/* 基礎樣式 */
* {
    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: #333;
    background-color: #f5f5f5;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

.container-sm {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 導航欄 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

.navbar-brand:hover {
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
}

.navbar-nav a {
    color: #666;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.navbar-nav a:hover {
    background-color: #f0f0f0;
    text-decoration: none;
}

.navbar-nav .btn {
    color: #fff;
}

/* 按鈕 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    text-align: center;
    transition: all 0.3s;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #6c757d;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.btn-success {
    background-color: #28a745;
    color: #fff;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545;
    color: #fff;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.2em;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.9em;
}

.btn-block {
    display: block;
    width: 100%;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-text {
    font-size: 0.85em;
    color: #666;
    margin-top: 5px;
}

/* 卡片 */
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 20px;
}

.card-header {
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.5em;
    margin-bottom: 10px;
}

/* 警告訊息 */
.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

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

/* Hero 區塊 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2em;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* 功能區塊 */
.features {
    padding: 60px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 20px;
}

.feature-item h3 {
    margin-bottom: 15px;
}

/* 表格 */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* 頁腳 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    text-align: center;
}

.footer a {
    color: #aaa;
}

.footer a:hover {
    color: #fff;
}

/* 儀表板 */
.dashboard {
    padding: 30px 0;
}

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

.dashboard-title {
    font-size: 1.8em;
}

/* 狀態標籤 */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: 500;
}

.badge-success {
    background-color: #d4edda;
    color: #155724;
}

.badge-warning {
    background-color: #fff3cd;
    color: #856404;
}

.badge-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.badge-secondary {
    background-color: #e9ecef;
    color: #495057;
}

/* 分頁認證 */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    width: 100%;
    max-width: 450px;
}

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

    .navbar-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 1.8em;
    }

    .hero p {
        font-size: 1em;
    }

    .dashboard-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .table {
        display: block;
        overflow-x: auto;
    }
}

/* 工具類別 */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }