/* NULLPOINT — shared stylesheet
   Military/rugged technical catalog for OEM thermal modules. */

:root {
  --bg: #0a0a0a;
  --bg-1: #111111;
  --bg-2: #161616;
  --bg-3: #1d1d1d;
  --line: #2a2a2a;
  --line-2: #3a3a3a;
  --fg: #e8e6e0;
  --fg-dim: #9a968c;
  --fg-dimmer: #6a6660;
  --accent: oklch(0.75 0.17 55);          /* ironbow orange default */
  --accent-ink: #0a0a0a;
  --warn: oklch(0.72 0.20 25);
  --ok: oklch(0.78 0.16 155);
  --grid-line: rgba(232,230,224,0.04);

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Archivo", "Inter", system-ui, sans-serif;

  --ring: 1px solid var(--line);
  --ring-strong: 1px solid var(--line-2);
}

[data-theme="light"] {
  --bg: #e8e6e0;
  --bg-1: #dedcd5;
  --bg-2: #d2cfc7;
  --bg-3: #c8c4ba;
  --line: #a8a59b;
  --line-2: #88857b;
  --fg: #0a0a0a;
  --fg-dim: #4a4740;
  --fg-dimmer: #6a6660;
  --accent-ink: #e8e6e0;
  --grid-line: rgba(10,10,10,0.05);
}

[data-accent="arctic"]  { --accent: oklch(0.82 0.14 215); }
[data-accent="lava"]    { --accent: oklch(0.68 0.22 25); }
[data-accent="mono"]    { --accent: #e8e6e0; --accent-ink: #0a0a0a; }
[data-theme="light"][data-accent="mono"] { --accent: #0a0a0a; --accent-ink: #e8e6e0; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

h1,h2,h3,h4 { font-family: var(--sans); font-weight: 700; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: clamp(56px, 7vw, 112px); line-height: 0.92; letter-spacing: -0.03em; }
h2 { font-size: clamp(32px, 4vw, 56px); line-height: 0.96; letter-spacing: -0.02em; }
h3 { font-size: 20px; line-height: 1.15; }
a { color: inherit; text-decoration: none; }

/* ---------- utility ---------- */
.mono { font-family: var(--mono); }
.upper { text-transform: uppercase; letter-spacing: 0.08em; }
.tiny  { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; }
.dim   { color: var(--fg-dim); }
.dimmer{ color: var(--fg-dimmer); }
.accent{ color: var(--accent); }
.rule  { height: 1px; background: var(--line); width: 100%; }
.vrule { width: 1px; background: var(--line); align-self: stretch; }
.bracket::before, .bracket::after { color: var(--fg-dim); }
.bracket::before { content: "[ "; }
.bracket::after  { content: " ]"; }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px; border: 1px solid var(--line-2);
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--fg-dim);
  background: var(--bg-1);
}
.tag .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  background: var(--accent); color: var(--accent-ink);
  border: none; cursor: pointer;
  transition: filter .15s ease;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost {
  background: transparent; color: var(--fg); border: 1px solid var(--line-2);
}
.btn.ghost:hover { border-color: var(--fg); }
.btn .arrow { font-family: var(--mono); }

/* corner bracket frame */
.frame { position: relative; }
.frame::before, .frame::after,
.frame > .corner-tl, .frame > .corner-tr, .frame > .corner-bl, .frame > .corner-br { 
  content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none;
  border-color: var(--accent); border-style: solid;
}
.frame::before { top: 0; left: 0; border-width: 1px 0 0 1px; }
.frame::after  { top: 0; right: 0; border-width: 1px 1px 0 0; }
.frame > .corner-bl { bottom: 0; left: 0; border-width: 0 0 1px 1px; }
.frame > .corner-br { bottom: 0; right: 0; border-width: 0 1px 1px 0; }

/* thin grid backdrop */
.gridbg {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
}
.nav .left, .nav .right { display: flex; align-items: center; gap: 22px; }
.nav .right { justify-content: flex-end; }
.nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; font-size: 13px; }
.nav .brand .mark { width: 18px; height: 18px; }
.nav .brand small { color: var(--fg-dim); font-weight: 400; letter-spacing: 0.18em; }
.nav a.link { color: var(--fg-dim); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; }
.nav a.link:hover { color: var(--fg); }
.nav a.link.active { color: var(--fg); }
.nav .status {
  display: flex; align-items: center; gap: 8px;
  font-size: 10px; color: var(--fg-dim); letter-spacing: 0.14em; text-transform: uppercase;
}
.nav .status .dot { width: 6px; height: 6px; background: var(--ok); border-radius: 50%; box-shadow: 0 0 0 3px color-mix(in oklab, var(--ok), transparent 80%); }

/* ---------- meta strip (below nav) ---------- */
.meta-strip {
  display: grid; grid-template-columns: repeat(6, 1fr);
  border-bottom: 1px solid var(--line);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--fg-dim);
}
.meta-strip > div { padding: 8px 16px; border-right: 1px solid var(--line); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.meta-strip > div:last-child { border-right: none; text-align: right; }
.meta-strip b { color: var(--fg); font-weight: 500; margin-right: 6px; }

/* tweaks panel */
.tweaks {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 280px;
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  font-family: var(--mono); font-size: 11px;
  display: none;
}
.tweaks.open { display: block; }
.tweaks header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-bottom: 1px solid var(--line);
  text-transform: uppercase; letter-spacing: 0.16em; font-size: 10px;
  background: var(--bg-2);
}
.tweaks .row {
  display: grid; grid-template-columns: 90px 1fr; align-items: center; gap: 8px;
  padding: 10px 12px; border-bottom: 1px solid var(--line);
}
.tweaks .row:last-child { border-bottom: none; }
.tweaks .row label { text-transform: uppercase; letter-spacing: 0.14em; font-size: 10px; color: var(--fg-dim); }
.tweaks .seg { display: flex; border: 1px solid var(--line-2); }
.tweaks .seg button {
  flex: 1; padding: 6px 4px; background: transparent; color: var(--fg-dim);
  border: none; border-right: 1px solid var(--line-2);
  font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em;
  cursor: pointer;
}
.tweaks .seg button:last-child { border-right: none; }
.tweaks .seg button.on { background: var(--accent); color: var(--accent-ink); }

/* bigger segmented control for configurator */
.seg-big { display: flex; border: 1px solid var(--line-2); }
.seg-big button {
  flex: 1; padding: 10px 8px; background: transparent; color: var(--fg-dim);
  border: none; border-right: 1px solid var(--line-2);
  font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em;
  cursor: pointer;
}
.seg-big button:last-child { border-right: none; }
.seg-big button.on { background: var(--accent); color: var(--accent-ink); }

.qtybtn {
  width: 28px; height: 28px; background: transparent; border: 1px solid var(--line-2);
  color: var(--fg); font-family: var(--mono); cursor: pointer;
}
.qtybtn:hover { border-color: var(--accent); color: var(--accent); }