body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg,#667eea,#764ba2);
}

.app {
  max-width: 420px;
  margin: auto;
  background: #fff;
  min-height: 100vh;
  border-radius: 16px;
  overflow: hidden;
}

.screen {
  display: none;
  padding: 20px;
  animation: slide .4s ease;
}

.screen.active { display: block; }

h1 { color:#333; margin-bottom:5px }
p { color:#666 }

button {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg,#ff512f,#dd2476);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  margin-top: 15px;
}

canvas {
  width: 100%;
  margin-top: 10px;
  border-radius: 12px;
  background: #f1f1f1;
}

select {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.result-card {
  background: #fafafa;
  padding: 15px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,.1);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: #764ba2;
  color: white;
  padding: 10px;
}

td {
  padding: 10px;
  text-align: center;
  border-bottom: 1px solid #ddd;
}

@keyframes slide {
  from {opacity:0; transform:translateY(20px)}
  to {opacity:1; transform:translateY(0)}
}