:root {
  --bg: #0a0a12;
  --bg-2: #11111c;
  --card: #151524;
  --line: #25253a;
  --text: #ececf5;
  --muted: #9a9ab5;
  --accent: #7c5cff;
  --accent-2: #20d3b0;
  --accent-soft: rgba(124, 92, 255, 0.14);
  --radius: 18px;
  --max: 1120px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7fb;
    --bg-2: #ffffff;
    --card: #ffffff;
    --line: #e3e3ee;
    --text: #151522;
    --muted: #5d5d78;
    --accent: #5b3df5;
    --accent-2: #0fa88a;
    --accent-soft: rgba(91, 61, 245, 0.09);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img, svg { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: 0.02em; text-decoration: none; }
.logo b { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav { display: flex; gap: 24px; font-size: 15px; color: var(--muted); }
.nav a { text-decoration: none; }
.nav a:hover { color: var(--text); }
@media (max-width: 760px) { .nav { display: none; } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px; font-weight: 650; font-size: 16px;
  text-decoration: none; border: 1px solid transparent; transition: transform .15s ease, opacity .15s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(90deg, var(--accent), #9b6bff); color: #fff; box-shadow: 0 8px 30px -8px var(--accent); }
.btn-ghost { border-color: var(--line); background: var(--bg-2); }
.btn-sm { padding: 9px 16px; font-size: 14px; }

/* hero */
.hero { padding: 88px 0 56px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto; height: 620px; z-index: -1;
  background:
    radial-gradient(40% 50% at 30% 40%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 70%),
    radial-gradient(35% 45% at 75% 30%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero { padding-top: 56px; } }
.eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 20px; letter-spacing: .02em;
}
h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.05; margin: 0 0 20px; letter-spacing: -0.02em; }
h1 .grad { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--muted); max-width: 560px; margin: 0 0 32px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.note { font-size: 14px; color: var(--muted); margin-top: 16px; }

.radar-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 24px; padding: 24px;
  box-shadow: 0 30px 80px -40px rgba(0,0,0,.5);
}
.radar-card .cap { display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.radar-card .cap b { color: var(--text); }
.radar text { font-size: 11px; fill: var(--muted); }
.radar .grid { fill: none; stroke: var(--line); }
.radar .before { fill: color-mix(in srgb, var(--muted) 16%, transparent); stroke: var(--muted); stroke-dasharray: 4 4; }
.radar .after { fill: color-mix(in srgb, var(--accent) 30%, transparent); stroke: var(--accent); stroke-width: 2; }
.legend { display: flex; gap: 16px; font-size: 13px; color: var(--muted); margin-top: 8px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }

/* sections */
section { padding: 72px 0; }
.section-alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.01em; }
.sub { color: var(--muted); margin: 0 0 40px; max-width: 640px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.step { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: .08em; margin-bottom: 14px; }

.skills { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 900px) { .skills { grid-template-columns: repeat(2, 1fr); } }
.skill { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.skill .ic { font-size: 22px; margin-bottom: 8px; }
.skill b { display: block; font-size: 16px; }
.skill span { font-size: 14px; color: var(--muted); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.stat { font-size: 44px; font-weight: 800; line-height: 1; margin-bottom: 8px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.principles { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.principles li { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; }
.principles b { display: block; margin-bottom: 2px; }
.principles span { color: var(--muted); font-size: 16px; }

details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 22px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin: 12px 0 0; }

.final { text-align: center; }
.final .cta { justify-content: center; }
.final .sub { margin-left: auto; margin-right: auto; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); }

/* legal pages */
.doc { max-width: 780px; margin: 0 auto; padding: 56px 20px 80px; }
.doc h1 { font-size: clamp(30px, 4.5vw, 42px); }
.doc h2 { font-size: 24px; margin: 40px 0 12px; }
.doc p, .doc li { color: var(--text); }
.doc .meta { color: var(--muted); font-size: 15px; margin-bottom: 32px; }
.doc ul { padding-left: 22px; }
.doc li { margin-bottom: 6px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-2); }
.todo { background: rgba(255, 184, 0, 0.16); border-radius: 4px; padding: 0 4px; }
.back { display: inline-block; margin-bottom: 24px; color: var(--muted); text-decoration: none; font-size: 15px; }