/* Tri-Netra — Professional Dashboard Styles */

:root {
    /* Primary Colors — Teal / Emerald / Gold theme */
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #14b8a6;
    --primary-subtle: #f0fdfa;
    --primary-gradient: linear-gradient(135deg, #0d9488 0%, #065f46 100%);
    --accent-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    /* Status Colors */
    --success: #10b981;
    --success-bg: #d1fae5;
    --success-gradient: linear-gradient(135deg, #0d9488 0%, #34d399 100%);
    --warning: #f59e0b;
    --warning-bg: #fef3c7;
    --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --danger: #ef4444;
    --danger-bg: #fee2e2;
    --danger-gradient: linear-gradient(135deg, #dc2626 0%, #f87171 100%);
    --info: #0ea5e9;
    --info-bg: #e0f2fe;
    --info-gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    
    /* Neutrals */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --sidebar-width: 260px;
    --topbar-height: 64px;
    
    /* Shadows - Enhanced */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, #042f2e 0%, #064e3b 50%, #0d9488 100%);
    background-attachment: fixed;
    color: var(--gray-800);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Animated background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(13, 148, 136, 0.18) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* App Shell */
.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--topbar-height) 1fr auto;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* Top Navigation Bar - Enhanced */
.topbar {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.8);
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-fast);
}

.brand:hover {
    transform: scale(1.02);
}

.brand-logo {
    width: 40px;
    height: 40px;
    color: var(--primary);
    filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.3));
}

.brand-text strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-text small {
    font-size: 11px;
    color: var(--gray-500);
    font-weight: 500;
}

.nav-search {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.nav-search .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.nav-search input {
    width: 100%;
    padding: 10px 16px 10px 42px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 14px;
    background: var(--gray-50);
    transition: all var(--transition-fast);
}

.nav-search input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.nav-search input:focus + .search-icon {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-btn {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-500);
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: var(--gray-100);
    color: var(--gray-700);
    transform: translateY(-1px);
}

.nav-btn:active {
    transform: translateY(0);
}

.nav-btn svg {
    width: 20px;
    height: 20px;
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: linear-gradient(135deg, #ef4444, #f97316);
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    margin-left: 8px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    transition: transform var(--transition-fast);
}

.user-avatar:hover {
    transform: scale(1.05);
}

/* Sidebar - Enhanced */
.sidebar {
    grid-row: 2;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(229, 231, 235, 0.8);
    padding: 20px 0;
    overflow-y: auto;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.05);
}

.sidebar-section {
    padding: 0 20px 24px;
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-400);
    margin-bottom: 12px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-fast);
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-900);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    color: var(--primary);
}

.nav-item.active::before {
    transform: scaleY(1);
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.nav-item:hover svg {
    transform: scale(1.1);
}

/* Recent List - Enhanced */
.recent-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    background: var(--gray-50);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.recent-item:hover {
    background: white;
    border-color: var(--gray-200);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.recent-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.recent-icon.tumor {
    background: linear-gradient(135deg, #ef4444, #f97316);
    color: white;
}

.recent-icon.normal {
    background: linear-gradient(135deg, #10b981, #3b82f6);
    color: white;
}

.recent-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.recent-id {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-800);
}

.recent-time {
    font-size: 11px;
    color: var(--gray-400);
}

.recent-status {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.recent-status.positive {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(249, 115, 22, 0.1));
    color: #ef4444;
}

.recent-status.negative {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
    color: #10b981;
}

/* System Status - Enhanced */
.system-status {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    background: var(--gray-50);
    transition: all var(--transition-fast);
}

.status-item:hover {
    background: var(--gray-100);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    position: relative;
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 0 3px var(--success-bg), 0 0 10px rgba(16, 185, 129, 0.5);
    animation: pulse-dot 2s infinite;
}

.status-dot.warning {
    background: var(--warning);
    box-shadow: 0 0 0 3px var(--warning-bg), 0 0 10px rgba(245, 158, 11, 0.5);
}

.status-dot.offline {
    background: var(--gray-400);
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 3px var(--success-bg), 0 0 10px rgba(16, 185, 129, 0.5); }
    50% { box-shadow: 0 0 0 5px var(--success-bg), 0 0 20px rgba(16, 185, 129, 0.8); }
}

.status-item span:nth-child(2) {
    flex: 1;
    color: var(--gray-500);
    font-weight: 500;
}

.status-value {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-700);
}

/* Main Content - Enhanced */
.main-content {
    grid-row: 2;
    padding: 32px;
    overflow-y: auto;
    background: transparent;
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

.content-section.active {
    display: block;
}

/* Section Header - Enhanced */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.section-header h1 {
    font-size: 28px;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 15px;
    color: var(--gray-500);
    margin-top: 4px;
    font-weight: 500;
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* Buttons - Enhanced */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-outline {
    background: white;
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
    font-weight: 600;
}

.btn-outline:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    width: 100%;
    justify-content: center;
}

/* Upload Grid */
.upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* Upload Card - Enhanced */
.upload-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.upload-zone {
    border: 3px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.02), rgba(124, 58, 237, 0.02));
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(124, 58, 237, 0.08));
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.upload-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    color: var(--gray-400);
    transition: all var(--transition-normal);
}

.upload-zone:hover .upload-icon,
.upload-zone.dragover .upload-icon {
    color: var(--primary);
    transform: translateY(-5px);
}

.upload-icon svg {
    width: 100%;
    height: 100%;
}

.upload-zone h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.upload-zone p {
    color: var(--gray-500);
    margin-bottom: 12px;
    font-weight: 500;
}

.file-types {
    font-size: 12px;
    color: var(--gray-400);
    font-weight: 500;
}

/* Upload Options */
.upload-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.option-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.select-input,
.text-input {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-family: var(--font-sans);
    background: white;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.select-input:focus,
.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* Preview Card - Enhanced */
.preview-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 24px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.preview-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
}

.preview-controls {
    display: flex;
    gap: 6px;
}

.control-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-500);
    transition: all var(--transition-fast);
}

.control-btn:hover {
    background: var(--primary-subtle);
    color: var(--primary);
    transform: scale(1.1);
}

.control-btn svg {
    width: 18px;
    height: 18px;
}

.preview-container {
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--gray-100), var(--gray-50));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.05);
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--gray-400);
}

.preview-placeholder svg {
    width: 64px;
    height: 64px;
    opacity: 0.5;
}

.preview-placeholder span {
    font-size: 14px;
    font-weight: 500;
}

.preview-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.preview-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding-top: 20px;
    border-top: 2px solid var(--gray-100);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-400);
}

.info-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-800);
    font-family: var(--font-mono);
}

/* Metrics Grid - Enhanced */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.metric-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 24px;
    display: flex;
    gap: 16px;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all var(--transition-fast);
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
}

.metric-card.critical::before {
    background: linear-gradient(90deg, #ef4444, #f97316);
}

.metric-card.warning::before {
    background: linear-gradient(90deg, #f59e0b, #eab308);
}

.metric-card.info::before {
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
}

.metric-card.success::before {
    background: linear-gradient(90deg, #10b981, #3b82f6);
}

.metric-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.metric-card.critical .metric-icon {
    background: linear-gradient(135deg, #ef4444, #f97316);
    color: white;
}

.metric-card.warning .metric-icon {
    background: linear-gradient(135deg, #f59e0b, #eab308);
    color: white;
}

.metric-card.info .metric-icon {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
}

.metric-card.success .metric-icon {
    background: linear-gradient(135deg, #10b981, #3b82f6);
    color: white;
}

.metric-icon svg {
    width: 28px;
    height: 28px;
}

.metric-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.metric-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value {
    font-size: 26px;
    font-weight: 800;
    color: var(--gray-900);
    margin: 4px 0;
    line-height: 1.2;
}

.metric-detail {
    font-size: 12px;
    color: var(--gray-400);
    font-weight: 500;
}

.confidence-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    margin-top: 10px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, #f59e0b, #10b981);
    border-radius: 4px;
    transition: width 1s ease;
    width: 0%;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.results-panel {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 2px solid var(--gray-100);
}

.panel-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
}

.panel-tabs,
.viz-tabs {
    display: flex;
    gap: 6px;
}

.tab-btn {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-500);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: white;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.panel-content {
    padding: 24px;
}

/* Comparison Table - Enhanced */
.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.comparison-table th {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    background: var(--gray-50);
}

.comparison-table td {
    font-size: 14px;
    font-weight: 500;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr.best {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.05));
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.positive {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(59, 130, 246, 0.15));
    color: #10b981;
}

.status-badge.negative {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(249, 115, 22, 0.15));
    color: #ef4444;
}

/* Visualization */
.viz-container {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--gray-100), var(--gray-50));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.05);
}

.viz-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Additional Analysis */
.additional-analysis {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.analysis-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 28px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.analysis-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.uncertainty-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
}

.uncertainty-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.uncertainty-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.uncertainty-value {
    font-size: 24px;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--gray-800);
}

.uncertainty-bar {
    width: 100%;
    height: 10px;
    background: var(--gray-200);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 12px;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.uncertainty-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #f59e0b, #ef4444);
    border-radius: 5px;
    transition: width 1s ease;
    width: 0%;
}

.uncertainty-note,
.robustness-note {
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.robustness-gauge {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.gauge-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: conic-gradient(var(--success) 0deg, var(--success) 0deg, var(--gray-200) 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 1s ease;
}

.gauge-circle::before {
    content: '';
    position: absolute;
    width: 75px;
    height: 75px;
    border-radius: 50%;
    background: white;
}

.gauge-value {
    position: relative;
    font-size: 24px;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--gray-800);
    z-index: 1;
}

/* Segmentation Section */
.segmentation-workspace {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.seg-controls {
    display: flex;
    gap: 24px;
    align-items: flex-end;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--gray-100);
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#thresholdSlider {
    width: 180px;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--gray-200);
    border-radius: 4px;
    outline: none;
}

#thresholdSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

#thresholdValue {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    min-width: 50px;
    text-align: center;
}

.seg-viewers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.seg-viewer {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.seg-viewer h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-700);
}

.viewer {
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--gray-100), var(--gray-50));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.05);
}

.seg-metrics {
    display: flex;
    gap: 32px;
    padding-top: 24px;
    border-top: 2px solid var(--gray-100);
    flex-wrap: wrap;
}

.seg-metric {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 24px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.seg-metric .metric-label {
    font-size: 12px;
}

.seg-metric .metric-value {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* AI Explanation Panel */
.explain-panel {
    margin-top: 24px;
    padding: 24px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.explain-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-100);
}
.explain-header h3 { margin: 0; font-size: 18px; }
.explain-backend {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    padding: 4px 10px;
    background: var(--gray-50);
    border-radius: 999px;
    color: var(--gray-600);
}
.explain-body { display: flex; flex-direction: column; gap: 20px; }
.explain-section h4 {
    margin: 0 0 6px 0;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gray-500);
}
.explain-section p { margin: 0; line-height: 1.55; color: var(--gray-800); }
.explain-findings { margin: 0; display: grid; grid-template-columns: 140px 1fr; row-gap: 6px; column-gap: 12px; }
.explain-findings dt { font-weight: 600; color: var(--gray-700); }
.explain-findings dd { margin: 0; color: var(--gray-800); line-height: 1.5; }
.explain-section ul { margin: 0; padding-left: 18px; }
.explain-section li { margin-bottom: 4px; line-height: 1.5; }
.explain-disclaimer p { font-size: 12px; color: var(--gray-500); font-style: italic; }
.explain-raw { margin-top: 8px; }
.explain-raw summary { cursor: pointer; font-size: 12px; color: var(--gray-500); }
.explain-raw pre {
    margin-top: 8px;
    padding: 12px;
    background: var(--gray-50);
    border-radius: var(--radius-md, 8px);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--gray-700);
    overflow-x: auto;
    max-height: 320px;
}

/* Layered-explanation enhancements */
.explain-header-meta { display: flex; align-items: center; gap: 10px; }
.explain-safety-badge {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.explain-safety-badge.safety-zero { background: #d1fae5; color: #065f46; }
.explain-safety-badge.safety-checked { background: #dbeafe; color: #1e3a8a; }

.explain-impression p {
    font-size: 16px;
    line-height: 1.55;
    color: var(--gray-900, var(--gray-800));
    background: linear-gradient(135deg, rgba(99,102,241,0.06), rgba(124,58,237,0.04));
    padding: 14px 16px;
    border-radius: var(--radius-md, 8px);
    border-left: 4px solid var(--primary);
}

.explain-confidence-card .confidence-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 10px;
}
.confidence-band {
    font-size: 14px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.confidence-band.conf-high { background: #d1fae5; color: #065f46; }
.confidence-band.conf-moderate { background: #fef3c7; color: #92400e; }
.confidence-band.conf-low { background: #fee2e2; color: #991b1b; }
.confidence-band.conf-very-low, .confidence-band.conf-verylow { background: #fecaca; color: #7f1d1d; }
.confidence-band.conf-unknown { background: var(--gray-100); color: var(--gray-700); }
.confidence-score { flex: 1; }
.confidence-score-value { font-size: 18px; font-weight: 700; color: var(--gray-800); margin-bottom: 4px; }
.confidence-score-bar {
    width: 100%; height: 8px;
    background: var(--gray-100);
    border-radius: 999px;
    overflow: hidden;
}
.confidence-score-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #7c3aed);
    transition: width 0.4s ease;
}
.explain-confidence-detail { font-size: 13px; color: var(--gray-700); line-height: 1.5; margin-top: 6px; }

.explain-grade {
    margin: 0; padding: 12px;
    background: var(--gray-50);
    border-radius: var(--radius-md, 8px);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.5;
    color: var(--gray-700);
    white-space: pre-wrap;
}

.differential-list { display: flex; flex-direction: column; gap: 12px; }
.differential-item {
    padding: 12px 14px;
    background: var(--gray-50);
    border-radius: var(--radius-md, 8px);
    border-left: 3px solid var(--gray-300);
}
.differential-tags { display: flex; gap: 6px; margin-bottom: 6px; flex-wrap: wrap; }
.origin-tag, .conf-tag {
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.origin-tag.tag-rule { background: #e0e7ff; color: #3730a3; }
.origin-tag.tag-llm { background: #dcfce7; color: #166534; }
.conf-tag.conf-high { background: #d1fae5; color: #065f46; }
.conf-tag.conf-moderate, .conf-tag.conf-low-to-moderate { background: #fef3c7; color: #92400e; }
.conf-tag.conf-low { background: #fee2e2; color: #991b1b; }
.conf-tag.conf-na { background: var(--gray-100); color: var(--gray-700); }
.differential-statement { font-size: 14px; line-height: 1.5; color: var(--gray-800); margin-bottom: 6px; }
.differential-citations { font-size: 11px; color: var(--gray-600); line-height: 1.6; }
.citation-chip {
    display: inline-block;
    margin: 2px 4px 2px 0;
    padding: 2px 6px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    color: var(--gray-700);
}

.claim-prop { font-size: 11px; color: var(--gray-500); font-family: 'JetBrains Mono', monospace; }
.explain-disagreements ul { padding-left: 18px; }
.explain-disagreements li { color: #92400e; }
.explain-recommendation p {
    background: rgba(34,197,94,0.06);
    padding: 12px 14px;
    border-radius: var(--radius-md, 8px);
    border-left: 3px solid #16a34a;
    margin: 0;
}

.llm-passes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}
.llm-pass-item {
    padding: 12px;
    border-radius: var(--radius-md, 8px);
    background: var(--gray-50);
    border-top: 3px solid var(--gray-300);
}
.llm-pass-item.pass-ok { border-top-color: #16a34a; }
.llm-pass-item.pass-rejected, .llm-pass-item.pass-skipped, .llm-pass-item.pass-skipped_insufficient_ram { border-top-color: #f59e0b; }
.llm-pass-item.pass-error { border-top-color: #dc2626; }
.pass-header { display: flex; align-items: center; gap: 6px; margin-bottom: 4px; }
.pass-label { font-weight: 600; font-size: 12px; color: var(--gray-800); }
.pass-model {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    padding: 1px 6px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    color: var(--gray-600);
}
.pass-status {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.pass-detail { font-size: 11px; color: var(--gray-600); line-height: 1.5; }
.pass-detail.pass-error { color: #991b1b; }
.pass-detail.pass-warn { color: #92400e; }

.explain-quality ul { padding-left: 18px; }
.explain-quality li { color: #92400e; font-size: 13px; }

/* AI Radiology Report block on the Results page (top-level surface,
   not buried under the Segmentation tab). */
.report-section {
    margin-top: 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}
.report-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 18px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border-soft);
}
.report-header h2 {
    margin: 0 0 6px 0;
    font-size: 20px;
    color: var(--text-strong);
}
.report-subtitle {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-muted);
    margin: 0;
    max-width: 640px;
}
.report-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.select-input.compact {
    padding: 8px 12px;
    font-size: 12.5px;
    min-width: 240px;
}
.report-placeholder {
    padding: 32px;
    background: var(--bg-subtle);
    border: 1px dashed var(--border-soft);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}
.report-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.report-content .explain-panel {
    margin: 0;
    padding: 0;
    border: none;
    box-shadow: none;
    background: transparent;
}

/* Inference telemetry + cascade decision cards (replace the dead
   Uncertainty + Robustness placeholders). */
.telemetry-dl {
    display: grid;
    grid-template-columns: max-content 1fr;
    row-gap: 8px;
    column-gap: 16px;
    margin: 8px 0 0 0;
}
.telemetry-dl dt {
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    font-weight: 600;
    align-self: center;
}
.telemetry-dl dd {
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    color: var(--text-strong);
    word-break: break-word;
}

/* Visualization placeholder for unavailable Grad-CAM (ONNX deploy). */
.viz-placeholder {
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 32px;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    background: var(--bg-subtle);
    border: 1px dashed var(--border-soft);
    border-radius: var(--radius-md);
    min-height: 320px;
}
.mask-suppress-banner {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.55;
}

/* Batch upload panel */
.batch-panel {
    margin-top: 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}
.batch-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-soft);
}
.batch-header h2 { margin: 0 0 4px 0; font-size: 18px; color: var(--text-strong); }
.batch-subtitle { margin: 0; font-size: 13px; color: var(--text-muted); }
.batch-actions { display: flex; gap: 8px; flex-shrink: 0; }
.batch-progress { margin-bottom: 14px; }
.batch-progress-bar {
    height: 6px;
    background: var(--bg-subtle);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 6px;
}
.batch-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #7c3aed);
    transition: width 250ms ease;
    width: 0;
}
.batch-progress-text { font-size: 12px; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
.batch-table-wrap { overflow-x: auto; }
.batch-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.batch-table thead th {
    text-align: left;
    padding: 10px 8px;
    background: var(--bg-subtle);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-soft);
    white-space: nowrap;
}
.batch-table tbody td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--border-soft);
    vertical-align: middle;
    font-variant-numeric: tabular-nums;
    color: var(--text-body);
}
.batch-table tbody tr:hover { background: var(--bg-subtle); }
.batch-diag {
    padding: 3px 10px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 11.5px;
}
.batch-diag.positive { background: #fee2e2; color: #991b1b; }
.batch-diag.negative { background: #d1fae5; color: #065f46; }
.batch-diag.mixed { background: #fef3c7; color: #92400e; }
.batch-verdict {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--bg-subtle);
    color: var(--text-strong);
}
.batch-band { font-size: 10.5px; color: var(--text-muted); margin-left: 4px; }

.explain-negative-explanation pre {
    background: #ecfdf5;
    color: #065f46;
    border-left: 4px solid #10b981;
    padding: 14px 16px;
    border-radius: var(--radius-md, 8px);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
}
.explain-vision-negative pre {
    background: #eef2ff;
    color: #312e81;
    border-left: 4px solid #6366f1;
    padding: 14px 16px;
    border-radius: var(--radius-md, 8px);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
}
.explain-vision-negative .explain-subtle {
    font-size: 12px;
    color: var(--text-muted);
    margin: 4px 0 10px 0;
    line-height: 1.5;
}

/* Loading Overlay - Enhanced */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-content {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 48px;
    text-align: center;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.loading-spinner {
    width: 72px;
    height: 72px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 28px;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.loading-content p {
    color: var(--gray-500);
    margin-bottom: 28px;
    font-weight: 500;
}

.loading-progress {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--gray-200);
    border-radius: 5px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #7c3aed, var(--primary-light));
    border-radius: 5px;
    transition: width 0.3s ease;
    width: 0%;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.5);
}

#progressText {
    font-size: 14px;
    color: var(--gray-500);
    font-family: var(--font-mono);
    font-weight: 600;
}

/* Footer - Enhanced */
.app-footer {
    grid-column: 1 / -1;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(229, 231, 235, 0.8);
    padding: 20px 24px;
    text-align: center;
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
}

.app-footer p {
    margin: 0;
}

/* Responsive */
@media (max-width: 1200px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .upload-grid {
        grid-template-columns: 1fr;
    }
    
    .additional-analysis {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-shell {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .seg-viewers {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 16px;
    }
    
    .header-actions {
        width: 100%;
    }
    
    .btn-large {
        width: 100%;
    }
}

/* Scroll animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.metric-card {
    animation: slideIn 0.5s ease forwards;
}

.metric-card:nth-child(1) { animation-delay: 0.1s; }
.metric-card:nth-child(2) { animation-delay: 0.2s; }
.metric-card:nth-child(3) { animation-delay: 0.3s; }
.metric-card:nth-child(4) { animation-delay: 0.4s; }

/* Model Comparison Section */
.model-comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.model-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 28px;
    box-shadow: var(--shadow-xl);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
}

.model-card.featured {
    border-color: var(--primary);
    position: relative;
}

.model-card.featured::before {
    content: 'Recommended';
    position: absolute;
    top: -12px;
    right: 20px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: white;
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--gray-100);
}

.model-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}

.model-badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-badge.speed {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary);
}

.model-badge.balanced {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--success);
}

.model-badge.accurate {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(236, 72, 153, 0.1));
    color: #7c3aed;
}

.model-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
}

.stat-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-800);
    font-family: var(--font-mono);
}

.model-description {
    font-size: 13px;
    color: var(--gray-500);
    line-height: 1.6;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
}

.comparison-chart {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: 28px;
    box-shadow: var(--shadow-xl);
}

.comparison-chart h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.chart-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bar-chart {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 40px;
    height: 250px;
    padding: 20px 0;
}

.chart-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.bar-fill {
    width: 80px;
    background: linear-gradient(180deg, var(--primary), #7c3aed);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 12px;
    position: relative;
    transition: all var(--transition-normal);
}

.bar-fill:hover {
    transform: scaleY(1.05);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.bar-label {
    font-size: 12px;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: auto;
    margin-bottom: 8px;
}

.bar-value {
    font-size: 18px;
    font-weight: 800;
    color: white;
    font-family: var(--font-mono);
}

.chart-legend {
    text-align: center;
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 500;
}

/* Reports Section */
.reports-filters {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.filter-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.reports-table-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-bottom: 24px;
}

.reports-table {
    width: 100%;
    border-collapse: collapse;
}

.reports-table thead {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.05));
}

.reports-table th {
    padding: 16px 20px;
    text-align: left;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    border-bottom: 2px solid var(--gray-200);
}

.reports-table td {
    padding: 16px 20px;
    font-size: 14px;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.reports-table tbody tr {
    transition: all var(--transition-fast);
}

.reports-table tbody tr:hover {
    background: var(--gray-50);
}

.reports-table tbody tr:last-child td {
    border-bottom: none;
}

.reports-table .btn-small {
    padding: 6px 14px;
    font-size: 12px;
    margin-right: 6px;
}

.reports-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.summary-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.summary-card h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.summary-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--gray-900);
    font-family: var(--font-mono);
}

.summary-value.positive {
    color: var(--danger);
}

.summary-value.negative {
    color: var(--success);
}

/* Responsive for new sections */
@media (max-width: 1200px) {
    .model-comparison-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reports-summary {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .model-comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .reports-filters {
        flex-direction: column;
    }
    
    .reports-summary {
        grid-template-columns: 1fr;
    }
    
    .reports-table-container {
        overflow-x: auto;
    }
    
    .reports-table {
        min-width: 800px;
    }
}

/* ===========================================================================
   Research-grade refresh (additive, applied after the base sheet so it wins).
   Replaces the consumer-y purple gradient background with a clean clinical
   neutral, tightens typography, professionalises sidebar widgets.
   =========================================================================== */
:root {
    --bg-base: #f4f6fb;
    --bg-elevated: #ffffff;
    --bg-subtle: #eef1f7;
    --text-strong: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --border-soft: #e2e8f0;
    --accent: #1d4ed8;
    --accent-soft: #dbeafe;
}
body {
    background: var(--bg-base);
    background-attachment: scroll;
    color: var(--text-body);
    font-feature-settings: "ss01" on, "cv01" on;
}
.topbar {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.sidebar {
    background: var(--bg-elevated);
    border-right: 1px solid var(--border-soft);
}
.main-content { background: var(--bg-base); }
.sidebar-title {
    color: var(--text-strong);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.sidebar-sublabel {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    text-transform: none;
}
.recent-empty {
    padding: 14px 12px;
    border: 1px dashed var(--border-soft);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 12.5px;
    text-align: center;
}
.system-status .status-item {
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    font-size: 12.5px;
    color: var(--text-body);
}
.system-status .status-item .status-value {
    margin-left: auto;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--text-strong);
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.status-dot.online { background: var(--success); box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.18); }
.status-dot.warning { background: var(--warning); box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15); }

/* Toast (info / error). Strictly text + chevron color, no emoji. */
.nl-toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--bg-elevated);
    color: var(--text-strong);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent);
    box-shadow: var(--shadow-lg);
    max-width: 360px;
    z-index: 1100;
    transition: opacity 220ms ease, transform 220ms ease;
}
.nl-toast-error { border-left-color: var(--danger); }
.nl-toast-success { border-left-color: var(--success); }
.nl-toast-title { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.nl-toast-desc { font-size: 12.5px; color: var(--text-body); margin: 0; line-height: 1.45; }
.nl-toast-exit { opacity: 0; transform: translateY(-6px); }

/* Print stylesheet: hide chrome, expose just the result panel.
   Lets a researcher hit Ctrl+P after running an analysis and get a clean
   one-page radiology-style report PDF via the OS print dialog. */
@media print {
    .topbar, .sidebar, .header-actions, .preview-controls,
    .panel-tabs, .viz-tabs, #batchUploadBtn, #newAnalysisBtn,
    #runSegmentationBtn, #runExplainBtn, #explainRaw,
    .loading-overlay, .nl-toast { display: none !important; }
    body, .main-content, .app-shell { background: white !important; }
    main, .results-panel, .explain-panel {
        box-shadow: none !important;
        border: 1px solid #d1d5db !important;
        page-break-inside: avoid;
    }
    .explain-impression p, .explain-recommendation p,
    .confidence-band { background: transparent !important; }
    a[href]:after { content: ""; }  /* no inline URLs cluttering printout */
}

/* ===========================================================================
   Research-grade refresh, layer 2 - distinctive hero + methodology +
   refined typography. Layered on top of the earlier neutral palette so
   everything else stays consistent.
   =========================================================================== */
:root {
    --research-ink:        #0b1220;
    --research-canvas:     #fbfbfd;
    --research-rule:       #e3e6ee;
    --research-accent:     #1d4ed8;
    --research-accent-2:   #6366f1;
    --research-accent-3:   #0f766e;
    --research-soft:       #eef2ff;
    --research-soft-2:     #e0e7ff;
    --research-grad:       linear-gradient(120deg, #6366f1 0%, #0f766e 100%);
}

body { color: var(--research-ink); }

/* --- Research hero ----------------------------------------------------- */
.research-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 36px;
    align-items: stretch;
    padding: 28px 32px;
    background: var(--bg-elevated);
    border: 1px solid var(--research-rule);
    border-radius: 20px;
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
    margin-bottom: 22px;
    position: relative;
    overflow: hidden;
}
.research-hero::before {
    /* Subtle distinctive gradient bar at the top edge. */
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--research-grad);
}
.research-hero-main { display: flex; flex-direction: column; gap: 14px; }
.research-hero-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.research-pill {
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-subtle);
    color: var(--text-muted);
    border: 1px solid var(--border-soft);
}
.research-pill.primary {
    background: var(--research-soft);
    color: var(--research-accent);
    border-color: var(--research-soft-2);
}
.research-pill.subtle { background: white; color: var(--text-muted); }
.research-title {
    font-size: 38px;
    line-height: 1.05;
    letter-spacing: -0.025em;
    margin: 0;
    color: var(--research-ink);
    font-weight: 700;
}
.research-tagline {
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--text-body);
    margin: 0;
    max-width: 60ch;
}
.research-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.btn-link { text-decoration: none; }
.research-hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    align-content: center;
}
.hero-stat {
    background: var(--bg-base);
    border: 1px solid var(--research-rule);
    border-radius: 14px;
    padding: 16px 18px;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.hero-stat:hover { transform: translateY(-2px); box-shadow: 0 8px 16px rgba(15,23,42,0.05); }
.hero-stat-value {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--research-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    line-height: 1.1;
}
.hero-stat-label {
    font-size: 12px;
    color: var(--text-strong);
    font-weight: 600;
    margin-top: 6px;
    line-height: 1.4;
}
.hero-stat-label span {
    display: block;
    font-weight: 400;
    color: var(--text-muted);
    font-size: 11.5px;
    margin-top: 2px;
}
@media (max-width: 980px) {
    .research-hero { grid-template-columns: 1fr; gap: 18px; }
    .research-hero-stats { grid-template-columns: 1fr 1fr; }
    .research-title { font-size: 30px; }
}

/* --- Methodology panel ------------------------------------------------- */
.methodology-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--research-rule);
    border-radius: 16px;
    padding: 4px 22px;
    margin-bottom: 22px;
    transition: box-shadow 0.18s ease;
}
.methodology-panel[open] { box-shadow: 0 4px 12px rgba(15,23,42,0.05); padding-bottom: 18px; }
.methodology-panel summary {
    list-style: none;
    cursor: pointer;
    padding: 16px 0;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 14px;
}
.methodology-panel summary::-webkit-details-marker { display: none; }
.methodology-panel summary > span:first-child {
    font-size: 14px;
    font-weight: 600;
    color: var(--research-ink);
    letter-spacing: 0.02em;
}
.methodology-hint {
    font-size: 12px;
    color: var(--text-muted);
}
.methodology-flow {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 6px;
}
.meth-step {
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 14px;
    padding: 12px 14px;
    background: var(--bg-base);
    border: 1px solid var(--research-rule);
    border-radius: 12px;
}
.meth-step-num {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--research-grad);
    color: white;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: 14px;
}
.meth-step-body h4 {
    margin: 0 0 4px 0;
    font-size: 13.5px;
    color: var(--research-ink);
    font-weight: 600;
}
.meth-step-body p {
    margin: 0;
    font-size: 12.5px;
    color: var(--text-body);
    line-height: 1.55;
}
.meth-arrow {
    text-align: center;
    color: var(--research-accent-2);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    opacity: 0.6;
}
.methodology-citations {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dashed var(--research-rule);
    display: flex; flex-wrap: wrap; gap: 6px;
}
.methodology-citations .citation-chip {
    background: var(--bg-subtle);
    color: var(--text-strong);
    border-color: var(--border-soft);
}
@media (min-width: 980px) {
    .methodology-flow {
        grid-template-columns: 1fr 12px 1fr 12px 1fr;
        gap: 0;
        column-gap: 8px;
        row-gap: 8px;
    }
    .methodology-flow .meth-step { padding: 14px; }
    .methodology-flow .meth-step:nth-child(7),
    .methodology-flow .meth-step:nth-child(9) {
        grid-column: 1 / -1;
    }
}

/* --- Subtle section header (used for the upload block) ----------------- */
.section-header.subtle-header {
    margin: 6px 0 14px 0;
    padding: 0;
    border: none;
    background: transparent;
}
.upload-section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--research-ink);
    margin: 0;
}

/* --- App footer (research-grade citation block) ------------------------ */
.app-footer {
    margin-top: 32px;
    padding: 28px 32px;
    background: var(--bg-elevated);
    border-top: 1px solid var(--research-rule);
    color: var(--text-body);
}
.app-footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 28px;
    margin-bottom: 16px;
}
.app-footer-col h5 {
    margin: 0 0 8px 0;
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}
.app-footer-col p {
    margin: 0;
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--text-body);
}
.app-footer-col ul { list-style: none; padding: 0; margin: 0; }
.app-footer-col li {
    font-size: 12.5px;
    color: var(--text-body);
    margin-bottom: 4px;
    line-height: 1.55;
}
.app-footer-col a {
    color: var(--research-accent);
    text-decoration: none;
    border-bottom: 1px dashed var(--research-rule);
}
.app-footer-col a:hover {
    border-bottom-color: var(--research-accent);
}
.app-footer-bottom {
    border-top: 1px solid var(--research-rule);
    padding-top: 14px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 11.5px;
    color: var(--text-muted);
}
.app-footer-cite {
    font-style: italic;
    max-width: 480px;
}
@media (max-width: 980px) {
    .app-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}


/* --- Print Styles --- */
@media print {
    body, .app-shell, .main-content {
        display: block !important;
        height: auto !important;
        overflow: visible !important;
        background: white !important;
        color: black !important;
    }
    .sidebar, .topbar, .upload-container, .research-hero, .panel-tabs, .viz-tabs, .results-grid .visualization-panel, .report-actions, .loading-overlay, .nl-toast {
        display: none !important;
    }
    #results-section, .report-section {
        display: block !important;
        box-shadow: none !important;
        border: none !important;
    }
    .report-header h2 {
        color: black !important;
    }
    .report-subtitle {
        display: none !important;
    }
    .report-content {
        color: black !important;
        font-family: Arial, sans-serif !important;
    }
    
    /* Print Header */
    .report-section::before {
        content: 'Tri-Netra AI \A Patient Diagnostic Summary';
        white-space: pre;
        display: block;
        font-size: 24px;
        font-weight: bold;
        color: #1e293b !important;
        text-align: center;
        border-bottom: 2px solid #4f46e5 !important;
        padding-bottom: 20px;
        margin-bottom: 30px;
    }
    
    /* Print Disclaimer */
    .report-section::after {
        content: 'DISCLAIMER: This report is generated by an AI-assisted analysis pipeline (Tri-Netra) and is intended for research and educational purposes only. It does not constitute a clinical diagnosis. All findings must be reviewed and validated by a qualified radiologist or clinician before any medical decision is made. \A\A Generated by Tri-Netra | Anannya Vyas | github.com/Anannya-Vyas/Tri-Netra-AI';
        white-space: pre-wrap;
        display: block;
        font-size: 10px;
        color: #666 !important;
        text-align: center;
        border-top: 1px solid #ccc !important;
        padding-top: 20px;
        margin-top: 40px;
    }
}