:root {
    --blueprint: #1d4ed8;
    --soft: #93c5fd;
    --ink: #111827;
    --line: #bfdbfe;
    --panel: #f8fbff;
  }

  body {
    background: #f1f5f9;
  }

  .worksheet-wrap {
    max-width: 980px;
    margin: 0 auto;
    padding: 20px;
  }

  .worksheet-hero {
    background:
      linear-gradient(rgba(255,255,255,.90), rgba(255,255,255,.94)),
      linear-gradient(90deg, rgba(29,78,216,.08) 1px, transparent 1px),
      linear-gradient(rgba(29,78,216,.08) 1px, transparent 1px);
    background-size: auto, 26px 26px, 26px 26px;
    border: 2px solid var(--blueprint);
    border-radius: 14px;
    padding: 24px;
    margin: 20px 0;
    box-shadow: 0 12px 28px rgba(15,23,42,.10);
  }

  .kicker {
    color: var(--blueprint);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .84rem;
    margin-bottom: 8px;
  }

  .worksheet-hero h1 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.05;
  }

  .sub {
    margin-top: 12px;
    color: #1e3a8a;
    font-weight: 700;
  }

  .core {
    margin-top: 12px;
    padding: 12px 14px;
    border-left: 5px solid var(--blueprint);
    background: rgba(219,234,254,.62);
    color: #0f172a;
    line-height: 1.55;
  }

  .quick-note {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    margin: 18px 0;
    line-height: 1.65;
  }

  .quick-note strong {
    color: #1d4ed8;
  }

  .control-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    background: #111827;
    color: #e5e7eb;
    padding: 14px;
    border-radius: 12px;
    margin: 18px 0;
  }

  .control-panel button,
  .control-panel label {
    border: 1px solid #60a5fa;
    background: #0f172a;
    color: #e5e7eb;
    border-radius: 8px;
    padding: 10px 12px;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
  }

  .control-panel input {
    margin-right: 7px;
  }

  .footer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin: 24px 0;
  }

  .footer-actions a {
    display: inline-block;
    text-decoration: none;
    border: 1px solid #2563eb;
    background: #fff;
    color: #1d4ed8;
    border-radius: 10px;
    padding: 10px 14px;
    font-weight: 800;
  }

  .hidden {
    display: none;
  }

  .journal-heading {
    color: #1d4ed8;
    font-size: 1.65rem;
    font-weight: 800;
    margin: 0 0 4px;
  }

  .journal-subtitle {
    color: #1e3a8a;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
  }

  /* =====================================================
     COMPARTMENT JOURNAL
     ===================================================== */

  .compartment-registry {
    background: #fff;
    border: 2px solid #1d4ed8;
    border-radius: 14px;
    margin: 22px 0;
    padding: 22px;
    box-shadow: 0 10px 24px rgba(15,23,42,.08);
  }

  .compartment-registry > h2 {
    margin: 0;
    color: #0f172a;
    font-size: 1.55rem;
  }

  .compartment-registry > h3 {
    margin: 4px 0 10px;
    color: #1d4ed8;
    font-size: 1.05rem;
  }

  .registry-intro {
    line-height: 1.65;
    color: #334155;
    margin: 0 0 18px;
  }

  .compartment-list {
    display: grid;
    gap: 12px;
  }

  .compartment-card {
    background: #f8fbff;
    border: 1px solid #93c5fd;
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
    page-break-inside: avoid;
  }

  .compartment-head {
    display: flex;
    align-items: stretch;
    background: #f8fbff;
  }

  .compartment-toggle {
    display: flex;
    flex: 1;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    width: 100%;
    min-width: 0;
    border: 0;
    background: transparent;
    color: inherit;
    text-align: left;
    padding: 15px 16px;
    cursor: pointer;
    font: inherit;
  }

  .compartment-toggle:hover {
    background: #eff6ff;
  }

  .compartment-toggle:focus-visible {
    outline: 3px solid #60a5fa;
    outline-offset: -3px;
  }

  .compartment-title-wrap {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    min-width: 0;
  }

  .compartment-chevron {
    color: #1d4ed8;
    font-size: 1rem;
    font-weight: 900;
    line-height: 1.35;
    transition: transform .18s ease;
  }

  .compartment-card.is-open .compartment-chevron {
    transform: rotate(90deg);
  }

  .compartment-head h4 {
    margin: 0;
    color: #0f172a;
    font-size: 1.12rem;
  }

  .compartment-created {
    display: block;
    color: #64748b;
    font-size: .8rem;
    margin-top: 4px;
  }

  .compartment-summary {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    min-width: 0;
  }

  .entry-badge {
    white-space: nowrap;
    background: #eff6ff;
    color: #1d4ed8;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    padding: 5px 9px;
    font-size: .8rem;
    font-weight: 800;
  }

  .compartment-body {
    display: none;
    border-top: 1px solid #bfdbfe;
    padding: 14px 16px 16px;
  }

  .compartment-card.is-open .compartment-body {
    display: block;
  }

  .compartment-history {
    display: grid;
    gap: 10px;
    margin: 12px 0;
  }

  .interaction-entry {
    position: relative;
    background: #fff;
    border-left: 4px solid #2563eb;
    border-radius: 8px;
    padding: 12px 42px 12px 13px;
    box-shadow: 0 1px 3px rgba(15,23,42,.06);
  }

  .interaction-time {
    display: block;
    color: #1e3a8a;
    font-size: .8rem;
    font-weight: 800;
    margin-bottom: 6px;
  }

  .interaction-text {
    white-space: pre-wrap;
    color: #334155;
    line-height: 1.55;
  }

  .empty-history {
    color: #64748b;
    font-style: italic;
    border: 1px dashed #cbd5e1;
    background: #fff;
    border-radius: 8px;
    padding: 11px;
  }

  .delete-entry-btn,
  .delete-compartment-btn {
    border: 1px solid #cbd5e1;
    background: #fff;
    color: #64748b;
    border-radius: 7px;
    cursor: pointer;
    font-weight: 800;
  }

  .delete-entry-btn {
    position: absolute;
    right: 9px;
    top: 9px;
    padding: 4px 7px;
  }

  .delete-compartment-btn {
    align-self: center;
    flex: 0 0 auto;
    margin: 0 12px 0 8px;
    padding: 8px 12px;
  }

  .delete-entry-btn:hover,
  .delete-compartment-btn:hover {
    border-color: #dc2626;
    color: #b91c1c;
  }

  .entry-form {
    margin-top: 13px;
    padding-top: 13px;
    border-top: 1px dashed #93c5fd;
  }

  .entry-form > label,
  .add-compartment-box label {
    display: block;
    font-weight: 800;
    color: #1e3a8a;
    margin-bottom: 6px;
  }

  .entry-form textarea,
  .add-compartment-box input {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid #93c5fd;
    border-radius: 8px;
    background: #fff;
    color: #0f172a;
    font: inherit;
    padding: 10px;
  }

  .entry-form textarea {
    min-height: 86px;
    resize: vertical;
    line-height: 1.45;
  }

  .observation-tip {
    margin: 0 0 10px;
    font-size: .82rem;
    color: #64748b;
    font-style: italic;
    line-height: 1.45;
  }

  .observation-source {
    margin: 12px 0;
  }

  .source-title {
    display: block;
    font-weight: 800;
    color: #1e3a8a;
    margin-bottom: 8px;
  }

  .source-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 7px 12px;
    margin-bottom: 12px;
  }

  .source-grid label {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0;
    color: #334155;
    font-weight: 600;
    cursor: pointer;
  }

  .source-grid input {
    margin: 0;
    accent-color: #1d4ed8;
  }

  .interaction-source {
    display: inline-block;
    margin: 0 0 7px;
    padding: 3px 8px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: .76rem;
    font-weight: 800;
  }

  .entry-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 9px;
  }

  .registry-btn {
    background: #1e3a8a;
    color: #fff;
    border: 0;
    border-radius: 8px;
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 800;
    margin-bottom: 20px;
  }

  .registry-btn:hover {
    background: #172554;
  }

  .add-compartment-box {
    margin-top: 20px;
    background:
      linear-gradient(rgba(248,251,255,.96), rgba(248,251,255,.96)),
      linear-gradient(90deg, rgba(29,78,216,.07) 1px, transparent 1px),
      linear-gradient(rgba(29,78,216,.07) 1px, transparent 1px);
    background-size: auto, 24px 24px, 24px 24px;
    border: 2px dashed #2563eb;
    border-radius: 12px;
    padding: 18px;
  }

  .add-compartment-box h4 {
    margin: 0 0 5px;
    color: #0f172a;
    text-transform: uppercase;
    letter-spacing: .04em;
  }

  .add-compartment-box p {
    margin: 0 0 12px;
    color: #64748b;
    line-height: 1.5;
  }

  .registry-empty {
    padding: 16px;
    border: 1px dashed #94a3b8;
    border-radius: 9px;
    background: #f8fafc;
    color: #64748b;
    font-style: italic;
  }

  /* =====================================================
     PHONE LAYOUT
     ===================================================== */

  @media (max-width: 600px) {
    .worksheet-wrap {
      padding: 10px;
    }

    .compartment-registry {
      padding: 12px;
    }

    .compartment-head {
      display: block;
    }

    .compartment-toggle {
      display: block;
      width: 100%;
      min-width: 0;
      padding: 14px 16px 10px;
    }

    .compartment-title-wrap {
      display: block;
      margin-bottom: 8px;
    }

    .compartment-chevron {
      display: inline-block;
      margin-right: 8px;
    }

    .compartment-summary {
      display: block;
      margin: 8px 0 14px 28px;
    }

    .entry-badge {
      display: inline-block;
      white-space: normal;
      line-height: 1.3;
    }

    .delete-compartment-btn {
      display: block;
      width: calc(100% - 32px);
      margin: 14px auto 0;
      box-sizing: border-box;
      padding: 12px;
      background: #b91c1c;
      color: #fff;
      border: none;
      border-radius: 10px;
      font-weight: 700;
      text-align: center;
      cursor: pointer;
    }

    .delete-compartment-btn:hover,
    .delete-compartment-btn:focus-visible {
      background: #991b1b;
      color: #fff;
    }

    .source-grid {
      grid-template-columns: 1fr;
    }
  }

  /* =====================================================
     PRINT LAYOUT
     ===================================================== */

  @media print {
    @page {
      margin: .45in;
    }

    body {
      background: #fff !important;
      color: #000 !important;
      font-size: 9.5pt;
      line-height: 1.22;
    }

    .lab-header,
    .breadcrumbs,
    .hamburger,
    .side-menu,
    .control-panel,
    .footer-actions,
    .lab-footer,
    .quick-note,
    .entry-form,
    .add-compartment-box,
    .delete-entry-btn,
    .delete-compartment-btn {
      display: none !important;
    }

    .worksheet-wrap {
      max-width: none !important;
      padding: 0 !important;
      margin: 0 !important;
    }

    .worksheet-hero {
      margin: 0 0 8px !important;
      padding: 8px 10px !important;
      border: 1px solid #000 !important;
      border-radius: 0 !important;
      background: #fff !important;
      box-shadow: none !important;
    }

    .worksheet-hero .kicker,
    .worksheet-hero .sub,
    .worksheet-hero .core {
      display: none !important;
    }

    .worksheet-hero h1 {
      margin: 0 !important;
      font-size: 15pt !important;
      line-height: 1.1 !important;
    }

    .compartment-registry {
      margin: 0 !important;
      padding: 0 !important;
      border: 0 !important;
      border-radius: 0 !important;
      background: #fff !important;
      box-shadow: none !important;
    }

    .compartment-registry > h2 {
      display: none !important;
    }

    .compartment-registry > h3 {
      margin: 0 0 5px !important;
      font-size: 10pt !important;
      color: #000 !important;
    }

    .registry-intro {
      display: none !important;
    }

    .compartment-list {
      display: block !important;
    }

    .compartment-card {
      margin: 0 0 8px !important;
      padding: 7px 8px !important;
      border: 1px solid #777 !important;
      border-radius: 0 !important;
      background: #fff !important;
      box-shadow: none !important;
      page-break-inside: auto !important;
      break-inside: auto !important;
    }

    .compartment-head {
      display: flex !important;
      align-items: baseline !important;
      padding: 0 0 4px !important;
      margin: 0 0 4px !important;
      border-bottom: 1px solid #999 !important;
    }

    .compartment-head h4 {
      font-size: 11pt !important;
      line-height: 1.1 !important;
    }

    .compartment-created {
      display: inline !important;
      margin: 0 0 0 8px !important;
      font-size: 7.8pt !important;
      color: #333 !important;
    }

    .entry-badge {
      padding: 1px 5px !important;
      border: 1px solid #999 !important;
      border-radius: 0 !important;
      background: #fff !important;
      color: #000 !important;
      font-size: 7.5pt !important;
    }

    .compartment-body {
      display: block !important;
      border-top: 0 !important;
      padding: 0 !important;
    }

    .compartment-toggle {
      display: flex !important;
      padding: 0 !important;
      cursor: default !important;
    }

    .compartment-chevron {
      display: none !important;
    }

    .compartment-summary {
      display: flex !important;
      margin-left: auto !important;
    }

    .compartment-history {
      display: block !important;
      margin: 0 !important;
    }

    .interaction-entry {
      margin: 0 !important;
      padding: 4px 5px !important;
      border: 0 !important;
      border-bottom: 1px solid #ccc !important;
      border-radius: 0 !important;
      background: #fff !important;
      box-shadow: none !important;
      page-break-inside: avoid !important;
      break-inside: avoid !important;
    }

    .interaction-entry:last-child {
      border-bottom: 0 !important;
    }

    .interaction-time {
      display: inline !important;
      margin: 0 6px 0 0 !important;
      font-size: 7.6pt !important;
      line-height: 1.1 !important;
      color: #000 !important;
    }

    .interaction-source {
      display: inline-block !important;
      margin: 0 6px 0 0 !important;
      padding: 0 3px !important;
      border: 1px solid #999 !important;
      border-radius: 0 !important;
      background: #fff !important;
      color: #000 !important;
      font-size: 7.4pt !important;
      line-height: 1.1 !important;
    }

    .interaction-text {
      display: inline !important;
      color: #000 !important;
      font-size: 9pt !important;
      line-height: 1.2 !important;
      white-space: pre-wrap !important;
    }

    .empty-history {
      margin: 0 !important;
      padding: 3px 4px !important;
      border: 0 !important;
      background: #fff !important;
      color: #444 !important;
      font-size: 8pt !important;
    }

    a {
      color: #111827;
      text-decoration: none;
    }
  }