/* skinframe.app shared styles */
:root {
  --sf-paper:        #FAFAF7;
  --sf-paper-warm:   #F4F1EA;
  --sf-paper-deep:   #EDE8DC;
  --sf-surface:      #FFFFFF;
  --sf-ink:          #1E2A35;
  --sf-ink-deep:     #0E1418;
  --sf-ink-80:       rgba(30, 42, 53, 0.80);
  --sf-ink-60:       rgba(30, 42, 53, 0.60);
  --sf-ink-40:       rgba(30, 42, 53, 0.40);
  --sf-ink-20:       rgba(30, 42, 53, 0.20);
  --sf-ink-12:       rgba(30, 42, 53, 0.12);
  --sf-ink-08:       rgba(30, 42, 53, 0.08);
  --sf-ink-04:       rgba(30, 42, 53, 0.04);
  --sf-amber:        #C19A4F;
  --sf-amber-deep:   #A57F38;
  --sf-amber-soft:   #E8D9B7;
  --sf-amber-tint:   #F6EFDF;
  --sf-serif: "IBM Plex Serif", Georgia, serif;
  --sf-sans:  "IBM Plex Sans", -apple-system, system-ui, sans-serif;
  --sf-mono:  "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --sf-max:   720px;
  --sf-max-wide: 920px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--sf-paper);
  color: var(--sf-ink);
  font-family: var(--sf-serif);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--sf-ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--sf-ink-20); }
a:hover { text-decoration-color: var(--sf-amber); color: var(--sf-amber-deep); }

/* ── Top nav ───────────────────────────────────────────── */
.sf-nav {
  max-width: var(--sf-max-wide);
  margin: 0 auto;
  padding: 28px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--sf-sans);
  font-size: 14px;
}
.sf-nav-brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sf-serif);
  font-weight: 600; font-size: 17px;
  color: var(--sf-ink);
  text-decoration: none;
}
.sf-nav-brand:hover { color: var(--sf-ink); }
.sf-nav-links { display: flex; gap: 22px; }
.sf-nav-links a {
  color: var(--sf-ink-60);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.1px;
}
.sf-nav-links a:hover { color: var(--sf-ink); }

/* ── Page container ────────────────────────────────────── */
.sf-page {
  max-width: var(--sf-max);
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.sf-page--wide { max-width: var(--sf-max-wide); }

/* ── Type ──────────────────────────────────────────────── */
.sf-eyebrow {
  font-family: var(--sf-sans);
  font-size: 12px; font-weight: 600;
  color: var(--sf-amber-deep);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
h1, .sf-h1 {
  font-family: var(--sf-serif);
  font-size: 48px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -1px;
  margin: 0 0 28px;
  color: var(--sf-ink);
  text-wrap: balance;
}
h2, .sf-h2 {
  font-family: var(--sf-serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin: 56px 0 14px;
  color: var(--sf-ink);
}
h3, .sf-h3 {
  font-family: var(--sf-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.2px;
  margin: 32px 0 8px;
  color: var(--sf-ink);
}
p { margin: 0 0 16px; color: var(--sf-ink-80); }
.sf-lede { font-size: 21px; line-height: 1.5; color: var(--sf-ink-80); margin-bottom: 28px; }
em { color: var(--sf-amber-deep); font-style: italic; }
strong { font-weight: 600; color: var(--sf-ink); }
hr { border: 0; border-top: 1px solid var(--sf-ink-12); margin: 48px 0; }

/* ── Buttons ───────────────────────────────────────────── */
.sf-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 14px;
  background: var(--sf-ink); color: var(--sf-paper);
  font-family: var(--sf-sans); font-size: 15px; font-weight: 600;
  text-decoration: none; letter-spacing: -0.1px;
  border: 0; cursor: pointer;
  transition: transform .12s ease, background .15s ease;
}
.sf-btn:hover { background: var(--sf-ink-deep); color: var(--sf-paper); transform: translateY(-1px); }
.sf-btn-ghost {
  background: transparent;
  color: var(--sf-ink);
  border: 1px solid var(--sf-ink-12);
}
.sf-btn-ghost:hover { background: var(--sf-ink-04); color: var(--sf-ink); }

/* App store badge */
.sf-appstore {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 12px 22px 12px 18px; border-radius: 14px;
  background: var(--sf-ink); color: var(--sf-paper);
  text-decoration: none;
  font-family: var(--sf-sans);
}
.sf-appstore:hover { background: var(--sf-ink-deep); color: var(--sf-paper); transform: translateY(-1px); }
.sf-appstore-tag { font-size: 11px; opacity: .7; letter-spacing: .4px; }
.sf-appstore-name { font-size: 17px; font-weight: 600; letter-spacing: -.3px; }

/* ── Cards / sections ──────────────────────────────────── */
.sf-card {
  background: var(--sf-surface);
  border: 1px solid var(--sf-ink-08);
  border-radius: 18px;
  padding: 24px 26px;
}
.sf-feature {
  padding: 28px 0;
  border-bottom: 1px solid var(--sf-ink-08);
}
.sf-feature:last-child { border-bottom: 0; }
.sf-feature h3 {
  margin: 0 0 6px;
  font-size: 22px;
}
.sf-feature p {
  margin: 0;
  color: var(--sf-ink-80);
}

/* ── Pill / badge ──────────────────────────────────────── */
.sf-pill {
  display: inline-block;
  padding: 4px 11px; border-radius: 999px;
  background: var(--sf-amber-tint);
  color: var(--sf-amber-deep);
  font-family: var(--sf-sans);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.3px;
}

/* ── Footer ────────────────────────────────────────────── */
.sf-foot {
  max-width: var(--sf-max-wide);
  margin: 80px auto 0;
  padding: 48px 24px 40px;
  border-top: 1px solid var(--sf-ink-08);
}
.sf-foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.sf-foot h4 {
  font-family: var(--sf-sans);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--sf-ink-60);
  margin: 0 0 12px;
}
.sf-foot ul {
  list-style: none; margin: 0; padding: 0;
}
.sf-foot li {
  font-family: var(--sf-sans);
  font-size: 14px;
  margin-bottom: 6px;
}
.sf-foot a {
  color: var(--sf-ink);
  text-decoration: none;
}
.sf-foot a:hover { color: var(--sf-amber-deep); }
.sf-foot-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--sf-serif); font-size: 18px; font-weight: 600;
  margin-bottom: 12px;
  color: var(--sf-ink);
  text-decoration: none;
}
.sf-foot-tag {
  font-family: var(--sf-sans);
  font-size: 13px;
  color: var(--sf-ink-60);
  max-width: 280px;
  line-height: 1.5;
}
.sf-foot-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--sf-ink-08);
  font-family: var(--sf-sans);
  font-size: 12px;
  color: var(--sf-ink-60);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}

/* ── Disclaimer block ──────────────────────────────────── */
.sf-disclaimer {
  margin-top: 56px;
  padding: 20px 22px;
  background: var(--sf-paper-warm);
  border: 1px solid var(--sf-ink-08);
  border-radius: 16px;
  font-family: var(--sf-sans);
  font-size: 13px;
  line-height: 1.55;
  color: var(--sf-ink-80);
  display: flex; gap: 14px; align-items: flex-start;
}

/* ── Phone mockup ──────────────────────────────────────── */
.sf-phone {
  width: 268px; height: 560px;
  border-radius: 40px;
  background: #0E1418;
  padding: 7px;
  box-shadow: 0 30px 60px rgba(30, 42, 53, 0.18), 0 0 0 1px rgba(30, 42, 53, 0.08);
  margin: 0 auto;
}
.sf-phone-screen {
  width: 100%; height: 100%; border-radius: 33px;
  background: var(--sf-paper);
  overflow: hidden; position: relative;
}
.sf-phone-row {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.sf-phone-stage { display: flex; flex-direction: column; align-items: center; }
.sf-phone-stage--offset { transform: translateY(48px); }
.sf-phone-caption {
  font-family: var(--sf-sans);
  font-size: 13px;
  color: var(--sf-ink-60);
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
  letter-spacing: -0.1px;
}
.sf-phone-step {
  font-family: var(--sf-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--sf-amber-deep);
}
.sf-selfie-slot {
  width: 72px; height: 72px; border-radius: 14px;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.18) 0 6px, transparent 6px 12px),
    linear-gradient(135deg, #E8D9B7, #C19A4F 70%, #A57F38);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-family: var(--sf-sans);
  text-align: center;
  color: rgba(30, 42, 53, 0.75);
  line-height: 1.1;
}
.sf-selfie-slot span {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.2px;
}
.sf-selfie-slot small {
  font-size: 9px; font-weight: 500;
  margin-top: 3px;
  color: rgba(30, 42, 53, 0.55);
  letter-spacing: 0.1px;
}
@media (max-width: 640px) {
  .sf-phone-row { grid-template-columns: 1fr; gap: 48px; }
  .sf-phone-stage--offset { transform: none; }
}

/* ── Hero ──────────────────────────────────────────────── */
.sf-hero {
  padding: 32px 0 56px;
}
.sf-hero h1 { font-size: 56px; line-height: 1.12; margin-bottom: 36px; }
.sf-hero .sf-lede { margin-top: 0; }
@media (max-width: 640px) {
  h1, .sf-h1 { font-size: 36px; }
  .sf-hero h1 { font-size: 38px; }
  .sf-foot-grid { grid-template-columns: 1fr 1fr; }
  .sf-page { padding: 32px 20px 60px; }
}

/* ── Article specific ──────────────────────────────────── */
.sf-article {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.sf-article h1 { font-size: 40px; margin-bottom: 20px; }
.sf-article p { font-size: 19px; line-height: 1.65; color: var(--sf-ink); }
.sf-article p:first-of-type::first-letter {
  font-family: var(--sf-serif);
  font-size: 64px;
  font-weight: 600;
  float: left;
  line-height: 0.9;
  margin: 6px 8px 0 0;
  color: var(--sf-amber-deep);
}
.sf-article blockquote {
  margin: 32px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--sf-amber);
  font-style: italic;
  color: var(--sf-ink);
  font-size: 22px; line-height: 1.45;
}
.sf-article-meta {
  font-family: var(--sf-sans);
  font-size: 13px;
  color: var(--sf-ink-60);
  margin-bottom: 8px;
  display: flex; align-items: center; gap: 10px;
}
.sf-article-meta .sf-pill { background: var(--sf-paper-warm); color: var(--sf-ink-80); }

/* ── Articles index ────────────────────────────────────── */
.sf-articles-list { list-style: none; margin: 0; padding: 0; }
.sf-articles-list li {
  padding: 28px 0;
  border-top: 1px solid var(--sf-ink-08);
}
.sf-articles-list li:last-child { border-bottom: 1px solid var(--sf-ink-08); }
.sf-articles-list h3 { margin: 6px 0 6px; font-size: 22px; }
.sf-articles-list a { text-decoration: none; }
.sf-articles-list .sf-art-meta {
  font-family: var(--sf-sans);
  font-size: 12px;
  color: var(--sf-ink-60);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  font-weight: 600;
}
.sf-articles-list p { color: var(--sf-ink-60); margin: 0; }
.sf-cat-filter {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin: 24px 0 8px;
  font-family: var(--sf-sans);
}
.sf-cat-filter a {
  padding: 6px 12px; border-radius: 999px;
  font-size: 13px; font-weight: 500;
  background: var(--sf-ink-04); color: var(--sf-ink-80);
  text-decoration: none;
}
.sf-cat-filter a:hover { background: var(--sf-ink-08); color: var(--sf-ink); }
.sf-cat-filter a.is-active { background: var(--sf-ink); color: var(--sf-paper); }

/* ── FAQ ───────────────────────────────────────────────── */
details.sf-faq {
  border-bottom: 1px solid var(--sf-ink-08);
  padding: 18px 0;
}
details.sf-faq summary {
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--sf-serif);
  font-size: 19px; font-weight: 500;
  color: var(--sf-ink);
  letter-spacing: -0.2px;
}
details.sf-faq summary::after {
  content: '＋';
  color: var(--sf-amber-deep);
  font-size: 18px;
  font-weight: 400;
  transition: transform .15s ease;
}
details.sf-faq[open] summary::after { content: '−'; }
details.sf-faq summary::-webkit-details-marker { display: none; }
details.sf-faq p { margin-top: 12px; font-family: var(--sf-serif); font-size: 17px; color: var(--sf-ink-80); }