/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

/* コンテナ */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
header {
    background: linear-gradient(135deg, #40E0D0 0%, #2AB8A8 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(64, 224, 208, 0.3);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header .subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    font-weight: 300;
}

/* セクション */
.section {
    padding: 60px 0;
}

.section-alt {
    background-color: #f8fcfc;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #2AB8A8;
    border-bottom: 3px solid #40E0D0;
    padding-bottom: 10px;
    display: inline-block;
}

/* プロフィール */
.profile-content p {
    margin-bottom: 15px;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* アプリセクション */
.apps-content {
    font-size: 1.1rem;
}

.app-list {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.app-placeholder {
    background-color: white;
    border: 2px dashed #40E0D0;
    border-radius: 10px;
    padding: 60px;
    text-align: center;
    color: #2AB8A8;
    font-size: 1.2rem;
}

.app-card {
    background-color: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(64, 224, 208, 0.15);
    transition: all 0.3s ease;
    display: flex;
    gap: 25px;
    align-items: flex-start;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(64, 224, 208, 0.25);
}

.app-card-icon {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.app-card-content {
    flex: 1;
}

.app-card-title {
    font-size: 1.8rem;
    color: #2AB8A8;
    margin-bottom: 12px;
    font-weight: 600;
}

.app-card-description {
    font-size: 1rem;
    color: #555;
    line-height: 1.7;
    margin-bottom: 20px;
}

.app-card-link {
    display: inline-block;
    color: #40E0D0;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.app-card-link:hover {
    color: #2AB8A8;
    border-bottom-color: #2AB8A8;
}

/* お問い合わせ */
.contact-content {
    font-size: 1.1rem;
}

.contact-info {
    margin-top: 30px;
    padding: 30px;
    background-color: #f8fcfc;
    border-left: 4px solid #40E0D0;
    border-radius: 5px;
}

.contact-info p {
    margin: 10px 0;
}

.contact-info a {
    color: #2AB8A8;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: #40E0D0;
    text-decoration: underline;
}

/* プライバシーポリシー */
.privacy-content h3 {
    font-size: 1.4rem;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #2AB8A8;
}

.privacy-content p {
    margin-bottom: 15px;
    line-height: 1.8;
}

/* フッター */
footer {
    background-color: #2AB8A8;
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 60px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    header .subtitle {
        font-size: 1rem;
    }

    .section {
        padding: 40px 0;
    }

    .section h2 {
        font-size: 1.6rem;
    }

    .profile-content p,
    .apps-content,
    .contact-content {
        font-size: 1rem;
    }

    .app-list {
        grid-template-columns: 1fr;
    }

    .app-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .app-card-icon {
        width: 100px;
        height: 100px;
    }

    .app-placeholder {
        padding: 40px 20px;
        font-size: 1rem;
    }

    .contact-info {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.6rem;
    }

    .container {
        padding: 0 15px;
    }

    .section {
        padding: 30px 0;
    }

    .section h2 {
        font-size: 1.4rem;
    }
}

/* アニメーション */
.section {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}