/*
  style.css — Portal Info UT
  Design language: "kartu modul" — evokes the printed course modules and
  semester-credit (SKS) system that defines distance study at a place like
  this, rendered as a calm, editorial paper surface with an indigo/gold
  seal accent rather than a generic SaaS look.
*/

:root {
  --ink: #1c2333;
  --ink-soft: #4a5268;
  --paper: #f3f1ec;
  --paper-raised: #ffffff;
  --indigo: #0a4d8c;
  --indigo-deep: #062f57;
  --gold: #c79a3c;
  --line: #dcd6c8;
  --danger: #a23b2e;

  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 4px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; color: var(--indigo-deep); }
h1 { font-size: clamp(2rem, 4vw, 2.75rem); font-weight: 600; }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.75rem); margin-top: 2.5rem; }
a { color: var(--indigo); }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--indigo-deep); color: #fff;
  padding: 0.75rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---- Header ---- */
.site-header {
  background: var(--paper-raised);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.header-inner {
  display: flex; align-items: center; gap: 1.5rem; padding: 0.9rem 1.25rem;
  flex-wrap: wrap;
}
.logo {
  font-family: var(--font-display); font-weight: 700; font-size: 1.25rem;
  color: var(--indigo-deep); text-decoration: none; letter-spacing: 0.02em;
}
.main-nav ul { list-style: none; display: flex; gap: 1.25rem; margin: 0; padding: 0; flex-wrap: wrap; }
.main-nav a { text-decoration: none; color: var(--ink); font-size: 0.94rem; }
.main-nav a:hover { color: var(--indigo); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: var(--radius); padding: 0.4rem 0.7rem; }
.header-search { display: flex; align-items: center; gap: 0.4rem; margin-left: auto; }
.header-search input {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 0.45rem 0.7rem;
  font-family: var(--font-body); min-width: 180px;
}
.header-search button { border: none; background: none; cursor: pointer; font-size: 1rem; }
.cta-button {
  display: inline-block; background: var(--indigo); color: #fff !important; text-decoration: none;
  padding: 0.6rem 1.1rem; border-radius: var(--radius); font-weight: 600; font-size: 0.92rem;
  border: 1px solid var(--indigo);
}
.cta-button:hover { background: var(--indigo-deep); }
.cta-button.secondary { background: transparent; color: var(--indigo) !important; }
.cta-button.block { display: block; text-align: center; }

/* ---- Breadcrumb (ledger-line style) ---- */
.breadcrumb { padding: 0.75rem 1.25rem; font-size: 0.85rem; color: var(--ink-soft); }
.breadcrumb ol { list-style: none; display: flex; gap: 0.4rem; margin: 0; padding: 0; flex-wrap: wrap; }
.breadcrumb li:not(:last-child)::after { content: "›"; margin-left: 0.4rem; color: var(--line); }
.breadcrumb a { text-decoration: none; color: var(--ink-soft); }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(180deg, var(--indigo-deep), var(--indigo));
  color: #f3f1ec; padding: 3.5rem 0;
}
.hero-inner { text-align: left; max-width: 720px; }
.hero h1 { color: #fff; }
.hero p { font-size: 1.05rem; color: #d7e2ee; margin-bottom: 1.75rem; }
.hero-cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero .cta-button.secondary { color: #fff !important; border-color: rgba(255,255,255,0.5); }

/* ---- Category grid (the "seal" signature) ---- */
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-top: 1.25rem; }
.category-card {
  background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem 1rem; text-align: center; text-decoration: none; color: var(--ink);
  position: relative; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.category-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(10,77,140,0.12); }
.category-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--gold);
  font-size: 1.3rem; margin-bottom: 0.6rem;
}
.category-name { display: block; font-weight: 600; }

/* ---- Article cards (kartu modul) ---- */
.article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 1.25rem; }
.article-card {
  background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: box-shadow 0.15s ease;
}
.article-card:hover { box-shadow: 0 8px 20px rgba(28,35,51,0.1); }
.article-card a { text-decoration: none; color: inherit; }
.article-card img { aspect-ratio: 16/9; object-fit: cover; }
.article-card h3 { font-size: 1.05rem; margin: 0.8rem 1rem 0.3rem; color: var(--ink); }
.article-card p { font-size: 0.9rem; color: var(--ink-soft); margin: 0 1rem 1rem; }

.see-all-link { display: inline-block; margin-top: 1.25rem; font-weight: 600; text-decoration: none; }
.popular-list { padding-left: 1.2rem; }
.popular-list li { margin-bottom: 0.5rem; }

section.container { padding: 2.5rem 1.25rem; }

/* ---- Single article ---- */
.article-header { max-width: 760px; margin: 0 auto 1.5rem; }
.article-category a { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; text-decoration: none; color: var(--gold); }
.article-meta { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-soft); display: flex; gap: 0.6rem; flex-wrap: wrap; }
.share-row { display: flex; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap; }
.share-row button, .share-row a {
  border: 1px solid var(--line); background: var(--paper-raised); border-radius: var(--radius);
  padding: 0.4rem 0.8rem; font-size: 0.85rem; text-decoration: none; color: var(--ink); cursor: pointer;
}
.article-hero { width: 100%; max-height: 420px; object-fit: cover; border-radius: var(--radius); margin-bottom: 1.5rem; }
.toc { max-width: 760px; margin: 0 auto 2rem; background: var(--paper-raised); border: 1px solid var(--line); border-left: 4px solid var(--gold); padding: 1rem 1.25rem; border-radius: var(--radius); }
.toc h2 { margin-top: 0; font-size: 1.05rem; }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc-level-3 { margin-left: 1rem; font-size: 0.92rem; }
.article-body { max-width: 760px; margin: 0 auto; }
.article-body h2 { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.article-faq { max-width: 760px; margin: 2rem auto; }
.article-faq details { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem 1rem; margin-bottom: 0.6rem; background: var(--paper-raised); }
.article-faq summary { font-weight: 600; cursor: pointer; }
.author-box { max-width: 760px; margin: 2rem auto; padding: 1rem; border: 1px dashed var(--line); border-radius: var(--radius); }
.tag-list { max-width: 760px; margin: 1rem auto; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag-chip { font-family: var(--font-mono); font-size: 0.78rem; text-decoration: none; color: var(--indigo); border: 1px solid var(--line); border-radius: 999px; padding: 0.25rem 0.7rem; }

/* ---- Static pages / archive / search ---- */
.static-page, .archive-listing, .search-results, .not-found { max-width: 900px; margin: 0 auto; padding: 2.5rem 1.25rem; }
.page-cta { display: flex; gap: 0.75rem; margin-top: 2rem; flex-wrap: wrap; }
.whatsapp-button {
  background: #2e7d5b; color: #fff; text-decoration: none; padding: 0.6rem 1.1rem;
  border-radius: var(--radius); font-weight: 600; font-size: 0.92rem;
}
.empty-state { color: var(--ink-soft); }
.pagination { display: flex; gap: 1rem; align-items: center; margin-top: 2rem; font-size: 0.9rem; }
.search-form-large { display: flex; gap: 0.5rem; margin: 1.25rem 0 2rem; }
.search-form-large input { flex: 1; padding: 0.6rem 0.9rem; border: 1px solid var(--line); border-radius: var(--radius); }
.search-form-large button { padding: 0.6rem 1.2rem; background: var(--indigo); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; }
.result-count { color: var(--ink-soft); font-size: 0.9rem; }

/* ---- Footer ---- */
.site-footer { background: var(--indigo-deep); color: #d7e2ee; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; padding: 3rem 1.25rem 1.5rem; }
.footer-grid h3, .footer-grid h4 { color: #fff; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid a { color: #d7e2ee; text-decoration: none; font-size: 0.92rem; line-height: 2; }
.disclaimer { font-size: 0.8rem; color: #a9bdd3; margin-top: 0.75rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); padding: 1rem 1.25rem; font-size: 0.8rem; color: #a9bdd3; }

/* ---- Sticky mobile CTA ---- */
.sticky-cta-mobile { display: none; }
@media (max-width: 720px) {
  .sticky-cta-mobile {
    position: fixed; bottom: 0; left: 0; right: 0; display: flex; gap: 0.5rem;
    padding: 0.6rem; background: var(--paper-raised); border-top: 1px solid var(--line); z-index: 30;
  }
  .sticky-cta-mobile > * { flex: 1; text-align: center; }
  .main-nav ul { display: none; }
  .main-nav.open ul { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--paper-raised); padding: 1rem; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: block; }
  body { padding-bottom: 64px; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

/* Visible keyboard focus */
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }