/* ============================================================
   Advanced Visual Variants & Interactions
   - Config-driven via body classes: hero-*, card-*, layout-*, anim-*
   - SEO-safe: no content hiding, all text remains in DOM
   - Mobile-first, respects prefers-reduced-motion
   ============================================================ */

/* === Scroll Reveal Animation === */
.anim-fade-up [data-anim] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.anim-fade-in [data-anim] {
  opacity: 0;
  transition: opacity 0.6s ease;
}
.anim-slide-left [data-anim] {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
[data-anim].is-visible {
  opacity: 1 !important;
  transform: none !important;
}

@media (prefers-reduced-motion: reduce) {
  [data-anim] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* === Hero Variants === */
.hero--center-search {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 80px 24px 60px;
}
.hero--center-search .hero-search {
  display: flex;
  gap: 8px;
  width: min(560px, 90vw);
  margin: 24px auto 0;
  padding: 6px 6px 6px 18px;
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  box-shadow: var(--card-shadow);
}
.hero--center-search .hero-search input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 15px;
  background: transparent;
  color: var(--text-main);
}
.hero--center-search .hero-search button {
  padding: 10px 20px;
  border: none;
  border-radius: 999px;
  background: var(--theme);
  color: var(--body-bg, #0d1117);
  font-weight: 700;
  cursor: pointer;
}

.hero--left-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  text-align: left;
}
.hero--left-right .hero-shot { margin: 0; width: 100%; }
.hero--left-right .hero-text { order: -1; }

.hero--gradient {
  padding: 80px 24px 60px;
  text-align: center;
  background: linear-gradient(135deg, var(--theme), var(--accent, var(--theme)));
  color: #fff;
}
.hero--gradient h1,
.hero--gradient p,
.hero--gradient .eyebrow { color: #fff; }
.hero--gradient .eyebrow { opacity: 0.85; }
.hero--gradient .hero-shot { box-shadow: 0 22px 70px rgba(0,0,0,0.3); }
.hero--gradient .secondary-button {
  color: #fff;
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.1);
}

.hero--card-overlay {
  position: relative;
  padding: 100px 24px 80px;
  text-align: center;
}
.hero--card-overlay .hero-card {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 36px;
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg, 20px);
  box-shadow: var(--card-shadow-strong);
}

@media (max-width: 768px) {
  .hero--left-right { grid-template-columns: 1fr; text-align: center; }
  .hero--left-right .hero-text { order: 0; }
}

/* === Card Styles === */
.card-hover-lift .news-card,
.card-hover-lift .feature-card,
.card-hover-lift .trust-item,
.card-hover-lift .side-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card-hover-lift .news-card:hover,
.card-hover-lift .feature-card:hover,
.card-hover-lift .trust-item:hover,
.card-hover-lift .side-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-strong);
}

.card-hover-glow .news-card,
.card-hover-glow .feature-card,
.card-hover-glow .trust-item {
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.card-hover-glow .news-card:hover,
.card-hover-glow .feature-card:hover,
.card-hover-glow .trust-item:hover {
  border-color: var(--theme);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--theme) 20%, transparent),
              var(--card-shadow-strong);
}

.card-hover-lift .news-card img,
.card-hover-glow .news-card img {
  transition: transform 0.3s ease;
}
.card-hover-lift .news-card:hover img,
.card-hover-glow .news-card:hover img {
  transform: scale(1.03);
}

.card-glass .news-card,
.card-glass .feature-card,
.card-glass .trust-item {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
}

/* === Horizontal Scroll === */
.scroll-x {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
  scrollbar-width: thin;
}
.scroll-x > * { flex: 0 0 auto; scroll-snap-align: start; }
.scroll-x::-webkit-scrollbar { height: 4px; }
.scroll-x::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--theme) 40%, transparent);
  border-radius: 4px;
}

.scroll-x .news-card { width: 280px; }
.scroll-x .tool-card { width: 200px; }
.scroll-x .category-pill {
  padding: 8px 18px;
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}
.scroll-x .category-pill:hover { border-color: var(--theme); color: var(--theme); }

/* === FAQ Collapsible === */
.faq-section {
  width: min(800px, 88vw);
  margin: 0 auto;
  padding: 48px 0;
}
.faq-section h2 {
  text-align: center;
  margin-bottom: 24px;
  font-size: clamp(24px, 3vw, 34px);
}
.faq-section details {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm, 8px);
  margin-bottom: 12px;
  background: var(--panel);
  overflow: hidden;
}
.faq-section details summary {
  padding: 16px 20px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-main);
}
.faq-section details summary::-webkit-details-marker { display: none; }
.faq-section details summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--theme);
  transition: transform 0.2s ease;
}
.faq-section details[open] summary::after { transform: rotate(45deg); }
.faq-section details .faq-answer {
  padding: 0 20px 16px;
  color: var(--text-sub);
  line-height: 1.8;
}

/* === Comparison Table === */
.comparison {
  width: min(1080px, 88vw);
  margin: 0 auto;
  padding: 48px 0;
}
.comparison h2 {
  text-align: center;
  margin-bottom: 24px;
  font-size: clamp(24px, 3vw, 34px);
}
.table-scroll-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm, 8px);
}
.table-scroll-wrapper table {
  min-width: 600px;
  width: 100%;
  border-collapse: collapse;
}
.table-scroll-wrapper th,
.table-scroll-wrapper td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line, var(--card-border));
  white-space: nowrap;
  color: var(--text-main);
}
.table-scroll-wrapper th {
  background: var(--panel-soft, var(--panel));
  font-weight: 700;
  position: sticky;
  top: 0;
}

/* === Content Layout Variants === */
.layout-grid .news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.layout-list-rank .news-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: rank;
}
.layout-list-rank .news-card {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  counter-increment: rank;
}
.layout-list-rank .news-card::before {
  content: counter(rank);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-left: 12px;
  background: var(--theme);
  color: var(--body-bg, #0d1117);
  font-weight: 800;
  border-radius: 50%;
  font-size: 14px;
}
.layout-list-rank .news-card img { display: none; }
.layout-list-rank .news-card a { display: flex; align-items: center; gap: 16px; }

.layout-masonry .news-grid {
  display: block;
  columns: 3;
  column-gap: 20px;
}
.layout-masonry .news-card { break-inside: avoid; margin-bottom: 20px; }

.layout-left-image-right-text .news-grid {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.layout-left-image-right-text .news-card a {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  align-items: center;
}
.layout-left-image-right-text .news-card img {
  aspect-ratio: 4/3;
  border-radius: var(--radius-sm, 8px);
}

@media (max-width: 768px) {
  .layout-masonry .news-grid { columns: 1; }
  .layout-left-image-right-text .news-card a { grid-template-columns: 1fr; }
  .layout-list-rank .news-card { grid-template-columns: 40px 1fr; }
}

/* === Category Nav === */
.category-nav {
  width: min(1080px, 88vw);
  margin: 0 auto;
  padding: 24px 0 0;
}
.category-nav .scroll-x { gap: 10px; }

/* === Hot Tools === */
.hot-tools {
  width: min(1080px, 88vw);
  margin: 0 auto;
  padding: 48px 0;
}
.hot-tools h2 { margin-bottom: 20px; font-size: clamp(24px, 3vw, 34px); }
.tool-card {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm, 8px);
  box-shadow: var(--card-shadow);
}
.tool-card h3 { font-size: 15px; margin: 0 0 6px; color: var(--text-main); }
.tool-card p { font-size: 13px; color: var(--text-sub); margin: 0; }

/* === Theme Variants === */
.theme-vibrant {
  --card-shadow: 0 12px 30px color-mix(in srgb, var(--theme) 20%, transparent);
  --card-shadow-strong: 0 18px 42px color-mix(in srgb, var(--theme) 30%, transparent);
}
.theme-muted {
  --theme: #8b949e;
  --accent: #6b7280;
}
.theme-mono {
  --theme: #e6edf3;
  --accent: #8b949e;
}

/* === Nav Toggle === */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border: none;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === Footer Bottom === */
.footer-main {
  display: flex;
  justify-content: center;
  gap: min(7vw, 80px);
  padding-bottom: 36px;
}
.footer-main div { display: grid; gap: 8px; min-width: 110px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p { margin: 0; color: var(--text-sub); font-size: 13px; }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    order: 3;
    width: 100%;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
    border-top: 1px solid var(--line, var(--card-border));
  }
  .main-nav.is-open { display: flex; }
  .footer-main { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}