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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* 畫面切換 */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* 登入畫面 */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}

.login-form {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-form input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    margin-bottom: 15px;
}

.login-form button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-form button:hover {
    background: #5568d3;
}

.error {
    color: #ef4444;
    font-size: 14px;
    margin-top: 10px;
}

/* 導航列 */
.navbar {
    background: white;
    padding: 20px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    font-size: 1.5rem;
    color: #667eea;
}

.nav-buttons {
    display: flex;
    gap: 10px;
}

.nav-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: #666;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-btn:hover {
    background: #f3f4f6;
}

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

.logout-btn {
    padding: 8px 20px;
    border: none;
    background: #ef4444;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s;
}

.logout-btn:hover {
    background: #dc2626;
}

/* 頁面 */
.page {
    display: none;
    padding: 30px;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.page-header h2 {
    color: white;
}

/* 按鈕 */
.btn-primary {
    padding: 10px 20px;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: #f3f4f6;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    padding: 10px 20px;
    background: #6b7280;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-danger {
    padding: 6px 12px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-edit {
    padding: 6px 12px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 5px;
    transition: background 0.3s;
}

.btn-edit:hover {
    background: #2563eb;
}

.btn-send {
    padding: 6px 12px;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 5px;
    transition: background 0.3s;
}

.btn-send:hover {
    background: #059669;
}

.btn-send:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

/* 表格 */
.table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #667eea;
    color: white;
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 15px;
    border-bottom: 1px solid #e5e7eb;
}

tbody tr:hover {
    background: #f9fafb;
}

.loading {
    text-align: center;
    color: #9ca3af;
    padding: 30px !important;
}

.status-active {
    color: #10b981;
    font-weight: 600;
}

.status-inactive {
    color: #ef4444;
    font-weight: 600;
}

.times-badge {
    display: inline-block;
    background: #dbeafe;
    color: #1e40af;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-right: 5px;
    margin-bottom: 3px;
}

/* Modal */
.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;
}

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

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

.modal-content {
    background: white;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
}

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

.modal-header {
    padding: 20px 30px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: #667eea;
}

.close {
    color: #9ca3af;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 30px;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid #e5e7eb;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #374151;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="date"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group input[type="checkbox"] {
    margin-right: 8px;
}

.info-box {
    background: #eff6ff;
    border-left: 4px solid #3b82f6;
    padding: 15px;
    margin-top: 15px;
    border-radius: 5px;
}

.info-box p {
    color: #1e40af;
    font-size: 14px;
    margin-bottom: 5px;
}

.info-box p:first-child {
    font-weight: 600;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 10px;
    }

    .modal-content {
        width: 95%;
    }
}