/* style.css */
:root {
  --bg: #0b1020;
  --bg-soft: #121933;
  --card: rgba(255,255,255,0.06);
  --text: #e8ecf8;
  --muted: #b5bfd9;
  --line: rgba(255,255,255,0.12);
  --accent: #6ea8fe;
  --accent-2: #7ef0c5;
  --btn-text: #061225;
  --shadow: 0 20px 50px rgba(0,0,0,0.24);
}

body.light {
  --bg: #f6f8fc;
  --bg-soft: #eef3fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #53607a;
  --line: rgba(23,32,51,0.12);
  --accent: #2a68f6;
  --accent-2: #1fb98b;
  --btn-text: #ffffff;
  --shadow: 0 18px 35px rgba(20,33,61,0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, "Noto Sans JP", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 88px 0; }
.muted { background: var(--bg-soft); }

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-2);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head.left { margin-bottom: 20px; }

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 14px;
}

h1 { font-size: clamp(2rem, 4.4vw, 4.2rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 1.06rem; max-width: 700px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
  background: rgba(11,16,32,0.70);
  border-bottom: 1px solid var(--line);
}

body.light .site-header { background: rgba(246,248,252,0.82); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.brand { font-weight: 800; letter-spacing: -0.02em; }

.nav nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--btn-text);
  font-weight: 700;
  box-shadow: var(--shadow);
}

body:not(.light) .btn { color: #07111f; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
  box-shadow: none;
}

.btn-sm { min-height: 40px; padding: 0 16px; }

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at 10% 10%, rgba(110,168,254,0.20), transparent 30%),
    radial-gradient(circle at 85% 20%, rgba(126,240,197,0.16), transparent 24%),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 28px;
  align-items: center;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 22px 0 18px;
}

.hero-points,
.check-list,
.card ul,
.profile-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.cards.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.service-card .tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(110,168,254,0.14);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.price {
  color: var(--text);
  font-weight: 800;
  margin-top: 18px;
}

.note {
  margin-top: 16px;
  font-size: 0.92rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
}

.step span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #07111f;
  font-weight: 800;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
  align-items: start;
}

.contact-section { padding-top: 40px; }

.contact-box {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: center;
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(110,168,254,0.14), rgba(126,240,197,0.10));
  border: 1px solid var(--line);
}

.contact-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.site-footer {
  padding: 22px 0 36px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

@media (max-width: 920px) {
  .hero-grid,
  .profile-grid,
  .contact-box,
  .cards.three,
  .steps {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
    padding: 14px 0;
  }

  .nav nav { gap: 12px; }
  .contact-actions { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .section { padding: 68px 0; }
  .hero { padding: 44px 0 32px; }
  .nav { flex-direction: column; }
  .hero-actions, .contact-actions { flex-direction: column; }
  .btn, .btn-secondary { width: 100%; }
}