:root {
  --bg: #ffffff;
  --bg-soft: #f0f7ff;
  --ink: #1a2540;
  --muted: #5c6a87;
  --line: #d9e3f2;
  --blue: #2563eb;
  --blue-deep: #1d4ed8;
  --sky: #4fc3f7;
  --yellow: #ffd54f;
  --orange: #ff8a65;
  --pink: #ff9ec7;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "M PLUS Rounded 1c", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.8;
  font-weight: 500;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

h1, h2, h3, p, dl, dd, ol, ul { margin: 0; padding: 0; }
ol, ul { list-style: none; }

.demo-banner {
  padding: 8px 16px;
  background: var(--blue);
  color: white;
  font-size: 12px;
  text-align: center;
  letter-spacing: 0.04em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 5vw, 56px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--sky) 100%);
  color: white;
  border-radius: 14px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.32);
}

.brand-name {
  font-size: 15px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav a:hover { color: var(--blue); }

.header-cta {
  padding: 11px 22px;
  background: var(--yellow);
  color: var(--ink);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  box-shadow: 0 10px 22px rgba(255, 213, 79, 0.45);
  transition: transform .18s, box-shadow .2s;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(255, 213, 79, 0.55);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(70px, 9vw, 120px) clamp(20px, 6vw, 80px) clamp(90px, 10vw, 140px);
  background:
    radial-gradient(circle at 90% 10%, rgba(255, 213, 79, 0.18), transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(79, 195, 247, 0.18), transparent 40%),
    var(--bg-soft);
}

.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: 0.85;
}

.shape-1 {
  top: 8%;
  right: 12%;
  width: 90px;
  height: 90px;
  background: var(--yellow);
}

.shape-2 {
  top: 36%;
  right: 4%;
  width: 60px;
  height: 60px;
  background: var(--orange);
  border-radius: 14px;
  transform: rotate(20deg);
}

.shape-3 {
  bottom: 12%;
  right: 26%;
  width: 70px;
  height: 70px;
  background: var(--sky);
}

.shape-4 {
  top: 64%;
  left: 6%;
  width: 50px;
  height: 50px;
  background: var(--pink);
  border-radius: 16px;
  transform: rotate(-12deg);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 22px;
  padding: 6px 16px;
  background: white;
  border-radius: 999px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
}

.hero h1 {
  margin-bottom: 26px;
  font-size: clamp(40px, 6.5vw, 76px);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.hero h1 .hl {
  position: relative;
  display: inline-block;
  color: var(--blue);
}

.hero h1 .hl::after {
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 14px;
  background: var(--yellow);
  border-radius: 999px;
  content: "";
  z-index: -1;
}

.hero .lead {
  max-width: 600px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 36px 0 40px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 900;
  font-size: 15px;
  transition: transform .18s, background .2s, color .2s, border-color .2s, box-shadow .2s;
}

.button.primary {
  background: var(--blue);
  color: white;
  box-shadow: 0 14px 32px rgba(37, 99, 235, 0.32);
}

.button.primary:hover {
  background: var(--blue-deep);
  transform: translateY(-2px);
}

.button.outline {
  background: white;
  color: var(--blue);
  border: 2px solid var(--blue);
}

.button.outline:hover {
  background: var(--bg-soft);
  transform: translateY(-1px);
}

.button.outline-light {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.button.outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
}

.button.large {
  min-height: 62px;
  padding: 14px 32px;
  font-size: 16px;
}

.button[aria-disabled="true"] {
  opacity: 0.65;
  cursor: not-allowed;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 560px;
}

.hero-stats div {
  padding: 16px;
  background: white;
  border-radius: 18px;
  text-align: center;
  box-shadow: 0 10px 28px rgba(26, 37, 64, 0.08);
}

.hero-stats strong {
  display: block;
  margin-bottom: 4px;
  color: var(--blue);
  font-size: 24px;
  font-weight: 900;
}

.hero-stats span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.section {
  padding: clamp(72px, 9vw, 120px) clamp(20px, 6vw, 80px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-heading.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading.center .eyebrow {
  display: inline-block;
}

.section h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.section-note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
}

.features {
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.features-grid article {
  padding: 40px 32px;
  background: white;
  border: 2px solid var(--line);
  border-radius: 24px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}

.features-grid article:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 24px 56px rgba(37, 99, 235, 0.12);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 22px;
  background: var(--c);
  border-radius: 20px;
  font-size: 30px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.features-grid h3 {
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 900;
}

.features-grid p {
  color: var(--muted);
  font-size: 14px;
}

.course {
  background: var(--bg-soft);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.course-card {
  position: relative;
  padding: 36px 28px;
  background: white;
  border-radius: 24px;
  box-shadow: 0 18px 44px rgba(26, 37, 64, 0.08);
  transition: transform .2s, box-shadow .2s;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 56px rgba(26, 37, 64, 0.14);
}

.course-card-mid {
  background: linear-gradient(160deg, white 0%, #fff8e1 100%);
  border: 2px solid var(--yellow);
}

.course-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 14px;
  background: var(--c);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.course-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 900;
}

.course-desc {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 14px;
}

.course-card ul {
  margin: 16px 0;
}

.course-card li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  font-weight: 600;
}

.course-card li + li {
  margin-top: 6px;
}

.course-card li::before {
  position: absolute;
  left: 0;
  content: "✦";
  color: var(--blue);
  font-weight: 900;
}

.course-price {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.course-price strong {
  color: var(--ink);
  font-size: 22px;
  font-weight: 900;
}

.schedule {
  background: var(--bg);
}

.schedule-list {
  display: grid;
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}

.schedule-list > div {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 20px 24px;
  background: var(--bg-soft);
  border-radius: 18px;
  border-left: 4px solid var(--blue);
}

.schedule-list .time {
  color: var(--blue);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.schedule-list h3 {
  margin-bottom: 4px;
  font-size: 17px;
  font-weight: 900;
}

.schedule-list p {
  color: var(--muted);
  font-size: 14px;
}

.voice {
  background: var(--bg-soft);
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.voice-grid article {
  position: relative;
  padding: 32px 26px;
  background: white;
  border-radius: 24px;
  box-shadow: 0 18px 40px rgba(26, 37, 64, 0.08);
}

.voice-grid article::before {
  position: absolute;
  top: -10px;
  left: 24px;
  content: "“";
  color: var(--yellow);
  font-size: 60px;
  font-weight: 900;
  line-height: 1;
}

.voice-grid p {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.85;
}

.voice-meta {
  display: block;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.trial {
  padding: clamp(80px, 10vw, 130px) clamp(20px, 6vw, 80px);
  background:
    radial-gradient(circle at 10% 20%, rgba(255, 213, 79, 0.25), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(79, 195, 247, 0.2), transparent 40%),
    linear-gradient(160deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: white;
}

.trial-box {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.trial .eyebrow {
  background: var(--yellow);
  color: var(--ink);
  box-shadow: none;
}

.trial h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
}

.trial > .trial-box > p {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 17px;
}

.trial-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 660px;
  margin: 36px auto 32px;
}

.trial-info div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  text-align: center;
}

.trial-info span {
  display: block;
  margin-bottom: 4px;
  color: var(--yellow);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.trial-info strong {
  font-size: 15px;
  font-weight: 800;
}

.trial .hero-actions {
  justify-content: center;
  margin: 0;
}

.trial .button.primary {
  background: var(--yellow);
  color: var(--ink);
  box-shadow: 0 14px 32px rgba(255, 213, 79, 0.45);
}

.trial .button.primary:hover {
  background: #ffca28;
}

.trial-note {
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
}

.site-footer {
  padding: 32px 20px;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  font-size: 13px;
}

.site-footer p { margin: 4px 0; }
.footer-note { font-size: 11px; color: rgba(255, 255, 255, 0.4); }

@media (max-width: 960px) {
  .features-grid,
  .course-grid,
  .voice-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .trial-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
    gap: 8px;
  }
  .nav { display: none; }
  .header-cta { padding: 9px 16px; font-size: 13px; }
  .brand-name { font-size: 13px; }
  .brand-logo { width: 36px; height: 36px; font-size: 18px; }
  .hero { padding: 50px 20px 70px; }
  .hero h1 { font-size: 36px; }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .hero-actions, .button { width: 100%; }
  .schedule-list > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}