/* 全域樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 標題列 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
}

.header h1 i {
    margin-right: 10px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* 按鈕樣式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary {
    background: #4CAF50;
    color: white;
}

.btn-primary:hover {
    background: #45a049;
}

.btn-secondary {
    background: #2196F3;
    color: white;
}

.btn-secondary:hover {
    background: #1976D2;
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

.btn-danger {
    background: #f44336;
    color: white;
}

.btn-danger:hover {
    background: #da190b;
}

.btn-success {
    background: #4CAF50;
    color: white;
}

.btn-success:hover {
    background: #45a049;
}

/* 統計卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.open {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.stat-icon.progress {
    background: linear-gradient(135deg, #feca57, #ff9ff3);
}

.stat-icon.closed {
    background: linear-gradient(135deg, #48dbfb, #0abde3);
}

.stat-icon.total {
    background: linear-gradient(135deg, #a55eea, #8c7ae6);
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-content p {
    color: #666;
    font-size: 14px;
}

/* 篩選器 */
.filters {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    font-weight: 500;
    color: #555;
    white-space: nowrap;
}

.filter-group select {
    padding: 8px 12px;
    border: 2px solid #e1e5e9;
    border-radius: 6px;
    font-size: 14px;
    min-width: 150px;
}

.filter-group select:focus {
    outline: none;
    border-color: #667eea;
}

/* 問題容器 */
.issues-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.issues-header {
    padding: 20px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.issues-header h2 {
    color: #333;
    font-size: 1.5rem;
}

/* ============================= */
/* 網格檢視樣式 (issues-grid) */
/* ============================= */

.issues-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
    background-color: #fafbfc;
}

.issues-grid .issue-item {
    border: 1px solid #e1e5e9;
    border-radius: 10px;
    background: white;
    padding: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.issues-grid .issue-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    background-color: #f9faff;
}

.issues-grid .issue-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.issues-grid .issue-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.issues-grid .issue-meta {
    font-size: 13px;
    color: #777;
    gap: 8px;
}

.issues-grid .issue-description {
    font-size: 13px;
    color: #555;
    margin-top: 10px;
    line-height: 1.4;
}

.view-toggle {
    display: flex;
    gap: 5px;
}

.view-toggle .btn.active {
    background: #667eea;
    color: white;
}

/* 問題列表 */
.issues-list {
    min-height: 400px;
}

.issue-item {
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
    transition: background-color 0.3s ease;
    cursor: pointer;
}

.issue-item:hover {
    background-color: #f8f9fa;
}

.issue-item:last-child {
    border-bottom: none;
}

.issue-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.issue-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.issue-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 14px;
    color: #666;
}

.issue-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.issue-description {
    color: #666;
    margin-top: 10px;
    line-height: 1.5;
}

.issue-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

/* 狀態標籤 */
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.status-open {
    background: #ffe6e6;
    color: #d63031;
}

.status-in_progress {
    background: #fff3cd;
    color: #856404;
}

.status-closed {
    background: #d4edda;
    color: #155724;
}

/* 優先級標籤 */
.priority-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.priority-high {
    background: #ffebee;
    color: #c62828;
}

.priority-medium {
    background: #fff3e0;
    color: #ef6c00;
}

.priority-low {
    background: #e8f5e8;
    color: #2e7d32;
}

/* 模態框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
}

.modal-content.large {
    max-width: 800px;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: #333;
}

.close {
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: #999;
    transition: color 0.3s ease;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e1e5e9;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 表單樣式 */
.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #e1e5e9;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* 分頁 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
    padding: 20px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    color: #333;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination button:hover:not(:disabled) {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination .active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* 載入指示器 */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
    font-size: 16px;
}

.loading i {
    margin-right: 10px;
    font-size: 20px;
}

/* 動畫 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* 響應式設計 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .header-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group select {
        min-width: auto;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .issue-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .issue-meta {
        flex-direction: column;
        gap: 5px;
    }
}

/* 空狀態 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 20px;
    color: #ccc;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #999;
}

/* 成功/錯誤訊息 */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}