/* KERNWELL — a dark technical design for a precision-machining range.
   Distinct from the light editorial families: near-black ground, one machined-amber accent,
   monospace for every measured value, and hairline rules instead of filled panels. */

:root {
  color-scheme: dark;
  --ground: #0e1116;
  --panel: #14181f;
  --panel-2: #1a1f28;
  --ink: #e8ecf1;
  --ink-2: #a9b3c0;
  --ink-3: #6f7b8a;
  --rule: #262d38;
  --accent: #d9a441;
  --accent-ink: #14181f;
  --ok: #5fbf8f;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shell: 1180px;
  --step: clamp(1.1rem, 0.7rem + 1.1vw, 1.55rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.shell { width: min(100% - 2.5rem, var(--shell)); margin-inline: auto; }

/* ---------------------------------------------------------------- masthead */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(180deg, var(--panel) 0%, var(--ground) 100%);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(6px);
}

.masthead-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 0.85rem 0;
}

.brand { display: flex; align-items: baseline; gap: 0.6rem; }
.brand strong {
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
}
.brand span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.site-nav { display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem; margin-inline-start: auto; }
.site-nav a {
  color: var(--ink-2);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); text-decoration: none; border-bottom-color: var(--rule); }
.site-nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------------------------------------------------------------- headings */

h1, h2, h3 { line-height: 1.15; margin: 0 0 0.6rem; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.1rem, 1.2rem + 3.4vw, 3.6rem); }
h2 { font-size: clamp(1.4rem, 0.95rem + 1.7vw, 2.1rem); }
h3 { font-size: 1.05rem; }

p { margin: 0 0 1rem; color: var(--ink-2); }
p.lead { font-size: var(--step); color: var(--ink); max-width: 62ch; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.7rem;
}

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 0 0 1.1rem;
}
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin-inline: 0.4rem; }

/* ---------------------------------------------------------------- sections */

.section { padding: clamp(2.2rem, 1.2rem + 3vw, 4rem) 0; border-top: 1px solid var(--rule); }
.section:first-of-type { border-top: 0; }
.section-head { max-width: 68ch; margin-bottom: 1.6rem; }
.section-head.spaced { margin-top: 2rem; }

.hero { padding: clamp(2.4rem, 1.4rem + 4vw, 5rem) 0 clamp(1.6rem, 1rem + 2vw, 2.6rem); }
.hero-grid { display: grid; gap: clamp(1.4rem, 1rem + 2vw, 3rem); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: center; } }

.hero-figure { border: 1px solid var(--rule); background: var(--panel); }
.hero-figure img { width: 100%; }
.hero-figure figcaption {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  padding: 0.6rem 0.8rem;
  border-top: 1px solid var(--rule);
}

/* ---------------------------------------------------------------- grids */

.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }

.card {
  border: 1px solid var(--rule);
  background: var(--panel);
  padding: 1.1rem 1.2rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.card h3 { margin: 0; color: var(--ink); }
.card p { margin: 0; font-size: 0.92rem; }
.card .tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.card a.more { font-family: var(--mono); font-size: 0.76rem; margin-top: auto; }

.product-card { border: 1px solid var(--rule); background: var(--panel); display: flex; flex-direction: column; }
.product-card img { border-bottom: 1px solid var(--rule); }
.product-card .body { padding: 1rem 1.1rem 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; }
.product-card h3 { margin: 0; }
.product-card .body p { margin: 0; font-size: 0.9rem; }
.product-card .body a.more { font-family: var(--mono); font-size: 0.76rem; margin-top: 0.4rem; }

/* ---------------------------------------------------------------- data */

.spec-list { margin: 0 0 1.2rem; border-top: 1px solid var(--rule); }
.spec-list > div {
  display: grid;
  gap: 0.2rem 1.2rem;
  grid-template-columns: minmax(0, 1fr);
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
}
@media (min-width: 700px) { .spec-list > div { grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); } }
.spec-list dt {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}
.spec-list dd { margin: 0; color: var(--ink-2); font-size: 0.94rem; }

.table-scroll { overflow-x: auto; margin: 0 0 1.2rem; border: 1px solid var(--rule); }
table { border-collapse: collapse; width: 100%; min-width: 32rem; }
caption {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--rule);
}
th, td { text-align: left; padding: 0.65rem 0.9rem; border-bottom: 1px solid var(--rule); font-size: 0.9rem; }
thead th {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}
tbody th { color: var(--ink); font-weight: 500; }
tbody td { color: var(--ink-2); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }

/* ---------------------------------------------------------------- notes */

details {
  border: 1px solid var(--rule);
  background: var(--panel);
  padding: 0.85rem 1rem;
  margin: 0 0 0.7rem;
}
details[open] { background: var(--panel-2); }
summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--ink);
}
summary::marker { color: var(--accent); }
details p { margin: 0.6rem 0 0; font-size: 0.92rem; }

.note {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  border-left: 2px solid var(--accent);
  padding: 0.35rem 0 0.35rem 0.8rem;
  margin: 0 0 1.2rem;
}

.demo-band {
  border: 1px solid var(--rule);
  background: var(--panel-2);
  padding: 0.7rem 1rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  margin: 0 0 1.4rem;
}
.demo-band strong { color: var(--accent); }

/* ---------------------------------------------------------------- links */

.link-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.2rem; }
.link-row a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  border: 1px solid var(--rule);
  padding: 0.5rem 0.85rem;
  color: var(--ink);
  background: var(--panel);
}
.link-row a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.link-row a.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.link-row a.primary:hover { background: #e6b455; color: var(--accent-ink); }

.next-links { display: grid; gap: 0.6rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); margin-top: 1.2rem; }
.next-links a {
  border: 1px solid var(--rule);
  background: var(--panel);
  padding: 0.8rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.next-links a span { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.next-links a b { font-weight: 500; color: var(--ink); }
.next-links a:hover { border-color: var(--accent); text-decoration: none; }
.next-links a:hover b { color: var(--accent); }

/* ---------------------------------------------------------------- footer */

.site-foot { border-top: 1px solid var(--rule); margin-top: 2rem; padding: 1.8rem 0 2.6rem; }
.site-foot p { font-size: 0.82rem; color: var(--ink-3); }
.site-foot .links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; margin-bottom: 0.8rem; }
.site-foot .links a { font-size: 0.82rem; color: var(--ink-2); }

/* ---------------------------------------------------------------- utilities */

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6rem 1rem;
  z-index: 40;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

main:focus { outline: none; }

/* PLANAXIS — the second range in this family. The same structure with a cool steel accent and a
   tighter rule weight, so the two ranges read as siblings rather than as one design twice. */
.planaxis {
  --ground: #0b0e13;
  --panel: #12161d;
  --panel-2: #171c25;
  --ink: #e6ebf2;
  --ink-2: #9fabb9;
  --ink-3: #66727f;
  --rule: #212834;
  --accent: #6fb6d9;
  --accent-ink: #0b0e13;
}
.planaxis h1, .planaxis h2 { letter-spacing: -0.015em; }
.planaxis .eyebrow { letter-spacing: 0.24em; }
.planaxis .card, .planaxis .product-card, .planaxis .next-links a { border-width: 1px; }
.planaxis .link-row a.primary { background: var(--accent); border-color: var(--accent); }
.planaxis .link-row a.primary:hover { background: #86c6e4; }
.planaxis .spec-list dt { letter-spacing: 0.1em; }
/* TURNSTONE — the third range in this family. A warm oxide accent on a warmer ground, so a
   fastening range reads differently from the two machining ranges beside it. */
.turnstone {
  --ground: #100d0c;
  --panel: #181413;
  --panel-2: #1f1a18;
  --ink: #f0eae6;
  --ink-2: #b3a8a1;
  --ink-3: #7a6e67;
  --rule: #2c2523;
  --accent: #c8763f;
  --accent-ink: #100d0c;
}
.turnstone h1, .turnstone h2 { letter-spacing: -0.008em; }
.turnstone .eyebrow { letter-spacing: 0.16em; }
.turnstone .spec-list dt { color: var(--accent); letter-spacing: 0.08em; }
.turnstone .link-row a.primary { background: var(--accent); border-color: var(--accent); }
.turnstone .link-row a.primary:hover { background: #d98a52; }
.turnstone .card, .turnstone .product-card { background: var(--panel-2); }