:root {
  --bg: #f7f7fa;
  --bg-card: #ffffff;
  --ink: #1a1a1f;
  --ink-soft: #5a5a66;
  --ink-faint: #8a8a96;
  --accent: #4a8df0;
  --accent-soft: #eaf1fd;
  --rule: #e6e6ec;
  --shadow: 0 8px 28px rgba(20, 20, 40, 0.06);
  --radius: 16px;
  --max: 1080px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1014;
    --bg-card: #181a20;
    --ink: #f2f2f5;
    --ink-soft: #b6b8c0;
    --ink-faint: #7a7c85;
    --accent: #79a8f5;
    --accent-soft: #1c2738;
    --rule: #25272e;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: var(--accent-soft);
  color: var(--ink);
  padding: 1px 6px;
  border-radius: 5px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  max-width: var(--max);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.05rem;
}
.brand img { border-radius: 7px; }

.nav nav { display: flex; gap: 22px; }
.nav nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.nav nav a:hover { color: var(--ink); text-decoration: none; }

main { max-width: var(--max); margin: 0 auto; padding: 0 28px; }

section { padding: 64px 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: none; }

h1, h2, h3 { color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 4vw + 1rem, 3.4rem); line-height: 1.08; margin: 0 0 18px; font-weight: 700; }
h2 { font-size: 1.7rem; margin: 0 0 24px; font-weight: 650; }
h3 { font-size: 1.1rem; margin: 0 0 8px; font-weight: 600; }
p  { margin: 0 0 14px; color: var(--ink-soft); }
.lede { font-size: 1.18rem; color: var(--ink-soft); max-width: 36ch; }
.meta { color: var(--ink-faint); font-size: 0.92rem; }
.accent { color: var(--accent); }

.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 72px;
}
.hero-art img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--bg-card);
}
.hero-copy h1 { color: var(--ink); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card p { margin: 0; }

.gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
.gallery figure { margin: 0; }
.gallery img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--bg-card);
}
.gallery figcaption {
  margin-top: 10px;
  color: var(--ink-faint);
  font-size: 0.92rem;
  text-align: center;
}

details {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
details + details { margin-top: 10px; }
details[open] summary { margin-bottom: 8px; }
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  position: relative;
  padding-right: 24px;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  color: var(--ink-faint);
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 1;
}
details[open] summary::after { content: "−"; }
details p { margin: 6px 0 0; }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px;
  color: var(--ink-faint);
  font-size: 0.9rem;
  text-align: center;
}
footer a { color: var(--ink-faint); }
footer a:hover { color: var(--ink); }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 28px; padding-top: 36px; }
  .lede { max-width: none; }
  .grid { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: 1fr; }
  section { padding: 44px 0; }
  .nav { padding: 16px 20px; }
  main { padding: 0 20px; }
}

@media (max-width: 540px) {
  .grid { grid-template-columns: 1fr; }
  .nav nav { gap: 14px; }
  .nav nav a { font-size: 0.88rem; }
}