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

html, body {
    color: #333;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

.catch-copy {
    text-align: center;
    padding: 60px 20px;
    background: lightskyblue;
    color: white;
    border-radius: 15px;
    margin-bottom: 60px;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.main-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 4px solid #667eea;
    display: inline-block;
}

.overview {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.overview-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.overview-content span {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
}

.profile-section {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 30px 0;
    margin-bottom: 30px;
}

.profile-image-container {
    flex-shrink: 0;
}

.profile-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #ddd;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.profile-basic {
    flex-grow: 1;
}

.profile-name {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin: 0 50px 10px 0;
}

.profile-role {
    font-size: 16px;
    color: #666;
    font-weight: 500;
    margin: 0 50px 0 0;
}

.profile-content {
    padding: 20px 0;
    line-height: 1.8;
    font-size: 16px;
    color: #555;
    border-top: 1px solid #eee;
    padding-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.profile-content span {
    display: block;
}

.lesson-details {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.lesson-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.lesson-item {
    background: linear-gradient(135deg, #f5f7fa 0%, #eef2f8 100%);
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.lesson-item h4 {
    font-size: 18px;
    color: #667eea;
    margin-bottom: 10px;
    font-weight: 700;
}

.lesson-item span {
    font-size: 15px;
    color: #555;
    line-height: 1.6;
    display: block;
}

.info-section {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.info-card {
    background: rgb(218, 108, 180);
    padding: 25px;
    border-radius: 10px;
    color: white;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.info-label {
    font-size: 14px;
    font-weight: 600;
    opacity: 0.9;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-value {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.5;
}

.info-value a {
    color: #000;
    transition: opacity 0.3s ease;
}

.info-value a:hover,
.info-value a:visited {
    color: #000;
}

.footer {
    text-align: center;
    padding: 40px 20px;
}

.footer-title {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin-bottom: 20px;
}

.sns {
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.follow-text {
    font-size: 14px;
    color: #666;
    font-weight: 600;
}

.instagram-icon {
    display: inline-flex;
    width: 30px;
    height: 30px;
    color: #333;
    transition: color 0.3s ease;
}

.instagram-icon:hover {
    color: #E4405F;
}

.instagram-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

.line-icon {
    display: inline-flex;
    width: 30px;
    height: 30px;
    color: #333;
    transition: color 0.3s ease;
}

.line-icon:hover {
    color: #00B900;
}

.line-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

.fixed-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.fixed-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 600;
}

.fixed-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.fixed-btn svg {
    width: 20px;
    height: 20px;
}

.fixed-btn span {
    white-space: nowrap;
}

.line-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }

    .main-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 24px;
    }

    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .profile-name,
    .profile-role {
        margin: 0;
    }

    .catch-copy,
    .overview,
    .profile-section,
    .lesson-details,
    .info-section {
        padding: 30px 20px;
    }
}