/* ==========================================================================
   Velox World — home page
   ========================================================================== */

/* ---------- hero ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: max(760px, 100svh);
  display: flex; align-items: flex-end;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 520px at 78% 24%, rgba(82, 224, 255, 0.12), transparent 62%),
    radial-gradient(760px 480px at 6% 72%, rgba(140, 123, 255, 0.15), transparent 62%),
    linear-gradient(90deg, rgba(4, 6, 11, 0.9) 0%, rgba(4, 6, 11, 0.62) 38%, rgba(4, 6, 11, 0) 72%),
    linear-gradient(to bottom, rgba(4, 6, 11, 0.55) 0%, rgba(4, 6, 11, 0) 28%, rgba(4, 6, 11, 0) 62%, rgba(4, 6, 11, 0.92) 100%);
}
.hero-inner { width: 100%; padding-top: calc(var(--nav-h) + 80px); padding-bottom: 140px; }
.hero h1 {
  margin-top: 26px;
  font-size: clamp(44px, 7.6vw, 112px);
  font-weight: 600; letter-spacing: -0.032em; line-height: 1.0;
  text-wrap: balance;
}
.hero h1 span { display: block; }
.hero h1 .grad { padding-bottom: 0.06em; }
.hero .lead { margin-top: 30px; max-width: 37em; font-size: clamp(17px, 1.6vw, 20px); line-height: 1.6; color: #c3cbdb; text-shadow: 0 1px 14px rgba(4, 6, 11, 0.95), 0 0 2px rgba(4, 6, 11, 0.6); }
.hero-cta { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }

/* cycling application domains */
.domains { margin-top: 30px; display: flex; align-items: center; gap: 14px; font: 500 12px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
.domains .cycle { position: relative; display: inline-block; height: 1.4em; min-width: 22ch; }
.domains .cycle span { position: absolute; left: 0; top: 0; white-space: nowrap; color: var(--accent); opacity: 0; animation: cyc 12s var(--ease) infinite; animation-delay: calc(var(--i) * 3s); }
@keyframes cyc {
  0% { opacity: 0; transform: translateY(10px); filter: blur(4px); }
  4%, 21% { opacity: 1; transform: none; filter: none; }
  25%, 100% { opacity: 0; transform: translateY(-10px); filter: blur(4px); }
}

.hud {
  position: absolute; left: 0; right: 0; bottom: 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(to top, rgba(4, 6, 11, 0.82), rgba(4, 6, 11, 0.2));
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.hud-in { display: flex; align-items: center; gap: 28px; height: 54px; font: 500 11.5px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); white-space: nowrap; overflow: hidden; }
.hud b { color: var(--text-2); font-weight: 500; }
.hud .grow { flex: 1; }
.hud .noise-bar { display: inline-flex; align-items: center; gap: 12px; }
.hud .noise-bar i {
  display: block; width: 120px; height: 5px; border-radius: 3px;
  background: linear-gradient(90deg, #4a5268 0%, #6c7bd0 40%, var(--cyan) 100%);
  -webkit-mask-image: repeating-linear-gradient(90deg, #000 0 3px, transparent 3px 5px);
  mask-image: repeating-linear-gradient(90deg, #000 0 3px, transparent 3px 5px);
}
.hud .ok { color: var(--green); }
.hud .plan { color: var(--cyan); }

/* ---------- generated-worlds wall ---------- */
.wall { position: relative; padding: 34px 0 40px; border-bottom: 1px solid var(--line); background: linear-gradient(to bottom, rgba(4, 6, 11, 0), var(--bg-1) 60%); overflow: hidden; }
.wall-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-bottom: 18px; font: 500 11.5px/1.3 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.wall-head b { color: var(--text-2); font-weight: 500; }
.wall-view { position: relative; -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 9%, #000 91%, transparent 100%); mask-image: linear-gradient(90deg, transparent 0, #000 9%, #000 91%, transparent 100%); }
.wall-track { display: flex; gap: 14px; width: max-content; will-change: transform; }
.js .wall-track { animation: marquee 90s linear infinite; }
.js .wall-view:hover .wall-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(calc(-50% - 7px)); } }
.tile { position: relative; flex: none; width: clamp(220px, 24vw, 340px); aspect-ratio: 16 / 9; border-radius: 14px; overflow: hidden; border: 1px solid var(--line-2); background: #05070d; box-shadow: 0 24px 60px -34px rgba(0, 0, 0, 0.9); }
.tile video, .tile img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.tile::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(4, 6, 11, 0.5), transparent 45%); pointer-events: none; }
.tile i { position: absolute; left: 10px; bottom: 9px; z-index: 1; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

/* ---------- vision ---------- */
.vision-grid { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.reqs { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.req { position: relative; display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 4px 18px; align-items: start; padding: 28px 0 30px; border-bottom: 1px solid var(--line); }
.req::before { content: ""; position: absolute; left: 0; top: -1px; height: 1px; width: 0; background: linear-gradient(90deg, var(--accent), transparent); transition: width 0.8s var(--ease); }
.req:hover::before { width: 100%; }
.req .idx { font: 500 12.5px/1.6 var(--mono); letter-spacing: 0.14em; color: var(--text-3); }
.req h3 { font-size: clamp(24px, 2.4vw, 32px); letter-spacing: -0.022em; }
.req p { margin-top: 10px; color: var(--text-2); font-size: 16px; line-height: 1.6; max-width: 36em; }
.req .by { grid-column: 2; justify-self: start; margin-top: 14px; font: 500 11.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); white-space: nowrap; padding: 7px 10px; border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); border-radius: 999px; transition: background 0.2s; }
.req a.by:hover { background: color-mix(in srgb, var(--accent) 14%, transparent); }
.req .by.rpo { --accent: var(--amber); }
.req .by.both { color: var(--text-2); border-color: var(--line-2); }

.imagine { position: relative; border-radius: var(--r-lg); border: 1px solid var(--line-2); background: radial-gradient(520px 300px at 70% 20%, rgba(82, 224, 255, 0.09), transparent 70%), var(--bg-1); overflow: hidden; }
.imagine svg { display: block; width: 100%; height: auto; }
.imagine figcaption { padding: 14px 18px 16px; border-top: 1px solid var(--line); font: 500 11.5px/1.5 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); display: flex; flex-wrap: wrap; gap: 6px 22px; }
.imagine figcaption b { color: var(--text-2); font-weight: 500; }
.imagine .flow { stroke-dasharray: 5 9; animation: flow 1.8s linear infinite; }
.imagine .flow.pick { stroke-dasharray: 8 7; animation-duration: 1.1s; }
@keyframes flow { to { stroke-dashoffset: -28; } }
.imagine .pulse { transform-box: fill-box; transform-origin: center; animation: ping 2.6s ease-out infinite; }
@keyframes ping { 0% { transform: scale(0.6); opacity: 0.9; } 100% { transform: scale(2.4); opacity: 0; } }
.imagine .pick-frame { animation: glow 3.2s ease-in-out infinite; }
@keyframes glow { 50% { opacity: 0.55; } }

/* ---------- research cards ---------- */
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.proj-card { display: flex; flex-direction: column; color: inherit; }
.proj-card:hover { transform: translateY(-4px); box-shadow: 0 30px 80px -30px color-mix(in srgb, var(--accent) 45%, transparent); }
.proj-card .vis { position: relative; aspect-ratio: 16 / 9; border-bottom: 1px solid var(--line); background: #05070d; overflow: hidden; }
.proj-card .vis canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.proj-card .vis video { position: absolute; width: 2px; height: 2px; opacity: 0; pointer-events: none; }
.proj-card .vis .rule { position: absolute; top: 0; bottom: 0; left: var(--x, 50%); width: 2px; margin-left: -1px; background: #fff; box-shadow: 0 0 18px rgba(255, 255, 255, 0.6); z-index: 2; }
.proj-card .vis::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11, 15, 25, 0.78), transparent 48%); pointer-events: none; }
.proj-card .tags { position: absolute; inset: auto 16px 14px 16px; z-index: 3; display: flex; justify-content: space-between; gap: 8px; }
.proj-card .body { padding: 28px 28px 30px; display: flex; flex-direction: column; gap: 16px; flex: 1; }
.proj-card .kicker { font: 500 11.5px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.proj-card h3 { font-size: clamp(24px, 2.3vw, 31px); letter-spacing: -0.022em; line-height: 1.14; text-wrap: balance; }
.proj-card p { color: var(--text-2); }
.proj-card .facts { margin-top: auto; padding-top: 20px; display: grid; grid-template-columns: repeat(3, auto); gap: 8px 28px; justify-content: start; border-top: 1px solid var(--line); }
.proj-card .go { margin-top: 6px; display: inline-flex; align-items: center; gap: 10px; font-weight: 600; color: var(--accent); }
.proj-card .go .arr { transition: transform 0.3s var(--ease); }
.proj-card:hover .go .arr { transform: translateX(5px); }
.fact b { display: block; font-size: 24px; letter-spacing: -0.02em; font-weight: 650; font-variant-numeric: tabular-nums; }
.fact small { display: block; margin-top: 4px; font: 500 11px/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); }

/* ---------- direction ---------- */
.direction { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: var(--bg-1); }
.dir { padding: 34px 30px 36px; border-right: 1px solid var(--line); position: relative; }
.dir:last-child { border-right: 0; }
.dir .step { font: 500 11.5px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.dir h3 { margin-top: 28px; font-size: 24px; letter-spacing: -0.018em; }
.dir p { margin-top: 12px; color: var(--text-2); font-size: 15px; }
.dir .by { margin-top: 22px; display: inline-flex; align-items: center; gap: 8px; font: 500 12px/1 var(--mono); letter-spacing: 0.06em; color: var(--accent); }
.dir.next { background: repeating-linear-gradient(135deg, transparent 0 14px, rgba(148, 170, 215, 0.035) 14px 15px); }
.dir.next .by { color: var(--text-3); }

/* ---------- closing ---------- */
.closing { text-align: center; padding: clamp(90px, 12vw, 170px) 0; position: relative; overflow: hidden; isolation: isolate; }
.closing::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(640px 320px at 50% 100%, rgba(82, 224, 255, 0.16), transparent 70%), radial-gradient(520px 280px at 50% 100%, rgba(140, 123, 255, 0.14), transparent 70%);
}
.closing h2 { font-size: clamp(34px, 5.2vw, 68px); letter-spacing: -0.028em; line-height: 1.06; text-wrap: balance; max-width: 14em; margin: 0 auto; }
.closing .lead { margin: 26px auto 0; }
.closing .hero-cta { justify-content: center; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .vision-grid { grid-template-columns: minmax(0, 1fr); }
  .research-grid { grid-template-columns: minmax(0, 1fr); }
  .direction { grid-template-columns: minmax(0, 1fr); }
  .dir { border-right: 0; border-bottom: 1px solid var(--line); }
  .dir:last-child { border-bottom: 0; }
}
@media (max-width: 720px) {
  .hud .hide-s { display: none; }
  .hero-inner { padding-top: calc(var(--nav-h) + 52px); padding-bottom: 112px; }
  .domains .cycle { min-width: 20ch; }
  .req { grid-template-columns: 1fr; gap: 6px; }
  .req .by { grid-column: 1; }
  .tile { width: 62vw; }
}
@media (prefers-reduced-motion: reduce) {
  .js .wall-track { animation: none; }
  .domains .cycle span { animation: none; opacity: 0; }
  .domains .cycle span:first-child { opacity: 1; }
}