/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: #2d83e0;
    color: #FFF;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Container */
.container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.content {
    text-align: center;
    max-width: 800px;
    width: 100%;
}

/* Logo */
.logo {
    margin-bottom: 30px;
}

.logo img {
    max-width: 100%;
    height: auto;
    width: 600px;
    max-height: 200px;
}

/* Video Container */
.video-container {
    margin-bottom: 35px;
    width: 100%;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.video-container iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
}

/* Event Details */
.event-details {
    margin-bottom: 50px;
}

.event-details p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.date {
    font-size: 1.1rem;
    font-weight: 500;
}

.description {
    font-size: 0.95rem;
    font-weight: 300;
}

.notice {
    font-size: 0.9rem;
    font-weight: 400;
    margin-top: 10px;
}

.ja {
    display: block;
    margin-bottom: 2px;
}

.en {
    display: block;
    font-size: 0.9em;
    opacity: 0.9;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 30px;
    justify-content: center;
    align-items: center;
}

.social-links a {
    color: #FFF;
    font-size: 2rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    transform: scale(1.15);
    opacity: 0.8;
}

.social-links a:active {
    transform: scale(1.05);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .logo img {
        width: 100%;
        max-width: 400px;
    }
    
    .logo {
        margin-bottom: 20px;
    }
    
    .video-container {
        margin-bottom: 25px;
        max-width: 100%;
    }
    
    .event-details {
        margin-bottom: 40px;
    }
    
    .date {
        font-size: 1rem;
    }
    
    .description {
        font-size: 0.9rem;
    }
    
    .social-links {
        gap: 25px;
    }
    
    .social-links a {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .logo img {
        max-width: 300px;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .video-container {
        margin-bottom: 20px;
    }
    
    .event-details {
        margin-bottom: 35px;
    }
    
    .date {
        font-size: 0.95rem;
    }
    
    .description {
        font-size: 0.85rem;
    }
    
    .social-links {
        gap: 20px;
    }
    
    .social-links a {
        font-size: 1.8rem;
    }
}

@media (max-height: 600px) {
    .logo {
        margin-bottom: 20px;
    }
    
    .logo img {
        max-height: 120px;
    }
    
    .event-details {
        margin-bottom: 25px;
    }
    
    .event-details p {
        margin-bottom: 15px;
    }
}