:root{--bg:#f6f7f9;--surface:#fff;--ink:#111827;--muted:#5b6472;--border:#e4e7ec;--border-strong:#d0d5dd;--navy:#0f2a52;--blue:#1a4fb4;--blue-dark:#0f356f;--blue-tint:#eef3fb;--danger:#c0392b;--danger-tint:#fbeceb;--success:#1a9e6c;--success-tint:#eafaf3;--radius:14px;--max:880px}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,sans-serif}h1,h2,h3{color:var(--navy);font-family:"Source Serif 4",Georgia,serif;font-weight:600}.firma-page{flex-direction:column;min-height:100vh;display:flex}.firma-topbar{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);background:#ffffffeb;position:sticky;top:0}.firma-topbar-inner{justify-content:space-between;align-items:center;width:min(100% - 32px,1180px);margin:0 auto;padding:14px 0;display:flex}.firma-topbar-brand{align-items:center;gap:12px;text-decoration:none;display:flex}.firma-topbar-brand img{height:60px;display:block}.firma-topbar-back{color:var(--muted);align-items:center;gap:6px;font-size:.88rem;font-weight:500;text-decoration:none;display:inline-flex}.firma-topbar-back:hover{color:var(--ink)}.firma-intro{background:var(--surface);border-bottom:1px solid var(--border);padding:44px 0 40px}.firma-intro-inner{width:min(100% - 32px, var(--max));margin:0 auto}.firma-kicker{color:var(--blue);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:8px;margin-bottom:14px;font-family:IBM Plex Mono,monospace;font-size:.8rem;font-weight:600;display:inline-flex}.firma-kicker:before{content:"";background:var(--blue);width:20px;height:2px;display:inline-block}.firma-intro h1{margin:0 0 10px;font-size:clamp(1.8rem,3.4vw,2.4rem)}.firma-intro p{color:var(--muted);max-width:620px;margin:0;font-size:1rem;line-height:1.7}.firma-content{flex:1;padding:40px 0 64px}.firma-content-inner{width:min(100% - 32px, var(--max));margin:0 auto}.firma-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:0 1px 3px #1018280a,0 8px 24px #1018280d}.firma-progreso{flex-wrap:wrap;gap:8px;margin-bottom:30px;display:flex}.firma-progreso-item{color:var(--muted);opacity:.55;align-items:center;gap:7px;font-size:.78rem;font-weight:500;display:flex}.firma-progreso-item.activo{opacity:1;color:var(--ink)}.firma-progreso-dot{background:var(--blue-tint);border:1px solid var(--border);width:22px;height:22px;color:var(--muted);border-radius:50%;place-items:center;font-family:IBM Plex Mono,monospace;font-size:.7rem;display:grid}.firma-progreso-item.activo .firma-progreso-dot{background:var(--blue);border-color:var(--blue);color:#fff}.firma-body h2{margin:0 0 18px;font-size:1.2rem}.firma-subtitulo{color:var(--muted);margin-top:22px;margin-bottom:12px;font-size:.9rem;font-weight:600}.firma-opciones{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.firma-opcion{text-align:left;background:var(--surface);border:1px solid var(--border);color:var(--ink);cursor:pointer;border-radius:10px;flex-direction:column;gap:6px;padding:16px;font-family:Inter,sans-serif;transition:all .15s;display:flex}.firma-opcion:hover{border-color:var(--blue)}.firma-opcion.seleccionada{border-color:var(--blue);background:var(--blue-tint)}.firma-opcion strong{font-size:.94rem}.firma-opcion span{color:var(--muted);font-size:.82rem}.firma-grid-vigencia{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;display:grid}.firma-chip{background:var(--surface);border:1px solid var(--border);color:var(--ink);cursor:pointer;border-radius:10px;flex-direction:column;gap:4px;padding:10px 12px;font-family:Inter,sans-serif;font-size:.85rem;display:flex}.firma-chip span{color:var(--muted);font-family:IBM Plex Mono,monospace;font-size:.72rem}.firma-chip.seleccionada{border-color:var(--blue);background:var(--blue-tint)}.firma-form-grid{grid-template-columns:repeat(2,1fr);gap:14px;display:grid}.campo{flex-direction:column;gap:6px;margin-bottom:12px;display:flex}.campo label{color:var(--muted);font-size:.82rem;font-weight:500}.campo input,.campo select,.campo textarea{background:var(--surface);border:1px solid var(--border-strong);color:var(--ink);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:.92rem}.campo input:focus,.campo select:focus,.campo textarea:focus{outline:2px solid var(--blue);outline-offset:1px;border-color:var(--blue)}.firma-aviso{color:#8a6300;background:#fff8e6;border:1px solid #f5dea0;border-radius:10px;margin-top:12px;padding:12px 14px;font-size:.85rem}.firma-archivos-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;display:grid}.firma-archivo{text-align:center;border:1px dashed var(--border-strong);background:var(--bg);cursor:pointer;color:var(--muted);border-radius:10px;flex-direction:column;align-items:center;gap:6px;padding:18px 12px;display:flex}.firma-archivo span{color:var(--ink);font-size:.85rem;font-weight:600}.firma-archivo small{word-break:break-all;font-size:.72rem}.firma-archivo.cargado{border-style:solid;border-color:var(--success);background:var(--success-tint)}.firma-hint{color:var(--muted);margin-top:14px;font-size:.8rem}.firma-revision{gap:10px;display:grid}.firma-resumen-item{background:var(--bg);border:1px solid var(--border);border-radius:8px;justify-content:space-between;padding:10px 14px;font-size:.85rem;display:flex}.firma-resumen-item span{color:var(--muted)}.firma-errores{flex-direction:column;gap:8px;margin-top:16px;display:flex}.firma-error-item{background:var(--danger-tint);color:var(--danger);border-radius:8px;align-items:center;gap:8px;padding:10px 12px;font-size:.85rem;display:flex}.firma-footer{border-top:1px solid var(--border);justify-content:space-between;margin-top:28px;padding-top:20px;display:flex}.btn{cursor:pointer;border:1px solid #0000;border-radius:8px;align-items:center;gap:8px;padding:12px 20px;font-size:.9rem;font-weight:600;text-decoration:none;transition:all .15s;display:inline-flex}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark)}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.btn-secondary{background:var(--surface);border-color:var(--border-strong);color:var(--ink)}.btn-secondary:hover{border-color:var(--blue);color:var(--blue)}.btn-secondary:disabled{opacity:.4;cursor:not-allowed}.firma-exito{text-align:center}.firma-exito-icono{color:var(--success);margin-bottom:12px}.firma-codigo{background:var(--bg);border:1px solid var(--border);border-radius:10px;margin:20px 0;padding:16px}.firma-codigo span{color:var(--muted);margin-bottom:6px;font-size:.8rem;display:block}.firma-codigo strong{letter-spacing:.02em;color:var(--ink);font-family:IBM Plex Mono,monospace;font-size:1.1rem}.firma-pago{background:var(--blue-tint);border:1px solid #cfe0f7;border-radius:10px;flex-direction:column;gap:6px;margin:0 0 20px;padding:16px;display:flex}.firma-pago span{color:var(--muted);margin-bottom:4px;font-size:.8rem}.firma-pago strong{color:var(--blue-dark);font-size:.95rem}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.firma-page-footer{background:var(--surface);border-top:1px solid var(--border);color:var(--muted);text-align:center;padding:24px 0;font-size:.82rem}@media (width<=640px){.firma-opciones,.firma-form-grid{grid-template-columns:1fr}.firma-card{padding:22px}.firma-topbar-brand img{height:44px}.firma-footer{flex-direction:column-reverse;gap:12px}.firma-footer .btn{justify-content:center;width:100%}}