:root{
  --border:#111;--soft:#f8edc9;--bg:#f5f6f8;--card:#fff;--muted:#64748b;
  --ok:#1f9d3a;--bad:#db1f2a;--blue:#1f78d1;--green:#16803a;--red:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font-family:Arial,Helvetica,sans-serif;color:#111}
label{font-size:12px;font-weight:700;color:#334155;display:block;margin-bottom:5px}
select,input,textarea,button{font:inherit}
select,input{width:100%;min-height:44px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;padding:8px 10px;font-size:16px}
button{min-height:44px;border:0;border-radius:10px;padding:10px 12px;font-weight:700;cursor:pointer}
.btn-primary{background:#111;color:#fff}.btn-secondary{background:#e2e8f0}.btn-danger{background:#fee2e2;color:#991b1b}.btn-green{background:#dcfce7;color:#166534}
button:disabled{opacity:.55;cursor:not-allowed}

/* Login / registro */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.auth-card{max-width:380px;width:100%;background:var(--card);padding:26px;border-radius:14px;box-shadow:0 4px 18px rgba(0,0,0,.1)}
.auth-card h1{font-size:20px;margin:0 0 4px}
.auth-card p.sub{color:var(--muted);font-size:13px;margin:0 0 18px}
.auth-field{margin-bottom:14px}
.auth-error{background:#fee2e2;color:#991b1b;padding:8px 10px;border-radius:8px;font-size:13px;margin-bottom:12px;display:none}
.auth-switch{margin-top:16px;font-size:13px;text-align:center;color:var(--muted)}
.auth-switch a{color:#111;font-weight:700;cursor:pointer;text-decoration:underline}

/* App shell */
.topbar{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid #d7dce2;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.topbar .brand{font-weight:800}
.topbar .who{font-size:13px;color:var(--muted)}
.tabs{display:flex;gap:8px;padding:10px 16px 0;max-width:1280px;margin:0 auto}
.tab-btn{background:#e2e8f0;color:#334155}
.tab-btn.active{background:#111;color:#fff}
.panel{display:none}
.panel.active{display:block}

.toolbar{position:sticky;top:53px;z-index:10;background:#fff;border-bottom:1px solid #d7dce2;padding:12px;box-shadow:0 2px 12px rgba(0,0,0,.08)}
.toolbar-grid{display:grid;grid-template-columns:1.4fr 1.1fr 1fr .9fr .9fr;gap:10px;align-items:end;max-width:1280px;margin:0 auto}
.page-wrap{padding:14px}.sheet{max-width:1180px;margin:0 auto;background:var(--card);padding:12px;border-radius:14px;box-shadow:0 4px 18px rgba(0,0,0,.08)}
.meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:10px}
#expediente{color:var(--red);font-weight:800}
.checklist{border:1.5px solid var(--border);background:#fff}
.head{display:grid;grid-template-columns:1fr 290px;border-bottom:1.5px solid var(--border)}
.title{background:var(--soft);display:flex;align-items:center;justify-content:center;text-align:center;font-size:18px;letter-spacing:.3px;padding:18px 10px;font-weight:700}
.subheader{display:grid;grid-template-columns:1fr 1fr;gap:8px;border-bottom:1px solid var(--border);padding:8px 10px;font-size:12px;background:#fafafa}
.badge{font-weight:800;text-transform:uppercase}.legend{display:grid;grid-template-columns:repeat(3,1fr);align-items:center;text-align:center;padding:5px 8px;gap:8px}
.legend .icon{font-size:44px;line-height:38px;font-weight:700}.legend .small{font-size:9px;line-height:1.1}.legend .ok{color:var(--ok)}.legend .bad{color:var(--bad)}
.row{display:grid;grid-template-columns:44px 1fr 290px;border-bottom:1px solid var(--border);min-height:58px;break-inside:avoid;page-break-inside:avoid}.row:last-child{border-bottom:0}
.num{display:flex;align-items:center;justify-content:center;border-right:1px solid var(--border);font-size:12px;color:#333}.txt{padding:6px 10px;line-height:1.2}.line-es{font-size:13px;color:#111}.line-alt{font-size:12px;margin-top:2px}.line-en{color:var(--green)}.line-de{color:var(--blue)}.line-fr{color:#0f766e}.line-el{color:#7c3aed}.line-sv{color:#b45309}
.checks{display:grid;grid-template-columns:repeat(3,1fr);align-items:center;text-align:center;border-left:1px solid var(--border)}
.box{width:28px;height:28px;border:2px solid #111;display:inline-flex;align-items:center;justify-content:center;margin:auto;background:#fff;border-radius:2px;cursor:pointer;font-size:22px;font-weight:800;line-height:1;user-select:none}.box.checked.ok{color:var(--ok)}.box.checked.na{color:#555}.box.checked.bad{color:var(--bad)}
.box.readonly{cursor:default}
.section-title{margin:14px 0 8px;background:#111;color:#fff;text-align:center;padding:9px;font-size:14px;letter-spacing:.2px}.obs{width:100%;min-height:92px;border:1px solid #cbd5e1;border-radius:10px;padding:10px;resize:vertical;background:#fff;font-size:16px}
.signature-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}.sig-card{border:1px solid #cbd5e1;border-radius:12px;padding:10px;background:#fff}.sig-title{font-weight:700;margin-bottom:6px}.sig-pad{width:100%;height:190px;border:1.5px dashed #64748b;border-radius:10px;background:#fff;touch-action:none;display:block}.sig-actions{display:flex;gap:8px;margin-top:8px}.hint{font-size:12px;color:var(--muted);margin-top:6px}.status{max-width:1280px;margin:8px auto 0;color:#475569;font-size:13px}.status strong{color:#111}.folder{color:#166534;font-weight:700}
.sig-img{width:100%;height:190px;object-fit:contain;border:1.5px solid #cbd5e1;border-radius:10px;background:#fff}

/* Historial */
.hist-toolbar{max-width:1280px;margin:0 auto;padding:14px;display:grid;grid-template-columns:1fr 1fr 1fr 1fr 1fr auto;gap:10px;align-items:end}
.hist-wrap{max-width:1280px;margin:0 auto;padding:0 14px 24px}
table.hist-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 18px rgba(0,0,0,.08)}
table.hist-table th,table.hist-table td{padding:10px 12px;text-align:left;border-bottom:1px solid #e2e8f0;font-size:13px}
table.hist-table th{background:#f1f5f9;font-weight:800}
table.hist-table tr:hover{background:#f8fafc;cursor:pointer}
.empty-state{padding:30px;text-align:center;color:var(--muted)}

.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:20px;z-index:50}
.modal-card{background:#fff;border-radius:14px;max-width:1180px;width:100%;padding:14px}
.modal-close-row{display:flex;justify-content:flex-end;gap:8px;margin-bottom:10px}

.pdf-export .no-print,.pdf-export .subheader{display:none!important}
@media (max-width:980px){
  .toolbar-grid{grid-template-columns:1fr 1fr}.meta{grid-template-columns:1fr 1fr}.head{grid-template-columns:1fr}
  .legend{border-top:1px solid var(--border)}.row{grid-template-columns:34px 1fr}
  .checks{grid-column:1/3;border-left:0;border-top:1px solid #ddd;padding:8px 0}
  .signature-grid{grid-template-columns:1fr}.sheet{padding:8px}.title{font-size:16px}.toolbar{position:static}
  .hist-toolbar{grid-template-columns:1fr 1fr}
}
@media print{
  body{background:#fff}.toolbar,.status,.no-print,.topbar,.tabs{display:none!important}
  .page-wrap{padding:0}.sheet{max-width:none;box-shadow:none;border-radius:0;padding:0}
  .box{width:18px;height:18px;font-size:15px}.sig-pad,.sig-img{height:130px}.row{break-inside:avoid}
  .line-es{font-size:9.6px}.line-alt{font-size:9px}.title{font-size:13px}.head{grid-template-columns:1fr 200px}
  .row{grid-template-columns:30px 1fr 200px;min-height:38px}.legend .icon{font-size:30px}.legend .small{font-size:7px}
  .section-title{font-size:10px;padding:6px}.meta input,.meta select{border:0;border-bottom:1px solid #999;border-radius:0;min-height:24px;font-size:10px}
  .obs{font-size:10px;min-height:55px}.subheader{font-size:9px}
}