/* mac4dstem.com — shared styles. No build step, no dependencies, no web fonts. */

:root {
  --ash:    #E4E6E4;
  --panel:  #F2F3F1;
  --ink:    #15171A;
  --muted:  #62676C;
  --hair:   #C9CCC9;
  --amber:  #9A6B08;
  --spot:   21, 23, 26;

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --gutter: clamp(1.25rem, 5vw, 3rem);
  --measure: 66rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ash:   #121316;
    --panel: #1A1C20;
    --ink:   #E7E9E7;
    --muted: #9AA0A6;
    --hair:  #2C3034;
    --amber: #D9A441;
    --spot:  231, 233, 231;
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--ash);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--amber); color: var(--ash); }

.wrap {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ---- skip link ---- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--ash);
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.6rem 1rem;
  z-index: 10;
}

.skip:focus { left: 0.5rem; top: 0.5rem; }

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

a { color: inherit; }

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

.u-link {
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  padding-bottom: 0.12rem;
  transition: color 0.15s ease;
}

.u-link:hover { color: var(--amber); }

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

.masthead {
  border-bottom: 1px solid var(--hair);
}

.masthead > .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.1rem;
}

.masthead-mark {
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.masthead-mark img {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 0.3rem;
  display: block;
  flex: none;
}

.masthead-mark em { font-style: normal; color: var(--amber); }

.masthead nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.masthead nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.masthead nav a:hover { color: var(--ink); }

/* Source link. Carries the mark so it reads as an outbound link rather than
   another section anchor, but stays plain text-weight — the amber pill next to
   it must remain the only action in the row. */
.masthead nav a.nav-source {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.masthead nav a.nav-source svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
  flex: none;
}

/* The one action on the page. Amber outline rather than a filled block: the
   rest of the site is typographic and restrained, so a loud button would read
   as an advert. Negative margin keeps the masthead row the same height it was
   before the pill was added. */
.masthead nav a.nav-download {
  color: var(--amber);
  border: 1px solid var(--amber);
  border-radius: 999px;
  padding: 0.42rem 0.9rem;
  margin-block: -0.42rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.masthead nav a.nav-download:hover {
  background: var(--amber);
  color: var(--ash);
}

/* ---- shared type ---- */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.5rem;
}

.eyebrow::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--amber);
  flex: none;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin: 0 0 1.6rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--hair);
}

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

.site-footer {
  border-top: 1px solid var(--hair);
  margin-top: clamp(3.5rem, 9vw, 6rem);
}

.site-footer > .wrap {
  padding-block: 1.6rem clamp(2rem, 5vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer a {
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-footer a:hover { color: var(--ink); }

/* ---- document pages (privacy / support / impressum) ---- */

.doc {
  padding-block: clamp(2.5rem, 7vw, 4.5rem) 0;
  max-width: 44rem;
}

.doc h1 {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4.5vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

.doc .updated {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 2.5rem;
}

.doc h2 {
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 2.6rem 0 0.7rem;
}

.doc h2:first-of-type { margin-top: 0; }

.doc p, .doc li { color: var(--muted); }

.doc p { margin: 0 0 1rem; max-width: 62ch; }

.doc ul { margin: 0 0 1rem; padding-left: 1.1rem; max-width: 62ch; }

.doc li { margin-bottom: 0.45rem; }

.doc strong { color: var(--ink); font-weight: 600; }

.doc a { color: var(--ink); }

.doc .lede {
  color: var(--ink);
  font-size: 1.08rem;
  line-height: 1.5;
  margin-bottom: 2rem;
}

.callout {
  background: var(--panel);
  border: 1px solid var(--hair);
  border-left: 2px solid var(--amber);
  padding: 1.1rem 1.25rem;
  margin: 0 0 1.5rem;
}

.callout p:last-child { margin-bottom: 0; }

.contact-block {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.9;
  background: var(--panel);
  border: 1px solid var(--hair);
  padding: 1.1rem 1.25rem;
  margin: 0 0 1.5rem;
  color: var(--ink);
}