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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

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

.content {
    text-align: center;
    animation: fadeIn 0.8s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    font-size: 3.5rem;
    color: #ffffff;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.email-form {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.email-form input {
    flex: 1;
    min-width: 250px;
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.95);
    color: #333;
    transition: all 0.3s ease;
}

.email-form input::placeholder {
    color: #999;
}

.email-form input:focus {
    outline: none;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.email-form button {
    padding: 14px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    background: #ffffff;
    color: #667eea;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.email-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.email-form button:active {
    transform: translateY(0);
}

.notification {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    min-height: 1.5rem;
}

.notification.success {
    color: #4ade80;
}

.notification.error {
    color: #f87171;
}

@media (max-width: 640px) {
    h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .email-form {
        flex-direction: column;
    }

    .email-form input,
    .email-form button {
        width: 100%;
    }
}