:root {
  --bg: #f4f1eb;
  --paper: #fffdf9;
  --text: #1f2933;
  --muted: #52606d;
  --line: #d9e2ec;
  --brand: #0b5f74;
  --brand-soft: #d8ecf1;
  --accent: #d37b2a;
  --ok: #0f766e;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(31, 41, 51, 0.08);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Source Sans 3', 'Segoe UI', Tahoma, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 85% -5%, #d9ecf2 0, transparent 35%),
    radial-gradient(circle at -10% 20%, #f5e5d3 0, transparent 35%),
    var(--bg);
  line-height: 1.7;
}

a {
  color: var(--brand);
}

.site-header {
  border-bottom: 1px solid rgba(11, 95, 116, 0.2);
  background: rgba(255, 253, 249, 0.82);
  backdrop-filter: blur(4px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

.header-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 72px;
}

.brand {
  font-family: 'Merriweather', Georgia, serif;
  color: var(--text);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 700;
}

.top-link {
  text-decoration: none;
  font-weight: 600;
}

main {
  padding: 32px 0 48px;
}

.hero,
.reading-card,
.decoder,
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero,
.reading-card,
.decoder {
  padding: 26px;
}

.hero h1,
.reading-card h1,
.reading-card h2,
.decoder h2,
.section-title {
  font-family: 'Merriweather', Georgia, serif;
  line-height: 1.3;
  margin-top: 0;
}

.hero p {
  max-width: 65ch;
  color: var(--muted);
  margin-bottom: 0;
}

.meta {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  display: inline-block;
  background: var(--brand-soft);
  color: #174152;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}

.grid {
  margin-top: 20px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  padding: 18px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card a {
  text-decoration: none;
}

.section {
  margin-top: 24px;
}

.reading-card {
  max-width: 760px;
  margin: 0 auto;
}

.reading-card ul {
  padding-left: 20px;
}

.reading-card li + li {
  margin-top: 8px;
}

.notice {
  border-left: 4px solid var(--accent);
  background: #fff8f0;
  padding: 12px 14px;
  border-radius: 8px;
  margin: 16px 0;
}

.good {
  border-left-color: var(--ok);
  background: #ecfdf8;
}

.warn {
  border-left-color: var(--danger);
  background: #fff1f1;
}

.actions {
  margin-top: 22px;
}

.btn {
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 8px;
  font-weight: 700;
  display: inline-block;
  cursor: pointer;
}

.btn.secondary {
  color: var(--brand);
  background: transparent;
}

.decoder {
  margin-top: 24px;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

input[type="text"] {
  border: 1px solid #bcccdc;
  background: #fff;
  border-radius: 8px;
  padding: 12px;
  font-size: 1rem;
}

.result-list {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.result-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fff;
}

.result-item h4 {
  margin: 0 0 6px;
}

.result-meta {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 6px;
}

.learn-more {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8fbfd;
  overflow: hidden;
}

.learn-more summary {
  cursor: pointer;
  font-weight: 700;
  padding: 12px 14px;
}

.learn-more .learn-more-content {
  padding: 0 14px 14px;
}

.learn-more .learn-more-content p {
  margin: 0 0 10px;
}

.ad-footer {
  margin: 12px auto 16px;
  max-width: 760px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.ad-label {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.ad-slot {
  min-height: 90px;
}

.site-footer {
  border-top: 1px solid rgba(11, 95, 116, 0.2);
  padding: 20px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .hero,
  .reading-card,
  .decoder {
    padding: 18px;
  }

  .header-wrap {
    min-height: 60px;
  }

  .search-row {
    grid-template-columns: 1fr;
  }
}