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

body{
    background:#0f172a;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
    padding:20px;
}

.container{
    width:100%;
    max-width:700px;
    background:#1e293b;
    border-radius:20px;
    padding:30px;
    box-shadow:0 0 25px rgba(56,189,248,.25);
}

h1{
    text-align:center;
    color:#38bdf8;
    margin-bottom:30px;
    font-size:34px;
}

h2{
    color:#ffffff;
    margin:18px 0 10px;
    font-size:18px;
}

.date-box{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:12px;
}

input{
    width:100%;
    padding:14px;
    border:none;
    outline:none;
    border-radius:10px;
    background:#0f172a;
    color:#fff;
    font-size:16px;
}

input::placeholder{
    color:#94a3b8;
}

.buttons{
    display:flex;
    gap:15px;
    margin-top:25px;
}

button{
    flex:1;
    padding:15px;
    border:none;
    border-radius:10px;
    font-size:18px;
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}

button:first-child{
    background:#22c55e;
    color:#fff;
}

button:last-child{
    background:#ef4444;
    color:#fff;
}

button:hover{
    transform:translateY(-2px);
}

.result{
    margin-top:30px;
    background:#0f172a;
    padding:20px;
    border-radius:12px;
}

.result h3{
    color:#38bdf8;
    margin-bottom:15px;
    text-align:center;
}

.result p{
    color:#fff;
    font-size:18px;
    margin:10px 0;
    line-height:1.7;
}

@media(max-width:600px){

.container{
    padding:20px;
}

h1{
    font-size:28px;
}

.date-box{
    grid-template-columns:1fr;
}

.buttons{
    flex-direction:column;
}

button{
    width:100%;
}

.result p{
    font-size:16px;
}

}