/* sonoelements.com archive – layout modelled on the site's 2018–2020 Blogger theme. New code. */

@font-face { font-family: 'Roboto'; font-style: normal; font-weight: 100 900; font-display: swap; src: url('/assets/fonts/roboto-var.woff2') format('woff2'); }
@font-face { font-family: 'Lora'; font-style: normal; font-weight: 400 700; font-display: swap; src: url('/assets/fonts/lora-var.woff2') format('woff2'); }
@font-face { font-family: 'Open Sans'; font-style: normal; font-weight: 300 800; font-display: swap; src: url('/assets/fonts/open-sans-var.woff2') format('woff2'); }

:root {
  --mint: #4bdaa8;
  --mint-dark: #178060; /* AA-contrast variant for small text on white */
  --ink: #233335;
  --text: #6b6b6b; /* original #777, darkened slightly for WCAG AA */
  --muted: #707070;
  --line: #e5e5e5;
  --beige: #f6f0ec;
  --card-w: 1170px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 400 13px/1.5 'Open Sans', Arial, sans-serif;
  color: #333;
  background: #ebe6e1;
}
/* Landscape on its own fixed layer: rasterised once, not repainted with the page */
body::before {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: url('/assets/img/bg-landscape.svg') center top / cover no-repeat;
  will-change: transform;
}
.page-wash {
  min-height: 100vh;
  background: linear-gradient(to bottom, rgba(246, 240, 236, .5) 0%, var(--beige) 100%);
}
a { color: #000; text-decoration: none; }
a:hover, a:focus-visible { color: var(--mint-dark); }
:focus-visible { outline: 2px solid var(--mint-dark); outline-offset: 2px; }
img, svg { max-width: 100%; height: auto; }
.skip-link { position: absolute; left: -9999px; top: 8px; background: #fff; padding: 8px 14px; border-radius: 20px; z-index: 1000; }
.skip-link:focus { left: 12px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Header ---------- */
.site-header { max-width: var(--card-w); margin: 0 auto; padding: 48px 23px 0; position: relative; min-height: 204px; }
.header-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 14px; color: var(--ink); justify-self: center; text-align: left; }
.logo:hover { color: var(--ink); }
.logo svg { width: 54px; height: 54px; flex: none; }
.logo-text { display: block; font: 700 34px/1 'Roboto', Arial, sans-serif; letter-spacing: .5px; }
.logo-sub { display: block; font: 600 11px/1.4 'Open Sans', Arial, sans-serif; letter-spacing: 1.2px; text-transform: uppercase; color: #555; margin-top: 6px; }

.menu { position: relative; justify-self: start; }
.menu-btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  background: #fff; border: 0; border-radius: 50px; padding: 12px 20px;
  font: 700 12px/1 'Open Sans', Arial, sans-serif; color: #000; letter-spacing: .3px;
}
.menu-btn .bars { width: 14px; height: 10px; position: relative; border-top: 2px solid #000; border-bottom: 2px solid #000; }
.menu-btn .bars::after { content: ''; position: absolute; left: 0; right: 0; top: 2px; border-top: 2px solid #000; }
.menu-list {
  position: absolute; top: calc(100% + 8px); left: 0; z-index: 50; min-width: 180px;
  list-style: none; margin: 0; padding: 10px 0; background: #fff; border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .08);
}
.menu-list[hidden] { display: none; }
.menu-list a { display: block; padding: 9px 26px; font: 400 14px/1.3 'Roboto', Arial, sans-serif; color: #000; }
.menu-list a:hover, .menu-list a[aria-current="page"] { color: var(--mint-dark); }

.search { justify-self: end; position: relative; display: flex; align-items: center; }
.search-toggle {
  width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--mint); background: rgba(255, 255, 255, .55);
  cursor: pointer; display: grid; place-items: center; padding: 0;
}
.search-toggle svg { width: 15px; height: 15px; }
.search-form { position: absolute; right: 48px; top: 50%; transform: translateY(-50%); }
.search-form[hidden] { display: none; }
.search-form input {
  width: 230px; border: 0; border-radius: 20px; padding: 11px 16px; font: 400 13px 'Open Sans', Arial, sans-serif;
  background: #fff; box-shadow: 0 6px 20px rgba(0, 0, 0, .08);
}

.archive-notice {
  max-width: 900px; margin: 26px auto 0; text-align: center; font: 400 12px/1.5 'Open Sans', Arial, sans-serif; color: #444;
  background: rgba(255, 255, 255, .72); border-radius: 20px; padding: 7px 18px;
}
.archive-notice a { color: #000; text-decoration: underline; }

/* ---------- Card ---------- */
main { display: block; }
.card { max-width: var(--card-w); margin: 0 auto; background: #fff; padding: 40px 40px 60px; }
.breadcrumbs { font: 400 12px/1.4 'Roboto', Arial, sans-serif; color: var(--muted); margin: 0 0 22px; }
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumbs li + li::before { content: '›'; margin-right: 6px; color: #bbb; }
.breadcrumbs a { color: var(--muted); }

.post-label {
  display: inline-block; font: 700 11px/1 'Roboto', Arial, sans-serif; letter-spacing: 1.3px; text-transform: uppercase;
  color: var(--mint-dark); margin-bottom: 14px;
}
.post-label:hover { color: var(--ink); }
.post-title { margin: 0 0 14px; font: 700 25px/1.2 'Roboto', Arial, sans-serif; letter-spacing: 1px; color: var(--ink); }
.post-meta { font: 400 12px/1.6 'Roboto', Arial, sans-serif; color: var(--muted); margin: 0 0 28px; }
.post-meta span + span::before { content: '·'; margin: 0 8px; color: #bbb; }

.post-body { font: 400 15px/1.86 'Roboto', Arial, sans-serif; color: var(--text); text-align: justify; }
.post-body h2 { margin: 42px 0 12px; font: 700 18px/1.3 'Roboto', Arial, sans-serif; color: var(--text); text-decoration: underline; text-underline-offset: 4px; text-align: left; }
.post-body h3 { margin: 26px 0 8px; font: 700 15px/1.3 'Roboto', Arial, sans-serif; color: #555; text-align: left; }
.post-body p { margin: 0 0 16px; }
.post-body ul { margin: 0 0 16px; padding-left: 38px; }
.post-body li { margin: 4px 0; text-align: left; line-height: 1.6; }
.post-body a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--mint); text-underline-offset: 3px; }
.post-body a:hover { color: var(--mint-dark); }
.post-body strong { color: #4a4a4a; }
.post-body code { font-size: 13px; background: #f4f4f4; padding: 1px 5px; border-radius: 3px; }
.post-body figure { margin: 0 0 30px; text-align: center; }
.post-body figure img { display: block; margin: 0 auto; border-radius: 4px; }
.post-body figcaption { font-size: 12px; line-height: 1.5; color: var(--muted); margin-top: 8px; text-align: center; }
.hero img { width: 640px; aspect-ratio: 16 / 9; }
.schematic img { width: 860px; }

.facts { width: 100%; max-width: 760px; margin: 0 auto 10px; border-collapse: collapse; font-size: 14px; line-height: 1.5; text-align: left; }
.facts th, .facts td { border-bottom: 1px solid var(--line); padding: 8px 10px; vertical-align: top; }
.facts th { width: 38%; color: #555; font-weight: 500; background: #fafafa; }
.table-wrap { overflow-x: auto; margin: 0 0 16px; }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.5; text-align: left; }
.table-wrap th, .table-wrap td { border: 1px solid var(--line); padding: 7px 10px; }
.table-wrap thead th { background: #f0f0f0; color: #444; }

.note-box { background: #f3fbf8; border-left: 4px solid var(--mint); padding: 12px 16px; text-align: left; border-radius: 0 4px 4px 0; }
.page-note { font-size: 13px; line-height: 1.6; color: #666; background: #fafafa; border: 1px solid var(--line); border-radius: 4px; padding: 10px 14px; text-align: left; }

.price { text-align: center; font-size: 15px; margin: 4px 0 14px; }

/* Click-to-load audio player */
.demo { border: 1px solid var(--line); border-radius: 8px; padding: 18px; text-align: left; background: #fcfcfc; }
.demo-title { font-weight: 700; color: #4a4a4a; margin: 0 0 6px; }
.demo-btn {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer; margin: 10px 0 8px;
  background: var(--ink); color: #fff; border: 0; border-radius: 30px; padding: 11px 20px; font: 700 13px 'Open Sans', Arial, sans-serif;
}
.demo-btn:hover { background: #111; }
.demo-btn svg { width: 12px; height: 12px; fill: var(--mint); }
.demo small { display: block; font-size: 12px; line-height: 1.5; color: var(--muted); }
.demo iframe { width: 100%; border: 0; border-radius: 6px; margin-top: 10px; }

.sources { font-size: 13px; }
.sources li { line-height: 1.5; margin: 8px 0; }

/* Share + related */
.share { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin: 46px 0 0; padding: 0; list-style: none; }
.share a {
  display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid #e0e0e0; border-radius: 3px;
  font: 700 12px/1 'Roboto', Arial, sans-serif; color: #222; background: #fff;
}
.share a:hover { border-color: var(--mint); color: var(--mint-dark); }

.related { margin-top: 56px; }
.related h2 { text-align: center; font: 700 12px/1 'Roboto', Arial, sans-serif; letter-spacing: 1.5px; text-transform: uppercase; color: #333; margin: 0 0 30px; }
.related ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.related img { display: block; width: 100%; aspect-ratio: 250 / 140; object-fit: cover; border-radius: 4px; transition: opacity .3s; }
.related a:hover img { opacity: .8; }
.related .rel-title { display: block; margin-top: 12px; font: 700 13px/1.3 'Roboto', Arial, sans-serif; letter-spacing: .5px; color: #000; }

/* ---------- Index (home / label / archive) ---------- */
.index-intro { border-bottom: 1px solid var(--line); padding-bottom: 26px; margin-bottom: 34px; }
.index-intro h1 { margin: 0 0 10px; font: 600 30px/1.25 'Lora', Georgia, serif; color: var(--ink); letter-spacing: .3px; }
.index-intro p { margin: 0; font: 400 15px/1.75 'Roboto', Arial, sans-serif; color: var(--text); max-width: 820px; }
.status-msg { background: #f7f7f7; border: 1px solid var(--line); border-radius: 4px; padding: 12px 16px; margin: 0 0 30px; font: 400 14px/1.5 'Roboto', Arial, sans-serif; color: #555; }
.status-msg a { text-decoration: underline; }

/* Cards: the original theme's grid (31% columns, 3% gaps) with the label and title over a dark fade */
.post-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 34px 3%; }
.card-media { position: relative; overflow: hidden; background: #ece6df; }
.card-thumb { display: block; line-height: 0; }
.card-thumb img { display: block; width: 100%; height: auto; aspect-ratio: 1 / 1; object-fit: cover; transition: transform .4s ease; }
.card-media:hover img { transform: scale(1.05); }
.card-over {
  position: absolute; left: 0; right: 0; bottom: 5%; padding: 44px 20px 14px; pointer-events: none;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, .38) 40%, rgba(0, 0, 0, .78) 100%);
}
.card-over a { pointer-events: auto; }
.card-label { display: inline-block; padding: 4px 0; font: 600 11px/1.2 'Roboto', Arial, sans-serif; letter-spacing: 1px; text-transform: uppercase; color: var(--mint); text-shadow: 0 0 8px #000; }
.card-title { margin: 8px 0 0; font: 500 19px/1.2 'Roboto', Arial, sans-serif; }
.card-title a { color: #fff; }
.card-title a:hover { color: var(--mint); }
.card-desc { margin: 14px 0 0; font: 400 14px/1.7 'Roboto', Arial, sans-serif; color: var(--text); }

/* Month archives: plain title list, as on the original */
.archive-list { list-style: none; margin: 0; padding: 0; }
.archive-list li { padding: 0 0 22px; margin: 0 0 22px; border-bottom: 1px solid var(--line); }
.archive-list li:last-child { border-bottom: 0; margin-bottom: 0; }
.archive-title { margin: 0 0 8px; font: 700 25px/1.2 'Roboto', Arial, sans-serif; letter-spacing: 1px; }
.archive-title a { color: #233335; }
.archive-title a:hover { color: var(--mint-dark); }
.archive-date { margin: 0; font: 400 12px/1.4 'Roboto', Arial, sans-serif; color: var(--muted); }

.blog-pager { text-align: center; margin: 46px 0 0; font: 400 13px 'Roboto', Arial, sans-serif; }
.blog-pager a { color: #222; border-bottom: 1px solid #000; padding: 6px 2px; }
.feed-links { text-align: center; margin-top: 36px; font-size: 12px; color: var(--muted); }
.feed-links a { color: #555; text-decoration: underline; }

.archive-widget { margin-top: 50px; padding-top: 30px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.archive-widget h2 { font: 600 13px/1.5 'Roboto', Arial, sans-serif; letter-spacing: 1px; text-transform: uppercase; color: #333; margin: 0 0 10px; }
.archive-widget ul { list-style: none; margin: 0; padding: 0; font: 400 14px/2 'Roboto', Arial, sans-serif; }
.archive-widget .count { color: var(--muted); }

/* Search page */
.search-page form { display: flex; gap: 10px; margin: 0 0 28px; }
.search-page input { flex: 1; border: 1px solid #ddd; border-radius: 24px; padding: 12px 18px; font: 400 15px 'Roboto', Arial, sans-serif; }
.search-page button { border: 0; border-radius: 24px; background: var(--ink); color: #fff; padding: 0 22px; font: 700 13px 'Open Sans', Arial, sans-serif; cursor: pointer; }
.search-results { list-style: none; padding: 0; margin: 0; }
.search-results li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.search-results a { font: 700 17px 'Roboto', Arial, sans-serif; color: var(--ink); }
.search-results p { margin: 4px 0 0; font: 400 14px/1.6 'Roboto', Arial, sans-serif; color: var(--text); }

/* Off-screen blocks are laid out only when scrolled near (keeps first layout cheap) */
.sec, .share-nav, .related, .archive-widget, .site-footer { content-visibility: auto; contain-intrinsic-size: auto 480px; }

/* ---------- Footer ---------- */
.site-footer { padding: 90px 20px 40px; text-align: center; font: 400 12px/1.8 'Open Sans', Arial, sans-serif; color: #666; }
.site-footer a { color: #222; }
.site-footer nav { margin-bottom: 8px; }
.site-footer nav a { display: inline-block; margin: 0 4px; padding: 8px 6px; }
.to-top {
  position: fixed; right: 22px; bottom: 22px; width: 40px; height: 40px; border-radius: 50%; background: var(--mint);
  display: grid; place-items: center; color: #fff; box-shadow: 0 4px 14px rgba(0, 0, 0, .12); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .3s, visibility .3s;
}
.to-top.show { opacity: 1; visibility: visible; pointer-events: auto; }
.to-top svg { width: 16px; height: 16px; }

/* ---------- Responsive ---------- */
@media (max-width: 1210px) {
  .card { margin: 0 20px; }
}
@media (max-width: 767px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 4%; }
}
@media (max-width: 479px) {
  .post-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .site-header { padding: 20px 14px 0; min-height: 0; }
  .header-row { grid-template-columns: auto 1fr auto; }
  .logo { justify-self: center; gap: 10px; }
  .logo svg { width: 38px; height: 38px; }
  .logo-text { font-size: 20px; }
  .logo-sub { font-size: 9px; letter-spacing: .6px; }
  .menu-btn { padding: 10px 14px; }
  .menu-btn .label { display: none; }
  .search-form input { width: 180px; }
  .archive-notice { margin: 18px 10px 18px; border-radius: 12px; }
  .card { margin: 0; padding: 26px 18px 40px; }
  .post-title { font-size: 22px; }
  .post-body { text-align: left; font-size: 16px; line-height: 1.75; }
  .post-body ul { padding-left: 22px; }
  .index-intro h1 { font-size: 24px; }
  .related ul { grid-template-columns: 1fr; gap: 22px; }
  .archive-widget { grid-template-columns: 1fr; }
  .facts th { width: 44%; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}