/* Shared editorial layer. Kept separate from article content and publishing templates. */
@font-face {
  font-family: 'Manrope';
  src: url('../fonts/manrope-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/space-grotesk-latin.woff2') format('woff2');
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg-primary: #080c10;
  --bg-secondary: #10171d;
  --bg-card: #10171d;
  --text-primary: #f1f5f4;
  --text-secondary: #b4bfc3;
  --text-tertiary: #9da9ae;
  --accent-blue: #8be5e3;
  --accent-purple: #8be5e3;
  --accent-cyan: #8be5e3;
  --accent-green: #8be5c0;
  --page-line: rgba(206, 224, 231, .14);
}

html { scroll-padding-top: 110px; }
body.premium-page {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Manrope', sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
.premium-page ::selection { color: #080c10; background: #8be5e3; }
.premium-page :focus-visible { outline: 2px solid #8be5e3; outline-offset: 5px; }
.premium-page a { color: var(--accent-cyan); text-underline-offset: 4px; }
.premium-page button { font: inherit; }
.premium-page h1, .premium-page h2, .premium-page h3, .premium-page .logo {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text-primary);
  text-wrap: balance;
}
.premium-page .skip-link {
  position: fixed !important;
  top: 12px;
  left: 16px !important;
  z-index: 10001;
  padding: 12px 20px;
  border-radius: 8px;
  color: #080c10;
  background: #8be5e3;
  transform: translateY(-160%);
  transition: transform .18s ease;
}
.premium-page .skip-link:focus { top: 12px; transform: translateY(0); }

/* Navigation remains available without JavaScript. */
.premium-page .site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  padding: 0 40px;
  background: rgba(8, 12, 16, .92);
  border-bottom: 1px solid var(--page-line);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.premium-page .site-nav > .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 84px;
  max-width: 1280px;
  margin: 0 auto;
}
.premium-page .site-nav .logo { gap: 10px; font-size: 20px; font-weight: 600; letter-spacing: -.7px; color: #f1f5f4; }
.premium-page .site-nav .logo-icon,
.premium-page .site-nav .logo img { width: 34px; height: 34px; flex-shrink: 0; border-radius: 8px !important; }
.premium-page .site-nav .logo-icon img { display: block; }
.premium-page .site-nav .nav-links { display: flex; align-items: center; gap: 30px; margin: 0; padding: 0; list-style: none; }
.premium-page .site-nav .nav-links a { display: inline-flex; align-items: center; min-height: 44px; color: #9da9ae; font-size: 13px; font-weight: 500; text-decoration: none; transition: color .2s ease; }
.premium-page .site-nav .nav-links a:hover,
.premium-page .site-nav .nav-links a[aria-current='page'] { color: #f1f5f4; }
.premium-page .site-nav .nav-cta-btn,
.premium-page .cta-btn,
.premium-page .cta-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 20px;
  color: #080c10 !important;
  background: #edf5f3;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s ease, transform .2s ease;
}
.premium-page .site-nav .nav-cta-btn:hover,
.premium-page .cta-btn:hover,
.premium-page .cta-button:hover { background: #8be5e3; color: #080c10 !important; transform: translateY(-1px); opacity: 1; }
.premium-page .nav-toggle { display: none; }

/* A quiet, legible reading surface beneath the product navigation. */
.premium-page main.content,
.premium-page main.article-container {
  width: 100%;
  max-width: 860px;
  padding: 162px 36px 112px;
  margin: 0 auto;
  font-size: 17px;
  overflow-wrap: break-word;
}
.premium-page main h1,
.premium-page .page-header h1,
.premium-page .article-header h1 {
  font-size: clamp(36px, 4.8vw, 60px);
  line-height: 1.08;
  letter-spacing: -.05em;
  font-weight: 500;
  margin: 0 0 28px;
}
.premium-page .page-header { text-align: left; margin-bottom: 64px; padding-bottom: 44px; border-bottom: 1px solid var(--page-line); }
.premium-page .page-header p { max-width: 620px; margin: 0; font-size: 19px; line-height: 1.65; color: var(--text-secondary); }
.premium-page .page-header .updated { font-size: 13px; color: var(--text-tertiary); }
.premium-page main h2,
.premium-page .section h2 { margin: 48px 0 20px; padding: 0; border: 0; font-size: clamp(25px, 3vw, 32px); line-height: 1.25; letter-spacing: -.035em; font-weight: 500; }
.premium-page main h3,
.premium-page .section h3 { margin: 30px 0 12px; font-size: 21px; line-height: 1.35; letter-spacing: -.025em; font-weight: 500; }
.premium-page main p,
.premium-page .section p { color: var(--text-secondary); margin-bottom: 22px; font-size: inherit; }
.premium-page main strong { color: var(--text-primary); font-weight: 650; }
.premium-page main ul,
.premium-page main ol { padding-left: 24px; margin: 18px 0 28px; color: var(--text-secondary); }
.premium-page main li { margin-bottom: 10px; }
.premium-page .section { margin-bottom: 56px; }
.premium-page .breadcrumb,
.premium-page nav.breadcrumb {
  position: static;
  display: block;
  padding: 0;
  margin-bottom: 32px;
  background: none;
  border: 0;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  color: var(--text-tertiary);
  font-size: 12px;
  line-height: 1.7;
}
.premium-page .article-header { margin-bottom: 48px; }
.premium-page .article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 18px; margin-bottom: 22px; font-size: 12px; color: var(--text-tertiary); }
.premium-page .article-tag,
.premium-page .expertise-tag,
.premium-page .freshness-badge { display: inline-block; padding: 5px 10px; border-radius: 5px; border: 1px solid rgba(139, 229, 227, .18); background: rgba(139, 229, 227, .06); color: var(--accent-cyan); font-size: 11px; font-weight: 600; letter-spacing: .025em; }
.premium-page .article-author-byline { color: var(--text-tertiary) !important; font-size: 12px !important; line-height: 1.8; }
.premium-page .article-author-byline a { color: var(--text-primary) !important; }
.premium-page main > time { display: block; color: var(--text-tertiary); font-size: 12px; margin: -6px 0 32px; }
.premium-page main .article-intro,
.premium-page main .subtitle { font-size: 19px; line-height: 1.75; }
.premium-page main img,
.premium-page main video { max-width: 100%; }
.premium-page main figure { margin: 32px 0; }
.premium-page main figure img { display: block; height: auto; border-radius: 12px; }
.premium-page main figcaption { margin-top: 12px; color: var(--text-tertiary); font-size: 12px; }
.premium-page main pre { max-width: 100%; overflow-x: auto; padding: 24px; background: var(--bg-secondary); border: 1px solid var(--page-line); border-radius: 10px; }
.premium-page main blockquote { margin: 32px 0; padding: 8px 0 8px 24px; border-left: 2px solid var(--accent-cyan); color: var(--text-secondary); }
.premium-page .table-scroll { max-width: 100%; margin: 28px 0; overflow-x: auto; overscroll-behavior-x: contain; border: 1px solid var(--page-line); border-radius: 10px; }
.premium-page main table { width: 100%; border-collapse: collapse; font-size: 13px; line-height: 1.6; }
.premium-page .table-scroll table { min-width: 520px; margin: 0; }
.premium-page main th { color: var(--text-primary); background: var(--bg-secondary); font-weight: 600; text-align: left; }
.premium-page main th,
.premium-page main td { padding: 16px; border: 0; border-bottom: 1px solid var(--page-line); vertical-align: top; }
.premium-page main td { color: var(--text-secondary); }
.premium-page main tr:last-child td { border-bottom: 0; }

.premium-page .highlight-box,
.premium-page .key-takeaways,
.premium-page .intro-standalone,
.premium-page .checklist-box,
.premium-page .quick-tips {
  background: var(--bg-secondary);
  border: 1px solid var(--page-line);
  border-left: 2px solid var(--accent-cyan);
  border-radius: 0 10px 10px 0;
  padding: 28px;
  margin: 32px 0;
}
.premium-page .highlight-box h3,
.premium-page .quick-tips h2 { margin-top: 0; }
.premium-page .highlight-box p:last-child,
.premium-page .quick-tips ul { margin-bottom: 0; }
.premium-page .warning-box { background: rgba(224, 182, 114, .04); border-color: rgba(224, 182, 114, .2); border-radius: 10px; }
.premium-page .disclaimer,
.premium-page .disclaimer-box { background: transparent; border: 1px solid var(--page-line); border-radius: 10px; color: var(--text-tertiary); }
.premium-page .cta-box { background: radial-gradient(ellipse at top right, rgba(139,229,227,.08), transparent 65%), #10171d; border: 1px solid var(--page-line); border-radius: 14px; padding: 40px; margin: 56px 0; text-align: left; }
.premium-page .cta-box h3 { margin-top: 0; }
.premium-page .cta-box p { max-width: 600px; }
.premium-page .related-link { background: transparent; border: 0; border-bottom: 1px solid var(--page-line); border-radius: 0; padding: 20px 0; }
.premium-page .related-link:hover { background: transparent; border-color: var(--accent-cyan); color: var(--accent-cyan); }
.premium-page .indicator-card,
.premium-page .author-bio-box,
.premium-page .indicator-box { background: var(--bg-secondary); border-color: var(--page-line); box-shadow: none; }

/* About, author and support retain their distinct content structures. */
.page-about main.content { max-width: 1080px; }
.page-about .page-header { max-width: 100%; }
.page-about .page-header h1 { max-width: 800px; font-size: clamp(40px, 6vw, 76px); }
.page-about main > .section { max-width: 780px; }
.premium-page .mission-cards { gap: 32px; margin: 48px 0 72px; }
.premium-page .mission-card { background: transparent; border: 0; border-top: 1px solid var(--page-line); border-radius: 0; padding: 26px 0; }
.premium-page .mission-card h3 { margin: 16px 0 12px; }
.premium-page .mission-card p { font-size: 14px; }
.premium-page .mission-card-icon { font-size: 26px; }
.premium-page .values-list,
.premium-page .quick-tips ul,
.premium-page .publication-list { padding: 0; list-style: none; }
.premium-page .tech-item,
.premium-page .credential-card { background: var(--bg-secondary); border: 1px solid var(--page-line); border-radius: 10px; }
.premium-page .credential-card h3 { margin-top: 0; font-size: 17px; color: var(--accent-cyan); }
.premium-page .credential-card p { font-size: 13px; }
.premium-page .connect-link { border-radius: 8px; font-size: 13px; }
.premium-page .contact-section { background: transparent; border-top: 1px solid var(--page-line); border-radius: 0; padding: 40px 0 0; text-align: left; }
.premium-page .contact-card { text-align: left; padding: 32px; border: 1px solid var(--page-line); border-radius: 12px; background: var(--bg-secondary); }
.premium-page .contact-card:hover { transform: none; border-color: rgba(139,229,227,.35); }
.premium-page .contact-card .icon { width: 44px; height: 44px; margin: 0 0 24px; background: rgba(139,229,227,.09); color: var(--accent-cyan); border-radius: 10px; font-size: 23px; }
.premium-page .contact-card h3 { margin-top: 0; }
.premium-page .contact-card a { max-width: 100%; padding: 0; border: 0; border-radius: 0; font-size: 15px; overflow-wrap: anywhere; text-decoration: underline; }
.premium-page .contact-card a:hover { background: none; color: var(--text-primary); }
.page-support .faq-section h2 { text-align: left; }
.page-support .faq-item { background: transparent; border: 0; border-bottom: 1px solid var(--page-line); border-radius: 0; margin: 0; }
.page-support .faq-question { width: 100%; gap: 24px; padding: 24px 0; background: transparent; border: 0; color: var(--text-primary); text-align: left; font-size: 15px; line-height: 1.6; }
.page-support .faq-question:hover { color: var(--accent-cyan); background: transparent; }
.page-support .faq-question .arrow { font-size: 10px; }
.page-support .faq-answer { padding: 0 36px 28px 0; font-size: 14px; }

/* The journal index uses generous editorial rows, without a wall of cards. */
.page-blog-index main.content { max-width: 1120px; }
.page-blog-index main > h1 { margin-bottom: 56px; font-size: clamp(52px, 8vw, 92px); }
.page-blog-index main > ul { padding: 0 !important; margin: 0; }
.page-blog-index main > ul > li { margin: 0; padding: 0 !important; border-bottom: 1px solid var(--page-line) !important; }
.page-blog-index main > ul > li:first-child { border-top: 1px solid var(--page-line); }
.page-blog-index main > ul > li > a { position: relative; display: block; padding: 30px 60px 30px 0; color: var(--text-primary); text-decoration: none; transition: color .2s ease; }
.page-blog-index main > ul > li > a::after { position: absolute; right: 4px; top: 31px; content: '↗'; color: var(--text-tertiary); font-size: 23px; transition: transform .2s ease, color .2s ease; }
.page-blog-index main > ul > li > a:hover { color: var(--accent-cyan); }
.page-blog-index main > ul > li > a:hover::after { color: var(--accent-cyan); transform: translate(3px, -3px); }
.page-blog-index main > ul > li strong { display: block; color: inherit; font-family: 'Space Grotesk', sans-serif; font-size: clamp(19px, 2.5vw, 27px); line-height: 1.4; font-weight: 400; letter-spacing: -.025em; }
.page-blog-index main > ul > li br { display: none; }
.page-blog-index main > ul > li span { display: block; margin-top: 10px; color: var(--text-tertiary) !important; font-size: 12px !important; }

.premium-page footer { padding: 48px 24px 56px; background: var(--bg-primary); border-top: 1px solid var(--page-line); color: var(--text-tertiary); }
.premium-page footer p { margin: 0 0 12px; color: var(--text-tertiary); font-size: 12px; }
.premium-page footer a { display: inline-block; margin: 4px 12px; color: var(--text-tertiary); font-size: 12px; text-decoration: none; }
.premium-page footer a:hover { color: var(--accent-cyan); }
.premium-page .cookie-banner { background: rgba(16,23,29,.98); border-color: var(--page-line); padding: 20px 24px; }
.premium-page .cookie-banner-text { min-width: 0; font-size: 12px; }
.premium-page .cookie-btn-accept,
.premium-page .cookie-accept { background: #edf5f3; color: #080c10; }
.premium-page .cookie-btn-accept:hover,
.premium-page .cookie-accept:hover { background: #8be5e3; color: #080c10; }

@media (max-width: 760px) {
  .premium-page .site-nav { padding: 0 20px; }
  .premium-page .site-nav > .container { display: grid; grid-template-columns: 1fr auto; min-height: 76px; gap: 0; }
  .premium-page .site-nav .logo { min-height: 76px; font-size: 19px; }
  .premium-page .site-nav .nav-links { grid-column: 1 / -1; width: 100%; max-height: calc(100dvh - 76px); overflow-y: auto; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 0 22px; }
  .premium-page .site-nav .nav-links li { margin: 0; }
  .premium-page .site-nav .nav-links a { display: flex; min-height: 48px; font-size: 15px; }
  .premium-page .site-nav .nav-links .nav-cta-btn { margin-top: 12px; }
  .premium-page .site-nav.nav-enhanced .nav-links[hidden] { display: none; }
  .premium-page .site-nav:not(.nav-enhanced) { position: relative; }
  .premium-page .site-nav:not(.nav-enhanced) > .container { padding-top: 0; }
  .premium-page .nav-toggle:not([hidden]) { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; width: 44px; height: 44px; margin-left: auto; border: 1px solid var(--page-line); border-radius: 9px; color: #f1f5f4; background: transparent; cursor: pointer; }
  .premium-page .nav-toggle span { display: block; width: 17px; height: 1px; background: currentColor; transition: transform .2s ease; }
  .premium-page .nav-toggle[aria-expanded='true'] span:first-child { transform: translateY(3px) rotate(45deg); }
  .premium-page .nav-toggle[aria-expanded='true'] span:last-child { transform: translateY(-3px) rotate(-45deg); }
  .premium-page main.content,
  .premium-page main.article-container { padding: 126px 24px 76px; font-size: 16px; }
  .premium-page .site-nav:not(.nav-enhanced) + main { padding-top: 56px; }
  .premium-page main h1,
  .premium-page .page-header h1,
  .premium-page .article-header h1 { font-size: clamp(34px, 8.5vw, 52px); letter-spacing: -.045em; }
  .premium-page .page-header { margin-bottom: 40px; padding-bottom: 32px; }
  .premium-page .page-header p,
  .premium-page main .article-intro,
  .premium-page main .subtitle { font-size: 17px; }
  .premium-page .section { margin-bottom: 40px; }
  .premium-page .mission-cards,
  .premium-page .credential-grid { grid-template-columns: 1fr; gap: 14px; }
  .premium-page .mission-cards { margin: 32px 0 48px; }
  .premium-page .mission-card { padding: 22px 0 8px; }
  .premium-page .contact-card,
  .premium-page .highlight-box,
  .premium-page .quick-tips,
  .premium-page .cta-box { padding: 24px; }
  .premium-page .cookie-banner-inner { gap: 14px; }
  .premium-page .cookie-banner-text { flex-basis: 100%; }
  .premium-page .cookie-banner-buttons { width: 100%; }
  .premium-page .cookie-btn { min-height: 44px; }
  .page-blog-index main > h1 { font-size: 60px; margin-bottom: 36px; }
  .page-blog-index main > ul > li > a { padding: 24px 36px 24px 0; }
  .page-blog-index main > ul > li > a::after { top: 22px; font-size: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .premium-page *, .premium-page *::before, .premium-page *::after { animation: none !important; transition: none !important; }
}