:root {
  --bg: #ffffff;
  --bg-band: #f5f7f8;
  --ink: #12181f;
  --muted: #55606b;
  --line: #dde3e8;
  --accent: #0f7b6c;
  --accent-ink: #ffffff;
  --accent-soft: #e3f3f0;
  --radius: 12px;
  --wrap: 1080px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1317;
    --bg-band: #151b20;
    --ink: #e9eef2;
    --muted: #a3afb9;
    --line: #2a333b;
    --accent: #3cc2ad;
    --accent-ink: #06201c;
    --accent-soft: #15302c;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
section { padding: 72px 0; scroll-margin-top: 64px; }
.band { background: var(--bg-band); }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-row { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 1.05rem; white-space: nowrap; }
.nav nav { display: flex; align-items: center; gap: 22px; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav nav a:hover { color: var(--ink); }
.nav nav a.btn { color: var(--accent-ink); }

/* buttons */
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 12px 22px; border-radius: 999px; text-decoration: none; font-weight: 600; border: 1px solid var(--accent); }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.small { padding: 6px 14px; font-size: .9rem; }
.btn.big { font-size: 1.15rem; padding: 14px 28px; }

/* hero */
.hero { padding: 96px 0 80px; }
.eyebrow, .tag { text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; font-weight: 700; color: var(--accent); margin: 0 0 12px; }
.lead { font-size: 1.25rem; color: var(--muted); max-width: 680px; }
.sub { color: var(--muted); max-width: 720px; margin-bottom: 32px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

/* cards */
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.band .card { background: var(--bg); }
.card p { margin: 0 0 .6em; }
.card ul { margin: 0; padding-left: 1.1em; }
.card li { margin: .3em 0; }
.meta { color: var(--muted); font-size: .9rem; margin-top: auto !important; padding-top: 8px; border-top: 1px solid var(--line); }
.course { display: flex; flex-direction: column; }
.plan-for { color: var(--muted); }
.plan.featured { border: 2px solid var(--accent); }
.note { color: var(--muted); font-size: .95rem; margin-top: 24px; }

/* two-column sections */
.two-col { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.steps { padding-left: 1.2em; }
.steps li { margin: .6em 0; }
.event { background: var(--accent-soft) !important; border-color: transparent; }
.event .btn { margin-top: 8px; }
.facts ul { padding-left: 1.1em; }

/* contact + footer */
.contact { text-align: center; }
.contact .sub { margin-left: auto; margin-right: auto; }
footer { border-top: 1px solid var(--line); padding: 28px 0; }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: .9rem; }
.foot p { margin: 0; }
.fine { max-width: 560px; }

@media (max-width: 860px) {
  .grid.three, .two-col { grid-template-columns: 1fr; }
  .nav nav a:not(.btn) { display: none; }
  section { padding: 56px 0; }
  .hero { padding: 64px 0 56px; }
}