inter", "Noto Sans SC", serif;
  --font-body:    "Sarabun", "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;

  /* Spacing scale */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;

  /* Layout */
  --container: 1200px;
  --radius-pill: 999px;
  --radius: 16px;

  /* Shadows */
  --shadow-cta:   0 12px 28px -10px rgba(111, 95, 176, .55);
  --shadow-ghost: 0 6px 18px -8px rgba(29, 41, 96, .25);
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

/* =========================================================
   Navigation
   ========================================================= */
.nav {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-4) var(--space-5);
  max-width: var(--container);
  margin-inline: auto;
}

/* Hamburger toggle — desktop hidden */
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
  margin-left: auto;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
  transform-origin: center;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-ink);
  letter-spacing: .02em;
}
.nav__menu {
  display: flex;
  gap: var(--space-5);
  flex: 1;
  justify-content: center;
}
.nav__menu a {
  position: relative;
  color: var(--color-muted);
  font-weight: 500;
  padding: var(--space-2) 0;
  transition: color .2s;
}
.nav__menu a:hover { color: var(--color-ink); }
.nav__menu a.is-active {
  color: var(--color-accent);
  font-weight: 600;
}
.nav__menu a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* Language flags */
.nav__lang {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}
.flag {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,.12);
  overflow: hidden;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s, box-shadow .15s;
}
.flag img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.flag:hover { transform: scale(1.12); }
.flag.is-active {
  box-shadow: 0 0 0 2px var(--color-accent), 0 0 0 4px #fff;
  transform: scale(1.08);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    /* scrim เพื่อให้ตัวอักษรอ่านง่าย */
    linear-gradient(180deg, rgba(244,236,223,.72) 0%, rgba(244,236,223,.55) 45%, rgba(244,236,223,.82) 100%),
    url("../assets/images/hero-bg.png") center/cover no-repeat,
    /* fallback gradient ระหว่างที่ยังไม่ใส่ภาพ */
    radial-gradient(900px 600px at 50% 30%, #efe1ff 0%, #f8e9d8 40%, #f4ecdf 80%);
}

.hero__inner {
  max-width: 880px;
  margin-inline: auto;
  padding: var(--space-7) var(--space-4) var(--space-6);
  text-align: center;
}
.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
  font-weight: 500;
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  line-height: 1.05;
  margin: 0 0 var(--space-4);
  color: var(--color-ink);
  letter-spacing: .01em;
  text-shadow: 0 2px 24px rgba(255,255,255,.6);
}
.hero__subtitle {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--color-ink-soft);
  margin: 0 auto var(--space-6);
  max-width: 720px;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: .95rem 2.25rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: transform .15s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
  box-shadow: var(--shadow-cta);
}
.btn--primary:hover { box-shadow: 0 16px 32px -10px rgba(111, 95, 176, .65); }

.btn--ghost {
  color: var(--color-ink);
  background: rgba(255,255,255,.55);
  border: 1.5px solid rgba(111, 95, 176, .35);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-ghost);
}
.btn--ghost:hover { background: rgba(255,255,255,.8); }
.btn__icon {
  display: inline-grid;
  place-items: center;
  color: var(--color-accent);
}

/* =========================================================
   Sections
   ========================================================= */
.section {
  padding: var(--space-7) var(--space-4);
  max-width: var(--container);
  margin-inline: auto;
}

/* ---------- Video section ---------- */
.video-section {
  position: relative;
  padding: var(--space-6) var(--space-4) var(--space-7);
  /* แบ็คกราวด์ต่อจาก hero — pastel เมฆ */
  background:
    linear-gradient(180deg, rgba(244,236,223,.78) 0%, var(--color-bg) 90%),
    url("../assets/images/hero-bg.png") center/cover no-repeat;
}
.video-frame {
  max-width: 1040px;
  margin-inline: auto;
  aspect-ratio: 16 / 9;
  border: 2px solid #3a4ea0;
  border-radius: var(--radius);
  background: #d4d4d4;
  overflow: hidden;
  box-shadow: 0 30px 60px -25px rgba(29, 41, 96, .25);
}
.video-placeholder {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  color: var(--color-ink);
}
.video-frame video,
.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* ---------- About section ---------- */
.about {
  display: grid;
  gap: var(--space-6);
  justify-items: center;
  text-align: left;
}
.about__figure {
  margin: 0;
  width: min(440px, 80%);
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 50px -20px rgba(168, 132, 59, .45);
  background: linear-gradient(135deg, #d4b66a, #b8923f);
}
.about__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about__content {
  max-width: 820px;
}
.about__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
  font-weight: 700;
}
.about__content p {
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
  font-size: 1.05rem;
}

/* =========================================================
   Quote bar
   ========================================================= */
.quote-bar {
  max-width: 720px;
  margin: var(--space-6) auto var(--space-4);
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-5);
  background: #efe8d6;
  border-left: 5px solid #3a4ea0;
  border-radius: 10px;
  font-style: italic;
  color: var(--color-ink-soft);
}
.quote-bar p { margin: 0; }

/* =========================================================
   Contribute section
   ========================================================= */
.contribute {
  position: relative;
  padding: var(--space-6) var(--space-4) var(--space-7);
  text-align: center;
  background:
    linear-gradient(180deg, rgba(248,243,232,.88) 0%, rgba(248,243,232,.92) 100%),
    url("../assets/images/contribute-bg.png") center/cover no-repeat;
}
.contribute__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2vw, 1.55rem);
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0 auto var(--space-6);
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-inline: var(--space-3);
  word-break: break-word;
  overflow-wrap: break-word;
}
.contribute__title span {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
  display: inline-block;
}

@media (max-width: 540px) {
  .contribute__title {
    font-size: 1rem;
    line-height: 1.6;
    gap: var(--space-2);
  }
  .contribute__title span {
    text-decoration-thickness: 1.5px;
    text-underline-offset: 4px;
  }
}

.message-box {
  max-width: 880px;
  margin-inline: auto;
  min-height: 260px;
  background: rgba(255, 255, 255, .92);
  border-radius: 20px;
  box-shadow: 0 20px 50px -20px rgba(29, 41, 96, .25);
  display: grid;
  place-items: center;
  padding: var(--space-5);
}
.message-box .field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  width: 100%;
  max-width: 640px;
  margin: 0 auto var(--space-3);
  text-align: left;
  font-weight: 500;
  color: var(--color-ink);
}
.message-box .field input,
.message-box .field textarea {
  font: inherit;
  padding: .7rem .9rem;
  border: 1.5px solid var(--color-line);
  border-radius: 10px;
  background: #fff;
  color: var(--color-ink);
  resize: vertical;
}
.message-box .field input:focus,
.message-box .field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: transparent;
}
.message-box__placeholder {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-ink);
}

/* =========================================================
   Buddhism section (glassmorphism)
   ========================================================= */
.buddhism {
  position: relative;
  overflow: hidden;
  padding: var(--space-7) var(--space-4);
  isolation: isolate;
  text-align: center;
}
.buddhism__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(255,250,240,.55) 0%, rgba(255,250,240,.40) 50%, rgba(255,250,240,.55) 100%),
    url("../assets/images/buddhism-bg.png") center/cover no-repeat,
    linear-gradient(180deg, #cfe4f5 0%, #f2c98c 60%, #b7d290 100%);
  filter: saturate(.7) brightness(1.05);
}
.buddhism__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #1a1a1a;
  margin: 0 auto var(--space-5);
  text-shadow: 0 2px 14px rgba(255,255,255,.6);
}
.buddhism__panel {
  max-width: 960px;
  margin-inline: auto;
  padding: var(--space-5) var(--space-6);
  background: rgba(255, 255, 255, .55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, .6);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,.25);
  text-align: left;
}
.buddhism__panel p {
  color: #2a2a2a;
  margin: 0 0 var(--space-3);
  font-size: 1.05rem;
  text-align: center;
}
.buddhism__panel p:last-child { margin: 0; }

/* =========================================================
   Legacy (4 cards)
   ========================================================= */
.legacy { background: var(--color-bg); }
.legacy__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  text-align: center;
  color: var(--color-ink);
  margin: 0 0 var(--space-6);
}
.legacy__quote { color: var(--color-ink); }

.legacy__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.card {
  position: relative;
  padding: var(--space-5);
  border-radius: 18px;
  display: grid;
  gap: var(--space-3);
  min-height: 320px;
}
.card--white { background: #fff; box-shadow: 0 12px 30px -18px rgba(29,41,96,.18); }
.card--cream { background: #ece4d3; }

.card__number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: #a8a08a;
  letter-spacing: .05em;
}
.card__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
  line-height: 1.4;
}
.card__body p {
  color: var(--color-ink-soft);
  font-size: .95rem;
  line-height: 1.7;
  margin: 0;
}

.card__media {
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(135deg, #d4b66a, #8a7340);
  aspect-ratio: 4 / 3;
  max-width: 220px;
}
.card__media--small { max-width: 180px; aspect-ratio: 1/1; }
.card__media img { width: 100%; height: 100%; object-fit: cover; }

/* Layout variants */
.card--image-left {
  grid-template-columns: 220px 1fr;
  grid-template-areas:
    "media number"
    "media body";
  align-items: start;
}
.card--image-left .card__media  { grid-area: media; align-self: center; }
.card--image-left .card__number { grid-area: number; }
.card--image-left .card__body   { grid-area: body; }

.card--image-bottom {
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "number ."
    "body media";
}
.card--image-bottom .card__number { grid-area: number; }
.card--image-bottom .card__body   { grid-area: body; }
.card--image-bottom .card__media  { grid-area: media; align-self: end; justify-self: end; }

.card--icon-corner .card__icon {
  position: absolute;
  right: var(--space-4);
  bottom: var(--space-4);
  width: 56px;
  height: 56px;
  color: #c9c2ad;
}

/* =========================================================
   Map section
   ========================================================= */
.map {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.map__figure {
  margin: 0;
  background: #fff;
  padding: var(--space-3);
  border-radius: var(--radius);
  box-shadow: 0 16px 40px -20px rgba(29,41,96,.2);
}
.map__figure img { width: 100%; border-radius: 8px; }
.map__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}
.map__content p {
  color: var(--color-ink-soft);
  font-size: 1.05rem;
  margin: 0 0 var(--space-5);
}
.map__facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.map__facts li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
}
.map__facts svg {
  width: 28px; height: 28px;
  color: var(--color-accent);
  flex-shrink: 0;
}
.map__facts strong { color: var(--color-ink); font-weight: 600; margin-right: 4px; }

/* =========================================================
   Footer
   ========================================================= */
.footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-4);
  text-align: center;
  color: var(--color-muted);
  font-size: .9rem;
}

/* =========================================================
   Responsive
   ========================================================= */

/* ---------- Tablet & smaller ---------- */
@media (max-width: 900px) {
  .nav {
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
  }
  .nav__brand { margin-right: auto; }
  .nav__toggle { display: flex; order: 3; margin-left: 0; }
  .nav__lang { order: 2; }
  .nav__lang { gap: 6px; }
  .nav__lang .flag { width: 24px; height: 24px; }

  /* Mobile menu drawer */
  .nav__menu {
    order: 4;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .25s;
    padding: 0;
    background: rgba(255, 250, 240, .98);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    margin-top: 0;
  }
  body.nav-open .nav__menu {
    max-height: 400px;
    padding: var(--space-3) 0;
    margin-top: var(--space-2);
    box-shadow: 0 16px 40px -16px rgba(29,41,96,.25);
  }
  .nav__menu li { width: 100%; }
  .nav__menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    text-align: center;
    font-size: 1.05rem;
  }
  .nav__menu a.is-active::after { display: none; }
  .nav__menu a.is-active {
    background: rgba(111, 95, 176, .1);
    border-radius: 8px;
    margin: 0 var(--space-3);
  }

  /* Lock body scroll when menu open */
  body.nav-open { overflow: hidden; }

  /* Section layouts */
  .legacy__grid { grid-template-columns: 1fr; }
  .map          { grid-template-columns: 1fr; gap: var(--space-4); }
  .map__figure  { max-width: 480px; margin-inline: auto; }
  .section      { padding: var(--space-6) var(--space-3); }
}

/* ---------- Small tablet ---------- */
@media (max-width: 720px) {
  .hero { min-height: 80vh; }
  .hero__inner { padding: var(--space-5) var(--space-3); }
  .video-section { padding: var(--space-5) var(--space-3); }
  .contribute   { padding: var(--space-5) var(--space-3); }
  .buddhism     { padding: var(--space-6) var(--space-3); }
  .buddhism__panel { padding: var(--space-4); }

  .card--image-left {
    grid-template-columns: 1fr;
    grid-template-areas: "number" "media" "body";
  }
  .card--image-left .card__media { max-width: 100%; aspect-ratio: 16/9; }
  .card--image-bottom .card__media { max-width: 140px; }

  .message-box { min-height: 220px; padding: var(--space-4); }
}

/* ---------- Phone ---------- */
@media (max-width: 540px) {
  .nav { padding: var(--space-3); }
  .nav__brand { font-size: 1.15rem; }

  .hero__cta { width: 100%; }
  .btn { padding: .85rem 1.5rem; font-size: .95rem; width: 100%; max-width: 320px; justify-content: center; }

  .about__figure { width: min(320px, 90%); }
  .quote-bar { margin-inline: var(--space-3); font-size: .95rem; }

  .legacy__title { font-size: 1.5rem; }
  .buddhism__title { font-size: 1.75rem; }
  .map__title { font-size: 1.5rem; }

  .card { padding: var(--space-4); min-height: auto; }
  .card--image-bottom {
    grid-template-columns: 1fr;
    grid-template-areas: "number" "body" "media";
  }
  .card--image-bottom .card__media { justify-self: center; }
}

/* ---------- Tiny phone ---------- */
@media (max-width: 380px) {
  .nav__lang { gap: 5px; }
  .nav__lang .flag { width: 22px; height: 22px; }
  .hero__title { font-size: 2.25rem; }
}