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

:root {
  --font-sans: 'Noto Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'Noto Sans Mono', ui-monospace, monospace;

  --color-bg: #F5F5F0;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #5C5C5C;
  --color-text-tertiary: #8A8A8A;
  --color-border: #E5E5E0;
  --color-divider: #DDDDD8;
  --color-footer-bg: #1A1A1A;
  --color-footer-text: #CCCCCC;
  --color-footer-muted: #888888;
  --color-stub-banner-bg: #FFF8E1;
  --color-stub-banner-text: #6D5D00;
  --color-stub-banner-border: #F0E6B8;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --max-width: 960px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  text-align: center;
  padding: 100px 24px 80px;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 300;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 32px;
}

.hero-description {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.hero-status {
  display: inline-block;
  margin-top: 28px;
  padding: 6px 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border);
  border-radius: 100px;
}

.divider {
  border: none;
  height: 1px;
  background-color: var(--color-divider);
  max-width: var(--max-width);
  margin: 0 auto;
}

.value-section {
  padding: 72px 24px;
}

.section-title {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: 48px;
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 36px;
  height: 36px;
  color: var(--color-text-tertiary);
  margin-bottom: 18px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.card-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 56px 24px 40px;
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-transparency {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-footer-muted);
  max-width: 680px;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid #333;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-footer-text);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-footer-muted);
}

.stub-banner {
  background-color: var(--color-stub-banner-bg);
  border: 1px solid var(--color-stub-banner-border);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  margin-bottom: 40px;
  font-size: 0.875rem;
  color: var(--color-stub-banner-text);
  line-height: 1.6;
}

.legal-page {
  padding: 64px 24px 80px;
}

.legal-page h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.legal-page .legal-subtitle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  margin-bottom: 32px;
}

.legal-page h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--color-text);
}

.legal-page p,
.legal-page ul {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.legal-page ul {
  padding-left: 24px;
}

.legal-page li {
  margin-bottom: 6px;
}

.legal-back {
  display: inline-block;
  margin-top: 40px;
  font-size: 0.9rem;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 639px) {
  .hero {
    padding: 72px 20px 56px;
  }

  .value-section {
    padding: 48px 20px;
  }

  .card {
    padding: 24px 22px;
  }
}