*{box-sizing:border-box}
:root{
    --primary:#0f766e;
    --primary-2:#14b8a6;
    --dark:#0f172a;
    --muted:#64748b;
    --bg:#f1f5f9;
    --card:#ffffff;
    --border:#e2e8f0;
}
html,body{margin:0;padding:0}
body{font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#f8fafc 0,#eef6f5 100%);color:#1e293b}
.site-header{height:76px;padding:12px 28px;background:#0f172a;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:0 8px 30px rgba(15,23,42,.12)}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,#0f766e,#14b8a6);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:23px}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.04em}
.brand-sub{font-size:12px;color:#cbd5e1;margin-top:2px}
.admin-link{color:#e2e8f0;text-decoration:none;border:1px solid rgba(255,255,255,.2);padding:9px 13px;border-radius:10px;font-size:13px}
.page-wrap{max-width:1320px;margin:0 auto;padding:30px 20px 50px}
.hero{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:26px 28px;margin-bottom:20px;border-radius:22px;background:linear-gradient(135deg,#0f172a,#155e59);color:#fff;box-shadow:0 18px 45px rgba(15,23,42,.16)}
.eyebrow{font-size:11px;letter-spacing:.16em;color:#99f6e4;font-weight:800}
.hero h1{margin:7px 0 6px;font-size:31px}
.hero p{margin:0;color:#dbeafe;max-width:700px}
.hero-badge{padding:10px 14px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.2);font-size:12px;font-weight:700;white-space:nowrap}
.grid-main{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:0 8px 30px rgba(15,23,42,.05);padding:24px}
.card-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:22px}
.number{width:38px;height:38px;border-radius:12px;background:#ccfbf1;color:#0f766e;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px;flex:0 0 auto}
.card-head h2{margin:1px 0 4px;font-size:19px;color:#0f172a}
.card-head p{margin:0;color:var(--muted);font-size:13px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field-full{grid-column:1/-1}
.field label{display:block;margin-bottom:7px;font-size:13px;font-weight:700;color:#475569}
.field input,.field select{width:100%;height:46px;padding:0 13px;border:1px solid #cbd5e1;border-radius:11px;background:#fff;font-size:14px;outline:none;transition:.18s}
.field input:focus,.field select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(15,118,110,.09)}
.input-suffix{position:relative}.input-suffix input{padding-right:45px}.input-suffix span{position:absolute;right:13px;top:14px;color:#64748b;font-size:14px;font-weight:700}.money-input input{padding-left:30px;padding-right:13px}.money-prefix{left:13px;right:auto!important;color:#475569!important}
.signature-card{display:flex;flex-direction:column}
.signature-box{position:relative;height:320px;border:2px dashed #99f6e4;border-radius:16px;overflow:hidden;background:#fff}
#canvasFirma{display:block;width:100%;height:320px;touch-action:none;cursor:crosshair}
.signature-guide{position:absolute;bottom:36px;left:25%;right:25%;border-bottom:1px solid #cbd5e1;text-align:center;color:#94a3b8;padding-bottom:6px;pointer-events:none}
.signature-tools{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-top:12px;color:#64748b;font-size:12px}
.btn-light{border:1px solid var(--border);background:#f8fafc;color:#334155;border-radius:10px;padding:9px 12px;cursor:pointer;font-weight:700}
.btn-primary{border:0;background:linear-gradient(135deg,#0f766e,#0d9488);color:#fff;border-radius:11px;padding:12px 18px;font-size:14px;font-weight:800;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;transition:.18s}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(15,118,110,.22)}
.btn-large{width:100%;margin-top:18px;height:50px}
.btn-large:disabled{opacity:.7;cursor:wait;transform:none;box-shadow:none}
.security-note{margin-top:15px;background:#f0fdfa;border:1px solid #ccfbf1;color:#115e59;border-radius:11px;padding:10px 12px;font-size:12px;display:flex;gap:8px}
.preview-card{margin-top:20px}
.letter-preview{max-width:850px;margin:0 auto;border:1px solid #d7d7d7;background:#fff;min-height:760px;padding:62px 78px;box-shadow:0 12px 36px rgba(15,23,42,.06);font-family:Arial,Helvetica,sans-serif;color:#111827}
.letter-date{font-size:14px;margin-bottom:39px}
.letter-address{display:flex;flex-direction:column;gap:4px;margin-bottom:37px;font-size:14px;line-height:1.25}.letter-address strong{margin-bottom:5px}
.letter-greeting{font-size:14px;font-weight:700;margin-bottom:33px}
.letter-preview p{font-size:14px;line-height:1.85;margin:0 0 21px;text-align:justify}.letter-atentamente{text-align:left!important}
.preview-signature{height:85px;width:260px;display:flex;align-items:end;justify-content:center;color:#94a3b8;font-size:11px;margin:18px 0 5px;border-bottom:0}.preview-signature img{max-width:245px;max-height:78px;object-fit:contain}.preview-documento{display:block;font-size:13px;margin-top:4px;color:#111827}.letter-header{display:none}
@media(max-width:980px){.grid-main{grid-template-columns:1fr}.hero{align-items:flex-start;flex-direction:column}.hero-badge{align-self:flex-start}}
@media(max-width:700px){.site-header{padding:12px 16px}.brand-sub{font-size:11px}.admin-link{font-size:12px;padding:8px 10px}.page-wrap{padding:20px 12px 40px}.hero{padding:22px}.hero h1{font-size:26px}.card{padding:18px}.form-grid{grid-template-columns:1fr}.field-full{grid-column:auto}.signature-tools{align-items:flex-start;flex-direction:column}.letter-preview{padding:36px 26px;min-height:700px}.letter-preview p{font-size:13px;line-height:1.72}}