*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}
body{
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: #0f172a;
    padding: 18px;
}
.app{
    width: 100%;
    max-width: 520px;
    background: #fff;
    border-radius: 14px;
    padding: 22px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.25);
}
h1{
    font-size: 22px;
    color: #0b1220;
}
.sub{
    margin-top: 8px;
    color: #4b5563;
    font-size: 14px;
    line-height: 1.4;
}
.label{
    display: block;
    margin-top: 18px;
    margin-bottom: 8px;
    color: #111827;
    font-weight: 600;
    font-size: 14px;
}
textarea{
    width: 100%;
    min-height: 140px;
    resize: vertical;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    padding: 12px;
    font-size: 15px;
    outline: none;
    background: #f8fafc;
    color: #0b1220;
}
textarea:focus{
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.row{
    display: flex;
    gap: 10px;
    margin-top: 14px;
}
.btn{
    flex: 1;
    border: 1px solid #cbd5e1;
    background: #fff;
    color: #111827;
    padding: 11px 12px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
}
.btn:hover{
    background: #f1f5f9;
}
.btn:active{
    transform: scale(0.99);
}
.primary{
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}
.primary:hover{
    background: #1d4ed8;
}
.status{
    margin-top: 12px;
    font-size: 14px;
    min-height: 18px;
    color: #0f172a;
}

@media (max-width: 480px){
    .app{
        padding: 16px;
    }
    .row{
        flex-direction: column;
    }
}