:root {
    --primary-color: #1e1e2f;
    --secondary-color: #27293d;
    --accent-color: #61dafb;
    --text-color: #ffffff;
    --text-muted: #cccccc;
    --error-color: #ff6b6b;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --hover-accent-color: #4ac4e5;
}

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

body {
    font-family: 'Fira Code', 'Arial', sans-serif;
    background-color: var(--primary-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 500px;
    width: 100%;
    background-color: var(--secondary-color);
    border-radius: 10px;
    box-shadow: 0px 4px 15px var(--shadow-color);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
    box-shadow: 0px 6px 20px rgba(0, 0, 0, 0.3);
}

.header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #444;
}

.header h1 {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 5px;
}

.header p {
    font-size: 1rem;
    color: var(--text-muted);
}

.main {
    padding: 20px;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: var(--text-muted);
}

input {
    padding: 10px;
    border: 1px solid transparent;
    border-radius: 5px;
    font-size: 1rem;
    background-color: var(--primary-color);
    color: var(--text-color);
    outline: none;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
    display: none;
}

input:focus {
    border-color: var(--accent-color);
    background-color: var(--secondary-color);
}

input:disabled {
    cursor: not-allowed;
    background-color: var(--secondary-color);
    opacity: 0.6;
}

.btn {
    padding: 12px;
    background-color: var(--accent-color);
    color: var(--text-color);
    font-size: 1rem;
    font-weight: bold;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: var(--hover-accent-color);
}

.btn:active {
    transform: scale(0.98);
}

.output {
    margin-top: 20px;
    padding: 15px;
    background-color: var(--primary-color);
    border-radius: 5px;
    text-align: center;
    font-size: 1rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

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

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

.footer {
    padding: 15px;
    text-align: center;
    background-color: var(--primary-color);
    border-top: 1px solid #444;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--hover-accent-color);
}

/* Responsive Design */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header p {
        font-size: 0.9rem;
    }

    .btn {
        font-size: 0.9rem;
        padding: 10px;
    }

    .footer {
        font-size: 0.8rem;
    }
}