/* ==========================================================================
   DESIGN SYSTEM TOKENS & FOUNDATIONS
   Reference: Jitter Design System Spec
   ========================================================================== */

:root {
  /* ------------------------------------------------------------------------
     1. COLOR PALETTE
     ------------------------------------------------------------------------ */
  /* Neutral */
  --color-white: #FFFFFF;
  --color-gray-50: #FAF9FA;
  --color-gray-100: #F2F2F4;
  --color-gray-200: #DCDBDE;
  --color-gray-400: #B5B0C1;
  --color-gray-600: #6B6B72;
  --color-ink: #161418;
  --color-black: #000000;

  /* Brand / Accent */
  --color-purple-500: #A280E4;
  --color-purple-600: #7B4FD8;
  --color-purple-300: #CEB8E1;
  --color-purple-100: #F2F1FA;
  --color-purple-900: #5F4166;
  --color-blue-500: #4FABD9;
  --color-blue-100: #EAF4FD;
  --color-yellow-400: #F7FF8A;
  --color-pink-400: #FF6BD6;
  --color-green-100: #E7F4E6;
  --color-green-500: #22C55E;

  /* Semantic Mappings */
  --bg-page: var(--color-white);
  --bg-surface: var(--color-gray-100);
  --bg-surface-subtle: var(--color-gray-50);
  --bg-inverse: var(--color-black);
  --text-primary: var(--color-ink);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-400);
  --text-inverse: #FFFFFF;
  --border-default: var(--color-gray-200);
  --action-primary: var(--color-ink);
  --action-accent: var(--color-purple-500);
  --action-highlight: var(--color-yellow-400);

  /* Legacy Semantic Aliases for compatibility */
  --accent-primary: var(--color-purple-500);
  --accent-indigo: var(--color-purple-600);

  /* Gradients */
  --gradient-purple: linear-gradient(180deg, #A280E4 0%, #7B4FD8 100%);
  --gradient-sky: linear-gradient(180deg, #E6F3FF 0%, #BFE0F8 100%);
  --gradient-lemon: linear-gradient(180deg, #F7FF8A 0%, #EAFF3C 100%);
  --grad-workflows: var(--gradient-purple);
  --grad-text-workflows: linear-gradient(135deg, #161418 0%, #7B4FD8 50%, #A280E4 100%);
  --grad-dark-card: linear-gradient(180deg, #1A1A1E 0%, #0D0D10 100%);

  /* ------------------------------------------------------------------------
     2. TYPOGRAPHY
     Rule: Korean default "Malgun Gothic" (맑은 고딕), no MS Mincho.
     ------------------------------------------------------------------------ */
  --font-sans: "Malgun Gothic", "맑은 고딕", "Pretendard", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-base: var(--font-sans);
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Type Scale */
  --display-xl: clamp(40px, 5.2vw, 72px);
  --display-lg: clamp(32px, 4.0vw, 56px);
  --heading-h1: clamp(28px, 3.4vw, 44px);
  --heading-h2: clamp(24px, 2.8vw, 36px);
  --heading-h3: clamp(20px, 2.2vw, 28px);
  --body-lg: 20px;
  --body: 16px;
  --body-md: 16px;
  --body-sm: 14px;
  --caption: 12px;
  --micro: 10px;

  /* ------------------------------------------------------------------------
     3. SPACING & LAYOUT (4px base)
     ------------------------------------------------------------------------ */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --space-32: 128px;

  --container: 1100px;
  --container-max: var(--container);
  --header-height: 64px;

  /* ------------------------------------------------------------------------
     4. RADIUS & ELEVATION
     ------------------------------------------------------------------------ */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --radius-pill: 999px;

  /* Shadows: Mockup only large shadow, cards differentiated by background */
  --shadow-mockup: 0 24px 60px rgba(22, 20, 24, 0.12);
  --shadow-card: 0 2px 8px rgba(22, 20, 24, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(22, 20, 24, 0.08);

  /* Glassmorphism subtle */
  --glass-bg: rgba(255, 255, 255, 0.88);
  --glass-border: rgba(220, 219, 222, 0.7);

  /* ------------------------------------------------------------------------
     5. MOTION & EASING
     ------------------------------------------------------------------------ */
  --ease-jitter: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-micro: 150ms;
  --duration-card: 300ms;
  --duration-reveal: 600ms;

  --transition-fast: var(--duration-micro) var(--ease-jitter);
  --transition-normal: var(--duration-card) var(--ease-jitter);
}

/* ==========================================================================
   BASE RESET & TYPOGRAPHY RULES
   ========================================================================== */

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

html {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--body);
  line-height: 1.5;
  color: var(--color-ink);
  background-color: var(--color-white);
  word-break: keep-all;
  overflow-x: hidden;
}

/* Headings: Tight letter spacing (-3% ~ -4%) & text-wrap balance */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-wrap: balance;
  line-height: 1.15;
}

h1 { font-size: var(--heading-h1); }
h2 { font-size: var(--heading-h2); }
h3 { font-size: var(--heading-h3); font-weight: 600; }

p {
  color: var(--color-gray-600);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   GLOBAL COMPONENT PRIMITIVES
   ========================================================================== */

/* Button System (All Pill Radius) */
.btn {
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-pill);
  font: 500 14px/1 var(--font-sans);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 13px;
}

.btn-lg {
  height: 52px;
  padding: 0 32px;
  font-size: 15px;
  font-weight: 600;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-ink);
  color: #FFFFFF;
}
.btn-primary:hover {
  background-color: #2D2A30;
}

.btn-accent {
  background-color: var(--color-purple-500);
  color: #FFFFFF;
  font-weight: 600;
}
.btn-accent:hover {
  background-color: var(--color-purple-600);
}

.btn-highlight, .btn-lemon {
  background-color: var(--color-yellow-400);
  color: var(--color-ink);
  font-weight: 600;
}
.btn-highlight:hover, .btn-lemon:hover {
  background-color: #EBF763;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-ink);
}
.btn-ghost:hover {
  background-color: var(--color-gray-100);
}

.btn-secondary {
  background-color: var(--color-blue-500);
  color: #FFFFFF;
}
.btn-secondary:hover {
  background-color: #3895C0;
}

/* Badges & Pills */
.badge-announcement {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-gray-100);
  color: var(--color-ink);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
}

.badge-announcement a, .badge-announcement .badge-link {
  color: var(--color-purple-600);
  font-weight: 600;
  text-decoration: underline;
}

.badge-section {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-tag {
  background-color: var(--color-ink);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
}

/* Playful Highlight */
.sticker-highlight {
  display: inline-block;
  background-color: var(--color-yellow-400);
  color: var(--color-ink);
  padding: 2px 10px;
  border-radius: 6px;
  font-weight: 700;
  transform: rotate(-1.5deg);
}

/* Motion Utilities */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}