/* ============================================
   투데잇 아카이브 위키 — Design Tokens
   ============================================ */

:root {
  /* Brand core - mint */
  --brand-mint-50:   #EAFBF6;
  --brand-mint-100:  #CFF5E8;
  --brand-mint-200:  #A6EBD6;
  --brand-mint-300:  #6FDDBF;
  --brand-mint-400:  #3BCEB0;
  --brand-mint-500:  #2EB89B;
  --brand-mint-600:  #229B82;
  --brand-mint-700:  #197D69;
  --brand-mint-800:  #0F5D4E;

  /* Emotion accents */
  --accent-coral-100: #FFE3DF;
  --accent-coral-300: #FFA69C;
  --accent-coral-500: #FF7369;
  --accent-coral-700: #D9453A;

  --accent-amber-100: #FFF3D1;
  --accent-amber-300: #FFD766;
  --accent-amber-500: #F5A623;
  --accent-amber-700: #B87800;

  /* Neutrals (warm paper tones) */
  --neutral-0:   #FFFFFF;
  --neutral-50:  #FAFAF7;
  --neutral-100: #F2F1EC;
  --neutral-200: #E5E3DC;
  --neutral-300: #CFCCC1;
  --neutral-400: #A8A499;
  --neutral-500: #7C786D;
  --neutral-600: #57544C;
  --neutral-700: #3B3934;
  --neutral-800: #252320;
  --neutral-900: #1B2B4B;
  --neutral-950: #0E1524;

  /* Heatmap */
  --heat-0: #F2F1EC;
  --heat-1: #CFF5E8;
  --heat-2: #6FDDBF;
  --heat-3: #3BCEB0;
  --heat-4: #2EB89B;
  --heat-5: #0F5D4E;

  /* Fonts */
  --font-display: "Pretendard Variable", "SF Pro Display", "Helvetica Neue", system-ui, sans-serif;
  --font-body:    "Pretendard Variable", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", "Menlo", monospace;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;

  /* Motion */
  --dur-fast: 160ms;
  --dur-base: 240ms;
  --dur-slow: 600ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-emphasis: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light theme (default) */
:root,
[data-theme="light"] {
  --bg-page:        #FAFAF7;
  --bg-surface:     #FFFFFF;
  --bg-surface-alt: #F2F1EC;
  --bg-overlay:     rgba(27, 43, 75, 0.45);
  --fg-default:     #1B2B4B;
  --fg-muted:       #57544C;
  --fg-subtle:      #7C786D;
  --fg-invert:      #FFFFFF;
  --border-default: #E5E3DC;
  --border-strong:  #CFCCC1;
  --accent:         #2EB89B;
  --accent-hover:   #229B82;
  --link:           #229B82;
  --chart-grid:     #E5E3DC;
  --chart-axis:     #A8A499;
  --shadow-xs: 0 1px 2px 0 rgba(27, 43, 75, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(27, 43, 75, 0.06), 0 1px 2px 0 rgba(27, 43, 75, 0.04);
  --shadow-md: 0 4px 8px -2px rgba(27, 43, 75, 0.08), 0 2px 4px -2px rgba(27, 43, 75, 0.06);
  --shadow-lg: 0 10px 20px -4px rgba(27, 43, 75, 0.10), 0 4px 8px -4px rgba(27, 43, 75, 0.06);
  --shadow-xl: 0 20px 40px -8px rgba(27, 43, 75, 0.14), 0 8px 16px -8px rgba(27, 43, 75, 0.08);
  --shadow-modal: 0 24px 48px -12px rgba(27, 43, 75, 0.25);
}

[data-theme="dark"] {
  --bg-page:        #0E1524;
  --bg-surface:     #172032;
  --bg-surface-alt: #1F2A40;
  --bg-overlay:     rgba(0, 0, 0, 0.65);
  --fg-default:     #E8E8E3;
  --fg-muted:       #9A9E9A;
  --fg-subtle:      #71766F;
  --fg-invert:      #0E1524;
  --border-default: #283247;
  --border-strong:  #3A4560;
  --accent:         #4FDEC0;
  --accent-hover:   #6FDDBF;
  --link:           #6FDDBF;
  --chart-grid:     #283247;
  --chart-axis:     #5A6478;
  --heat-0: #1F2A40;
  --heat-1: #1A3A3A;
  --heat-2: #1E5349;
  --heat-3: #276E5E;
  --heat-4: #2EB89B;
  --heat-5: #4FDEC0;
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 20px -4px rgba(0, 0, 0, 0.6), 0 4px 8px -4px rgba(0, 0, 0, 0.3);
  --shadow-modal: 0 24px 48px -12px rgba(0, 0, 0, 0.7);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--fg-default);
  font-feature-settings: "ss03", "cv01";
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}

body { word-break: keep-all; overflow-wrap: break-word; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.micro {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  font-weight: 600;
  text-transform: uppercase;
}

.caption { font-size: 0.875rem; letter-spacing: 0.01em; }
.muted { color: var(--fg-muted); }

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg-page) 85%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-default);
  transition: background-color var(--dur-base) var(--ease-out);
}

.header-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 32px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--fg-default);
  cursor: pointer;
  user-select: none;
}
.brand-mark {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--brand-mint-400);
  display: grid; place-items: center;
  color: white;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0;
}
.brand-sub {
  font-weight: 500;
  color: var(--fg-muted);
  font-size: 13px;
  margin-left: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-item {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  font-family: inherit;
}
.nav-item:hover { color: var(--fg-default); background: var(--bg-surface-alt); }
.nav-item.active { color: var(--fg-default); background: var(--bg-surface-alt); }
.nav-item.active::after {
  content: "";
  display: block;
  width: 16px; height: 2px;
  background: var(--accent);
  margin: 4px auto -2px;
  border-radius: 2px;
}

.icon-btn {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--fg-default);
  cursor: pointer;
  display: grid; place-items: center;
  transition: all var(--dur-fast) var(--ease-out);
  font-size: 16px;
}
.icon-btn:hover { border-color: var(--border-strong); background: var(--bg-surface-alt); }

@media (max-width: 768px) {
  .header-inner { height: 56px; padding: 0 20px; }
  .nav { display: none; }
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  margin-top: 120px;
  border-top: 1px solid var(--border-default);
  background: var(--bg-surface);
}
.footer-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 48px 32px 64px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: var(--fg-muted);
  font-size: 14px;
}
.footer-inner strong { color: var(--fg-default); font-weight: 600; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--fg-muted); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color var(--dur-fast); }
.footer-links a:hover { border-color: var(--fg-muted); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--dur-fast) var(--ease-out);
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.98); }
.btn-ghost { background: transparent; color: var(--fg-default); border-color: var(--border-default); }
.btn-ghost:hover { background: var(--bg-surface-alt); border-color: var(--border-strong); }

/* ============================================
   KPI CARD
   ============================================ */
.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 28px 24px;
  transition: all var(--dur-base) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 160px;
}
.kpi-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.kpi-value {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1.05;
}
.kpi-value-sm { font-size: 32px; }
.kpi-label {
  font-size: 13px;
  color: var(--fg-muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.kpi-annotation {
  margin-top: auto;
  padding-top: 10px;
  font-size: 12px;
  color: var(--accent-amber-700);
  display: flex; align-items: center; gap: 6px;
}
[data-theme="dark"] .kpi-annotation { color: var(--accent-amber-300); }

/* ============================================
   ENTRY CARD
   ============================================ */
.entry-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 28px;
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 220px;
  text-align: left;
  font-family: inherit;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.entry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.entry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-mint-50) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
}
[data-theme="dark"] .entry-card::before {
  background: linear-gradient(135deg, rgba(79,222,192,0.06) 0%, transparent 50%);
}
.entry-card:hover::before { opacity: 1; }

.entry-card-icon { font-size: 28px; line-height: 1; }
.entry-card-title { font-size: 20px; font-weight: 700; color: var(--fg-default); position: relative; }
.entry-card-desc { font-size: 14px; color: var(--fg-muted); flex: 1; position: relative; }
.entry-card-cta {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--dur-fast) var(--ease-out);
  position: relative;
}
.entry-card:hover .entry-card-cta { gap: 10px; }

/* ============================================
   NARRATIVE BLOCK
   ============================================ */
.narrative {
  max-width: 68ch;
  margin: 0 auto;
  font-size: 18px;
  line-height: 1.78;
  color: var(--fg-default);
}
.narrative p { margin: 0 0 1.4em; }
.narrative .figure { font-family: var(--font-mono); color: var(--accent-hover); font-weight: 600; font-size: 0.95em; }
.narrative em { font-style: normal; background-image: linear-gradient(transparent 70%, var(--brand-mint-100) 70%); padding: 0 2px; }
[data-theme="dark"] .narrative em { background-image: linear-gradient(transparent 70%, rgba(79,222,192,0.25) 70%); }

/* ============================================
   SECTION LAYOUT
   ============================================ */
.page {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 32px;
}
.page-narrow {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
}
.section { margin-top: 96px; }
.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.section-sub { color: var(--fg-muted); font-size: 15px; margin: 0 0 28px; }

@media (max-width: 768px) {
  .page, .page-narrow { padding: 0 20px; }
  .section { margin-top: 64px; }
}

/* ============================================
   BADGE
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.badge-lang { background: var(--accent-amber-500); color: white; }
.badge-count { background: var(--brand-mint-100); color: var(--brand-mint-700); }
[data-theme="dark"] .badge-count { background: rgba(79,222,192,0.15); color: var(--brand-mint-300); }

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 40px 20px;
  animation: fadeIn 200ms var(--ease-out);
}
.modal-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-modal);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 40px;
  animation: modalIn 360ms var(--ease-emphasis);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: translateY(24px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

@media (max-width: 640px) {
  .modal-content { padding: 28px 22px; }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@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;
  }
}

/* ============================================
   SELECTION + FOCUS
   ============================================ */
::selection { background: var(--brand-mint-200); color: var(--neutral-900); }
[data-theme="dark"] ::selection { background: rgba(79,222,192,0.35); color: var(--fg-default); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}