* {
  box-sizing: border-box;
}

:root {
  --bg: #09090b;
  --panel: rgba(20, 20, 24, 0.92);
  --panel-soft: rgba(28, 28, 34, 0.84);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f4f4f5;
  --muted: #b5b8c5;
  --accent: #c1121f;
  --accent-soft: rgba(193, 18, 31, 0.16);
}

body {
  margin: 0;
  font-family: "Prompt", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.03) 50%, rgba(255, 255, 255, 0.03) 75%, transparent 75%, transparent),
    radial-gradient(circle at top right, rgba(193, 18, 31, 0.18), transparent 28%),
    linear-gradient(180deg, #0b0b0e 0%, #111115 100%);
  background-size: 14px 14px, 100% 100%, 100% 100%;
}

.spec-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.back-link:hover {
  color: var(--text);
}

.spec-hero,
.spec-panel {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

.spec-hero {
  padding: 32px;
}

.spec-kicker {
  display: inline-flex;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.spec-hero h1 {
  margin: 18px 0 10px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
}

.spec-hero p {
  margin: 0;
  max-width: 70ch;
  color: var(--muted);
  line-height: 1.7;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.88rem;
  text-decoration: none;
}

a.chip:hover {
  border-color: rgba(193, 18, 31, 0.42);
  color: var(--text);
}

.cover {
  width: 100%;
  margin-top: 28px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  background: var(--panel-soft);
}

.cover img {
  display: block;
  width: 100%;
  height: auto;
}

.spec-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.spec-gallery figure {
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  overflow: hidden;
  background: var(--panel-soft);
}

.spec-gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.spec-gallery figcaption {
  padding: 10px 14px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.spec-panel {
  padding: 24px;
}

.spec-panel h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.spec-panel p,
.spec-panel li {
  color: var(--muted);
  line-height: 1.7;
}

.spec-panel ul {
  padding-left: 18px;
  margin: 0;
}

.spec-panel code,
.spec-footer code,
.spec-hero code {
  color: var(--text);
  font-family: "Prompt", monospace;
}

.spec-footer {
  margin-top: 24px;
  padding: 20px 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
}

.spec-index-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.spec-index-card {
  display: block;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel);
  color: inherit;
  text-decoration: none;
}

.spec-index-card:hover {
  border-color: rgba(193, 18, 31, 0.42);
}

.spec-index-card h2 {
  margin: 16px 0 10px;
}

.spec-index-card p {
  color: var(--muted);
  line-height: 1.65;
}

.spec-index-card .chip-list {
  margin-top: 16px;
}

@media (max-width: 820px) {
  .spec-grid,
  .spec-index-grid,
  .spec-gallery {
    grid-template-columns: 1fr;
  }

  .spec-shell {
    width: min(100% - 24px, 1120px);
    padding-top: 28px;
  }

  .spec-hero,
  .spec-panel {
    padding: 20px;
  }
}