/* === Base === */
:root {
  --eu-color: #003399;
  --eu-bg: #e8edf5;
  --dpp40-color: #0f7b3f;
  --dpp40-bg: #e6f4ec;
  --untp-color: #0077b6;
  --untp-bg: #e3f0f9;
  --exact-color: #16a34a;
  --partial-color: #d97706;
  --none-color: #9ca3af;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }

/* === Header === */
header { background: linear-gradient(135deg, var(--eu-color), var(--untp-color)); color: white; padding: 1.5rem 2rem; display: flex; justify-content: space-between; align-items: center; }
header h1 { font-size: 1.5rem; font-weight: 700; }
.subtitle { font-size: 1rem; opacity: 0.9; margin-top: 0.25rem; }
.subtitle-small { font-size: 0.8rem; opacity: 0.7; margin-top: 0.25rem; }
.logo { height: 50px; }

/* === Nav === */
.main-nav { display: flex; gap: 0; background: var(--surface); border-bottom: 2px solid var(--border); padding: 0 1rem; overflow-x: auto; }
.nav-btn { padding: 0.75rem 1.25rem; border: none; background: none; cursor: pointer; font-size: 0.875rem; font-weight: 500; color: var(--text-muted); border-bottom: 2px solid transparent; margin-bottom: -2px; white-space: nowrap; transition: all 0.15s; }
.nav-btn:hover { color: var(--text); background: var(--bg); }
.nav-btn.active { color: var(--eu-color); border-bottom-color: var(--eu-color); font-weight: 600; }

/* === Views === */
main { max-width: 1280px; margin: 0 auto; padding: 1.5rem; }
.view { display: none; }
.view.active { display: block; }

/* === Framework Cards === */
.frameworks-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.framework-card { background: var(--surface); border-radius: var(--radius); padding: 1.25rem; border-left: 4px solid; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.framework-card.eu-dpp { border-color: var(--eu-color); }
.framework-card.dpp-40 { border-color: var(--dpp40-color); }
.framework-card.untp-dpp { border-color: var(--untp-color); }
.framework-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.framework-header h2 { font-size: 1.1rem; }
.badge { font-size: 0.65rem; padding: 2px 6px; border-radius: 3px; background: var(--border); color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.framework-desc { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.framework-meta { margin-bottom: 0.75rem; }
.ref-link { font-size: 0.75rem; color: var(--eu-color); text-decoration: none; }
.ref-link:hover { text-decoration: underline; }
.framework-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }
.stat { text-align: center; }
.stat-value { display: block; font-size: 1.3rem; font-weight: 700; color: var(--text); }
.stat-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }

/* === Summary === */
.overview-summary { background: var(--surface); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.overview-summary h3 { font-size: 1rem; margin-bottom: 1rem; }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-bottom: 1rem; }
.summary-card { text-align: center; padding: 0.75rem; border-radius: var(--radius); background: var(--bg); }
.summary-card.exact { border-left: 3px solid var(--exact-color); }
.summary-card.partial { border-left: 3px solid var(--partial-color); }
.summary-card.none { border-left: 3px solid var(--none-color); }
.summary-value { display: block; font-size: 1.5rem; font-weight: 700; }
.summary-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; }

/* === Progress Bar === */
.progress-bar-container { margin-top: 0.5rem; }
.progress-bar { display: flex; height: 10px; border-radius: 5px; overflow: hidden; background: var(--border); }
.progress-segment { transition: width 0.4s ease; }
.progress-segment.exact { background: var(--exact-color); }
.progress-segment.partial { background: var(--partial-color); }
.progress-segment.none { background: var(--none-color); }
.progress-labels { display: flex; justify-content: space-between; margin-top: 0.25rem; font-size: 0.7rem; color: var(--text-muted); }

/* === Characteristics Table === */
.overview-comparison-table { background: var(--surface); border-radius: var(--radius); padding: 1.25rem; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.overview-comparison-table h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.char-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.char-table th, .char-table td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
.char-table th { background: var(--bg); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.3px; color: var(--text-muted); }
.char-table th:nth-child(2) { color: var(--eu-color); }
.char-table th:nth-child(3) { color: var(--dpp40-color); }
.char-table th:nth-child(4) { color: var(--untp-color); }

/* === Browse === */
.browse-controls { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.control-group { display: flex; align-items: center; gap: 0.25rem; }
.control-group label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); }
.control-group select, .control-group input { padding: 0.4rem 0.6rem; border: 1px solid var(--border); border-radius: 4px; font-size: 0.8rem; background: var(--surface); }
.search-group { flex: 1; min-width: 200px; }
.search-group input { width: 100%; }
.requirements-count { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.requirements-table-container { overflow-x: auto; background: var(--surface); border-radius: var(--radius); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.requirements-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.requirements-table th { background: var(--bg); padding: 0.6rem 0.75rem; text-align: left; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.3px; color: var(--text-muted); border-bottom: 2px solid var(--border); position: sticky; top: 0; }
.requirements-table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); }
.req-row { cursor: pointer; transition: background 0.1s; }
.req-row:hover { background: var(--bg); }
.req-id { font-size: 0.75rem; font-family: 'SF Mono', 'Fira Code', monospace; color: var(--eu-color); background: var(--eu-bg); padding: 1px 4px; border-radius: 3px; }
.fw-badge { font-size: 0.65rem; padding: 2px 6px; border-radius: 3px; font-weight: 600; color: white; white-space: nowrap; }
.fw-badge.eu-dpp { background: var(--eu-color); }
.fw-badge.dpp-40 { background: var(--dpp40-color); }
.fw-badge.untp-dpp { background: var(--untp-color); }
.mand-badge { font-size: 0.65rem; padding: 1px 5px; border-radius: 3px; font-weight: 600; }
.mand-badge.yes { background: #dcfce7; color: #166534; }
.mand-badge.no { background: #f1f5f9; color: #64748b; }
.mand-badge.small { font-size: 0.6rem; }
.cat-cell { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.src-link { font-size: 0.75rem; color: var(--eu-color); text-decoration: none; }
.src-link:hover { text-decoration: underline; }

/* === Compare === */
.compare-header { margin-bottom: 1rem; }
.compare-header h3 { font-size: 1rem; }
.compare-header p { font-size: 0.8rem; color: var(--text-muted); }
.category-tabs { display: flex; gap: 0; flex-wrap: wrap; border-bottom: 2px solid var(--border); margin-bottom: 1rem; }
.category-tab { padding: 0.5rem 1rem; border: none; background: none; cursor: pointer; font-size: 0.8rem; color: var(--text-muted); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.15s; white-space: nowrap; }
.category-tab:hover { color: var(--text); }
.category-tab.active { color: var(--eu-color); border-bottom-color: var(--eu-color); font-weight: 600; }

.compare-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.compare-table th { padding: 0.6rem 0.75rem; text-align: left; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.3px; background: var(--bg); border-bottom: 2px solid var(--border); }
.compare-table th.eu-dpp { color: var(--eu-color); }
.compare-table th.dpp-40 { color: var(--dpp40-color); }
.compare-table th.untp-dpp { color: var(--untp-color); }
.compare-table td { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.compare-table .empty-cell { color: var(--text-muted); font-style: italic; }
.cell-name { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.15rem; }
.concept-note { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.25rem; font-style: italic; }
.clickable { cursor: pointer; }
.clickable:hover { text-decoration: underline; }

/* === Equivalence Badges === */
.eq-badge { font-size: 0.65rem; padding: 2px 6px; border-radius: 3px; font-weight: 600; text-transform: capitalize; }
.eq-badge.exact { background: #dcfce7; color: #166534; }
.eq-badge.partial { background: #fef3c7; color: #92400e; }
.eq-badge.none { background: #f1f5f9; color: #64748b; }

/* === Mappings === */
.mappings-header { margin-bottom: 1rem; }
.mappings-header h3 { font-size: 1rem; }
.mappings-header p { font-size: 0.8rem; color: var(--text-muted); }
.mapping-legend { display: flex; gap: 1.5rem; margin-bottom: 1rem; font-size: 0.8rem; }
.legend-item { display: flex; align-items: center; gap: 0.35rem; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.legend-dot.exact { background: var(--exact-color); }
.legend-dot.partial { background: var(--partial-color); }
.legend-dot.none { background: var(--none-color); }

.mapping-group { margin-bottom: 1.5rem; }
.mapping-group-title { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.5rem; padding-bottom: 0.25rem; border-bottom: 1px solid var(--border); }
.mapping-table { width: 100%; border-collapse: collapse; font-size: 0.78rem; background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.mapping-table th { padding: 0.5rem 0.6rem; text-align: left; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.3px; background: var(--bg); border-bottom: 2px solid var(--border); }
.mapping-table td { padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); }
.eq-row.exact { border-left: 3px solid var(--exact-color); }
.eq-row.partial { border-left: 3px solid var(--partial-color); }
.eq-row.none { border-left: 3px solid var(--none-color); }
.notes-cell { font-size: 0.72rem; color: var(--text-muted); max-width: 300px; }

/* === References === */
.references-header { margin-bottom: 1rem; }
.references-header h3 { font-size: 1rem; }
.references-header p { font-size: 0.8rem; color: var(--text-muted); }
.references-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 0.75rem; }
.ref-card { background: var(--surface); border-radius: var(--radius); padding: 1rem; border-left: 3px solid var(--eu-color); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.ref-card h4 { font-size: 0.85rem; margin-bottom: 0.25rem; }
.ref-card a { font-size: 0.72rem; color: var(--eu-color); word-break: break-all; }

/* === Modal === */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; align-items: center; justify-content: center; }
.modal.open { display: flex; }
.modal-content { background: var(--surface); border-radius: var(--radius); max-width: 600px; width: 90%; max-height: 80vh; overflow-y: auto; padding: 1.5rem; position: relative; }
.modal-close { position: absolute; top: 0.75rem; right: 0.75rem; border: none; background: none; font-size: 1.25rem; cursor: pointer; color: var(--text-muted); }
.modal-close:hover { color: var(--text); }
#modal-header { margin-bottom: 1rem; }
#modal-header h3 { margin: 0.5rem 0 0.25rem; }
.detail-section { margin-bottom: 1rem; }
.detail-section h4 { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; margin-bottom: 0.25rem; }
.detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
.detail-item { display: flex; flex-direction: column; }
.detail-label { font-size: 0.7rem; color: var(--text-muted); }

/* === Intro & Key Findings === */
.intro-text { background: var(--surface); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.5rem; font-size: 0.85rem; color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.06); border-left: 4px solid var(--eu-color); }
.intro-text p { margin: 0; }
.browse-intro { margin-bottom: 1rem; font-size: 0.8rem; color: var(--text-muted); }
.key-findings-section { background: var(--surface); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.key-findings-section h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.key-findings-section ul { margin: 0; padding-left: 1.25rem; font-size: 0.8rem; }
.key-findings-section li { margin-bottom: 0.4rem; }
.key-findings-section li strong { color: var(--eu-color); }

/* === Author-Constructed Badge === */
.ac-badge { display: inline-block; background: #fef3c7; color: #92400e; font-size: 0.65rem; font-weight: 700; padding: 0 3px; border-radius: 2px; cursor: help; vertical-align: super; }
.ac-notice { background: #fef3c7; border: 1px solid #fcd34d; border-radius: var(--radius); padding: 0.6rem 0.8rem; font-size: 0.78rem; color: #92400e; margin-bottom: 1rem; }
.ac-explainer { background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius); padding: 0.5rem 0.75rem; margin-top: 0.5rem; font-size: 0.78rem; }
.ac-explainer summary { cursor: pointer; font-weight: 600; color: #92400e; font-size: 0.8rem; }
.ac-explainer p { margin: 0.5rem 0 0; color: #78350f; line-height: 1.5; }
.stat.full-width { grid-column: 1 / -1; }
.stat-note { font-size: 0.68rem; color: var(--partial-color); font-style: italic; }

/* === Tab count === */
.tab-count { font-size: 0.65rem; background: var(--border); color: var(--text-muted); padding: 1px 5px; border-radius: 8px; margin-left: 3px; }
.group-count { font-size: 0.75rem; color: var(--text-muted); font-weight: 400; }
.dim { color: var(--none-color); }

/* === Reference note === */
.ref-note { background: var(--surface); border-radius: var(--radius); padding: 1rem; margin-top: 1.5rem; font-size: 0.8rem; color: var(--text-muted); border-left: 3px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.ref-note a { color: var(--eu-color); }

/* === Footer === */
footer { text-align: center; padding: 1.5rem; font-size: 0.75rem; color: var(--text-muted); border-top: 1px solid var(--border); margin-top: 2rem; }

/* === Responsive === */
@media (max-width: 768px) {
  .frameworks-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .framework-stats { grid-template-columns: repeat(2, 1fr); }
  .browse-controls { flex-direction: column; }
  header { flex-direction: column; text-align: center; }
}