/* Knowledge Base Pro - Main Styles */

/* CSS Variables */
:root {
    --kb-primary: #4285f4;
    --kb-primary-hover: #3367d6;
    --kb-primary-light: #e8f0fe;
    --kb-background: #ffffff;
    --kb-background-light: #f8f9fa;
    --kb-background-hover: #f1f3f4;
    --kb-text-primary: #202124;
    --kb-text-secondary: #5f6368;
    --kb-text-muted: #80868b;
    --kb-border: #dadce0;
    --kb-border-light: #e8eaed;
    --kb-shadow: 0 1px 3px rgba(60, 64, 67, 0.3);
    --kb-shadow-hover: 0 4px 8px rgba(60, 64, 67, 0.15);
    --kb-radius: 8px;
    --kb-transition: all 0.2s ease;
    --kb-sidebar-width: 280px;
}

/* Dark Theme */
[data-theme="dark"] {
    --kb-background: #1f1f1f;
    --kb-background-light: #2d2d2d;
    --kb-background-hover: #404040;
    --kb-text-primary: #e8eaed;
    --kb-text-secondary: #9aa0a6;
    --kb-text-muted: #80868b;
    --kb-border: #5f6368;
    --kb-border-light: #404040;
}

/* Base Styles */
.kb-container * { box-sizing: border-box; }

/* LAYOUT */
.kb-container {
    display: flex;
    min-height: 100vh;
    background: var(--kb-background-light);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--kb-text-primary);
    line-height: 1.5;
}

/* SIDEBAR */
.kb-sidebar {
    width: var(--kb-sidebar-width);
    min-width: var(--kb-sidebar-width);
    background: var(--kb-background);
    border-right: 1px solid var(--kb-border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.kb-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--kb-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kb-sidebar-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
    color: var(--kb-text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-icon { font-size: 18px; }

.kb-sidebar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--kb-radius);
    transition: var(--kb-transition);
}

.kb-sidebar-toggle:hover { background: var(--kb-background-hover); }

/* Search Container */
.kb-search-container {
    padding: 16px 20px;
    border-bottom: 1px solid var(--kb-border-light);
}

.kb-search-form { position: relative; }

.kb-search-input {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    font-size: 14px;
    background: var(--kb-background);
    color: var(--kb-text-primary);
    transition: var(--kb-transition);
}

.kb-search-input:focus {
    outline: none;
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 2px var(--kb-primary-light);
}

.kb-search-input::placeholder { color: var(--kb-text-muted); }

.kb-search-button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.kb-search-icon {
    width: 18px;
    height: 18px;
    fill: var(--kb-text-muted);
}

/* Navigation */
.kb-nav { flex: 1; padding: 8px 0; }
.kb-nav-list { list-style: none; margin: 0; padding: 0; }
.kb-nav-item { position: relative; }

.kb-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--kb-text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--kb-transition);
    border-left: 3px solid transparent;
}

.kb-nav-link:hover {
    background: var(--kb-background-hover);
    color: var(--kb-primary);
}

.kb-nav-link.active {
    background: var(--kb-primary-light);
    border-left-color: var(--kb-primary);
    color: var(--kb-primary);
}

.kb-nav-icon { font-size: 16px; width: 16px; text-align: center; }

.kb-protected-icon {
    margin-left: auto;
    font-size: 12px;
}

.kb-nav-item.has-children > .kb-nav-link { padding-left: 36px; }

.kb-nav-toggle {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--kb-transition);
}

.kb-nav-toggle:hover { background: var(--kb-background-hover); }

.kb-nav-arrow {
    width: 12px;
    height: 12px;
    fill: var(--kb-text-muted);
    transition: var(--kb-transition);
}

.kb-nav-item.expanded .kb-nav-arrow { transform: rotate(90deg); }

.kb-nav-sublist {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.kb-nav-item.expanded .kb-nav-sublist { max-height: 500px; }

.kb-nav-sublink {
    display: block;
    padding: 8px 20px 8px 52px;
    color: var(--kb-text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: var(--kb-transition);
}

.kb-nav-sublink:hover {
    background: var(--kb-background-hover);
    color: var(--kb-primary);
}

.kb-nav-subitem.current .kb-nav-sublink {
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-weight: 500;
}

/* MAIN CONTENT */
.kb-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Top Navigation */
.kb-top-nav {
    background: var(--kb-background);
    border-bottom: 1px solid var(--kb-border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    position: sticky;
    top: 0;
    z-index: 999;
}

.kb-nav-buttons {
    display: flex;
    gap: 12px;
    flex: 1;
}

.kb-nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--kb-background-light);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    color: var(--kb-text-primary);
    text-decoration: none;
    font-size: 13px;
    transition: var(--kb-transition);
    min-width: 0;
}

.kb-nav-btn:hover {
    background: var(--kb-background-hover);
    border-color: var(--kb-primary);
    color: var(--kb-primary);
}

.kb-nav-btn-icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
    flex-shrink: 0;
}

.kb-nav-btn-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
}

.kb-nav-btn-label {
    font-size: 11px;
    color: var(--kb-text-muted);
    font-weight: 400;
}

.kb-nav-btn-title {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

.kb-nav-next .kb-nav-btn-content { align-items: flex-end; }

/* Top Actions */
.kb-top-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--kb-radius);
    transition: var(--kb-transition);
    color: var(--kb-text-secondary);
}

.kb-action-btn:hover {
    background: var(--kb-background-hover);
    color: var(--kb-primary);
}

.kb-action-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    stroke: currentColor;
}

.kb-mobile-menu-toggle {
    display: none;
}

/* Language Switcher */
.kb-language-switcher {
    position: relative;
}

.kb-lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--kb-background);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow-hover);
    min-width: 120px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--kb-transition);
}

.kb-language-switcher:hover .kb-lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.kb-lang-option {
    display: block;
    padding: 8px 12px;
    color: var(--kb-text-primary);
    text-decoration: none;
    font-size: 13px;
    transition: var(--kb-transition);
}

.kb-lang-option:hover {
    background: var(--kb-background-hover);
    color: var(--kb-primary);
}

.kb-lang-option.active {
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-weight: 500;
}

/* Main Article */
.kb-main-article {
    flex: 1;
    padding: 24px;
    max-width: 100%;
    overflow-x: auto;
}

/* Breadcrumb */
.kb-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--kb-text-muted);
    margin-bottom: 20px;
}

.kb-breadcrumb-link {
    color: var(--kb-text-secondary);
    text-decoration: none;
    transition: var(--kb-transition);
}

.kb-breadcrumb-link:hover { color: var(--kb-primary); }

.kb-breadcrumb-separator { color: var(--kb-text-muted); }

.kb-breadcrumb-current {
    color: var(--kb-text-primary);
    font-weight: 500;
}

/* Featured Article */
.kb-featured-article {
    background: var(--kb-background);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    overflow: hidden;
}

.kb-article-header {
    padding: 24px;
    border-bottom: 1px solid var(--kb-border-light);
}

.kb-article-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--kb-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-protected-badge {
    font-size: 10px;
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    padding: 2px 6px;
    border-radius: 4px;
}

.kb-article-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--kb-text-primary);
    margin: 0;
    line-height: 1.3;
}

.kb-article-meta {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.kb-article-date { color: var(--kb-text-muted); }

/* Article Content */
.kb-article-content {
    padding: 24px;
    max-width:1280px;
}
.kb-article-content img{ max-width:640px;margin-bottom:40px;}
.kb-article-body {
    font-size: 16px;
    line-height: 1.6;
    color: var(--kb-text-primary);
}

.kb-article-body h2,
.kb-article-body h3,
.kb-article-body h4 {
    color: var(--kb-text-primary);
    margin-top: 24px;
    margin-bottom: 12px;
}

.kb-article-body p {
    margin-bottom: 16px;
}

.kb-article-body ul,
.kb-article-body ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.kb-article-body li {
    margin-bottom: 4px;
}

.kb-article-body a {
    color: var(--kb-primary);
    text-decoration: none;
}

.kb-article-body a:hover {
    text-decoration: underline;
}

/* Password Protection */
.kb-password-form {
    background: var(--kb-background);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    text-align: center;
    padding: 40px;
    max-width: 500px;
    margin: 0 auto;
}

.kb-password-form h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--kb-text-primary);
    line-height: 1.3;
}

.kb-password-form h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--kb-text-secondary);
}

.kb-password-form p {
    color: var(--kb-text-secondary);
    margin-bottom: 24px;
    font-size: 16px;
    line-height: 1.5;
}

.kb-password-header h1 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--kb-text-primary);
}

.kb-password-message {
    color: var(--kb-text-secondary);
    margin-bottom: 24px;
}

.kb-password-form-container,
.kb-password-form-content {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 24px;
}

.kb-password-input-group {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.kb-password-form input[type="password"],
.kb-password-input {
    padding: 12px 16px;
    border: 2px solid var(--kb-border);
    border-radius: var(--kb-radius);
    font-size: 16px;
    background: var(--kb-background);
    color: var(--kb-text-primary);
    min-width: 200px;
    flex: 1;
    transition: var(--kb-transition);
}

.kb-password-form input[type="password"]:focus,
.kb-password-input:focus {
    outline: none;
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 3px var(--kb-primary-light);
}

.kb-password-submit,
.kb-password-button {
    background: var(--kb-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--kb-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--kb-transition);
    white-space: nowrap;
}

.kb-password-submit:hover,
.kb-password-button:hover {
    background: var(--kb-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--kb-shadow-hover);
}

.kb-password-error {
    background: #fef2f2;
    color: #dc2626;
    padding: 12px 16px;
    border-radius: var(--kb-radius);
    margin-bottom: 16px;
    font-size: 14px;
    border: 1px solid #fecaca;
}

/* Mobile styles for password form */
@media (max-width: 768px) {
    .kb-password-form {
        padding: 32px 20px;
        margin: 20px 16px;
        max-width: calc(100% - 32px);
    }
    
    .kb-password-form h1 {
        font-size: 24px;
    }
    
    .kb-password-form h3 {
        font-size: 16px;
    }
    
    .kb-password-form-container {
        flex-direction: column;
        gap: 16px;
    }
    
    .kb-password-input-group {
        flex-direction: column;
        gap: 16px;
        max-width: 100%;
    }
    
    .kb-password-form input[type="password"] {
        width: 100%;
        min-width: auto;
    }
    
    .kb-password-submit {
        width: 100%;
        padding: 14px 24px;
    }
}

/* Feedback Section */
.kb-feedback-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--kb-border-light);
    text-align: center;
        margin-bottom: 24px;
}

.kb-feedback-question {
    font-size: 16px;
    font-weight: 500;
    color: var(--kb-text-primary);
    margin-bottom: 16px;
    display: block;
}

.kb-feedback-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.kb-feedback-btn {
    background: var(--kb-background-light);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    padding: 8px 16px;
    cursor: pointer;
    transition: var(--kb-transition);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.kb-feedback-btn:hover {
    background: var(--kb-background-hover);
    border-color: var(--kb-primary);
}

.kb-feedback-btn.voted {
    background: var(--kb-primary-light);
    border-color: var(--kb-primary);
    color: var(--kb-primary);
}

.kb-feedback-count {
    background: var(--kb-background);
    border-radius: 12px;
    padding: 2px 6px;
    font-size: 11px;
    font-weight: 600;
    min-width: 18px;
    text-align: center;
}

/* No Articles */
.kb-no-articles {
    text-align: center;
    padding: 60px 24px;
    color: var(--kb-text-secondary);
}

.kb-no-articles h2 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--kb-text-primary);
}

/* Mobile Styles */
@media (max-width: 768px) {
    .kb-container {
        position: relative;
    }
    
    .kb-sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        z-index: 1001;
        transition: left 0.3s ease;
        box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    }
    
    .kb-sidebar.open,
    .kb-sidebar.kb-sidebar-open {
        left: 0;
    }
    
    .kb-main {
        width: 100%;
        margin-left: 0;
    }
    
    .kb-mobile-menu-toggle {
        display: flex !important;
    }
    
    .kb-top-nav {
        padding: 8px 16px;
    }
    
    .kb-nav-buttons {
        display: none;
    }
    
    .kb-main-article {
        padding: 16px;
    }
    
    .kb-article-title {
        font-size: 24px;
    }
    
    .kb-nav-btn-title {
        max-width: 80px;
    }
    
    .kb-password-form-container,
    .kb-password-form-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .kb-password-input {
        min-width: auto;
        width: 100%;
    }
    
    .kb-feedback-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* Mobile Sidebar Overlay */
.kb-sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.kb-sidebar-overlay.show,
.kb-sidebar-overlay.kb-sidebar-overlay-active {
    display: block;
}

@media (max-width: 480px) {
    .kb-sidebar {
        width: 90%;
    }
    
    .kb-main-article {
        padding: 12px;
    }
    
    .kb-article-title {
        font-size: 22px;
    }
    
    .kb-top-actions {
        gap: 4px;
    }
    
    .kb-action-btn {
        padding: 6px;
    }
    
    .kb-action-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* Search Results */
.kb-search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--kb-background);
    border: 1px solid var(--kb-border);
    border-top: none;
    border-radius: 0 0 var(--kb-radius) var(--kb-radius);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
}

.kb-search-result {
    padding: 8px 16px;
    border-bottom: 1px solid var(--kb-border-light);
    cursor: pointer;
    transition: var(--kb-transition);
}

.kb-search-result:hover {
    background: var(--kb-background-hover);
}

.kb-search-result:last-child {
    border-bottom: none;
}

.kb-search-result-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--kb-text-primary);
    margin-bottom: 2px;
}

.kb-search-result-excerpt {
    font-size: 12px;
    color: var(--kb-text-secondary);
}

/* Utilities */
.kb-hidden { display: none !important; }
.kb-no-scroll { overflow: hidden !important; }
.kb-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}