/* SE-UA Net - lab atlas theme - self-contained */
:root {
  --ivory: #fff7e8;
  --navy: #10213f;
  --blue: #2457ff;
  --turq: #00b7c2;
  --coral: #ff6b57;
  --mint: #dff8ef;
  --lilac: #eee8ff;
  --ink: #172033;
  --paper: #ffffff;
  --rule: #d9d4c0;
  --shadow: 0 4px 18px -10px rgba(16,33,63,0.25);
  --r-card: 14px;
  --r-tile: 18px;
  --gutter: clamp(16px, 3vw, 28px);
  --maxw: 1180px;
  --maxw-read: 760px;
  --t-display: clamp(2.1rem, 4.4vw, 3.4rem);
  --t-h1: clamp(1.75rem, 3.4vw, 2.4rem);
  --t-h2: clamp(1.35rem, 2.4vw, 1.7rem);
  --t-h3: 1.15rem;
}

* { box-sizing: border-box; }
html { background: var(--ivory); color: var(--ink); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", system-ui, sans-serif;
  background:
    radial-gradient(ellipse at 8% -10%, var(--mint) 0%, transparent 40%),
    radial-gradient(ellipse at 92% 0%, var(--lilac) 0%, transparent 38%),
    var(--ivory);
  background-attachment: fixed;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

.visually-hidden, .skip-link {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link:focus { position: fixed; top: 8px; left: 8px; width: auto; height: auto; clip: auto; background: var(--navy); color: var(--paper); padding: 8px 12px; border-radius: 6px; z-index: 100; }

/* Header */
.atlas-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 247, 232, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.atlas-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
}
.atlas-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); }
.atlas-brand__mark { display: inline-flex; }
.atlas-brand__name { font-weight: 700; letter-spacing: -0.01em; }
.atlas-brand__sub { font-size: 0.78rem; color: #5a6a86; }
.atlas-nav ul { list-style: none; padding: 0; margin: 0; display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.atlas-nav a { color: var(--navy); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 0.95rem; }
.atlas-nav a:hover { background: var(--mint); }

.atlas-search { display: flex; align-items: center; gap: 4px; background: var(--paper); border: 1px solid var(--rule); border-radius: 999px; padding: 4px 4px 4px 12px; }
.atlas-search input { border: 0; outline: 0; background: transparent; min-width: 180px; font: inherit; color: var(--ink); }
.atlas-search button { border: 0; background: var(--navy); color: var(--paper); width: 32px; height: 32px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; }

@media (max-width: 900px) {
  .atlas-header__inner { grid-template-columns: auto 1fr; }
  .atlas-nav { order: 3; grid-column: 1 / -1; overflow-x: auto; }
  .atlas-search { order: 2; }
  .atlas-search input { min-width: 120px; }
}

/* Main */
.atlas-main { min-height: 60vh; }
.atlas-page { max-width: var(--maxw); margin: 0 auto; padding: var(--gutter); }
.atlas-page--subdomain { max-width: 920px; }

.atlas-hero { margin: 0 0 24px; border-radius: var(--r-tile); overflow: hidden; box-shadow: var(--shadow); }
.atlas-hero img { width: 100%; height: auto; }

.atlas-content { max-width: var(--maxw-read); }
.atlas-content h1 { font-size: var(--t-h1); line-height: 1.15; margin: 0 0 0.6em; color: var(--navy); letter-spacing: -0.015em; }
.atlas-content h2 { font-size: var(--t-h2); line-height: 1.2; margin: 1.8em 0 0.5em; color: var(--navy); }
.atlas-content h3 { font-size: var(--t-h3); margin: 1.4em 0 0.4em; color: var(--navy); }
.atlas-content p { margin: 0 0 1em; }
.atlas-content ul, .atlas-content ol { padding-left: 1.2em; margin: 0 0 1em; }
.atlas-content li + li { margin-top: 0.3em; }
.atlas-content blockquote { margin: 1.2em 0; padding: 0.6em 1em; border-left: 4px solid var(--turq); background: var(--mint); border-radius: 0 8px 8px 0; }
.atlas-content code { background: var(--lilac); padding: 1px 5px; border-radius: 4px; font-size: 0.92em; }
.atlas-content pre { background: var(--navy); color: var(--paper); padding: 14px 16px; border-radius: 10px; overflow-x: auto; }
.atlas-content table { width: 100%; border-collapse: collapse; margin: 1em 0; }
.atlas-content th, .atlas-content td { padding: 8px 10px; border-bottom: 1px solid var(--rule); text-align: left; font-size: 0.95rem; }

/* Lab-atlas homepage hero */
.lab-hero {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 64px) var(--gutter) clamp(20px, 4vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: center;
}
.lab-hero::before {
  content: "";
  position: absolute; inset: 24px 0;
  background-image:
    linear-gradient(to right, rgba(36,87,255,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36,87,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  border-radius: 24px;
  z-index: -1;
}
.lab-hero h1 { font-size: var(--t-display); line-height: 1.05; margin: 0 0 0.5em; color: var(--navy); letter-spacing: -0.02em; }
.lab-hero p.lead { font-size: 1.15rem; color: #2a3a58; margin: 0 0 1.4em; }
.lab-hero__cta { display: inline-flex; gap: 12px; align-items: center; background: var(--navy); color: var(--paper); padding: 12px 18px; border-radius: 999px; text-decoration: none; font-weight: 600; }
.lab-hero__cta:hover { background: var(--blue); }

.lab-stack { position: relative; aspect-ratio: 5 / 4; }
.lab-tile {
  position: absolute; padding: 16px 18px; border-radius: var(--r-tile);
  background: var(--paper); box-shadow: var(--shadow);
  border: 1px solid var(--rule); font-size: 0.95rem;
}
.lab-tile h3 { margin: 0 0 6px; font-size: 1rem; color: var(--navy); }
.lab-tile p { margin: 0; color: #51607a; font-size: 0.9rem; }
.lab-tile--a { left: 4%; top: 6%; width: 56%; transform: rotate(-2deg); background: var(--mint); }
.lab-tile--b { right: 4%; top: 24%; width: 50%; transform: rotate(2deg); background: var(--lilac); }
.lab-tile--c { left: 12%; bottom: 6%; width: 60%; transform: rotate(-1deg); background: var(--paper); }
.lab-tile--d { right: 8%; bottom: 18%; width: 30%; height: 80px; transform: rotate(3deg); background: var(--coral); color: var(--paper); }
.lab-tile--d h3 { color: var(--paper); }

@media (max-width: 800px) {
  .lab-hero { grid-template-columns: 1fr; }
  .lab-stack { display: none; }
}

/* Tile grid */
.tile-grid {
  max-width: var(--maxw);
  margin: clamp(20px, 3vw, 36px) auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.tile {
  background: var(--paper); border-radius: var(--r-card);
  padding: 18px 18px 16px; box-shadow: var(--shadow);
  border: 1px solid var(--rule);
  display: flex; flex-direction: column; gap: 10px;
}
.tile h3 { margin: 0; font-size: 1.05rem; color: var(--navy); }
.tile h3 a { color: inherit; text-decoration: none; }
.tile h3 a:hover { color: var(--blue); }
.tile p { margin: 0; color: #4b5876; font-size: 0.94rem; }
.tile .tile__topic { display: inline-block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; padding: 3px 8px; border-radius: 999px; background: var(--mint); color: #136a72; align-self: flex-start; }

.tile--accent-a { background: var(--mint); }
.tile--accent-b { background: var(--lilac); }
.tile--accent-c { background: #ffeede; }

/* Section heading */
.atlas-section { max-width: var(--maxw); margin: clamp(24px, 4vw, 48px) auto; padding: 0 var(--gutter); }
.atlas-section h2 { font-size: var(--t-h2); margin: 0 0 6px; color: var(--navy); }
.atlas-section .lead { margin: 0 0 16px; color: #4b5876; }

/* Subdomain page route map */
.atlas-route-map { margin: 0 0 16px; font-size: 0.85rem; color: #51607a; }
.atlas-route-map ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.atlas-route-map li + li::before { content: "/"; margin-right: 8px; color: #aab3c2; }
.atlas-route-map a { color: #51607a; }

/* Related */
.atlas-related { margin-top: 2em; padding-top: 1.4em; border-top: 1px solid var(--rule); }
.atlas-related h2 { font-size: 1.1rem; color: var(--navy); margin: 0 0 0.4em; }
.atlas-related ul { padding-left: 1.1em; margin: 0; }

/* Field note callout */
.atlas-fieldnote {
  margin: 1.6em 0;
  padding: 14px 16px;
  border-left: 4px solid var(--coral);
  background: #fff1ec;
  border-radius: 0 10px 10px 0;
}
.atlas-fieldnote strong { color: #aa3a26; }

/* ── Sidebar two-column layout ─────────────────────────────────────────────── */
.atlas-with-sidebar {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}
.atlas-with-sidebar .atlas-page,
.atlas-with-sidebar .atlas-page--subdomain {
  max-width: 100%;
  padding: 0;
}
.atlas-with-sidebar__aside {
  padding-top: var(--gutter);
  position: sticky;
  top: 80px;
}
@media (max-width: 860px) {
  .atlas-with-sidebar {
    grid-template-columns: 1fr;
  }
  .atlas-with-sidebar__aside {
    position: static;
  }
}

/* ── Newsletter signup card ─────────────────────────────────────────────────── */
.lab-subscribe--card {
  background: var(--navy);
  border-radius: var(--r-tile);
  padding: 22px 20px 20px;
  color: #cdd6e6;
}
.lab-subscribe__heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 8px;
}
.lab-subscribe__blurb {
  font-size: 0.9rem;
  margin: 0 0 16px;
  color: #a8b6cc;
  line-height: 1.5;
}
.lab-subscribe__form { display: flex; flex-direction: column; gap: 12px; }
.lab-subscribe__honey {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap;
  pointer-events: none;
}
.lab-subscribe__row { display: flex; flex-direction: column; gap: 4px; }
.lab-subscribe__label {
  font-size: 0.82rem;
  color: #a8b6cc;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.lab-subscribe__label span { color: var(--coral); margin-left: 2px; }
.lab-subscribe__input {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--paper);
  font: inherit;
  font-size: 0.95rem;
  width: 100%;
  transition: border-color 0.15s;
}
.lab-subscribe__input::placeholder { color: #6d7f9b; }
.lab-subscribe__input:focus {
  outline: 2px solid var(--turq);
  outline-offset: 1px;
  border-color: var(--turq);
  background: rgba(255,255,255,0.12);
}
.lab-subscribe__btn {
  background: var(--turq);
  color: var(--navy);
  border: 0;
  border-radius: 999px;
  padding: 11px 20px;
  font: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  margin-top: 4px;
}
.lab-subscribe__btn:hover { background: #00d5e2; }
.lab-subscribe__btn:active { transform: scale(0.98); }
.lab-subscribe__btn:disabled { opacity: 0.6; cursor: default; }
.lab-subscribe__feedback {
  font-size: 0.85rem;
  min-height: 1.2em;
  color: var(--turq);
}
.lab-subscribe__feedback--error { color: var(--coral); }
.lab-subscribe__ok {
  color: var(--turq);
  font-size: 0.9rem;
  margin: 0;
  padding: 4px 0;
}

/* Footer */
.atlas-footer {
  margin-top: clamp(40px, 6vw, 72px);
  background: var(--navy); color: #cdd6e6;
}
.atlas-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 48px) var(--gutter);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(20px, 3vw, 36px);
}
.atlas-footer h2, .atlas-footer h3 { color: var(--paper); margin: 0 0 10px; font-size: 1.05rem; }
.atlas-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.atlas-footer a { color: #cdd6e6; text-decoration: none; }
.atlas-footer a:hover { color: var(--paper); text-decoration: underline; }
.atlas-footer__subscribe-desc { font-size: 0.85rem; color: #a8b6cc; margin: 0 0 12px; line-height: 1.4; }
.atlas-footer-subscribe { display: flex; flex-direction: column; gap: 8px; }
.lab-subscribe__input--footer {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.13);
}
.lab-subscribe__btn--footer {
  padding: 9px 16px;
  font-size: 0.9rem;
  align-self: flex-start;
}
.atlas-footer__base {
  border-top: 1px solid #243553;
  padding: 14px var(--gutter);
  text-align: center;
  font-size: 0.85rem;
  color: #99a5ba;
}
@media (max-width: 900px) {
  .atlas-footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .atlas-footer__inner { grid-template-columns: 1fr; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}