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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: #000000;
    color: #ffffff;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    border-bottom: 1px solid #333333;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    gap: 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: #ffffff;
    text-decoration: none;
}

main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 2rem;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

button {
    background-color: #0070f3;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    padding: 0.625rem 1.25rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #0060d3;
}

button:disabled {
    background-color: #333333;
    cursor: not-allowed;
}

.message {
    margin-top: 1rem;
    font-size: 0.875rem;
    display: none;
}

.message.error {
    display: block;
    color: #ff6b6b;
}

.message.success {
    display: block;
    color: #00ff88;
}

.empty {
    color: #555555;
    font-size: 0.875rem;
    font-style: italic;
}

@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    main {
        padding: 2rem 1rem;
    }
}