:root {
  --ku-green: #006664;
  --ku-green-deep: #014846;
  --blue-deep: #14335a;
  --ink: #1c3134;
  --muted: #617476;
  --shadow: 0 26px 70px rgba(0, 68, 67, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Sarabun", "Noto Sans Thai", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(239, 200, 74, 0.16), transparent 24rem),
    linear-gradient(180deg, #fffdf9 0%, #f5efe4 100%);
}

a { color: inherit; text-decoration: none; }

.page {
  width: min(1220px, calc(100vw - 28px));
  margin: 20px auto 36px;
}

.frame {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 32px;
  background: rgba(255, 253, 248, 0.84);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.inner { padding: 24px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 2px 24px;
}

.site-label {
  color: var(--ku-green);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.site-label span {
  display: block;
  line-height: 1.25;
}

.site-label span:first-child {
  font-size: 1.18em;
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  transition: 160ms ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  background: rgba(0, 102, 100, 0.08);
  color: var(--ku-green-deep);
}

.hero {
  padding: 28px 2px 10px;
}

.hero-kicker {
  color: var(--ku-green);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  font-weight: 600;
}

h1 {
  margin: 16px 0 0;
  color: var(--blue-deep);
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
  font-weight: 700;
}

.hero-subtitle {
  max-width: 56rem;
  margin-top: 22px;
  color: #213032;
  font-size: clamp(1.06rem, 1.45vw, 1.18rem);
  line-height: 1.85;
}

.content-section {
  margin-top: 28px;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 6px 0 0;
  color: var(--blue-deep);
  font-size: clamp(1.6rem, 2.6vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 10px 0 0;
  color: #314143;
  line-height: 1.75;
}

.section-kicker {
  color: var(--ku-green);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search-panel {
  margin-top: 28px;
}

.search-card {
  position: relative;
  overflow: hidden;
  padding: 22px;
  border: 1px solid rgba(0, 102, 100, 0.12);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(228, 240, 235, 0.55));
  box-shadow: 0 18px 34px rgba(0, 68, 67, 0.06);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.search-card::before {
  content: "";
  position: absolute;
  inset: -40% auto -40% -42%;
  width: 34%;
  transform: skewX(-18deg);
  background: linear-gradient(90deg, transparent, rgba(239, 200, 74, 0.34), rgba(255, 255, 255, 0.7), transparent);
  opacity: 0;
  pointer-events: none;
}

.search-card:hover,
.search-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(0, 102, 100, 0.28);
  background: linear-gradient(135deg, rgba(255, 252, 236, 0.98), rgba(225, 246, 244, 0.88));
  box-shadow: 0 24px 54px rgba(0, 68, 67, 0.14);
}

.search-card:hover::before,
.search-card:focus-within::before {
  animation: card-splash 760ms ease-out;
}

.browse-entry {
  margin-top: 16px;
}

.browse-entry__card {
  position: relative;
  overflow: hidden;
  display: block;
  padding: 18px 22px;
  border: 1px solid rgba(20, 51, 90, 0.1);
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(20, 51, 90, 0.06), rgba(0, 102, 100, 0.08));
  box-shadow: 0 16px 30px rgba(0, 68, 67, 0.05);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
}

.browse-entry__card::before {
  content: "";
  position: absolute;
  inset: -38% auto -38% -40%;
  width: 32%;
  transform: skewX(-18deg);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.74), rgba(239, 200, 74, 0.42), transparent);
  opacity: 0;
  pointer-events: none;
}

.browse-entry__card::after {
  content: "→";
  position: absolute;
  right: 22px;
  top: 50%;
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 999px;
  background: var(--blue-deep);
  color: #ffffff;
  font-weight: 700;
  transform: translateY(-50%) translateX(8px);
  opacity: 0;
  transition: transform 180ms ease, opacity 180ms ease;
}

.browse-entry__card:hover {
  transform: translateY(-3px);
  border-color: rgba(20, 51, 90, 0.28);
  background: linear-gradient(135deg, rgba(255, 248, 219, 0.92), rgba(218, 245, 242, 0.9));
  box-shadow: 0 24px 54px rgba(20, 51, 90, 0.14);
}

.browse-entry__card:hover::before {
  animation: card-splash 760ms ease-out;
}

.browse-entry__card:hover::after {
  transform: translateY(-50%) translateX(0);
  opacity: 1;
}

.browse-entry__kicker {
  color: var(--ku-green);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.browse-entry__title {
  margin-top: 6px;
  color: var(--blue-deep);
  font-size: 1.1rem;
  font-weight: 700;
}

.browse-entry__body {
  margin-top: 6px;
  padding-right: 56px;
  color: #3f5558;
  line-height: 1.7;
}

@keyframes card-splash {
  0% {
    left: -42%;
    opacity: 0;
  }

  18% {
    opacity: 1;
  }

  100% {
    left: 116%;
    opacity: 0;
  }
}

.search-label {
  display: block;
  margin-bottom: 6px;
  color: var(--blue-deep);
  font-weight: 700;
}

.search-helper {
  margin-bottom: 14px;
  color: #486062;
  line-height: 1.7;
}

.search-shell {
  position: relative;
}

.search-input {
  width: 100%;
  padding: 16px 18px;
  border: 1px solid rgba(0, 102, 100, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font: inherit;
  box-shadow: 0 12px 28px rgba(0, 68, 67, 0.05);
}

.search-input:focus {
  outline: 2px solid rgba(0, 102, 100, 0.18);
  border-color: rgba(0, 102, 100, 0.26);
}

.search-suggestions {
  position: absolute;
  z-index: 5;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid rgba(0, 102, 100, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 22px 42px rgba(0, 68, 67, 0.12);
  max-height: min(26rem, 60vh);
  overflow-y: auto;
}

.search-suggestions[hidden] {
  display: none;
}

.search-suggestion {
  display: block;
  padding: 12px 14px;
  border-radius: 14px;
  transition: 160ms ease;
}

.search-suggestion:hover,
.search-suggestion.is-active {
  background: rgba(0, 102, 100, 0.08);
}

.search-suggestion__meta {
  color: var(--ku-green);
  font-size: 0.84rem;
  font-weight: 600;
}

.search-suggestion__title {
  margin-top: 4px;
  color: var(--blue-deep);
  font-weight: 700;
  line-height: 1.45;
}

.feature-card {
  display: grid;
  grid-template-columns: minmax(240px, 520px) minmax(0, 1fr);
  gap: 24px;
  padding: 22px;
  border: 1px solid rgba(0, 102, 100, 0.12);
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(221, 239, 232, 0.52));
  box-shadow: 0 22px 46px rgba(0, 68, 67, 0.08);
  align-items: start;
}

.feature-card__media {
  min-width: 0;
}

.feature-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: 24px;
  border: 1px solid rgba(0, 102, 100, 0.08);
  background: #fff;
}

.feature-card__body h3 {
  margin: 10px 0 0;
  color: var(--blue-deep);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.feature-card__body p {
  margin: 14px 0 0;
  color: #2d393b;
  line-height: 1.82;
}

.latest-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.latest-item {
  min-width: 0;
}

.archive-card {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 20px;
  border: 1px solid rgba(0, 102, 100, 0.1);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.56);
  transition: 160ms ease;
}

.archive-card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 102, 100, 0.18);
  box-shadow: 0 18px 38px rgba(0, 68, 67, 0.08);
}

.archive-meta {
  color: var(--ku-green);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  font-weight: 600;
}

.archive-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: 20px;
  border: 1px solid rgba(0, 102, 100, 0.08);
  background: #ffffff;
}

.archive-body {
  min-width: 0;
}

.archive-card h2 {
  margin: 10px 0 0;
  color: var(--blue-deep);
  font-size: clamp(1.45rem, 2.6vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.archive-card p {
  margin: 14px 0 0;
  max-width: 54rem;
  color: #2d393b;
  line-height: 1.82;
}

.archive-card--compact {
  grid-template-columns: 1fr;
  gap: 14px;
  height: 100%;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(240, 246, 243, 0.78));
  box-shadow: 0 14px 28px rgba(0, 68, 67, 0.05);
}

.archive-card--compact .archive-thumb {
  aspect-ratio: 16 / 10;
}

.archive-card--compact h3 {
  margin: 10px 0 0;
  color: var(--blue-deep);
  font-size: 1.22rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.topic-card {
  padding: 20px;
  border: 1px solid rgba(0, 102, 100, 0.14);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(235, 242, 238, 0.72));
  box-shadow: 0 16px 32px rgba(0, 68, 67, 0.06);
}

.topic-card__eyebrow {
  color: var(--ku-green);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.topic-card h3 {
  margin: 10px 0 0;
  color: var(--blue-deep);
  font-size: 1.32rem;
  line-height: 1.2;
}

.topic-list {
  margin: 16px 0 0;
  padding-left: 1.2rem;
  color: #2d393b;
}

.topic-list li + li {
  margin-top: 10px;
}

.topic-list a {
  color: inherit;
  line-height: 1.65;
}

.topic-list a:hover {
  color: var(--ku-green-deep);
}

.topic-toggle {
  margin-top: 16px;
  padding: 10px 14px;
  border: 1px solid rgba(0, 102, 100, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ku-green-deep);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.topic-card--other .topic-summary-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.topic-card--other .topic-summary-list li {
  padding: 10px 0;
  border-top: 1px solid rgba(0, 102, 100, 0.08);
}

.topic-card--other .topic-summary-list li:first-child {
  border-top: none;
  padding-top: 0;
}

.topic-card--other .topic-summary-list strong {
  color: var(--ku-green-deep);
  font-size: 0.92rem;
}

.topic-subgroup summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

.topic-subgroup summary::-webkit-details-marker {
  display: none;
}

.topic-subgroup-list {
  margin: 12px 0 0;
  padding-left: 1.2rem;
}

.topic-subgroup-list li + li {
  margin-top: 8px;
}

.topic-subgroup-list a {
  color: inherit;
  line-height: 1.6;
}

.topic-subgroup-list a:hover {
  color: var(--ku-green-deep);
}

.section-actions {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.action-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.expand-button {
  padding: 12px 18px;
  border: 1px solid rgba(0, 102, 100, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ku-green-deep);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 22px rgba(0, 68, 67, 0.05);
  transition: 160ms ease;
}

.expand-button:hover {
  transform: translateY(-1px);
  background: rgba(0, 102, 100, 0.08);
}

.expand-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  background: rgba(255, 255, 255, 0.7);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(0, 102, 100, 0.08);
  color: var(--ku-green-deep);
  font-size: 0.88rem;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 28px 2px 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .page {
    width: min(1220px, calc(100vw - 16px));
    margin-top: 8px;
  }

  .frame { border-radius: 22px; }
  .inner { padding: 16px; }

  .archive-card {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .latest-grid,
  .topics-grid {
    grid-template-columns: 1fr;
  }

  .topbar,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .browse-entry__card::after {
    display: none;
  }

  .browse-entry__body {
    padding-right: 0;
  }

  h1 { font-size: clamp(2.4rem, 12vw, 3.8rem); }
}