:root {
  --color-bg: #ffffff;
  --color-fg: #111827;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-primary: #2563eb;
  --color-primary-fg: #ffffff;
  --color-accent: #f59e0b;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-card-bg: #f9fafb;
  --radius: 8px;
  --max-width: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-fg);
  background: var(--color-bg);
  line-height: 1.6;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 1.5rem; }

h1, h2, h3 { line-height: 1.25; margin: 1.5rem 0 0.75rem; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; border-bottom: 1px solid var(--color-border); padding-bottom: 0.25rem; }
h3 { font-size: 1.15rem; }
a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }

/* Site chrome */
.site-header { border-bottom: 1px solid var(--color-border); padding: 0.75rem 0; }
.site-header .container { display: flex; justify-content: space-between; align-items: center; padding: 0 1.5rem; }
.site-logo { font-weight: 700; text-decoration: none; color: var(--color-fg); font-size: 1.15rem; }
.site-nav { display: flex; align-items: center; gap: 1.5rem; }
.site-nav .menu { list-style: none; display: flex; gap: 1.25rem; margin: 0; padding: 0; }
.site-nav__cta { padding: 0.45rem 0.95rem; background: var(--color-primary); color: var(--color-primary-fg); border-radius: var(--radius); font-weight: 600; text-decoration: none; font-size: 0.92rem; white-space: nowrap; }
.site-nav__cta:hover { filter: brightness(1.08); color: var(--color-primary-fg); }
@media (max-width: 600px) {
  .site-nav__cta { padding: 0.4rem 0.75rem; font-size: 0.85rem; }
}
.site-nav .menu a { text-decoration: none; color: var(--color-fg); font-weight: 500; }
.site-nav .menu li { position: relative; }
.site-nav .menu .menu-item-has-children > a::after { content: " ▾"; font-size: 0.75em; color: var(--color-muted); }
.site-nav .menu .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  z-index: 20;
}
.site-nav .menu .sub-menu li { display: block; }
.site-nav .menu .sub-menu a { display: block; padding: 0.5rem 1rem; }
.site-nav .menu .sub-menu a:hover { background: var(--color-card-bg); }
.site-nav .menu .menu-item-has-children:hover > .sub-menu,
.site-nav .menu .menu-item-has-children:focus-within > .sub-menu { display: block; }
.site-footer { border-top: 1px solid var(--color-border); padding: 2rem 0; margin-top: 3rem; color: var(--color-muted); font-size: 0.9rem; }
.site-footer .container { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1rem; }
.affiliate-disclosure-footer { margin: 0; max-width: 720px; }
.footer-menu { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.25rem; }
.footer-menu a { color: var(--color-fg); text-decoration: none; font-weight: 500; }
.footer-menu a:hover { color: var(--color-primary); text-decoration: underline; }
.site-footer .copyright { margin: 0; color: var(--color-muted); }

/* Back-link */
.back-to-cluster { margin: 0 0 1rem; font-size: 0.9rem; }
.back-to-cluster a { font-weight: 600; }

/* Breadcrumbs */
.breadcrumbs ol { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem; font-size: 0.85rem; color: var(--color-muted); }
.breadcrumbs li::after { content: "/"; margin-left: 0.5rem; color: var(--color-border); }
.breadcrumbs li:last-child::after { display: none; }

/* Buttons */
.btn { display: inline-block; padding: 0.7rem 1.2rem; border-radius: var(--radius); font-weight: 600; text-decoration: none; border: 1px solid var(--color-border); background: #fff; color: var(--color-fg); }
.btn-primary { background: var(--color-primary); color: var(--color-primary-fg); border-color: var(--color-primary); }
.btn-primary:hover { filter: brightness(1.1); }

/* Review */
.review-header { padding: 1rem 0 1.5rem; border-bottom: 1px solid var(--color-border); }
.score-badge { display: inline-flex; align-items: baseline; gap: 0.25rem; padding: 0.5rem 1rem; background: var(--color-card-bg); border-radius: var(--radius); margin: 0.5rem 0; }
.score-value { font-size: 1.75rem; font-weight: 700; }
.score-max { color: var(--color-muted); }
.score-methodology { margin-left: 0.75rem; font-size: 0.85rem; }
.last-updated { color: var(--color-muted); font-size: 0.85rem; margin: 0.25rem 0; }
.stale-warning { background: #fef3c7; padding: 0.5rem 0.75rem; border-radius: var(--radius); color: #92400e; font-size: 0.9rem; }

.summary-box { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.5rem 0; }
.summary-col { padding: 1rem; background: var(--color-card-bg); border-radius: var(--radius); }
.summary-col--best { border-left: 3px solid var(--color-success); }
.summary-col--not { border-left: 3px solid var(--color-warning); }
.summary-col ul { margin: 0; padding-left: 1.25rem; }
.see-alternatives { margin: 0.75rem 0 0; font-size: 0.9rem; }
.see-alternatives a { font-weight: 600; }

.pricing-block { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin: 1.5rem 0; }
.pricing-block .price-from { font-weight: 600; margin: 0; }
.badge { padding: 0.25rem 0.6rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; }
.badge-free { background: #dcfce7; color: #14532d; }
.badge-trial { background: #dbeafe; color: #1e3a8a; }

.review-cta { margin: 1.5rem 0; padding: 1rem; background: var(--color-card-bg); border-radius: var(--radius); }
.review-cta .btn { margin-bottom: 0.5rem; }
.affiliate-disclosure-inline { font-size: 0.8rem; color: var(--color-muted); margin: 0.25rem 0 0; }

/* Comparison */
.verdict { padding: 1rem 1.25rem; background: #ecfdf5; border-left: 4px solid var(--color-success); border-radius: var(--radius); margin: 1.5rem 0; }
.winner-line { font-size: 1.15rem; margin: 0; }
.winner-best-for { margin: 0.5rem 0 0; color: var(--color-fg); }
.compare-table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.compare-table th, .compare-table td { padding: 0.75rem; border: 1px solid var(--color-border); text-align: left; }
.compare-table thead th { background: var(--color-card-bg); }
.choose-blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 2rem 0; }
.choose-block { padding: 1.25rem; background: var(--color-card-bg); border-radius: var(--radius); }

/* Cards (pillar/cluster) */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin: 1rem 0; }
.tool-card { padding: 1.25rem; background: var(--color-card-bg); border-radius: var(--radius); display: flex; flex-direction: column; gap: 0.5rem; }
.tool-card h3 { margin: 0; }
.tool-card .btn { margin-top: auto; text-align: center; }
.tool-score { font-weight: 700; color: var(--color-primary); margin: 0; }
.tool-best-for { color: var(--color-muted); margin: 0; font-size: 0.9rem; }
.tool-card--ranked { position: relative; padding-top: 2rem; }
.rank-badge { position: absolute; top: 0.6rem; left: 0.6rem; background: var(--color-accent); color: #1f2937; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.02em; padding: 0.15rem 0.5rem; border-radius: 999px; text-transform: uppercase; }
.mini-card-grid { display: flex; flex-direction: column; gap: 0.5rem; }
.mini-card { display: flex; justify-content: space-between; padding: 0.6rem 0.9rem; background: var(--color-card-bg); border-radius: var(--radius); }
.tool-list .tool-row { display: grid; grid-template-columns: minmax(180px, 1fr) auto minmax(0, 2fr); align-items: center; gap: 1rem; padding: 0.75rem 0; border-bottom: 1px solid var(--color-border); }
.row-score { color: var(--color-muted); }
.row-use-case { color: var(--color-muted); font-size: 0.9rem; }
.cluster-cta { margin: 1.5rem 0; }
.how-to-choose { padding: 1rem 1.25rem; background: var(--color-card-bg); border-left: 3px solid var(--color-primary); border-radius: var(--radius); margin: 1.5rem 0; }
.how-to-choose h2 { margin-top: 0; border-bottom: 0; }
.how-to-choose ul { margin: 0; padding-left: 1.25rem; }

/* FAQ */
.faq-section { margin: 2.5rem 0; }
.faq-item { border-bottom: 1px solid var(--color-border); padding: 0.75rem 0; }
.faq-item summary { font-weight: 600; cursor: pointer; padding: 0.25rem 0; }
.faq-answer { padding: 0.5rem 0 0.75rem; color: var(--color-fg); }

/* Comparison lists (review + cluster) */
.review-comparisons, .category-comparisons { margin: 2rem 0; }
.comparison-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 0.75rem; }
.comparison-list li { padding: 0.75rem 1rem; background: var(--color-card-bg); border-radius: var(--radius); border-left: 3px solid var(--color-primary); }
.comparison-list a { text-decoration: none; font-weight: 600; }

/* Homepage */
.hero { padding: 3rem 1.5rem 2rem; text-align: center; }
.hero h1 { font-size: 2.5rem; margin-top: 0; }
.hero-subtitle { font-size: 1.15rem; color: var(--color-muted); max-width: 640px; margin: 0.5rem auto 1.5rem; }
.hero-ctas { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.hero-ctas .btn-disabled { background: var(--color-card-bg); color: var(--color-muted); cursor: not-allowed; display: inline-flex; align-items: center; gap: 0.4rem; }
.hero-ctas .btn-disabled small { font-size: 0.7em; padding: 0.1rem 0.4rem; background: var(--color-border); border-radius: 999px; }
.home-reviews, .home-brand, .home-stack-cta, .home-clusters { padding: 2rem 1.5rem; }
.cluster-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }
.cluster-card { display: flex; flex-direction: column; gap: 0.3rem; padding: 1.1rem 1.2rem; background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); text-decoration: none; color: var(--color-fg); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.cluster-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08); border-color: var(--color-primary); }
.cluster-card h3 { margin: 0; font-size: 1rem; }
.cluster-card__meta { margin: 0; color: var(--color-muted); font-size: 0.85rem; }
.stack-cta-card { padding: 2rem 1.75rem; background: linear-gradient(135deg, #eff6ff 0%, #faf5ff 100%); border: 1px solid var(--color-border); border-radius: var(--radius); text-align: center; }
.stack-cta-card h2 { margin: 0 0 0.5rem; border: 0; }
.stack-cta-card p { color: var(--color-muted); margin: 0 0 1.25rem; max-width: 36rem; margin-left: auto; margin-right: auto; }
.pillar-stack-cta { margin: 2rem 0; text-align: center; }
.brand-links { display: flex; gap: 2rem; flex-wrap: wrap; }
.brand-links a { font-weight: 600; }
.empty-state { color: var(--color-muted); font-style: italic; }

/* Cookie consent */
.cookie-banner { position: fixed; left: 1rem; right: 1rem; bottom: 1rem; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15); padding: 1rem 1.25rem; z-index: 100; }
.cookie-banner[hidden] { display: none; }
.cookie-banner__inner { display: grid; gap: 0.75rem; grid-template-columns: 1fr auto; align-items: center; max-width: var(--max-width); margin: 0 auto; }
.cookie-banner__text { margin: 0; font-size: 0.92rem; color: var(--color-fg); }
.cookie-banner__actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.btn-ghost { background: transparent; border: 1px solid var(--color-border); color: var(--color-fg); padding: 0.5rem 0.85rem; border-radius: var(--radius); cursor: pointer; font-weight: 500; font-family: inherit; }
.btn-ghost:hover { background: var(--color-card-bg); }

.cookie-modal { border: 0; border-radius: var(--radius); padding: 1.5rem 1.5rem 1.75rem; max-width: min(94vw, 480px); width: 100%; background: #fff; color: var(--color-fg); font-family: inherit; box-shadow: 0 24px 56px rgba(15, 23, 42, 0.2); }
.cookie-modal::backdrop { background: rgba(15, 23, 42, 0.45); }
.cookie-modal .modal-close { position: absolute; top: 0.6rem; right: 0.85rem; background: transparent; border: 0; font-size: 1.6rem; line-height: 1; cursor: pointer; color: var(--color-muted); padding: 0.25rem 0.5rem; }
.cookie-modal__title { margin: 0 0 1rem; border-bottom: 0; }
.cookie-pref { border: 1px solid var(--color-border); border-radius: 12px; padding: 0.75rem 1rem; margin: 0 0 0.75rem; }
.cookie-pref legend { font-weight: 600; padding: 0 0.4rem; font-size: 0.95rem; }
.cookie-pref label { display: flex; gap: 0.6rem; align-items: flex-start; font-size: 0.9rem; color: var(--color-muted); cursor: pointer; }
.cookie-pref input[type="checkbox"] { margin-top: 0.2rem; }
.cookie-modal__actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1rem; }

@media (max-width: 600px) {
  .cookie-banner__inner { grid-template-columns: 1fr; }
  .cookie-banner__actions { justify-content: stretch; }
  .cookie-banner__actions .btn { flex: 1 1 auto; text-align: center; }
}

/* Stack Builder quiz */
.stack-header { padding: 1.5rem 0 1rem; }
.stack-subtitle { color: var(--color-muted); font-size: 1.05rem; }
.stack-quiz { display: grid; gap: 1.25rem; max-width: 720px; margin: 1rem 0 2rem; }
.stack-step { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1rem 1.25rem; }
.stack-step legend { font-weight: 600; padding: 0 0.4rem; font-size: 1rem; }
.stack-step label { display: flex; gap: 0.6rem; align-items: center; padding: 0.4rem 0; cursor: pointer; }
.stack-step input[type="radio"] { accent-color: var(--color-primary); }
.stack-submit { justify-self: start; }
.stack-results { margin: 1.5rem 0 3rem; }
.stack-results__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1rem 0; }
.stack-card { display: flex; flex-direction: column; gap: 0.4rem; padding: 1.1rem 1.2rem; background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); text-decoration: none; color: var(--color-fg); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.stack-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08); }
.stack-card__role { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-primary); }
.stack-card__name { margin: 0; font-size: 1.1rem; }
.stack-card__score { margin: 0; color: var(--color-muted); font-size: 0.9rem; }
.stack-card__cta { margin-top: auto; font-weight: 600; color: var(--color-primary); }
.stack-results__note { color: var(--color-muted); font-size: 0.9rem; }
.stack-restart { margin-top: 0.75rem; }

/* Alternatives page */
.alt-tier { display: inline-block; margin-left: 0.5rem; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.02em; padding: 0.1rem 0.5rem; border-radius: 999px; text-transform: uppercase; vertical-align: middle; }
.alt-tier--budget     { background: #dcfce7; color: #14532d; }
.alt-tier--value      { background: #dbeafe; color: #1e3a8a; }
.alt-tier--premium    { background: #fef3c7; color: #92400e; }
.alt-tier--enterprise { background: #fae8ff; color: #581c87; }
.alt-pain ul, .alt-best-by-use-case ul { padding-left: 1.25rem; margin: 0.5rem 0; }
.alt-deep-dive { padding: 1.25rem; background: var(--color-card-bg); border-radius: var(--radius); border-left: 3px solid var(--color-primary); margin: 1.25rem 0; }
.alt-deep-dive--budget { border-left-color: var(--color-success); }
.alt-deep-dive--enterprise { border-left-color: var(--color-accent); }
.alt-stack-cta { margin: 2rem 0; text-align: center; }
.cluster-stack-cta { margin: 2rem 0; text-align: center; }

@media (max-width: 768px) {
  .stack-results__grid { grid-template-columns: 1fr; }
}

/* Mobile */
@media (max-width: 768px) {
  .site-header .container { flex-direction: column; gap: 0.5rem; }
  .summary-box, .choose-blocks, .card-grid { grid-template-columns: 1fr; }
  .compare-table { font-size: 0.9rem; }
}