:root {
  --cream-50: #faf8f5;
  --cream-100: #f0ede8;
  --paper: #fffefb;
  --text-900: #2c2c2e;
  --text-600: #606062;
  --sage-700: #4a6b5a;
  --sage-500: #6b8e7d;
  --slate-500: #5c6b7a;
  --amber-500: #c4956a;
  --error-500: #b85c5c;
  --shadow-soft: 0 18px 45px rgba(74, 107, 90, 0.12);
  --shadow-lite: 0 10px 25px rgba(44, 44, 46, 0.08);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Zen Kaku Gothic New", sans-serif;
  color: var(--text-900);
  background:
    radial-gradient(circle at 15% 10%, rgba(196, 149, 106, 0.16), transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(107, 142, 125, 0.2), transparent 38%),
    linear-gradient(160deg, var(--cream-50) 0%, var(--cream-100) 100%);
  line-height: 1.7;
  min-height: 100vh;
}

.bg-orb {
  position: fixed;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  filter: blur(36px);
  pointer-events: none;
  opacity: 0.4;
  z-index: -1;
  animation: float 9s ease-in-out infinite;
}

.orb-a {
  background: rgba(107, 142, 125, 0.32);
  top: -120px;
  right: -120px;
}

.orb-b {
  background: rgba(196, 149, 106, 0.3);
  bottom: -150px;
  left: -100px;
  animation-delay: 1.5s;
}

.hero,
main,
.site-footer {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 0 1rem;
}

.brand {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.pill-link {
  display: inline-block;
  text-decoration: none;
  color: var(--sage-700);
  border: 1px solid rgba(74, 107, 90, 0.3);
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  font-size: 0.88rem;
  transition: all 0.25s ease;
}

.pill-link:hover {
  background: rgba(107, 142, 125, 0.1);
}

.hero {
  padding-bottom: 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.2rem;
  align-items: center;
}

.eyebrow,
.section-label {
  display: inline-block;
  color: var(--sage-700);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 700;
  margin: 0 0 0.9rem;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
}

h1,
h2 {
  font-family: "Shippori Mincho", serif;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  margin-bottom: 1rem;
}

h1 span {
  color: var(--sage-700);
}

.lead {
  margin: 0;
  color: var(--text-600);
  max-width: 58ch;
  font-size: 1.04rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  margin: 1.55rem 0 1.4rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--sage-700), var(--sage-500));
  box-shadow: 0 8px 20px rgba(74, 107, 90, 0.25);
}

.btn-ghost {
  color: var(--sage-700);
  border: 1px solid rgba(74, 107, 90, 0.35);
  background: rgba(255, 255, 255, 0.55);
}

.quick-metrics {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 0.85rem;
}

.quick-metrics li {
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(92, 107, 122, 0.18);
  border-radius: var(--radius-md);
  padding: 0.8rem 0.8rem 0.7rem;
}

.quick-metrics strong {
  display: block;
  font-size: 1.6rem;
  color: var(--sage-700);
  line-height: 1.1;
  font-family: "Shippori Mincho", serif;
}

.quick-metrics span {
  font-size: 0.8rem;
  color: var(--text-600);
}

.hero-visual {
  justify-self: center;
}

.phone-frame {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(92, 107, 122, 0.18);
  border-radius: 36px;
  box-shadow: var(--shadow-soft);
  width: min(100%, 340px);
  text-align: center;
  padding: 2rem 1.3rem 1.4rem;
  position: relative;
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 6px;
  border-radius: 999px;
  background: rgba(44, 44, 46, 0.2);
}

.phone-frame img {
  width: 136px;
  height: 136px;
  border-radius: 30px;
  box-shadow: var(--shadow-lite);
}

.visual-title {
  margin: 1rem 0 0.2rem;
  font-size: 1.08rem;
  font-weight: 700;
}

.visual-subtitle {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-600);
}

main {
  padding-bottom: 3rem;
}

.section {
  margin: 2.2rem 0;
  padding: 1.8rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.63);
  border: 1px solid rgba(92, 107, 122, 0.15);
  box-shadow: var(--shadow-lite);
}

.section-head {
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.section-text {
  margin: 0;
  max-width: 72ch;
  color: var(--text-600);
}

.quote-card {
  margin-top: 1.1rem;
  border-left: 4px solid var(--amber-500);
  background: rgba(196, 149, 106, 0.1);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1rem 1rem 1.1rem;
}

.quote-card p {
  margin: 0;
}

.timeline-grid,
.feature-grid {
  display: grid;
  gap: 0.95rem;
}

.timeline-grid {
  grid-template-columns: repeat(2, minmax(220px, 1fr));
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(180px, 1fr));
}

.timeline-card,
.feature-card {
  background: var(--paper);
  border-radius: var(--radius-md);
  border: 1px solid rgba(92, 107, 122, 0.16);
  padding: 1rem;
}

.timeline-card h3,
.feature-card h3 {
  margin-bottom: 0.32rem;
  font-size: 1.08rem;
}

.timeline-card p,
.feature-card p {
  font-size: 0.94rem;
  color: var(--text-600);
}

.timeline-card p {
  margin: 0.24rem 0 0;
}

.feature-card p {
  margin: 0;
}

.lesson-meta {
  margin-top: 0.7rem;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sage-700);
  font-weight: 700;
}

.stack-panel {
  display: grid;
  gap: 1rem;
}

.chip-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.chip-list li {
  border-radius: 999px;
  padding: 0.35rem 0.78rem;
  border: 1px solid rgba(74, 107, 90, 0.25);
  background: rgba(107, 142, 125, 0.09);
  font-size: 0.86rem;
  font-weight: 500;
}

.stack-panel p {
  margin: 0;
  color: var(--text-600);
}

.site-footer {
  padding: 0.3rem 0 2.4rem;
}

.site-footer p {
  margin: 0;
  color: var(--text-600);
  font-size: 0.88rem;
  text-align: center;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.delay-1 {
  transition-delay: 0.12s;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    width: 100%;
  }

  .timeline-grid,
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 700px) {
  .hero,
  main,
  .site-footer {
    width: min(calc(100% - 1rem), var(--container));
  }

  .top-nav {
    padding-top: 1rem;
  }

  .quick-metrics {
    grid-template-columns: 1fr;
  }

  .timeline-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 1.2rem;
    border-radius: 18px;
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(18px);
  }
}