:root {
    --bg-color: #0a0a0a;
    --text-color: #e0e0e0;
    --accent-color: #ffffff;
    --secondary-text: #888888;
    --input-bg: #1a1a1a;
    --border-color: #333333;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
}

.container {
    max-width: 600px;
    padding: 2rem;
    width: 100%;
}

h1 {
    font-size: 3rem;
    font-weight: 200;
    letter-spacing: 0.2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.tagline {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 300;
}

.description {
    color: var(--secondary-text);
    font-size: 0.9rem;
    margin-bottom: 3rem;
}

.input-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
}

input[type="email"] {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 1rem;
    flex-grow: 1;
    outline: none;
    transition: border-color 0.2s;
}

input[type="email"]:focus {
    border-color: var(--accent-color);
}

button {
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

button:hover {
    opacity: 0.9;
}

.message {
    margin-top: 1rem;
    font-size: 0.9rem;
    min-height: 1.5rem;
}

.message.success {
    color: #4caf50;
}

.message.error {
    color: #f44336;
}

footer {
    margin-top: 4rem;
    font-size: 0.8rem;
    color: var(--secondary-text);
}

@media (max-width: 480px) {
    .input-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}