body{
  font-family: Arial, Helvetica, sans-serif;
  background:#f5f7fa;
  margin:0;
  padding:0;
}

.container{
  max-width:1100px;
  margin:auto;
  padding:20px;
}

/* PANEL */
.panel{
  background:white;
  padding:20px;
  margin-top:20px;
  border-radius:10px;
  box-shadow:0 2px 8px rgba(0,0,0,0.1);
}

/* INPUT */
input{
  padding:8px;
  margin-right:10px;
  border-radius:6px;
  border:1px solid #ccc;
}

/* BUTTON */
button{
  padding:8px 12px;
  margin:5px;
  border:none;
  background:#2b7cff;
  color:white;
  border-radius:6px;
  cursor:pointer;
}

button:hover{
  background:#1f5fd1;
}

/* CARDS */
.targets{
  display:flex;
  gap:20px;
  margin-top:20px;
  justify-content:center;
}

.card{
  width:150px;
  height:190px;
  border:2px solid #ccc;
  border-radius:10px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  background:white;
}

.shape{
  font-size:32px;
}

/* COLORS */
.red{color:#d33;}
.green{color:#2a7;}
.blue{color:#36c;}
.yellow{color:#e6b800;}

/* CURRENT CARD */
.current{
  margin-top:40px;
  display:flex;
  justify-content:center;
}

/* FEEDBACK */
#feedback{
  margin-top:15px;
  font-weight:bold;
  text-align:center;
}

/* TABLE */
table{
  width:100%;
  border-collapse:collapse;
  margin-top:10px;
}

th{
  background:#2b7cff;
  color:white;
  padding:6px;
}

td{
  border:1px solid #ddd;
  padding:6px;
  text-align:center;
}

.ok{
  background:#e6ffe6;
}

.err{
  background:#ffe6e6;
}

/* CHART */
canvas{
  margin-top:20px;
  background:white;
  padding:10px;
  border-radius:8px;
}