/* ==========================================================================
   PVV Visual Elements v2 — Theme CSS
   Deploy once per site. All classes prefixed with pvv- to avoid conflicts.
   ========================================================================== */

/* --- CSS Variables (Dark/Light mode) --- */
:root {
  --pvv-bg: #ffffff;
  --pvv-text: #1a1a2e;
  --pvv-text-secondary: #555555;
  --pvv-border: #e0e0e0;
  --pvv-accent: #2563eb;
  --pvv-accent-light: #dbeafe;
  --pvv-green: #16a34a;
  --pvv-green-light: #dcfce7;
  --pvv-blue: #2563eb;
  --pvv-blue-light: #dbeafe;
  --pvv-grey: #6b7280;
  --pvv-grey-light: #f3f4f6;
  --pvv-highlight-bg: #fef3c7;
  --pvv-shadow: rgba(0, 0, 0, 0.08);
  --pvv-timeline-line: #d1d5db;
  --pvv-timeline-dot: #2563eb;
  --pvv-faq-bg: #f9fafb;
  --pvv-radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --pvv-bg: #1a1a2e;
    --pvv-text: #e2e8f0;
    --pvv-text-secondary: #94a3b8;
    --pvv-border: #334155;
    --pvv-accent: #60a5fa;
    --pvv-accent-light: #1e3a5f;
    --pvv-green: #4ade80;
    --pvv-green-light: #14532d;
    --pvv-blue: #60a5fa;
    --pvv-blue-light: #1e3a5f;
    --pvv-grey: #9ca3af;
    --pvv-grey-light: #1f2937;
    --pvv-highlight-bg: #422006;
    --pvv-shadow: rgba(0, 0, 0, 0.3);
    --pvv-timeline-line: #475569;
    --pvv-timeline-dot: #60a5fa;
    --pvv-faq-bg: #0f172a;
    --pvv-radius: 8px;
  }
}

/* ==========================================================================
   TIMELINE
   ========================================================================== */

.pvv-timeline {
  position: relative;
  margin: 2rem 0;
  padding: 0 0 0 2rem;
}

.pvv-timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--pvv-timeline-line);
}

.pvv-timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
  display: block;
}

.pvv-timeline-item:last-child {
  margin-bottom: 0;
}

.pvv-timeline-dot {
  position: absolute;
  left: -1.75rem;
  top: 0.25rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pvv-timeline-dot);
  border: 2px solid var(--pvv-bg);
  box-shadow: 0 0 0 2px var(--pvv-timeline-dot);
}

.pvv-timeline-content {
  background: var(--pvv-bg);
  border: 1px solid var(--pvv-border);
  border-radius: var(--pvv-radius);
  padding: 1rem 1.25rem;
}

.pvv-timeline-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--pvv-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.pvv-timeline-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pvv-text);
  margin-bottom: 0.25rem;
}

.pvv-timeline-detail {
  font-size: 0.9rem;
  color: var(--pvv-text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   TABLE
   ========================================================================== */

.pvv-table-wrap {
  margin: 2rem 0;
  border: 1px solid var(--pvv-border);
  border-radius: var(--pvv-radius);
  overflow: hidden;
  background: var(--pvv-bg);
}

.pvv-table-title {
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--pvv-text);
  border-bottom: 1px solid var(--pvv-border);
}

.pvv-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pvv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.pvv-table-th {
  background: var(--pvv-grey-light);
  color: var(--pvv-text);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--pvv-border);
  white-space: nowrap;
}

.pvv-table-td {
  padding: 0.65rem 1rem;
  color: var(--pvv-text);
  border-bottom: 1px solid var(--pvv-border);
  vertical-align: top;
}

.pvv-table tbody tr:nth-child(even) {
  background: var(--pvv-grey-light);
}

.pvv-table tbody tr:last-child .pvv-table-td {
  border-bottom: none;
}

.pvv-table tbody tr.pvv-highlight {
  background: var(--pvv-highlight-bg);
}

.pvv-table-source {
  padding: 0.6rem 1.25rem;
  font-size: 0.8rem;
  color: var(--pvv-text-secondary);
  border-top: 1px solid var(--pvv-border);
}

.pvv-table-source a {
  color: var(--pvv-accent);
  text-decoration: underline;
}

.pvv-table-note {
  padding: 0.5rem 1.25rem 0.75rem;
  font-size: 0.8rem;
  color: var(--pvv-text-secondary);
  font-style: italic;
}

/* ==========================================================================
   CALCULATOR (iframe wrapper)
   ========================================================================== */

.pvv-calculator-wrap {
  margin: 2rem 0;
}

.pvv-calculator-iframe {
  width: 100%;
  min-height: 400px;
  border: 1px solid var(--pvv-border);
  border-radius: var(--pvv-radius);
  background: var(--pvv-bg);
}

/* ==========================================================================
   FAQ
   ========================================================================== */

.pvv-faq {
  margin: 2rem 0;
}

.pvv-faq-heading {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--pvv-text);
  margin-bottom: 1rem;
}

.pvv-faq-item {
  margin-bottom: 0.5rem;
}

.pvv-faq-details {
  border: 1px solid var(--pvv-border);
  border-radius: var(--pvv-radius);
  overflow: hidden;
}

.pvv-faq-question {
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--pvv-text);
  cursor: pointer;
  background: var(--pvv-faq-bg);
  list-style: none;
}

.pvv-faq-question::-webkit-details-marker {
  display: none;
}

.pvv-faq-question::before {
  content: '+';
  display: inline-block;
  width: 1.25rem;
  font-weight: 700;
  color: var(--pvv-accent);
}

.pvv-faq-details[open] > .pvv-faq-question::before {
  content: '\2212';
}

.pvv-faq-answer {
  padding: 0.75rem 1.25rem 1rem;
  color: var(--pvv-text-secondary);
  line-height: 1.6;
}

.pvv-faq-answer p {
  margin: 0;
}

/* ==========================================================================
   SOURCE BADGES
   ========================================================================== */

.pvv-sources {
  margin: 2rem 0;
  padding: 1.25rem;
  background: var(--pvv-grey-light);
  border-radius: var(--pvv-radius);
}

.pvv-sources-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--pvv-text);
  margin-bottom: 0.75rem;
}

.pvv-sources-grid {
  display: block;
}

.pvv-badge {
  display: block;
  padding: 0.6rem 0.85rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  border-left: 4px solid transparent;
}

.pvv-badge:last-child {
  margin-bottom: 0;
}

.pvv-badge-primary {
  background: var(--pvv-green-light);
  border-left-color: var(--pvv-green);
}

.pvv-badge-expert {
  background: var(--pvv-blue-light);
  border-left-color: var(--pvv-blue);
}

.pvv-badge-secondary {
  background: var(--pvv-grey-light);
  border-left-color: var(--pvv-grey);
}

.pvv-badge-type {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pvv-text-secondary);
  margin-right: 0.5rem;
}

.pvv-badge-link {
  color: var(--pvv-accent);
  text-decoration: underline;
  font-weight: 500;
}

.pvv-badge-name {
  font-weight: 500;
  color: var(--pvv-text);
}

.pvv-badge-accessed {
  display: block;
  font-size: 0.75rem;
  color: var(--pvv-text-secondary);
  margin-top: 0.15rem;
}

/* ==========================================================================
   MOBILE RESPONSIVE (768px breakpoint)
   ========================================================================== */

@media screen and (max-width: 768px) {
  .pvv-timeline {
    padding-left: 1.5rem;
  }

  .pvv-timeline::before {
    left: 0.35rem;
  }

  .pvv-timeline-dot {
    left: -1.4rem;
    width: 10px;
    height: 10px;
  }

  .pvv-timeline-content {
    padding: 0.75rem 1rem;
  }

  .pvv-timeline-date {
    font-size: 0.75rem;
  }

  .pvv-timeline-label {
    font-size: 0.9rem;
  }

  .pvv-timeline-detail {
    font-size: 0.85rem;
  }

  .pvv-table {
    font-size: 0.8rem;
  }

  .pvv-table-th {
    padding: 0.5rem 0.65rem;
  }

  .pvv-table-td {
    padding: 0.45rem 0.65rem;
  }

  .pvv-calculator-iframe {
    min-height: 300px;
  }

  .pvv-faq-question {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }

  .pvv-faq-answer {
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.9rem;
  }

  .pvv-sources {
    padding: 1rem;
  }

  .pvv-badge {
    padding: 0.5rem 0.7rem;
  }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  .pvv-timeline::before {
    background: #999;
  }

  .pvv-timeline-dot {
    background: #333;
    box-shadow: none;
  }

  .pvv-timeline-content,
  .pvv-table-wrap,
  .pvv-faq-details,
  .pvv-sources,
  .pvv-badge {
    border-color: #ccc;
    box-shadow: none;
  }

  .pvv-calculator-wrap {
    display: none;
  }

  .pvv-faq-details {
    open: true;
  }

  .pvv-faq-details[open] > .pvv-faq-answer,
  .pvv-faq-answer {
    display: block;
  }

  .pvv-badge-link {
    color: #000;
    text-decoration: underline;
  }

  .pvv-table-scroll {
    overflow-x: visible;
  }
}