:root {
    --bg: #0f172a;
    --card: #1e293b;
    --input: #334155;
    --primary: #4f46e5;
    --success: #22c55e;
    --danger: #ef4444;
    --text: #ffffff;
}

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

body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, sans-serif;

    display: flex;
    justify-content: center;
    align-items: center;

    padding: 20px;
}

.container {
    width: 100%;
    max-width: 800px;
}

.card {
    background: var(--card);
    border-radius: 16px;
    padding: 24px;
}

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

.subtitle {
    text-align: center;
    opacity: 0.8;
    margin-bottom: 20px;
}

input {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: var(--input);
    color: white;
    font-size: 16px;
}

.buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

button {
    flex: 1;
    border: none;
    border-radius: 10px;
    padding: 14px;
    cursor: pointer;
    font-size: 15px;
}

.primary-btn {
    background: var(--primary);
    color: white;
}

.secondary-btn {
    background: #475569;
    color: white;
}

.result {
    display: none;
    margin-top: 20px;
    padding: 15px;
    border-radius: 10px;
    word-break: break-word;
    background: #111827;
}

.copy-btn {
    display: none;
    margin-top: 15px;
    width: 100%;
    background: var(--success);
    color: white;
}

.success {
    color: var(--success);
}

.error {
    color: var(--danger);
}

@media (max-width: 600px) {

    .buttons {
        flex-direction: column;
    }

    button {
        width: 100%;
    }

    .card {
        padding: 18px;
    }
}