/* EntryCert marketing site — self-contained, zero external requests.
   System font stack, navy/blue port palette, light + dark via prefers-color-scheme. */

:root {
  /* Brand */
  --navy: #0b2a4a;
  --navy-deep: #071c33;
  --accent: #2f6fed;
  --accent-strong: #1f5ad4;
  --mark-bg: #2f6fed;

  /* Light theme surfaces + text */
  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --bg-band: #ffffff;
  --surface: #ffffff;
  --border: #e2e8f2;
  --ink: #10233b;        /* body text — AA on --bg */
  --ink-soft: #4a5b70;   /* secondary text — AA on --bg */
  --ink-invert: #ffffff;
  --hero-bg-1: #0b2a4a;
  --hero-bg-2: #123a63;
  --hero-ink: #eaf1fb;
  --hero-ink-soft: #b7cdec;
  --focus: #1f5ad4;

  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a1826;
    --bg-alt: #0e2035;
    --bg-band: #0a1826;
    --surface: #10243b;
    --border: #1e3450;
    --ink: #e7eefa;
    --ink-soft: #a7bad4;
    --ink-invert: #ffffff;
    --hero-bg-1: #0a1c30;
    --hero-bg-2: #123351;
    --hero-ink: #eaf1fb;
    --hero-ink-soft: #b7cdec;
    --accent: #5b93ff;
    --accent-strong: #3f7bf0;
    --mark-bg: #3f7bf0;
    --focus: #7aa8ff;
  }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.2; color: var(--ink); margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.15rem); font-weight: 750; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.15rem); font-weight: 700; }
h3 { font-size: 1.18rem; font-weight: 650; }
p { margin: 0 0 1rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Visible keyboard focus everywhere */
a:focus-visible, button:focus-visible, summary:focus-visible, .btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--navy); color: #fff; padding: 10px 16px; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-weight: 600; font-size: 1rem;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .04s ease, background-color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 15px; font-size: 0.95rem; }

.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }

.btn-secondary {
  background: transparent; color: var(--accent); border-color: var(--accent);
}
.btn-secondary:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }

.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* On the dark hero, keep secondary button legible */
.hero .btn-secondary { color: var(--hero-ink); border-color: var(--hero-ink-soft); }
.hero .btn-secondary:hover { background: rgba(255,255,255,0.10); border-color: var(--hero-ink); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand-mark { display: block; flex: none; }
.brand-word { font-size: 1.18rem; letter-spacing: -0.02em; }
.brand-sm .brand-word { font-size: 1.05rem; }

.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { color: var(--ink-soft); font-weight: 550; font-size: 0.97rem; }
.site-nav a:hover { color: var(--ink); text-decoration: none; }
.site-nav a.btn { color: var(--ink); }
.site-nav a.btn:hover { color: var(--accent); }

@media (max-width: 640px) {
  .site-nav a:not(.btn) { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(1200px 500px at 78% -10%, var(--hero-bg-2), transparent 60%),
              linear-gradient(160deg, var(--hero-bg-1), var(--navy-deep));
  color: var(--hero-ink);
  padding: clamp(56px, 9vw, 104px) 0 clamp(52px, 8vw, 92px);
}
.hero h1 { color: #fff; max-width: 16ch; }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: 0.12em;
  font-size: 0.76rem; font-weight: 700; color: var(--hero-ink-soft);
  border: 1px solid rgba(255,255,255,0.22); padding: 5px 12px; border-radius: 999px;
  margin: 0 0 22px;
}
.lede { font-size: clamp(1.06rem, 2vw, 1.3rem); color: var(--hero-ink); max-width: 62ch; margin-bottom: 30px; }
.lede em { color: #fff; font-style: italic; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.cta-row-center { justify-content: center; }
.hero-note { margin-top: 26px; color: var(--hero-ink-soft); font-size: 0.95rem; max-width: 58ch; }

/* ---------- Bands ---------- */
.band { padding: clamp(52px, 8vw, 88px) 0; background: var(--bg-band); }
.band.alt { background: var(--bg-alt); }

.section-head { max-width: 62ch; margin-bottom: 42px; }
.kicker { text-transform: uppercase; letter-spacing: 0.11em; font-size: 0.78rem; font-weight: 700; color: var(--accent); margin: 0 0 10px; }
.section-sub { color: var(--ink-soft); font-size: 1.05rem; margin: 0; }

/* Mandate */
.mandate { max-width: 68ch; font-size: 1.08rem; }
.mandate strong { color: var(--ink); }
.source-line { font-size: 0.86rem; color: var(--ink-soft); border-top: 1px solid var(--border); padding-top: 16px; margin-top: 6px; }

/* Features */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
@media (max-width: 720px) { .features { grid-template-columns: 1fr; } }
.feature {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 26px 24px;
}
.feature:last-child { grid-column: 1 / -1; }
@media (max-width: 720px) { .feature:last-child { grid-column: auto; } }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--ink-soft); margin: 0; font-size: 1rem; }
.feature-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 11px; margin-bottom: 16px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}

/* Steps */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  counter-reset: step;
}
@media (max-width: 780px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-top: 6px; }
.step h3 { margin: 14px 0 6px; }
.step p { color: var(--ink-soft); font-size: 0.98rem; margin: 0; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 1.05rem;
}

/* FAQ */
.faq { max-width: 74ch; }
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); margin-bottom: 12px; overflow: hidden;
}
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 22px;
  font-weight: 600; font-size: 1.05rem; color: var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-weight: 400; font-size: 1.5rem; color: var(--accent); line-height: 1; flex: none;
}
.faq details[open] summary::after { content: "\2013"; }
.faq-body { padding: 0 22px 20px; }
.faq-body p { color: var(--ink-soft); margin: 0; }

/* Final CTA */
.cta-band { background: linear-gradient(160deg, var(--hero-bg-1), var(--navy-deep)); color: var(--hero-ink); }
.cta-wrap { text-align: center; max-width: 60ch; }
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--hero-ink-soft); font-size: 1.08rem; margin-bottom: 26px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-deep); color: #cdddf2; padding: 44px 0; }
.footer-inner { display: grid; gap: 12px; }
.site-footer .brand, .site-footer .brand-word { color: #fff; }
.footer-tag { color: #9db8d6; margin: 0; font-size: 0.98rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; margin: 6px 0; }
.footer-links a { color: #cdddf2; font-size: 0.95rem; }
.footer-links a:hover { color: #fff; }
.copyright { color: #7f9cbd; font-size: 0.85rem; margin: 8px 0 0; }