/* MailChecked marketing — brand tokens mirrored from app.mailchecked.com */
:root {
  --color-bg: #f1f5f9;
  --color-fg: #0f172a;
  --color-muted: #f8fafc;
  --color-muted-fg: #64748b;
  --color-border: #e2e8f0;
  --color-ring: #6366f1;
  --color-surface: #ffffff;

  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-on-primary: #ffffff;

  --color-ui-border: color-mix(in srgb, var(--color-primary) 17%, var(--color-border));
  --color-ui-hover: color-mix(in srgb, var(--color-primary) 9%, var(--color-muted));

  --color-accent: #a3e635;
  --color-accent-fg: #111827;

  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-neutral-status: #6b7280;

  --font-sans:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono:
    ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --radius: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --container: 1120px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv01", "cv02", "cv03", "cv04", "cv11";
}

::selection { background: var(--color-primary); color: var(--color-on-primary); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

button:focus-visible,
[role="button"]:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: var(--radius);
}

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

h1, h2, h3, h4 { color: var(--color-fg); line-height: 1.2; margin: 0 0 0.5em; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; color: var(--color-fg); }
.muted { color: var(--color-muted-fg); }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

code {
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

pre {
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  line-height: 1.5;
}

pre code { background: none; border: 0; padding: 0; }

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section { padding: 4.5rem 0; }
.section-tight { padding: 2.75rem 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-weight: 700; color: var(--color-fg); font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-on-primary); font-size: 0.85rem; font-weight: 700;
}
.nav { display: flex; align-items: center; gap: 1.6rem; }
.nav a { color: var(--color-fg); font-size: 0.92rem; font-weight: 500; }
.nav a:hover { color: var(--color-primary); }
.nav-cta { display: flex; align-items: center; gap: 0.6rem; }

.nav-toggle {
  display: none;
  background: transparent; border: 1px solid var(--color-ui-border);
  border-radius: var(--radius); padding: 0.45rem 0.55rem;
  cursor: pointer; color: var(--color-fg);
}

@media (max-width: 820px) {
  .nav { display: none; }
  .nav.open {
    display: flex; flex-direction: column; align-items: flex-start;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem; gap: 1rem;
  }
  .nav-cta { width: 100%; flex-direction: column; align-items: stretch; }
  .nav-toggle { display: inline-flex; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.45rem;
  padding: 0.62rem 1.05rem;
  font-size: 0.92rem; font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease, transform 80ms ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-on-primary); }
.btn-outline { background: transparent; color: var(--color-fg); border-color: var(--color-ui-border); }
.btn-outline:hover { background: var(--color-ui-hover); color: var(--color-fg); }
.btn-ghost { background: transparent; color: var(--color-fg); }
.btn-ghost:hover { background: var(--color-ui-hover); }
.btn-lg { padding: 0.8rem 1.3rem; font-size: 1rem; }

/* Hero */
.hero {
  padding: 5.5rem 0 3.5rem;
  text-align: center;
}
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  color: var(--color-muted-fg);
  padding: 0.35rem 0.75rem; border-radius: 999px;
  font-size: 0.82rem; font-weight: 500; margin-bottom: 1.25rem;
}
.hero .eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--color-success);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-success) 18%, transparent);
}
.hero h1 { max-width: 22ch; margin-left: auto; margin-right: auto; }
.hero .lede {
  font-size: 1.15rem; color: var(--color-muted-fg);
  max-width: 60ch; margin: 0.6rem auto 1.8rem;
}
.hero-cta {
  display: flex; gap: 0.7rem;
  flex-wrap: wrap; justify-content: center; align-items: center;
}
.hero-meta {
  margin-top: 1.6rem; color: var(--color-muted-fg); font-size: 0.9rem;
  display: flex; gap: 1.2rem 1.5rem;
  flex-wrap: wrap; justify-content: center; align-items: center;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }
.hero-meta .check { color: var(--color-success); font-weight: 700; }

/* Cards / grids */
.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 920px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
}
.card h3 { margin-top: 0.2rem; }
.card .icon,
.icon-tile {
  width: 40px; height: 40px; border-radius: 10px;
  background: color-mix(in srgb, var(--color-primary) 11%, var(--color-surface));
  color: var(--color-primary);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700;
  margin-bottom: 0.95rem;
  border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
}
.icon svg, .icon-tile svg {
  width: 20px; height: 20px;
  stroke: currentColor; fill: none;
  stroke-width: 1.8;
  stroke-linecap: round; stroke-linejoin: round;
}

/* Section heading */
.section-head { text-align: center; max-width: 60ch; margin: 0 auto 2.5rem; }
.section-head p { color: var(--color-muted-fg); font-size: 1.05rem; }

/* Stat cards */
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 1.35rem 1.2rem;
  box-shadow: var(--shadow-sm);
  text-align: center;
  display: flex; flex-direction: column; align-items: center;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-primary) 32%, var(--color-border));
}
.stat-card .icon-tile { margin-bottom: 0.75rem; }
.stat-card .num {
  font-size: 1.75rem; font-weight: 700;
  color: var(--color-fg); line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat-card .lbl {
  font-size: 0.85rem; color: var(--color-muted-fg);
  margin-top: 0.3rem;
}

/* Pricing */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}
@media (max-width: 920px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: 0.9rem;
}
.price-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  position: relative;
}
.price-card.featured::after {
  content: "Most popular";
  position: absolute; top: -10px; right: 14px;
  background: var(--color-primary); color: var(--color-on-primary);
  font-size: 0.72rem; font-weight: 600;
  padding: 0.18rem 0.55rem; border-radius: 999px;
}
.price-amount { font-size: 2rem; font-weight: 700; line-height: 1; }
.price-amount .per { font-size: 0.95rem; color: var(--color-muted-fg); font-weight: 500; }
.price-credits { color: var(--color-muted-fg); font-size: 0.92rem; }
.price-features { list-style: none; padding: 0; margin: 0.2rem 0 0; display: grid; gap: 0.4rem; }
.price-features li { font-size: 0.92rem; color: var(--color-fg); display: flex; gap: 0.5rem; }
.price-features li::before { content: "✓"; color: var(--color-success); font-weight: 700; }

/* Pricing table (volume tiers) */
.price-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.price-table th, .price-table td {
  padding: 0.85rem 1rem; text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}
.price-table th { background: var(--color-muted); font-weight: 600; color: var(--color-muted-fg); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }
.price-table tr:last-child td { border-bottom: 0; }
.price-table td.num, .price-table th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Callout */
.callout {
  background: color-mix(in srgb, var(--color-primary) 6%, var(--color-surface));
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.6rem;
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: var(--color-on-primary);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
}
.cta-band h2 { color: var(--color-on-primary); }
.cta-band p { color: color-mix(in srgb, var(--color-on-primary) 88%, transparent); }
.cta-band .btn-primary {
  background: var(--color-on-primary); color: var(--color-primary);
}
.cta-band .btn-primary:hover { background: #f1f5f9; color: var(--color-primary-hover); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-grid h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-muted-fg); margin-bottom: 0.7rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.footer-grid a { color: var(--color-fg); }
.footer-grid a:hover { color: var(--color-primary); }
.footer-tagline { color: var(--color-muted-fg); max-width: 30ch; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.2rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem;
  color: var(--color-muted-fg);
}
@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* Legal / docs page */
.prose {
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 2.2rem 2.4rem;
  box-shadow: var(--shadow-sm);
}
.prose h1 { font-size: 2rem; }
.prose h2 { font-size: 1.4rem; margin-top: 2rem; }
.prose h3 { font-size: 1.1rem; margin-top: 1.4rem; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin: 0.3rem 0; }
.prose hr { border: 0; border-top: 1px solid var(--color-border); margin: 2rem 0; }
.prose a { text-decoration: underline; text-decoration-color: var(--color-ui-border); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--color-primary); }
.prose .meta { color: var(--color-muted-fg); font-size: 0.9rem; margin-bottom: 1.2rem; }

@media (max-width: 720px) {
  .prose { padding: 1.5rem 1.3rem; }
}

/* Page heading shared block */
.page-head {
  text-align: center; padding: 4rem 0 2rem;
}
.page-head p { color: var(--color-muted-fg); font-size: 1.1rem; max-width: 60ch; margin: 0.4rem auto 0; }

/* Inline nav for legal pages */
.legal-nav {
  display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: center;
  margin: 1.5rem 0 0;
}
.legal-nav a {
  font-size: 0.85rem; color: var(--color-muted-fg);
  background: var(--color-surface); border: 1px solid var(--color-border);
  padding: 0.35rem 0.75rem; border-radius: 999px;
}
.legal-nav a:hover { color: var(--color-primary); border-color: var(--color-ui-border); }
.legal-nav a.current { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); }

/* FAQ */
details.faq {
  background: var(--color-surface);
  border: 1px solid var(--color-ui-border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 0.6rem;
}
details.faq[open] { box-shadow: var(--shadow-sm); }
details.faq summary {
  cursor: pointer; font-weight: 600; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; font-size: 1.3rem; color: var(--color-muted-fg); margin-left: 1rem;
}
details.faq[open] summary::after { content: "−"; }
details.faq p { margin: 0.7rem 0 0; color: var(--color-muted-fg); }

/* Code block w/ caption (docs) */
.code-block { margin: 1rem 0 1.5rem; }
.code-block .label {
  display: inline-block; font-size: 0.75rem; font-weight: 600;
  color: var(--color-muted-fg); text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

/* Endpoint pill */
.endpoint {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono); font-size: 0.95rem;
  background: var(--color-muted); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 0.35rem 0.65rem;
}
.endpoint .method {
  font-weight: 700; padding: 0.05rem 0.45rem; border-radius: 4px;
  background: var(--color-primary); color: var(--color-on-primary);
  font-size: 0.78rem; letter-spacing: 0.04em;
}

/* Utility */
.center { text-align: center; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; } .mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.gap-2 { gap: 0.6rem; }
.justify-center { justify-content: center; }