/* ADYield marketing site — mirrors the app design system (doc 06).
   Calm bones, one deep-blue accent, light + dark, system font. */

:root {
  --blue-deep: #0A2F66;
  --blue: #1E6FD6;
  --blue-on: #FAFBFF;
  --positive: #1D9E75;
  --bg: #FFFFFF;
  --bg-alt: #F4F6FA;
  --card: #FFFFFF;
  --text: #1A1C20;
  --text-2: #5A6270;
  --border: #E3E7EE;
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --blue-deep: #0D3A7E;
    --blue: #3E86E8;
    --bg: #0E1116;
    --bg-alt: #161B23;
    --card: #1A2029;
    --text: #F2F4F8;
    --text-2: #9AA3B2;
    --border: #2A313D;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

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

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--blue-deep); color: var(--blue-on);
  padding: 8px 16px; border-radius: 0 0 8px 0; z-index: 10;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark { border-radius: 8px; }
.brand-name { font-weight: 600; font-size: 1.1rem; letter-spacing: -0.01em; }
.site-nav { display: flex; gap: 22px; }
.site-nav a { color: var(--text-2); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover { color: var(--text); }

/* Hero */
.hero { background: var(--bg-alt); }
.hero-inner {
  display: grid; grid-template-columns: 1fr; gap: 40px;
  padding: 56px 20px 64px; align-items: center;
}
@media (min-width: 820px) {
  .hero-inner { grid-template-columns: 1.1fr 0.9fr; padding-top: 80px; padding-bottom: 88px; }
}
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 16px;
}
.hero p.lede { font-size: 1.15rem; color: var(--text-2); margin: 0 0 28px; max-width: 34em; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn-appstore {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--blue-deep); color: var(--blue-on);
  text-decoration: none; font-weight: 600;
  padding: 13px 22px; border-radius: 14px; font-size: 1rem;
}
.btn-appstore:hover { background: var(--blue); }
.btn-appstore.is-disabled { opacity: 0.85; cursor: default; }
.btn-appstore .sub { display: block; font-size: 0.7rem; font-weight: 400; opacity: 0.85; }
.cta-note { font-size: 0.85rem; color: var(--text-2); }

.trust-line { margin-top: 26px; display: flex; gap: 8px; align-items: flex-start; color: var(--text-2); font-size: 0.9rem; max-width: 34em; }
.trust-line svg { flex: none; margin-top: 3px; }

/* Phone mock */
.phone-wrap { display: flex; justify-content: center; }
.phone {
  width: 300px; border-radius: 44px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(10, 47, 102, 0.18);
  padding: 14px; position: relative;
}
.phone-screen { border-radius: 32px; overflow: hidden; background: var(--bg); }
.mock-caption { text-align: center; font-size: 0.78rem; color: var(--text-2); margin-top: 14px; }

.mock-band {
  background: var(--blue-deep); color: var(--blue-on);
  padding: 22px 18px 18px;
}
.mock-band .band-label { font-size: 0.72rem; opacity: 0.8; }
.mock-band .band-value { font-size: 1.7rem; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.mock-band .band-row { display: flex; justify-content: space-between; gap: 12px; margin-top: 12px; }
.mock-band .band-cell .band-label { display: block; }
.mock-band .band-cell .cell-value { font-size: 1.05rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.est-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--positive); margin-left: 6px; vertical-align: middle; }

.mock-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px; }
.mock-tile {
  background: var(--bg-alt); border-radius: 14px; padding: 12px 14px;
}
.mock-tile .t-label { font-size: 0.7rem; color: var(--text-2); }
.mock-tile .t-value { font-size: 1rem; font-weight: 600; font-variant-numeric: tabular-nums; }

.mock-spark { padding: 0 14px 18px; }
.mock-spark .s-label { font-size: 0.7rem; color: var(--text-2); margin-bottom: 4px; }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-alt); }
.section-head { max-width: 620px; margin: 0 0 40px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.015em; margin: 0 0 10px; }
.section-head p { color: var(--text-2); margin: 0; }

.features-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}
.feature {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.feature .f-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--blue-deep); color: var(--blue-on);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.feature h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--text-2); font-size: 0.95rem; }

/* Trust */
.trust-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.trust-item { display: flex; gap: 14px; align-items: flex-start; }
.trust-item svg { flex: none; margin-top: 2px; color: var(--positive); }
.trust-item h3 { margin: 0 0 4px; font-size: 1rem; }
.trust-item p { margin: 0; color: var(--text-2); font-size: 0.95rem; }

/* FAQ */
.faq-list { max-width: 720px; }
.faq-list details {
  border: 1px solid var(--border); border-radius: 14px;
  padding: 0 20px; margin-bottom: 12px; background: var(--card);
}
.faq-list summary {
  cursor: pointer; font-weight: 600; padding: 16px 0;
  list-style: none; position: relative; padding-right: 28px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: 2px; top: 50%;
  transform: translateY(-50%); color: var(--text-2); font-size: 1.2rem;
}
.faq-list details[open] summary::after { content: "\2212"; }
.faq-list details p { margin: 0 0 16px; color: var(--text-2); }

/* Legal pages */
.legal { max-width: 760px; padding: 48px 20px 72px; margin: 0 auto; }
.legal h1 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); letter-spacing: -0.02em; }
.legal h2 { font-size: 1.25rem; margin-top: 2.2em; }
.legal p, .legal li { color: var(--text-2); }
.legal .updated { font-size: 0.9rem; color: var(--text-2); }

/* Forms */
.form-grid { max-width: 560px; display: grid; gap: 16px; }
.form-grid label { font-weight: 600; font-size: 0.95rem; display: block; margin-bottom: 6px; }
.form-grid input[type="text"],
.form-grid input[type="email"],
.form-grid textarea {
  width: 100%; padding: 12px 14px; font: inherit;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--card); color: var(--text);
}
.form-grid input:focus, .form-grid textarea:focus {
  outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue);
}
.form-grid textarea { min-height: 150px; resize: vertical; }
.btn-primary {
  background: var(--blue-deep); color: var(--blue-on);
  border: 0; font: inherit; font-weight: 600;
  padding: 13px 26px; border-radius: 14px; cursor: pointer;
}
.btn-primary:hover { background: var(--blue); }
.form-note { font-size: 0.85rem; color: var(--text-2); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.notice { border-radius: 14px; padding: 14px 18px; margin: 0 0 24px; max-width: 560px; }
.notice.ok { background: rgba(29, 158, 117, 0.12); color: var(--positive); border: 1px solid rgba(29, 158, 117, 0.35); }
.notice.err { background: rgba(226, 75, 74, 0.1); color: #C43C3C; border: 1px solid rgba(226, 75, 74, 0.3); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-alt); margin-top: 0; }
.footer-inner {
  display: grid; gap: 32px; padding: 44px 20px 24px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .footer-inner { grid-template-columns: 2fr 1fr; } }
.footer-tag { color: var(--text-2); margin: 6px 0 12px; }
.footer-legal { color: var(--text-2); font-size: 0.8rem; max-width: 44em; margin: 0; }
.footer-nav { display: grid; gap: 10px; align-content: start; }
.footer-nav a { color: var(--text-2); text-decoration: none; font-size: 0.95rem; }
.footer-nav a:hover { color: var(--text); }
.footer-copy { padding-bottom: 28px; }
.footer-copy p { color: var(--text-2); font-size: 0.85rem; margin: 0; }