/* bb_wiki Frontend Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Header and Navigation */
.header {
    background: #343a40;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: white;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.nav-links a:hover {
    background-color: rgba(255,255,255,0.1);
}

.nav-auth {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-user {
    color: #adb5bd;
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: #6c757d;
    font-size: 1.1rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    overflow: hidden;
}

.card-header {
    background: #f8f9fa;
    padding: 1rem;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
}

.card-body {
    padding: 1rem;
}

.card-footer {
    background: #f8f9fa;
    padding: 0.75rem 1rem;
    border-top: 1px solid #dee2e6;
    font-size: 0.875rem;
    color: #6c757d;
}

/* Article List */
.article-list {
    display: grid;
    gap: 1rem;
}

.article-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
}

.article-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    text-decoration: none;
    color: inherit;
}

.article-content {
    flex: 1;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #495057;
}

.article-summary {
    color: #6c757d;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: #6c757d;
}

.article-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #495057;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

.form-control.is-invalid {
    border-color: #dc3545;
}

.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #dc3545;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 400;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    text-decoration: none;
    color: white;
}

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

.btn-secondary:hover {
    background-color: #545b62;
    border-color: #545b62;
    text-decoration: none;
    color: white;
}

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

.btn-success:hover {
    background-color: #1e7e34;
    border-color: #1e7e34;
    text-decoration: none;
    color: white;
}

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

.btn-danger:hover {
    background-color: #c82333;
    border-color: #c82333;
    text-decoration: none;
    color: white;
}

.btn-warning {
    color: #212529;
    background-color: #ffc107;
    border-color: #ffc107;
}

.btn-warning:hover {
    background-color: #e0a800;
    border-color: #e0a800;
    text-decoration: none;
    color: #212529;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.badge-primary { background-color: #007bff; color: white; }
.badge-secondary { background-color: #6c757d; color: white; }
.badge-success { background-color: #28a745; color: white; }
.badge-danger { background-color: #dc3545; color: white; }
.badge-warning { background-color: #ffc107; color: #212529; }
.badge-light { background-color: #f8f9fa; color: #212529; }
.badge-dark { background-color: #343a40; color: white; }

/* Search */
.search-form {
    display: flex;
    margin-bottom: 2rem;
}

.search-input {
    flex: 1;
    margin-right: 0.5rem;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-select {
    padding: 0.5rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    background: white;
}

/* Article Reader */
.article-reader {
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #dee2e6;
}

.article-title-display {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #212529;
}

.article-meta-display {
    color: #6c757d;
    font-size: 1rem;
}

.article-content-display {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.article-content-display h1,
.article-content-display h2,
.article-content-display h3,
.article-content-display h4,
.article-content-display h5,
.article-content-display h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.article-content-display p {
    margin-bottom: 1rem;
}

.article-content-display ul,
.article-content-display ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.article-content-display blockquote {
    border-left: 4px solid #007bff;
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: #6c757d;
}

.article-content-display code {
    background: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

.article-content-display pre {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1rem 0;
}

/* Loading and Empty States */
.loading {
    text-align: center;
    padding: 2rem;
    color: #6c757d;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.empty-state h3 {
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .container {
        padding: 1rem;
    }
    
    .article-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .article-actions {
        margin-left: 0;
        margin-top: 1rem;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-input {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
    
    .article-title-display {
        font-size: 2rem;
    }
}

/* Modal styles for confirmations */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
}

.modal-header {
    margin-bottom: 1rem;
}

.modal-footer {
    margin-top: 1rem;
    text-align: right;
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: #6c757d; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }