*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial,sans-serif;
}

body{
background:#f2f2f2;
display:flex;
justify-content:center;
align-items:center;
min-height:100vh;
padding:20px;
}

.container{
background:white;
padding:25px;
border-radius:15px;
box-shadow:0 5px 20px rgba(0,0,0,.2);
width:100%;
max-width:420px;
text-align:center;
}

h1{
margin-bottom:20px;
color:#333;
}

input{
width:100%;
padding:10px;
margin:8px 0;
border:1px solid #ccc;
border-radius:8px;
}

button{
width:100%;
padding:12px;
border:none;
border-radius:8px;
background:#2196F3;
color:white;
font-size:16px;
cursor:pointer;
}

button:hover{
background:#1976D2;
}

canvas{
margin-top:20px;
max-width:100%;
border:1px solid #ddd;
}

a{
display:inline-block;
margin-top:15px;
text-decoration:none;
background:#4CAF50;
color:white;
padding:10px 18px;
border-radius:8px;
}
.tool{
margin:15px 0;
}

.tool a{
display:block;
padding:18px;
background:#2196F3;
color:white;
text-decoration:none;
border-radius:10px;
font-size:18px;
font-weight:bold;
transition:.3s;
}

.tool a:hover{
background:#1565C0;
}

/* ===== Premium Dark Mode ===== */

body.dark{
    background:#0f172a;
    color:#ffffff;
}

body.dark .container{
    background:#1e293b;
}

body.dark .tool a{
    background:#2563eb;
    color:#ffffff;
    border:none;
}

body.dark input,
body.dark select{
    background:#334155;
    color:#ffffff;
    border:1px solid #475569;
}

body.dark h1{
    color:#38bdf8;
}

body.dark h2{
    color:#7dd3fc;
}

body.dark p{
    color:#cbd5e1;
}

body.dark hr{
    border-color:#475569;
}

body.dark footer{
    color:#cbd5e1;
}
footer{
    text-align:center;
    padding:40px 20px;
    margin-top:20px;
}

.hero-box{
  background:#f5f5f5;
  padding:18px;
  border-radius:12px;
  margin:20px 0;
  text-align:center;
}

.hero-box h2{
  margin-bottom:10px;
}

.hero-box p{
  margin:6px 0;
}