:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --success-color: #22c55e;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ヘッダー */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    padding: 1.5rem 0;
    text-align: center;
}

.site-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.site-title .icon {
    font-size: 2.5rem;
}

.site-description {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.lang-selector {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.lang-btn {
    padding: 0.375rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
}

.lang-btn:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* メインコンテンツ */
.main-content {
    background: var(--bg-primary);
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
    margin: 2rem 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* 検索セクション */
.search-section {
    max-width: 800px;
    margin: 0 auto 2rem;
    padding: 0 1rem;
}

.search-container {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    background: var(--bg-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 10;
}

.suggestion-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.suggestion-item:hover {
    background: var(--bg-secondary);
}

.suggestion-code {
    font-weight: 600;
    color: var(--primary-color);
}

.suggestion-name {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* フィルター */
.quick-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
}

.filter-btn:hover {
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 結果コンテナ */
.results-container {
    padding: 0 1rem;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0 0.5rem;
}

.results-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.results-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ステータスグリッド */
.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 0 0.5rem;
}

.status-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.status-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.status-header {
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.status-code {
    font-size: 1.25rem;
    font-weight: 700;
}

.status-name {
    font-size: 0.875rem;
    opacity: 0.8;
}

.status-body {
    padding: 1.25rem;
    background: var(--bg-primary);
}

.status-description {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.status-details {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* カテゴリー別の色 */
.category-1 {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.category-2 {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
}

.category-3 {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
}

.category-4 {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.category-5 {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    padding: 2rem;
    overflow-y: auto;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-header {
    padding: 1.5rem;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    color: white;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.modal-category {
    font-size: 0.875rem;
    opacity: 0.9;
}

.modal-section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-section:last-child {
    border-bottom: none;
}

.modal-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.modal-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.solution-text {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--success-color);
}

/* フッター */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    margin-top: 2rem;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    box-shadow: var(--shadow-lg);
}

.footer-content {
    padding: 3rem 1rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-section p,
.footer-section li {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.footer-bottom {
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.5rem;
    }
    
    .site-title .icon {
        font-size: 2rem;
    }
    
    .status-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-filters {
        flex-direction: column;
    }
    
    .filter-btn {
        width: 100%;
    }
    
    .modal {
        padding: 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}