:root{
  --bg-1: linear-gradient(135deg,#0f172a 0%,#04263a 100%);
  --card-bg: #ffffff;
  --accent: #0077ff;
  --accent-2: #00c2ff;
  --muted: #6b7280;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(2,6,23,0.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: var(--bg-1);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:36px;
  color:#0b1220;
}

.app{max-width:1100px;width:100%}
.site-header{display:flex;align-items:center;justify-content:flex-start;padding:12px 0}
.brand{display:flex;align-items:center;gap:16px}
.site-title{margin:0;color:#fff;font-weight:600;font-size:18px}
.logo{border-radius:8px;width:100%;max-width:160px;height:auto;display:block}

.card{background:rgba(255,255,255,0.98);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;display:grid;grid-template-columns:1fr 420px;gap:20px}

.label{display:block;margin-bottom:8px;font-weight:600;color:var(--muted)}
textarea{width:100%;min-height:120px;padding:12px;border-radius:10px;border:1px solid #e6eef6;font-size:14px;resize:vertical}
input[type=number]{width:100%;padding:10px;border-radius:8px;border:1px solid #e6eef6}

.row{display:flex;gap:12px;margin-top:12px}
.col{flex:1}
.actions .buttons{display:flex;gap:8px;align-items:center}

.button{background:var(--card-bg);border:1px solid #e6eef6;padding:10px 12px;border-radius:8px;cursor:pointer;font-weight:600}
.button.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;border:none}
.button.ghost{background:transparent;border:1px solid rgba(11,18,32,0.06)}
.button:focus{outline:3px solid rgba(0,120,255,0.18)}

.help{color:var(--muted);font-size:13px;margin-top:8px}
.mensagem{margin-top:10px;font-weight:600;color:var(--muted)}

.resultados{padding:8px}
.resultado{margin-top:10px;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}
.resultado .item{background:linear-gradient(180deg,#ffffff,#f6fbff);padding:12px;border-radius:10px;box-shadow:0 4px 12px rgba(2,6,23,0.06);text-align:center;font-weight:700}

.result-actions{margin-top:12px;display:flex;gap:8px}

.site-footer{margin-top:12px;color:#cbd5e1;text-align:center}

.confetti-canvas{position:fixed;left:0;top:0;pointer-events:none;width:100%;height:100%;z-index:999}

.autor {
    display: block;
    margin-top: 15px;
    text-align: center;
    font-weight: bold;
    color: #2c5364;
    text-decoration: none;
}

.autor:hover {
    text-decoration: underline;
}


@media (max-width:900px){
  .card{grid-template-columns:1fr}
  .site-title{display:none}
  .row{flex-direction:column}
  .actions .buttons{flex-wrap:wrap}
  .actions .buttons input[type=file]{width:100%}
}

@media (max-width:700px){
  .card{padding:18px;gap:12px}
  textarea{min-height:100px}
  .button{padding:12px;border-radius:10px}
  .resultados{padding:6px}
  .resultado .item{font-size:15px;padding:10px}
}

@media (max-width:480px){
  body{padding:18px}
  .logo{max-width:48px}
  .card{grid-template-columns:1fr; padding:14px}
  .row{gap:8px}
  .actions .buttons{flex-direction:column}
  .actions .buttons .button, .actions .buttons input[type=file]{width:100%}
  .result-actions{flex-direction:column}
  .result-actions .button{width:100%}
  .site-footer{font-size:12px}
}