/* 基礎設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft JhengHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* 側邊欄 */
.sidebar {
    width: 250px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: white;
    margin-bottom: 30px;
    text-align: center;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-item:hover, .nav-item.active {
    background: rgba(255, 255, 255, 0.2);
}

.nav-icon {
    font-size: 20px;
}

/* 主內容區 */
.main-content {
    flex: 1;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    color: white;
}

.header h1 {
    font-size: 28px;
}

.user-info {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 20px;
}

.content-area {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 30px;
    min-height: 500px;
}

/* 任務看板 */
.task-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.task-category {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.task-category h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 18px;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.task-item:hover {
    background: #e9ecef;
}

.task-name {
    font-weight: 500;
    color: #333;
}

.task-status {
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
}

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

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

/* 隱藏頁面 */
.hidden {
    display: none;
}

.page-content {
    color: #333;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        padding: 10px;
    }
    
    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .task-board {
        grid-template-columns: 1fr;
    }
}