/* ===========================================================================
   sMLX website — shared styles
   Pure CSS, no dependencies. Responsive + automatic light/dark.
   =========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-card: #ffffff;
  --text: #1d1d1f;
  --text-soft: #515154;
  --text-dim: #86868b;
  --border: #e3e3e6;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --hero-from: #1a1a2e;
  --hero-to: #16213e;
  --hero-text: #f5f5f7;
  --code-bg: #f5f5f7;
  --max-width: 980px;
  --radius: 18px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-soft: #1c1c1e;
    --bg-card: #1c1c1e;
    --text: #f5f5f7;
    --text-soft: #c7c7cc;
    --text-dim: #8e8e93;
    --border: #2c2c2e;
    --accent: #2997ff;
    --accent-hover: #4faaff;
    --hero-from: #000000;
    --hero-to: #1a1a2e;
    --hero-text: #f5f5f7;
    --code-bg: #1c1c1e;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------- Top navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
  .nav { background: rgba(0, 0, 0, 0.8); }
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
}
.nav-brand:hover { text-decoration: none; }
.nav-brand img { width: 26px; height: 26px; border-radius: 6px; }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-soft); font-size: 14px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--hero-from), var(--hero-to));
  color: var(--hero-text);
  text-align: center;
  padding: 92px 22px 100px;
}
.hero img.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  margin-bottom: 28px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero .tagline {
  font-size: 23px;
  color: rgba(245, 245, 247, 0.85);
  max-width: 640px;
  margin: 0 auto 36px;
  font-weight: 400;
}
.btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }
.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: var(--hero-text);
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--hero-text);
  text-decoration: none;
}

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.alt { background: var(--bg-soft); }
.section-title {
  text-align: center;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 19px;
  max-width: 600px;
  margin: 0 auto 52px;
}

/* ---------- Feature grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
}
.card .ico { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--text-soft); font-size: 16px; }

/* ---------- Models table ---------- */
.model-list { display: grid; gap: 16px; }
.model-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-shadow: var(--shadow);
}
.model-item .m-name { font-weight: 600; font-size: 19px; }
.model-item .m-meta { color: var(--text-dim); font-size: 14px; margin-top: 4px; }
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 980px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(0, 113, 227, 0.12);
  color: var(--accent);
  white-space: nowrap;
}
.badge.warn { background: rgba(255, 149, 0, 0.15); color: #c75e00; }
@media (prefers-color-scheme: dark) {
  .badge.warn { color: #ff9f0a; }
}

/* ---------- System requirements / strip ---------- */
.strip {
  text-align: center;
  padding: 60px 22px;
}
.strip h2 { font-size: 30px; font-weight: 700; margin-bottom: 10px; }
.strip p { color: var(--text-soft); }

/* ---------- Legal / document pages ---------- */
.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 22px 90px;
}
.doc h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.doc .updated { color: var(--text-dim); font-size: 15px; margin-bottom: 40px; }
.doc h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 40px 0 14px;
  padding-top: 8px;
}
.doc h3 { font-size: 19px; font-weight: 600; margin: 26px 0 10px; }
.doc p { margin-bottom: 16px; color: var(--text-soft); }
.doc ul, .doc ol { margin: 0 0 16px 24px; color: var(--text-soft); }
.doc li { margin-bottom: 8px; }
.doc strong { color: var(--text); }
.doc a { word-break: break-word; }
.callout {
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 22px 0;
}
.callout.warn { border-left-color: #ff9500; }
code, .mono {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, "Courier New", monospace;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 14px;
}

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.faq summary {
  font-weight: 600;
  font-size: 18px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 24px; color: var(--text-dim); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 14px; color: var(--text-soft); }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 44px 22px 36px;
  font-size: 14px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: center;
  margin-bottom: 22px;
  list-style: none;
}
.footer-links a { color: var(--text-soft); }
.footer-copy { text-align: center; color: var(--text-dim); }
.footer-copy a { color: var(--text-dim); }

/* ---------- Responsive ---------- */
@media (max-width: 700px) {
  .hero h1 { font-size: 38px; }
  .hero .tagline { font-size: 19px; }
  .section-title { font-size: 30px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  body { font-size: 16px; }
}
@media (max-width: 460px) {
  .nav-links { display: none; }
}