body {
    background-color: #0f141c;
    color: #e2e8f0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    padding: 40px 20px;
    max-width: 800px;
    margin: 0 auto;
}
.card {
    background: #18202c;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    border: 1px solid #2d3d52;
}
h1 {
    color: #38bdf8;
    text-align: center;
    margin-bottom: 30px;
}
.input-group {
    margin-bottom: 20px;
}
input[type="text"] {
    width: 100%;
    padding: 12px;
    background: #0f141c;
    border: 1px solid #334155;
    border-radius: 6px;
    color: #fff;
    box-sizing: border-box;
}
button {
    width: 100%;
    padding: 14px;
    background: #0284c7;
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}
button:disabled {
    background: #334155;
    cursor: not-allowed;
}
#output {
    margin-top: 30px;
    padding: 20px;
    background: #0f141c;
    border-radius: 8px;
    border-left: 4px solid #38bdf8;
    white-space: pre-wrap;
    line-height: 1.6;
}
.compliment {
    border-left-color: #f43f5e !important;
    color: #fda4af;
}