:root {
  --color-primary: #0D9488;
  --color-primary-dark: #0F766E;
  --color-primary-light: #CCFBF1;
  --color-text: #1A1A1A;
  --color-muted: #6B7280;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F9FAFB;
  --color-border: #E5E7EB;
  --max-width: 720px;
  --padding-mobile: 24px;
  --padding-desktop: 40px;
}

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

body {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3 {
  line-height: 1.4;
  font-weight: 700;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

small {
  font-size: 14px;
}

/* Layout */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--padding-mobile);
  padding-right: var(--padding-mobile);
}

/* Header */

.header {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Hero */

.hero {
  margin: 80px 0;
}

.hero-title {
  font-size: 24px;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--color-muted);
}

/* Sections */

.section {
  margin-bottom: 80px;
}

.section-heading {
  font-size: 20px;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 3px solid var(--color-primary);
}

.section p {
  margin-bottom: 16px;
}

.section p:last-child {
  margin-bottom: 0;
}

/* Products */

.product {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.product:first-of-type {
  border-top: 1px solid var(--color-border);
}

.product-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.product-description {
  font-size: 14px;
  color: var(--color-muted);
}

/* Company Info (dl) */

.company-info dt {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-muted);
  padding-top: 12px;
}

.company-info dd {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* Privacy Policy */

.privacy-content h2 {
  font-size: 18px;
  margin-top: 40px;
  margin-bottom: 16px;
}

.privacy-content p {
  margin-bottom: 16px;
}

.privacy-date {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 40px;
}

/* Footer */

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 14px;
  color: var(--color-muted);
}

.footer p {
  margin-bottom: 8px;
}

.footer p:last-child {
  margin-bottom: 0;
}

/* Utilities */

.text-muted {
  color: var(--color-muted);
}

/* Desktop */

@media (min-width: 768px) {
  .container {
    padding-left: var(--padding-desktop);
    padding-right: var(--padding-desktop);
  }

  .hero-title {
    font-size: 28px;
  }

  .company-info {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: baseline;
  }

  .company-info dt {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .company-info dd {
    padding: 12px 0;
  }
}