/* Betta Fish Facts — main stylesheet */
:root {
  --ink: #17313f;
  --ink-soft: #4a6472;
  --deep: #0b3954;
  --teal: #116d8c;
  --aqua: #bfe3ef;
  --mist: #f2f8fa;
  --coral: #ff5a5f;
  --coral-dark: #e04347;
  --gold: #f4a259;
  --card: #ffffff;
  --line: #dce9ef;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(11, 57, 84, 0.08);
  --shadow-lg: 0 8px 30px rgba(11, 57, 84, 0.14);
  --max: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--mist);
  line-height: 1.7;
  font-size: 17px;
}
img { max-width: 100%; height: auto; }
a { color: var(--teal); }
a:hover { color: var(--coral-dark); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--deep) 0%, var(--teal) 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; }
.brand img { height: 52px; width: auto; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-size: 1.25rem; font-weight: 800; letter-spacing: 0.3px; }
.brand-tag { font-size: 0.72rem; color: var(--aqua); }

.main-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.main-nav a {
  color: #eaf6fb;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 12px;
  border-radius: 8px;
}
.main-nav a:hover, .main-nav a.active { background: rgba(255, 255, 255, 0.14); color: #fff; }
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid rgba(255,255,255,0.5);
  color: #fff;
  font-size: 1.2rem;
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
}
.search-btn {
  background: rgba(255,255,255,0.14);
  border: none;
  color: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
}
.search-btn:hover { background: rgba(255,255,255,0.25); }

/* Search overlay */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(11, 57, 84, 0.85);
  z-index: 100;
  padding: 10vh 20px 20px;
}
.search-overlay.open { display: block; }
.search-panel { max-width: 640px; margin: 0 auto; }
.search-panel input {
  width: 100%;
  font-size: 1.2rem;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: none;
  outline: 3px solid var(--coral);
}
.search-results { margin-top: 14px; background: #fff; border-radius: var(--radius); overflow: hidden; max-height: 55vh; overflow-y: auto; }
.search-results a { display: block; padding: 12px 18px; text-decoration: none; border-bottom: 1px solid var(--line); }
.search-results a:hover { background: var(--mist); }
.search-results .sr-title { font-weight: 700; color: var(--deep); }
.search-results .sr-desc { font-size: 0.85rem; color: var(--ink-soft); }
.search-close { position: absolute; top: 18px; right: 24px; background: none; border: none; color: #fff; font-size: 2rem; cursor: pointer; }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--deep) 0%, var(--teal) 70%, #1b8aa8 100%);
  color: #fff;
  padding: 56px 0 64px;
}
.hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 2.5rem; line-height: 1.2; margin: 0 0 16px; }
.hero p { color: #d9eef6; font-size: 1.08rem; max-width: 56ch; }
.hero-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }
.btn {
  display: inline-block;
  background: var(--coral);
  color: #fff !important;
  font-weight: 700;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 999px;
  margin-top: 10px;
  box-shadow: var(--shadow);
}
.btn:hover { background: var(--coral-dark); }
.btn.ghost { background: rgba(255,255,255,0.14); margin-left: 10px; }
.btn.ghost:hover { background: rgba(255,255,255,0.25); }

/* Sections */
.section { padding: 44px 0; }
.section-title { font-size: 1.6rem; color: var(--deep); margin: 0 0 6px; }
.section-sub { color: var(--ink-soft); margin: 0 0 24px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card .cat-pill { margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; font-size: 1.12rem; line-height: 1.35; }
.card h3 a { text-decoration: none; color: var(--deep); }
.card h3 a:hover { color: var(--coral-dark); }
.card p { color: var(--ink-soft); font-size: 0.92rem; margin: 0 0 12px; flex: 1; }
.card .read-more { font-weight: 700; font-size: 0.88rem; text-decoration: none; }
.cat-pill {
  display: inline-block;
  align-self: flex-start;
  background: var(--aqua);
  color: var(--deep);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: 999px;
  text-decoration: none;
}
.cat-pill:hover { background: var(--deep); color: #fff; }

/* Category strip on homepage */
.cat-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cat-tile {
  background: linear-gradient(150deg, var(--deep), var(--teal));
  color: #fff;
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  box-shadow: var(--shadow);
}
.cat-tile:hover { outline: 3px solid var(--coral); color: #fff; }
.cat-tile h3 { margin: 0 0 6px; }
.cat-tile p { margin: 0; color: var(--aqua); font-size: 0.88rem; }

/* Article layout */
.page-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 32px; padding: 36px 0 56px; }
.article-main { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px 40px; min-width: 0; }
.breadcrumb { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 14px; }
.breadcrumb a { text-decoration: none; }
.article-main h1 { color: var(--deep); font-size: 2.05rem; line-height: 1.25; margin: 6px 0 10px; }
.article-meta { color: var(--ink-soft); font-size: 0.85rem; margin-bottom: 22px; padding-bottom: 16px; border-bottom: 2px solid var(--line); }
.article-body h2 { color: var(--deep); margin-top: 36px; font-size: 1.45rem; }
.article-body h3 { color: var(--teal); margin-top: 26px; font-size: 1.15rem; }
.article-body table { border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 0.92rem; }
.article-body th { background: var(--deep); color: #fff; text-align: left; padding: 10px 12px; }
.article-body td { border: 1px solid var(--line); padding: 9px 12px; }
.article-body tr:nth-child(even) td { background: var(--mist); }
.article-body ul li, .article-body ol li { margin-bottom: 6px; }
.article-body blockquote {
  border-left: 4px solid var(--coral);
  background: var(--mist);
  margin: 18px 0;
  padding: 12px 18px;
  border-radius: 0 8px 8px 0;
}

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 22px; }
.side-box { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.side-box h3 { margin: 0 0 14px; color: var(--deep); font-size: 1.02rem; text-transform: uppercase; letter-spacing: 0.6px; border-bottom: 3px solid var(--coral); padding-bottom: 8px; }
.side-box ul { list-style: none; margin: 0; padding: 0; }
.side-box ul li { border-bottom: 1px solid var(--line); }
.side-box ul li:last-child { border-bottom: none; }
.side-box ul a { display: block; padding: 9px 2px; text-decoration: none; font-size: 0.92rem; font-weight: 600; color: var(--ink); }
.side-box ul a:hover { color: var(--coral-dark); }
.newsletter-box { background: linear-gradient(150deg, var(--deep), var(--teal)); color: #fff; }
.newsletter-box h3 { color: #fff; border-color: var(--gold); }
.newsletter-box p { font-size: 0.88rem; color: var(--aqua); }
.newsletter-box input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: none;
  margin-bottom: 10px;
  font-size: 0.92rem;
}
.newsletter-box button { width: 100%; border: none; cursor: pointer; font-size: 0.95rem; }

/* Related articles */
.related { margin-top: 44px; padding-top: 22px; border-top: 2px solid var(--line); }
.related h2 { color: var(--deep); font-size: 1.25rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-grid a {
  background: var(--mist);
  border-radius: 10px;
  padding: 14px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--deep);
  border: 1px solid var(--line);
}
.related-grid a:hover { border-color: var(--coral); color: var(--coral-dark); }

/* Ad slots */
.ad-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 22px auto;
  min-height: 0;
}
.ad-slot:empty { margin: 0; }
.ad-slot .ad-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #9ab2bd;
  margin-bottom: 4px;
}
.ad-slot img { border-radius: 8px; box-shadow: var(--shadow); }
.ad-slot a { line-height: 0; }

/* Article list page */
.list-header { background: linear-gradient(160deg, var(--deep), var(--teal)); color: #fff; padding: 36px 0; }
.list-header h1 { margin: 0 0 8px; }
.list-header p { color: var(--aqua); margin: 0; }

/* Footer */
.site-footer { background: var(--deep); color: var(--aqua); margin-top: 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; padding: 40px 0 28px; }
.site-footer h4 { color: #fff; margin: 0 0 12px; }
.site-footer p { font-size: 0.88rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--aqua); text-decoration: none; font-size: 0.9rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); padding: 16px 0; font-size: 0.8rem; text-align: center; }

/* Utility */
.callout {
  background: var(--mist);
  border: 1px solid var(--aqua);
  border-left: 5px solid var(--teal);
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  margin: 18px 0;
}
.center { text-align: center; }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-img { display: none; }
  .card-grid, .cat-strip, .related-grid { grid-template-columns: repeat(2, 1fr); }
  .page-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .card-grid, .cat-strip, .related-grid, .footer-grid { grid-template-columns: 1fr; }
  .article-main { padding: 24px 20px; }
  .hero h1 { font-size: 1.8rem; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--deep);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 16px 16px;
  }
  .main-nav.open { display: flex; }
}