:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-line: #e5e7eb;
  --color-primary: #2563eb;
  --color-primary-contrast: #ffffff;
  --color-danger: #dc2626;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --radius: 10px;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 1px 8px rgb(0 0 0 / 4%);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --page-max: 1100px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: 1.5rem;
}

h2 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 var(--space-3);
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-8);
}

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

.small {
  font-size: 0.875rem;
}

.mono {
  font-variant-numeric: tabular-nums;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}