:root {
    /* Uena Vibrant Warm Orange Theme Palette */
    --app-accent: #FF702A;
    --app-accent-hover: #E65A15;
    --app-accent-light: #FFF2EB;
    --app-accent-rgb: 255, 112, 42;
    --app-on-accent: #FFFFFF;
    --app-focus: rgba(255, 112, 42, 0.4);

    /* Clean Canvas & Card Surfaces */
    --app-canvas: #F7F8FC;
    --app-surface: #FFFFFF;
    --app-surface-muted: #F8F9FA;
    --app-text: #2D3748;
    --app-text-muted: #718096;
    --app-border: #EDF2F7;

    /* Clean White Sidebar with Orange Active Accents */
    --app-sidebar: #FFFFFF;
    --app-sidebar-border: #ECEEF2;
    --app-sidebar-text: #2D3748;
    --app-sidebar-muted: #7E8299;
    --app-sidebar-active: #FF702A;
    --app-sidebar-active-bg: #FFF2EB;

    /* Semantic Alerts */
    --app-success: #10B981;
    --app-warning: #F59E0B;
    --app-danger: #EF4444;
    --app-info: #3B82F6;
    --app-warning-soft: #FFFBEB;
    --app-warning-border: #FDE68A;

    /* Rounded Geometry & Soft Shadows (Uena Dashboard Style) */
    --app-radius-sm: 0.5rem;
    --app-radius-md: 0.85rem;
    --app-radius-lg: 1.15rem;
    --app-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --app-shadow-md: 0 6px 20px rgba(0, 0, 0, 0.05);
    --app-shadow-orange: 0 4px 14px rgba(255, 112, 42, 0.28);

    /* Bootstrap 5 Overrides */
    --bs-primary: #FF702A;
    --bs-primary-rgb: 255, 112, 42;
    --bs-primary-text-emphasis: #C2410C;
    --bs-primary-bg-subtle: #FFF2EB;
    --bs-primary-border-subtle: #FED7AA;
    --bs-link-color: #FF702A;
    --bs-link-hover-color: #E65A15;
    --bs-border-radius: 0.65rem;
    --bs-border-radius-sm: 0.45rem;
    --bs-border-radius-lg: 0.95rem;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--app-text);
    background: var(--app-canvas);
    -webkit-font-smoothing: antialiased;
}

a, .btn-link {
    color: var(--app-accent);
    text-decoration: none;
    transition: color 150ms ease;
}
a:hover, .btn-link:hover {
    color: var(--app-accent-hover);
}

/* Primary Button Styling */
.btn-primary {
    color: var(--app-on-accent) !important;
    background: linear-gradient(135deg, #FF702A 0%, #FF5A14 100%) !important;
    border-color: #FF702A !important;
    border-radius: var(--app-radius-sm);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(255, 112, 42, 0.25);
    transition: all 160ms ease-out;
}
.btn-primary:hover, .btn-primary:active, .btn-primary:focus {
    background: linear-gradient(135deg, #E65A15 0%, #D84D0B 100%) !important;
    border-color: #E65A15 !important;
    box-shadow: 0 6px 16px rgba(255, 112, 42, 0.35);
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: #FF702A !important;
    border-color: #FF702A !important;
    border-radius: var(--app-radius-sm);
    font-weight: 600;
}
.btn-outline-primary:hover {
    background-color: #FF702A !important;
    border-color: #FF702A !important;
    color: #FFFFFF !important;
    box-shadow: 0 4px 12px rgba(255, 112, 42, 0.22);
}

.btn-outline-warning {
    color: #FF702A !important;
    border-color: #FED7AA !important;
    background-color: #FFF9F5;
    border-radius: var(--app-radius-sm);
    font-weight: 600;
}
.btn-outline-warning:hover {
    background-color: #FF702A !important;
    border-color: #FF702A !important;
    color: #FFFFFF !important;
}

.btn:focus-visible, .btn-link:focus-visible, .form-control:focus, .form-select:focus, .form-check-input:focus {
    outline: 2px solid var(--app-focus);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(255, 112, 42, 0.15) !important;
    border-color: #FF702A !important;
}

/* Cards & Containers (Uena Dashboard Style) */
.card {
    background: #FFFFFF;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-md);
    box-shadow: var(--app-shadow-sm);
    transition: box-shadow 180ms ease;
}
.card:hover {
    box-shadow: var(--app-shadow-md);
}

.card-header {
    background: #FFFFFF;
    border-bottom: 1px solid var(--app-border);
    font-weight: 700;
    color: #2D3748;
    padding: 1rem 1.25rem;
}
.card-footer {
    background: #FFFFFF;
    border-top: 1px solid var(--app-border);
}

.form-control, .form-select {
    border-color: #E2E8F0;
    border-radius: var(--app-radius-sm);
    background-color: #FFFFFF;
}

/* Tables (Uena Style with Orange Thead Accent) */
.table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: #F8FAFC;
    margin-bottom: 0;
}

.table thead th {
    background: linear-gradient(90deg, #FF702A 0%, #FF7F3B 100%) !important;
    color: #FFFFFF !important;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: none !important;
    padding: 0.85rem 1rem;
}

.table-responsive {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--app-border);
}

.table tbody td {
    padding: 0.85rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #F0F2F6;
    color: #4A5568;
    font-size: 0.88rem;
}

.table-hover tbody tr:hover {
    background-color: #FFF9F5 !important;
}

/* Badges (Uena Rounded Pill Style) */
.badge {
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.4em 0.8em;
}
.badge.text-bg-primary, .badge.bg-primary {
    background-color: #FFF0E6 !important;
    color: #FF702A !important;
    border: 1px solid rgba(255, 112, 42, 0.3) !important;
}
.badge.text-bg-success, .badge.bg-success {
    background-color: #E8F8F0 !important;
    color: #10B981 !important;
    border: 1px solid rgba(16, 185, 129, 0.3) !important;
}
.badge.text-bg-warning, .badge.bg-warning {
    background-color: #FFF8E6 !important;
    color: #D97706 !important;
    border: 1px solid rgba(245, 158, 11, 0.3) !important;
}
.badge.text-bg-danger, .badge.bg-danger {
    background-color: #FEECEC !important;
    color: #EF4444 !important;
    border: 1px solid rgba(239, 68, 68, 0.3) !important;
}
.badge.text-bg-secondary, .badge.bg-secondary {
    background-color: #F3F4F6 !important;
    color: #4B5563 !important;
    border: 1px solid #E5E7EB !important;
}

/* Nav Pills (Upload Tabs) */
.upload-mode-tabs .nav-link {
    color: #718096;
    font-weight: 600;
    border-radius: 999px;
    padding: 0.5rem 1.25rem;
    transition: all 160ms ease-out;
}
.upload-mode-tabs .nav-link:hover {
    color: #FF702A;
    background-color: #FFF5F0;
}
.upload-mode-tabs .nav-link.active {
    color: #FFFFFF !important;
    background: linear-gradient(135deg, #FF702A 0%, #FF5A14 100%) !important;
    box-shadow: 0 4px 12px rgba(255, 112, 42, 0.28);
}

/* Progress Bar */
.progress-bar {
    background: linear-gradient(90deg, #FF702A 0%, #FF8547 100%) !important;
}

/* Pagination Styling (Uena Orange Theme) */
.pagination {
    gap: 0.25rem;
}
.page-link {
    color: var(--app-text);
    background-color: #FFFFFF;
    border: 1px solid var(--app-border);
    border-radius: 8px !important;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 150ms ease;
    cursor: pointer;
}
.page-link:hover:not(:disabled) {
    color: var(--app-accent);
    background-color: var(--app-accent-light);
    border-color: #FED7AA;
}
.page-item.active .page-link {
    color: #FFFFFF !important;
    background: linear-gradient(135deg, #FF702A 0%, #FF5A14 100%) !important;
    border-color: #FF702A !important;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 112, 42, 0.3);
}
.page-item.disabled .page-link, .page-link:disabled {
    color: #A0AEC0;
    background-color: #F8F9FA;
    border-color: var(--app-border);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Desktop navigation rail */
@media (min-width: 641px) {
    .page .sidebar {
        transition: width 180ms ease-out, flex-basis 180ms ease-out;
    }

    .page:has(#sidebar-collapse:checked) .sidebar {
        width: 4.75rem;
        flex-basis: 4.75rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .page .sidebar { transition: none; }
}

/* Pathology analysis metrics (Uena cards) */
.pathology-analysis-page {
    background: var(--app-canvas);
    min-height: calc(100vh - 2rem);
}

.pathology-analysis-metric {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem 1.15rem;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-md);
    background: #FFFFFF;
    box-shadow: var(--app-shadow-sm);
}

.pathology-analysis-metric strong {
    font-size: 1.65rem;
    line-height: 1.1;
    color: #FF702A;
}

.pathology-distribution-row + .pathology-distribution-row {
    margin-top: 0.85rem;
}

.pathology-analysis-evidence td small {
    display: block;
    margin-top: 0.2rem;
    color: #718096;
}

.pathology-analysis-evidence td {
    min-width: 8rem;
}

/* Markdown Rendering Styles */
.markdown-content {
    line-height: 1.6;
    color: #333;
}
.markdown-content pre {
    background-color: #2b2b2b;
    color: #f8f8f2;
    padding: 12px;
    border-radius: 8px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    overflow-x: auto;
}
.markdown-content code {
    background-color: #FFF2EB;
    padding: 2px 6px;
    border-radius: 4px;
    color: #FF702A;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}
.markdown-content pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
}
.markdown-content table {
    width: 100%;
    margin-bottom: 1rem;
    color: #212529;
    border-collapse: collapse;
    border: 1px solid #dee2e6;
}
.markdown-content th, .markdown-content td {
    padding: 0.75rem;
    vertical-align: top;
    border: 1px solid #dee2e6;
}
.markdown-content thead th {
    vertical-align: bottom;
    border-bottom: 2px solid #dee2e6;
    background-color: #FFF2EB;
    color: #FF702A;
}
.markdown-content tbody tr:nth-of-type(odd) {
    background-color: rgba(0,0,0,.02);
}

.chat-bubble {
    border-radius: 12px;
}