:root{
  --bg:#ffffff;--bg2:#f4f6f8;--ink:#14202b;--muted:#5d6b78;--line:#e2e7ec;
  --acc:#1f9d6b;--acc-ink:#ffffff;--navy:#16232f;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:720px}
.center{text-align:center}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h2{font-size:30px}
h3{font-size:19px}

/* nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(22,35,47,.96);backdrop-filter:blur(6px);color:#fff}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none;font-size:18px}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--acc);font-size:14px;letter-spacing:.5px}
.nav nav{display:flex;align-items:center;gap:22px}
.nav nav a{text-decoration:none;font-size:15px;opacity:.85}
.nav nav a:hover{opacity:1}
.btn-sm{border:1px solid rgba(255,255,255,.35);padding:6px 14px;border-radius:8px;opacity:1!important}

/* hero */
.hero{background:var(--navy);color:#fff;padding:90px 0 100px;background-image:radial-gradient(circle at 85% 20%,rgba(31,157,107,.28),transparent 45%),radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:auto,22px 22px}
.eyebrow{color:#7fdcb5;font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:14px;margin:0 0 14px}
.hero h1{font-size:clamp(34px,5.5vw,56px);max-width:820px}
.lead{font-size:20px;color:#c5d1dc;max-width:640px;margin:0 0 30px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--acc);color:var(--acc-ink);text-decoration:none;font-weight:600;padding:12px 22px;border-radius:10px;transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.4);color:#fff}

/* sections */
.sec{padding:80px 0}
.sec-alt{background:var(--bg2)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin-top:10px}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}
.card p{color:var(--muted);margin:0;font-size:16px}
.ico{font-size:28px;margin-bottom:10px}

/* course */
.course{display:grid;grid-template-columns:1.6fr 1fr;gap:30px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:32px;margin-top:10px}
.course p{color:var(--muted)}
.tag{display:inline-block;background:#e3f5ed;color:#137a52;font-size:13px;font-weight:600;padding:3px 10px;border-radius:99px;margin-bottom:10px}
.checks{list-style:none;padding:0;margin:16px 0 0}
.checks li{padding-left:28px;position:relative;margin:6px 0}
.checks li::before{content:"✓";position:absolute;left:0;color:var(--acc);font-weight:700}
.course-side{background:var(--bg2);border-radius:12px;padding:24px;text-align:center}
.course-side p{color:var(--ink);font-weight:600;margin-top:0}

.mail{font-size:22px;font-weight:600}
.mail a{color:var(--acc)}

/* footer */
.foot{background:var(--navy);color:#c5d1dc;padding:24px 0;font-size:15px}
.foot-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.muted{opacity:.7}

@media (max-width:720px){
  .nav nav a:not(.btn-sm){display:none}
  .hero{padding:64px 0 72px}
  .hero h1 br{display:none}
  .lead{font-size:18px}
  .sec{padding:60px 0}
  .course{grid-template-columns:1fr;padding:22px}
  h2{font-size:26px}
}