:root {
    --primary-color: #007bff;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
}

body {
    font-family: 'Noto Sans JP', sans-serif, 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    margin: 0;
    padding: 20px 15px;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.3s;
}
a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

header,
.main,
.TTL,
footer {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
}

header {
    background-color: var(--card-bg);
    padding: 20px 25px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

header h1 {
    font-size: 28px;
    margin: 0 0 10px 0;
    color: var(--primary-color);
}

.blacktie {
    background-color: #f5f5f5;
    padding: 10px 15px;
    border-radius: 5px;
}

.blacktie p {
    margin: 0;
    font-size: 14px;
    color: #555;
}

.main {
    margin-bottom: 20px;
}
.main img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: block;
}

.TTL {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    padding: 25px;
    margin-bottom: 20px;
}

.TTL h3 {
    font-size: 22px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 8px;
    margin: 0 0 15px 0;
}

.TTL p {
    font-size: 15px;
    color: #555;
    margin-bottom: 15px;
}
.TTL p small {
    font-size: 13px;
    color: #777;
    display: block;
    line-height: 1.5;
}

.TTL a[href$=".glb"] {
    display: inline-block;
    background-color: var(--primary-color) !important;
    color: #ffffff !important;
    font-weight: 700;
    padding: 12px 20px;
    border-radius: 5px;
    text-decoration: none !important;
    margin-right: 10px;
    margin-bottom: 10px;
}
.TTL a[href$=".glb"]:hover {
    opacity: 0.8;
}

footer {
    background-color: #333 !important;
    color: #f0f0f0;
    padding: 30px 25px;
    border-radius: 8px;
    margin-top: 30px;
    text-align: center;
}

footer h3 {
    font-size: 18px;
    color: #fff;
    margin: 0 0 15px 0;
}

footer a {
    color: #f0f0f0;
    font-weight: 500;
    margin: 0 10px;
}

footer p {
    font-size: 14px;
    color: #aaa;
    margin: 10px 0 0 0;
}