:root {
  --beltrow-black: #050508;
  --beltrow-blue: #2d65e8;
  --beltrow-blue-deep: #1e4a9c;
  --beltrow-coral: #f26444;
  --beltrow-cream: #f0d4c0;
  --beltrow-lavender: #7b6aed;
  --beltrow-mist: #c8c2b8;
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 14px;
  --radius-sm: 8px;

  color-scheme: dark;
  --bg-page: #050508;
  --bg-card: rgba(14, 16, 23, 0.94);
  --bg-card-hover: rgba(18, 21, 30, 0.98);
  --bg-surface: rgba(13, 15, 21, 0.94);
  --bg-chip: rgba(255, 255, 255, 0.05);
  --bg-cta: var(--beltrow-cream);
  --bg-cta-hover: #f6e0d1;
  --text-1: #f4f1ec;
  --text-2: #c6beb4;
  --text-3: #938a81;
  --text-cta: #17120f;
  --border: rgba(240, 212, 192, 0.12);
  --border-strong: rgba(240, 212, 192, 0.18);
  --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.24);
  --shadow-card-hover: 0 26px 52px rgba(0, 0, 0, 0.32);
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg-page: #f6f1e9;
    --bg-card: rgba(255, 252, 247, 0.96);
    --bg-card-hover: rgba(255, 255, 255, 0.99);
    --bg-surface: rgba(255, 251, 246, 0.96);
    --bg-chip: rgba(23, 19, 16, 0.05);
    --bg-cta: #18202f;
    --bg-cta-hover: #111827;
    --text-1: #18120f;
    --text-2: #5d564d;
    --text-3: #8b7d71;
    --text-cta: #f9f4ef;
    --border: rgba(38, 45, 61, 0.12);
    --border-strong: rgba(38, 45, 61, 0.16);
    --shadow-card: 0 16px 34px rgba(68, 51, 31, 0.08);
    --shadow-card-hover: 0 22px 44px rgba(68, 51, 31, 0.12);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-page);
  color: var(--text-1);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.guide-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.guide-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.guide-brand {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}

.guide-brand a {
  color: inherit;
  text-decoration: none;
}

.guide-brand a:hover { color: var(--text-2); }

.guide-eyebrow {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--beltrow-blue);
  background: var(--bg-chip);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.guide-h1 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: var(--text-1);
}

.guide-subtitle {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto;
}

.guide-date {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.5rem;
}

/* Quartet grid */
.quartet-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 640px) {
  .quartet-grid { grid-template-columns: 1fr; }
}

.quartet-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 220ms ease, border-color 220ms ease, transform 220ms ease;
  display: flex;
  flex-direction: column;
}

.quartet-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.quartet-card-archetype {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--beltrow-blue);
  margin-bottom: 0.5rem;
}

.quartet-card-image-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-chip);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quartet-card-image-wrap img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
}

.quartet-card-image-fallback {
  font-size: 0.8125rem;
  color: var(--text-3);
  text-align: center;
  padding: 1rem;
}

.quartet-card-title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--text-1);
}

.quartet-card-price {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 0.5rem;
}

.quartet-card-price .currency { font-size: 0.75rem; color: var(--text-2); }

.quartet-card-bestfor {
  font-size: 0.8125rem;
  color: var(--text-2);
  margin-bottom: 0.75rem;
  flex-grow: 1;
}

.quartet-card-tradeoff {
  font-size: 0.75rem;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
  margin-bottom: 0.75rem;
}

.quartet-card-cta {
  display: block;
  text-align: center;
  background: var(--bg-cta);
  color: var(--text-cta);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.625rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  transition: background 160ms ease, transform 160ms ease;
}

.quartet-card-cta:hover {
  background: var(--bg-cta-hover);
  transform: translateY(-1px);
}

.quartet-card-cta-sub {
  display: block;
  text-align: center;
  font-size: 0.6875rem;
  color: var(--text-3);
  margin-top: 0.375rem;
}

/* Content sections */
.guide-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.guide-section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text-1);
}

.guide-section p {
  font-size: 0.875rem;
  color: var(--text-2);
  margin: 0 0 0.75rem;
  line-height: 1.65;
}

.guide-section p:last-child { margin-bottom: 0; }

.delta-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.delta-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-2);
  line-height: 1.55;
}

.delta-item:last-child { border-bottom: none; }

.delta-label {
  font-weight: 600;
  color: var(--text-1);
  text-transform: capitalize;
}

/* Try interactive link */
.guide-interactive-link {
  display: block;
  text-align: center;
  padding: 1rem;
  margin-bottom: 1.25rem;
  background: var(--bg-chip);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--beltrow-blue);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 160ms ease, border-color 160ms ease;
}

.guide-interactive-link:hover {
  background: var(--bg-surface);
  border-color: var(--border-strong);
}

/* Guide directory */
.guide-directory {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.guide-directory-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--text-1);
}

.guide-directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

.guide-directory-card {
  display: block;
  padding: 0.875rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.8125rem;
  transition: border-color 160ms ease, color 160ms ease;
}

.guide-directory-card:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
}

.guide-directory-card--current {
  border-color: var(--beltrow-blue);
  color: var(--text-1);
  pointer-events: none;
}

/* Disclosure */
.guide-disclosure {
  background: var(--bg-chip);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 2rem;
}

.guide-disclosure p {
  font-size: 0.75rem;
  color: var(--text-3);
  margin: 0;
  line-height: 1.6;
}

/* Footer */
.guide-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.guide-footer p {
  font-size: 0.75rem;
  color: var(--text-3);
  margin: 0;
}

.guide-footer a {
  color: var(--text-3);
  text-decoration: underline;
}