/*
 * 基本設定とリセット
 * --------------------------------------------------
 */
:root {
    --bg-color: #0c0c0c;
    --bg-color-light: #1a1a1a;
    --bg-color-lighter: #2a2a2a;
    --border-color: #333;
    --border-color-light: #555;
    --text-color: #e0e0e0;
    --text-color-dark: #aaa;
    --accent-color: #BBDEFB;
    --white: #ffffff;
    --black: #000000;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: var(--white);
    text-decoration: underline;
}

/*
 * ヘッダー
 * --------------------------------------------------
 */
.site-header {
    background-color: rgba(12, 12, 12, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 40px;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    height: 70px;
}

.site-logo {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
}
.site-logo:hover {
    text-decoration: none;
}

.global-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.global-nav a {
    color: var(--text-color-dark);
    font-weight: 600;
    padding: 10px 15px;
    border-radius: 6px;
    transition: color 0.3s, background-color 0.3s;
}

.global-nav a:hover {
    color: var(--white);
    background-color: var(--bg-color-lighter);
    text-decoration: none;
}

.global-nav a.active {
    color: var(--white);
    background-color: var(--bg-color-light);
}


/*
 * メインコンテンツ
 * --------------------------------------------------
 */
.main-container {
    width: 100%;
    max-width: 1400px;
    padding: 30px 40px;
    margin: 0 auto;
}

.breadcrumb {
    font-size: 0.9em;
    color: var(--text-color-dark);
    margin-bottom: 25px;
}
.breadcrumb a {
    color: var(--text-color-dark);
}
.breadcrumb a:hover {
    color: var(--accent-color);
}

.main-layout-container {
    display: flex;
    gap: 30px;
}

.content-area {
    flex-grow: 1;
    min-width: 0;
}

h1 {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 1px;
}

/*
 * 検索エリア
 * --------------------------------------------------
 */
.search-area {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.search-notice {
    font-size: 0.9em;
    color: var(--text-color-dark);
    text-align: center;
    line-height: 1.6;
    background-color: var(--bg-color-light);
    padding: 12px 18px;
    border-radius: 6px;
    border-left: 3px solid var(--border-color-light);
}
.search-notice.notice-info {
    border-left-color: #5C6BC0;
}
.search-notice.notice-info a {
    font-weight: bold;
}
.search-notice strong {
    color: var(--white);
}

.search-input-group {
    display: flex;
    gap: 10px;
}

#searchInput {
    flex-grow: 1;
    padding: 12px 18px;
    border: 1px solid var(--border-color-light);
    border-radius: 6px;
    background-color: var(--bg-color-lighter);
    color: var(--text-color);
    font-size: 1em;
    transition: border-color 0.3s, box-shadow 0.3s;
}
#searchInput::placeholder {
    color: #888;
}
#searchInput:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(187, 222, 251, 0.2);
    outline: none;
}

.search-button {
    background-color: var(--white);
    color: var(--black);
    border: 1px solid var(--white);
    padding: 0 18px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.3em;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
}
.search-button:hover {
    background-color: var(--black);
    color: var(--white);
}

/* コントロール行 */
.controls-row {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 15px;
    padding-top: 15px;
    flex-wrap: wrap;
}

.view-mode-controls,
.sort-controls,
.items-per-page-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.controls-row .icon-button {
    color: var(--text-color-dark);
    font-size: 1.2em;
}

.controls-row select {
    padding: 8px 12px;
    border: 1px solid var(--border-color-light);
    border-radius: 4px;
    background-color: var(--bg-color-lighter);
    color: var(--text-color);
    font-size: 0.9em;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s;
}
.controls-row select:focus {
    border-color: var(--accent-color);
}

.view-mode-controls button,
#refreshButton {
    background-color: transparent;
    color: var(--text-color-dark);
    border: 1px solid var(--border-color-light);
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2em;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-mode-controls button:hover:not(.active),
#refreshButton:hover {
    background-color: var(--bg-color-lighter);
    color: var(--white);
    border-color: var(--white);
}

.view-mode-controls button.active {
    background-color: var(--white);
    border-color: var(--white);
    color: var(--black);
}

/*
 * アイテムリストとカード
 * --------------------------------------------------
 */
.item-list {
    display: grid;
    gap: 25px;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    transition: opacity 0.5s ease-out, grid-template-columns 0.3s, gap 0.3s;
    opacity: 1;
    padding-bottom: 20px;
}
.item-list.fade-out {
    opacity: 0;
}

/* カード共通スタイル */
.item-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color-light);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}
.item-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-color-light);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* グリッド表示 */
.item-list:not(.list-mode) .item-card {
    padding: 20px;
    min-height: 220px;
    justify-content: space-between;
}
.item-list:not(.list-mode) .item-card .card-header h2 {
    font-size: 1.4em;
    color: var(--white);
    margin-bottom: 10px;
    line-height: 1.4;
}
.item-list:not(.list-mode) .item-card .tags {
    margin-bottom: 15px;
}
.item-list:not(.list-mode) .item-card .description-text {
    flex-grow: 1;
    margin-bottom: 15px;
    font-size: 0.95em;
    color: var(--text-color-dark);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}
.item-list:not(.list-mode) .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

/* リスト表示 */
.item-list.list-mode {
    grid-template-columns: 1fr;
    gap: 15px;
}
.item-list.list-mode .item-card {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    padding: 15px 20px;
    gap: 5px 20px;
    align-items: center;
}
.item-list.list-mode .card-header {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
}
.item-list.list-mode .card-header h2 {
    font-size: 1.25em;
    margin: 0;
}
.item-list.list-mode .tags {
    font-size: 0.8em;
}
.item-list.list-mode .description-text {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    font-size: 0.9em;
    color: var(--text-color-dark);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.item-list.list-mode .card-footer {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    gap: 8px;
    height: 100%;
}

/* カード内要素 */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.tag {
    display: inline-block;
    background-color: var(--bg-color-lighter);
    color: var(--text-color-dark);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.8em;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.tag:hover {
    background-color: var(--border-color-light);
    color: var(--white);
    border-color: var(--border-color-light);
}
.card-footer .info {
    font-size: 0.85em;
    color: #888;
}
.card-footer .link a {
    color: var(--black);
    background-color: var(--white);
    border: 1px solid var(--white);
    padding: 8px 18px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s;
    font-size: 0.9em;
}
.card-footer .link a:hover {
    background-color: var(--black);
    color: var(--white);
    text-decoration: none;
}
.item-list.list-mode .card-footer .link a {
    padding: 6px 12px;
    font-size: 0.85em;
}

/*
 * ページネーション
 * --------------------------------------------------
 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 8px;
    flex-wrap: wrap;
}
.pagination button, .pagination span {
    background-color: var(--bg-color-lighter);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 0.9em;
    transition: all 0.3s;
}
.pagination button {
    cursor: pointer;
}
.pagination button:hover:not(:disabled) {
    background-color: var(--border-color-light);
    border-color: var(--border-color-light);
}
.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.pagination button.active {
    background-color: var(--white);
    border-color: var(--white);
    color: var(--black);
    font-weight: bold;
}
.pagination span {
    border: none;
    background: none;
}

/*
 * サイドバー
 * --------------------------------------------------
 */
.sidebar-area {
    flex-shrink: 0;
    width: 300px;
    background-color: var(--bg-color-light);
    border-radius: 8px;
    padding: 25px;
    position: sticky;
    top: 100px; /* header height + margin */
    height: calc(100vh - 130px);
    overflow-y: auto;
}
.sidebar-area h2 {
    font-size: 1.6em;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}
.sidebar-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}
.sidebar-tag-list button {
    background-color: var(--bg-color-lighter);
    color: var(--text-color-dark);
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.3s;
}
.sidebar-tag-list button:hover {
    background-color: var(--border-color-light);
    color: var(--white);
    transform: translateY(-2px);
}
.sidebar-tag-list button.active {
    background-color: var(--white);
    color: var(--black);
    border-color: var(--white);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/*
 * 静的コンテンツページ
 * --------------------------------------------------
 */
.static-content-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-color-light);
    padding: 40px;
    border-radius: 8px;
}
.static-content section {
    margin-bottom: 40px;
}
.static-content h2 {
    font-size: 1.8em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}
.static-content p, .static-content ul, .static-content ol {
    margin-bottom: 15px;
    font-size: 1.05em;
    color: var(--text-color);
}
.static-content ul, .static-content ol {
    padding-left: 25px;
}
.static-content li {
    margin-bottom: 10px;
}
.static-content pre {
    background-color: var(--bg-color);
    padding: 15px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', Courier, monospace;
    color: var(--text-color-dark);
}
.static-content code {
    background-color: #333;
    padding: 2px 5px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
}

/*
 * その他
 * --------------------------------------------------
 */
#toTopButton {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--black);
    color: var(--white);
    border: 1px solid var(--border-color-light);
    border-radius: 50%;
    width: 55px;
    height: 55px;
    font-size: 1.8em;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}
#toTopButton.show {
    opacity: 1;
    visibility: visible;
}
#toTopButton:hover {
    background-color: var(--white);
    color: var(--black);
    transform: scale(1.1);
}

/*
 * レスポンシブ対応
 * --------------------------------------------------
 */
@media (max-width: 1200px) {
    .main-layout-container {
        flex-direction: column;
    }
    .sidebar-area {
        width: 100%;
        position: static;
        height: auto;
        margin-top: 30px;
    }
}

@media (max-width: 768px) {
    .site-header {
        padding: 0 20px;
    }
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 15px 0;
        gap: 15px;
    }
    .main-container {
        padding: 20px;
    }
    .controls-row {
        flex-direction: column;
        align-items: stretch;
    }
    .search-input-group {
        flex-direction: column;
    }
    h1 {
        font-size: 2em;
    }
    .item-list.list-mode .item-card {
        grid-template-columns: 1fr;
    }
    .item-list.list-mode .card-footer {
        grid-column: 1 / 2;
        grid-row: 3 / 4;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        margin-top: 10px;
    }
    .static-content-container {
        padding: 20px;
    }
}