/* Violet Bridge Security LLC — Site Styles
   GitHub Pages-ready. Minimal, fast, responsive, and accessible.
*/

/* ---------- CSS Reset (trimmed) ----------- */
*,
*::before,
*::after { box-sizing: border-box; }
html:focus-within { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul[role='list'], ol[role='list'] { list-style: none; }
img, picture { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; }
:root { color-scheme: light dark; }

/* ---------- Theme ---------- */
:root {
  --bg: #0f0f14;
  --surface: #16161d;
  --surface-2: #1c1c26;
  --text: #e9e9ef;
  --text-dim: #b9b9c8;
  --primary: #6f3bd6;
  --primary-2: #5b2dbd;
  --accent: #a78bfa;
  --ok: #21c07a;
  --danger: #ef4444;
  --ring: 0 0 0 3px rgba(111, 59, 214, .35);
  --shadow: 0 10px 25px rgba(0,0,0,.25);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f9f9fb;
    --surface: #ffffff;
    --surface-2: #f1f1f7;
    --text: #171717;
    --text-dim: #58596a;
    --primary: #5b2dbd;
    --primary-2: #4a22a4;
    --accent: #6f3bd6;
    --ring: 0 0 0 3px rgba(91, 45, 189, .25);
    --shadow: 0 6px 20px rgba(0,0,0,.08);
  }
}

/* ---------- Base ---------- */
html, body {
  height: 100%;
}
body {
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}

.section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.section.alt {
  background: var(--surface-2);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  left: 16px; top: 16px; width: auto; height: auto;
  background: var(--primary); color: #fff; padding: 10px 14px; border-radius: 10px;
  outline: none; box-shadow: var(--ring);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--bg), transparent 15%);
  border-bottom: 1px solid color-mix(in oklab, var(--text-dim), transparent 85%);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: inline-flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: .2px;
}
.brand-text { font-size: 1.05rem; }
.brand-primary { color: var(--primary); }
.brand-secondary { opacity: .95; }
.brand-llc { font-weight: 600; opacity: .8; }

.brand-mark { display: inline-block; }
.brand-mark rect { fill: var(--primary-2); }
.brand-mark .bridge {
  stroke: #fff; stroke-width: 4; fill: none; stroke-linecap: round;
}
.brand-mark .node { fill: #fff; }

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 80%);
  border-radius: 12px; padding: 8px 12px; line-height: 1;
  cursor: pointer;
}
.site-nav ul { display: flex; gap: 20px; align-items: center; }
.site-nav a { padding: 8px 10px; border-radius: 10px; }
.site-nav a:hover { background: color-mix(in oklab, var(--text), transparent 90%); text-decoration: none; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px;
  background: var(--primary);
  border: none; color: #fff; padding: 12px 18px; border-radius: 14px;
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .2s ease, background .2s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn:active { transform: translateY(0); }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 1px solid currentColor; box-shadow: none;
}
.btn-small { padding: 8px 12px; border-radius: 12px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(80% 60% at 50% -10%, color-mix(in oklab, var(--primary), transparent 75%), transparent 60%),
    linear-gradient(180deg, color-mix(in oklab, var(--surface), transparent 0%), transparent 70%);
}
.hero-inner {
  padding: clamp(48px, 6vw, 72px) 0;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: .2px;
}
.hero .accent { color: var(--accent); }
.lead {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: clamp(16px, 2.4vw, 18px);
  max-width: 70ch;
}
.hero-ctas { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }

.trust-badges {
  margin-top: 20px; display: flex; flex-wrap: wrap; gap: 10px; padding-left: 0;
}
.trust-badges li {
  list-style: none;
  padding: 8px 12px; border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 80%);
  font-size: 14px;
}

/* ---------- Cards / Grid ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 85%);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  min-height: 110px;
}
.card h3 { margin-bottom: 6px; font-size: 1.05rem; }
.card p { color: var(--text-dim); }

/* ---------- Steps ---------- */
.steps {
  display: grid; gap: 16px;
  grid-template-columns: repeat(3, minmax(0,1fr));
}
.step {
  background: var(--surface);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 85%);
  padding: 16px; border-radius: 16px;
  box-shadow: var(--shadow);
}
.step h3 { margin-bottom: 6px; }

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  background: var(--surface-2);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 82%);
  padding: 8px 12px; border-radius: 999px; font-size: 14px;
}

/* ---------- About ---------- */
.about { display: grid; gap: 24px; grid-template-columns: 1fr; }
.about-text p { color: var(--text-dim); max-width: 70ch; }

/* ---------- Contact ---------- */
.contact .contact-form {
  display: grid; gap: 12px;
  background: var(--surface);
  padding: 18px; border-radius: 18px;
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 85%);
  box-shadow: var(--shadow);
}
.contact-form label {
  display: grid; gap: 8px; font-weight: 600; font-size: 0.95rem;
}
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  background: var(--surface-2);
  border: 1px solid color-mix(in oklab, var(--text-dim), transparent 75%);
  color: var(--text);
  padding: 12px 12px; border-radius: 12px;
}
.contact-form input:focus,
.contact-form textarea:focus { outline: none; box-shadow: var(--ring); }
.contact-form button { margin-top: 6px; }

/* ---------- Footer ---------- */
.site-footer {
  padding: 20px 0; background: var(--surface-2);
  border-top: 1px solid color-mix(in oklab, var(--text-dim), transparent 85%);
}
.footer-inner { display: flex; align-items: center; justify-content: center; }
.footer-inner p { color: var(--text-dim); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; right: 16px; bottom: 16px; z-index: 60;
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--primary);
  color: #fff; border: none; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:focus-visible { outline: none; box-shadow: var(--ring); }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0; transform: translateY(8px); transition: opacity .4s ease, transform .4s ease;
}
.reveal.in {
  opacity: 1; transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .brand-text { display: none; }
}

@media (max-width: 700px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .site-nav { position: absolute; inset: 60px 0 auto 0; }
  .site-nav ul {
    position: absolute; right: 4%; left: 4%;
    display: grid; gap: 10px; padding: 14px;
    border-radius: 14px; background: var(--surface);
    border: 1px solid color-mix(in oklab, var(--text-dim), transparent 80%);
    box-shadow: var(--shadow);
    opacity: 0; transform: translateY(-10px); pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .site-nav.open ul { opacity: 1; transform: translateY(0); pointer-events: auto; }
}