/* ============================================================
   LAYOUT
   ============================================================ */
.layout {
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
}

.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  padding: 56px var(--content-pad) 80px;
  max-width: calc(900px + var(--content-pad) * 2 + var(--sidebar-w));
  overflow-x: hidden;
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  margin-bottom: var(--section-gap);
  scroll-margin-top: 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), transparent);
}

.section-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--gold);
  background: var(--navy);
  padding: 6px 13px;
  border-radius: 20px;
  letter-spacing: 1px;
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
}

.section-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.3px;
  border: none;
  padding: 0;
  margin: 0;
  line-height: 1.3;
}

/* ============================================================
   RESPONSIVE CONTENT
   ============================================================ */
@media (max-width: 1024px) {
  .content {
    margin-left: 0;
    /* top padding accounts for mobile topbar (56px) + breathing room */
    padding: 72px 36px 60px;
  }
}
@media (max-width: 640px) {
  :root {
    --section-gap: 48px;
    --content-pad: 20px;
  }
  .content { padding: 68px 20px 40px; }

  /* Section headers */
  .section-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-header h1 { font-size: 1.25rem; }
  .section-badge { padding: 4px 10px; font-size: 0.62rem; }
  .section { scroll-margin-top: 68px; }

  /* Typography */
  h2 { font-size: 1.05rem; }
  h3 { font-size: 0.92rem; }
  p, li { font-size: 0.92rem; }

  /* Tables — horizontal scroll with visual hint */
  .table-wrap {
    margin-left: -8px;
    margin-right: -8px;
    border-radius: var(--radius-sm);
    position: relative;
  }
  .table-wrap::after {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0;
    width: 24px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8));
    pointer-events: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    opacity: 0.7;
  }
  table { font-size: 0.76rem; min-width: 420px; }
  th { padding: 10px 12px; font-size: 0.68rem; }
  td { padding: 9px 12px; }

  /* Diagrams */
  .diagram-container {
    padding: 16px 12px;
    margin: 16px -6px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
  }
  .diagram-title { font-size: 0.64rem; letter-spacing: 1px; }

  /* Callouts */
  .note, .related-party-box { padding: 14px 16px; font-size: 0.85rem; }
  .disclaimer-box { padding: 20px 18px; font-size: 0.84rem; }
  blockquote { padding: 10px 16px; font-size: 0.9rem; }

  /* Back to top — smaller on mobile */
  .back-to-top {
    width: 40px; height: 40px;
    bottom: 20px; right: 16px;
  }
  .back-to-top svg { width: 17px; height: 17px; }

  /* Footer */
  footer { margin-top: 48px; padding: 24px 0; font-size: 0.75rem; }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .sidebar, .back-to-top, .sidebar-toggle, #progress-bar, #sidebar-overlay { display: none !important; }
  .content { margin-left: 0 !important; padding: 24px !important; max-width: 100% !important; }
  .cover { min-height: auto; padding: 48px; page-break-after: always; background: #fff !important; }
  .cover h1 span { -webkit-text-fill-color: var(--navy); }
  .cover h1, .cover-sub, .cover-badge { color: var(--navy) !important; }
  .section { opacity: 1 !important; transform: none !important; }
  .section-header { page-break-after: avoid; }
  .diagram-container, .table-wrap { page-break-inside: avoid; }
  body { font-size: 11pt; }
  .cover-grid, .cover-glow, #particles-canvas, .cover-scroll-icon { display: none !important; }
}