/* SD&S Tech Inc. — shared styles. Layout: one centred column, generous type, plain sections. */
@font-face { font-family: "Atkinson Hyperlegible"; font-weight: 400; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Atkinson Hyperlegible"; font-weight: 700; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Young Serif"; font-weight: 400; font-display: swap; src: url("fonts/young-serif-latin-400-normal.woff2") format("woff2"); }

:root {
  color-scheme: light;
  --bg: #F4F7F5;
  --surface: #FFFFFF;
  --ink: #17302A;
  --muted: #4A5F58;
  --line: #D3DED9;
  --primary: #1E5E50;
  --on-primary: #FFFFFF;
  --sun: #E9A62C;
  --sun-soft: #FCEBC4;
  --sun-ink: #4A3207;
  --font-display: "Young Serif", Georgia, "Times New Roman", serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", Verdana, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1A17; --surface: #172420; --ink: #EAF2EE; --muted: #A9BCB5; --line: #2C3F39;
    --primary: #84D0BB; --on-primary: #0B1C17; --sun: #F0B54A; --sun-soft: #3A2D12; --sun-ink: #FBE3B0; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1A17; --surface: #172420; --ink: #EAF2EE; --muted: #A9BCB5; --line: #2C3F39;
  --primary: #84D0BB; --on-primary: #0B1C17; --sun: #F0B54A; --sun-soft: #3A2D12; --sun-ink: #FBE3B0; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 19px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font-body); line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--sun); outline-offset: 3px; border-radius: 4px; }

.wrap {
  max-width: 980px; margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}
.narrow { max-width: 720px; }

/* Header */
.site-head { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; padding-block: 16px; }
.brand { font-family: var(--font-display); font-size: 1.35rem; color: var(--ink); text-decoration: none; line-height: 1.2; }
.brand span { color: var(--muted); font-family: var(--font-body); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; margin-left: 6px; }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 20px; }
nav a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 0.9rem; padding: 6px 0; border-bottom: 2px solid transparent; }
nav a:hover, nav a[aria-current="page"] { border-bottom-color: var(--sun); }

/* Type */
h1, h2, h3 { line-height: 1.2; text-wrap: balance; margin: 0; }
h1 { font-family: var(--font-display); font-weight: 400; font-size: clamp(2rem, 6vw, 3.1rem); }
h2 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: 1.05rem; }
p { margin: 0; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 38em; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.75rem; font-weight: 700; color: var(--muted); }

section { padding-block: 56px; }
section + section { border-top: 1px solid var(--line); }
.stack { display: flex; flex-direction: column; gap: 18px; }
.stack-lg { display: flex; flex-direction: column; gap: 32px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px;
  border-radius: 12px; background: var(--primary); color: var(--on-primary); font-weight: 700; text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--ink); border: 2px solid var(--line); }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 14px;
  background: var(--sun-soft); color: var(--sun-ink); font-weight: 700; font-size: 0.85rem; width: fit-content;
}
.pill::before { content: ""; flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--sun); }

/* Grids */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; }
.grid-3 > div { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.grid-3 p { color: var(--muted); }

/* App card */
.app-card {
  display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 28px;
}
.app-card img { width: 112px; border-radius: 26px; }
.app-card .stack { gap: 10px; min-width: 0; }
@media (max-width: 560px) { .app-card { grid-template-columns: 1fr; } .app-card img { width: 88px; border-radius: 20px; } }

/* App hero */
.app-hero { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; }
.app-hero img { width: 128px; border-radius: 30px; }
@media (max-width: 560px) { .app-hero { grid-template-columns: 1fr; } .app-hero img { width: 96px; border-radius: 22px; } }

/* Screenshots */
.shots { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(200px, 1fr); gap: 20px; overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x mandatory; }
.shots figure { margin: 0; display: flex; flex-direction: column; gap: 10px; scroll-snap-align: start; }
.shots img { border-radius: 22px; border: 1px solid var(--line); }
.shots figcaption { font-size: 0.85rem; color: var(--muted); text-align: center; }

/* Puzzle types */
.types { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.types li { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.types .num { width: 36px; height: 36px; border-radius: 50%; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; font-weight: 700; }
.types p { color: var(--muted); }

/* Checklist */
.checks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px 32px; }
.checks li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; }
.checks li::before { content: "✓"; width: 26px; height: 26px; border-radius: 50%; background: var(--sun-soft); color: var(--sun-ink); display: grid; place-items: center; font-weight: 700; font-size: 0.8rem; margin-top: 2px; }

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 10px; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 0 20px; }
summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style-position: outside; }
details[open] summary { border-bottom: 1px solid var(--line); margin-bottom: 12px; }
details p { padding-bottom: 16px; color: var(--muted); }
details p + p { margin-top: -6px; }

.callout { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 8px; }
.email { font-weight: 700; font-size: 1.1rem; user-select: all; }

/* Legal text */
.legal h2 { font-family: var(--font-body); font-weight: 700; font-size: 1.1rem; margin-top: 12px; }
.legal p { color: var(--ink); }

/* Footer */
.site-foot { border-top: 1px solid var(--line); background: var(--surface); }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; padding-block: 28px; color: var(--muted); font-size: 0.85rem; }
.site-foot ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-foot a { color: var(--muted); }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }