@import url("https://fonts.googleapis.com/css?family=Roboto&display=swap");
@import url("https://fonts.googleapis.com/css?family=M+PLUS+Rounded+1c:wght@400;700&display=swap");

:root {
  --font-family-base: "Roboto", sans-serif;
  --font-family-heading: "Kosugi Maru", sans-serif;
  --font-size-base: 16px;
  --color-bg: #f5f5f5;
  --color-text: #333;
  --color-heading-bg: #333;
  --color-heading-text: #f5f5f5;
  --color-primary: #007bff;
  --color-border: #ddd;
  --color-surface: #fff;
  --color-rank-first: #ffd700;
  --color-rank-second: #eeeeee;
  --color-rank-third: #cd7f32;
  --color-badge-daily: #2196f3;
  --color-badge-weekly: #4caf50;
  --color-badge-monthly: #ff9800;
  --color-badge-recommend: #f44336;
  --color-nogizaka46: #dbc5f4;
  --color-sakurazaka46: #e9c6d6;
  --color-hinatazaka46: #d9ecf6;
  --space-xxs: 2px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  padding: var(--space-xxs) var(--space-xs);
  margin: 0;
  font-size: var(--font-size-base);
}

header {
  font-family: var(--font-family-heading);
  background-color: var(--color-heading-bg);
  color: var(--color-heading-text);
  padding: var(--space-xxs) var(--space-md);
  text-align: center;
  font-size: 1.2em;
  margin-bottom: var(--space-sm);
}

header a {
  text-decoration: none;
  color: inherit;
}

header a:hover {
  text-decoration: underline;
}

h1 {
  font-size: 1.3em;
  padding: var(--space-xs);
  font-weight: bold;
  text-align: center;
  margin: var(--space-xs) 0;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1em;
  }
}