/* BidRidge — ad-tech corporate site. Self-contained: system fonts, no external assets. */
:root {
  --bg-dark: #0a0f1e;
  --bg-dark-2: #0e1530;
  --bg-light: #f6f8fc;
  --card: #ffffff;
  --ink: #0e1526;
  --ink-soft: #4b5567;
  --ink-faint: #8b94a7;
  --accent: #4f7cff;
  --accent-2: #22d3ee;
  --grad: linear-gradient(92deg, #4f7cff 0%, #22d3ee 100%);
  --good: #16a34a;
  --border: #e4e8f0;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(14, 21, 38, .08);
  --max: 1160px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg-light);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 15, 30, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.head-in { display: flex; align-items: center; gap: 28px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: #fff; letter-spacing: -.02em; }
.logo svg { width: 28px; height: 28px; }
.logo .tld { color: var(--accent-2); }
nav.main-nav { display: flex; gap: 22px; margin-left: 8px; }
nav.main-nav a { color: #c3cade; font-size: 14.5px; font-weight: 500; padding: 6px 2px; transition: color .15s; }
nav.main-nav a:hover, nav.main-nav a.active { color: #fff; }
.head-cta { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.head-cta .login { color: #c3cade; font-size: 14.5px; font-weight: 600; }
.head-cta .login:hover { color: #fff; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-size: 15px; border-radius: 10px; padding: 11px 22px;
  cursor: pointer; border: 0; white-space: nowrap;
  transition: transform .12s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-grad { background: var(--grad); color: #fff; box-shadow: 0 6px 20px rgba(79,124,255,.35); }
.btn-ghost { background: transparent; color: #e6eaf5; border: 1px solid rgba(255,255,255,.25); }
.btn-dark { background: var(--bg-dark); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 13.5px; border-radius: 8px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: .2s; }

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(800px 500px at 10% 110%, rgba(79,124,255,.22), transparent 60%),
    linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%);
  color: #fff; padding: 84px 0 64px; overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent-2); border: 1px solid rgba(34,211,238,.35);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px; background: rgba(34,211,238,.07);
}
.hero h1 { font-size: clamp(34px, 4.6vw, 56px); line-height: 1.08; font-weight: 800; letter-spacing: -.03em; }
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .sub { margin: 20px 0 30px; font-size: 18px; color: #b9c2d8; max-width: 520px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 14px; font-size: 13px; color: #7e89a3; }

.stat-bar {
  margin-top: 48px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  border-top: 1px solid rgba(255,255,255,.09); padding-top: 28px;
}
.stat .num { font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.stat .num.accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { font-size: 12.5px; color: #8b94a7; margin-top: 2px; }

/* exchange mockup */
.mock {
  background: linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.12); border-radius: 18px; padding: 22px;
  box-shadow: 0 30px 60px rgba(0,0,0,.35);
}
.mock-title { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: #8b94a7; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px; }
.mock-title .live { display: inline-flex; align-items: center; gap: 6px; color: #4ade80; font-weight: 700; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }
.mock-row { display: flex; align-items: center; gap: 12px; margin: 10px 0; }
.mock-col { flex: 1; display: flex; flex-direction: column; gap: 10px; }
.mock-hub {
  align-self: center; text-align: center; font-weight: 800; font-size: 13px; letter-spacing: .12em;
  color: #fff; background: var(--grad); border-radius: 12px; padding: 14px 18px; min-width: 120px;
}
.mock-card {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1);
  border-radius: 9px; padding: 9px 12px; font-size: 12.5px; color: #d5dcee;
  display: flex; justify-content: space-between; gap: 10px; white-space: nowrap;
  opacity: 0; transform: translateY(6px); animation: flow 3.6s infinite;
}
.mock-card b { color: #fff; font-weight: 700; }
.mock-card .cpm { color: var(--accent-2); font-weight: 700; }
.mock-card:nth-child(2) { animation-delay: 1.2s; }
.mock-card:nth-child(3) { animation-delay: 2.4s; }
@keyframes flow { 0% { opacity: 0; transform: translateY(6px); } 15%,80% { opacity: 1; transform: none; } 100% { opacity: 0; } }
.mock-foot { margin-top: 16px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.09); font-size: 12.5px; color: #8b94a7; display: flex; justify-content: space-between; }
.mock-foot b { color: #4ade80; }

/* ---------- generic sections ---------- */
section { padding: 84px 0; }
.sec-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.kicker { font-size: 12.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
h2 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; letter-spacing: -.025em; line-height: 1.15; }
.sec-head p { margin-top: 14px; color: var(--ink-soft); font-size: 16.5px; }
.light { background: #fff; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(14,21,38,.12); }
.card h3 { font-size: 17px; font-weight: 800; margin: 14px 0 8px; letter-spacing: -.01em; }
.card p { color: var(--ink-soft); font-size: 14.5px; }
.card .metric { margin-top: 14px; font-size: 13px; font-weight: 800; color: var(--accent); }
.ico {
  width: 44px; height: 44px; border-radius: 11px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(79,124,255,.14), rgba(34,211,238,.14));
}
.ico svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* split feature rows */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split h2 { margin-bottom: 18px; }
.checklist { list-style: none; margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.checklist li { display: flex; gap: 11px; font-size: 15px; color: var(--ink-soft); }
.checklist li b { color: var(--ink); }
.checklist .tick {
  flex: none; width: 20px; height: 20px; border-radius: 6px; margin-top: 1px;
  background: rgba(22,163,74,.12); display: flex; align-items: center; justify-content: center;
}
.checklist .tick svg { width: 11px; height: 11px; stroke: var(--good); stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.big-stat { display: flex; gap: 34px; margin-top: 26px; }
.big-stat .n { font-size: 32px; font-weight: 800; letter-spacing: -.02em; color: var(--ink); }
.big-stat .n span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.big-stat .l { font-size: 13px; color: var(--ink-faint); margin-top: 2px; }

/* proof panel inside split */
.panel {
  background: linear-gradient(160deg, var(--bg-dark), var(--bg-dark-2));
  border-radius: 18px; padding: 28px; color: #fff; box-shadow: 0 24px 50px rgba(10,15,30,.35);
}
.panel .row { display: flex; justify-content: space-between; align-items: center; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 14px; }
.panel .row:last-child { border-bottom: 0; }
.panel .row .k { color: #9aa5bd; }
.panel .row .v { font-weight: 800; }
.panel .row .v.up { color: #4ade80; }
.panel h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .12em; color: #8b94a7; margin-bottom: 8px; }

/* auction timeline */
.timeline { position: relative; margin-top: 56px; }
.tl-track { height: 6px; border-radius: 3px; background: var(--border); position: relative; overflow: hidden; }
.tl-fill { position: absolute; inset: 0; width: 0; background: var(--grad); transition: width 1.2s cubic-bezier(.2,.7,.3,1); }
.tl-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-top: 22px; }
.tl-step { text-align: left; }
.tl-step .ms { font-size: 13px; font-weight: 800; color: var(--accent); }
.tl-step .t { font-size: 14px; font-weight: 700; margin: 4px 0 2px; }
.tl-step .d { font-size: 12.5px; color: var(--ink-faint); }
.tl-step::before { content: ""; display: block; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); margin-bottom: 10px; }
.tl-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 48px; }

/* formats */
.fmt-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.fmt {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
  box-shadow: var(--shadow);
}
.fmt h3 { font-size: 15.5px; font-weight: 800; margin-bottom: 6px; }
.fmt p { font-size: 13px; color: var(--ink-soft); }

/* compliance badges */
.badge-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 36px; }
.badge {
  font-size: 13px; font-weight: 700; color: var(--ink-soft);
  background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 9px 18px;
}

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 18px 22px; font-size: 15.5px; font-weight: 700; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-q .chev { transition: transform .2s; flex: none; }
.faq-item.open .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-a p { padding: 0 22px 20px; color: var(--ink-soft); font-size: 14.5px; }

/* final cta */
.final-cta { background: linear-gradient(160deg, var(--bg-dark), var(--bg-dark-2)); color: #fff; }
.cta-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 48px; }
.cta-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px; padding: 32px; display: flex; flex-direction: column; gap: 12px;
}
.cta-card h3 { font-size: 21px; font-weight: 800; }
.cta-card p { color: #b9c2d8; font-size: 14.5px; flex: 1; }

/* newsletter */
.newsletter { display: flex; gap: 12px; margin-top: 24px; max-width: 460px; }
.newsletter input {
  flex: 1; padding: 12px 16px; border-radius: 10px; border: 1px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.07); color: #fff; font-size: 14px; outline: none;
}
.newsletter input::placeholder { color: #7e89a3; }
.news-note { font-size: 12.5px; color: #7e89a3; margin-top: 10px; }

/* ---------- footer ---------- */
.site-foot { background: var(--bg-dark); color: #9aa5bd; padding: 64px 0 32px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 36px; }
.foot-grid h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px; }
.foot-grid ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.foot-grid a:hover { color: #fff; }
.foot-brand p { margin-top: 14px; font-size: 13.5px; max-width: 260px; }
.status { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; font-size: 12.5px; color: #4ade80; font-weight: 600; }
.foot-bottom {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.08);
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap; font-size: 13px;
}
.compliance-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-size: 11px; font-weight: 800; letter-spacing: .06em; color: #c3cade;
  border: 1px solid rgba(255,255,255,.18); border-radius: 6px; padding: 5px 10px;
}

/* cookie banner */
.cookie {
  position: fixed; bottom: 18px; left: 18px; right: 18px; max-width: 560px; z-index: 90;
  background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px;
  box-shadow: 0 20px 50px rgba(14,21,38,.25); display: none;
}
.cookie.show { display: block; }
.cookie p { font-size: 13.5px; color: var(--ink-soft); }
.cookie .row { display: flex; gap: 10px; margin-top: 12px; }

/* contact / generic page hero */
.page-hero { background: linear-gradient(160deg, var(--bg-dark), var(--bg-dark-2)); color: #fff; padding: 72px 0 56px; }
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -.03em; }
.page-hero p { margin-top: 14px; color: #b9c2d8; max-width: 640px; font-size: 17px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.form label { display: block; font-size: 13px; font-weight: 700; margin: 16px 0 6px; }
.form input, .form select, .form textarea {
  width: 100%; padding: 11px 14px; border-radius: 9px; border: 1px solid var(--border);
  font-size: 14px; font-family: inherit; background: #fff; color: var(--ink); outline: none;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--accent); }
.form-note { font-size: 12.5px; color: var(--ink-faint); margin-top: 10px; }
.legal { max-width: 780px; margin: 0 auto; }
.legal h2 { font-size: 22px; margin: 36px 0 12px; }
.legal p, .legal li { color: var(--ink-soft); font-size: 15px; margin-bottom: 10px; }
.legal ul { padding-left: 22px; }
.legal .updated { color: var(--ink-faint); font-size: 13.5px; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .split, .contact-grid, .cta-cards { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4, .fmt-grid, .tl-stats { grid-template-columns: repeat(2, 1fr); }
  .tl-steps { grid-template-columns: repeat(2, 1fr); }
  .stat-bar { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: repeat(2, 1fr); }
  nav.main-nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-dark); flex-direction: column; gap: 0; padding: 12px 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { padding: 12px 0; font-size: 16px; }
  .nav-toggle { display: block; margin-left: auto; }
  .head-cta .login { display: none; }
  .head-cta { margin-left: 0; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .fmt-grid, .tl-stats { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
  .big-stat { flex-wrap: wrap; gap: 20px; }
  .stat .num { font-size: 22px; }
  .mock-col { min-width: 0; }
  .mock-row { flex-direction: column; gap: 10px; }
  .mock-col { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 8px; }
  .mock-card { white-space: normal; font-size: 11.5px; padding: 8px 9px; }
  .mock-hub { min-width: 0; padding: 12px; font-size: 11px; }
  .head-cta .btn { padding: 8px 12px; font-size: 13px; }
  .hero-ctas .btn { width: 100%; }
}