/* ============================================================
   VIN Decoder — Scoped styles for blog embed
   All rules scoped under .vin-decoder to avoid global conflicts
   ============================================================ */

/* --- Custom Properties --- */
.vin-decoder {
  /* WMI - Blue */
  --wmi-bg: #DBEAFE;
  --wmi-bg-hover: #93C5FD;
  --wmi-border: #3B82F6;
  --wmi-text: #1E40AF;

  /* VDS - Amber */
  --vds-bg: #FEF3C7;
  --vds-bg-hover: #FCD34D;
  --vds-border: #F59E0B;
  --vds-text: #92400E;

  /* Check Digit - Rose */
  --check-bg: #FEE2E2;
  --check-bg-hover: #FCA5A5;
  --check-border: #EF4444;
  --check-text: #991B1B;

  /* VIS - Green */
  --vis-bg: #D1FAE5;
  --vis-bg-hover: #6EE7B7;
  --vis-border: #10B981;
  --vis-text: #065F46;

  /* Typography */
  --font-body: 'Georgia', 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Liberation Mono', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --max-width: 780px;
  --content-padding: 1.5rem;

  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.75;
  color: #1F2937;
}

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

/* ============================================================
   Typography within .vin-decoder
   ============================================================ */
.vin-decoder h2 {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.vin-decoder h3 {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  font-weight: 600;
  color: #1F2937;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.vin-decoder p {
  margin-bottom: 1rem;
}

.vin-decoder ul,
.vin-decoder ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.vin-decoder li {
  margin-bottom: 0.35rem;
}

.vin-decoder code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #F3F4F6;
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.vin-decoder a {
  color: var(--wmi-border);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.vin-decoder a:hover {
  color: var(--wmi-text);
}

/* ============================================================
   Interactive VIN Widget
   ============================================================ */
.vin-decoder .vin-interactive {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 2rem 1.5rem;
  margin: 2.5rem 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.vin-decoder .vin-interactive h2 {
  margin-top: 0;
  text-align: center;
}

/* --- Legend --- */
.vin-decoder .vin-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #4B5563;
}

.vin-decoder .legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.vin-decoder .legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 2px solid;
}

.vin-decoder .legend-wmi   { background: var(--wmi-bg);   border-color: var(--wmi-border); }
.vin-decoder .legend-vds   { background: var(--vds-bg);   border-color: var(--vds-border); }
.vin-decoder .legend-check { background: var(--check-bg); border-color: var(--check-border); }
.vin-decoder .legend-vis   { background: var(--vis-bg);   border-color: var(--vis-border); }

/* --- VIN Character Display --- */
.vin-decoder .vin-display {
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 1rem 0 0.25rem;
}

.vin-decoder .vin-char {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 56px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
}

/* Group base colors */
.vin-decoder .vin-group-wmi   { background: var(--wmi-bg);   color: var(--wmi-text); }
.vin-decoder .vin-group-vds   { background: var(--vds-bg);   color: var(--vds-text); }
.vin-decoder .vin-group-check { background: var(--check-bg); color: var(--check-text); }
.vin-decoder .vin-group-vis   { background: var(--vis-bg);   color: var(--vis-text); }

/* Hover / focus states */
.vin-decoder .vin-group-wmi:hover,
.vin-decoder .vin-group-wmi:focus-visible,
.vin-decoder .vin-group-wmi.active {
  background: var(--wmi-bg-hover);
  border-color: var(--wmi-border);
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.25);
}

.vin-decoder .vin-group-vds:hover,
.vin-decoder .vin-group-vds:focus-visible,
.vin-decoder .vin-group-vds.active {
  background: var(--vds-bg-hover);
  border-color: var(--vds-border);
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.25);
}

.vin-decoder .vin-group-check:hover,
.vin-decoder .vin-group-check:focus-visible,
.vin-decoder .vin-group-check.active {
  background: var(--check-bg-hover);
  border-color: var(--check-border);
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.25);
}

.vin-decoder .vin-group-vis:hover,
.vin-decoder .vin-group-vis:focus-visible,
.vin-decoder .vin-group-vis.active {
  background: var(--vis-bg-hover);
  border-color: var(--vis-border);
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
}

/* Dim siblings when one is active */
.vin-decoder .vin-display.has-active .vin-char:not(.active) {
  opacity: 0.5;
}
.vin-decoder .vin-display.has-active .vin-char:not(.active):hover {
  opacity: 1;
}

/* --- Position Labels --- */
.vin-decoder .vin-positions {
  display: flex;
  justify-content: center;
  gap: 4px;
}

.vin-decoder .vin-pos-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  color: #9CA3AF;
}

/* --- Bracket Annotations --- */
.vin-decoder .vin-brackets {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 6px;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.vin-decoder .bracket {
  text-align: center;
  border-top: 2px solid;
  padding-top: 5px;
}

.vin-decoder .bracket-wmi {
  width: calc(3 * 44px + 2 * 4px);
  color: var(--wmi-border);
  border-color: var(--wmi-border);
}

.vin-decoder .bracket-vds {
  width: calc(5 * 44px + 4 * 4px);
  color: var(--vds-border);
  border-color: var(--vds-border);
}

.vin-decoder .bracket-check {
  width: 44px;
  color: var(--check-border);
  border-color: var(--check-border);
}

.vin-decoder .bracket-vis {
  width: calc(8 * 44px + 7 * 4px);
  color: var(--vis-border);
  border-color: var(--vis-border);
}

/* --- Info Panel --- */
.vin-decoder .vin-info-panel {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #D1D5DB;
  background: #F9FAFB;
  min-height: 100px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
  pointer-events: none;
}

.vin-decoder .vin-info-panel.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.vin-decoder .vin-info-panel.panel-wmi   { border-left-color: var(--wmi-border); }
.vin-decoder .vin-info-panel.panel-vds   { border-left-color: var(--vds-border); }
.vin-decoder .vin-info-panel.panel-check { border-left-color: var(--check-border); }
.vin-decoder .vin-info-panel.panel-vis   { border-left-color: var(--vis-border); }

.vin-decoder .info-panel-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.vin-decoder .info-position {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: #6B7280;
}

.vin-decoder .info-group-badge {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15em 0.6em;
  border-radius: 9999px;
  color: #fff;
}

.vin-decoder .badge-wmi   { background: var(--wmi-border); }
.vin-decoder .badge-vds   { background: var(--vds-border); }
.vin-decoder .badge-check { background: var(--check-border); }
.vin-decoder .badge-vis   { background: var(--vis-border); }

.vin-decoder .info-label {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: #111827;
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.vin-decoder .info-description {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: #374151;
  margin-bottom: 0.5rem;
}

.vin-decoder .info-examples {
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.vin-decoder .examples-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.75rem;
  margin: 0;
  padding: 0;
}

.vin-decoder .examples-list dt {
  font-family: var(--font-mono);
  font-weight: 600;
  color: #374151;
}

.vin-decoder .examples-list dd {
  color: #6B7280;
  margin: 0;
}

.vin-decoder .vin-note {
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: #9CA3AF;
  margin-top: 0.25rem;
  margin-bottom: 1rem;
  font-style: italic;
}

.vin-decoder .vin-note a {
  color: #9CA3AF;
  font-size: 0.75rem;
}

.vin-decoder .vin-hint {
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #9CA3AF;
  margin-top: 1.25rem;
  margin-bottom: 0;
}

/* ============================================================
   VIN Input Section
   ============================================================ */
.vin-decoder .vin-input-section {
  margin: 2rem 0;
}

.vin-decoder .input-wrapper {
  position: relative;
  max-width: 420px;
}

.vin-decoder #vin-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: 0.15em;
  padding: 0.75rem 1rem;
  padding-right: 4.5rem;
  border: 2px solid #D1D5DB;
  border-radius: 8px;
  background: #fff;
  color: #111827;
  outline: none;
  transition: border-color 0.2s ease;
}

.vin-decoder #vin-input::placeholder {
  color: #D1D5DB;
  letter-spacing: 0.08em;
}

.vin-decoder #vin-input:focus {
  border-color: var(--wmi-border);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.vin-decoder .char-count {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #9CA3AF;
  pointer-events: none;
}

.vin-decoder .validation-message {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  margin-top: 0.5rem;
  min-height: 1.4em;
}

.vin-decoder .validation-message.valid {
  color: var(--vis-text);
}

.vin-decoder .validation-message.invalid {
  color: var(--check-text);
}

/* ============================================================
   Blog Content Sections
   ============================================================ */
.vin-decoder .content-section {
  margin-top: 2rem;
}

.vin-decoder details.algorithm-details {
  margin: 1rem 0;
  padding: 1rem 1.25rem;
  background: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
}

.vin-decoder details.algorithm-details summary {
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  color: #374151;
}

.vin-decoder details.algorithm-details ol {
  margin-top: 0.75rem;
  margin-bottom: 0;
}

.vin-decoder details.algorithm-details p {
  margin-bottom: 0.5rem;
}

/* --- Transliteration & Weight Tables --- */
.vin-decoder .transliteration-table-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0.5rem 0 1rem;
}

.vin-decoder .transliteration-table,
.vin-decoder .weight-table {
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.vin-decoder .transliteration-table th,
.vin-decoder .transliteration-table td,
.vin-decoder .weight-table th,
.vin-decoder .weight-table td {
  padding: 0.3rem 0.5rem;
  text-align: center;
  border: 1px solid #E5E7EB;
}

.vin-decoder .transliteration-table th,
.vin-decoder .weight-table th {
  background: #F3F4F6;
  font-weight: 600;
}

.vin-decoder .transliteration-table td,
.vin-decoder .weight-table td {
  background: #fff;
}

.vin-decoder .weight-table-wrapper {
  overflow-x: auto;
  margin: 0.5rem 0 1rem;
  -webkit-overflow-scrolling: touch;
}

/* --- Model Year Table --- */
.vin-decoder .year-table-wrapper {
  overflow-x: auto;
  margin: 1rem 0;
  -webkit-overflow-scrolling: touch;
}

.vin-decoder .year-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.vin-decoder .year-table th {
  background: #F3F4F6;
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 2px solid #D1D5DB;
}

.vin-decoder .year-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid #E5E7EB;
}

.vin-decoder .year-table tr:hover td {
  background: #F9FAFB;
}

/* --- Sources Section --- */
.vin-decoder .sources-section {
  margin-top: 3rem;
}

.vin-decoder .sources-list {
  margin: 1rem 0 0;
  padding: 0;
}

.vin-decoder .sources-list dt {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: #111827;
  margin-top: 1.25rem;
}

.vin-decoder .sources-list dt:first-child {
  margin-top: 0;
}

.vin-decoder .sources-list dd {
  margin: 0.25rem 0 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #4B5563;
}

.vin-decoder .sources-list dd a {
  font-size: 0.9rem;
}

/* ============================================================
   Post Footer
   ============================================================ */
.vin-decoder .post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #E5E7EB;
  font-size: 0.9rem;
  color: #6B7280;
}

/* ============================================================
   Responsive Design
   ============================================================ */
@media (max-width: 768px) {
  .vin-decoder .vin-char {
    width: 36px;
    height: 48px;
    font-size: 1.25rem;
  }

  .vin-decoder .vin-pos-label {
    width: 36px;
    font-size: 0.55rem;
  }

  .vin-decoder .vin-display,
  .vin-decoder .vin-positions {
    gap: 3px;
  }

  .vin-decoder .vin-brackets {
    gap: 3px;
  }

  .vin-decoder .bracket-wmi   { width: calc(3 * 36px + 2 * 3px); }
  .vin-decoder .bracket-vds   { width: calc(5 * 36px + 4 * 3px); }
  .vin-decoder .bracket-check { width: 36px; }
  .vin-decoder .bracket-vis   { width: calc(8 * 36px + 7 * 3px); }
}

@media (max-width: 540px) {
  .vin-decoder {
    font-size: 1rem;
  }

  .vin-decoder .vin-interactive {
    padding: 1.25rem 0.75rem;
    border-radius: 8px;
  }

  .vin-decoder .vin-char {
    width: 30px;
    height: 40px;
    font-size: 1rem;
    border-radius: 4px;
  }

  .vin-decoder .vin-pos-label {
    width: 30px;
    font-size: 0.5rem;
  }

  .vin-decoder .vin-display,
  .vin-decoder .vin-positions {
    gap: 2px;
  }

  .vin-decoder .vin-brackets {
    display: none;
  }

  .vin-decoder .vin-legend {
    gap: 0.5rem;
    font-size: 0.7rem;
  }

  .vin-decoder .info-label {
    font-size: 1rem;
  }

  .vin-decoder .info-description {
    font-size: 0.85rem;
  }

  .vin-decoder h2 { font-size: 1.3rem; }
}

@media (max-width: 380px) {
  .vin-decoder .vin-display {
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .vin-decoder .vin-positions {
    overflow-x: auto;
    justify-content: flex-start;
  }
}

/* ============================================================
   Accessibility
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .vin-decoder *,
  .vin-decoder *::before,
  .vin-decoder *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.vin-decoder .vin-char:focus-visible {
  outline: 2px solid #111827;
  outline-offset: 2px;
}