:root{
    --ink:#12242b;
    --ink-soft:#4c6169;
    --line:#dde3e2;
    --surface:#ffffff;
    --bg:#f3f5f4;
    --accent:#0e6e73;
    --accent-dark:#0a4f53;
    --accent-tint:#e3f1f1;
    --warn:#c1502e;
    --warn-tint:#fbeae4;
    --good:#3d7a4f;
    --radius:10px;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;height:100%;}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    background:var(--bg);
    color:var(--ink);
    -webkit-tap-highlight-color:transparent;
    overscroll-behavior:none;
  }
  button{
    font-family:inherit;
    font-size:15px;
    border:1px solid var(--line);
    background:var(--surface);
    color:var(--ink);
    border-radius:var(--radius);
    padding:12px 14px;
    cursor:pointer;
    -webkit-user-select:none;
    user-select:none;
  }
  button:active{transform:scale(0.97);}
  button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;}
  button.ghost{background:transparent;border-color:transparent;color:var(--accent-dark);font-weight:600;padding:8px 6px;}
  button.danger{color:var(--warn);border-color:var(--warn);background:var(--warn-tint);}
  button.small{padding:8px 10px;font-size:13px;}
  input[type=text],input[type=number]{
    font-family:inherit;font-size:15px;padding:10px 12px;border:1px solid var(--line);
    border-radius:var(--radius);background:#fff;color:var(--ink);width:100%;
  }
  .app{max-width:900px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;}

  /* header */
  header{
    position:sticky;top:0;z-index:20;background:var(--surface);
    border-bottom:1px solid var(--line);padding:10px 16px;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  header .exp-info{display:flex;flex-direction:column;gap:1px;min-width:0;}
  header .exp-name{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  header .exp-sub{font-size:12px;color:var(--ink-soft);}
  .role-toggle{display:flex;background:var(--bg);border-radius:var(--radius);padding:3px;border:1px solid var(--line);flex-shrink:0;}
  .role-toggle button{border:none;background:transparent;padding:7px 12px;font-size:13px;font-weight:600;color:var(--ink-soft);border-radius:7px;}
  .role-toggle button.active{background:var(--accent);color:#fff;}

  main{flex:1;padding:16px;padding-bottom:60px;}
  .crumb{display:flex;align-items:center;gap:6px;margin-bottom:14px;flex-wrap:wrap;}
  .crumb button{padding:7px 10px;font-size:13px;}
  .crumb .sep{color:var(--ink-soft);font-size:13px;}
  .crumb .current{font-size:13px;color:var(--ink-soft);font-weight:600;}

  h2{font-size:15px;font-weight:600;margin:0 0 12px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.03em;}

  /* cabin grid */
  .cabin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:10px;}
  .cabin-btn{aspect-ratio:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-weight:700;font-size:18px;}
  .cabin-btn .n{font-size:11px;font-weight:500;color:var(--ink-soft);}
  .cabin-btn.variable{border-color:var(--accent);color:var(--accent-dark);}

  /* guest list */
  .guest-row{
    display:flex;align-items:center;gap:12px;padding:14px;width:100%;text-align:left;
    justify-content:flex-start;margin-bottom:8px;
  }
  .avatar{width:36px;height:36px;border-radius:50%;background:var(--accent-tint);color:var(--accent-dark);
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;}
  .guest-row .meta{display:flex;flex-direction:column;align-items:flex-start;flex:1;min-width:0;}
  .guest-row .name{font-weight:600;font-size:15px;}
  .guest-row .total{font-size:12px;color:var(--ink-soft);}
  .tag{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;padding:2px 7px;border-radius:20px;}
  .tag.empty{background:var(--bg);color:var(--ink-soft);}
  .add-guest-btn{border-style:dashed;color:var(--ink-soft);}

  /* guest tab */
  .tab-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px;}
  .tab-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
  .tab-head .name{font-weight:700;font-size:17px;}
  .tab-head .sub{font-size:12px;color:var(--ink-soft);}
  .item-row{display:flex;justify-content:space-between;align-items:center;padding:7px 0;font-size:14px;border-bottom:1px solid #f0f0ee;}
  .item-row:last-child{border-bottom:none;}
  .item-row .lbl{color:var(--ink);}
  .item-row .sub-lbl{font-size:11px;color:var(--ink-soft);}
  .item-row .amt{font-weight:600;font-variant-numeric:tabular-nums;}
  .item-row.void .amt{color:var(--warn);}
  .total-row{display:flex;justify-content:space-between;padding-top:12px;margin-top:8px;border-top:2px solid var(--ink);font-size:17px;font-weight:700;}
  .action-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:16px;}
  .action-grid button{padding:13px 10px;font-size:14px;}
  .action-grid.three{grid-template-columns:1fr 1fr 1fr;}
  .empty-note{color:var(--ink-soft);font-size:13px;padding:10px 0;}

  /* catalog */
  .cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;}
  .cat-tile{aspect-ratio:1.3;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
    font-weight:700;font-size:15px;text-align:center;padding:10px;}
  .cat-tile .n{font-size:11px;font-weight:500;color:var(--ink-soft);}
  .item-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;}
  .item-tile{aspect-ratio:1.1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
    text-align:center;padding:10px;}
  .item-tile .iname{font-size:14px;font-weight:600;line-height:1.25;}
  .item-tile .price{font-size:13px;color:var(--ink-soft);font-weight:600;font-variant-numeric:tabular-nums;}
  .item-tile .price.unset{color:var(--accent-dark);font-style:italic;}
  .qty-badge{position:absolute;top:6px;right:6px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;
    min-width:20px;height:20px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 5px;}
  .restriction-dot{position:absolute;top:6px;left:6px;background:var(--warn);color:#fff;font-size:11px;font-weight:700;
    width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;}
  .promo-tile{border-color:var(--accent); background:var(--accent-tint);}
  .promo-tile .price{color:var(--accent-dark); font-weight:700;}
  .catalog-footer{position:sticky;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);
    padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin:16px -16px -60px;
    font-size:13px;color:var(--ink-soft);}
  .catalog-footer strong{color:var(--ink);font-size:15px;}

  /* settlement */
  .settle-toggle{display:flex;align-items:center;justify-content:space-between;background:var(--accent-tint);
    border-radius:var(--radius);padding:12px 14px;margin-bottom:14px;font-size:14px;font-weight:600;color:var(--accent-dark);}
  .payment-row{display:flex;gap:10px;margin-top:14px;}
  .payment-row div{flex:1;}
  .payment-row label{font-size:12px;color:var(--ink-soft);display:block;margin-bottom:4px;font-weight:600;}
  .paid-note{font-size:12px;margin-top:8px;font-weight:600;}
  .paid-note.ok{color:var(--good);}
  .paid-note.bad{color:var(--warn);}

  footer.note{padding:20px 16px 40px;text-align:center;font-size:12px;color:var(--ink-soft);}

  @media print{
    header,.crumb,.action-grid,footer{display:none !important;}
    body{background:#fff;}
  }