:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-light: #e0f2fe;
  --text: #1e293b;
  --text-muted: #475569;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #cbd5e1;
  --focus-ring: #0284c7;
  --surface-card: #ffffff;
  --container-max: 1120px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-stack);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #0f172a;
  color: #ffffff;
  padding: 8px 16px;
  z-index: 1000;
  text-decoration: none;
  font-weight: bold;
}
.skip-link:focus {
  top: 0;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--primary-dark);
}
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

header {
  border-bottom: 1px solid var(--border);
  background-color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.brand img {
  width: 32px;
  height: 32px;
  display: block;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--primary-dark);
  background-color: var(--primary-light);
}

.btn {
  display: inline-block;
  background-color: var(--primary);
  color: #ffffff !important;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  text-align: center;
  font-size: 1.05rem;
}
.btn:hover {
  background-color: var(--primary-dark);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
}

.hero {
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.25rem;
}
.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.hero h1 {
  font-size: 2.1rem;
  line-height: 1.35;
  color: #0f172a;
  margin-bottom: 1.25rem;
}
.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin: 2rem 0;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}
.card h2, .card h3 {
  font-size: 1.3rem;
  color: #0f172a;
  margin-bottom: 0.75rem;
}

.process-step {
  border-left: 4px solid var(--primary);
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}
.process-step h3 {
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 1rem;
  background-color: #ffffff;
}
.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary);
}
.faq-item[open] summary::after {
  content: "−";
}
.faq-content {
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--text-muted);
}

.operator-box {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2.5rem 0;
}
.operator-box h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}
.operator-box dl {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 0.5rem 1rem;
}
.operator-box dt {
  font-weight: 600;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
}
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.checkbox-group input {
  margin-top: 0.35rem;
  width: 18px;
  height: 18px;
}

.status-message {
  padding: 1rem;
  border-radius: 6px;
  margin-top: 1.25rem;
  display: none;
}
.status-message.error {
  display: block;
  background-color: #fee2e2;
  border: 1px solid #ef4444;
  color: #991b1b;
}

footer {
  background-color: #0f172a;
  color: #cbd5e1;
  padding: 3rem 1.25rem 2rem;
  margin-top: 4rem;
}
.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #334155;
}
.footer-container h4 {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}
.footer-nav {
  list-style: none;
}
.footer-nav li {
  margin-bottom: 0.5rem;
}
.footer-nav a {
  color: #94a3b8;
  text-decoration: none;
}
.footer-nav a:hover {
  color: #ffffff;
}
.footer-bottom {
  max-width: var(--container-max);
  margin: 1.5rem auto 0;
  text-align: center;
  font-size: 0.9rem;
  color: #64748b;
}

#consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #0f172a;
  color: #ffffff;
  padding: 1.25rem;
  box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
  z-index: 9999;
  display: none;
}
.consent-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.consent-text {
  flex: 1 1 500px;
  font-size: 0.95rem;
  line-height: 1.5;
}
.consent-actions {
  display: flex;
  gap: 0.75rem;
}
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-accept {
  background-color: var(--primary);
  color: #ffffff;
}
.btn-decline {
  background-color: transparent;
  color: #cbd5e1;
  border-color: #475569;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  }
  .nav-menu.open {
    display: flex;
  }
  .footer-container {
    grid-template-columns: 1fr;
  }
  .operator-box dl {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}