:root {
  --color-primary-50: #f0f0f5;
  --color-primary-100: #d9d9e3;
  --color-primary-200: #b3b3c7;
  --color-primary-300: #8c8cab;
  --color-primary-400: #66668f;
  --color-primary-500: #1a1a2e;
  --color-primary-600: #151526;
  --color-primary-700: #10101e;
  --color-primary-800: #0a0a16;
  --color-primary-900: #05050e;
  --color-accent-50: #e8f0ff;
  --color-accent-100: #c5d9ff;
  --color-accent-200: #8fb6ff;
  --color-accent-300: #5a94ff;
  --color-accent-400: #2f78ff;
  --color-accent-500: #0066ff;
  --color-accent-600: #0052d6;
  --color-accent-700: #0040ad;
  --color-accent-800: #00338a;
  --color-accent-900: #002566;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a3a3a3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  --color-success-500: #22c55e;
  --color-warning-500: #f59e0b;
  --color-error-500: #ef4444;
  --color-info-500: #3b82f6;
  --color-beige: #f4f2ef;
  --color-surface: #000000;
  --color-surface-secondary: #000000;
  --color-surface-elevated: #0a0a0a;
  --color-border: rgba(255, 255, 255, 0.16);
  --color-text: #f5f5f5;
  --color-text-secondary: rgba(255, 255, 255, 0.62);
  --color-text-inverse: #ffffff;
  --font-family-sans: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --line-height-normal: 1.5;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --section-pad-y: clamp(3.75rem, 7.5vw, 6rem);
  --section-pad-y-start: clamp(5.25rem, 10.5vw, 8rem);
  --section-pad-y-end: clamp(5.75rem, 11.5vw, 9rem);
  --section-title-size: clamp(1.5rem, 3vw, 2.25rem);
  --type-title-weight: 600;
  --type-title-line-height: 1.35;
  --type-title-tracking: -0.02em;
  --type-title-color: #1a1f36;
  --type-section-title-sm: clamp(1.35rem, 2.5vw, 1.85rem);
  --type-stat-size: clamp(2.25rem, 4.5vw, 3.75rem);
  --type-stat-weight: 600;
  --type-stat-line-height: 0.95;
  --type-stat-tracking: -0.04em;
  --type-emphasis-size: clamp(1.1rem, 2vw, 1.35rem);
  --type-emphasis-weight: 700;
  --type-panel-title-size: clamp(1.35rem, 1.2vw + 1rem, 1.75rem);
  --type-panel-title-size-lg: clamp(1.75rem, 2.5vw + 1rem, 2.5rem);
  --type-eyebrow-size: var(--font-size-xs);
  --type-eyebrow-weight: 700;
  --type-eyebrow-tracking: 0.08em;
  --type-eyebrow-color: #1a1f36;
  --type-body-size: var(--font-size-base);
  --type-body-line-height: 1.65;
  --type-body-color: #1a1f36;
  --type-note-size: var(--font-size-xs);
  --type-note-weight: 500;
  --type-note-line-height: 1.55;
  --type-note-tracking: 0.02em;
  --type-note-color: #1a1f36;
  --type-code-label-size: clamp(0.6875rem, 1.1vw, 0.8125rem);
  --type-code-label-weight: 600;
  --type-code-label-tracking: 0.06em;
  --type-code-label-color: var(--color-accent-500);
  --type-support-size: clamp(0.8125rem, 1.4vw, 0.9375rem);
  --type-support-weight: 500;
  --type-support-line-height: 1.5;
  --type-support-color: #1a1f36;
  --type-subtitle-size: clamp(1.25rem, 2vw, 1.5rem);
  --type-subtitle-weight: 600;
  --type-subtitle-line-height: 1.35;
  --type-subtitle-tracking: -0.02em;
  --type-subtitle-color: #1a1f36;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-reveal: 1000ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-emphatic: cubic-bezier(0.2, 0.9, 0.2, 1);
  --header-height: 64px;

  /*
    12-column grid
    - col: 70px × 12 = 840
    - gutter: 40px × 11 = 440
    - tracks: 1280
    - inline pad: 20px × 2 = 40
    - grid max: 1320
    뷰포트 초과분은 margin-inline: auto 로 양옆 마진
  */
  --grid-cols: 12;
  --grid-col: 70px;
  --grid-gutter: 40px;
  --grid-inline-pad: 20px;
  --grid-max: 1320px;
  --container-max: var(--grid-max);
  --grid-template: repeat(12, var(--grid-col));
  --grid-cell-pad: 0px;
  /* legacy alias — 외곽 마진은 max-width + auto 로 처리 */
  --grid-margin: var(--grid-inline-pad);
}

/* 1320 미만: 고정 70px 대신 유동 12열 */
@media (max-width: 1319px) {
  :root {
    --grid-template: repeat(12, minmax(0, 1fr));
    --grid-gutter: 20px;
    --grid-inline-pad: 16px;
  }
}

@media (max-width: 768px) {
  :root {
    --grid-gutter: 12px;
    --grid-inline-pad: 16px;
  }
}

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

html {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent-500) transparent;
}

body {
  margin: 0;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-surface);
  /* antialiased 제거: Windows FHD ClearType/한글 힌팅에 불리 */
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent-500);
  outline-offset: 2px;
}

/* Scrollbar — brand blue */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent-500) transparent;
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: var(--color-accent-500);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-600);
  border: 2px solid transparent;
  background-clip: padding-box;
}

*::-webkit-scrollbar-corner {
  background: transparent;
}