/* CSS Variables & Global Settings */
:root {
    --bg-app: #080b11;
    --bg-sidebar: #0f131a;
    --bg-card: rgba(18, 24, 38, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    
    --color-primary: #7c3aed;
    --color-primary-light: #9f67ff;
    --color-secondary: #2563eb;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    --gradient-purple: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --gradient-blue: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
    --gradient-green: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-orange: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
}

/* App Container Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    font-size: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--color-primary-light);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.menu-item {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 500;
    text-align: left;
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition-smooth);
    width: 100%;
}

.menu-item i {
    font-size: 18px;
    width: 20px;
}

.menu-item:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05);
}

.menu-item.active {
    color: #fff;
    background: var(--gradient-primary);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.35);
}

.sidebar-footer {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.sidebar-footer p {
    font-size: 13px;
    font-weight: 500;
}

.sidebar-footer small {
    font-size: 11px;
    display: block;
    margin-top: 4px;
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    overflow-y: auto;
    max-height: 100vh;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title h1 {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 40%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-title p {
    color: var(--text-muted);
    font-size: 15px;
    margin-top: 4px;
}

.date-badge {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: var(--border-radius-md);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Tab Management */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.metric-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

.metric-card:hover {
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.15);
}

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

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

.metric-value {
    font-size: 28px;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

/* Colors and Gradients */
.bg-gradient-purple { background: var(--gradient-purple); }
.bg-gradient-blue { background: var(--gradient-blue); }
.bg-gradient-green { background: var(--gradient-green); }
.bg-gradient-orange { background: var(--gradient-orange); }

.text-blue { color: var(--color-secondary); }
.text-purple { color: var(--color-primary-light); }
.text-yellow { color: var(--color-warning); }
.text-red { color: var(--color-danger); }

/* Dashboard Grids */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-premium);
}

.grid-card.col-2 {
    grid-column: span 2;
}

.grid-card.h-full {
    height: 100%;
}

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

.card-header h4 {
    font-size: 18px;
    font-weight: 600;
}

.card-tag {
    font-size: 11px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    border-radius: 6px;
    color: var(--text-muted);
}

.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

.chart-container-pie {
    position: relative;
    height: 250px;
    display: flex;
    justify-content: center;
    width: 100%;
}

/* Insights List */
.insights-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.insight-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-md);
}

.insight-icon {
    font-size: 18px;
    margin-top: 2px;
}

.insight-text {
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--text-main);
}

.insight-text strong {
    font-weight: 600;
    color: #fff;
}

/* EDA Page Navigation & Layout */
.eda-navigation {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 16px 24px;
    border-radius: var(--border-radius-lg);
}

.eda-navigation label {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
}

.styled-select {
    background-color: rgba(255, 255, 255, 0.09); /* Brighter for better visibility */
    border: 1px solid rgba(255, 255, 255, 0.2);  /* Brighter border */
    color: #ffffff;                               /* Pure white text */
    padding: 12px 18px;                           /* More padding for premium touch */
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;                             /* Semi-bold text */
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    width: 100%;
}

.styled-select:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--color-primary-light);
}

.styled-select:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 12px rgba(159, 103, 255, 0.4);
    background-color: #121826;
}

/* Explicit styling for select dropdown option lists to prevent black-on-black or gray-on-gray issues */
.styled-select option {
    background-color: #121826 !important;        /* Solid opaque dark blue/slate */
    color: #ffffff !important;                   /* High-contrast pure white text */
    padding: 12px;
    font-weight: 500;
}

.eda-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-premium);
}

.eda-question-content {
    display: none;
    flex-direction: column;
    gap: 20px;
    animation: fadeIn 0.4s ease;
}

.eda-question-content.active {
    display: flex;
}

.eda-question-content h3 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.3;
}

.eda-question-content .description {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.6;
}

.viz-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 10px;
}

.viz-pane {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.viz-pane h5 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chart-box {
    position: relative;
    height: 300px;
    width: 100%;
}

.seaborn-image {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.data-insight-box {
    background: linear-gradient(90deg, rgba(124, 58, 237, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
    border-left: 4px solid var(--color-primary);
    padding: 20px;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    margin-top: 10px;
}

.data-insight-box h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary-light);
}

.data-insight-box p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-main);
}

/* Split Layout for ML pages */
.split-layout {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
}

.panel-left, .panel-right {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Segment Profiles */
.segment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.segment-card {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.segment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-primary);
}

.segment-card:nth-child(2)::before { background-color: var(--color-secondary); }
.segment-card:nth-child(3)::before { background-color: var(--color-success); }
.segment-card:nth-child(4)::before { background-color: var(--color-warning); }

.segment-card h4 {
    font-size: 16px;
    font-weight: 600;
}

.segment-desc {
    font-size: 12.5px;
    color: var(--text-muted);
    line-height: 1.5;
    flex-grow: 1;
}

.segment-stats {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 10px;
    margin-top: 4px;
}

.segment-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.segment-stat span {
    color: var(--text-muted);
}

.segment-stat strong {
    color: #fff;
}

.plot-box {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.full-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Forms & Simulator Styles */
.simulator-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-premium);
}

.simulator-card h4 {
    margin-bottom: 8px;
}

.info-text {
    font-size: 13.5px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.inline-form {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    margin-bottom: 20px;
}

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

.form-group label {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 10px 14px;
    border-radius: var(--border-radius-md);
    outline: none;
    font-family: inherit;
    font-size: 14px;
    transition: var(--transition-smooth);
}

.form-group input:focus {
    border-color: var(--color-primary);
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
    padding: 11px 20px;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-smooth);
    flex-shrink: 0;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.result-box {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--border-radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: slideDown 0.3s ease;
}

.result-box.hidden {
    display: none !important;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-header span {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.result-header h4 {
    font-size: 16px;
    color: var(--color-success);
}

#result-segment-desc {
    font-size: 13px;
    line-height: 1.5;
}

/* Full Prediction Form Layout */
.prediction-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-group.col {
    width: 50%;
}

.btn-submit {
    background: var(--gradient-primary);
    border: none;
    color: white;
    padding: 14px;
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

/* Outputs Panel */
.outputs-panel h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.outputs-grid {
    display: flex;
    gap: 20px;
}

.output-badge {
    flex-grow: 1;
    border-radius: var(--border-radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    box-shadow: var(--shadow-premium);
}

.output-badge .label {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    opacity: 0.8;
    margin-bottom: 8px;
}

.output-badge h3 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 4px;
}

.output-badge .unit {
    font-size: 11px;
    opacity: 0.7;
}

/* Model Coefficients Right Column */
.description-small {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
}

.model-metrics-box {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 16px;
}

.model-metrics-box h5 {
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.metrics-row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 14px;
}

.sub-metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 8px;
    flex-grow: 1;
    text-align: center;
}

.metric-lbl {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.metric-val {
    font-size: 13px;
    font-weight: 700;
}

.data-science-tip {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    background-color: rgba(37, 99, 235, 0.05);
    border: 1px dashed rgba(37, 99, 235, 0.2);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 11px;
    line-height: 1.5;
}

.data-science-tip i {
    font-size: 14px;
    color: var(--color-secondary);
    margin-top: 2px;
}

.data-science-tip span {
    color: var(--text-main);
}

.coefficients-explorer {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.coefficients-explorer h5 {
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.weights-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 8px;
}

/* Custom Scrollbar */
.weights-list::-webkit-scrollbar {
    width: 4px;
}

.weights-list::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.01);
}

.weights-list::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.weight-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.03);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12.5px;
}

.weight-name {
    font-weight: 500;
}

.weight-value {
    font-family: monospace;
    font-weight: 600;
}

.weight-value.positive { color: var(--color-success); }
.weight-value.negative { color: var(--color-danger); }

/* Premium Tables */
.table-container {
    overflow-x: auto;
    width: 100%;
}

.premium-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}

.premium-table th {
    background-color: rgba(255, 255, 255, 0.03);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 600;
    padding: 12px;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}

.premium-table td {
    border-bottom: 1px solid var(--border-color);
    padding: 12px;
    color: var(--text-main);
}

.premium-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.01);
}

/* Responsiveness adjustments */
@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 24px;
        flex-direction: row;
        align-items: center;
        gap: 20px;
    }
    
    .sidebar-header {
        margin-bottom: 0;
    }
    
    .sidebar-menu {
        flex-direction: row;
        gap: 8px;
    }
    
    .sidebar-footer {
        display: none;
    }
    
    .main-content {
        padding: 24px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-card.col-2 {
        grid-column: span 1;
    }
    
    .viz-split {
        grid-template-columns: 1fr;
    }
    
    .split-layout {
        grid-template-columns: 1fr;
    }
}

/* Single visual pane styles */
.viz-single {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
}

.viz-single img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}