:root {
    --navy: #0f2942;
    --navy-light: #1c3f5f;
    --gold: #b8892f;
    --gold-light: #d9a94a;
    --bg: #f4f6f8;
    --card-bg: #ffffff;
    --text: #1e2a35;
    --text-muted: #5c6b78;
    --border: #dde3e8;
    --success: #2f7a4f;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    font-family: "Sarabun", "Noto Sans Thai", "TH Sarabun New", -apple-system, "Segoe UI", Tahoma, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
  }

  .sheet {
    max-width: 960px;
    margin: 0 auto;
    padding: clamp(1rem, 3vw, 2.5rem);
  }

  /* ---------- Header ---------- */
  .doc-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    background: var(--navy);
    color: #fff;
    padding: clamp(1.25rem, 3vw, 2.25rem);
    border-radius: 14px;
  }

  .brand .company-name {
    font-size: clamp(1.15rem, 2.2vw, 1.5rem);
    font-weight: 700;
    letter-spacing: 0.02em;
  }

  .brand .company-sub {
    color: #b9c6d1;
    font-size: 0.9rem;
    margin-top: 0.25rem;
  }

  .doc-title {
    text-align: right;
  }

  .doc-title h1 {
    margin: 0;
    font-size: clamp(1.3rem, 2.6vw, 1.9rem);
    color: var(--gold-light);
  }

  .doc-title .doc-meta {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #d7dee4;
  }

  .doc-meta div { margin-top: 0.15rem; }

  /* ---------- Info blocks ---------- */
  .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .info-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
  }

  .info-box h3 {
    margin: 0 0 0.4rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gold);
  }

  .info-box p {
    margin: 0.15rem 0;
    font-size: 0.95rem;
  }

  .info-box .placeholder {
    color: var(--text-muted);
    font-style: italic;
  }

  /* ---------- Scope ---------- */
  .scope-note {
    margin-top: 1.5rem;
    background: #eef3f7;
    border-left: 4px solid var(--navy);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    font-size: 0.95rem;
  }

  /* ---------- Section titles ---------- */
  .section-title {
    margin: 2.25rem 0 1rem;
    font-size: 1.15rem;
    color: var(--navy);
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }

  .section-title::before {
    content: "";
    width: 6px;
    height: 1.2rem;
    background: var(--gold);
    border-radius: 3px;
    display: inline-block;
  }

  /* ---------- Package cards ---------- */
  .packages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.1rem;
  }

  .package-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 1px 2px rgba(15, 41, 66, 0.05);
  }

  .package-card .badge {
    position: absolute;
    top: -12px;
    left: 1.4rem;
    background: var(--navy);
    color: var(--gold-light);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
  }

  .package-card h3 {
    margin: 0.6rem 0 0.15rem;
    font-size: 1.05rem;
    color: var(--navy);
  }

  .package-card .phase-en {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
  }

  .package-card .price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--success);
    margin-bottom: 0.9rem;
  }

  .package-card .price span {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-muted);
  }

  .package-card ul {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0;
    flex-grow: 1;
  }

  .package-card ul li {
    position: relative;
    padding-left: 1.4rem;
    margin-bottom: 0.45rem;
    font-size: 0.92rem;
  }

  .package-card ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
  }

  .package-card .fit {
    background: #f7f4ea;
    border: 1px dashed #d9c98a;
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
    color: #6b5a24;
  }

  .package-card .fit strong { color: #4d3f16; }

  /* ---------- Summary table ---------- */
  .summary-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    font-size: 0.92rem;
  }

  .summary-table th, .summary-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
  }

  .summary-table thead th {
    background: var(--navy);
    color: #fff;
    font-weight: 600;
  }

  .summary-table td.price-col, .summary-table th.price-col {
    text-align: right;
  }

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

  .summary-table tfoot td {
    font-weight: 700;
    background: #eef3f7;
    color: var(--navy);
    border-top: 2px solid var(--navy);
  }

  .table-scroll {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 10px;
  }

  .table-scroll .summary-table {
    border-radius: 0;
  }

  /* ---------- Cost breakdown (details/accordion) ---------- */
  .method-note {
    background: #f1f5f8;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.9rem 1.1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
  }

  .breakdown {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
  }

  .breakdown summary {
    cursor: pointer;
    list-style: none;
    padding: 0.9rem 1.25rem;
    font-weight: 600;
    color: var(--navy);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    background: #f7f9fb;
  }

  .breakdown summary::-webkit-details-marker { display: none; }

  .breakdown summary::after {
    content: "▾";
    color: var(--gold);
    margin-left: auto;
    transition: transform 0.15s ease;
  }

  .breakdown[open] summary::after { transform: rotate(180deg); }

  .breakdown summary .range {
    font-weight: 400;
    color: var(--success);
    font-size: 0.9rem;
  }

  .breakdown .table-scroll {
    border: none;
    border-top: 1px solid var(--border);
    border-radius: 0;
  }

  .breakdown-table tr.dev-header td {
    font-weight: 700;
    background: #f7f9fb;
  }

  .breakdown-table tr.sub-row td:first-child {
    padding-left: 2rem;
    color: var(--text-muted);
  }

  .breakdown-table tr.sub-row td {
    font-size: 0.88rem;
  }

  .activity-total-table td.price-col,
  .activity-total-table th.price-col { white-space: nowrap; }

  /* ---------- Notes / recommendation ---------- */
  .callout {
    border-radius: 10px;
    padding: 1.1rem 1.3rem;
    font-size: 0.92rem;
  }

  .callout.notes {
    background: #fbf3e9;
    border: 1px solid #eccf9c;
  }

  .callout.recommend {
    background: #eaf3ee;
    border: 1px solid #b9dcc6;
    margin-top: 1.1rem;
  }

  .callout h4 {
    margin: 0 0 0.6rem;
    color: var(--navy);
  }

  .callout ul {
    margin: 0;
    padding-left: 1.2rem;
  }

  .callout li { margin-bottom: 0.35rem; }

  /* ---------- Signature ---------- */
  .signatures {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2.5rem;
  }

  .sig-box {
    text-align: center;
    padding-top: 2.5rem;
    border-top: 1px solid var(--text-muted);
    font-size: 0.9rem;
    color: var(--text-muted);
  }

  .sig-box strong {
    display: block;
    color: var(--text);
    margin-bottom: 0.2rem;
  }

  .validity {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
  }

  /* ---------- Print button ---------- */
  .print-bar {
    display: flex;
    justify-content: flex-end;
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem clamp(1rem, 3vw, 2.5rem) 0;
  }

  .print-btn {
    background: var(--gold);
    color: #fff;
    border: none;
    padding: 0.6rem 1.3rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
  }

  .print-btn:hover { background: var(--gold-light); }

  footer.page-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.78rem;
    margin-top: 2rem;
    padding-bottom: 2rem;
  }

  /* ---------- Responsive tweaks ---------- */
  @media (max-width: 640px) {
    .doc-header { flex-direction: column; }
    .doc-title { text-align: left; }
  }

  /* ---------- Print styles ---------- */
  @media print {
    body { background: #fff; }
    .print-bar { display: none; }
    .sheet { max-width: 100%; padding: 0.5cm; }
    .package-card, .info-box, .table-scroll { break-inside: avoid; }
    .doc-header { background: var(--navy) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  }