body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
    box-sizing: border-box;
}

#app {
    background-color: #1e1e1e;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    text-align: center;
    width: 100%;
    max-width: 600px;
}

h1 {
    color: #bb86fc;
    margin-top: 0;
}

.controls {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.mode-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.delay-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#delay-value {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    color: #03dac6;
    min-width: 45px;
    text-align: left;
}

#symbol-mode {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #333;
    background-color: #2c2c2c;
    color: #e0e0e0;
    font-size: 1rem;
}

label {
    font-size: 1rem;
}

#char-count {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #333;
    background-color: #2c2c2c;
    color: #e0e0e0;
    width: 80px;
    font-size: 1rem;
    text-align: center;
}

#generate-btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 4px;
    background-color: #bb86fc;
    color: #121212;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-size: 1rem;
}

#generate-btn:hover {
    background-color: #3700b3;
    color: #e0e0e0;
}

#output-container {
    background-color: #000000;
    border: 1px solid #333;
    border-radius: 4px;
    min-height: 150px;
    padding: 1rem;
    text-align: left;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

#output {
    white-space: pre-wrap;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.1rem;
    color: #03dac6;
    margin: 0;
}