:root {
  --bg: #f8fafc;
  --bg-alt: #eef6ff;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #ffffff;
  --line: rgba(15, 23, 42, 0.08);
  --line-strong: rgba(79, 70, 229, 0.14);
  --text: #0f172a;
  --muted: #475569;
  --muted-soft: #64748b;
  --primary: #4f46e5;
  --secondary: #06b6d4;
  --accent: #22c55e;
  --warning: #f59e0b;
  --shadow-lg: 0 30px 80px rgba(79, 70, 229, 0.12);
  --shadow-md: 0 20px 45px rgba(15, 23, 42, 0.08);
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 32px;
  --radius-pill: 999px;
  --container: 1180px;
}

[data-theme="dark"] {
  --bg: #07111f;
  --bg-alt: #0d1727;
  --surface: rgba(12, 23, 40, 0.8);
  --surface-strong: #0f1b2d;
  --line: rgba(148, 163, 184, 0.14);
  --line-strong: rgba(6, 182, 212, 0.2);
  --text: #e2e8f0;
  --muted: #cbd5e1;
  --muted-soft: #94a3b8;
  --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 20px 45px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.16), transparent 28rem),
    radial-gradient(circle at 92% 12%, rgba(6, 182, 212, 0.18), transparent 22rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }
.container { width: min(calc(100% - 2rem), var(--container)); margin: 0 auto; }
.sr-only {
  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 {
  position: absolute;
  left: -999px;
  top: 1rem;
  z-index: 100;
  background: var(--text);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-pill);
}
.skip-link:focus { left: 1rem; }
.ambient {
  position: fixed;
  width: 28rem;
  height: 28rem;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.34;
  pointer-events: none;
}
.ambient-a { top: -10rem; left: -6rem; background: rgba(79, 70, 229, 0.24); }
.ambient-b { right: -7rem; top: 18rem; background: rgba(6, 182, 212, 0.18); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(248, 250, 252, 0.72);
  border-bottom: 1px solid var(--line);
}
[data-theme="dark"] .site-header { background: rgba(7, 17, 31, 0.72); }
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.6rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
  flex: 0 0 auto;
  max-width: none;
}
.brand-logo-wrap {
  display: inline-flex;
  align-items: center;
  max-width: 8.9rem;
  min-width: 0;
  flex: 0 1 auto;
}
.brand-logo {
  display: block;
  width: auto;
  max-width: 100%;
  height: 3.1rem;
  object-fit: contain;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.9rem;
  height: 2.9rem;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow-md);
}
.brand-copy {
  min-width: 0;
}
.brand-copy strong, .brand-copy em {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.brand-copy strong {
  font-family: Poppins, Inter, sans-serif;
  font-size: 1rem;
  line-height: 1.1;
}
.brand-copy em {
  font-style: normal;
  color: var(--muted-soft);
  font-size: 0.8rem;
}
.primary-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1 1 auto;
  min-width: 0;
  justify-content: flex-end;
}
.primary-nav__links {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
  flex: 1 1 auto;
  justify-content: flex-end;
}
.primary-nav__links a {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
  white-space: nowrap;
}
.primary-nav__links a:hover { color: var(--text); }
.header-search {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  width: 3.3rem;
  flex: 0 0 3.3rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.72);
  overflow: hidden;
  transition: width 180ms ease, flex-basis 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
[data-theme="dark"] .header-search { background: rgba(15, 27, 45, 0.8); }
.header-search.is-open {
  width: min(100%, 18rem);
  flex: 0 0 18rem;
  box-shadow: var(--shadow-md);
}
.header-search input {
  flex: 0 1 0;
  min-width: 0;
  width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transition: width 180ms ease, opacity 140ms ease, padding 180ms ease;
}
.header-search.is-open input {
  flex: 1 1 auto;
  width: 100%;
  padding: 0 0.6rem;
  opacity: 1;
  pointer-events: auto;
}
.header-search button,
.button {
  border: 0;
  cursor: pointer;
  border-radius: var(--radius-pill);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
.header-search button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1rem;
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--line);
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
}
.header-search__icon {
  width: 1rem;
  height: 1rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.3rem;
  font-weight: 700;
}
.button:hover,
.header-search button:hover,
.nav-toggle:hover { transform: translateY(-1px); }
.button-primary {
  background: linear-gradient(135deg, var(--primary), #5fd1ff);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.button-secondary {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
}
.button-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 0 0 auto;
}
.nav-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border-radius: 18px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
}
.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 0.25rem auto;
  background: var(--text);
}
.site-main { padding: 2.5rem 0 6rem; }
.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.hero {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1.25fr) minmax(20rem, 0.85fr);
  align-items: stretch;
  margin-bottom: 4.5rem;
}
.hero-copy,
.hero-panel,
.surface,
.tool-card,
.list-card,
.prompt-card,
.review-card,
.article-card,
.affiliate-box,
.summary-box,
.comparison-shell,
.toc-block__inner,
.info-card {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}
.hero-copy {
  padding: clamp(2rem, 4vw, 3.5rem);
  position: relative;
  overflow: hidden;
}
.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto auto -4rem -4rem;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.2), transparent 70%);
}
.hero h1,
.page-hero h1,
.tool-hero h1,
.article-hero h1 {
  margin: 0 0 1rem;
  font-family: Poppins, Inter, sans-serif;
  font-size: clamp(2.75rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}
.hero p,
.page-hero p,
.tool-hero p,
.article-hero p,
.lead {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin: 1.5rem 0 1.25rem;
}
.hero-search {
  display: flex;
  gap: 0.75rem;
  margin: 1.5rem 0 1rem;
  padding: 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  border: 1px solid var(--line);
}
.hero-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  outline: none;
  color: var(--text);
  padding: 0 0.8rem;
}
.chip-row {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(79, 70, 229, 0.08);
  padding: 0.6rem 0.9rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary);
}
.hero-panel {
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
}
.hero-panel__card,
.info-card {
  padding: 1.15rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
}
[data-theme="dark"] .hero-panel__card,
[data-theme="dark"] .info-card { background: rgba(15, 27, 45, 0.7); }
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}
.stat {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(79, 70, 229, 0.08), rgba(6, 182, 212, 0.06));
  border: 1px solid var(--line);
}
.stat strong {
  display: block;
  font-size: 1.35rem;
  font-family: Poppins, Inter, sans-serif;
}
section { margin-bottom: clamp(4rem, 8vw, 6rem); }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.section-head h2 {
  margin: 0;
  font-family: Poppins, Inter, sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}
.section-head p { margin: 0; color: var(--muted); max-width: 42rem; }
.tool-grid,
.card-grid,
.review-grid,
.article-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.tool-card,
.review-card,
.article-card,
.prompt-card,
.list-card { padding: 1.3rem; }
.tool-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.tool-card__top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.9rem;
  align-items: start;
}
.tool-card__icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 1rem;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.14), rgba(6, 182, 212, 0.12));
  font-weight: 800;
  color: var(--primary);
}
.tool-card h3,
.review-card h3,
.article-card h3,
.prompt-card h3 {
  margin: 0;
  font-size: 1.1rem;
}
.tool-card__body,
.review-card p,
.article-card p,
.prompt-card p { color: var(--muted); }
.tool-card__body {
  flex: 1 1 auto;
}
.badge {
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-pill);
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
}
.tool-card__meta,
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 0.85rem 0 1rem;
  color: var(--muted-soft);
  font-size: 0.92rem;
}
.rank-list { display: grid; gap: 1rem; }
.rank-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.2rem 1.3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}
.rank-number {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 1rem;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  font-weight: 800;
}
.best-choice {
  border-color: rgba(34, 197, 94, 0.36);
  background: linear-gradient(180deg, rgba(34, 197, 94, 0.08), rgba(255, 255, 255, 0.9));
}
[data-theme="dark"] .best-choice {
  background: linear-gradient(180deg, rgba(34, 197, 94, 0.12), rgba(15, 27, 45, 0.92));
}
.use-case-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.use-case {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
}
.use-case strong { display: block; margin-bottom: 0.4rem; }
.use-case p { margin: 0 0 0.9rem; color: var(--muted); }
.prompt-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.prompt-card { position: relative; overflow: hidden; }
.prompt-card::before {
  content: "";
  position: absolute;
  inset: auto -3rem -3rem auto;
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.16), transparent 70%);
}
.surface,
.summary-box,
.page-section,
.page-card,
.article-layout,
.tool-layout,
.search-layout {
  padding: clamp(1.5rem, 3vw, 2.2rem);
}
.page-stack {
  display: grid;
  gap: 1.35rem;
}
.page-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}
[data-theme="dark"] .page-card { background: rgba(15, 27, 45, 0.72); }
.page-hero,
.tool-hero,
.article-hero {
  padding: clamp(2rem, 4vw, 3rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  margin-bottom: 2rem;
}
.filter-bar,
.pagination,
.internal-links,
.faq-grid,
.article-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.page-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
}
.page-toolbar > div {
  flex: 1 1 18rem;
  min-width: 0;
}
.page-toolbar__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-content: flex-start;
  justify-content: flex-end;
}
.page-toolbar__meta span {
  display: inline-flex;
  align-items: center;
  padding: 0.72rem 0.95rem;
  border-radius: var(--radius-pill);
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 700;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.45;
}
.page-card .section-head {
  margin-bottom: 1.25rem;
}
.page-card .section-head p {
  max-width: 34rem;
}
.filter-pill,
.pagination a,
.internal-links a {
  padding: 0.7rem 0.95rem;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  border: 1px solid var(--line);
  font-weight: 700;
  color: var(--muted);
}
.filter-pill.is-active {
  background: rgba(79, 70, 229, 0.12);
  border-color: rgba(79, 70, 229, 0.18);
  color: var(--primary);
}
.link-stack {
  display: grid;
  gap: 1rem;
}
.toc-related {
  margin-top: 1rem;
}
.tool-layout {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 1.65fr) minmax(18rem, 0.85fr);
}
.article-layout {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 1.7fr) minmax(16rem, 0.75fr);
}
.summary-box {
  display: grid;
  gap: 1rem;
}
.summary-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.summary-grid .info-card strong {
  display: block;
  margin-bottom: 0.35rem;
}
.pros-cons {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.pros-cons ul,
.faq-grid ul,
.sidebar-list,
.toc-block ul {
  margin: 0;
  padding-left: 1.1rem;
}
.affiliate-box {
  padding: 1.35rem;
  position: relative;
  overflow: hidden;
}
.affiliate-box::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px auto;
  width: 100%;
  height: 0.35rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}
.affiliate-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1rem 0;
  color: var(--muted-soft);
}
.comparison-shell { overflow-x: auto; }
.comparison-table {
  width: 100%;
  border-collapse: collapse;
}
.comparison-table th,
.comparison-table td {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.comparison-table th {
  color: var(--muted-soft);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.rating-stars {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
  color: var(--warning);
  font-weight: 700;
}
.rating-star { opacity: 0.22; }
.rating-star.is-on { opacity: 1; }
.rating-value,
.rating-reviews { color: var(--muted); margin-left: 0.35rem; }
.sidebar-stack {
  display: grid;
  gap: 1rem;
  align-content: start;
}
.sidebar-card {
  padding: 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}
.sidebar-card h3,
.toc-block h3 { margin-top: 0; }
.toc-block { position: sticky; top: 6.5rem; }
.article-body {
  display: grid;
  gap: 1.35rem;
}
.article-body section,
.page-section {
  margin: 0;
  padding: 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
}
[data-theme="dark"] .article-body section,
[data-theme="dark"] .page-section { background: rgba(15, 27, 45, 0.65); }
.article-body h2,
.page-section h2 {
  margin: 0 0 0.9rem;
  font-family: Poppins, Inter, sans-serif;
}
.search-shell {
  display: grid;
  gap: 1rem;
}
.search-form-large {
  display: flex;
  gap: 0.75rem;
  padding: 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--surface-strong);
}
.search-form-large input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: none;
  color: var(--text);
  padding: 0 0.7rem;
}
.search-results {
  display: grid;
  gap: 0.9rem;
}
.search-result {
  padding: 1rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
}
.site-footer {
  padding: 2rem 0 6rem;
  border-top: 1px solid var(--line);
}
.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  align-items: start;
  margin-bottom: 1.5rem;
}
.footer-brand h2 {
  margin: 0 0 0.7rem;
  font-family: Poppins, Inter, sans-serif;
}
.footer-brand p,
.footer-note,
.footer-column a,
.footer-bottom p { color: var(--muted); }
.footer-links-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.footer-column h3 { margin: 0 0 0.85rem; font-size: 1rem; }
.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}
.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}
.mobile-cta {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 45;
  display: none;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: calc(var(--radius-lg) + 4px);
  background: rgba(15, 23, 42, 0.88);
  box-shadow: var(--shadow-lg);
}
.mobile-cta .button { flex: 1; }
.hidden { display: none !important; }

@media (max-width: 1100px) {
  .hero,
  .tool-layout,
  .article-layout,
  .footer-grid,
  .footer-links-grid { grid-template-columns: 1fr; }
  .page-toolbar__meta { justify-content: flex-start; }
  .tool-grid,
  .card-grid,
  .review-grid,
  .article-grid,
  .prompt-grid,
  .use-case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1280px) {
  .brand-logo-wrap {
    max-width: 7.4rem;
  }
  .brand-logo { height: 2.7rem; }
  .brand-copy em {
    display: none;
  }
  .primary-nav {
    gap: 0.75rem;
  }
  .primary-nav__links {
    gap: 0.8rem;
  }
  .primary-nav__links a {
    font-size: 0.85rem;
  }
  .header-search {
    width: 3.15rem;
    flex-basis: 3.15rem;
  }
  .header-search.is-open { flex: 0 0 14rem; }
  .button {
    padding: 0.82rem 1.05rem;
  }
}

@media (max-width: 900px) {
  .nav-shell { min-height: 4.3rem; }
  .brand-logo-wrap { max-width: 6.9rem; }
  .brand-logo { height: 2.45rem; }
  .nav-toggle { display: inline-grid; place-items: center; margin-left: auto; }
  .primary-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.6rem);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: var(--surface-strong);
    box-shadow: var(--shadow-lg);
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav__links,
  .nav-actions { flex-direction: column; align-items: stretch; }
  .header-search,
  .header-search.is-open {
    width: 100%;
    flex: 1 1 auto;
  }
  .header-search input,
  .header-search.is-open input {
    width: 100%;
    padding: 0 0.6rem;
    opacity: 1;
    pointer-events: auto;
  }
  .stats-row,
  .summary-grid,
  .pros-cons { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .site-main { padding-top: 1.5rem; }
  .hero-search,
  .search-form-large,
  .rank-item,
  .section-head { grid-template-columns: 1fr; }
  .tool-grid,
  .card-grid,
  .review-grid,
  .article-grid,
  .prompt-grid,
  .use-case-grid { grid-template-columns: 1fr; }
  .page-toolbar,
  .page-toolbar__meta { flex-direction: column; align-items: stretch; }
  .hero-actions,
  .filter-bar,
  .pagination,
  .internal-links,
  .faq-grid,
  .article-cta { flex-direction: column; }
  .mobile-cta { display: flex; }
}