/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Container styles */
.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 15px;
}

/* Main content styles */
.main-content {
    background-color: #fff;
    width: 100%;
    text-align: center;
}

.logo-text {
    font-size: 1.6rem;
    font-weight: bold;
    color: #2196F3;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.header-section {
    background-color: #2196F3;
    color: #fff;
    padding: 2rem 1.5rem;
    margin: -15px -15px 1.5rem;
    position: relative;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
    color: #fff;
    line-height: 1.4;
}

.subtitle {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.welcome-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Video container styles */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 アスペクト比 */
    margin: 1.5rem 0;
    background-color: #2196F3;
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
}

.video-message {
    text-align: center;
    padding: 1.5rem;
    background-color: #f5f9ff;
    border-radius: 8px;
    margin: 1.5rem 0;
    border: 1px solid #e3f2fd;
}

.video-message p {
    margin-bottom: 0.8rem;
}

.video-message p:last-child {
    margin-bottom: 0;
}

/* CTA section styles */
.cta-section {
    margin: 2rem 0;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: #2196F3;
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: background-color 0.3s ease;
    width: 100%;
    max-width: 400px;
}

.cta-button:hover {
    background-color: #1976D2;
}

.character {
    width: 150px;
    position: absolute;
    right: 20px;
    bottom: -20px;
}

/* Responsive design */
@media screen and (max-width: 768px) {
    .container {
        padding: 12px;
    }

    .header-section {
        margin: -12px -12px 1.5rem;
        padding: 1.5rem 1rem;
    }

    .subtitle {
        font-size: 1.8rem;
    }

    .welcome-text {
        font-size: 1rem;
    }

    .character {
        width: 120px;
    }
}

@media screen and (max-width: 480px) {
    .logo-text {
        font-size: 1.4rem;
        margin-bottom: 0.8rem;
    }

    .header-section {
        padding: 1.2rem 1rem;
    }

    .subtitle {
        font-size: 1.6rem;
    }

    .cta-button {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }

    .video-message {
        padding: 1.2rem;
        margin: 1.2rem 0;
    }

    .character {
        width: 100px;
    }
}