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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #0a0a0a;
    color: #e0e0e0;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 40px auto;
    padding: 20px;
    background-color: #121212;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

header {
    text-align: center;
    padding: 20px;
    background: #1e1e1e;
    border-bottom: 1px solid #333;
}

header h1 {
    font-size: 2rem;
    color: #fff;
}

header p {
    color: #aaa;
    margin-top: 10px;
}

.info-section {
    padding: 20px;
    background: #1a1a1a;
    border-bottom: 1px solid #333;
}

.info-section h2 {
    color: #fff;
    margin-bottom: 10px;
}

.info-section p {
    margin-bottom: 10px;
    color: #ccc;
}

code {
    background: #2d2d2d;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    color: #00ffcc;
}

.converter {
    padding: 20px;
    background: #121212;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #bbb;
    font-weight: 500;
}

#input {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: #222;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

#input:focus {
    background: #2a2a2a;
    box-shadow: 0 0 0 2px #00ffcc;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

button {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#toChar {
    background: #00ffcc;
    color: #000;
}

#toCode {
    background: #ff00cc;
    color: #fff;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.result {
    min-height: 60px;
    padding: 15px;
    text-align: center;
    background: #1a1a1a;
    border-radius: 8px;
    font-size: 2rem;
    font-weight: bold;
    color: #00ffcc;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed #444;
}

.result.error {
    color: #ff5555;
    background: #222;
}

footer {
    text-align: center;
    padding: 20px;
    color: #aaa;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        margin: 10px;
        padding: 10px;
    }

    .button-group {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}