:root {
    --md-primary: #4CAF50;
    --md-primary-dark: #388E3C;
    --md-primary-light: #81C784;
    --md-secondary: #F44336;
    --md-secondary-dark: #D32F2F;
    --md-secondary-light: #EF5350;
    --md-accent: #FF5722;
    --md-surface: #FFFFFF;
    --md-background: #FAFAFA;
    --md-on-surface: #212121;
    --md-on-primary: #FFFFFF;
    --md-on-secondary: #FFFFFF;
    --md-outline: #E0E0E0;
    --md-shadow: rgba(0, 0, 0, 0.12);
    --md-shadow-elevation-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --md-shadow-elevation-2: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --md-shadow-elevation-3: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    --md-shadow-elevation-4: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-background);
    color: var(--md-on-surface);
    line-height: 1.6;
}

/* Material Design Cards */
.md-card {
    background: var(--md-surface);
    border-radius: 8px;
    box-shadow: var(--md-shadow-elevation-1);
    transition: box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.md-card:hover {
    box-shadow: var(--md-shadow-elevation-2);
}

.md-card-elevated {
    box-shadow: var(--md-shadow-elevation-2);
}

.md-card-elevated:hover {
    box-shadow: var(--md-shadow-elevation-3);
}

/* Material Design Buttons */
.md-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border: none;
    border-radius: 4px;
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.75px;
    cursor: pointer;
    transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.md-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: currentColor;
    opacity: 0;
    transition: opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.md-button:hover::before {
    opacity: 0.12;
}

.md-button:active::before {
    opacity: 0.24;
}

.md-button-primary {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-shadow-elevation-1);
}

.md-button-primary:hover {
    box-shadow: var(--md-shadow-elevation-2);
}

.md-button-text {
    background-color: transparent;
    color: var(--md-primary);
    box-shadow: none;
}

/* Material Design Typography */

.md-headline-5 {
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.33;
    letter-spacing: 0em;
}

.md-headline-6 {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.6;
    letter-spacing: 0.0125em;
}

.md-body-1 {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    letter-spacing: 0.00937em;
}

.md-body-2 {
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.43;
    letter-spacing: 0.01071em;
}

.md-caption {
    font-size: 0.75rem;
    font-weight: 400;
    line-height: 1.66;
    letter-spacing: 0.03333em;
}

/* Header */
.header {
    background: var(--md-surface);
    box-shadow: var(--md-shadow-elevation-1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--md-primary), var(--md-primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--md-shadow-elevation-2);
}

.logo-text h1 {
    color: var(--md-on-surface);
    margin: 0;
}

.logo-text p {
    color: #757575;
    margin: 0;
}

.status-chip {
    background: #E8F5E8;
    color: var(--md-primary-dark);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Main Layout */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .main-container {
        grid-template-columns: 1fr;
        padding: 16px;
    }
}

/* Consultation Panel */
.consultation-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.consultation-card {
    padding: 24px;
}

.consultation-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.consultation-icon {
    width: 48px;
    height: 48px;
    background: var(--md-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-primary);
}

/* Progress Bar */
.progress-section {
    margin-bottom: 24px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.progress-bar-container {
    background: #E0E0E0;
    height: 4px;
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--md-primary), var(--md-accent));
    height: 100%;
    width: 0%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Question Section */
.question-card {
    background: #F3E5F5;
    border-left: 4px solid var(--md-primary);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 24px;
}

.answer-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.answer-button {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border: 2px solid var(--md-outline);
    border-radius: 8px;
    background: var(--md-surface);
    cursor: pointer;
    transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
}

.answer-button:hover {
    border-color: var(--md-primary);
    box-shadow: var(--md-shadow-elevation-1);
}

.answer-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}

.yes-answer .answer-icon {
    background: #E8F5E8;
    color: var(--md-primary-dark);
}

.no-answer .answer-icon {
    background: #FFEBEE;
    color: var(--md-secondary-dark);
}

.maybe-answer .answer-icon {
    background: #FFF3E0;
    color: #F57C00;
}

.yes-answer:hover {
    border-color: var(--md-primary);
    background: #F1F8E9;
}

.no-answer:hover {
    border-color: var(--md-secondary);
    background: #FFEBEE;
}

.maybe-answer:hover {
    border-color: #FF9800;
    background: #FFF8E1;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    padding: 20px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.sidebar-icon {
    width: 32px;
    height: 32px;
    background: var(--md-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-primary);
    font-size: 16px;
}

/* Selected Symptoms */
.symptom-item {
    background: #E8F5E8;
    border: 1px solid var(--md-primary-light);
    border-radius: 4px;
    padding: 8px 12px;
    margin-bottom: 8px;
    font-size: 14px;
}

.symptom-code {
    font-weight: 500;
    color: var(--md-primary-dark);
}

/* Knowledge Base Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.stat-card {
    background: var(--md-surface);
    border: 1px solid var(--md-outline);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--md-primary);
    display: block;
}

.stat-label {
    font-size: 12px;
    color: #757575;
    margin-top: 4px;
}

/* Disease Database */
.disease-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.disease-item:hover {
    background: #F5F5F5;
}

.disease-icon {
    font-size: 24px;
}

.disease-info h4 {
    font-size: 14px;
    font-weight: 500;
    margin: 0;
}

.disease-info p {
    font-size: 12px;
    color: #757575;
    margin: 0;
}

/* Diagnosis Result */
.result-card {
    background: linear-gradient(135deg, var(--md-primary), var(--md-primary-dark));
    color: var(--md-on-primary);
    padding: 32px;
    border-radius: 8px;
    text-align: center;
}

.result-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.confidence-section {
    margin: 24px 0;
}

.confidence-bar {
    background: rgba(255, 255, 255, 0.3);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin: 8px 0;
}

.confidence-fill {
    background: var(--md-on-primary);
    height: 100%;
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.treatment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

@media (max-width: 768px) {
    .treatment-grid {
        grid-template-columns: 1fr;
    }
}

.treatment-section {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 16px;
    text-align: left;
}

.treatment-section h5 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 16px;
}

.treatment-list {
    list-style: none;
}

.treatment-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.4;
}

/* Inference Trace */
.trace-item {
    background: var(--md-surface);
    border-left: 4px solid var(--md-primary);
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 0 4px 4px 0;
}

.trace-step {
    font-weight: 500;
    color: var(--md-primary);
    font-size: 12px;
}

.trace-message {
    font-size: 14px;
    margin-top: 4px;
}

.trace-time {
    font-size: 11px;
    color: #757575;
    margin-top: 4px;
}

/* Footer */
.footer {
    background: var(--md-surface);
    border-top: 1px solid var(--md-outline);
    margin-top: 48px;
    padding: 32px 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.footer-section h4 {
    color: var(--md-on-surface);
    margin-bottom: 16px;
}

.footer-section p {
    color: #757575;
    line-height: 1.6;
}

.tech-list {
    list-style: none;
}

.tech-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    color: #757575;
}

.tech-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.footer-copyright {
    text-align: center;
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--md-outline);
    color: #757575;
    font-size: 14px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.material-icons {
    font-family: 'Material Icons';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

    .ripple {
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.3);
        transform: scale(0);
        animation: ripple-animation 0.6s linear;
        pointer-events: none;
    }

    @keyframes ripple-animation {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }
    /* Tambahkan ke style.css */

/* Header Actions untuk dark mode toggle */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Dark Mode Toggle Button */
.dark-mode-toggle {
    border-radius: 50% !important;
    width: 48px;
    height: 48px;
    padding: 0 !important;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode-toggle:hover {
    background: rgba(0, 0, 0, 0.08);
    transform: scale(1.05);
}

.dark-mode-toggle .material-icons {
    font-size: 20px;
    color: var(--md-on-surface);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode-toggle:hover .material-icons {
    transform: rotate(180deg);
}

/* Dark theme adjustments untuk toggle */
.dark-theme .dark-mode-toggle {
    background: rgba(255, 255, 255, 0.08);
}

.dark-theme .dark-mode-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
}

.dark-theme .dark-mode-toggle .material-icons {
    color: #E0E0E0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .header-actions {
        gap: 8px;
    }
    
    .dark-mode-toggle {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }
    
    .dark-mode-toggle .material-icons {
        font-size: 18px;
    }
    
    .status-chip {
        font-size: 10px;
        padding: 2px 8px;
    }
}

/* Enhanced dark theme variables */
.dark-theme {
    --md-background: #121212;
    --md-surface: #1E1E1E;
    --md-on-surface: #E0E0E0;
    --md-outline: #333333;
    --md-primary: #81C784; /* Slightly lighter green for better contrast */
    --md-primary-dark: #4CAF50;
}

/* Dark theme enhancements */
.dark-theme .header {
    background: var(--md-surface);
    border-bottom: 1px solid var(--md-outline);
}

.dark-theme .footer {
    background: var(--md-surface);
    border-top: 1px solid var(--md-outline);
}

.dark-theme .footer-copyright {
    border-top: 1px solid var(--md-outline);
}

.dark-theme .symptom-item {
    background: rgba(129, 199, 132, 0.15);
    border-color: rgba(129, 199, 132, 0.3);
    color: var(--md-on-surface);
}

.dark-theme .disease-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.dark-theme .trace-item {
    background: var(--md-surface);
    border-left-color: var(--md-primary);
}

/* Smooth transition for theme changes */
body, .md-card, .header, .footer, .answer-button, .symptom-item, .stat-card, .disease-item, .trace-item {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}


    .dark-theme .md-card {
        background: var(--md-surface);
        color: var(--md-on-surface);
    }

    .dark-theme .question-card {
        background: #2D2D2D;
        color: var(--md-on-surface);
    }

    .dark-theme .answer-button {
        background: var(--md-surface);
        color: var(--md-on-surface);
        border-color: var(--md-outline);
    }

    .dark-theme .stat-card {
        background: var(--md-surface);
        border-color: var(--md-outline);
    }

    /* Keyboard navigation styles */
    .keyboard-navigation *:focus {
        outline: 2px solid var(--md-primary) !important;
        outline-offset: 2px !important;
    }

    /* High contrast mode support */
    @media (prefers-contrast: high) {
        :root {
            --md-outline: #000000;
            --md-shadow: rgba(0, 0, 0, 0.5);
        }
        
        .md-card {
            border: 2px solid var(--md-outline);
        }
    }

    /* Reduced motion support */
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
        
        .ripple {
            display: none;
        }
    }

    /* Print optimizations */
    @media print {
        .header, .footer, .sidebar {
            display: none;
        }
        
        .main-container {
            grid-template-columns: 1fr;
            max-width: 100%;
        }
        
        .md-card {
            box-shadow: none;
            border: 1px solid #ccc;
            break-inside: avoid;
            margin-bottom: 1rem;
        }
        
        .result-card {
            background: #f5f5f5 !important;
            color: #333 !important;
        }
    }

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

    /* Enhanced focus indicators */
    .answer-button:focus {
        outline: 3px solid var(--md-primary);
        outline-offset: 2px;
    }

    /* Improved touch targets for mobile */
    @media (max-width: 768px) {
        .md-button {
            min-height: 48px;
            padding: 12px 24px;
        }
        
        .answer-button {
            min-height: 64px;
            padding: 16px;
        }
        
        .sidebar-icon, .consultation-icon {
            width: 40px;
            height: 40px;
        }
    }

    /* Smooth transitions */
    * {
        transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    /* Tambahkan CSS ini ke style.css */

/* Inference Trace Collapsible */
.inference-header {
    padding: 24px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s ease;
    border-radius: 8px 8px 0 0;
}

.inference-header:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.dark-theme .inference-header:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.consultation-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 0; /* Reset margin untuk header di dalam collapsible */
}

.collapse-toggle {
    background: none;
    border: none;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--md-on-surface);
    min-width: 40px;
    height: 40px;
}

.collapse-toggle:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.dark-theme .collapse-toggle:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.collapse-toggle .material-icons {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 24px;
}

.collapse-toggle.expanded .material-icons {
    transform: rotate(180deg);
}

/* Inference Content */
.inference-content {
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    border-top: 1px solid var(--md-outline);
    overflow: hidden;
}

.inference-content.collapsed {
    max-height: 0;
    opacity: 0;
    border-top: none;
    overflow: hidden;
}

.inference-content.expanded {
    max-height: none; /* Remove height restriction */
    opacity: 1;
    overflow: visible; /* Allow scrolling */
    max-height: 80vh; /* Set reasonable max height for large content */
}

.inference-content #trace-content {
    padding: 0 24px 24px 24px;
    max-height: 60vh; /* Limit height for scrollable area */
    overflow-y: auto; /* Enable vertical scrolling */
    overflow-x: hidden; /* Hide horizontal scroll */
}

/* Custom scrollbar styling */
.inference-content #trace-content::-webkit-scrollbar {
    width: 6px;
}

.inference-content #trace-content::-webkit-scrollbar-track {
    background: var(--md-outline);
    border-radius: 3px;
}

.inference-content #trace-content::-webkit-scrollbar-thumb {
    background: var(--md-primary);
    border-radius: 3px;
}

.inference-content #trace-content::-webkit-scrollbar-thumb:hover {
    background: var(--md-primary-dark);
}

/* Dark theme scrollbar */
.dark-theme .inference-content #trace-content::-webkit-scrollbar-track {
    background: #333333;
}

.dark-theme .inference-content #trace-content::-webkit-scrollbar-thumb {
    background: var(--md-primary);
}

/* Enhanced trace items untuk collapsed state */
.trace-item {
    background: var(--md-surface);
    border-left: 4px solid var(--md-primary);
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 0 4px 4px 0;
    transition: all 0.2s ease;
}

.trace-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
    transform: translateX(2px);
}

.dark-theme .trace-item {
    background: #2A2A2A;
}

.dark-theme .trace-item:hover {
    background-color: #333333;
}

/* Indicator untuk collapsed state */
.inference-trace-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: rgba(156, 39, 176, 0.1);
    border-top: 1px solid rgba(156, 39, 176, 0.2);
    font-size: 14px;
    color: #9C27B0;
    border-radius: 0 0 8px 8px;
}

.inference-trace-indicator .material-icons {
    font-size: 16px;
}

/* Animation untuk smooth expand/collapse */
@keyframes expandContent {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.inference-content.expanded #trace-content {
    animation: expandContent 0.3s ease-out;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .inference-header {
        padding: 16px;
    }
    
    .inference-content #trace-content {
        padding: 0 16px 16px 16px;
        max-height: 50vh; /* Smaller height on mobile */
    }
    
    .collapse-toggle {
        min-width: 36px;
        height: 36px;
    }
    
    .collapse-toggle .material-icons {
        font-size: 20px;
    }
}

/* Focus states untuk accessibility */
.collapse-toggle:focus {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

/* Improved keyboard navigation */
.inference-header:focus-within {
    background-color: rgba(76, 175, 80, 0.08);
}

.dark-theme .inference-header:focus-within {
    background-color: rgba(129, 199, 132, 0.08);
}