/* =========================================================
   IQN News — Main Stylesheet
   Brand: International Quantum News
   ========================================================= */

:root {
  --iqn-bg: #FFFFFF;
  --iqn-text: #1A1A1A;
  --iqn-navy: #0B1D33;
  --iqn-accent: #00B4D8;
  --iqn-violet: #6C63FF;
  --iqn-gray-50: #F7F8FA;
  --iqn-gray-100: #EEF0F3;
  --iqn-gray-300: #D7DCE2;
  --iqn-gray-500: #6B7280;
  --iqn-gray-700: #3A4149;
  --iqn-border: #E2E5E9;
  --iqn-maxw: 1200px;
  --iqn-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --iqn-font-serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--iqn-bg);
  color: var(--iqn-text);
  font-family: var(--iqn-font-sans);
  line-height: 1.5;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  max-width: var(--iqn-maxw);
  margin: 0 auto;
  padding: 0 20px;
}
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--iqn-accent);
  color: #fff;
  padding: 10px 16px;
  z-index: 10000;
}
.skip-link:focus { left: 10px; top: 10px; }

/* ---------- Breaking News Banner ---------- */
.iqn-breaking-banner {
  background: var(--iqn-navy);
  color: #fff;
  font-size: 14px;
  border-bottom: 3px solid var(--iqn-accent);
}
.iqn-breaking-banner .container {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.iqn-breaking-label {
  background: var(--iqn-accent);
  color: var(--iqn-navy);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: .04em;
  padding: 3px 8px;
  border-radius: 3px;
  flex: none;
}
.iqn-breaking-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.iqn-breaking-text a { color: #fff; }
.iqn-breaking-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
  opacity: .7;
}
.iqn-breaking-close:hover { opacity: 1; }

/* ---------- Header ---------- */
.iqn-header {
  background: var(--iqn-navy);
  position: sticky;
  top: 0;
  z-index: 500;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.iqn-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 10px;
}
.iqn-logo-wrap { display: flex; align-items: center; gap: 12px; }
.iqn-logo img { height: 34px; width: auto; display: block; }
.iqn-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.iqn-tagline {
  color: #A9B4C4;
  font-size: 11px;
  letter-spacing: .02em;
  margin-top: 2px;
  display: none;
}
@media (min-width: 640px) {
  .iqn-tagline { display: block; }
}
.iqn-header-actions { display: flex; align-items: center; gap: 14px; }
.iqn-search-toggle, .iqn-menu-toggle {
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 6px;
  font-size: 18px;
  display: flex;
}
.iqn-menu-toggle { display: none; }

.iqn-nav {
  border-top: 1px solid rgba(255,255,255,.08);
}
.iqn-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}
.iqn-nav a {
  display: block;
  color: #E7EAEF;
  font-size: 13.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: 11px 12px;
}
.iqn-nav a:hover,
.iqn-nav .current-menu-item > a {
  color: #fff;
  text-decoration: none;
  box-shadow: inset 0 -3px 0 var(--iqn-accent);
}

.iqn-search-bar {
  display: none;
  background: #0E2340;
  padding: 12px 0;
}
.iqn-search-bar.is-open { display: block; }
.iqn-search-bar form { display: flex; }
.iqn-search-bar input[type="search"] {
  flex: 1;
  padding: 10px 12px;
  border: none;
  border-radius: 3px 0 0 3px;
  font-size: 15px;
}
.iqn-search-bar button {
  background: var(--iqn-accent);
  color: var(--iqn-navy);
  border: none;
  padding: 0 18px;
  font-weight: 700;
  border-radius: 0 3px 3px 0;
  cursor: pointer;
}

@media (max-width: 860px) {
  .iqn-menu-toggle { display: flex; }
  .iqn-nav { display: none; }
  .iqn-nav.is-open { display: block; }
  .iqn-nav ul { flex-direction: column; }
  .iqn-nav a { padding: 12px 4px; border-bottom: 1px solid rgba(255,255,255,.06); }
}

/* ---------- Ad slots ---------- */
.iqn-ad {
  margin: 24px auto;
  text-align: center;
}
.iqn-ad-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--iqn-gray-500);
  margin-bottom: 6px;
}
.iqn-ad-slot {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--iqn-gray-50);
  border: 1px dashed var(--iqn-gray-300);
  color: var(--iqn-gray-500);
  font-size: 12px;
}

/* ---------- Category / Kicker labels ---------- */
.iqn-kicker {
  display: inline-block;
  color: var(--iqn-accent);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.iqn-kicker a { color: inherit; }

/* ---------- Homepage layout ---------- */
.iqn-main { padding: 28px 0 40px; }

.iqn-lead {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 28px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--iqn-border);
  margin-bottom: 32px;
}
.iqn-lead-story .iqn-lead-img { border-radius: 4px; overflow: hidden; margin-bottom: 14px; }
.iqn-lead-story h1, .iqn-lead-story h2 {
  font-size: 32px;
  line-height: 1.15;
  margin: 0 0 10px;
  font-weight: 800;
}
.iqn-lead-story p.excerpt {
  font-size: 17px;
  color: var(--iqn-gray-700);
  margin: 0;
}
.iqn-lead-secondary { display: flex; flex-direction: column; gap: 18px; }
.iqn-lead-secondary-item { display: flex; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--iqn-border); }
.iqn-lead-secondary-item:last-child { border-bottom: none; padding-bottom: 0; }
.iqn-lead-secondary-item img { width: 96px; height: 72px; object-fit: cover; border-radius: 3px; flex: none; }
.iqn-lead-secondary-item h3 { font-size: 15px; line-height: 1.3; margin: 0; font-weight: 700; }

.iqn-section-title {
  font-size: 20px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .02em;
  border-bottom: 3px solid var(--iqn-navy);
  padding-bottom: 8px;
  margin: 0 0 20px;
}

.iqn-layout {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 36px;
}

.iqn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-bottom: 36px;
}
.iqn-card img { border-radius: 4px; margin-bottom: 10px; aspect-ratio: 16/10; object-fit: cover; }
.iqn-card h3 { font-size: 17px; line-height: 1.3; margin: 0 0 6px; font-weight: 700; }
.iqn-card p.excerpt { font-size: 14px; color: var(--iqn-gray-700); margin: 0; }
.iqn-card .iqn-meta { font-size: 12px; color: var(--iqn-gray-500); margin-top: 6px; }

/* Sidebar: Trending */
.iqn-sidebar-module {
  background: var(--iqn-gray-50);
  border: 1px solid var(--iqn-border);
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 26px;
}
.iqn-sidebar-module h2 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: .03em;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--iqn-navy);
}
.iqn-trending-list { list-style: none; margin: 0; padding: 0; counter-reset: trending; }
.iqn-trending-list li {
  counter-increment: trending;
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--iqn-border);
}
.iqn-trending-list li:last-child { border-bottom: none; }
.iqn-trending-list li::before {
  content: counter(trending);
  font-size: 22px;
  font-weight: 800;
  color: var(--iqn-accent);
  font-family: var(--iqn-font-serif);
  flex: none;
  width: 24px;
}
.iqn-trending-list h4 { font-size: 14px; margin: 0; font-weight: 700; line-height: 1.35; }

/* ---------- Article page ---------- */
.iqn-article-header { max-width: 780px; margin: 0 auto 24px; }
.iqn-article-header h1 {
  font-size: 34px;
  line-height: 1.18;
  font-weight: 800;
  margin: 8px 0 14px;
}
.iqn-standfirst { font-size: 18px; color: var(--iqn-gray-700); margin: 0 0 16px; }
.iqn-byline-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--iqn-gray-500);
  border-top: 1px solid var(--iqn-border);
  border-bottom: 1px solid var(--iqn-border);
  padding: 12px 0;
}
.iqn-byline-row .iqn-author-name { color: var(--iqn-text); font-weight: 700; }
.iqn-byline-row .iqn-author-name a { color: inherit; }
.iqn-share-icons { display: flex; gap: 8px; margin-left: auto; }
.iqn-share-icons a {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--iqn-gray-100);
  color: var(--iqn-navy);
  font-size: 13px;
}
.iqn-share-icons a:hover { background: var(--iqn-accent); color: #fff; text-decoration: none; }

.iqn-featured-media { max-width: 900px; margin: 24px auto; }
.iqn-featured-media img { border-radius: 4px; width: 100%; }
.iqn-figcaption {
  font-size: 13px;
  color: var(--iqn-gray-500);
  margin-top: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--iqn-border);
}

.iqn-article-body {
  max-width: 780px;
  margin: 0 auto;
  font-size: 19px;
  line-height: 1.65;
  font-family: var(--iqn-font-serif);
}
.iqn-article-body p { margin: 0 0 22px; }
.iqn-article-body h2 { font-family: var(--iqn-font-sans); font-size: 24px; margin: 34px 0 16px; font-weight: 800; }
.iqn-article-body h3 { font-family: var(--iqn-font-sans); font-size: 20px; margin: 28px 0 14px; font-weight: 700; }
.iqn-article-body img { border-radius: 4px; margin: 24px 0; }
.iqn-article-body blockquote {
  font-family: var(--iqn-font-sans);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--iqn-navy);
  border-left: 4px solid var(--iqn-accent);
  margin: 32px 0;
  padding: 4px 0 4px 22px;
}
.iqn-article-body a { color: var(--iqn-accent); text-decoration: underline; }
.iqn-article-body iframe, .iqn-article-body video, .iqn-article-body audio { width: 100%; margin: 24px 0; }
.iqn-article-body ul, .iqn-article-body ol { margin: 0 0 22px; padding-left: 24px; }

.iqn-tags { max-width: 780px; margin: 30px auto 0; display: flex; flex-wrap: wrap; gap: 8px; }
.iqn-tags a {
  background: var(--iqn-gray-100);
  color: var(--iqn-gray-700);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 14px;
}
.iqn-tags a:hover { background: var(--iqn-accent); color: #fff; text-decoration: none; }

.iqn-author-box {
  max-width: 780px;
  margin: 34px auto;
  display: flex;
  gap: 16px;
  background: var(--iqn-gray-50);
  border: 1px solid var(--iqn-border);
  border-radius: 6px;
  padding: 20px;
}
.iqn-author-box img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; flex: none; }
.iqn-author-box h4 { margin: 0 0 4px; font-size: 15px; }
.iqn-author-box p { margin: 0; font-size: 14px; color: var(--iqn-gray-700); }
.iqn-author-box a.iqn-author-link { color: var(--iqn-accent); font-size: 13px; }

.iqn-related {
  max-width: 900px;
  margin: 40px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--iqn-border);
}
.iqn-related .iqn-grid { grid-template-columns: repeat(3, 1fr); margin-bottom: 0; }

.iqn-comments { max-width: 780px; margin: 40px auto 0; }

/* ---------- Archive / category pages ---------- */
.iqn-archive-header { margin-bottom: 28px; }
.iqn-archive-header h1 { font-size: 28px; font-weight: 800; margin: 0 0 6px; }
.iqn-archive-header p { color: var(--iqn-gray-500); margin: 0; }
.iqn-list-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--iqn-border);
}
.iqn-list-item img { border-radius: 4px; aspect-ratio: 16/10; object-fit: cover; }
.iqn-list-item h2 { font-size: 20px; margin: 0 0 8px; font-weight: 700; }
.iqn-list-item p.excerpt { color: var(--iqn-gray-700); margin: 0 0 8px; font-size: 15px; }

/* ---------- Video / Audio archive cards ---------- */
.iqn-media-card { position: relative; }
.iqn-media-card .iqn-play-icon {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 46px; height: 46px;
  background: rgba(11,29,51,.8);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 16px;
}
.iqn-audio-card .iqn-play-icon { background: var(--iqn-violet); }

/* ---------- Pagination ---------- */
.iqn-pagination { display: flex; gap: 8px; justify-content: center; margin: 30px 0; }
.iqn-pagination a, .iqn-pagination span {
  padding: 8px 14px;
  border: 1px solid var(--iqn-border);
  border-radius: 4px;
  font-size: 14px;
}
.iqn-pagination .current { background: var(--iqn-navy); color: #fff; border-color: var(--iqn-navy); }

/* ---------- Footer ---------- */
.iqn-footer {
  background: var(--iqn-navy);
  color: #C9D1DC;
  margin-top: 50px;
  padding: 40px 0 20px;
}
.iqn-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.iqn-footer-grid h4 {
  color: #fff;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin: 0 0 14px;
}
.iqn-footer-grid ul { list-style: none; margin: 0; padding: 0; }
.iqn-footer-grid li { margin-bottom: 8px; }
.iqn-footer-grid a { color: #C9D1DC; font-size: 14px; }
.iqn-footer-grid a:hover { color: var(--iqn-accent); }
.iqn-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  font-size: 13px;
  color: #8C97A6;
}
.iqn-footer-logo { height: 26px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .iqn-layout { grid-template-columns: 1fr; }
  .iqn-lead { grid-template-columns: 1fr; }
  .iqn-grid { grid-template-columns: repeat(2, 1fr); }
  .iqn-related .iqn-grid { grid-template-columns: repeat(2, 1fr); }
  .iqn-footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .iqn-grid { grid-template-columns: 1fr; }
  .iqn-related .iqn-grid { grid-template-columns: 1fr; }
  .iqn-list-item { grid-template-columns: 1fr; }
  .iqn-article-header h1 { font-size: 26px; }
  .iqn-article-body { font-size: 17px; }
  .iqn-footer-grid { grid-template-columns: 1fr 1fr; }
  .iqn-lead-story h1, .iqn-lead-story h2 { font-size: 24px; }
}