:root {
  --color-primary: #0f766e;
  --color-primary-hover: #115e59;
  --color-primary-light: #14b8a6;
  --color-page-bg: #f8f9fa;
  --color-card-bg: #ffffff;
  --color-border: #e2e8f0;
  --color-border-soft: #eef1f4;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;
  --color-focus-ring: #3b82f6;
  --color-success: #16a34a;

  --tag-keyword-bg: #fee2e2;
  --tag-keyword-text: #991b1b;
  --tag-keyword-border: #fca5a5;
  --tag-author-bg: #fef3c7;
  --tag-author-text: #92400e;
  --tag-author-border: #fcd34d;
  --tag-topic-bg: #ccfbf1;
  --tag-topic-text: #115e59;
  --tag-topic-border: #5eead4;

  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 999px;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --content-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-family);
  color: var(--color-text-secondary);
  background: var(--color-page-bg);
  line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

img, svg { max-width: 100%; display: block; }

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-card-bg);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--color-text);
}

.brand:hover { color: var(--color-text); text-decoration: none; }

.brand-badge {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-badge svg { width: 17px; height: 17px; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 600;
}

.site-nav-links a { color: var(--color-text-secondary); }
.site-nav-links a:hover { color: var(--color-primary); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; text-decoration: none; }

.btn-ghost { background: transparent; color: var(--color-primary); border-color: var(--color-border-strong); }
.btn-ghost:hover { background: var(--color-border-soft); color: var(--color-primary-hover); text-decoration: none; }

/* ---------- Hero ---------- */

.hero {
  padding: 88px 0 72px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

.hero .lede {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.hero-note {
  font-size: 13px;
  color: var(--color-text-faint);
  font-weight: 600;
}

/* ---------- Sections ---------- */

section { padding: 64px 0; }

.section-eyebrow {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.section-header { text-align: center; max-width: 640px; margin: 0 auto 44px; }

.section-header h2 {
  font-size: clamp(24px, 3.5vw, 30px);
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 12px;
}

.section-header p { color: var(--color-text-muted); margin: 0; font-size: 15.5px; }

/* ---------- Feature cards ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.feature-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  border: 1px solid;
  margin-bottom: 14px;
}

.feature-tag.keyword { background: var(--tag-keyword-bg); color: var(--tag-keyword-text); border-color: var(--tag-keyword-border); }
.feature-tag.author { background: var(--tag-author-bg); color: var(--tag-author-text); border-color: var(--tag-author-border); }
.feature-tag.topic { background: var(--tag-topic-bg); color: var(--tag-topic-text); border-color: var(--tag-topic-border); }

.feature-card h3 { font-size: 17px; font-weight: 700; color: var(--color-text); margin: 0 0 8px; }
.feature-card p { font-size: 14px; color: var(--color-text-muted); margin: 0; }

.feature-grid.secondary { grid-template-columns: repeat(2, 1fr); margin-top: 20px; }

/* ---------- Privacy callout ---------- */

.privacy-callout {
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.privacy-callout .icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.privacy-callout .icon svg { width: 22px; height: 22px; }

.privacy-callout h3 { font-size: 19px; font-weight: 800; color: var(--color-primary-hover); margin: 0 0 8px; }
.privacy-callout p { margin: 0; color: var(--color-text-secondary); font-size: 15px; }

/* ---------- Steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.step .num {
  counter-increment: step;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-border-soft);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.step .num::before { content: counter(step); }

.step h3 { font-size: 16px; font-weight: 700; color: var(--color-text); margin: 0 0 6px; }
.step p { font-size: 14px; color: var(--color-text-muted); margin: 0; }

/* ---------- Final CTA ---------- */

.final-cta {
  text-align: center;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  color: #fff;
}

.final-cta h2 { font-size: clamp(24px, 3.5vw, 30px); font-weight: 800; margin: 0 0 12px; }
.final-cta p { color: rgba(255,255,255,0.85); margin: 0 0 28px; font-size: 15.5px; }
.final-cta .btn-primary { background: #fff; color: var(--color-primary); }
.final-cta .btn-primary:hover { background: var(--color-border-soft); color: var(--color-primary-hover); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border-soft);
  padding: 32px 0;
  margin-top: 24px;
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-faint);
}

.site-footer nav { display: flex; gap: 20px; }
.site-footer a { color: var(--color-text-muted); font-weight: 600; }
.site-footer a:hover { color: var(--color-primary); }

/* ---------- Legal / policy page ---------- */

.legal {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 760px;
  margin: 48px auto;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.legal h1 { font-size: 28px; font-weight: 800; color: var(--color-text); margin: 0 0 6px; }
.legal .effective-date { font-size: 13px; color: var(--color-text-faint); font-weight: 600; margin-bottom: 28px; }
.legal h2 { font-size: 17px; font-weight: 700; color: var(--color-text); margin: 32px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--color-border-soft); }
.legal p, .legal li { font-size: 15px; color: var(--color-text-secondary); }
.legal ul { padding-left: 20px; }
.legal li { margin-bottom: 8px; }

/* ---------- Responsive ---------- */

@media (max-width: 800px) {
  .site-nav-links { display: none; }
  .feature-grid, .feature-grid.secondary, .steps { grid-template-columns: 1fr; }
  .privacy-callout { flex-direction: column; }
  .legal { padding: 28px 22px; margin: 24px auto; }
}