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

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

/* Fullscreen Background Video */
.background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

/* Overlay mit Content */
.video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.content-box {
    text-align: center;
    background: transparent;
    padding: 60px 40px;
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-box h1 {
    font-size: 3.5em;
    color: #1a1a1a;
    margin-bottom: 20px;
    letter-spacing: -1px;
    font-weight: 800;
    display: none;
}

.price {
    font-size: 2em;
    color: #667eea;
    margin-bottom: 50px;
    font-weight: 700;
    display: none;
}

.checkout-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 20px 60px;
    font-size: 1.3em;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: inline-block;
    margin: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.checkout-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

.checkout-btn:active {
    transform: translateY(-1px);
}

.checkout-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.checkout-btn.loading::after {
    content: '';
    display: inline-block;
    width: 14px;
    height: 14px;
    margin-left: 10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.email-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 16px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    border: 2px solid #667eea;
    margin: 15px;
    font-size: 1.1em;
    letter-spacing: 0.5px;
}

.email-button:hover {
    background: #667eea;
    color: white;
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

/* Mobile Responsiv */
@media (max-width: 768px) {
    .content-box {
        padding: 40px 25px;
        max-width: 95%;
    }

    .content-box h1 {
        font-size: 2.2em;
        margin-bottom: 15px;
    }

    .price {
        font-size: 1.5em;
        margin-bottom: 35px;
    }

    .checkout-btn,
    .email-button {
        padding: 16px 30px;
        font-size: 1em;
        margin: 10px;
        width: calc(100% - 20px);
    }
}

@media (max-width: 480px) {
    .content-box h1 {
        font-size: 1.8em;
    }

    .price {
        font-size: 1.2em;
    }

    .checkout-btn,
    .email-button {
        padding: 14px 20px;
        font-size: 0.95em;
    }
}