/* =========================================================================
   Theme: Blueprint — technical / spec-sheet
   Cool paper, graphite ink, signal amber accent, hairline grid,
   monospaced labels and metric callouts.
   ========================================================================= */

[data-theme="blueprint"] {
  --bg:          oklch(98.4% 0.004 240);
  --bg-2:        oklch(95.0% 0.006 240);
  --bg-3:        oklch(91.0% 0.008 240);
  --fg:          oklch(18.0% 0.006 250);
  --fg-muted:    oklch(42.0% 0.008 250);
  --fg-subtle:   oklch(55.0% 0.008 250);
  --rule:        oklch(84.0% 0.008 245);
  --accent:      oklch(72.0% 0.180 70);   /* signal amber */
  --accent-ink:  oklch(28.0% 0.030 60);
  --accent-tint: oklch(96.0% 0.050 75);
  --on-accent:   oklch(15.0% 0.005 240);

  --font-display: "Space Grotesk", "IBM Plex Sans", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", "Inter Tight", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
}

[data-theme="blueprint"] body {
  background:
    linear-gradient(to right, transparent calc(100% - 1px), color-mix(in oklch, var(--rule) 60%, transparent) calc(100% - 1px)) 0 0 / calc(100% / 12) 100%,
    var(--bg);
  background-attachment: fixed;
}

[data-theme="blueprint"] .brand-mark {
  background: transparent;
  color: var(--fg);
  border: 1.5px solid var(--fg);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
[data-theme="blueprint"] .brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 18px;
  text-transform: uppercase;
}
[data-theme="blueprint"] .brand-tag {
  border-left: 1px solid var(--rule);
  padding-left: 10px;
  margin-left: 4px;
}

[data-theme="blueprint"] .kicker, [data-theme="blueprint"] .eyebrow {
  color: var(--fg);
  border: 1px solid var(--rule);
  padding: 5px 10px;
  display: inline-flex; align-items: center; gap: 8px;
}
[data-theme="blueprint"] .kicker::before {
  content: ""; width: 8px; height: 8px; background: var(--accent);
}

/* Hero — schematic feel */
[data-theme="blueprint"] .hero {
  padding-block: clamp(72px, 9vw, 132px);
  border-top: 2px solid var(--fg);
  border-bottom: 1px solid var(--rule);
  position: relative;
}
[data-theme="blueprint"] .hero::before {
  content: "FIG. 01 / SURFACE TREATMENT EXPERTISE — SINCE 1995";
  position: absolute; top: -10px; left: var(--gutter);
  transform: translateY(-50%);
  background: var(--bg); padding: 0 10px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  color: var(--fg);
}
[data-theme="blueprint"] .hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.8rem, 1.8rem + 5.0vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.028em;
  max-width: 22ch;
  text-transform: uppercase;
  margin-top: var(--s-5);
}
[data-theme="blueprint"] .hero h1 em { color: var(--accent); font-style: normal; }
[data-theme="blueprint"] .hero .lead {
  margin-top: var(--s-5);
  font-family: var(--font-body); font-weight: 400;
  font-size: var(--step-1);
  max-width: 56ch;
}
[data-theme="blueprint"] .hero .metrics {
  margin-top: var(--s-7);
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border: 1px solid var(--rule);
}
@media (min-width: 720px) {
  [data-theme="blueprint"] .hero .metrics { grid-template-columns: repeat(4, 1fr); }
}
[data-theme="blueprint"] .hero .metric {
  padding: var(--s-5);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
[data-theme="blueprint"] .hero .metric:last-child { border-bottom: 0; }
@media (min-width: 720px) {
  [data-theme="blueprint"] .hero .metric:nth-child(even) { border-right: 0; }
  [data-theme="blueprint"] .hero .metric:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
  [data-theme="blueprint"] .hero .metric:nth-last-child(-n+2) { border-bottom: 0; }
}
[data-theme="blueprint"] .hero .metric .v {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 1.4rem + 2vw, 3rem); letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
[data-theme="blueprint"] .hero .metric .l {
  margin-top: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--fg-muted);
}

/* Section heads */
[data-theme="blueprint"] .section-title {
  display: grid; grid-template-columns: 1fr; gap: var(--s-4);
  align-items: end;
  border-bottom: 1px solid var(--fg);
  padding-bottom: var(--s-4);
  margin-bottom: var(--s-7);
}
@media (min-width: 720px) {
  [data-theme="blueprint"] .section-title { grid-template-columns: 200px 1fr; }
}
[data-theme="blueprint"] .section-title .label {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--fg);
  display: flex; align-items: center; gap: 10px;
}
[data-theme="blueprint"] .section-title .label::before {
  content: ""; width: 14px; height: 1.5px; background: var(--accent);
}

/* Cards — index card */
[data-theme="blueprint"] .card {
  background: var(--bg);
  border: 1px solid var(--rule);
  padding: var(--s-3);
  transition: border-color 200ms var(--ease-out-quart);
}
[data-theme="blueprint"] .card:hover { border-color: var(--fg); }
[data-theme="blueprint"] .card .media {
  border: 1px solid var(--rule);
  filter: contrast(1.04) saturate(0.9);
}
[data-theme="blueprint"] .card .meta {
  padding-top: var(--s-3);
  border-top: 1px dashed var(--rule);
  margin-top: var(--s-3);
}
[data-theme="blueprint"] .card .title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-weight: 600;
  font-size: var(--step-1);
  letter-spacing: 0.005em;
  line-height: 1.18;
  font-variation-settings: normal;
}
[data-theme="blueprint"] .card .more { color: var(--fg); }
[data-theme="blueprint"] .card .more::before { content: "→"; margin-right: 8px; }

/* Solution table */
[data-theme="blueprint"] .solutions { display: grid; gap: 0; border: 1px solid var(--rule); }
[data-theme="blueprint"] .solutions .row {
  display: grid; grid-template-columns: 1fr; gap: var(--s-3);
  padding: var(--s-5);
  border-bottom: 1px solid var(--rule);
  transition: background 180ms var(--ease-out-quart);
}
[data-theme="blueprint"] .solutions .row:hover { background: var(--bg-2); }
[data-theme="blueprint"] .solutions .row:last-child { border-bottom: 0; }
@media (min-width: 720px) {
  [data-theme="blueprint"] .solutions .row { grid-template-columns: 80px 1fr 2fr; align-items: baseline; gap: var(--s-5); }
}
[data-theme="blueprint"] .solutions .row .num {
  font-family: var(--font-mono); font-size: var(--step-1); color: var(--accent);
  font-weight: 700; font-variant-numeric: tabular-nums;
}
[data-theme="blueprint"] .solutions .row h3 {
  font-family: var(--font-display); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.005em;
  font-size: var(--step-1);
}
[data-theme="blueprint"] .solutions .row p {
  font-size: var(--step-0);
  color: var(--fg-muted);
}

/* Logo wall */
[data-theme="blueprint"] .logos {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border: 1px solid var(--rule);
}
@media (min-width: 720px) {
  [data-theme="blueprint"] .logos { grid-template-columns: repeat(6, 1fr); }
}
[data-theme="blueprint"] .logos li {
  aspect-ratio: 5 / 3;
  display: grid; place-items: center;
  padding: var(--s-4);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}
[data-theme="blueprint"] .logos li img {
  max-height: 32px; width: auto; object-fit: contain;
  filter: grayscale(1) brightness(0);
  opacity: 0.55;
  transition: opacity 220ms var(--ease-out-quart), filter 220ms var(--ease-out-quart);
}
[data-theme="blueprint"] .logos li:hover img { opacity: 0.85; }

/* Detail page — engineering dossier */
[data-theme="blueprint"] .article-hero {
  padding-block: var(--s-8);
  border-bottom: 1px solid var(--rule);
}
[data-theme="blueprint"] .article-hero .breadcrumb {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--fg-muted);
}
[data-theme="blueprint"] .article-hero h1 {
  font-family: var(--font-display); font-weight: 700;
  text-transform: uppercase;
  font-size: clamp(2.2rem, 1.6rem + 3vw, 4rem);
  line-height: 0.98; letter-spacing: -0.022em;
  max-width: 22ch;
  margin-top: var(--s-4);
}
[data-theme="blueprint"] .article-hero .lede {
  margin-top: var(--s-5);
  font-family: var(--font-body); font-weight: 400;
  font-size: var(--step-1); max-width: 60ch;
}
[data-theme="blueprint"] .article-hero figure {
  margin-top: var(--s-6);
  border: 1px solid var(--rule);
  aspect-ratio: 16 / 7;
  overflow: hidden;
}
[data-theme="blueprint"] .article-hero figure img { width: 100%; height: 100%; object-fit: cover; }
[data-theme="blueprint"] .article-body {
  padding-block: var(--s-8);
  display: grid; grid-template-columns: 1fr; gap: var(--s-7);
}
@media (min-width: 880px) {
  [data-theme="blueprint"] .article-body { grid-template-columns: 220px 1fr; gap: var(--s-8); }
}
[data-theme="blueprint"] .article-body h3 {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 12px; color: var(--accent);
  margin-bottom: var(--s-3);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
[data-theme="blueprint"] .article-body p { font-size: var(--step-0); line-height: 1.6; max-width: 64ch; }

/* Form */
[data-theme="blueprint"] .field input,
[data-theme="blueprint"] .field select,
[data-theme="blueprint"] .field textarea {
  background: var(--bg);
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: 14px;
}

/* Buttons: technical */
[data-theme="blueprint"] .btn { border-radius: 0; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.12em; }
[data-theme="blueprint"] .btn-ghost { border-radius: 0; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.12em; }