* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background: #0f0f0f;
    color: white;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 700px;
}

h1 {
    text-align: center;
    font-size: 40px;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #aaa;
    margin-bottom: 30px;
}

.card {
    background: #1b1b1b;
    border: 1px solid #333;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
}

.card h2 {
    margin-bottom: 20px;
}

.inputs {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.inputs div {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #bbb;
}

input,
textarea {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #444;
    background: #101010;
    color: white;
    font-size: 16px;
}

textarea {
    height: 150px;
    resize: vertical;
    margin-bottom: 15px;
}

button {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 8px;
    background: #ffffff;
    color: #111;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    transform: scale(1.02);
    background: #dddddd;
}

.result {
    margin-top: 20px;
    min-height: 80px;
    border-radius: 10px;
    background: #101010;
    border: 1px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    color: white;
}

@media (max-width: 600px) {
    .inputs {
        flex-direction: column;
    }

    h1 {
        font-size: 30px;
    }
}