/* CASPROD landing — dark, cinematic, purple. Hand-written, no framework. */

:root {
  --bg: #0f0c17;
  --bg-2: #15111d;
  --bg-3: #1c1629;
  --line: rgba(255, 255, 255, 0.08);
  --fg: #f5f0fc;
  --muted: #a89fc2;
  --accent: #854cdb;
  --accent-2: #b18cf0;
  --accent-deep: #5d2bb0;
  --glow: rgba(133, 76, 219, 0.55);
  --ok: #3ddc97;
  --radius: 20px;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 var(--font-body); -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
p { margin: 0; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 24px;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); background: color-mix(in srgb, var(--bg) 80%, transparent); }
.nav__brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--font-display); font-weight: 700; letter-spacing: .06em; }
.nav__links { display: flex; gap: 26px; font-size: 14px; color: var(--muted); }
.nav__links a { text-decoration: none; transition: color .2s; }
.nav__links a:hover { color: var(--fg); }
@media (max-width: 760px) { .nav__links { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px; text-decoration: none; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; transition: transform .25s var(--ease), box-shadow .25s, background .25s, border-color .25s;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: linear-gradient(135deg, var(--accent-2), var(--accent) 45%, var(--accent-deep)); color: #fff; box-shadow: 0 10px 30px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,.25); }
.btn--primary:hover { box-shadow: 0 16px 40px -10px var(--glow), inset 0 1px 0 rgba(255,255,255,.3); }
.btn--ghost { background: rgba(255,255,255,.04); border-color: var(--line); color: var(--fg); }
.btn--ghost:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18); }
.btn--sm { padding: 9px 16px; font-size: 14px; }

/* ---------- hero ---------- */
.hero { position: relative; height: 200vh; }
.hero__stage { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; }
#scene { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero__fallback {
  position: absolute; inset: 0; opacity: 0; transition: opacity .6s;
  background:
    radial-gradient(60% 50% at 70% 45%, rgba(133,76,219,.35), transparent 70%),
    radial-gradient(40% 40% at 25% 80%, rgba(93,43,176,.25), transparent 70%),
    linear-gradient(transparent 0, transparent 100%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.04) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 1px, transparent 1px 48px);
}
.hero.no-webgl .hero__fallback { opacity: 1; }
.hero__vignette {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--bg) 92%, transparent) 0%, color-mix(in srgb, var(--bg) 55%, transparent) 42%, transparent 62%),
    linear-gradient(0deg, var(--bg) 0%, transparent 22%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 70%, transparent) 0%, transparent 25%);
}
@media (max-width: 900px) {
  .hero__vignette { background: linear-gradient(180deg, color-mix(in srgb, var(--bg) 75%, transparent) 0%, color-mix(in srgb, var(--bg) 88%, transparent) 55%, var(--bg) 100%); }
}
.hero__content {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center;
  max-width: 1140px; margin: 0 auto; padding: 96px 24px 80px; width: 100%;
}
.hero__title { font-size: clamp(38px, 6.2vw, 78px); line-height: 1.02; max-width: 12ch; margin: 18px 0 22px; }
.hero__title em { font-style: normal; background: linear-gradient(90deg, var(--accent-2), #e6d6ff 60%, var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__lead { max-width: 52ch; color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero__facts { list-style: none; padding: 0; margin: 40px 0 0; display: flex; flex-wrap: wrap; gap: 8px 28px; color: var(--muted); font-size: 14px; }
.hero__facts strong { color: var(--fg); font-family: var(--font-display); font-size: 18px; margin-right: 6px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 0 rgba(61,220,151,.6); animation: pulse 2.2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(61,220,151,0); } 100% { box-shadow: 0 0 0 0 rgba(61,220,151,0); } }

/* Floating HUD labels that track the 3D building (positions set from JS). */
.hero__hud { position: absolute; inset: 0; pointer-events: none; }
.hud {
  position: absolute; transform: translate(-50%, -50%);
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 14px; border-radius: 12px;
  background: color-mix(in srgb, var(--bg-2) 70%, transparent); border: 1px solid var(--line);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  opacity: 0; transition: opacity .5s var(--ease);
  font-size: 12px; white-space: nowrap;
}
.hud.is-on { opacity: 1; }
.hud__k { color: var(--muted); letter-spacing: .08em; text-transform: uppercase; font-size: 10px; }
.hud__v { font-weight: 600; }
.hud::before { content: ""; position: absolute; left: -22px; top: 50%; width: 22px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-2)); }
@media (max-width: 900px) { .hero__hud { display: none; } }

.hero__scroll { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); color: var(--muted); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 10px; opacity: .8; }
.hero__scroll span { width: 1px; height: 36px; background: linear-gradient(180deg, var(--accent-2), transparent); animation: drip 1.8s var(--ease) infinite; }
@keyframes drip { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }
.hero.is-built .hero__scroll { opacity: 0; transition: opacity .4s; }

/* ---------- marquee ---------- */
.marquee { overflow: hidden; border-block: 1px solid var(--line); background: var(--bg-2); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee__track { display: flex; gap: 14px; width: max-content; padding: 14px 0; animation: marquee 38s linear infinite; }
.marquee__track span { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.03); font-size: 14px; color: var(--muted); white-space: nowrap; font-family: var(--font-display); }
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; } }

/* ---------- sections ---------- */
.section { padding: clamp(80px, 12vw, 140px) 0; position: relative; }
.section--alt { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 20%, var(--bg-2) 80%, var(--bg) 100%); }
.h2 { font-size: clamp(30px, 4.4vw, 52px); line-height: 1.06; margin: 14px 0 20px; max-width: 22ch; }
.lead { color: var(--muted); font-size: clamp(16px, 1.5vw, 19px); max-width: 62ch; }
.link { color: var(--accent-2); text-decoration: none; font-weight: 600; }
.link:hover { text-decoration: underline; }

/* steps with drawn line */
.steps { list-style: none; padding: 0; margin: 48px 0 0; position: relative; display: grid; gap: 40px; max-width: 760px; }
.steps__line { position: absolute; left: 27px; top: 28px; bottom: 28px; width: 2px; height: calc(100% - 56px); overflow: visible; }
.steps__line path { stroke: var(--accent); stroke-width: 2; fill: none; stroke-dasharray: 100; stroke-dashoffset: 100; vector-effect: non-scaling-stroke; }
@supports (animation-timeline: view()) {
  .steps__line path { animation: draw linear both; animation-timeline: view(); animation-range: entry 20% cover 70%; }
}
.steps.is-drawn .steps__line path { stroke-dashoffset: 0; transition: stroke-dashoffset 1.6s var(--ease); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.step { display: grid; grid-template-columns: 56px 1fr; gap: 22px; align-items: start; }
.step__n { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; background: var(--bg); border: 2px solid var(--accent); color: var(--accent-2); box-shadow: 0 0 0 6px var(--bg), 0 0 30px -6px var(--glow); position: relative; z-index: 1; }
.step h3 { font-size: 22px; margin: 12px 0 6px; }
.step p { color: var(--muted); }

/* trust tiles */
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 44px 0 28px; }
.tile { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01)); transition: transform .35s var(--ease), border-color .3s, background .3s; }
.tile:hover { transform: translateY(-4px); border-color: rgba(177,140,240,.4); background: linear-gradient(180deg, rgba(133,76,219,.14), rgba(255,255,255,.02)); }
.tile__icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(133,76,219,.16); border: 1px solid rgba(133,76,219,.3); font-size: 20px; }
.tile h3 { font-size: 18px; margin: 16px 0 8px; }
.tile p { color: var(--muted); font-size: 14.5px; }

/* cta */
.cta { padding: clamp(80px, 12vw, 140px) 0; position: relative; overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: -40% -20%; background: radial-gradient(40% 50% at 50% 50%, rgba(133,76,219,.35), transparent 60%); filter: blur(30px); pointer-events: none; }
.cta__inner { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.cta__inner .h2 { margin-top: 20px; }
.cta__inner .lead { margin: 0 auto 10px; }
.cta__inner .hero__cta { justify-content: center; }
.cta__logo { filter: drop-shadow(0 12px 30px var(--glow)); }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
.footer__inner { display: flex; flex-wrap: wrap; gap: 18px 32px; align-items: center; justify-content: space-between; }
.footer__brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; letter-spacing: .06em; color: var(--fg); }
.footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.footer nav a { text-decoration: none; }
.footer nav a:hover { color: var(--fg); }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@supports (animation-timeline: view()) {
  .reveal { opacity: 1; transform: none; transition: none; animation: rise linear both; animation-timeline: view(); animation-range: entry 0% entry 40%; }
  @keyframes rise { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; animation: none; transition: none; }
  .btn, .tile { transition: none; }
  .eyebrow .dot, .hero__scroll span { animation: none; }
}