:root {
  --bg: #0b1020;
  --card: #121a2f;
  --text: #e7ebff;
  --muted: #9aa3c7;
  --accent: #4f7cff;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(
    900px circle at 20% 10%,
    #1b2a6b 0%,
    var(--bg) 55%,
    #060a16 100%
  );
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Arial,
    sans-serif;
}

.frame {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 16px 48px;
}

.hero {
  text-align: center;
  margin-bottom: 24px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: 0.3px;
}

.subtitle {
  color: var(--muted);
  margin-top: 6px;
}

.card {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.03),
    rgba(255, 255, 255, 0.01)
  );
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 18px 16px;
  margin: 16px 0;
  backdrop-filter: blur(4px);
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
  color: #cfe0ff;
}

ul {
  padding-left: 18px;
  color: var(--muted);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.gallery figure {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0e1430;
}

.gallery img {
  display: block;
  width: 100%;
  height: auto; /* ให้สูงตามสัดส่วนจริง */
  max-height: 420px; /* จำกัดความสูงไม่ให้ยาวเกินไป */
  object-fit: contain; /* ไม่ครอปภาพ */
  background: #0e1430;
}

.gallery figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  padding: 8px 10px;
  border-top: 1px solid var(--border);
}

.hint {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

code {
  background: #0c1230;
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 6px;
  color: #cfe0ff;
}

.footer {
  text-align: center;
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.95rem;
}