/* Stetman Engineering — shared styles
   Concept: a drafting sheet. Millimetre grid and a technical sketch in the hero;
   company details laid out as a drawing title block. */

:root {
  --paper: #F2F3F0;
  --paper-2: #E8EAE5;
  --ink: #1C2026;
  --ink-2: #5A616A;
  --rule: #C3C8C2;
  --pen: #2248C4;
  --pen-ink: #FFFFFF;          /* text on --pen fill */
  --pen-soft: rgba(34, 72, 196, 0.10);
  --grid-minor: rgba(34, 72, 196, 0.055);
  --grid-major: rgba(34, 72, 196, 0.12);

  --f-display: "Unbounded", "Arial Black", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Onest", "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --wrap: 1120px;
  --gutter: clamp(20px, 4vw, 40px);
  --header-h: 64px;

  color-scheme: light dark;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14171B;
    --paper-2: #1B1F24;
    --ink: #E6E8E4;
    --ink-2: #9BA2AA;
    --rule: #343B43;
    --pen: #8AA4FF;
    --pen-ink: #0E1320;
    --pen-soft: rgba(138, 164, 255, 0.13);
    --grid-minor: rgba(138, 164, 255, 0.045);
    --grid-major: rgba(138, 164, 255, 0.10);
  }
}
:root[data-theme="dark"] {
  --paper: #14171B;
  --paper-2: #1B1F24;
  --ink: #E6E8E4;
  --ink-2: #9BA2AA;
  --rule: #343B43;
  --pen: #8AA4FF;
  --pen-ink: #0E1320;
  --pen-soft: rgba(138, 164, 255, 0.13);
  --grid-minor: rgba(138, 164, 255, 0.045);
  --grid-major: rgba(138, 164, 255, 0.10);
}

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

html {
  height: auto;
  scroll-padding-top: calc(env(safe-area-inset-top, 0px) + var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

img, svg { max-width: 100%; }

a { color: var(--pen); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--pen); outline-offset: 3px; border-radius: 3px; }


.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: -9999px; top: 8px; z-index: 20;
  background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 4px;
}
.skip:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header {
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    backdrop-filter: saturate(1.2) blur(10px);
    -webkit-backdrop-filter: saturate(1.2) blur(10px);
  }
}
.bar {
  display: flex; align-items: center; gap: 12px 28px;
  min-height: var(--header-h);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px; margin-right: auto;
  color: var(--ink); text-decoration: none; white-space: nowrap;
  font-family: var(--f-display); font-weight: 600; font-size: 15px; letter-spacing: 0.02em;
}
.brand svg { width: 24px; height: 24px; flex: none; color: var(--pen); }
.brand .sub { font-weight: 400; color: var(--ink-2); }

.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a {
  color: var(--ink); text-decoration: none; font-size: 15px; white-space: nowrap;
  padding: 6px 0; border-bottom: 1.5px solid transparent;
}
.nav-links a:hover { color: var(--pen); }
.nav-links a[aria-current="page"] { color: var(--pen); border-bottom-color: var(--pen); }


@media (max-width: 760px) {
  :root { --header-h: 104px; }
  .bar { flex-wrap: wrap; padding-top: 10px; row-gap: 4px; }
  .brand .sub { display: none; }
  .nav-links {
    order: 3; flex: 1 0 100%;
    gap: 20px; overflow-x: auto; scrollbar-width: none;
    margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter) 6px;
  }
  .nav-links::-webkit-scrollbar { display: none; }
}

/* ---------- Buttons ---------- */
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 20px;
  font: 500 16px/1.2 var(--f-body); text-decoration: none; text-align: center;
  border: 1.5px solid var(--ink); border-radius: 6px; color: var(--ink); background: transparent;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; border-color: var(--pen); color: var(--pen); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--pen); border-color: var(--pen); color: var(--pen-ink); }

/* ---------- Hero ---------- */
.hero {
  border-bottom: 1px solid var(--rule);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 50px 50px, 50px 50px, 10px 10px, 10px 10px;
  background-position: -1px -1px;
}
.hero .wrap {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 6fr);
  align-items: center; gap: 40px 56px;
  padding-top: clamp(48px, 9vw, 112px); padding-bottom: clamp(48px, 8vw, 96px);
}
.hero h1 {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(32px, 4.6vw, 56px); line-height: 1.08; letter-spacing: -0.01em;
  margin: 0 0 24px; max-width: 17ch; text-wrap: balance;
}
.hero .lead {
  font-size: clamp(17px, 1.7vw, 20px); line-height: 1.55; color: var(--ink-2);
  max-width: 42ch; margin: 0 0 32px;
}
.drawing { width: 100%; height: auto; display: block; color: var(--ink); }
.drawing .ln { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.drawing .fill { fill: var(--paper); }
.drawing .soft { fill: none; stroke: var(--rule); stroke-width: 1.5; stroke-linecap: round; }
.drawing .pen { fill: none; stroke: var(--pen); stroke-width: 1.5; }
.drawing .dim { fill: none; stroke: var(--pen); stroke-width: 1; }
.drawing .ext { fill: none; stroke: var(--pen); stroke-width: 1; opacity: .55; }
.drawing .bar-bg { fill: var(--pen-soft); }
.drawing .bar-fg { fill: var(--pen); }
.drawing .dot { fill: var(--pen); }
.drawing text { fill: var(--ink-2); font: 500 14px var(--f-body); }
@media (max-width: 560px) { .drawing text { font-size: 17px; } }
.drawing .arrow { fill: var(--pen); }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .drawing { max-width: 520px; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(56px, 8vw, 96px) 0; border-bottom: 1px solid var(--rule); }
.section.last { border-bottom: 0; }

.split { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 24px clamp(24px, 5vw, 64px); }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

h2 {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(24px, 3vw, 34px); line-height: 1.15; letter-spacing: -0.005em;
  margin: 0 0 12px;
}
.note { color: var(--ink-2); margin: 0 0 24px; max-width: 36ch; }
.split > div > .actions { margin-top: 8px; }

/* Ruled list (services) */
.list { margin: 0; padding: 0; list-style: none; border-top: 1.5px solid var(--ink); }
.list li {
  padding: 22px 0; border-bottom: 1px solid var(--rule);
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 6px 32px;
}
.list h3 { margin: 0; font-size: 19px; font-weight: 600; line-height: 1.35; }
.list p { margin: 0; color: var(--ink-2); }
@media (max-width: 640px) { .list li { grid-template-columns: 1fr; } }

/* ---------- Apps ---------- */
.apps { margin: 0; padding: 0; list-style: none; border-top: 1.5px solid var(--ink); }
.app {
  display: grid; grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 8px 24px; align-items: start;
  padding: 28px 0; border-bottom: 1px solid var(--rule);
}
.app-icon { width: 72px; height: 72px; display: block; color: var(--ink); }
.app h3 {
  margin: 2px 0 4px; font-family: var(--f-display); font-weight: 600;
  font-size: 22px; line-height: 1.2; letter-spacing: 0;
}
.app .platform { margin: 0 0 10px; color: var(--ink-2); font-size: 15px; }
.app .desc { margin: 0; max-width: 56ch; }
.app .side { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.status {
  display: inline-block; white-space: nowrap;
  font-size: 13px; font-weight: 500; line-height: 1;
  padding: 7px 10px; border-radius: 999px;
  color: var(--pen); background: var(--pen-soft);
}
.app .btn { min-height: 40px; padding: 0 16px; font-size: 15px; }
@media (max-width: 640px) {
  .app { grid-template-columns: 56px minmax(0, 1fr); }
  .app-icon { width: 56px; height: 56px; }
  .app .side { grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; margin-top: 8px; }
}

/* ---------- Principles ---------- */
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-top: 36px; }
.principles div { border-top: 1.5px solid var(--ink); padding-top: 18px; }
.principles h3 { margin: 0 0 8px; font-size: 19px; font-weight: 600; line-height: 1.35; }
.principles p { margin: 0; color: var(--ink-2); }
@media (max-width: 860px) { .principles { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- About + title block ---------- */
.about-text { max-width: 62ch; margin: 0 0 8px; }
.about-text p { margin: 0 0 14px; }

.stamp {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px; background: var(--ink); border: 2px solid var(--ink);
  margin-top: 36px; font-variant-numeric: tabular-nums;
}
.stamp .cell { background: var(--paper); padding: 14px 16px 16px; min-width: 0; }
.stamp .k { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; line-height: 1.3; }
.stamp .v { display: block; font-size: 16px; font-weight: 500; line-height: 1.4; overflow-wrap: anywhere; }
.stamp a.v { width: fit-content; }
.stamp .v + .v { margin-top: 4px; }
.stamp .v.sub { font-size: 14px; font-weight: 400; color: var(--ink-2); }
.stamp .name { grid-column: span 3; }
.stamp .name .v:first-of-type { font-family: var(--f-display); font-weight: 600; font-size: clamp(15px, 1.8vw, 19px); letter-spacing: 0.01em; }
.stamp .wide { grid-column: span 2; }
.stamp .code .v { font-family: var(--f-display); font-size: 19px; letter-spacing: 0.06em; }
@media (max-width: 760px) {
  .stamp { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stamp .name, .stamp .wide, .stamp .code, .stamp .m-wide { grid-column: span 2; }
  .stamp .v { font-size: 15px; }
  .stamp .m-end { order: 1; }
}

/* ---------- Document pages (privacy, support) ---------- */
.doc main .wrap { padding-top: clamp(40px, 7vw, 80px); padding-bottom: clamp(56px, 8vw, 96px); }
.doc article { max-width: 72ch; }
.doc h1 {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(28px, 4.4vw, 46px); line-height: 1.12; margin: 0 0 12px;
}
.doc .meta { color: var(--ink-2); margin: 0 0 36px; }
.doc article h2 { font-family: var(--f-body); font-size: 21px; font-weight: 600; margin: 40px 0 10px; letter-spacing: 0; }
.doc ul { padding-left: 1.25em; }
.doc li { margin: 6px 0; }
.doc details { border-top: 1px solid var(--rule); padding: 16px 0; }
.doc details:last-of-type { border-bottom: 1px solid var(--rule); }
.doc summary { cursor: pointer; font-weight: 600; font-size: 18px; padding-right: 8px; }
.doc summary:hover { color: var(--pen); }
.doc details p { margin: 10px 0 0; }
.callout {
  border-left: 3px solid var(--pen); background: var(--pen-soft);
  padding: 16px 20px; border-radius: 0 6px 6px 0; margin: 24px 0;
}
.callout p { margin: 0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1.5px solid var(--ink); padding: 36px 0 44px; font-size: 15px; color: var(--ink-2); }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: start; }
.site-footer .legal { margin: 0; line-height: 1.5; }
.site-footer .legal strong { color: var(--ink); font-weight: 600; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: flex-end; }
.site-footer nav a { color: var(--ink); }
@media (max-width: 640px) {
  .site-footer .wrap { grid-template-columns: 1fr; }
  .site-footer nav { justify-content: flex-start; }
}

@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } }

.doc article h3 { font-size: 17px; font-weight: 600; margin: 24px 0 6px; }
.doc article h2 + h3 { margin-top: 12px; }