/* gpuvera.com — GPUHUB PTE. LTD. */
/* Design DNA: BRIGHT INDUSTRIAL product photography. Big-media driven, honest-spec, consumer-warm. */
/* Deliberately DISTINCT from inra.dev (near-black terminal) — 两站不同质 veto gate. */
/* Hard gate: NO purple-black glow, NO render-only vision hero outrunning specs, NO Humane hype. */
/* Reference tone: Framework / DJI / Insta360 — neutral metal + one industrial accent. */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Bright industrial palette — warm off-white surfaces, graphite ink, aluminium greys */
  --bg:        #F5F3EF;   /* warm off-white base (paper / studio sweep) */
  --bg-alt:    #EDEAE3;   /* alt section band */
  --bg-card:   #FFFFFF;   /* raised card */
  --bg-ink:    #16181C;   /* dark band for contrast breaks */
  --border:    #DED9D0;
  --border-hi: #C9C3B8;
  --ink:       #16181C;   /* near-black graphite text */
  --ink-dim:   #4A4E56;
  --ink-mute:  #8A8578;
  --ink-on-dark: #F3F1EC;
  /* single industrial accent — safety orange, machined, not neon */
  --accent:    #E8562A;   /* industrial safety orange */
  --accent-hi: #FF6A3C;
  --accent-dim: rgba(232, 86, 42, 0.10);
  /* aluminium / metal cue */
  --metal:     #B7BAC0;
  --metal-hi:  #D6D8DC;
  --ok:        #2F8F5B;
  --shadow-sm: 0 1px 3px rgba(22,24,28,0.06), 0 1px 2px rgba(22,24,28,0.04);
  --shadow-md: 0 8px 24px rgba(22,24,28,0.10);
  --shadow-lg: 0 20px 60px rgba(22,24,28,0.14);
  --radius:    14px;
  --radius-sm: 10px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code, pre, .mono {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wide { max-width: 1280px; }

/* ---------- Nav ---------- */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(245, 243, 239, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-weight: 700; font-size: 20px; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 2px;
}
.logo .dot { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--ink-dim); font-size: 15px; font-weight: 500; transition: color .15s; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--accent); color: #fff !important; font-weight: 600; font-size: 14px;
  padding: 9px 18px; border-radius: 999px; transition: background .15s, transform .1s;
}
.nav-cta:hover { background: var(--accent-hi); transform: translateY(-1px); }

/* ---------- Hero ---------- */
.hero { padding: 132px 0 72px; }
.hero-grid {
  display: grid; grid-template-columns: 1.02fr 1.1fr; gap: 56px; align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 500;
  color: var(--accent); letter-spacing: 0.02em;
  background: var(--accent-dim); border: 1px solid rgba(232,86,42,0.22);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 {
  font-size: 52px; line-height: 1.06; letter-spacing: -0.035em; font-weight: 700;
  margin-bottom: 20px;
}
.hero h1 .u { color: var(--accent); }
.hero .lede { font-size: 18px; color: var(--ink-dim); max-width: 480px; margin-bottom: 28px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px;
  padding: 13px 24px; border-radius: 999px; transition: all .15s; cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hi); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: var(--bg-card); color: var(--ink); border-color: var(--border-hi); }
.btn-ghost:hover { border-color: var(--ink); }
.hero-meta { font-family: 'JetBrains Mono', monospace; font-size: 12.5px; color: var(--ink-mute); margin-top: 18px; }

/* Product image slot — placeholder until IM-2 assets land */
.media-slot {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background:
    linear-gradient(135deg, #EFECE5 0%, #E4E0D7 60%, #D9D4C9 100%);
  border: 1px solid var(--border-hi); box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center;
}
.media-slot.square { aspect-ratio: 1 / 1; }
.media-slot.wide43 { aspect-ratio: 4 / 3; }
.media-slot .ph {
  text-align: center; color: var(--ink-mute); font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px; line-height: 1.7; padding: 20px;
}
.media-slot .ph b { color: var(--ink-dim); display: block; font-size: 13.5px; margin-bottom: 4px; }
.media-slot .ph .frame {
  display: inline-block; border: 1.5px dashed var(--border-hi); border-radius: 8px;
  padding: 10px 16px; margin-bottom: 12px; color: var(--ink-mute);
}
/* subtle machined grid so a placeholder still reads "industrial device", not "AI blob" */
.media-slot::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(22,24,28,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,24,28,0.035) 1px, transparent 1px);
  background-size: 28px 28px;
}
/* when a real IM-2 concept render fills the slot: cover it, drop the placeholder grid */
.media-slot.has-img { background: #E4E0D7; }
.media-slot.has-img::after { display: none; }
.media-slot.has-img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Section scaffolding ---------- */
section { padding: 72px 0; }
.band-alt { background: var(--bg-alt); }
.band-ink { background: var(--bg-ink); color: var(--ink-on-dark); }
.band-ink .sec-kicker { color: var(--accent-hi); }
.band-ink .ink-dim { color: #B9BCC4; }
.sec-kicker {
  font-family: 'JetBrains Mono', monospace; font-size: 12.5px; font-weight: 600;
  color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px;
}
.sec-head { max-width: 640px; margin-bottom: 44px; }
.sec-head h2 { font-size: 34px; letter-spacing: -0.025em; line-height: 1.14; margin-bottom: 12px; }
.sec-head p { color: var(--ink-dim); font-size: 17px; }
.band-ink .sec-head p { color: #B9BCC4; }

/* feature row — one feature per scroll, image + copy alternating */
.feat-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center;
  padding: 24px 0;
}
.feat-row.flip .feat-copy { order: 2; }
.feat-copy h3 { font-size: 25px; letter-spacing: -0.02em; margin-bottom: 12px; }
.feat-copy p { color: var(--ink-dim); font-size: 16px; margin-bottom: 14px; }
.feat-copy .proof {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--ink-mute);
  border-left: 3px solid var(--accent); padding-left: 12px;
}

/* pillars grid */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pillar {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.pillar .ic {
  width: 40px; height: 40px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent-dim); color: var(--accent); font-weight: 700; margin-bottom: 16px;
  font-family: 'JetBrains Mono', monospace; font-size: 18px;
}
.pillar h3 { font-size: 18px; margin-bottom: 8px; letter-spacing: -0.01em; }
.pillar p { color: var(--ink-dim); font-size: 14.5px; }

/* ---------- Spec table ---------- */
.spec-wrap { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.spec-group { border-bottom: 1px solid var(--border); }
.spec-group:last-child { border-bottom: none; }
.spec-group-h {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent); background: var(--bg-alt);
  padding: 12px 22px;
}
.spec-row {
  display: grid; grid-template-columns: 220px 1fr; gap: 20px;
  padding: 13px 22px; border-top: 1px solid var(--border); font-size: 14.5px;
}
.spec-row:first-of-type { border-top: none; }
.spec-row .k { color: var(--ink-dim); }
.spec-row .v { color: var(--ink); font-family: 'JetBrains Mono', monospace; font-size: 13.5px; }
.spec-row .v .todo { color: var(--ink-mute); font-style: italic; }
.spec-note { font-size: 12.5px; color: var(--ink-mute); margin-top: 14px; line-height: 1.7; }
.spec-note sup { color: var(--accent); }

/* ---------- Waitlist / preorder ---------- */
.wl-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 40px; box-shadow: var(--shadow-md); max-width: 560px; margin: 0 auto;
}
.wl-card h2 { font-size: 30px; letter-spacing: -0.025em; margin-bottom: 10px; }
.wl-card p.sub { color: var(--ink-dim); margin-bottom: 26px; }
.wl-form { display: flex; gap: 10px; flex-wrap: wrap; }
.wl-form input {
  flex: 1; min-width: 220px; padding: 13px 16px; border-radius: 999px;
  border: 1px solid var(--border-hi); background: var(--bg); font-size: 15px; color: var(--ink);
  font-family: inherit;
}
.wl-form input:focus { outline: none; border-color: var(--accent); }
.wl-terms {
  margin-top: 22px; font-size: 13px; color: var(--ink-mute); line-height: 1.7;
  border-top: 1px solid var(--border); padding-top: 18px;
}
.wl-terms b { color: var(--ink-dim); }

/* trust row */
.trust-row {
  display: flex; gap: 34px; flex-wrap: wrap; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--ink-mute);
}
.trust-row .t b { color: var(--ink-dim); }

/* ---------- About ---------- */
.about-wrap { max-width: 720px; margin: 0 auto; }
.about-wrap h1 { font-size: 40px; letter-spacing: -0.03em; margin-bottom: 24px; }
.about-wrap p { color: var(--ink-dim); font-size: 17px; margin-bottom: 20px; }
.about-wrap p strong { color: var(--ink); }
.entity-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 24px; margin-top: 32px; font-family: 'JetBrains Mono', monospace; font-size: 14px;
  box-shadow: var(--shadow-sm);
}
.entity-card .row { display: flex; justify-content: space-between; padding: 7px 0; color: var(--ink-dim); }
.entity-card .row span:last-child { color: var(--ink); }

/* ---------- Footer ---------- */
footer { background: var(--bg-ink); color: var(--ink-on-dark); padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-legal { font-size: 13px; color: #9DA1A9; }
.footer-legal a { color: #C4C7CD; }
.footer-legal a:hover { color: #fff; }
.footer-legal .entity { color: #E4E6EA; }

/* ---------- misc ---------- */
.render-badge {
  display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 11px;
  color: var(--ink-mute); background: rgba(22,24,28,0.05); border: 1px solid var(--border);
  padding: 3px 8px; border-radius: 6px; margin-top: 10px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 40px; }
  .feat-row, .feat-row.flip { grid-template-columns: 1fr; gap: 28px; }
  .feat-row.flip .feat-copy { order: 0; }
  .pillars { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .spec-row { grid-template-columns: 1fr; gap: 4px; }
}