:root {
    color-scheme: dark;
    --surface-canvas: #0f1110;
    --surface-primary: #151816;
    --surface-secondary: #1b1f1c;
    --text-primary: #f4f7f5;
    --text-secondary: #b5bdb8;
    --text-muted: #89928c;
    --border-default: #303632;
    --border-strong: #465049;
    --accent-primary: #45d294;
    --accent-hover: #70e0ac;
    --status-success-surface: #163326;
    --status-success-text: #7ee6b6;
    --status-warning-surface: #392d16;
    --status-warning-text: #f4c95d;
    --status-error-surface: #3c2020;
    --status-error-text: #ff9a94;
    --focus-ring: #8ce6bb;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --text-display: clamp(2rem, 6vw, 3rem);
    --text-h2: 1.5rem;
    --text-h3: 1.125rem;
    --text-body-lg: 1.125rem;
    --text-body: 1rem;
    --text-body-sm: 0.875rem;
    --text-caption: 0.75rem;
    --font-primary: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --radius-small: 6px;
    --radius-medium: 10px;
    --duration-micro: 120ms;
}

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

html {
    background: var(--surface-canvas);
    font-family: var(--font-primary);
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    min-height: 100dvh;
    margin: 0;
    background: var(--surface-canvas);
    color: var(--text-primary);
    font-size: var(--text-body);
    line-height: 1.6;
}

a {
    color: inherit;
}

code {
    font-family: var(--font-mono);
    font-size: var(--text-body-sm);
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

h1,
h2,
h3,
p,
dl,
dd,
ol {
    margin: 0;
}

h1,
h2,
h3 {
    line-height: 1.3;
    word-break: keep-all;
}

.skip-link {
    position: fixed;
    inset-block-start: var(--space-4);
    inset-inline-start: var(--space-4);
    z-index: 10;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-small);
    background: var(--text-primary);
    color: var(--surface-canvas);
    font-weight: 600;
    text-decoration: none;
    transform: translateY(-200%);
    white-space: nowrap;
}

.skip-link:focus {
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}