/* カスタムスタイル */
:root {
    /* 保険業界らしい信頼と安心を表現する配色 */
    --primary-color: #1e3a8a;        /* 深い信頼のブルー（金融・保険業界の定番） */
    --secondary-color: #3b82f6;      /* 明るい青（安心感・清潔感） */
    --accent-color: #f59e0b;         /* 温かみのあるオレンジ（親しみやすさ） */
    --success-color: #059669;        /* 深緑（安全・承認） */
    --warning-color: #dc2626;        /* 注意・重要事項用の赤 */
    --info-color: #0ea5e9;           /* 情報表示用の明るい青 */
    --text-color: #1f2937;           /* 濃いグレー（読みやすさ重視） */
    --text-light: #6b7280;           /* ライトグレー */
    --light-bg: #f8fafc;             /* 清潔感のある背景 */
    --card-bg: #ffffff;              /* カード背景（純白） */
    --border-color: #e5e7eb;         /* 境界線色 */
    --white: #ffffff;
    
    /* シャドウ（保険サイトらしい上品さ） */
    --shadow-sm: 0 1px 2px rgba(30, 58, 138, 0.05);
    --shadow-md: 0 4px 6px rgba(30, 58, 138, 0.07);
    --shadow-lg: 0 10px 15px rgba(30, 58, 138, 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.25);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition-base: 0.3s ease;
    --transition-fast: 0.15s ease;
    --transition-slow: 0.5s ease;
    --font-family-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
    
    /* アクセシビリティ変数 */
    --focus-ring: 0 0 0 3px rgba(59, 130, 246, 0.25);
    --hover-lift: translateY(-2px);
    --scale-hover: scale(1.02);
}

/* ダークモード対応 - 無効化 */
/* 
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #f3f4f6;
        --text-light: #9ca3af;
        --light-bg: #111827;
        --card-bg: #1f2937;
        --border-color: #374151;
        --white: #1f2937;
        --primary-color: #3b82f6;
        --secondary-color: #1e3a8a;
        --accent-color: #f59e0b;
        
        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.15);
        --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.25);
    }
}
*/

/* 運動視差を好まないユーザー向け */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-base: 0s;
        --transition-fast: 0s;
        --transition-slow: 0s;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 基本設定 */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    height: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: #ffffff !important;
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    color: var(--text-color);
    height: 100%;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    padding-top: 56px; /* 固定ナビゲーション分のスペース確保 */
    background-color: #ffffff !important;
    /* 強制的に明るい背景を維持 */
}

/* 全体のコンテナも明るい背景を強制 */
main, .container, section {
    background-color: inherit;
}

/* カード要素の背景も確実に明るく */
.card {
    background-color: #ffffff !important;
    color: #333 !important;
}


/* ヒーローセクション */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 80px 0;
    margin-bottom: 0;
}

.hero-section h1 {
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* カードスタイル */
.card {
    border: none;
    border-radius: var(--border-radius);
    transition: transform var(--transition-base);
    height: 100%;
    will-change: transform;
    display: flex;
    flex-direction: column;
    box-shadow: none !important;
}

.card-body {
    flex-grow: 1;
}

.card:hover {
    transform: translateY(-0.25rem);
}

@media (prefers-reduced-motion: reduce) {
    .card {
        transition: none;
    }
    .card:hover {
        transform: none;
    }
}

.card-img-top {
    height: 12.5rem;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

/* 評価スタイル */
.rating {
    font-size: 1.1rem;
}

.rating .text-warning {
    color: #ffc107 !important;
}

/* ボタンスタイル */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
    will-change: transform;
}

.btn-primary:hover {
    background-color: #cc3322;
    border-color: #cc3322;
    transform: translateY(-0.125rem);
    box-shadow: var(--shadow-md);
}

@media (prefers-reduced-motion: reduce) {
    .btn-primary:hover {
        transform: none;
    }
}

.btn-outline-primary {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: transparent;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    transform: translateY(-0.125rem);
}

.btn:focus {
    outline: 2px solid;
    outline-offset: 2px;
    outline-color: var(--secondary-color);
}

@media (prefers-reduced-motion: reduce) {
    .btn-outline-primary:hover {
        transform: none;
    }
}

/* ナビゲーション */
nav.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1030;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* メインナビゲーションの明るい配色 */
.navbar.bg-primary {
    background: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.15);
}

.navbar.bg-primary .navbar-brand {
    color: #ffffff !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.navbar.bg-primary .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: all var(--transition-base);
}

.navbar.bg-primary .navbar-nav .nav-link:hover,
.navbar.bg-primary .navbar-nav .nav-link:focus {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 0.375rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    margin: 0 0.625rem;
    transition: color var(--transition-base);
    position: relative;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.25rem;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link:focus::after {
    width: 80%;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
    color: var(--secondary-color) !important;
}

/* セクションスタイル */
section h2 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 30px;
    position: relative;
    display: inline-block;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--secondary-color);
}

/* フッター */
footer {
    margin-top: 50px;
}

/* 高機能シミュレーター */
#simulator .card-header {
    background: var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

#simulator .form-label.fw-bold {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

#simulator .form-select,
#simulator .form-range {
    border-radius: var(--border-radius);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#simulator .form-select:focus,
#simulator .form-range:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
    outline: none;
}

#simulator .form-text {
    color: #6c757d;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* 比較テーブル */
#comparison .table {
    border-radius: var(--border-radius);
    overflow: hidden;
}

#comparison .table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    font-weight: 600;
    padding: 1rem;
    text-align: center;
}

#comparison .table td {
    padding: 0.75rem;
    vertical-align: middle;
    border-color: #dee2e6;
}

#comparison .table-warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid #ffc107;
}

#comparison .progress {
    height: 1rem;
    border-radius: var(--border-radius);
}

#comparison .progress-bar {
    background: linear-gradient(90deg, #28a745, #20c997);
    border-radius: var(--border-radius);
}

/* ランキングカード */
#ranking .card.border-warning {
    border: none !important;
}

#ranking .badge.bg-primary {
    background: var(--primary-color) !important;
}

/* モバイル最適化 - より確実なブレークポイント */
@media screen and (max-width: 991px), 
       screen and (max-device-width: 991px),
       (hover: none) and (pointer: coarse) {
    body {
        padding-top: 56px; /* モバイルでもデスクトップと同じ高さ */
        font-size: 14px; /* モバイルでのベースフォントサイズ */
    }
    
    .hero-section {
        padding: 2rem 0; /* パディングを少し削減 */
        text-align: center;
    }
    
    .hero-section h1 {
        font-size: 1.4rem; /* さらに小さく */
        line-height: 1.3;
        margin-bottom: 1rem;
    }
    
    .hero-section p {
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }
    
    .card-img-top {
        height: 9.375rem;
    }
    
    .navbar-nav .nav-link {
        margin: 0 0.25rem;
        padding: 0.5rem 0.75rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.625rem 1.25rem;
    }
    
    /* 高機能シミュレーター */
    #simulator .col-md-3 {
        margin-bottom: 15px;
    }
    
    #simulator .btn-lg {
        font-size: 1rem;
        padding: 10px 20px;
    }
    
    /* 比較フィルター */
    #comparison .col-md-3 {
        margin-bottom: 15px;
    }
    
    #comparison .form-range {
        margin-bottom: 10px;
    }
    
    /* ランキングカード */
    #ranking .col-lg-4 {
        margin-bottom: 20px;
    }
    
    #ranking .card-body {
        padding: 1rem;
    }
    
    #ranking .h5 {
        font-size: 1.1rem;
    }
    
    /* テーブルレスポンシブ */
    .table-responsive {
        font-size: 0.75rem;
    }
    
    .table th, .table td {
        padding: 0.25rem;
        white-space: nowrap;
        font-size: 0.7rem;
    }
    
    .table th {
        font-size: 0.65rem;
    }
    
    /* テーブルは横スクロールで対応 */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch; /* iOSでスムーズスクロール */
    }
    
    .comparison-table-enhanced .table {
        min-width: 800px; /* 最小幅を設定して横スクロールを促進 */
    }
    
    /* 品種別ガイド */
    #breed-guide .card-title {
        font-size: 1rem;
    }
    
    #breed-guide .card-text {
        font-size: 0.85rem;
    }
    
    /* FAQ */
    .accordion-button {
        font-size: 0.9rem;
        padding: 0.75rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 0.625rem;
    }
    
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section h1 {
        font-size: 1.5rem;
        line-height: 1.1;
    }
    
    .hero-section p {
        font-size: 0.8rem;
        line-height: 1.4;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    /* ナビゲーション */
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .navbar-nav .nav-link {
        margin: 0 5px;
        font-size: 0.9rem;
    }

    /* ボタンのタッチターゲット拡大 */
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    /* シミュレーター改善 */
    #simulator {
        margin-bottom: 3rem;
    }
    
    #simulator h2 {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
        text-align: center;
    }
    
    #simulator .card-header h3 {
        font-size: 1.1rem;
    }
    
    #simulator .form-label {
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: 0.5rem;
    }
    
    #simulator .form-select,
    #simulator .form-control {
        font-size: 0.9rem;
        padding: 0.75rem;
        border-radius: 0.5rem;
    }

    #simulator .col-md-3 {
        margin-bottom: 1rem;
    }
    
    #simulator .col-md-6 {
        margin-bottom: 1rem;
    }
    
    /* シミュレーター結果カード */
    #simulatorResults .card {
        margin-bottom: 1rem;
        border: 1px solid var(--border-color);
    }
    
    #simulatorResults .card-header {
        background-color: var(--light-bg);
        padding: 0.75rem;
    }
    
    #simulatorResults .card-body {
        padding: 1rem;
    }
    
    /* モーダル改善 */
    .modal-dialog {
        margin: 0.5rem;
        max-width: calc(100vw - 1rem);
    }
    
    .modal-header {
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .modal-title {
        font-size: 1.1rem;
        font-weight: 600;
    }
    
    .modal-body {
        padding: 1rem;
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .modal-body h6 {
        font-size: 1rem;
        margin-top: 1.5rem;
        margin-bottom: 0.75rem;
        color: var(--primary-color);
    }
    
    .modal-footer {
        padding: 0.75rem 1rem;
        border-top: 1px solid var(--border-color);
    }
    
    /* ナビゲーション改善 */
    .navbar-collapse {
        background-color: var(--primary-color);
        border-radius: 0.5rem;
        margin-top: 0.5rem;
        padding: 0.5rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
        margin: 0.25rem 0;
        border-radius: 0.375rem;
        transition: background-color 0.3s ease;
    }
    
    .navbar-nav .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(1.875rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: no-preference) {
    .card {
        animation: fadeInUp 0.6s ease forwards;
    }
    
    .card:nth-child(2) {
        animation-delay: 0.1s;
    }
    
    .card:nth-child(3) {
        animation-delay: 0.2s;
    }
}

@media (prefers-reduced-motion: reduce) {
    .card {
        animation: none;
    }
}

/* ホバーエフェクト */
.card-body {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.card-text {
    color: #666;
    margin-bottom: 15px;
}

/* カテゴリーセクション */
#categories .card {
    background-color: var(--light-bg);
    border: none;
    transition: all 0.3s ease;
}

#categories .card:hover {
    background-color: white;
    border-color: var(--secondary-color);
}

#categories .card-title {
    color: var(--secondary-color);
}

#categories .card-text {
    color: #777;
}

/* フォーカス指示器 */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* スキップリンク */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 6px;
}

/* プリファードモーション対応 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #34495e;
        --secondary-color: #5dade2;
        --accent-color: #e67e22;
        --text-color: #ecf0f1;
        --light-bg: #2c3e50;
    }
    
    body {
        background-color: #1a1a1a;
        color: var(--text-color);
    }
    
    .card {
        background-color: #2c3e50;
        color: var(--text-color);
    }
    
    .navbar-dark {
        background-color: #1a1a1a !important;
    }
}

/* === 新機能: マイクロインタラクション強化 === */

/* ボタンホバーエフェクト強化 */
.btn {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    border: none;
    font-weight: 500;
}

.btn:hover {
    transform: var(--hover-lift);
}

.btn:focus {
    outline: none;
}

.btn:active {
    transform: translateY(0);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

/* カードホバーエフェクト強化 */
.card {
    transition: all var(--transition-base);
    border: none;
}

.card:hover {
    transform: var(--hover-lift);
}

.card:focus-within {
    box-shadow: var(--focus-ring);
}

/* インタラクティブな進捗インジケーター */
.progress-enhanced {
    height: 8px;
    background: var(--light-bg);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -50%; }
    100% { left: 100%; }
}

/* パルスエフェクト */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* === 新機能: プログレッシブ開示 === */

.expandable-content {
    max-height: 100px;
    overflow: hidden;
    transition: max-height var(--transition-slow);
    position: relative;
}

.expandable-content.expanded {
    max-height: 1000px;
}

.expandable-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50px;
    background: linear-gradient(transparent, var(--white));
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.expandable-content.expanded::after {
    opacity: 0;
}

.expand-toggle {
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    font-weight: 500;
    text-decoration: underline;
    padding: 5px 0;
}

.expand-toggle:hover {
    color: var(--primary-color);
}

/* === 新機能: 保存機能インジケーター === */

.save-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    transform: translateX(100px);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 1050;
}

.save-indicator.show {
    transform: translateX(0);
    opacity: 1;
}

.save-indicator.error {
    background: var(--accent-color);
}

/* === 新機能: 比較テーブル強化 === */

.comparison-table-enhanced {
    position: relative;
    overflow-x: auto;
}

.comparison-table-enhanced .table th {
    position: sticky;
    top: 0;
    background: var(--primary-color);
    color: white;
    z-index: 10;
}

.comparison-table-enhanced .table tbody tr {
    transition: background-color var(--transition-fast);
}

.comparison-table-enhanced .table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.comparison-checkbox {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.comparison-table-enhanced tr:hover .comparison-checkbox {
    opacity: 1;
}

/* === 新機能: スマートな通知システム === */

.notification-container {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 300px;
    z-index: 1060;
}

.notification {
    background: white;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    padding: 15px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid var(--success-color);
}

.notification.error {
    border-left: 4px solid var(--accent-color);
}

.notification.warning {
    border-left: 4px solid var(--warning-color);
}

/* === 新機能: インタラクティブなローディング === */

.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--border-radius);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.loading-skeleton.text {
    height: 1em;
    margin-bottom: 0.5em;
}

.loading-skeleton.title {
    height: 1.5em;
    width: 60%;
}

.loading-skeleton.image {
    height: 200px;
    width: 100%;
}

/* === アクセシビリティ強化 === */

/* フォーカス管理の改善 */
*:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.btn:focus,
.form-control:focus,
.form-select:focus {
    box-shadow: var(--focus-ring);
    border-color: var(--secondary-color);
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #0066cc;
        --accent-color: #cc0000;
        --text-color: #000000;
    }
    
    .card {
        border: 2px solid #000000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* 印刷スタイル */
@media print {
    .navbar,
    .btn,
    footer,
    .modal {
        display: none !important;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}

/* おすすめバッジの位置調整 */
.badge-recommend {
    position: absolute;
    top: -8px;
    right: -8px;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    border: 2px solid white;
}

/* カード text-center の見た目改善 */
.card.text-center {
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    overflow: hidden;
    position: relative;
}

.card.text-center::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.card.text-center:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%);
    border-color: var(--secondary-color);
}

.card.text-center .card-body {
    padding: 2rem 1.5rem;
    position: relative;
    z-index: 2;
}

.card.text-center .card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.card.text-center .card-text {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card.text-center .btn {
    border-radius: 25px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.85rem;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    background: transparent;
    transition: all var(--transition-base);
}

.card.text-center .btn:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.card.text-center .btn:active {
    transform: translateY(0);
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .card.text-center {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        color: var(--text-color);
        border-color: #495057;
    }
    
    .card.text-center:hover {
        background: linear-gradient(135deg, #34495e 0%, #3a4b5c 100%);
        border-color: var(--secondary-color);
    }
}

/* レスポンシブ調整 */
@media screen and (max-width: 991px) {
    .card.text-center .card-body {
        padding: 1.5rem 1rem;
    }
    
    .card.text-center .card-title {
        font-size: 1.1rem;
    }
    
    .card.text-center .card-text {
        font-size: 0.9rem;
        min-height: 2.5rem;
    }
    
    .card.text-center .btn {
        padding: 0.625rem 1.5rem;
        font-size: 0.8rem;
    }
}

/* ランキングカード（col-lg-4 col-md-6 mb-4）の見た目改善 */
.col-lg-4 .card,
.col-md-6 .card {
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    overflow: hidden;
    position: relative;
}

.col-lg-4 .card::before,
.col-md-6 .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 1;
}

.col-lg-4 .card:hover,
.col-md-6 .card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
    background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%);
}

.col-lg-4 .card.border-warning::before,
.col-md-6 .card.border-warning::before {
    background: linear-gradient(90deg, #ffc107, #ff9500, #ff6b35);
}

.col-lg-4 .card.border-warning,
.col-md-6 .card.border-warning {
    border-color: #ffc107;
    background: linear-gradient(135deg, #fff9e6 0%, #fff4d6 100%);
}

.col-lg-4 .card.border-warning:hover,
.col-md-6 .card.border-warning:hover {
    border-color: #ff9500;
    background: linear-gradient(135deg, #fff9e6 0%, #fff0c7 100%);
}

.col-lg-4 .card-header,
.col-md-6 .card-header {
    background: rgba(248, 249, 250, 0.8) !important;
    border-bottom: 1px solid #dee2e6;
    padding: 1.25rem 1rem;
    position: relative;
    z-index: 2;
}

.col-lg-4 .card-body,
.col-md-6 .card-body {
    padding: 1.5rem;
    position: relative;
    z-index: 2;
}

.col-lg-4 .card-title,
.col-md-6 .card-title {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.col-lg-4 .text-primary,
.col-md-6 .text-primary {
    color: var(--secondary-color) !important;
    font-weight: 700;
}

.col-lg-4 .badge,
.col-md-6 .badge {
    border-radius: 15px;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 3;
}

.col-lg-4 .btn,
.col-md-6 .btn {
    border-radius: 20px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-base);
}

.col-lg-4 .btn:hover,
.col-md-6 .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .col-lg-4 .card,
    .col-md-6 .card {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        border-color: #495057;
        color: var(--text-color);
    }
    
    .col-lg-4 .card:hover,
    .col-md-6 .card:hover {
        background: linear-gradient(135deg, #34495e 0%, #3a4b5c 100%);
        border-color: var(--secondary-color);
    }
    
    .col-lg-4 .card-header,
    .col-md-6 .card-header {
        background: rgba(52, 73, 94, 0.8) !important;
        border-bottom-color: #495057;
    }
    
    .col-lg-4 .card.border-warning,
    .col-md-6 .card.border-warning {
        background: linear-gradient(135deg, #3a3526 0%, #4a4232 100%);
    }
    
    .col-lg-4 .card.border-warning:hover,
    .col-md-6 .card.border-warning:hover {
        background: linear-gradient(135deg, #4a4232 0%, #5a5242 100%);
    }
}

/* レスポンシブ調整 */
@media screen and (max-width: 991px) {
    .col-lg-4 .card-body,
    .col-md-6 .card-body {
        padding: 1.25rem;
    }
    
    .col-lg-4 .card-header,
    .col-md-6 .card-header {
        padding: 1rem 0.75rem;
    }
    
    .col-lg-4 .btn,
    .col-md-6 .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
}