@charset "UTF-8";

:root {
  --color-bg: #0a0a0f;
  --color-card: #1a1a2e;
  --color-text: #e4e4e7;
  --color-text-muted: #a1a1aa;
  --color-primary: #a68a56;
  --color-border: #27273a;
  --color-link: #a68a56;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-size: 16px;
}

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
header {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

/* Main */
main {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-xl) 0;
}

section {
  margin-bottom: var(--spacing-xl);
}

/* Headings */
h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  letter-spacing: 0.05em;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-lg);
  color: var(--color-text);
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

/* Text */
p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
}

/* Links */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-muted);
}

/* Card */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

/* Button */
.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #0a0a0f;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.lang-switcher button {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.lang-switcher button.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #0a0a0f;
}

.lang-content {
  display: none;
}

.lang-content.active {
  display: block;
}

/* Contact Info */
.contact-info dt {
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--spacing-md);
}

.contact-info dd {
  color: var(--color-text-muted);
  margin-left: 0;
  margin-bottom: var(--spacing-sm);
}

/* Disclaimer Box */
.disclaimer {
  background: rgba(166, 138, 86, 0.1);
  border: 1px solid var(--color-primary);
  border-radius: 8px;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.disclaimer p {
  color: var(--color-text);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 600px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .header-inner {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}