/* ==========================================================================
   RAGAM THEME - Core Stylesheet
   Struktur: 1) Reset & base  2) Tipografi  3) Layout  4) Header & Nav
   5) Hero  6) Card artikel  7) Ad slot  8) Sidebar/Widget  9) Footer
   10) Komentar  11) Aksesibilitas  12) Back to Top  13) Responsive
   ========================================================================== */

:root{
  --color-ink:#16211C;
  --color-ink-soft:#3E4A44;
  --color-paper:#FFFFFF;
  --color-paper-alt:#F1F3EF;
  --color-accent:#2F6F5E;
  --color-accent-dark:#204F42;
  --color-gold:#C99A1E;
  --color-line:#DADFD6;
  --color-line-soft:#E9ECE7;
  --radius:10px;
  --font-heading:'Bricolage Grotesque', sans-serif;
  --font-body:'IBM Plex Sans', sans-serif;
  --container-width:1160px;
}

/* ---------- 1. Reset & base ---------- */
*, *::before, *::after{ box-sizing:border-box; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, ul, ol{ margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family:var(--font-body);
  color:var(--color-ink);
  background:var(--color-paper);
  line-height:1.65;
  font-size:16px;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
.container{ max-width:var(--container-width); margin:0 auto; padding:0 24px; }

/* ---------- 2. Tipografi ---------- */
h1, h2, h3, h4, .site-title{
  font-family:var(--font-heading);
  color:var(--color-ink);
  line-height:1.15;
  font-weight:600;
  letter-spacing:-0.01em;
}
.entry-content p{ margin-bottom:16px; font-size:16.5px; color:var(--color-ink-soft); }
.entry-content blockquote{
  border-left:3px solid var(--color-gold);
  padding:4px 0 4px 18px;
  margin:24px 0;
  font-family:var(--font-heading);
  font-size:18px;
  font-style:italic;
}
.entry-content h2{ font-size:24px; margin:32px 0 14px; }
.entry-content h3{ font-size:20px; margin:26px 0 12px; }
.entry-content img{ border-radius:var(--radius); margin:20px 0; }
.entry-content a{ color:var(--color-accent); text-decoration:underline; text-underline-offset:3px; }

/* Bullet/numbered list di dalam konten artikel/halaman.
   Reset global di atas (ul{list-style:none}, ul/ol{padding:0}) sengaja
   dipakai untuk menu & komponen UI theme (nav, footer, TOC, dst) yang
   memang tidak butuh bullet — tapi itu ikut "memakan" list yang ditulis
   editor di dalam artikel kalau tidak di-override khusus di sini. */
.entry-content ul,
.entry-content ol{
  margin:0 0 16px;
  padding-left:1.4em;
  color:var(--color-ink-soft);
}
.entry-content ul{ list-style:disc; }
.entry-content ol{ list-style:decimal; }
.entry-content ul ul{ list-style:circle; }
.entry-content ul ul ul{ list-style:square; }
.entry-content li{ margin-bottom:6px; }
.entry-content li > ul,
.entry-content li > ol{ margin-top:6px; margin-bottom:0; }

/* Embed responsif: iframe YouTube/Maps/lainnya yang ditempel manual di konten */
.ragam-embed-responsive{
  position:relative; height:0; overflow:hidden; border-radius:var(--radius);
  margin:24px 0; padding-bottom:var(--ragam-embed-ratio, 56.25%);
}
.ragam-embed-responsive iframe{
  position:absolute; top:0; left:0; width:100%; height:100%; border:0;
}

/* Tabel responsif: scroll horizontal di layar kecil, bukan merusak layout */
.ragam-table-responsive{ overflow-x:auto; margin:24px 0; border:1px solid var(--color-line); border-radius:var(--radius); }
.ragam-table-responsive table{ width:100%; border-collapse:collapse; font-size:14.5px; }
.ragam-table-responsive th, .ragam-table-responsive td{ padding:10px 14px; border-bottom:1px solid var(--color-line); text-align:left; }
.ragam-table-responsive th{ background:var(--color-paper-alt); font-family:var(--font-heading); font-weight:600; }
.ragam-table-responsive tr:last-child td{ border-bottom:none; }

/* ---------- 3. Layout dasar ---------- */
.site-content-layout{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:44px;
  padding:44px 24px;
  max-width:var(--container-width);
  margin:0 auto;
  align-items:start;
}
.site-content-layout.no-sidebar{ grid-template-columns:1fr; max-width:820px; }
.section-title{
  font-size:22px; margin-bottom:20px; display:flex; align-items:center; gap:12px;
}
.section-title::after{ content:""; flex:1; height:1px; background:var(--color-line); }

/* ---------- 4. Header & navigasi ---------- */
.site-header{
  border-bottom:1px solid var(--color-line);
  background:var(--color-paper);
  position:sticky; top:0; z-index:20;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 24px; gap:12px 24px; flex-wrap:wrap;
  max-width:var(--container-width); margin:0 auto;
}
.site-branding{ display:flex; align-items:center; gap:10px; }
.site-branding img.custom-logo{ max-height:36px; max-width:160px; width:auto; height:auto; }
.site-title{ font-size:22px; font-weight:700; }
.site-title a{ display:flex; align-items:center; gap:8px; }
.logo-mark{
  width:30px; height:30px; border-radius:8px; background:var(--color-accent);
  color:#fff; font-family:var(--font-heading); font-weight:700; font-size:15px;
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.main-navigation ul{ display:flex; flex-wrap:wrap; gap:10px 26px; }
.main-navigation a{
  font-size:14.5px; font-weight:500; color:var(--color-ink-soft);
  padding:6px 2px; border-bottom:2px solid transparent;
  transition:border-color .15s ease, color .15s ease;
}
.main-navigation a:hover,
.main-navigation a:focus-visible,
.main-navigation .current-menu-item > a{
  border-color:var(--color-accent); color:var(--color-ink);
}
.menu-toggle{
  display:none; background:none; border:1px solid var(--color-line);
  border-radius:8px; width:40px; height:40px; font-size:18px; cursor:pointer;
}

.breadcrumb{
  font-size:13px; color:var(--color-ink-soft); padding:16px 24px 0;
  max-width:var(--container-width); margin:0 auto;
}
.breadcrumb a{ color:var(--color-accent); }
.breadcrumb a:hover{ text-decoration:underline; }

/* ---------- 5. Hero (post terbaru di homepage) ---------- */
.hero{ padding:44px 24px 40px; background:var(--color-paper-alt); border-bottom:1px solid var(--color-line); }
.hero-inner{
  display:grid; grid-template-columns:1.15fr 0.85fr; gap:36px; align-items:center;
  max-width:var(--container-width); margin:0 auto;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12.5px; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color:var(--color-accent-dark); margin-bottom:14px;
}
.eyebrow::before{ content:""; width:16px; height:2px; background:var(--color-gold); display:inline-block; }
.hero h1{ font-size:36px; margin-bottom:16px; }
.hero .lead{ font-size:16.5px; color:var(--color-ink-soft); max-width:52ch; margin-bottom:20px; }
.meta-row{ display:flex; flex-wrap:wrap; align-items:center; gap:14px; font-size:13.5px; color:var(--color-ink-soft); }
.avatar{
  width:28px; height:28px; border-radius:50%; background:var(--color-accent); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:600;
  font-family:var(--font-heading); flex-shrink:0;
}
.hero-thumb{
  aspect-ratio:16/11; border-radius:var(--radius); overflow:hidden;
  background:linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
}
.hero-thumb img{ width:100%; height:100%; object-fit:cover; }

/* ---------- 6. List Item (horizontal) ----------
   Satu komponen dipakai konsisten di: grid homepage/kategori/terkait
   (2 kolom), dan list 1 kolom di sidebar (Populer/Terbaru) & 404.
   Thumbnail SENGAJA horizontal (bukan di atas seperti card vertikal) —
   supaya tetap ringkas dibaca sekilas di list yang berjejer ke bawah. */
.card-grid{ display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:8px; }
.list-item{
  display:flex; gap:14px; align-items:flex-start;
  border:1px solid var(--color-line); border-radius:var(--radius);
  padding:12px; background:var(--color-paper);
  transition:box-shadow .18s ease, border-color .18s ease;
}
.list-item:hover{ box-shadow:0 4px 14px rgba(22,33,28,0.06); border-color:var(--color-line-soft); }
.list-thumb{
  width:120px; height:84px; flex-shrink:0; border-radius:8px; overflow:hidden;
  background:var(--color-paper-alt); display:block;
}
.list-thumb img{ width:100%; height:100%; object-fit:cover; }
.list-info{ display:flex; flex-direction:column; gap:5px; min-width:0; padding-top:2px; }
.card-cat{
  font-size:11px; font-weight:600; letter-spacing:.06em; text-transform:uppercase;
  display:inline-block; color:var(--color-gold);
}
.list-title{ font-size:15.5px; line-height:1.35; margin:0; }
.list-title a{ display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.list-title a:hover{ color:var(--color-accent); }
.list-meta{ font-size:12px; color:#7C877F; display:flex; gap:8px; }

/* List 1 kolom (sidebar Populer/Terbaru, 404) — thumbnail sedikit lebih kecil */
.stacked-list .list-item{ padding:0; border:none; }
.stacked-list .list-thumb{ width:88px; height:64px; }
.stacked-list .list-item + .list-item{
  margin-top:14px; padding-top:14px; border-top:1px solid var(--color-line-soft);
}
.stacked-list .list-title{ font-size:13.5px; }

/* Kode warna kategori — dipakai lintas topik pada niche campuran supaya
   pembaca bisa membedakan jenis konten sekilas. Tambahkan warna baru di sini
   jika kategori situs kamu bertambah, lalu daftarkan slug-nya di
   inc/template-functions.php pada fungsi ragam_category_color_class(). */
.cat-color-1{ color:#2F6F5E; }
.cat-color-2{ color:#C25B2E; }
.cat-color-3{ color:#3466A6; }
.cat-color-4{ color:#8A5FB0; }
.cat-color-5{ color:#C99A1E; }
.cat-color-6{ color:#B33F62; }

/* ---------- 7. Ad slot ---------- */
/* CLS FIX: min-height di-reserve SEBELUM iklan selesai render, supaya
   tidak ada lompatan tata letak begitu AdSense selesai load. Angka dipilih
   mendekati ukuran unit iklan umum (leaderboard/responsive banner ~90-100px,
   medium rectangle 250px) — kalau ukuran iklanmu beda, sesuaikan di sini. */
.ad-slot{
  border:1px dashed #C7CFC4; border-radius:var(--radius);
  background:var(--color-paper-alt);
  padding:18px; text-align:center; margin:28px 0;
  display:flex; flex-direction:column; justify-content:center;
}
.ad-slot--banner{ min-height:100px; }
.ad-slot--rectangle{ min-height:250px; }
.ad-slot .ad-label{
  font-size:11px; letter-spacing:.1em; text-transform:uppercase;
  color:#8A9389; font-weight:600; margin-bottom:10px; display:block;
}
.ad-slot .widget{ border:none; padding:0; margin:0; background:none; }

/* ---------- 8. Sidebar / Widget ---------- */
.widget{
  border:1px solid var(--color-line); border-radius:var(--radius);
  padding:20px; margin-bottom:22px; background:var(--color-paper);
}
.widget-title{
  font-size:15px; margin-bottom:14px; text-transform:uppercase; letter-spacing:.04em;
  color:var(--color-ink-soft); font-family:var(--font-body); font-weight:600;
}

/* Search form sidebar */
.sidebar-search{ margin-bottom:22px; }
.search-form{ position:relative; display:flex; }
.search-field{
  width:100%; padding:12px 46px 12px 16px; border:1px solid var(--color-line);
  border-radius:10px; font-family:var(--font-body); font-size:14.5px;
  background:var(--color-paper); color:var(--color-ink);
  transition:border-color .15s ease, box-shadow .15s ease;
}
.search-field:focus{ border-color:var(--color-accent); box-shadow:0 0 0 3px rgba(47,111,94,0.12); outline:none; }
.search-submit{
  position:absolute; right:4px; top:4px; bottom:4px; width:38px;
  display:flex; align-items:center; justify-content:center;
  background:var(--color-accent); border:none; border-radius:7px;
  color:#fff; cursor:pointer; transition:background .15s ease;
}
.search-submit:hover{ background:var(--color-accent-dark); }
.search-submit svg{ width:17px; height:17px; }

/* ---------- 9. Footer ---------- */
.site-footer{ background:var(--color-ink); color:#D7DED8; padding:24px 24px; }
.footer-widget-area{
  max-width:var(--container-width); margin:0 auto 24px;
  padding-bottom:24px; border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-widget-area .widget{ background:none; border:none; padding:0; color:#D7DED8; }
.footer-widget-area .widget-title{ color:#8FA096; }
.site-info{
  max-width:var(--container-width); margin:0 auto; display:flex; justify-content:space-between;
  align-items:center; font-size:13px; color:#8FA096; flex-wrap:wrap; gap:12px 24px;
}
.footer-menu ul{ display:flex; flex-wrap:wrap; gap:8px 20px; }
.footer-menu a{ color:#B8C4BA; }
.footer-menu a:hover{ color:#fff; }
.copyright{ white-space:nowrap; }

.entry-header{ max-width:760px; margin:0 auto 24px; }
.entry-title{ font-size:32px; margin:10px 0 16px; }
.entry-thumbnail{
  max-width:900px; margin:0 auto 30px; border-radius:var(--radius); overflow:hidden;
  aspect-ratio:16/10.5;
}
.entry-thumbnail img{ width:100%; height:100%; object-fit:cover; }
.entry-content{ max-width:760px; margin:0 auto; }
.entry-footer{ max-width:760px; margin:24px auto 0; }
.entry-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.tag-link{
  font-size:13px; padding:6px 12px; border:1px solid var(--color-line);
  border-radius:20px; color:var(--color-ink-soft);
}
.tag-link:hover{ border-color:var(--color-accent); color:var(--color-accent); }

/* ---------- Form Kontak ----------
   Dipakai oleh output shortcode [kode_kontak] (lihat inc/contact-embed.php)
   supaya form kontak dari SplitForms (atau embed pihak ketiga lain) ikut
   gaya visual tema — bukan style bawaan vendor. */
.contact-form-wrap{ max-width:760px; margin:32px auto 0; }
.form-notice{
  padding:14px 18px; border-radius:10px; font-size:14.5px; margin-bottom:20px;
}
.form-notice--success{ background:#E3F0EC; color:var(--color-accent-dark); border:1px solid #B9D9CF; }
.form-notice--error{ background:#FBEAE6; color:#A3402A; border:1px solid #F0C4B8; }
.contact-form-honeypot{
  position:absolute; left:-9999px; top:-9999px; width:1px; height:1px; overflow:hidden;
}
.form-row{ margin-bottom:18px; }
.form-row--split{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.form-field label{ display:block; font-size:13.5px; font-weight:600; color:var(--color-ink); margin-bottom:6px; }
.form-field .required{ color:#C25B2E; }
.form-field input[type="text"],
.form-field input[type="email"],
.form-field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--color-line); border-radius:10px;
  font-family:var(--font-body); font-size:15px; color:var(--color-ink); background:var(--color-paper);
  transition:border-color .15s ease, box-shadow .15s ease;
}
.form-field input:focus, .form-field textarea:focus{
  outline:none; border-color:var(--color-accent); box-shadow:0 0 0 3px rgba(47,111,94,0.12);
}
.form-field textarea{ resize:vertical; min-height:120px; }
.contact-form .btn-submit{
  background:var(--color-accent); color:#fff; border:none; padding:13px 28px;
  border-radius:10px; font-family:var(--font-body); font-weight:600; font-size:15px;
  cursor:pointer; transition:background .15s ease; width:100%;
}
.contact-form .btn-submit:hover{ background:var(--color-accent-dark); }
@media (min-width: 480px){
  .contact-form .btn-submit{ width:auto; }
}
@media (max-width: 560px){
  .form-row--split{ grid-template-columns:1fr; gap:0; }
}

/* ---------- Author Bio Box ---------- */
.author-bio{
  display:flex; gap:16px; align-items:flex-start;
  border:1px solid var(--color-line); border-radius:var(--radius);
  background:var(--color-paper-alt); padding:20px; margin:28px auto;
  max-width:760px;
}
.author-bio-avatar img{ border-radius:50%; width:56px; height:56px; }
.author-bio-label{ font-size:11.5px; text-transform:uppercase; letter-spacing:.06em; color:var(--color-ink-soft); font-weight:600; }
.author-bio-name{ font-size:16px; margin:2px 0 6px; }
.author-bio-desc{ font-size:14px; color:var(--color-ink-soft); margin:0; }

/* ---------- Navigasi Artikel (Prev/Next) ---------- */
.post-navigation{
  display:grid; grid-template-columns:1fr 1fr; gap:16px;
  margin:32px 0 8px;
}
.post-navigation a{
  display:flex; flex-direction:column; gap:6px;
  border:1px solid var(--color-line); border-radius:var(--radius);
  padding:16px 18px; height:100%;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.post-navigation a:hover{ border-color:var(--color-accent); box-shadow:0 4px 14px rgba(22,33,28,0.06); }
.nav-next{ text-align:right; }
.nav-next a{ align-items:flex-end; }
.nav-label{ font-size:12px; font-weight:600; letter-spacing:.04em; text-transform:uppercase; color:var(--color-accent); }
.nav-title{ font-size:14.5px; font-weight:500; color:var(--color-ink); line-height:1.4; }

/* ---------- Artikel Terkait ---------- */
.related-posts{ margin-top:48px; }

/* ---------- 404 ---------- */
.error-404{ text-align:center; padding:40px 0 8px; }
.error-404 .entry-title{ margin-bottom:12px; }
.error-404 p{ color:var(--color-ink-soft); max-width:52ch; margin:0 auto 24px; }
.error-404 .search-form{ max-width:420px; margin:0 auto 40px; }

/* ---------- Pagination ---------- */
.pagination{ margin-top:32px; display:flex; justify-content:center; }
.pagination .nav-links{ display:flex; flex-wrap:wrap; gap:8px; align-items:center; }
.pagination .page-numbers{
  display:inline-flex; align-items:center; justify-content:center;
  min-width:38px; height:38px; padding:0 12px;
  border:1px solid var(--color-line); border-radius:8px;
  font-size:14px; font-weight:500; color:var(--color-ink-soft);
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.pagination .page-numbers:hover{ border-color:var(--color-accent); color:var(--color-accent); }
.pagination .page-numbers.current{ background:var(--color-accent); border-color:var(--color-accent); color:#fff; }
.pagination .page-numbers.dots{ border:none; }

/* ---------- TOC (Daftar Isi otomatis) ----------
   Default COLLAPSED (class .is-collapsed dari server-side, sebelum JS
   jalan) — mencegah "flash" konten terbuka lalu tertutup mendadak saat JS
   baru load. Tombol toggle di assets/js/main.js yang menghapus/menambah
   class ini saat diklik. */
.toc{
  border:1px solid var(--color-line); border-radius:var(--radius);
  background:var(--color-paper-alt); margin:0 0 28px; overflow:hidden;
}
.toc-toggle{
  width:100%; display:flex; align-items:center; justify-content:space-between;
  gap:12px; padding:14px 18px; background:none; border:none; cursor:pointer;
  text-align:left; font-family:var(--font-body);
}
.toc-toggle .toc-title{
  font-family:var(--font-heading); font-weight:700; font-size:15px;
  text-transform:uppercase; letter-spacing:.04em; color:var(--color-ink);
  line-height:1;
}
.toc-chevron{ flex-shrink:0; color:var(--color-ink-soft); transition:transform .2s ease; }
.toc.is-collapsed .toc-chevron{ transform:rotate(-90deg); }
.toc-panel{
  display:grid; grid-template-rows:1fr; visibility:visible;
  transition:grid-template-rows .25s ease, visibility 0s linear 0s;
}
.toc.is-collapsed .toc-panel{
  grid-template-rows:0fr; visibility:hidden;
  transition:grid-template-rows .25s ease, visibility 0s linear .25s;
}
.toc-panel > .toc-list{ overflow:hidden; padding:0 18px 18px; }
.toc.is-collapsed .toc-panel > .toc-list{ padding-top:0; padding-bottom:0; }
.toc .toc-list{ list-style:none; padding-left:0; margin:0; }
.toc-list li{ margin-bottom:8px; font-size:14.5px; }
.toc-list a{ color:var(--color-accent); }
.toc-list a:hover{ text-decoration:underline; }
.toc-level-3{ margin-left:16px; padding-left:10px; border-left:2px solid var(--color-line); }
.toc-level-4, .toc-level-5, .toc-level-6{ margin-left:32px; padding-left:10px; border-left:2px solid var(--color-line); font-size:13.5px; }
@media (prefers-reduced-motion: reduce){
  .toc-panel, .toc-chevron{ transition:none; }
}

/* ---------- Social Share ---------- */
.social-share{
  display:flex; align-items:center; flex-wrap:wrap; gap:10px;
  margin:28px 0; padding-top:20px; border-top:1px solid var(--color-line);
}
.social-share-label{ font-size:13.5px; font-weight:600; color:var(--color-ink-soft); margin-right:2px; }
.share-btn{
  display:flex; align-items:center; justify-content:center;
  width:38px; height:38px; border-radius:50%;
  border:1px solid var(--color-line); background:var(--color-paper);
  color:var(--color-ink-soft); cursor:pointer;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.share-btn:hover{ background:var(--color-accent); border-color:var(--color-accent); color:#fff; }
.share-btn.is-copied{ background:var(--color-accent); border-color:var(--color-accent); color:#fff; }

/* ---------- Aksesibilitas ---------- */
.screen-reader-text{
  position:absolute !important; width:1px; height:1px; overflow:hidden;
  clip:rect(1px,1px,1px,1px); white-space:nowrap;
}
.skip-link{
  position:absolute; left:-9999px; top:0; background:var(--color-ink); color:#fff;
  padding:12px 20px; z-index:999; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--color-accent); outline-offset:2px;
}
@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior:auto !important; transition:none !important; }
}

/* ---------- 12. Back to Top ----------
   Default agak transparan (opacity 55%) supaya tidak terlalu mencolok
   saat idle, jadi full opaque saat hover (mouse), focus keyboard, atau
   disentuh/tap (class .is-active ditambahkan lewat JS di main.js, karena
   :hover tidak natural berlaku di layar sentuh). Visibility & transform
   dipakai bareng opacity supaya tombol benar-benar tidak bisa di-tab/klik
   saat tersembunyi (bukan cuma opacity:0 doang). */
.back-to-top{
  --btt-offset:20px;
  --btt-size:44px;
  position:fixed;
  right:var(--btt-offset);
  bottom:calc(var(--btt-offset) + env(safe-area-inset-bottom, 0px));
  width:var(--btt-size);
  height:var(--btt-size);
  border-radius:50%;
  border:1px solid var(--color-line);
  background:var(--color-accent);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  z-index:50;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transform:translateY(12px);
  box-shadow:0 4px 14px rgba(22,33,28,0.16);
  transition:opacity .25s ease, transform .25s ease, background .15s ease, visibility 0s linear .25s;
}
.back-to-top.is-visible{
  opacity:.55;
  visibility:visible;
  pointer-events:auto;
  transform:translateY(0);
  transition:opacity .25s ease, transform .25s ease, background .15s ease, visibility 0s linear 0s;
}
.back-to-top.is-visible:hover,
.back-to-top.is-visible:focus-visible,
.back-to-top.is-visible.is-active{
  opacity:1;
}
.back-to-top:focus-visible{
  outline:2px solid var(--color-accent-dark);
  outline-offset:3px;
}
.back-to-top svg{ pointer-events:none; }
@media (max-width:560px){
  .back-to-top{ --btt-offset:14px; --btt-size:40px; }
}
@media (prefers-reduced-motion: reduce){
  .back-to-top{ transition:opacity .15s linear, visibility 0s linear; transform:none; }
}

/* ---------- 13. Responsive ---------- */
@media (max-width: 860px){
  .hero-inner{ grid-template-columns:1fr; }
  .site-content-layout{ grid-template-columns:1fr; }
  .site-info{ flex-direction:column; align-items:flex-start; }
  .menu-toggle{ display:block; }
  .main-navigation{ display:none; width:100%; }
  .main-navigation.is-open{ display:block; }
  .main-navigation ul{ flex-direction:column; gap:4px; padding:12px 0; }
  .post-navigation{ grid-template-columns:1fr; }
  .nav-next{ text-align:left; }
  .nav-next a{ align-items:flex-start; }
}
@media (max-width: 560px){
  .card-grid{ grid-template-columns:1fr; }
}
@media (max-width: 480px){
  .hero h1{ font-size:28px; }
}