:root {
    /* Light theme variables */
    --bg-primary: #FAFAFA;
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --border-color: #E5E7EB;
    --form-bg: #fff;
    --form-disabled: #F3F4F6;
    --placeholder-color: #9CA3AF;
    --navbar-bg: #FAFAFA;
    --card-bg: #fff;
    --hover-bg: #F3F4F6;
    --dropdown-bg: #fff;
    --alert-bg: #fff;
    --footer-bg: #f8f9fa;
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --text-primary: #E5E7EB;
    --text-secondary: #9CA3AF;
    --border-color: #374151;
    --form-bg: #1a1a1a;
    --form-disabled: #374151;
    --placeholder-color: #6B7280;
    --navbar-bg: #000000;
    --card-bg: #1a1a1a;
    --hover-bg: #2d2d2d;
    --dropdown-bg: #1a1a1a;
    --alert-bg: #1a1a1a;
    --btn-trending-bg: #1a1a1a;
    --btn-trending-border: #374151;
    --btn-trending-hover: #2d2d2d;
    --count-bg: #2d2d2d;
    --count-color: #E5E7EB;
    --footer-bg: #000000;
}

/* Add Bootstrap Dark Mode Overrides */
[data-theme="dark"] {
    color: var(--text-primary) !important;
}

[data-theme="dark"] body {
    background-color: var(--bg-primary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] main,
[data-theme="dark"] .container {
    background-color: transparent !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6,
[data-theme="dark"] p,
[data-theme="dark"] span,
[data-theme="dark"] div,
[data-theme="dark"] label,
[data-theme="dark"] .navbar-brand,
[data-theme="dark"] .results-heading {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-muted,
[data-theme="dark"] .text-secondary,
[data-theme="dark"] small,
[data-theme="dark"] .form-text,
[data-theme="dark"] .pdf-meta,
[data-theme="dark"] .citation-content {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .navbar {
    background-color: var(--navbar-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--dropdown-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--hover-bg) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .btn {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .btn-primary {
    color: #ffffff !important;
}

[data-theme="dark"] .search-input {
    color: var(--text-primary) !important;
    background-color: var(--form-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .search-input::placeholder {
    color: var(--placeholder-color) !important;
}

[data-theme="dark"] .form-control[type="file"]::-webkit-file-upload-button {
    background-color: var(--hover-bg) !important;
    color: var(--text-primary) !important;
}

/* Typography */
html, body {
    min-height: 100vh;
    background-color: var(--bg-primary);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

main {
    background-color: var(--bg-primary);
}

.container {
    background-color: var(--bg-primary);
}

/* Form Elements */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--form-bg);
    transition: all 0.2s ease;
}

.form-control::placeholder {
    color: var(--placeholder-color);
}

.form-control:disabled {
    background-color: var(--form-disabled);
    cursor: not-allowed;
}

.form-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.375rem;
}

textarea.form-control {
    min-height: 100px;
}

/* Custom File Input */
.form-control[type="file"] {
    padding: 0.5rem;
    line-height: 1.4;
}

.form-control[type="file"]::-webkit-file-upload-button {
    padding: 0.375rem 0.75rem;
    margin: -0.5rem 1rem -0.5rem -0.5rem;
    border: 0;
    border-radius: 8px;
    background-color: #F3F4F6;
    color: #4B5563;
    font-weight: 500;
    transition: all 0.2s ease;
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
    background-color: #E5E7EB;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.btn-outline-danger {
    border: 2px solid #EF4444;
    color: #EF4444;
    background: transparent;
}

.btn-outline-danger:hover {
    background-color: #EF4444;
    border-color: #EF4444;
    color: white;
}

/* Search Form */
.search-container {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

.search-container::before,
.search-container::after {
    display: none;
}

.search-form {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
}

.search-input {
    border: 2px solid #E5E7EB;
    border-radius: 100px !important;
    padding: 0 6.5rem 0 1.5rem !important;
    height: 56px !important;
    font-size: 1.1rem !important;
    transition: all 0.2s ease;
    background: white;
    width: 100%;
    line-height: 1.2 !important;
}

.search-input::placeholder {
    color: #9CA3AF;
    opacity: 0.8;
}

.search-button {
    position: absolute !important;
    right: 6px;
    margin: 0 !important;
    border-radius: 100px !important;
    padding: 0 1.5rem !important;
    font-weight: 500 !important;
    transition: all 0.2s ease !important;
    height: 44px;
    min-width: 100px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem !important;
}

.search-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.search-button:active {
    transform: translateY(0) scale(0.98);
}

.search-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Mobile Responsive Search */
@media (max-width: 768px) {
    .search-container {
        padding: 0 1rem;
    }

    .search-input {
        height: 50px !important;
        font-size: 1rem !important;
        padding: 0 5.5rem 0 1.25rem !important;
    }

    .search-button {
        height: 38px;
        min-width: 80px;
        padding: 0 1.25rem !important;
        font-size: 0.95rem !important;
        right: 6px;
    }
}

@media (max-width: 480px) {
    .search-input {
        height: 46px !important;
        font-size: 0.95rem !important;
        padding: 0 4.5rem 0 1.25rem !important;
    }

    .search-button {
        height: 34px;
        min-width: 70px;
        padding: 0 1rem !important;
        font-size: 0.9rem !important;
        right: 6px;
    }

    .search-container {
        padding: 0 0.75rem;
    }
}

/* Results Heading */
.results-heading {
    font-size: 1.5rem;
    color: #374151;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background-color: #F3F4F6;
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
}

[data-theme="dark"] .results-heading {
    background-color: var(--form-bg) !important;
    color: var(--text-primary) !important;
}

/* Alert Styling */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.25rem;
    font-weight: 500;
}

.alert-success {
    background-color: #ECFDF5;
    color: #065F46;
}

.alert-danger {
    background-color: #FEF2F2;
    color: #991B1B;
}

/* Results Page */
.result-card {
    border: 2px solid #E5E7EB;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    background-color: white;
    transition: all 0.3s ease;
}

/* Result Actions */
.result-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #E5E7EB;
}

.result-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 2px solid #E5E7EB;
}

.result-action-btn i {
    font-size: 1rem;
}

/* PDF Result Styles */
.pdf-result {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.pdf-thumbnail {
    width: 100px;
    height: 140px;
    background: #F3F4F6;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid #E5E7EB;
}

.pdf-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pdf-content {
    flex: 1;
}

.pdf-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1F2937;
}

.pdf-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #6B7280;
}

.pdf-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pdf-meta i {
    font-size: 1rem;
}

/* Share Button */
.share-button {
    white-space: nowrap;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    text-decoration: none;
}

.share-button svg {
    width: 16px;
    height: 16px;
    transition: all 0.2s ease;
}

.share-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: white;
    border: 2px solid #E5E7EB;
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 200px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 100;
}

.share-button:hover .share-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.share-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    color: #4B5563;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.share-option:hover {
    background: #F3F4F6;
}

.share-option i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* Mobile Responsive Adjustments */
@media (max-width: 640px) {
    .pdf-result {
        flex-direction: column;
    }

    .pdf-thumbnail {
        width: 80px;
        height: 112px;
    }

    .result-actions {
        flex-wrap: wrap;
    }

    .result-action-btn {
        flex: 1;
        justify-content: center;
    }
}

/* Markdown Content Styling */
.result-content {
    font-size: 1.1rem;
    line-height: 1.6;
}

.result-content h1,
.result-content h2,
.result-content h3,
.result-content h4,
.result-content h5,
.result-content h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

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

.result-content ul,
.result-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.result-content code {
    background-color: #F3F4F6;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.result-content pre {
    background-color: #F3F4F6;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.result-content blockquote {
    border-left: 4px solid #E5E7EB;
    padding-left: 1rem;
    margin-left: 0;
    color: #6B7280;
}

/* Inline Citations */
.citation-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: #F3F4F6;
    border: 2px solid #E5E7EB;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    margin: 0 2px;
    transition: all 0.2s ease;
    vertical-align: super;
    font-size: 0.75rem;
}

[data-theme="dark"] .citation-link {
    background-color: var(--form-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

.citation-link:hover {
    text-decoration: none;
    color: white !important;
}

[data-theme="dark"] .citation-link:hover {
    background-color: var(--hover-bg) !important;
}

/* Citations */
.citations {
    border-top: 2px solid #E5E7EB;
    padding-top: 1.5rem;
    margin-top: 2rem;
}

[data-theme="dark"] .citations {
    border-color: var(--border-color) !important;
}

.citations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.citation-pill {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: #F9FAFB;
    border: 2px solid #E5E7EB;
    border-radius: 100px;
    padding: 0.5rem 1rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.citation-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    background-color: #F3F4F6;
    border: 2px solid #E5E7EB;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
}

[data-theme="dark"] .citation-number {
    background-color: var(--form-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

.citation-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #4B5563;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.citation-favicon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Admin Page */
.admin-form {
    max-width: 800px;
    margin: 0 auto;
}

.admin-card {
    border: 2px solid #E5E7EB;
    border-radius: 12px;
    padding: 2rem;
    background-color: white;
}

/* Admin Form Button */
.admin-card .search-button {
    position: relative !important;
    right: auto;
    margin-top: 1rem !important;
    width: 100%;
    max-width: 200px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
}

/* Admin Tabs */
.nav-tabs {
    border-bottom: 2px solid #E5E7EB;
}

.nav-tabs .nav-link {
    border: none;
    color: #6B7280;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    margin-bottom: -2px;
    transition: all 0.2s ease;
}

/* Mobile Responsive Admin */
@media (max-width: 768px) {
    .admin-card {
        padding: 1.5rem;
    }

    .admin-card .search-button {
        max-width: 100%;
    }
}

/* Custom Elements */
.navbar {
    background-color: var(--navbar-bg);
    padding: 1rem 2rem;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
}

.container {
    padding: 5px !important;
    background-color: transparent;
}

.navbar > .container {
    width: 100%;
    max-width: none;
    padding: 0;
    background-color: transparent;
}

.nav-link {
    font-weight: 500;
}

/* Navbar Toggle Button */
.navbar-toggler {
    border: none;
    padding: 0;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        --bs-gutter-x: 1rem;
        padding: 0;
        width: 100%;
    }
    
    .navbar {
        padding: 1rem;
    }
    
    .search-container,
    .result-container {
        padding: 0 1rem;
        margin: 0 auto;
        width: 100%;
        box-sizing: border-box;
    }
    
    .search-form,
    .search-input {
        width: 100%;
        box-sizing: border-box;
    }
    
    .result-card {
        padding: 1rem;
        margin: 0 0 1rem 0;
        width: 100%;
        box-sizing: border-box;
    }
}

/* Main layout styles */
html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto;
}

footer {
    flex-shrink: 0;
    background-color: var(--footer-bg);
    width: 100%;
    border-top: 1px solid var(--border-color);
}

/* Ad Containers */
.ad-container {
    text-align: center;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-container > * {
    margin: 0 auto;
}

/* Header Layout */
.header-container {
    width: 100%;
    padding: 0 2rem;
}

/* Result Container */
.result-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

/* Mobile styles for results heading and share button */
@media (max-width: 768px) {
    .results-heading {
        font-size: 1.25rem;
        margin-right: 0.5rem;
    }

    .share-button {
        padding: 0.375rem 0.75rem;
        font-size: 0.813rem;
    }
}

@media (max-width: 480px) {
    .d-flex.justify-content-between.align-items-start.mb-4 {
        flex-direction: column;
        gap: 1rem;
    }

    .results-heading {
        margin-bottom: 0;
    }

    .share-button {
        align-self: flex-start;
    }
}

/* Dark mode toggle */
.theme-toggle {
    background: none;
    border: none;
    padding: 0.5rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.theme-toggle:hover {
    color: var(--text-secondary);
}

.theme-toggle i {
    font-size: 1.25rem;
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--hover-bg) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .card,
[data-theme="dark"] .admin-card,
[data-theme="dark"] .result-card {
    background-color: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .alert {
    background-color: var(--alert-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .modal-content {
    background-color: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .table {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .table td,
[data-theme="dark"] .table th {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .citation-pill,
[data-theme="dark"] .share-button,
[data-theme="dark"] .result-action-btn {
    background-color: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .citation-pill:hover,
[data-theme="dark"] .share-button:hover,
[data-theme="dark"] .result-action-btn:hover {
    background-color: var(--hover-bg) !important;
}

[data-theme="dark"] code,
[data-theme="dark"] pre {
    background-color: var(--form-bg) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] footer {
    background-color: var(--navbar-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .btn-trending {
    background-color: var(--btn-trending-bg) !important;
    border-color: var(--btn-trending-border) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .btn-trending:hover {
    background-color: var(--btn-trending-hover) !important;
    border-color: var(--btn-trending-border) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .btn-trending.active {
    background-color: var(--btn-trending-hover) !important;
    border-color: var(--text-primary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .count {
    background-color: var(--count-bg) !important;
    color: var(--count-color) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .btn-trending .count {
    background-color: var(--count-bg) !important;
    color: var(--count-color) !important;
    border-color: var(--border-color) !important;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
    font-family: 'Urbanist', sans-serif;
    font-weight: 600;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}