/* ── Product viewer layout ───────────────────────────────────────────────── */

.product-layout {
  display: flex;
  min-height: 100vh;
  padding-top: 64px; /* nav height */
}

/* ── TOC Sidebar ─────────────────────────────────────────────────────────── */

.product-toc {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  background: var(--navy);
  color: var(--white);
  padding: 28px 0 40px;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: rgba(200,151,58,0.3) transparent;
}

.toc-header {
  padding: 0 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 8px;
}

.toc-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 6px;
}

.toc-product-name {
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 8px;
}

.toc-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 20px;
  margin-right: 6px;
}
.toc-badge--published { background: rgba(34,197,94,0.18); color: #4ade80; }
.toc-badge--draft     { background: rgba(250,204,21,0.18); color: #facc15; }
.toc-badge--review    { background: rgba(59,130,246,0.18); color: #60a5fa; }
.toc-badge--archived  { background: rgba(148,163,184,0.18); color: #94a3b8; }

.toc-version {
  display: inline-block;
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  vertical-align: middle;
}

.toc-nav {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.toc-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 24px;
  text-decoration: none;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  line-height: 1.35;
  transition: background 0.15s, color 0.15s;
  border-left: 2px solid transparent;
}
.toc-item:hover {
  color: var(--white);
  background: rgba(255,255,255,0.05);
}
.toc-item--active {
  color: var(--white);
  border-left-color: var(--amber);
  background: rgba(200,151,58,0.08);
}

.toc-code {
  flex-shrink: 0;
  font-family: 'Source Sans 3', monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--amber);
  width: 28px;
  padding-top: 1px;
}

.toc-title-short {
  flex: 1;
}

.toc-actions {
  padding: 16px 24px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-action-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.15s;
}
.toc-action-link:hover { color: var(--amber); }

/* ── Main document area ──────────────────────────────────────────────────── */

.product-main {
  flex: 1;
  min-width: 0;
  padding: 40px 56px 80px;
  max-width: 880px;
}

.product-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--cream-dark);
}

.product-header-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.product-status-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 20px;
}
.product-status-badge--published { background: #dcfce7; color: #166534; }
.product-status-badge--draft     { background: #fef9c3; color: #854d0e; }
.product-status-badge--review    { background: #dbeafe; color: #1e40af; }
.product-status-badge--archived  { background: #f1f5f9; color: #475569; }

.product-meta-sep { color: var(--ink-muted); font-size: 13px; }
.product-meta-item { color: var(--ink-muted); font-size: 13px; }
.product-meta-link { color: var(--amber); font-size: 13px; text-decoration: none; }
.product-meta-link:hover { text-decoration: underline; }

.product-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.2;
}

.product-subtitle {
  font-size: 14px;
  color: var(--ink-muted);
  margin-bottom: 20px;
}

.product-header-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-secondary-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  background: var(--cream-dark);
  border: 1px solid rgba(26,35,50,0.15);
  padding: 7px 14px;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn-secondary-sm:hover {
  background: var(--cream);
  border-color: var(--amber);
  color: var(--amber);
}

/* ── SmPC sections ───────────────────────────────────────────────────────── */

.smpc-section {
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(26,35,50,0.08);
  scroll-margin-top: 80px;
}
.smpc-section:last-child { border-bottom: none; }

.smpc-section-header {
  margin-bottom: 16px;
}

.smpc-section-title-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.smpc-section-code {
  flex-shrink: 0;
  font-family: 'Source Sans 3', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  background: rgba(200,151,58,0.1);
  border-radius: 4px;
  padding: 2px 8px;
  min-width: 36px;
  text-align: center;
}

.smpc-section-title {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
}

/* Provenance row */
.smpc-provenance {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--ink-muted);
}

.prov-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.prov-item--hash {
  font-family: monospace;
  font-size: 11px;
  background: rgba(26,35,50,0.06);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--ink-muted);
  cursor: default;
}

.prov-sep { color: rgba(26,35,50,0.3); }

.prov-link {
  color: var(--amber);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
}
.prov-link:hover { text-decoration: underline; }

.smpc-source-ref {
  font-size: 11px;
  color: rgba(26,35,50,0.45);
  display: flex;
  align-items: center;
  gap: 5px;
  font-style: italic;
}

.smpc-content {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 720px;
  white-space: pre-wrap;
}

/* ── Page header (shared) ────────────────────────────────────────────────── */

.page-header {
  background: var(--navy);
  color: var(--white);
  padding: 80px 56px 60px;
}

.page-header-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 14px;
}

.page-header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.15;
}

.page-header p {
  font-size: 16px;
  color: rgba(255,255,255,0.65);
  max-width: 640px;
  line-height: 1.65;
}

.page-header-sub {
  margin-bottom: 8px !important;
}

.back-link {
  color: var(--amber);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}
.back-link:hover { text-decoration: underline; }

/* ── Audit log page ──────────────────────────────────────────────────────── */

.audit-section { padding: 48px 56px; }

.audit-wrap { max-width: 1100px; margin: 0 auto; }

.audit-meta-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--ink-muted);
}

.audit-product-badge {
  font-weight: 600;
  color: var(--navy);
  font-size: 14px;
}

.audit-meta-sep { color: rgba(26,35,50,0.3); }

.audit-empty {
  text-align: center;
  color: var(--ink-muted);
  padding: 48px 0;
  font-size: 15px;
}

.audit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.audit-table thead th {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 12px 16px;
  border-bottom: 2px solid var(--cream-dark);
  text-align: left;
  white-space: nowrap;
}

.audit-table tbody tr {
  border-bottom: 1px solid rgba(26,35,50,0.06);
  transition: background 0.1s;
}
.audit-table tbody tr:hover { background: rgba(200,151,58,0.04); }

.audit-table td {
  padding: 12px 16px;
  vertical-align: top;
}

.audit-ts {
  font-family: monospace;
  font-size: 12px;
  color: var(--ink-muted);
  white-space: nowrap;
}

.action-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}
.action-badge--create  { background: #dbeafe; color: #1e40af; }
.action-badge--edit    { background: #fef9c3; color: #92400e; }
.action-badge--approve { background: #dcfce7; color: #166534; }
.action-badge--publish { background: rgba(200,151,58,0.15); color: #92400e; }
.action-badge--verify  { background: #f0f9ff; color: #0369a1; }
.action-badge--generate { background: #f5f3ff; color: #5b21b6; }

.audit-actor { font-size: 13px; color: var(--ink); }

.audit-ip code {
  font-family: monospace;
  font-size: 12px;
  background: rgba(26,35,50,0.06);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--ink-muted);
}

.hash-chip {
  font-family: monospace;
  font-size: 11px;
  background: rgba(26,35,50,0.07);
  border: 1px solid rgba(26,35,50,0.12);
  padding: 2px 7px;
  border-radius: 4px;
  cursor: default;
  color: var(--ink-muted);
}
.hash-chip--new { background: rgba(34,197,94,0.1); border-color: rgba(34,197,94,0.3); color: #166534; }
.hash-na { color: rgba(26,35,50,0.3); }

.audit-notes { font-size: 13px; color: var(--ink-muted); max-width: 280px; }

.audit-integrity-note {
  padding: 24px 56px 48px;
}

.integrity-inner {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: rgba(200,151,58,0.06);
  border: 1px solid rgba(200,151,58,0.2);
  border-radius: 8px;
  padding: 20px 24px;
  max-width: 720px;
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
}
.integrity-inner strong { color: var(--navy); }

/* ── Section history page ────────────────────────────────────────────────── */

.history-section { padding: 48px 56px; }
.history-wrap { max-width: 820px; margin: 0 auto; }

.history-entry {
  margin-bottom: 32px;
  border: 1px solid rgba(26,35,50,0.1);
  border-radius: 10px;
  overflow: hidden;
}
.history-entry--current {
  border-color: var(--amber);
  box-shadow: 0 0 0 2px rgba(200,151,58,0.12);
}

.history-entry-header {
  padding: 16px 20px;
  background: rgba(26,35,50,0.03);
  border-bottom: 1px solid rgba(26,35,50,0.08);
}

.history-version-badge {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-muted);
  margin-bottom: 8px;
}
.history-version-badge--current {
  color: var(--amber);
}

.history-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--ink-muted);
  margin-bottom: 8px;
}

.history-change-note {
  font-size: 12px;
  color: var(--ink-muted);
  font-style: italic;
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.5;
}

.history-content {
  padding: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  white-space: pre-wrap;
  background: var(--white);
}

/* ── Diff page ───────────────────────────────────────────────────────────── */

.diff-section { padding: 32px 56px 80px; }
.diff-wrap { max-width: 900px; margin: 0 auto; }

.diff-selector {
  background: rgba(26,35,50,0.03);
  border: 1px solid rgba(26,35,50,0.1);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.diff-selector-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.diff-selector-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: 90px;
  flex-shrink: 0;
}

.diff-version-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.diff-version-btn {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border: 1px solid rgba(26,35,50,0.18);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s;
}
.diff-version-btn:hover:not(:disabled) {
  border-color: var(--amber);
  color: var(--amber);
}
.diff-version-btn--active {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.diff-version-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.diff-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--ink-muted);
}

.diff-summary-badge {
  font-weight: 700;
  color: var(--navy);
  background: rgba(200,151,58,0.12);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: 13px;
}

.diff-summary-sep { color: rgba(26,35,50,0.3); }

.diff-section-block {
  margin-bottom: 16px;
  border: 1px solid rgba(26,35,50,0.08);
  border-radius: 8px;
  overflow: hidden;
}
.diff-section-block--changed { border-color: rgba(200,151,58,0.35); }
.diff-section-block--equal   { opacity: 0.6; }

.diff-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: rgba(26,35,50,0.03);
  border-bottom: 1px solid rgba(26,35,50,0.08);
}
.diff-section-block--changed .diff-section-header {
  background: rgba(200,151,58,0.06);
}

.diff-section-title {
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  flex: 1;
}

.diff-unchanged-badge {
  font-size: 11px;
  font-weight: 600;
  color: rgba(26,35,50,0.4);
  background: rgba(26,35,50,0.06);
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.diff-changed-badge {
  font-size: 11px;
  font-weight: 700;
  color: #92400e;
  background: rgba(200,151,58,0.15);
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.diff-hash-pair {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-muted);
}

.diff-body {
  font-family: 'Source Sans 3', monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
}

.diff-line {
  display: flex;
  align-items: flex-start;
  gap: 0;
  min-height: 22px;
}
.diff-line--add    { background: rgba(34, 197, 94, 0.1); }
.diff-line--remove { background: rgba(239, 68, 68, 0.08); }
.diff-line--equal  { background: transparent; }

.diff-gutter {
  width: 28px;
  flex-shrink: 0;
  font-weight: 700;
  padding: 2px 8px;
  font-size: 13px;
  text-align: center;
  color: rgba(26,35,50,0.35);
  user-select: none;
}
.diff-line--add .diff-gutter    { color: #166534; background: rgba(34,197,94,0.15); }
.diff-line--remove .diff-gutter { color: #991b1b; background: rgba(239,68,68,0.12); }

.diff-text {
  flex: 1;
  padding: 2px 12px;
  white-space: pre-wrap;
  word-break: break-word;
}
.diff-line--add .diff-text    { color: #166534; }
.diff-line--remove .diff-text { color: #991b1b; text-decoration: line-through; text-decoration-color: rgba(153,27,27,0.4); }

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .product-toc {
    display: none;
  }
  .product-main {
    padding: 32px 24px 60px;
  }
  .page-header {
    padding: 60px 24px 40px;
  }
  .audit-section,
  .history-section,
  .diff-section {
    padding: 32px 24px;
  }
  .audit-integrity-note {
    padding: 16px 24px 32px;
  }
}