:root {
  --deep: #12372a;
  --mint: #42d6a4;
  --ink: #15231d;
  --muted: #65736c;
  --line: #dfe7e2;
  --soft: #f2f7f4;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: Inter, 'Noto Sans SC', 'Noto Sans JP', Arial, sans-serif;
  color: var(--ink);
}
a {
  text-decoration: none;
  color: inherit;
}
.top {
  height: 78px;
  display: flex;
  align-items: center;
  padding: 0 6%;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: #fffc;
  backdrop-filter: blur(14px);
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-crop {
  width: 43px;
  height: 43px;
  overflow: hidden;
  display: block;
  position: relative;
}
.brand-crop img {
  height: 43px;
  width: auto;
  position: absolute;
  left: 0;
  top: 0;
  transform: scale(3.9);
  transform-origin: left center;
}
.brand-copy {
  display: grid;
}
.brand-copy b {
  font-size: 18px;
}
.brand-copy small {
  font-size: 9px;
  color: var(--muted);
}
nav {
  display: flex;
  gap: 30px;
  margin-left: 55px;
  font-size: 13px;
}
.top-right {
  margin-left: auto;
  display: flex;
  gap: 20px;
  align-items: center;
  font-size: 12px;
}
.primary {
  background: var(--deep);
  color: white;
  padding: 12px 19px;
  border-radius: 10px;
}
.hero {
  min-height: 620px;
  padding: 90px 9%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 9%;
  align-items: center;
  background:
    radial-gradient(circle at 85% 30%, #c9f5e6, transparent 27%),
    linear-gradient(135deg, #f5faf7, #fff);
}
.eyebrow,
.section-head small,
.school > div > small {
  color: #15845f;
  font-size: 11px;
  letter-spacing: 2px;
  font-weight: 800;
}
.hero h1 {
  font-size: 55px;
  line-height: 1.13;
  letter-spacing: -2.5px;
  margin: 20px 0;
  max-width: 720px;
}
.hero-copy > p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
  max-width: 650px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  margin: 30px 0;
}
.secondary {
  padding: 12px 19px;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 11px;
}
.trust span:before {
  content: '✓';
  color: #15845f;
  margin-right: 5px;
}
.hero-panel {
  position: relative;
}
.lesson {
  background: #fff;
  border: 1px solid #dbe9e2;
  border-radius: 22px;
  padding: 30px;
  box-shadow: 0 35px 80px #12372a20;
}
.lesson small {
  color: #15845f;
}
.lesson h3 {
  font-size: 22px;
  margin: 20px 0 12px;
}
.lesson p {
  color: var(--muted);
  line-height: 1.8;
}
.lesson div {
  display: flex;
  justify-content: space-between;
  background: var(--soft);
  padding: 14px;
  border-radius: 10px;
  color: #15845f;
  font-size: 12px;
}
.progress {
  height: 8px;
  background: #dfeae4;
  border-radius: 5px;
  margin: 25px 25px;
}
.progress span {
  display: block;
  background: var(--mint);
  width: 58%;
  height: 100%;
  border-radius: 5px;
}
.brand-statement {
  background: var(--deep);
  color: #fff;
  padding: 22px 8%;
  display: flex;
  justify-content: space-between;
}
.brand-statement span {
  color: #b9cec5;
}
.section {
  padding: 90px 7%;
  max-width: 1400px;
  margin: auto;
}
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 35px;
}
.section-head h2 {
  font-size: 35px;
  margin: 8px 0;
}
.section-head a {
  color: #15845f;
  font-size: 13px;
}
.feature-grid,
.course-grid,
.teacher-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-grid article,
.course,
.mentor {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 25px;
}
.feature-grid i {
  width: 45px;
  height: 45px;
  border-radius: 12px;
  background: var(--deep);
  color: var(--mint);
  display: grid;
  place-items: center;
  font-style: normal;
  font-weight: bold;
}
.feature-grid p,
.course p,
.mentor p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.course-grid,
.teacher-grid {
  margin-top: 25px;
}
.course h3,
.mentor h3 {
  margin: 8px 0;
}
.course small,
.mentor small {
  color: #15845f;
}
.course strong {
  display: block;
  margin-top: 15px;
}
.school {
  margin: 20px 7%;
  border-radius: 25px;
  background: var(--deep);
  color: #fff;
  padding: 60px 7%;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 8%;
}
.school h2 {
  font-size: 36px;
}
.school p {
  color: #b7cbc2;
  line-height: 1.9;
}
.school a {
  display: inline-block;
  background: var(--mint);
  color: var(--deep);
  padding: 13px 20px;
  border-radius: 10px;
  margin-top: 14px;
}
.school-card {
  background: #ffffff10;
  border: 1px solid #ffffff30;
  padding: 35px;
  border-radius: 20px;
  display: grid;
}
.school-card b {
  font-size: 34px;
}
.school-card span {
  color: var(--mint);
}
.school-card small {
  color: #ffffff !important;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
}
footer {
  background: #0b271e;
  color: #fff;
  padding: 50px 7%;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}
footer > div {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
footer a,
footer p {
  color: #a9c0b6;
  font-size: 12px;
}
footer > small {
  grid-column: 1/-1;
  border-top: 1px solid #ffffff20;
  padding-top: 20px;
  color: #789187;
}
@media (max-width: 900px) {
  nav,
  .top-right > a:not(.primary) {
    display: none;
  }
  .hero,
  .school {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 70px 7%;
  }
  .hero h1 {
    font-size: 42px;
  }
  .feature-grid,
  .course-grid,
  .teacher-grid {
    grid-template-columns: 1fr 1fr;
  }
  .brand-statement {
    display: grid;
    gap: 8px;
  }
}
@media (max-width: 600px) {
  .top {
    padding: 0 4%;
  }
  .hero h1 {
    font-size: 35px;
  }
  .hero-panel {
    display: none;
  }
  .section {
    padding: 65px 18px;
  }
  .feature-grid,
  .course-grid,
  .teacher-grid {
    grid-template-columns: 1fr;
  }
  .school {
    margin: 10px 18px;
    padding: 40px 24px;
  }
  .school h2 {
    font-size: 28px;
  }
  .brand-copy small {
    font-size: 7px;
  }
  .top-right {
    display: flex;
  }
  .section-head {
    align-items: start;
  }
}
.mentor-avatar {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  object-fit: cover;
}