:root{--background:#f4f1ec;--surface:#ffffff;--ink:#161616;--muted:#68625d;--line:#d8d2ca;--accent:#165d59;--accent-strong:#0f4542;--danger:#a33a31;--danger-strong:#7e2b24}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--background);color:var(--ink);font-family:Arial,Helvetica,sans-serif}button,input,select{font:inherit}.app-shell{max-width:1180px;margin:0 auto;padding:32px 24px 48px}.page-header{margin-bottom:24px}.header-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.page-header p{margin:0 0 6px;color:var(--muted);font-size:14px}.page-header h1{margin:0;font-size:32px;line-height:1.1}.header-nav{display:flex;align-items:center;gap:4px;margin-top:8px}.nav-link{display:inline-block;padding:6px 14px;font-size:14px;color:var(--muted);text-decoration:none;border:1px solid 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.registro-stamp strong{font-size:11px}.sender-info{margin-top:10px;font-size:12px;line-height:1.5}.sender-info p{margin:0}.sender-info strong{margin-right:4px}.auth-shell{max-width:1180px;margin:0 auto;padding:32px 24px 48px}.auth-workspace{display:grid;grid-template-columns:minmax(440px,1fr) minmax(340px,420px);grid-gap:24px;gap:24px;align-items:start}.auth-print-page{position:relative;padding:56px 52px 48px;min-height:566px;font-family:Arial,Helvetica,sans-serif;width:100%;max-width:480px}.auth-title{text-align:center;font-size:26px;font-weight:700;text-decoration:underline;margin:0 0 48px;letter-spacing:1px}.auth-body{font-size:14px;line-height:1.9;text-align:justify;margin:0 0 56px}.auth-date{text-align:right;font-size:13px;margin:0}.auth-signature-line{border-top:1px solid #000;width:70%;margin:0 0 20px}.auth-owner{font-size:13px;font-weight:700;line-height:1.8}.auth-owner p{margin:0}@media print{body *{visibility:hidden}.print-page-container,.print-page-container *{visibility:visible}.print-page-container{position:fixed;inset:0;padding:0;display:flex;justify-content:flex-start}.print-page{max-width:none;width:297mm;height:210mm;border:none}.print-blank-half{flex:0 0 40%}.print-label-half{flex:1 1}@page{size:A4 landscape;margin:0}}@media (max-width:900px){.auth-workspace,.workspace{grid-template-columns:1fr}.preview-panel{order:-1}}@media (max-width:560px){.app-shell,.auth-shell{padding:20px 16px 32px}.page-header h1{font-size:26px}.header-inner{flex-direction:column}.field-grid{grid-template-columns:1fr}.form-actions{flex-direction:column-reverse}.print-toolbar{flex-direction:column}}