:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --panel: #ffffff;
  --panel-strong: #edf4f2;
  --ink: #172124;
  --muted: #536267;
  --line: #d8e2e0;
  --accent: #15616d;
  --accent-2: #9a5b22;
  --shadow: 0 24px 80px rgba(28, 44, 48, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101516;
  --panel: #172022;
  --panel-strong: #1f2b2d;
  --ink: #edf4f2;
  --muted: #b7c4c2;
  --line: #314245;
  --accent: #68c7cf;
  --accent-2: #e3ad72;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Segoe UI", "Noto Sans Thai", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

a {
  color: inherit;
}

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

.skip-link {
  background: var(--ink);
  color: var(--panel);
  left: 16px;
  padding: 8px 12px;
  position: absolute;
  top: -48px;
  z-index: 100;
}

.skip-link:focus {
  top: 16px;
}

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

.site-header {
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1120px;
  padding: 14px 22px;
}

.brand {
  font-weight: 850;
  letter-spacing: 0;
  text-decoration: none;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-links a,
.control {
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  padding: 7px 10px;
  text-decoration: none;
}

.control {
  background: var(--panel);
  cursor: pointer;
}

.control.is-active,
.control:hover,
.nav-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.page {
  margin: 0 auto;
  max-width: 1120px;
  padding: 34px 22px 56px;
}

.hero {
  align-items: center;
  display: grid;
  gap: 38px;
  grid-template-columns: minmax(0, 1.05fr) minmax(270px, 0.55fr);
  min-height: calc(100vh - 150px);
  padding: 32px 0 50px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 850;
  margin: 0 0 10px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 4.8rem);
  line-height: 1.03;
  margin: 0 0 18px;
}

.lead {
  color: var(--muted);
  font-size: clamp(1.04rem, 2vw, 1.28rem);
  max-width: 720px;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.button {
  align-items: center;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 7px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 800;
  min-height: 42px;
  padding: 9px 14px;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.markdown-action {
  display: inline-flex;
  position: relative;
}

.markdown-copy,
.markdown-menu summary {
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 800;
  min-height: 42px;
}

.markdown-copy {
  border-radius: 7px 0 0 7px;
  gap: 8px;
  padding: 9px 12px;
}

.markdown-copy:hover,
.markdown-copy:focus-visible,
.markdown-menu summary:hover,
.markdown-menu summary:focus-visible,
.markdown-menu[open] summary {
  border-color: var(--accent);
  color: var(--accent);
}

.markdown-copy.is-copied {
  color: var(--accent);
}

.markdown-copy.is-error {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.markdown-copy svg,
.markdown-menu summary svg {
  fill: none;
  height: 18px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  width: 18px;
}

.markdown-menu {
  position: relative;
}

.markdown-menu summary {
  border-left: 0;
  border-radius: 0 7px 7px 0;
  justify-content: center;
  list-style: none;
  padding: 9px 10px;
}

.markdown-menu summary::-webkit-details-marker {
  display: none;
}

.markdown-menu-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-width: 230px;
  padding: 6px;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 10;
}

.markdown-menu-panel a {
  border-radius: 6px;
  display: block;
  padding: 9px 10px;
  text-decoration: none;
}

.markdown-menu-panel a:hover,
.markdown-menu-panel a:focus-visible {
  background: var(--panel-strong);
}

.markdown-menu-panel strong,
.markdown-menu-panel span {
  display: block;
}

.markdown-menu-panel span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 400;
  margin-top: 2px;
}

.profile-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  justify-self: end;
  max-width: 300px;
  padding: 14px;
}

.profile-card img {
  border-radius: 7px;
  aspect-ratio: 633 / 916;
  object-fit: cover;
  width: 100%;
}

.theme-profile-dark {
  display: none;
}

:root[data-theme="dark"] .theme-profile-light {
  display: none;
}

:root[data-theme="dark"] .theme-profile-dark {
  display: block;
}

.profile-card dl {
  display: grid;
  gap: 8px;
  grid-template-columns: auto minmax(0, 1fr);
  margin: 14px 0 0;
}

.profile-card dt {
  color: var(--muted);
  font-weight: 800;
}

.profile-card dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.section {
  border-top: 1px solid var(--line);
  padding: 46px 0;
}

.section-head {
  align-items: end;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  margin-bottom: 22px;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  line-height: 1.12;
  margin: 0;
}

.section-head p {
  color: var(--muted);
  margin: 0;
  max-width: 560px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.pill-list li {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 7px 10px;
}

.timeline {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.timeline h3 {
  font-size: 1.15rem;
  margin: 0 0 4px;
}

.timeline .meta {
  color: var(--accent-2);
  font-weight: 800;
  margin: 0 0 12px;
}

.timeline ul {
  margin: 0;
  padding-left: 20px;
}

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

.project-card,
.download-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.project-card img {
  aspect-ratio: 16 / 10;
  background: var(--panel-strong);
  object-fit: cover;
  width: 100%;
}

.card-body {
  padding: 16px;
}

.card-body h3 {
  font-size: 1.02rem;
  line-height: 1.25;
  margin: 0 0 8px;
}

.card-body p {
  color: var(--muted);
  margin: 0;
}

.thesis {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 20px;
}

.download-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.download-card {
  padding: 15px;
  text-decoration: none;
}

.download-card strong {
  display: block;
}

.download-card span {
  color: var(--muted);
  display: block;
  font-size: 0.9rem;
  margin-top: 4px;
}

.contact-list {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-list a,
.contact-list span {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin: 0 auto;
  max-width: 1120px;
  padding: 22px;
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .hero,
  .grid,
  .download-grid,
  .contact-list {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .section-head {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
  }

  .nav-links a,
  .control {
    font-size: 0.84rem;
  }

  .markdown-menu-panel {
    left: 0;
    right: auto;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .button-row {
    display: none;
  }

  html,
  body {
    background: #fff;
    color: #000;
  }

  .page {
    max-width: none;
    padding: 0;
  }

  .section,
  .hero {
    break-inside: avoid;
    padding: 18px 0;
  }
}