body {
            font-family: Arial, sans-serif;
            margin: 0;
            background-color: #f4f6f8;
        }

        header {
            background-color: #ffffff;
            padding: 20px 50px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 28px;
            font-weight: bold;
        }

        .login-button {
            background-color: #222222;
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            text-decoration: none;
        }

        .hero {
            text-align: center;
            padding: 80px 20px;
        }

        .hero h1 {
            font-size: 60px;
            margin-bottom: 20px;
        }

        .hero p {
            font-size: 20px;
            color: #555555;
        }

        .webinar-section {
            max-width: 1000px;
            margin: auto;
            padding: 20px;
        }

        .webinar-card {
            background-color: white;
            padding: 25px;
            border-radius: 12px;
            margin-top: 20px;
        }

        .webinar-card h2 {
            margin-top: 0;
        }

        .watch-button {
            display: inline-block;
            margin-top: 15px;
            background-color: #222222;
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            text-decoration: none;
        }

        .webinar-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.webinar-image {
    height: 160px;
    background-color: #e2e8f0;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}
.webinar-page {
    max-width: 1000px;
    margin: 60px auto;
    padding: 0 20px;
}

.webinar-page h1 {
    font-size: 42px;
    margin-bottom: 10px;
}

.webinar-subtitle {
    font-size: 20px;
    color: #555555;
    margin-bottom: 40px;
}

.video-container {
    width: 100%;
    background-color: #111111;
    border-radius: 12px;
    overflow: hidden;
}

.video-placeholder {
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 30px;
}

.webinar-description,
.webinar-materials {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    margin-top: 30px;
}
.video-container {
    max-width: 900px;
    margin: 40px auto;
    background-color: #111111;
    border-radius: 12px;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    display: block;
}
.webinar-page {
    max-width: 1100px;
    margin: 60px auto;
    padding: 0 30px;
}

.webinar-page h1 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 10px;
}

.webinar-subtitle {
    text-align: center;
    font-size: 20px;
    color: #555555;
}
.webinar-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    color: #666666;
    font-size: 15px;
}
.material-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.material-item {
    background-color: #f5f6f8;
    padding: 20px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.material-item strong {
    font-size: 18px;
}

.material-item p {
    margin: 6px 0 0 0;
    color: #666666;
}

.material-button {
    background-color: #222222;
    color: white;
    padding: 10px 16px;
    border-radius: 6px;
    text-decoration: none;
}