:root {
    --primary-color: #3b82f6;
    --secondary-color: #1d4ed8;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #f8fafc;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #334155;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-color: #334155;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    overflow-x: hidden;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.sidebar.collapsed {
    transform: translateX(-280px);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--sidebar-hover);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-header .logo {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.sidebar-header h3 {
    font-weight: 600;
    margin: 0;
    color: white;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section h6 {
    color: #94a3b8;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 1.5rem;
    margin-bottom: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: var(--sidebar-hover);
    color: white;
    border-left-color: var(--primary-color);
}

.nav-item.active {
    background-color: var(--sidebar-hover);
    color: white;
    border-left-color: var(--primary-color);
}

.nav-item i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    margin-left: 280px;
    transition: margin-left 0.3s ease;
    min-height: 100vh;
}

.main-content.expanded {
    margin-left: 0;
}

.content-container {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.page-header h2 {
    font-weight: 600;
    color: var(--text-color);
}

.page-header p {
    color: var(--text-muted);
    margin-bottom: 0;
}

/* Cards */
.config-card, .search-box, .results-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

.config-card:hover, .results-card:hover {
    box-shadow: var(--shadow-md);
}

/* Embedding Selector */
.embedding-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.embedding-option {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-radius: 8px;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.embedding-option:hover {
    border-color: var(--primary-color);
    background: white;
    transform: translateY(-2px);
}

.embedding-option.selected {
    border-color: var(--primary-color);
    background: #eff6ff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.embedding-icon {
    font-size: 1.5rem;
    margin-right: 1rem;
}

.embedding-openai {
    color: var(--success-color);
}

.embedding-local {
    color: var(--accent-color);
}

.embedding-details {
    flex: 1;
}

.embedding-name {
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

.embedding-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: block;
}

/* Search Box */
.search-box-container {
    margin-bottom: 2rem;
}

.search-box {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.search-input-container {
    display: flex;
    align-items: center;
    background: var(--background-color);
    border-radius: 10px;
    padding: 0.5rem;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.search-input-container:focus-within {
    border-color: var(--primary-color);
}

.search-icon {
    color: var(--text-muted);
    margin: 0 1rem;
    font-size: 1.25rem;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 1rem;
    font-size: 1.1rem;
    color: var(--text-color);
    outline: none;
}

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

.search-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-button:hover {
    background: var(--secondary-color);
}

/* Suggestions Box */
.suggestions-box {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: none;
}

.suggestions-box.show {
    display: block;
}

.suggestion-item {
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.suggestion-item:hover {
    background: white;
}

/* Results */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.results-grid {
    display: grid;
    gap: 1.5rem;
}

.result-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.result-score {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.result-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    padding-right: 80px;
}

.file-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
}

.file-info h5 {
    margin: 0;
    font-weight: 600;
}

.file-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.result-content {
    margin: 1rem 0;
    line-height: 1.6;
    color: var(--text-color);
}

.result-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.embedding-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-openai {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-local {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-color);
}

.highlight {
    background-color: rgba(251, 191, 36, 0.2);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.status-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: 3rem;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-280px);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .main-content.expanded {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .content-container {
        padding: 1rem;
    }
    
    .embedding-selector {
        grid-template-columns: 1fr;
    }
    
    .search-input-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-input {
        width: 100%;
    }
    
    .search-button {
        width: 100%;
    }
}