/* styles.css */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* ===== CONTAINER AND LAYOUT ===== */
.container-fluid {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    min-height: 100vh;
    padding: 0;
}

/* ===== HEADER STYLES ===== */
.header-bar {
    background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
    padding: 0.75rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.moreinfo {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.moreinfo:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  text-decoration: none;
}

/* ===== TITLE AND HERO SECTION ===== */
.title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: #2d3748;
    text-align: center;
    margin: 2rem 0;
    background: linear-gradient(135deg, #4a5568, #667eea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.about-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: #4a5568;
    text-align: center;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.para {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #4a5568;
    text-align: justify;
    margin-bottom: 2rem;
    padding: 0 1rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== NAVIGATION BUTTONS ===== */
.table-container,
.table-container2 {
    width: 100%;
    margin: 2rem 0;
    display: flex;
    justify-content: center;
}

.table-container table,
.table-container2 table {
    border-collapse: separate;
    border-spacing: 1rem;
    width: 100%;
    max-width: 1200px;
}

.btn-section {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    border: none;
    cursor: pointer;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.btn-section:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
    text-decoration: none;
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.btn-section:active {
    transform: translateY(-1px);
}

/* ===== SECTION STYLES ===== */
.section-heading {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: #2d3748;
    margin: 3rem auto 1rem auto;
    text-align: center;
    position: relative;
    max-width: 1200px;
}

.section-heading::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

.section-description {
    font-size: 1.1rem;
    color: #718096;
    text-align: center;
    margin: 0 auto 2rem auto;
    max-width: 800px;
    padding: 0 1rem;
}

.main-section {
    margin: 2rem auto;
    max-width: 1400px;
    padding: 0 1rem;
}

.border-line {
    height: 2px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    margin: 4rem auto;
    border-radius: 1px;
    opacity: 0.3;
    max-width: 1200px;
    width: 80%;
}

/* ===== TABS STYLING ===== */
.tabs {
    margin: 2rem auto;
    max-width: 1200px;
    width: 100%;
}

.tab-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin: 1rem auto;
    max-width: 1200px;
    width: 100%;
}

/* Override Dash tab styles */
._dash-undo-redo {
    display: none;
}

.dash-tab {
    background: #f7fafc !important;
    border: 2px solid #e2e8f0 !important;
    border-radius: 8px 8px 0 0 !important;
    color: #4a5568 !important;
    font-weight: 600 !important;
    padding: 1rem 2rem !important;
    margin-right: 0.5rem !important;
    transition: all 0.3s ease !important;
    min-width: 120px !important;
    text-align: center !important;
}

.dash-tab:hover {
    background: #edf2f7 !important;
    border-color: #cbd5e0 !important;
}

.dash-tab--selected {
    background: linear-gradient(135deg, #667eea, #764ba2) !important;
    color: white !important;
    border-color: #667eea !important;
}

/* Tab container centering */
.dash-tabs-container {
    display: flex !important;
    justify-content: center !important;
    margin: 0 auto !important;
    max-width: 1200px !important;
}

.dash-tabs {
    display: flex !important;
    justify-content: center !important;
    flex-wrap: wrap !important;
}

/* Tab content styling */
.dash-tab-content {
    background: white !important;
    border-radius: 0 12px 12px 12px !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1) !important;
    padding: 2rem !important;
    margin: 0 auto !important;
    max-width: 1200px !important;
    border: 2px solid #e2e8f0 !important;
    border-top: none !important;
}

/* ===== FORM CONTROLS ===== */
.select-label {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
    margin-top: 1.5rem;
    font-size: 1rem;
    display: block;
}

.select-input {
    margin-bottom: 1.5rem;
}

/* Container for form sections */
.form-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 1200px;
    border: 1px solid #e2e8f0;
}

/* Spacing for sections */
.section-spacing {
    margin: 3rem auto;
    max-width: 1200px;
    padding: 0 1rem;
}

/* Dropdown styling */
.Select-control {
    border: 2px solid #e2e8f0 !important;
    border-radius: 8px !important;
    box-shadow: none !important;
    transition: all 0.3s ease !important;
    min-height: 45px !important;
}

.Select-control:hover {
    border-color: #cbd5e0 !important;
}

.Select-control.is-focused {
    border-color: #667eea !important;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1) !important;
}

.Select-placeholder {
    color: #a0aec0 !important;
    font-size: 0.95rem !important;
}

.Select-value-label {
    color: #2d3748 !important;
    font-weight: 500 !important;
}

/* Radio button styling */
.form-check-input {
    width: 1.2rem;
    height: 1.2rem;
    margin-right: 0.5rem;
    border: 2px solid #e2e8f0;
    background-color: white;
}

.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}

.form-check-label {
    font-weight: 500;
    color: #4a5568;
    margin-right: 1.5rem;
}

/* ===== HORIZONTAL RADIO BUTTONS ===== */
.radio-horizontal {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    gap: 1rem !important;
    align-items: center !important;
    margin: 0.5rem 0 1rem 0 !important;
}

.radio-horizontal .form-check {
    display: flex !important;
    align-items: center !important;
    margin: 0 !important;
    padding: 0 !important;
    min-width: auto !important;
}

.radio-horizontal .form-check-input {
    margin: 0 0.5rem 0 0 !important;
    position: static !important;
}

.radio-horizontal .form-check-label {
    margin: 0 !important;
    padding: 0.25rem 0.75rem !important;
    background: rgba(102, 126, 234, 0.1) !important;
    border-radius: 20px !important;
    transition: all 0.3s ease !important;
    white-space: nowrap !important;
}

.radio-horizontal .form-check-input:checked + .form-check-label {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
}

.radio-horizontal .form-check-label:hover {
    background: rgba(102, 126, 234, 0.2) !important;
}

/* ===== PLOT CONTAINERS ===== */
.outer-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 2rem auto;
    padding: 2rem;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    max-width: 1200px;
    width: 100%;
    overflow: visible; /* Allow inner containers to handle their own overflow */
}

.outer-container:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* Regular scatter plot containers - horizontal scroll only */
.scatter-container {
    background: #f7fafc;
    border-radius: 12px;
    padding: 1rem;
    margin: 1rem auto;
    border: 1px solid #e2e8f0;
    width: 100%;
    max-width: 100%;
    overflow-x: auto; /* Horizontal scrolling for wide plots */
    overflow-y: hidden; /* No vertical scrolling */
    min-height: 400px; /* Minimum height for content */
    max-height: 600px; /* Maximum height to prevent excessive vertical space */
    display: flex;
    align-items: center;
    justify-content: flex-start;
    position: relative;
}

/* Top metabolites scatter containers - horizontal scroll with more height */
.scatter-container-top {
    background: #f7fafc;
    border-radius: 12px;
    padding: 1rem;
    margin: 1rem auto;
    border: 1px solid #e2e8f0;
    width: 100%;
    max-width: 100%;
    overflow-x: auto; /* Horizontal scrolling for wide plots */
    overflow-y: hidden; /* No vertical scrolling */
    min-height: 500px; /* More height for top metabolites plots */
    max-height: 800px; /* Allow more vertical space */
    display: flex;
    align-items: center;
    justify-content: flex-start;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

/* Heatmap containers - both horizontal and vertical scrolling */
.scatter-container-heat {
    background: #f7fafc;
    border-radius: 12px;
    padding: 1rem;
    margin: 1rem auto;
    border: 1px solid #e2e8f0;
    width: 100%;
    max-width: 100%;
    min-height: 600px; /* Minimum height for heatmaps */
    max-height: 85vh; /* Use most of viewport height */
    height: auto; /* Let content determine height up to max */
    overflow: auto; /* Enable both horizontal and vertical scrolling */
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
    display: block; /* Block display for proper scrolling */
}

/* Hover effects for all containers */
.scatter-container:hover,
.scatter-container-top:hover,
.scatter-container-heat:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Enhanced scrollbar styling for all plot containers */
.scatter-container::-webkit-scrollbar,
.scatter-container-top::-webkit-scrollbar,
.scatter-container-heat::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

.scatter-container::-webkit-scrollbar-track,
.scatter-container-top::-webkit-scrollbar-track,
.scatter-container-heat::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    margin: 2px;
}

.scatter-container::-webkit-scrollbar-thumb,
.scatter-container-top::-webkit-scrollbar-thumb,
.scatter-container-heat::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 8px;
    border: 2px solid #f1f5f9;
    transition: all 0.3s ease;
}

.scatter-container::-webkit-scrollbar-thumb:hover,
.scatter-container-top::-webkit-scrollbar-thumb:hover,
.scatter-container-heat::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
    border-color: #e2e8f0;
    transform: scale(1.1);
}

.scatter-container::-webkit-scrollbar-corner,
.scatter-container-top::-webkit-scrollbar-corner,
.scatter-container-heat::-webkit-scrollbar-corner {
    background: transparent;
}

/* Horizontal-only scrollbar styling for scatter containers */
.scatter-container::-webkit-scrollbar:vertical {
    width: 0px; /* Hide vertical scrollbar */
}

.scatter-container-top::-webkit-scrollbar:vertical {
    width: 0px; /* Hide vertical scrollbar */
}

/* Heatmap plot specific styling */
.gmm-scatter-top-plot {
    min-width: 800px;
    height: auto;
}

.gmm-heatmap-plot {
    min-width: 800px;
    height: auto;
}

/* Loading state for heatmap */
.scatter-container-heat .dash-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

/* Responsive plot container */
.plot-container {
    overflow: auto;
    width: 100%;
    height: 100%;
}

/* ===== LOADING STYLES ===== */
.dash-spinner {
    border-color: #667eea !important;
}

/* ===== CENTRALIZED LOADING WRAPPER ===== */
.loading-wrapper {
    position: relative;
    width: 100%;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.loading-wrapper._dash-loading {
    background: rgba(247, 250, 252, 0.98);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.loading-wrapper ._dash-loading-callback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    background: white;
    border-radius: 50%;
    padding: 1rem;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-wrapper ._dash-loading-callback .dash-spinner {
    width: 40px !important;
    height: 40px !important;
    border: 3px solid rgba(102, 126, 234, 0.2) !important;
    border-top: 3px solid #667eea !important;
    border-radius: 50% !important;
    animation: spin 1s linear infinite !important;
}

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

/* Loading overlay for better UX */
.loading-wrapper._dash-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(102, 126, 234, 0.05) 0%, 
        rgba(118, 75, 162, 0.05) 100%);
    border-radius: 12px;
    z-index: 1;
    animation: pulse 2s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.3; }
    100% { opacity: 0.7; }
}

/* Specific loading styles for different components */
.loading-wrapper.heatmap-loading {
    min-height: 500px;
    max-height: 80vh;
}

.loading-wrapper.dropdown-loading {
    min-height: 60px;
    background: rgba(247, 250, 252, 0.8);
    border-radius: 8px;
    margin: 0.25rem 0;
}

.loading-wrapper.dropdown-loading ._dash-loading-callback {
    background: rgba(255, 255, 255, 0.9);
    padding: 0.5rem;
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.15);
}

.loading-wrapper.dropdown-loading ._dash-loading-callback .dash-spinner {
    width: 25px !important;
    height: 25px !important;
    border-width: 2px !important;
}

.loading-wrapper.dropdown-loading._dash-loading::after {
    content: 'Updating options...';
    font-size: 0.8rem;
    bottom: 10px;
    padding: 0.25rem 0.75rem;
}

.loading-wrapper.heatmap-loading ._dash-loading-callback {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border: 2px solid rgba(102, 126, 234, 0.2);
}

/* Enhanced loading states with smooth transitions */
.loading-wrapper:not(._dash-loading) {
    opacity: 1;
    transform: scale(1);
}

.loading-wrapper._dash-loading {
    opacity: 0.8;
    transform: scale(0.98);
}

/* Loading text indicator (optional) */
.loading-wrapper._dash-loading::after {
    content: 'Loading...';
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #667eea;
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 101;
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.1);
}

/* Responsive loading styles */
@media (max-width: 768px) {
    .loading-wrapper {
        min-height: 150px;
    }
    
    .loading-wrapper.heatmap-loading {
        min-height: 300px;
        max-height: 60vh;
    }
    
    .loading-wrapper ._dash-loading-callback .dash-spinner {
        width: 30px !important;
        height: 30px !important;
        border-width: 2px !important;
    }
    
    .loading-wrapper._dash-loading::after {
        font-size: 0.8rem;
        padding: 0.25rem 0.75rem;
        bottom: 15px;
    }
}

/* ===== FOOTER STYLES ===== */
.footer {
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: white;
    padding: 3rem 0 1rem 0;
    margin-top: 4rem;
}

.footer-mega-menu {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.menu-section h2 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.menu-section ul {
    list-style: none;
    padding: 0;
}

.menu-section li {
    margin-bottom: 0.75rem;
}

.menu-section a {
    color: #cbd5e0;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    display: block;
}

.menu-section a:hover {
    color: #667eea;
    transform: translateX(5px);
    text-decoration: none;
}

.copyright {
    text-align: center;
    color: #a0aec0;
    font-size: 0.9rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
}

/* ===== POPUP STYLES ===== */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    z-index: 10000;
    backdrop-filter: blur(5px);
}

.popup-overlay:target {
    display: flex;
    align-items: center;
    justify-content: center;
}

.popup {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    max-width: 90%;
    max-height: 90%;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    animation: popupSlideIn 0.3s ease-out;
}

@keyframes popupSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.popup h2 {
    color: #2d3748;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.popup .content {
    color: #4a5568;
    line-height: 1.8;
    font-size: 1rem;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    color: #a0aec0;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
}

.close:hover {
    color: #e53e3e;
    transform: scale(1.1);
    text-decoration: none;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .container-fluid {
        padding: 0 1rem;
    }
}

@media (max-width: 992px) {
    .table-container table,
    .table-container2 table {
        border-spacing: 0.5rem;
    }
    
    .btn-section {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
        min-height: 70px;
    }
    
    .outer-container {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .title {
        font-size: 2rem;
        margin: 1.5rem 0;
    }
    
    .para {
        font-size: 1rem;
        padding: 0 0.5rem;
    }
    
    .table-container table,
    .table-container2 table {
        border-spacing: 0.25rem;
    }
    
    .table-container td,
    .table-container2 td {
    display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .btn-section {
        padding: 1rem;
        font-size: 0.85rem;
        min-height: 60px;
    }
    
    .outer-container {
        padding: 1rem;
        margin: 1rem 0;
    }
    
    .popup {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .footer-mega-menu {
        padding: 0 1rem;
    }
    
    /* Adjust containers for mobile */
    .scatter-container {
        min-height: 300px;
        max-height: 50vh;
        padding: 0.5rem;
    }
    
    .scatter-container-top {
        min-height: 350px;
        max-height: 60vh;
        padding: 0.5rem;
    }
    
    .scatter-container-heat {
        min-height: 400px; /* Smaller minimum height on mobile */
        max-height: 70vh; /* Smaller max height on mobile */
        padding: 0.5rem;
    }
    
    .scatter-container::-webkit-scrollbar,
    .scatter-container-top::-webkit-scrollbar,
    .scatter-container-heat::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    
    .scatter-container::-webkit-scrollbar-thumb,
    .scatter-container-top::-webkit-scrollbar-thumb,
    .scatter-container-heat::-webkit-scrollbar-thumb {
        border-width: 1px;
    }
}

@media (max-width: 576px) {
    .header-bar {
        padding: 0.5rem 0;
    }
    
    .moreinfo {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .section-heading {
        font-size: 1.5rem;
    }
    
    .btn-section {
        padding: 0.8rem;
        font-size: 0.8rem;
        min-height: 50px;
    }
    
    .tab-content {
        padding: 1rem;
    }
    
    .outer-container {
        padding: 0.75rem;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
button:focus,
a:focus,
.Select-control.is-focused,
.form-check-input:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ===== ANIMATION CLASSES ===== */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== ENHANCED INTERACTIVE ELEMENTS ===== */
.interactive-card {
    transition: all 0.3s ease;
    cursor: pointer;
}

.interactive-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
}

/* ===== LOADING STATES ===== */
.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.loading-spinner {
    text-align: center;
    color: white;
}

.loading-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

.btn-section.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.btn-section.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ===== ENHANCED FORM STYLING ===== */
.form-control:focus,
.form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* ===== ENHANCED ACCESSIBILITY ===== */
.visually-hidden-focusable:not(:focus):not(:focus-within) {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --bs-body-bg: #1a202c;
        --bs-body-color: #e2e8f0;
    }
    
    .outer-container {
        background: #2d3748;
        border-color: #4a5568;
        color: #e2e8f0;
    }
    
    .scatter-container,
    .scatter-container-heat,
    .scatter-container-top {
        background: #1a202c;
        border-color: #4a5568;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .header-bar,
    .footer,
    .btn-section {
        display: none !important;
    }
    
    .outer-container {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    * {
        background: white !important;
        color: black !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    .btn-section {
        border: 2px solid #000;
        background: #000;
        color: #fff;
    }
    
    .btn-section:hover {
        background: #fff;
        color: #000;
    }
}

/* ===== REDUCED MOTION SUPPORT ===== */
@media (prefers-reduced-motion: reduce) {
    .btn-section,
    .outer-container,
    .popup,
    .moreinfo {
        transition: none !important;
        animation: none !important;
    }
    
    .fade-in,
    .slide-up {
        animation: none !important;
    }
}