body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    text-align: center;
    padding: 60px 20px;
    margin: 0;
}

.container {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    max-width: 650px;
    margin: 0 auto;
    padding: 40px;
    text-align: left;
}

h1 { 
    color: #d9534f; 
    text-align: center; 
    margin-top: 0;
    font-size: 32px;
}

.subtitle {
    text-align: center;
    color: #666;
    font-style: italic;
    margin-bottom: 35px;
    font-size: 16px;
}

/* 📌 共通のインフォボックス */
.info-box {
    background-color: #f9f9f9;
    border-left: 5px solid #d9534f;
    padding: 20px;
    margin-bottom: 25px;
    border-radius: 0 8px 8px 0;
}

.info-box h3 {
    margin-top: 0;
    color: #333;
    font-size: 18px;
}

.info-box p {
    margin: 0;
    line-height: 1.6;
    color: #555;
}

/* ボックスごとの左線の色カスタム */
.about-box {
    border-left-color: #337ab7;
}

.project-box {
    border-left-color: #5cb85c;
}

ul {
    padding-left: 20px;
    margin: 10px 0 0 0;
    line-height: 1.8;
}

li strong {
    color: #d9534f;
}

.github-link {
    text-align: right;
    margin: 15px 0 0 0 !important;
    font-size: 14px;
}

.github-link a {
    color: #337ab7;
    text-decoration: none;
    font-weight: bold;
}

/* 🚀 ボタン関連 */
.btn-container {
    text-align: center;
    margin-top: 35px;
}

.btn-sns {
    display: inline-block;
    padding: 15px 40px;
    background-color: #d9534f;
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(217, 83, 79, 0.3);
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.btn-sns:hover {
    background-color: #c9302c;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217, 83, 79, 0.4);
}

.footer-text {
    text-align: center;
    font-size: 12px;
    color: #aaa;
    margin-top: 40px;
}