/* Hellobru — dark futuristic AI */
:root {
  --bg: #05070f;
  --bg2: #0a0f1c;
  --ink: #e8eefc;
  --muted: #8b97b3;
  --line: rgba(120, 160, 255, 0.18);
  --glow: #5b8cff;
  --glow2: #7c5cff;
  --cyan: #3de0ff;
  --max: 36rem;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.theme-ai {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: radial-gradient(1200px 600px at 20% -10%, #121a33 0%, transparent 55%),
              radial-gradient(900px 500px at 90% 10%, #1a1030 0%, transparent 50%),
              var(--bg);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

a { color: var(--cyan); text-underline-offset: 0.18em; }
a:hover { color: #fff; }

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}
.bg-orb-a {
  width: 420px; height: 420px;
  top: -80px; left: -100px;
  background: var(--glow);
}
.bg-orb-b {
  width: 360px; height: 360px;
  bottom: 10%; right: -80px;
  background: var(--glow2);
}

.grid-fade {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(120,160,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,160,255,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  opacity: 0.5;
}

.site-header, main, .site-footer { position: relative; z-index: 1; }

.shell, .site-header .inner, .site-footer .inner, .policy {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.site-header { padding: 1.5rem 0 0; }
.site-header .inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 650;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  transition: text-shadow 0.25s ease, color 0.25s ease, transform 0.2s ease;
}
.logo:hover {
  color: #fff;
  text-shadow: 0 0 18px rgba(91,140,255,0.7);
  transform: scale(1.03);
}

.nav { display: flex; gap: 1.25rem; font-size: 0.88rem; }
.nav-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease, text-shadow 0.25s ease, transform 0.2s ease;
}
.nav-link:hover {
  color: #fff;
  text-shadow: 0 0 12px rgba(61,224,255,0.55);
  transform: translateY(-1px);
}

main { flex: 1; }

.hero { padding: 5rem 0 4rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 1.1rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(61,224,255,0.35);
  border-radius: 999px;
  background: rgba(61,224,255,0.06);
  box-shadow: 0 0 24px rgba(61,224,255,0.12);
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 2.75rem);
  font-weight: 650;
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin: 0 0 0.85rem;
  background: linear-gradient(120deg, #fff 10%, #9ec1ff 55%, #c4b5ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 22rem;
}

.hero-stats {
  display: flex;
  gap: 1.5rem;
  margin: 0 0 2rem;
}

.stat {
  min-width: 5.5rem;
  padding: 0.85rem 1rem;
  border-radius: 0.85rem;
  border: 1px solid var(--line);
  background: rgba(10, 16, 32, 0.65);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 30px rgba(91,140,255,0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.stat:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: rgba(91,140,255,0.45);
  box-shadow: 0 0 36px rgba(91,140,255,0.22);
}

.stat-num {
  display: block;
  font-size: 1.55rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: #fff;
  text-shadow: 0 0 20px rgba(91,140,255,0.45);
}
.stat-label {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(91,140,255,0.45);
  background: linear-gradient(135deg, rgba(91,140,255,0.25), rgba(124,92,255,0.2));
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease;
  box-shadow: 0 0 28px rgba(91,140,255,0.25);
  margin-bottom: 3rem;
}
.btn:hover {
  transform: scale(1.04);
  border-color: rgba(61,224,255,0.7);
  box-shadow: 0 0 40px rgba(61,224,255,0.35);
  color: #fff;
}
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 0.55s ease-out;
  background: rgba(255,255,255,0.35);
  pointer-events: none;
}
@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

.contact {
  border-top: 1px solid var(--line);
  padding-top: 1.75rem;
}
.contact h2 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.9rem;
}
.contact dl { margin: 0; display: grid; gap: 0.75rem; }
.contact dt { font-size: 0.7rem; color: var(--muted); margin: 0; }
.contact dd { margin: 0.1rem 0 0; font-size: 0.92rem; color: var(--ink); opacity: 0.9; }
.contact a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s ease, text-shadow 0.25s ease;
}
.contact a:hover {
  color: var(--cyan);
  text-shadow: 0 0 14px rgba(61,224,255,0.4);
}

.site-footer { padding: 1.5rem 0 2.25rem; font-size: 0.82rem; color: var(--muted); }
.site-footer .inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.reveal[data-reveal]:nth-of-type(2) { transition-delay: 0.06s; }
.reveal[data-reveal]:nth-of-type(3) { transition-delay: 0.12s; }
.reveal[data-reveal]:nth-of-type(4) { transition-delay: 0.18s; }
.reveal[data-reveal]:nth-of-type(5) { transition-delay: 0.24s; }

/* Privacy */
.policy { padding: 2.25rem 0 3.5rem; }
.policy .back { margin: 0 0 1.5rem; font-size: 0.88rem; }
.policy h1 {
  font-size: clamp(1.55rem, 4vw, 1.9rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
  background: linear-gradient(120deg, #fff, #9ec1ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.policy-meta { color: var(--muted); font-size: 0.88rem; margin: 0 0 1.75rem; }
.policy h2 {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 2rem 0 0.55rem;
  color: #d7e2ff;
}
.policy p { margin: 0 0 0.85rem; color: #c5cee3; }
.policy .bullets { margin: 0.4rem 0 0.9rem; padding-left: 1.1rem; color: #c5cee3; }
.policy .bullets li { margin-bottom: 0.35rem; }
.policy ol.steps { margin: 0.55rem 0 0.9rem; padding-left: 1.1rem; color: #c5cee3; }
.policy ol.steps li { margin-bottom: 0.75rem; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn .ripple { display: none; }
}