:root {
  --ink: #0b1b2b;
  --ink-2: #3a4a5c;
  --muted: #6b7a8c;
  --bg: #ffffff;
  --bg-2: #f4f7fa;
  --line: #e2e8ef;
  --rho: #0072B2;
  --mu: #D55E00;
  --gamma: #009E73;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { display: block; }
a { color: inherit; }
.wrap { width: min(1100px, 100% - 32px); margin-inline: auto; }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.88); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.word { font-weight: 800; font-size: 1.3rem; letter-spacing: -.02em; }
.word span { color: var(--rho); }
.tm { font-size: .65rem; color: var(--muted); margin-left: -6px; }
nav { display: flex; align-items: center; gap: 22px; }
nav a { text-decoration: none; color: var(--ink-2); font-size: .95rem; }
nav a:hover { color: var(--ink); }

/* Buttons */
.btn { display: inline-block; padding: 12px 22px; border-radius: 999px; background: var(--ink); color: #fff !important; text-decoration: none; font-weight: 600; transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(11,27,43,.18); }
.btn-small { padding: 8px 16px; font-size: .9rem; }
.btn-ghost { background: transparent; color: var(--ink) !important; border: 1.5px solid var(--line); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 96px 0 120px; background: radial-gradient(1000px 400px at 80% -10%, rgba(0,114,178,.10), transparent), radial-gradient(800px 360px at 0% 110%, rgba(0,158,115,.08), transparent); }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--rho); margin: 0 0 14px; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); line-height: 1.05; letter-spacing: -.035em; margin: 0 0 22px; }
.grad { background: linear-gradient(90deg, var(--rho), var(--gamma) 55%, var(--mu)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--ink-2); max-width: 640px; margin: 0 0 32px; }
.rho { color: var(--rho); } .mu { color: var(--mu); } .gamma { color: var(--gamma); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.track { position: absolute; left: 0; right: 0; bottom: 18px; width: 100%; height: 70px; }
.track path { fill: none; stroke: var(--rho); stroke-width: 2; opacity: .35; stroke-dasharray: 8 8; animation: flow 6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -160; } }
@media (prefers-reduced-motion: reduce) { .track path { animation: none; } html { scroll-behavior: auto; } }

/* Sections */
.section { padding: 88px 0; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -.025em; margin: 0 0 12px; }
.sub { color: var(--ink-2); max-width: 640px; margin: 0 0 40px; font-size: 1.05rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; background: #fff; position: relative; overflow: hidden; }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--c); }
.card .sym { font-size: 2.2rem; font-weight: 700; color: var(--c); font-family: Georgia, "Times New Roman", serif; font-style: italic; line-height: 1; margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 1.2rem; }
.card p { margin: 0; color: var(--ink-2); }
.c-rho { --c: var(--rho); } .c-mu { --c: var(--mu); } .c-gamma { --c: var(--gamma); }

.band { background: var(--ink); color: #dfe7ef; }
.why { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; padding: 64px 0; }
.why h3 { color: #fff; margin: 0 0 6px; font-size: 1.1rem; }
.why p { margin: 0; color: #b9c6d3; }

.tags { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 12px; }
.tags li { padding: 10px 18px; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); font-weight: 500; }

.contact { text-align: center; }
.contact .sub { margin-inline: auto; }

/* Footer */
.foot { border-top: 1px solid var(--line); background: var(--bg-2); }
.foot-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding: 24px 0; color: var(--muted); font-size: .88rem; }
.foot p { margin: 0; }

@media (max-width: 640px) {
  nav a:not(.btn) { display: none; }
  .hero { padding: 64px 0 100px; }
  .section { padding: 64px 0; }
}