/* ===========================================================================
   BondCasts — marketing site styles
   Palette derived from the app icon: navy #172765 → cyan #007fa9, light #cae4f5
   Plain CSS, no build step. Dark/light aware.
   ========================================================================= */

:root {
  --navy: #172765;
  --navy-2: #1b2e73;
  --cyan: #007fa9;
  --cyan-bright: #17a3cf;
  --light-blue: #cae4f5;

  --brand-grad: linear-gradient(135deg, #1b2e73 0%, #0a5f96 55%, #007fa9 100%);

  /* dark theme (default) */
  --bg: #0a0f1e;
  --bg-soft: #0e1526;
  --surface: #131c31;
  --surface-2: #17223b;
  --text: #eaf0f8;
  --muted: #9db0cd;
  --border: #223050;
  --accent: #35a9d6;
  --accent-soft: rgba(53, 169, 214, 0.14);
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
  --radius: 16px;
  --radius-lg: 22px;
  --max-width: 1080px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3f7fc;
    --bg-soft: #eaf1f9;
    --surface: #ffffff;
    --surface-2: #f7fafd;
    --text: #101c33;
    --muted: #55627b;
    --border: #e0e8f3;
    --accent: #0a6f9c;
    --accent-soft: rgba(10, 111, 156, 0.10);
    --shadow: 0 20px 45px -24px rgba(20, 40, 80, 0.35);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; }

.wrap { max-width: var(--max-width); margin: 0 auto; padding-inline: 1.5rem; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* --------------------------------------------------------------------------
   Header
   ------------------------------------------------------------------------ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.site-header::after { content: ""; }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 0.85rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); font-weight: 700; font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 8px; display: block; }
.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a { color: var(--muted); font-weight: 500; font-size: 0.98rem; }
.site-nav a:hover { color: var(--text); text-decoration: none; }
.site-nav .nav-cta {
  color: #fff; background: var(--cyan); padding: 0.45rem 0.95rem;
  border-radius: 999px; font-weight: 600;
}
.site-nav .nav-cta:hover { background: var(--cyan-bright); }
@media (max-width: 560px) { .site-nav .nav-plain { display: none; } }

/* --------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------ */
.hero {
  position: relative; overflow: hidden;
  background: var(--brand-grad);
  color: #fff;
  text-align: center;
  padding: 5.5rem 1.5rem 5rem;
  isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 55% at 78% 18%, rgba(202,228,245,0.28), transparent 60%),
    radial-gradient(50% 50% at 12% 90%, rgba(0,0,0,0.30), transparent 70%);
}
.hero-mark {
  width: 92px; height: 92px; border-radius: 22px; display: block;
  margin: 0 auto 1.6rem;
  box-shadow: 0 18px 40px -12px rgba(0,0,0,0.55);
}
.hero h1 {
  font-size: clamp(2.4rem, 6.2vw, 4rem);
  margin: 0 0 1rem; font-weight: 800;
}
.hero .tagline {
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  color: rgba(255,255,255,0.9);
  max-width: 42ch; margin: 0 auto 2.2rem;
}
.hero .eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--light-blue);
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.22);
  padding: 0.35rem 0.85rem; border-radius: 999px; margin-bottom: 1.5rem;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 0.9rem; justify-content: center; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.6rem; border-radius: 999px;
  font-weight: 650; font-size: 1.02rem; border: 1px solid transparent;
  transition: transform .12s ease, background .2s ease, opacity .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: #fff; color: var(--navy); }
.btn-primary:hover { background: #eef5fb; }
.btn-primary[aria-disabled="true"] { opacity: 0.9; cursor: default; }
.btn-ghost { background: rgba(255,255,255,0.08); color: #fff; border-color: rgba(255,255,255,0.35); }
.btn-ghost:hover { background: rgba(255,255,255,0.16); }
.hero-note { margin-top: 1rem; font-size: 0.9rem; color: rgba(255,255,255,0.75); }

/* platform strip */
.platforms {
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; justify-content: center;
  margin-top: 2.4rem; color: rgba(255,255,255,0.85); font-size: 0.95rem; font-weight: 500;
}
.platforms span { display: inline-flex; align-items: center; gap: 0.4rem; }
.platforms svg { width: 18px; height: 18px; opacity: 0.9; }

/* --------------------------------------------------------------------------
   Section scaffolding
   ------------------------------------------------------------------------ */
section { scroll-margin-top: 80px; }
.section { padding-block: 4.5rem; }
.section-head { text-align: center; max-width: 46ch; margin: 0 auto 2.8rem; }
.section-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); margin: 0 0 0.6rem; }
.section-head p { color: var(--muted); margin: 0; font-size: 1.08rem; }

/* --------------------------------------------------------------------------
   Feature grid
   ------------------------------------------------------------------------ */
.feature-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.1rem;
}
.feature-grid li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.feature-grid li:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: var(--shadow);
}
.feature-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 1rem;
  background: var(--accent-soft); color: var(--accent);
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-grid h3 { margin: 0 0 0.4rem; font-size: 1.15rem; }
.feature-grid p { margin: 0; color: var(--muted); }

/* --------------------------------------------------------------------------
   Privacy band
   ------------------------------------------------------------------------ */
.band {
  background: var(--bg-soft);
  border-block: 1px solid var(--border);
}
.band .wrap { display: grid; grid-template-columns: 1fr; gap: 1.4rem; align-items: center; padding-block: 3.5rem; }
@media (min-width: 760px) { .band .wrap { grid-template-columns: 1.1fr 1fr; gap: 3rem; } }
.band h2 { font-size: clamp(1.6rem, 3.2vw, 2.1rem); margin: 0 0 0.7rem; }
.band p { color: var(--muted); margin: 0 0 1rem; font-size: 1.05rem; }
.band ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.7rem; }
.band ul li { display: flex; gap: 0.6rem; align-items: flex-start; color: var(--text); }
.band ul svg { width: 20px; height: 20px; color: var(--accent); flex: none; margin-top: 3px; }
.band-visual {
  aspect-ratio: 4 / 3; border-radius: var(--radius-lg);
  background: var(--brand-grad); position: relative; overflow: hidden;
  box-shadow: var(--shadow); display: grid; place-items: center;
}
.band-visual svg { width: 40%; height: 40%; color: #fff; opacity: 0.95; }
.band-visual::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 30% 20%, rgba(255,255,255,0.22), transparent 60%);
}

/* --------------------------------------------------------------------------
   FAQ / final CTA
   ------------------------------------------------------------------------ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); padding: 0.4rem 1.2rem; margin-bottom: 0.8rem;
}
.faq summary {
  cursor: pointer; font-weight: 600; padding: 0.9rem 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; color: var(--accent); font-size: 1.4rem; font-weight: 400; line-height: 1;
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 1rem; color: var(--muted); }

.final-cta {
  text-align: center; background: var(--brand-grad); color: #fff;
  border-radius: var(--radius-lg); padding: 3.2rem 1.5rem; box-shadow: var(--shadow);
}
.final-cta h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin: 0 0 0.7rem; }
.final-cta p { color: rgba(255,255,255,0.88); max-width: 44ch; margin: 0 auto 1.8rem; }

/* --------------------------------------------------------------------------
   Content pages (support / privacy)
   ------------------------------------------------------------------------ */
.content { max-width: 760px; margin: 0 auto; padding: 3rem 1.5rem 4rem; }
.content h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin: 0 0 0.5rem; }
.content h2 { margin-top: 2.4rem; font-size: 1.35rem; }
.content h3 { margin-top: 1.6rem; font-size: 1.08rem; }
.content p, .content li { color: var(--text); }
.content .updated { color: var(--muted); font-size: 0.95rem; margin-top: 0; }
.content .lede { font-size: 1.15rem; color: var(--muted); }
.content .callout {
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 12px; padding: 1rem 1.25rem; margin: 1.5rem 0;
}

/* --------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------ */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); }
.site-footer .wrap {
  padding-block: 2.5rem;
  display: flex; flex-wrap: wrap; gap: 1rem 1.5rem;
  align-items: center; justify-content: space-between;
  color: var(--muted); font-size: 0.92rem;
}
.site-footer .brand { font-size: 1.05rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.site-footer nav a { color: var(--muted); }
.site-footer nav a:hover { color: var(--text); }

/* --------------------------------------------------------------------------
   Motion / accessibility
   ------------------------------------------------------------------------ */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }