:root{
  --navy:#08245c;
  --teal:#078f99;
  --orange:#ec6542;
  --purple:#7561c8;
  --yellow:#f4bd42;
  --paper:#fffdf8;
  --ink:#10204b;
  --muted:#59657d;
  --line:#dfe7f1;
  --soft:#f7f8fc;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(circle at 4% 2%, rgba(7,143,153,.14), transparent 18rem),
    radial-gradient(circle at 94% 4%, rgba(244,189,66,.18), transparent 18rem),
    radial-gradient(circle at 94% 50%, rgba(117,97,200,.10), transparent 20rem),
    var(--paper);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Sans",Meiryo,sans-serif;
  line-height:1.65;
}
body::before{
  content:"";
  position:fixed; inset:0; z-index:-1; pointer-events:none;
  background-image:radial-gradient(var(--teal) 1.4px, transparent 1.4px);
  background-size:34px 34px;
  opacity:.06;
}
.site-header{
  position:sticky; top:0; z-index:30;
  display:flex; align-items:center; justify-content:space-between;
  padding:18px clamp(20px,5vw,76px);
  background:rgba(255,253,248,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(8,36,92,.08);
}
.brand{
  color:var(--navy); text-decoration:none; font-weight:950;
  font-size:24px; letter-spacing:-.03em;
}
nav{display:flex; gap:22px; flex-wrap:wrap}
nav a{color:var(--ink); text-decoration:none; font-weight:850; font-size:16px}
main{overflow:hidden}
.eyebrow{
  margin:0 0 10px;
  color:var(--teal);
  font-size:18px;
  font-weight:950;
  letter-spacing:.04em;
}
h1{
  margin:0 0 20px;
  color:var(--navy);
  font-size:clamp(64px,8vw,124px);
  line-height:.9;
  letter-spacing:-.065em;
}
h2{
  margin:0 0 24px;
  color:var(--navy);
  font-size:clamp(38px,4.5vw,68px);
  line-height:1.04;
  letter-spacing:-.045em;
}
h3{
  margin:0 0 12px;
  color:var(--navy);
  font-size:26px;
  line-height:1.15;
}
p,li{font-size:clamp(19px,1.45vw,24px); margin:0 0 16px}
.hero{
  display:grid;
  grid-template-columns:.86fr 1.14fr;
  gap:36px;
  align-items:center;
  padding:76px clamp(20px,5vw,76px) 30px;
}
.hero h2{
  color:var(--teal);
  font-size:clamp(34px,3.8vw,60px);
}
.lead{
  font-size:clamp(22px,1.7vw,30px);
  color:#1c3266;
  font-weight:650;
}
.hero-illustration{
  background:white;
  border:1px solid var(--line);
  border-radius:34px;
  overflow:hidden;
  box-shadow:0 24px 70px rgba(8,36,92,.14);
}
.hero-illustration img{
  width:100%;
  height:470px;
  object-fit:cover;
  object-position:center;
  display:block;
}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  padding:30px clamp(20px,5vw,76px) 58px;
}
.feature-grid article{
  background:rgba(255,255,255,.88);
  border:1px solid var(--line);
  border-radius:26px;
  padding:18px 24px 26px;
  box-shadow:0 14px 34px rgba(8,36,92,.07);
}
.feature-grid img{
  width:100%;
  height:160px;
  object-fit:cover;
  object-position:center;
  border-radius:18px;
  background:white;
  margin-bottom:16px;
}
.about-section{
  display:grid;
  grid-template-columns:.78fr 1.22fr;
  gap:34px;
  padding:72px clamp(20px,5vw,76px);
  background:rgba(8,36,92,.035);
}
.about-text{
  align-self:center;
  padding:20px 0 20px 28px;
  border-left:8px solid var(--teal);
}
.activity-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.activity-cards article{
  background:white;
  border:1px solid var(--line);
  border-radius:24px;
  overflow:hidden;
  box-shadow:0 14px 34px rgba(8,36,92,.08);
}
.activity-cards img{
  width:100%;
  height:230px;
  object-fit:cover;
  object-position:center;
  display:block;
}
.activity-cards h3,.activity-cards p{padding-left:20px; padding-right:20px}
.activity-cards h3{padding-top:20px}
.activity-cards p{padding-bottom:20px; font-size:19px}
.flow-section{
  padding:72px clamp(20px,5vw,76px);
  text-align:center;
}
.timeline{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  text-align:left;
}
.timeline article{
  background:white;
  border:1px solid var(--line);
  border-top:9px solid var(--teal);
  border-radius:26px;
  padding:28px;
  box-shadow:0 14px 34px rgba(8,36,92,.07);
}
.timeline article:nth-child(2){border-top-color:var(--purple)}
.timeline article:nth-child(3){border-top-color:var(--orange)}
.timeline span{
  width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
  color:white;background:var(--teal);font-size:28px;font-weight:950;margin-bottom:14px;
}
.timeline article:nth-child(2) span{background:var(--purple)}
.timeline article:nth-child(3) span{background:var(--orange)}
.timeline strong{
  display:inline-block;
  margin-top:8px;
  padding:8px 15px;
  border-radius:999px;
  background:var(--soft);
  color:var(--navy);
  font-size:18px;
}
.learning-section{
  display:grid;
  grid-template-columns:.75fr 1.25fr;
  gap:34px;
  padding:72px clamp(20px,5vw,76px);
}
.learning-list{
  display:grid;
  gap:18px;
}
.learning-list article{
  padding:26px 26px 26px 96px;
  border:1px solid var(--line);
  border-radius:24px;
  background:white;
  box-shadow:0 14px 34px rgba(8,36,92,.07);
  position:relative;
}
.learning-list article::before{
  content:"";
  position:absolute; left:26px; top:30px;
  width:48px;height:48px;border-radius:50%;
  background:var(--teal);
}
.learning-list article:nth-child(2)::before{background:var(--purple)}
.learning-list article:nth-child(3)::before{background:var(--orange)}
.related-section{
  padding:72px clamp(20px,5vw,76px);
  background:linear-gradient(180deg,rgba(8,36,92,.04),rgba(7,143,153,.08));
}
.project-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.project-card{
  display:flex; flex-direction:column; gap:8px;
  background:white;
  color:var(--ink);
  text-decoration:none;
  border:1px solid var(--line);
  border-radius:24px;
  padding:14px;
  box-shadow:0 14px 34px rgba(8,36,92,.08);
  transition:.2s transform,.2s box-shadow;
}
.project-card:hover{transform:translateY(-5px);box-shadow:0 22px 48px rgba(8,36,92,.16)}
.project-card img{
  width:100%;
  height:145px;
  object-fit:cover;
  border-radius:16px;
  border:1px solid var(--line);
  background:white;
}
.project-card h3{font-size:22px;margin-top:5px}
.project-card p{font-size:18px}
.project-card span{
  align-self:flex-start;
  margin-top:auto;
  padding:8px 16px;
  color:white;
  background:var(--teal);
  border-radius:999px;
  font-weight:900;
  font-size:16px;
}
.instructor-section{
  margin:0 clamp(20px,5vw,76px) 72px;
  padding:34px;
  display:grid;
  grid-template-columns:250px 1fr;
  gap:34px;
  align-items:center;
  background:var(--navy);
  color:white;
  border-radius:30px;
  box-shadow:0 24px 60px rgba(8,36,92,.18);
}
.instructor-section .eyebrow,.instructor-section h2{color:white}
.instructor-section h2 span{font-size:.72em;color:#dffdfb}
.instructor-photo img{
  width:250px;
  height:250px;
  object-fit:cover;
  object-position:center;
  border-radius:28px;
  border:6px solid rgba(255,255,255,.35);
  background:white;
}
.contact a{color:white;font-weight:950}
footer{
  padding:28px clamp(20px,5vw,76px);
  background:#061943;
  color:white;
}
footer p{margin:0;font-size:16px}

@media(max-width:1000px){
  .hero,.about-section,.learning-section,.instructor-section{grid-template-columns:1fr}
  .feature-grid,.activity-cards,.timeline,.project-grid{grid-template-columns:1fr}
  nav{display:none}
  .hero{padding-top:48px}
  .hero-illustration img{height:360px}
  .feature-grid img,.activity-cards img{height:240px}
  .instructor-photo img{width:210px;height:210px}
}