/* ============================================================
   AI Amina — Design System
   Primary: #D4327A  Surface: #FFF0F5  Dark: #1A1A2E
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --pink:        #D4327A;
  --pink-dark:   #A8235C;
  --pink-light:  #F7A8C8;
  --pink-bg:     #FFF0F5;
  --pink-card:   #FDE8F1;
  --dark:        #1A1A2E;
  --mid:         #4A4A6A;
  --muted:       #8A8AA8;
  --line-green:  #06C755;
  --white:       #FFFFFF;
  --border:      #F0D0E0;
  --radius:      12px;
  --radius-lg:   20px;
  --shadow:      0 4px 24px rgba(212,50,122,0.10);
  --shadow-card: 0 2px 12px rgba(212,50,122,0.08);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  background: var(--dark);
  color: var(--dark);
  line-height: 1.7;
  font-size: 15px;
}

.page-body { background: var(--white); display: flow-root; }

a { color: var(--pink); text-decoration: none; }
a:hover { color: var(--pink-dark); }

img { max-width: 100%; display: block; }

/* ---------- Header ---------- */
#header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(212,50,122,0.06);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link { display: flex; align-items: center; }
.site-logo { height: 44px; width: auto; }

/* PC nav */
.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--mid);
  transition: color .2s;
  white-space: nowrap;
}

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

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
  transform-origin: center;
}

.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.mobile-menu {
  display: none;
  overflow: hidden;
  max-height: 0;
  transition: max-height .3s ease;
  background: var(--white);
  border-top: 1px solid var(--border);
}

.mobile-menu.is-open {
  max-height: 300px;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 8px 0 16px;
}

.mobile-nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--mid);
  padding: 12px 24px;
  border-bottom: 1px solid var(--pink-bg);
  transition: background .15s, color .15s;
}

.mobile-nav-link:hover {
  background: var(--pink-bg);
  color: var(--pink);
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #FDE8F1 0%, #FFF0F5 50%, #FCF0FF 100%);
  padding: 72px 24px 64px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  background: var(--white);
  color: var(--pink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 5px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--pink-light);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -.01em;
}

.hero h1 .accent { color: var(--pink); }

.hero-sub {
  font-size: 16px;
  color: var(--mid);
  max-width: 520px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--line-green);
  color: var(--white);
  font-size: 16px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 999px;
  box-shadow: 0 4px 18px rgba(6,199,85,0.30);
  transition: transform .2s, box-shadow .2s;
}
.btn-line:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(6,199,85,0.38); color: var(--white); }

.btn-line svg { flex-shrink: 0; }

.hero-note { font-size: 12px; color: var(--muted); }

/* ---------- Section ---------- */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 64px 24px;
}

.section-label {
  display: inline-block;
  color: var(--pink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(22px, 3.5vw, 30px);
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-desc {
  color: var(--mid);
  font-size: 15px;
  max-width: 560px;
  margin-bottom: 40px;
}

/* ---------- Features ---------- */
.features-bg { background: var(--pink-bg); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--pink-card);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--mid);
  line-height: 1.6;
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  align-items: start;
}

.plan-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform .2s, box-shadow .2s;
}

.plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.plan-card.featured {
  border-color: var(--pink);
  background: linear-gradient(160deg, #FDE8F1 0%, #FFF8FC 100%);
}

.plan-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pink);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.plan-price {
  font-size: 40px;
  font-weight: 800;
  color: var(--dark);
  line-height: 1;
  margin-bottom: 4px;
}

.plan-price span { font-size: 16px; font-weight: 500; color: var(--mid); }
.plan-unit { font-size: 13px; color: var(--muted); margin-bottom: 20px; }

.plan-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

.plan-features {
  list-style: none;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plan-features li {
  font-size: 14px;
  color: var(--mid);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.plan-features li::before {
  content: '✓';
  color: var(--pink);
  font-weight: 700;
  flex-shrink: 0;
}

.plan-note {
  margin-top: 32px;
  padding: 16px 20px;
  background: var(--pink-bg);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--mid);
  border-left: 3px solid var(--pink-light);
  text-align: left;
}

/* ---------- How to use ---------- */
.howto-bg { background: var(--pink-bg); }

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 640px;
}

.step {
  display: flex;
  gap: 24px;
  padding-bottom: 36px;
  position: relative;
}

.step:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 44px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.step-num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--pink);
  color: var(--white);
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
  padding-top: 8px;
}

.step-body p {
  font-size: 14px;
  color: var(--mid);
}

/* ---------- Keywords ---------- */
.keywords-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.keyword-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow-card);
}

.keyword-tag {
  display: inline-block;
  background: var(--pink);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 10px;
  font-family: monospace;
}

.keyword-card p {
  font-size: 13px;
  color: var(--mid);
  line-height: 1.6;
}

/* ---------- Contact ---------- */
.contact-box {
  background: var(--pink-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  max-width: 560px;
  margin: 0 auto;
}

.contact-box h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.contact-box p {
  font-size: 14px;
  color: var(--mid);
  margin-bottom: 16px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--pink);
}

.refund-note {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--pink-dark) 0%, var(--pink) 60%, #E84393 100%);
  padding: 64px 24px;
  text-align: center;
  color: var(--white);
}

.cta-banner h2 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}

.cta-banner p {
  font-size: 15px;
  opacity: .85;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.55);
  padding: 36px 24px;
  text-align: center;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
}

.footer-brand {
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.footer-copy { font-size: 12px; margin-bottom: 16px; }

.footer-inline-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  font-size: 12px;
}

.footer-inline-links a { color: rgba(255,255,255,0.55); }
.footer-inline-links a:hover { color: var(--pink-light); }

/* ---------- Sub-page (法的ページ) ---------- */
.legal-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.legal-wrap h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.legal-wrap h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--pink-dark);
  margin: 28px 0 8px;
}

.legal-wrap p {
  font-size: 14px;
  color: var(--mid);
  margin-bottom: 12px;
  text-align: left;
}

.legal-wrap ul {
  list-style: disc;
  padding-left: 1.4em;
  margin-bottom: 12px;
}

.legal-wrap ul li {
  font-size: 14px;
  color: var(--mid);
  margin-bottom: 6px;
  text-align: left;
}

/* ---------- Law table ---------- */
.law-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  font-size: 14px;
}

.law-table th,
.law-table td {
  padding: 14px 16px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}

.law-table th {
  background: var(--pink-bg);
  color: var(--dark);
  font-weight: 700;
  width: 30%;
  white-space: nowrap;
}

.law-table td { color: var(--mid); }

/* ---------- Notice Banner ---------- */
.notice-banner {
  background: #FFF8E6;
  border-bottom: 2px solid #F5A623;
  padding: 12px 20px;
  text-align: center;
  font-size: 13px;
  color: #7A4F00;
  line-height: 1.6;
}

.notice-banner strong { font-weight: 700; }

/* Feature card: unavailable badge */
.feature-unavailable-badge {
  display: inline-block;
  background: #FFF3CD;
  color: #856404;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid #FFCC00;
  margin-top: 10px;
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }

/* ---------- Responsive ---------- */
@media (max-width: 700px) {
  /* Header */
  .header-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }
  .header-inner { padding: 0 16px; }

  /* Hero */
  .hero { padding: 48px 20px 44px; }
  .hero h1 { font-size: 26px; }
  .hero-sub { font-size: 14px; }
  .btn-line { font-size: 15px; padding: 12px 26px; }

  /* Sections */
  .section { padding: 48px 20px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .keywords-grid { grid-template-columns: 1fr; }

  .contact-box { padding: 28px 20px; }
  .step-num { width: 36px; height: 36px; font-size: 14px; }

  /* Legal */
  .law-table th { width: auto; white-space: normal; }
  .law-table th, .law-table td { padding: 10px 12px; }
  .footer-inline-links { gap: 6px 12px; }
  .legal-wrap { padding-top: 28px; }
}