:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-accent: #1976d2;
  --color-accent-soft: #90caf9;
  --color-accent-bg: #e3f2fd;
  --color-warn-bg: #fff7ed;
  --color-warn-fg: #b45309;
  --color-good-bg: #ecfdf5;
  --color-good-fg: #047857;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-strong: 0 10px 30px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  --space: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #eef2f7 100%);
  color: var(--color-text);
  line-height: 1.55;
  min-height: 100vh;
}

a { color: var(--color-accent); }

.landing-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.landing-hero {
  margin-bottom: 40px;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
}

.landing-hero h1 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  margin: 8px 0 12px;
  letter-spacing: -0.01em;
}

.landing-hero p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-muted);
  max-width: 680px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-card); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

.section-title {
  margin: 48px 0 16px;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.poc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.poc-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--color-border);
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}
.poc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
  border-color: var(--color-accent-soft);
}

.poc-card .badge {
  align-self: flex-start;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.poc-card h3 { margin: 0; font-size: 1.2rem; }
.poc-card p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }

.poc-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.tag {
  font-size: 0.72rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2px 8px;
  color: var(--color-muted);
}
.tag.tag-good { background: var(--color-good-bg); border-color: #a7f3d0; color: var(--color-good-fg); }
.tag.tag-warn { background: var(--color-warn-bg); border-color: #fed7aa; color: var(--color-warn-fg); }

.landing-footer {
  margin-top: 56px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ----------- comparison page ----------- */

.comparison-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.comparison-shell h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}
.comparison-shell .lede {
  margin: 0 0 28px;
  color: var(--color-muted);
  max-width: 760px;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-bottom: 36px;
  font-size: 0.92rem;
}
.compare-table th, .compare-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.compare-table thead th {
  background: var(--color-bg);
  font-size: 0.95rem;
  font-weight: 700;
}
.compare-table thead th:first-child {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody th {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
  color: var(--color-muted);
  width: 200px;
  font-weight: 600;
}
.compare-table strong { color: var(--color-text); }
.compare-table code {
  background: var(--color-bg);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.8em;
}

.proscons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 36px;
}
.proscons-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}
.proscons-card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.proscons-card .alt-tag {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
}
.proscons-card ul { margin: 6px 0 14px; padding-left: 20px; }
.proscons-card li { margin: 4px 0; font-size: 0.9rem; }
.proscons-card .pros li::marker { color: var(--color-good-fg); }
.proscons-card .cons li::marker { color: #b91c1c; }
.proscons-card h4 {
  margin: 12px 0 4px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.recommendation-box {
  background: var(--color-accent-bg);
  border: 1px solid #bbdefb;
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 28px;
}
.recommendation-box h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.recommendation-box p { margin: 4px 0; color: var(--color-text); }

.compare-footer {
  font-size: 0.85rem;
  color: var(--color-muted);
}
.compare-footer a { color: var(--color-accent); }

@media print {
  body { background: #fff; }
  .compare-table { box-shadow: none; }
  .proscons-card { break-inside: avoid; box-shadow: none; }
  .btn-primary { background: #fff; color: #000; border: 1px solid #000; }
}