* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Outfit', sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    min-height: 100vh;
    overflow-x: hidden;
}
.layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Sidebar (木目調背景) */
.sidebar {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.8)), url('assets/wood.png');
    background-size: cover;
    background-position: center;
    padding: 20px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.brand-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}
.brand-icon {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.brand-icon img {
    width: 100px;
    height: 100px;
}
.sidebar-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.sidebar nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.sidebar nav li {
    padding: 12px 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    font-weight: 300;
}
.sidebar nav li:hover, .sidebar nav li.active {
    background: rgba(255, 255, 255, 0.15);
    font-weight: 400;
}

/* Main Content (雨の背景) */
.content {
    flex: 1;
    padding: 20px;
    background: url('assets/rainy.png') center/cover no-repeat;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Glassmorphism パネル */
.glass-panel {
    background: rgba(40, 40, 45, 0.4);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    border-left: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* --- 中央パネルのテキスト装飾 --- */
.main-title {
    font-size: 2.2rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
}
.main-subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 35px;
}
.main-body {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}
.main-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
}
.main-body ul {
    list-style-type: disc;
    padding-left: 25px;
    margin-bottom: 25px;
}
.main-body li {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 5px;
}
.thanks-msg {
    margin-top: 40px;
    font-size: 1.1rem;
    font-weight: 400;
    color: #fff;
}
.highlight {
    text-decoration: none;
    padding-bottom: 2px;
    font-weight: 600;
    text-decoration: underline;
}

/* --- 右側パネルの装飾 --- */
.mt { margin-top: 30px; }
.side-panel ul {
    list-style: none;
    margin-top: 10px;
}
.side-panel li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 14px;
    color: #bbb;
}
.status-grid {
    display: grid;
    grid-template-columns: minmax(100px, auto) 1fr;
    gap: 12px 12px;
    margin-top: 15px;
    font-size: 14px;
}
.status-grid dt {
    color: rgba(255, 255, 255, 0.5);
}
.status-grid dd {
    color: rgba(255, 255, 255, 0.9);
}
#news-list a {
    color: #fff;
    text-decoration: none;
}
#news-list a:hover {
    text-decoration: underline;
}

/* PCレスポンシブ対応 */
@media (min-width: 768px) {
    .layout {
        flex-direction: row;
    }
    .sidebar {
        width: 280px;
        min-height: 100vh;
    }
    .content {
        padding: 40px;
        flex-direction: row;
        align-items: flex-start;
    }
    .main-panel {
        flex: 2.5;
    }
    .side-panel {
        flex: 1;
    }
}