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

body{
background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);
color:#fff;
min-height:100vh;
}

header{
text-align:center;
padding:60px 20px;
}

header h1{
font-size:42px;
font-weight:700;
}

header p{
margin-top:10px;
opacity:.85;
}

#alertBox{
text-align:center;
margin:15px;
font-weight:600;
color:#ffbaba;
}

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

.tools{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
gap:25px;
}

.tool{
background:rgba(255,255,255,0.08);
border:1px solid rgba(255,255,255,0.15);
border-radius:18px;
padding:25px;
backdrop-filter:blur(10px);
transition:.3s;
}

.tool:hover{
transform:translateY(-6px);
box-shadow:0 25px 40px rgba(0,0,0,.4);
}

.tool h3{
margin-bottom:12px;
}

.tool input, .tool select{
width:100%;
padding:10px;
border-radius:8px;
margin-bottom:12px;
}

.tool button{
width:100%;
padding:12px;
border:none;
border-radius:10px;
background:linear-gradient(90deg,#ff8a00,#e52e71);
color:white;
font-weight:600;
cursor:pointer;
}

footer{
text-align:center;
padding:30px;
opacity:.6;
font-size:14px;
}