:root {
  --bg: #070b12;
  --bg-2: #0b111c;
  --surface: #0e1520;
  --surface-2: #121b28;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eef7;
  --muted: #95a6bd;
  --faint: #62748c;
  --accent: #5b9dff;
  --accent-2: #37e0c8;
  --accent-grad: linear-gradient(135deg, #5b9dff 0%, #37e0c8 100%);
  --danger: #f5a623;
  --maxw: 1160px;
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- background texture ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(91, 157, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 157, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 700px;
  z-index: -1;
  background: radial-gradient(circle at 50% 30%, rgba(55, 224, 200, 0.10), transparent 55%),
              radial-gradient(circle at 30% 20%, rgba(91, 157, 255, 0.14), transparent 60%);
  filter: blur(20px);
  pointer-events: none;
}

/* ---------- header ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 18, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: -0.02em; font-size: 1.15rem; }
.brand .mark { width: 30px; height: 30px; }
.brand .suffix { color: var(--faint); font-weight: 500; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { color: var(--muted); font-size: 0.92rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 9px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text);
  transition: all 0.2s;
}
.nav-cta:hover { border-color: var(--accent); background: rgba(91, 157, 255, 0.08); }
.nav-toggle { display: none; background: none; border: 0; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* ---------- hero ---------- */
.hero { padding: 110px 0 90px; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 7px 15px;
  margin-bottom: 30px;
  background: rgba(55, 224, 200, 0.05);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); }
.hero h1 {
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 700;
  max-width: 15ch;
  margin: 0 auto 26px;
}
.hero h1 .grad { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero p.lede {
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  color: var(--muted);
  max-width: 60ch;
  margin: 0 auto 40px;
}
.btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  padding: 14px 26px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: all 0.22s;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent-grad); color: #04121b; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(55, 224, 200, 0.28); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); background: rgba(91, 157, 255, 0.07); }

/* ---------- stat strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-top: 20px; }
.stat { background: var(--surface); padding: 26px 22px; text-align: center; }
.stat .n { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.02em; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .l { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }

/* ---------- sections ---------- */
section { padding: 84px 0; }
.section-head { max-width: 62ch; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.label { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
h2 { font-size: clamp(1.7rem, 4vw, 2.7rem); letter-spacing: -0.03em; line-height: 1.12; font-weight: 700; }
h2 + p { color: var(--muted); font-size: 1.08rem; margin-top: 18px; }
.divider { height: 1px; background: var(--border); border: 0; }

/* ---------- problem list ---------- */
.problem-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.prob {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.25s, transform 0.25s;
}
.prob:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.prob h3 { font-size: 1.08rem; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.prob h3 .idx { font-family: var(--mono); color: var(--danger); font-size: 0.9rem; }
.prob p { color: var(--muted); font-size: 0.96rem; }

/* ---------- arc ---------- */
.arc { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 10px; }
.arc-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 18px;
  position: relative;
}
.arc-step .step-n { font-family: var(--mono); font-size: 0.78rem; color: var(--accent-2); letter-spacing: 0.1em; }
.arc-step h4 { font-size: 1.05rem; margin: 10px 0 8px; }
.arc-step p { font-size: 0.88rem; color: var(--muted); }
.arc-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faint);
  z-index: 2;
}

/* ---------- three computers ---------- */
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tc {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
}
.tc.flag { border-color: rgba(55, 224, 200, 0.35); box-shadow: 0 0 0 1px rgba(55, 224, 200, 0.12), 0 20px 50px rgba(0,0,0,0.3); }
.tc .tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.tc.flag .tag { color: var(--accent-2); }
.tc h3 { font-size: 1.3rem; margin: 12px 0 12px; letter-spacing: -0.01em; }
.tc p { color: var(--muted); font-size: 0.96rem; }
.pill { display: inline-block; margin-top: 16px; font-size: 0.74rem; font-family: var(--mono); color: var(--accent-2); border: 1px solid rgba(55,224,200,0.3); padding: 4px 10px; border-radius: 100px; }

/* ---------- table ---------- */
.table-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 16px 22px; font-size: 0.96rem; border-bottom: 1px solid var(--border); }
thead th { background: var(--surface-2); font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
tbody tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--faint); }
td:last-child { color: var(--text); font-weight: 500; }
tbody tr:hover td { background: rgba(91,157,255,0.03); }

/* ---------- capability cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s, border-color 0.25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.card .ico { width: 46px; height: 46px; margin-bottom: 18px; color: var(--accent); }
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.95rem; }
.card .role { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 14px; }

/* ---------- etalon / feature split ---------- */
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
.split ul { list-style: none; margin-top: 22px; }
.split li { padding: 12px 0 12px 30px; position: relative; color: var(--muted); border-bottom: 1px solid var(--border); }
.split li::before { content: ""; position: absolute; left: 0; top: 19px; width: 12px; height: 12px; border-radius: 3px; background: var(--accent-grad); }
.split li strong { color: var(--text); font-weight: 600; }
.etalon-viz {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  font-family: var(--mono);
  font-size: 0.86rem;
}
.etalon-viz .row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--border); color: var(--muted); }
.etalon-viz .row:last-child { border: 0; }
.etalon-viz .ok { color: var(--accent-2); }

/* ---------- founder ---------- */
.founder { display: grid; grid-template-columns: 200px 1fr; gap: 42px; align-items: center; }
.founder-photo {
  width: 200px; height: 200px; border-radius: 20px;
  background: linear-gradient(135deg, #16324f, #0c2a2c);
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: 3.4rem; font-weight: 700; letter-spacing: -0.03em;
  color: var(--accent-2);
}
.founder h3 { font-size: 1.5rem; letter-spacing: -0.01em; }
.founder .who { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); letter-spacing: 0.08em; margin: 6px 0 16px; text-transform: uppercase; }
.founder p { color: var(--muted); margin-bottom: 12px; }
.founder a.link { color: var(--accent); border-bottom: 1px solid rgba(91,157,255,0.4); }

/* ---------- contact ---------- */
.contact {
  background: linear-gradient(150deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 56px;
  text-align: center;
}
.contact .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; text-align: left; }
.contact .box { border-top: 1px solid var(--border); padding-top: 18px; }
.contact .box .k { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin-bottom: 8px; }
.contact .box .v { color: var(--text); font-size: 0.98rem; }
.contact .box .v a { color: var(--accent); }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--border); padding: 44px 0; margin-top: 40px; }
.foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px; }
.foot .brand { font-size: 1rem; }
.foot-links { display: flex; gap: 24px; }
.foot-links a { color: var(--muted); font-size: 0.88rem; }
.foot-links a:hover { color: var(--text); }
.foot .legal { color: var(--faint); font-size: 0.82rem; width: 100%; border-top: 1px solid var(--border); padding-top: 20px; margin-top: 8px; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .problem-grid, .three, .cards, .contact .grid { grid-template-columns: 1fr; }
  .arc { grid-template-columns: 1fr; }
  .arc-step:not(:last-child)::after { content: "↓"; right: 50%; top: auto; bottom: -12px; transform: translateX(50%); }
  .split, .founder { grid-template-columns: 1fr; }
  .founder-photo { margin: 0 auto; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; background: var(--bg-2); padding: 20px 24px; border-bottom: 1px solid var(--border); gap: 18px; }
  .contact { padding: 36px 24px; }
}