/* StoreySG guides + homepage-features styles.
   Loaded on every page alongside styles.css (which owns tokens, .nav, .foot).
   This file adds: language switch, homepage feature/differentiator blocks,
   and the long-form article layout (breadcrumb, callouts, tables, CTA, FAQ). */

/* ---- brand logo mark in nav/footer ---- */
.brand { display: inline-flex; align-items: center; gap: 9px; }
.brand img { width: 26px; height: 26px; display: block; }

/* ---- hero illustration ---- */
.hero-art img { width: min(460px, 94%); height: auto; filter: drop-shadow(0 26px 44px rgba(28,26,23,.16)); }

/* ---- "see it in action" product screenshots (browser-window frame) ---- */
.showcase { padding: 50px 0; border-top: 1px solid var(--line); }
.showcase h2 { font-size: clamp(24px, 3.5vw, 32px); margin: 0 0 8px; }
.showcase .sub { color: var(--muted); font-size: 18px; max-width: 44em; margin: 0 0 30px; }
.showcase .feature-video { margin: 0 0 22px; border-radius: 16px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 18px 46px rgba(28,26,23,.14); background: #0b1120; }
.showcase .feature-video video { width: 100%; height: auto; display: block; }
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
/* dark contrast band for the showcase, to break the all-cream rhythm */
.showcase.dark { background: #0b1120; border-top: none; margin-top: 8px; }
.showcase.dark > h2 { color: #ffffff; }
.showcase.dark > .sub { color: #a8b0c0; }
.showcase.dark .feature-video { border-color: #232a38; box-shadow: 0 22px 60px rgba(0,0,0,.5); }
.showcase.dark .shot { background: #141821; border-color: #242c3b; box-shadow: 0 14px 36px rgba(0,0,0,.35); }
.showcase.dark .shot .bar { background: #1b2230; border-color: #242c3b; }
.showcase.dark .shot .bar i { background: #39435a; }
.showcase.dark .shot .cap b { color: #ffffff; }
.showcase.dark .shot .cap span { color: #9aa3b4; }
.shot { background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; box-shadow: 0 12px 34px rgba(28,26,23,.10); }
.shot .bar { display: flex; gap: 6px; align-items: center; padding: 9px 12px; border-bottom: 1px solid var(--line); background: #f1ede6; }
.shot .bar i { width: 10px; height: 10px; border-radius: 50%; background: #d6d0c6; display: inline-block; }
.shot > img { width: 100%; height: auto; display: block; background: #0b1120; }
.shot .cap { padding: 13px 15px; }
.shot .cap b { display: block; font-size: 15px; margin-bottom: 2px; }
.shot .cap span { color: var(--muted); font-size: 13px; }

/* ---- language switch in the nav ---- */
.nav nav .lang {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
}
.nav nav .lang:hover { background: var(--card); color: var(--brand); }

/* ================= HOMEPAGE: differentiator section ================= */
.features { padding: 48px 0; border-top: 1px solid var(--line); }
.features > h2 { font-size: clamp(24px, 3.5vw, 32px); margin: 0 0 8px; }
.features > .sub { color: var(--muted); font-size: 18px; max-width: 42em; margin: 0 0 30px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.feature .ic {
  flex: none;
  width: 60px; height: 60px;
  display: grid; place-items: center;
}
.feature .ic img { width: 60px; height: 60px; object-fit: contain; }
.feature h3 { margin: 2px 0 6px; font-size: 19px; }
.feature p { margin: 0; color: var(--muted); }
.feature .plain { color: var(--ink); font-size: 14px; margin-top: 8px; }
.feature .tag {
  display: inline-block; margin-top: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: .02em;
  color: var(--accent); text-transform: uppercase;
}

/* ================= GUIDES INDEX ================= */
.guides-hero { padding: 44px 0 8px; display: flex; align-items: center; gap: 36px; justify-content: space-between; }
.guides-hero h1 { font-size: clamp(28px, 4.5vw, 40px); margin: 0 0 12px; }
.guides-hero p { color: var(--muted); font-size: 18px; max-width: 40em; }
.guides-hero img { width: 230px; height: auto; flex: none; }
.guide-cat { padding: 28px 0 8px; }
.guide-cat h2 { font-size: 20px; margin: 0 0 14px; color: var(--brand); display: flex; align-items: center; gap: 11px; }
.guide-cat h2 img { width: 32px; height: 32px; object-fit: contain; }
@media (max-width: 860px) { .guides-hero img { display: none; } }
.guide-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 12px; }
.guide-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  transition: box-shadow .15s ease, transform .05s ease;
}
.guide-card:hover { box-shadow: 0 10px 28px rgba(28,26,23,.10); }
.guide-card .k { font-size: 12px; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .03em; }
.guide-card h3 { margin: 6px 0 6px; font-size: 17px; line-height: 1.3; }
.guide-card p { margin: 0; color: var(--muted); font-size: 14px; }

/* ================= ARTICLE ================= */
.crumb { max-width: 760px; margin: 0 auto; padding: 18px 20px 0; font-size: 13px; color: var(--muted); }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--brand); }

.article { max-width: 760px; margin: 0 auto; padding: 14px 20px 56px; }
.article header { margin-bottom: 26px; }
.art-ill { float: right; width: 150px; height: auto; margin: 0 0 14px 22px; }
@media (max-width: 600px) { .art-ill { float: none; display: block; width: 120px; margin: 0 0 8px; } }
.article .k {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .03em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.article h1 { font-size: clamp(27px, 4vw, 38px); margin: 0 0 14px; }
.article .meta { color: var(--muted); font-size: 14px; }
.article .lede { font-size: 19px; line-height: 1.55; color: #2e2b27; margin: 18px 0 0; }

.article h2 { font-size: 24px; margin: 38px 0 12px; padding-top: 10px; }
.article h3 { font-size: 19px; margin: 26px 0 8px; }
.article p, .article li { font-size: 17px; line-height: 1.7; color: #2e2b27; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin: 6px 0; }
.article a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.article a:hover { color: var(--accent); }
.article strong { color: var(--ink); }
.article img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--line); }
.article hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }

/* tables (cable specs, energy costs, comparisons) */
.article .table-wrap { overflow-x: auto; margin: 18px 0; }
.article table { width: 100%; border-collapse: collapse; font-size: 15px; }
.article th, .article td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article thead th { background: rgba(31,58,147,.05); color: var(--brand); font-weight: 700; }
.article tbody tr:nth-child(even) { background: rgba(28,26,23,.02); }

/* callouts */
.callout { border-radius: 12px; padding: 14px 16px; margin: 20px 0; font-size: 15px; line-height: 1.6; border: 1px solid var(--line); }
.callout p { font-size: 15px; margin: 0; }
.callout p + p { margin-top: 8px; }
.callout.note { background: rgba(31,58,147,.05); border-color: rgba(31,58,147,.25); }
.callout.tip  { background: #ecfdf3; border-color: #a6e9c1; }
.callout.warn { background: #fff4e5; border-color: var(--accent); }
.callout .lbl { display: block; font-weight: 700; margin-bottom: 4px; }
.callout.note .lbl { color: var(--brand); }
.callout.tip  .lbl { color: #117a3d; }
.callout.warn .lbl { color: #8a4b10; }

/* key-fact stat strip */
.keyfacts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 22px 0; }
.keyfacts div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.keyfacts .n { font-size: 22px; font-weight: 800; color: var(--brand); letter-spacing: -.01em; }
.keyfacts .l { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* in-article product CTA */
.cta-box {
  margin: 34px 0 8px;
  background: linear-gradient(180deg, #ffffff, #f6f3ee);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.cta-box h3 { margin: 0 0 6px; font-size: 19px; }
.cta-box p { margin: 0 0 14px; color: var(--muted); font-size: 15px; }

/* FAQ */
.faq { margin: 30px 0 0; }
.faq h2 { margin-bottom: 8px; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { font-weight: 700; cursor: pointer; font-size: 16px; color: var(--ink); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--accent); font-weight: 800; }
.faq details[open] summary::before { content: "– "; }
.faq details p { margin: 10px 0 2px; }

/* related + disclaimer */
.related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.related h2 { font-size: 18px; margin: 0 0 14px; }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; }
.related a { font-size: 15px; }
.disclaimer { margin-top: 28px; font-size: 13px; color: var(--muted); line-height: 1.6; }

@media (max-width: 860px) {
  /* keep the language switch + Guides reachable on mobile (override styles.css hide-all) */
  .nav nav .lang { display: inline-block; }
  .nav nav a[href="/guides/"], .nav nav a[href="/zh/guides/"] { display: inline-block; }
  .showcase .shots { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .guide-list { grid-template-columns: 1fr; }
  .keyfacts { grid-template-columns: 1fr; }
  .related ul { grid-template-columns: 1fr; }
}