:root{
  --bg:#0b1b2a; --card:#12263a; --muted:#9bb0c6; --text:#e7eef6;
  --accent:#6b8afd; --accent2:#8ea8ff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,Segoe UI,Roboto,Arial}
.header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid #1b334a}
.header .left{display:flex;gap:12px;align-items:center}
.logo{background:var(--accent);color:#fff;font-weight:800;border-radius:8px;padding:8px 10px}
.brand .title{font-weight:700}
.brand .tag{font-size:.85rem;color:var(--muted)}
.stamp{color:var(--muted);font-size:.85rem}

.container{max-width:980px;margin:24px auto;padding:0 16px}
.card{background:var(--card);border-radius:14px;padding:18px 18px 22px;box-shadow:0 6px 24px rgba(0,0,0,.25)}
h2{margin:0 0 6px}
.small{color:var(--muted);margin-top:2px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px}
label{display:flex;flex-direction:column;gap:6px;font-size:.95rem}
input,select{background:#0f2133;border:1px solid #1e3a56;border-radius:10px;color:var(--text);padding:10px}
input::placeholder{color:#6f87a1}
.hint{margin-top:8px;color:var(--muted);font-size:.9rem}
.actions{display:flex;gap:10px;align-items:center;margin-top:14px}
button{background:var(--accent);color:#fff;border:0;padding:10px 16px;border-radius:10px;cursor:pointer}
button.secondary{background:#1b2f48}
button:disabled{opacity:.6;cursor:not-allowed}

.result{margin-top:16px}
.row{display:flex;justify-content:space-between;border-bottom:1px dashed #254561;padding:8px 0}
.neto{display:flex;justify-content:space-between;font-size:1.1rem;margin-top:10px;padding:12px;background:#0f2133;border-radius:10px}

.footer{padding:18px 20px;color:var(--muted);text-align:center}
.foot-note{font-style:italic;margin-top:6px}

@media print{
  body{background:#fff;color:#000}
  .header,.footer,.actions,.hint{display:none}
  .card{box-shadow:none;background:#fff}
  .row{border-bottom:1px solid #ccc}
  .neto{background:#f3f3f3}
}