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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP",
    "Yu Gothic", sans-serif;
  color: #1a1a2e;
  background-color: #fafbff;
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Header ===== */
.site-header {
  background: linear-gradient(135deg, #6c63ff, #8b5cf6);
  color: #fff;
  padding: 2rem 1.5rem;
  text-align: center;
}

.site-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-header .subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  margin-top: 0.25rem;
}

/* ===== Main Content ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
}

/* ===== Index Page Cards ===== */
.link-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(108, 99, 255, 0.08);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(108, 99, 255, 0.15);
}

.link-card .icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.link-card .label {
  font-size: 1rem;
  font-weight: 600;
  color: #1a1a2e;
}

.link-card .desc {
  font-size: 0.8rem;
  color: #6b7280;
  margin-top: 0.15rem;
}

/* ===== Legal Document Styles ===== */
.legal-doc h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1a1a2e;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #e8e6ff;
}

.legal-doc h2:first-of-type {
  margin-top: 1.5rem;
}

.legal-doc h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #374151;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.legal-doc p {
  margin-bottom: 0.75rem;
  color: #374151;
  font-size: 0.925rem;
}

.legal-doc ul,
.legal-doc ol {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
}

.legal-doc li {
  margin-bottom: 0.35rem;
  color: #374151;
  font-size: 0.925rem;
}

.legal-doc .effective-date {
  display: inline-block;
  background: #f0eeff;
  color: #6c63ff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  margin-bottom: 1rem;
}

.legal-doc .contact-box {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: #f8f7ff;
  border-left: 3px solid #6c63ff;
  border-radius: 0 8px 8px 0;
}

.legal-doc .contact-box p {
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: #9ca3af;
  border-top: 1px solid #e5e7eb;
}

.site-footer a {
  color: #6c63ff;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ===== Back Link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: #6c63ff;
  text-decoration: none;
  margin-bottom: 1rem;
}

.back-link:hover {
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .site-header {
    padding: 1.5rem 1rem;
  }

  .site-header h1 {
    font-size: 1.35rem;
  }

  .container {
    padding: 1.5rem 1rem 3rem;
  }

  .legal-doc h2 {
    font-size: 1.1rem;
  }
}