/* Design System Variables */
:root {
    --bg-app: #0b0f19;
    --bg-panel: rgba(17, 24, 39, 0.7);
    --bg-card: rgba(30, 41, 59, 0.45);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(0, 242, 254, 0.4);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Brand & Accent Colors */
    --color-primary: #00f2fe;
    --color-primary-rgb: 0, 242, 254;
    --color-secondary: #4facfe;
    --color-muscle: #00e676;
    --color-muscle-rgb: 0, 230, 118;
    --color-bite: #ff1744;
    --color-bite-rgb: 255, 23, 68;
    --color-joint-left: #d500f9;
    --color-joint-right: #2979ff;
    
    /* Layout */
    --header-height: 70px;
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
    --box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.light-mode {
    --bg-app: #f0f4f9;
    --bg-panel: rgba(255, 255, 255, 0.75);
    --bg-card: rgba(255, 255, 255, 0.9);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-focus: rgba(79, 172, 254, 0.5);
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #0284c7;
    --color-secondary: #2563eb;
    
    --box-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.05);
}

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

html, body {
    height: 100%;
    font-family: var(--font-sans);
    background-color: var(--bg-app);
    color: var(--text-primary);
    overflow-x: hidden;
    scroll-behavior: smooth;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
.light-mode ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

p {
    line-height: 1.6;
    color: var(--text-secondary);
}

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

/* App Header */
.app-header {
    height: var(--header-height);
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.header-icon {
    font-size: 1.8rem;
    color: var(--color-primary);
    text-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.3);
}

.jaw-icon-fallback {
    font-style: normal;
}

.brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.brand .badge {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #0b0f19;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
}

.brand p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Interactive Dashboard Flex Layout */
.app-workspace {
    display: flex;
    flex-direction: row;
    height: calc(100vh - var(--header-height));
    min-height: 600px;
    background-color: var(--bg-app);
    width: 100%;
    overflow: hidden;
}

.panel-controls {
    width: 360px;
    flex-shrink: 0;
}

.panel-viewport {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.panel-results {
    width: 420px;
    flex-shrink: 0;
}

/* General Panel Styles */
.panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.panel-header {
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
}

.panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Control Panel Inputs styling */
.panel-controls {
    border-right: 1px solid var(--border-color);
}

.control-group {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.control-group:hover, .control-group[open] {
    border-color: rgba(var(--color-primary-rgb), 0.25);
}

.control-group summary {
    padding: 1rem;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}

.control-group summary::-webkit-details-marker {
    display: none;
}

.control-group summary::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    margin-left: auto;
    transition: transform var(--transition-fast);
}

.control-group[open] summary::after {
    transform: rotate(180deg);
}

.control-inputs {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.input-row label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.unit {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    -webkit-appearance: none;
}

.light-mode input[type="range"] {
    background: rgba(0, 0, 0, 0.1);
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.5);
    transition: transform var(--transition-fast);
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.value-display {
    min-width: 32px;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Custom form elements */
.form-select {
    width: 100%;
    padding: 0.6rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.light-mode .form-select {
    background: white;
}

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

.coordinates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.coordinates-grid div {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.coordinates-grid label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.form-number {
    width: 100%;
    padding: 0.5rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-align: center;
    outline: none;
    -moz-appearance: textfield;
}

.light-mode .form-number {
    background: white;
}

.form-number::-webkit-outer-spin-button,
.form-number::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

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

.hint-text {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.hidden {
    display: none !important;
}

/* Muscle Accordion List styling */
.muscle-item-config {
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    background: rgba(0, 0, 0, 0.15);
    margin-bottom: 0.8rem;
    overflow: hidden;
}

.muscle-header-row {
    padding: 0.75rem 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}

.muscle-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.muscle-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-muscle);
    display: inline-block;
}

.muscle-header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.muscle-details-toggle {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.muscle-item-config.open .muscle-details-toggle {
    transform: rotate(180deg);
}

.muscle-body {
    padding: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: none;
    flex-direction: column;
    gap: 1rem;
}

.muscle-item-config.open .muscle-body {
    display: flex;
}

/* Switch UI Component */
.switch {
    position: relative;
    display: inline-block;
    width: 34px;
    height: 20px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-switch {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .3s;
    border-radius: 20px;
}

.slider-switch:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider-switch {
    background-color: var(--color-muscle);
}

input:checked + .slider-switch:before {
    transform: translateX(14px);
}

/* 3D Viewport Panel */
.panel-viewport {
    flex: 1;
    border-right: 1px solid var(--border-color);
}

.camera-presets {
    display: flex;
    gap: 0.4rem;
}

.viewport-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#threejs-container {
    width: 100%;
    height: 100%;
}

.viewport-overlay {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.legend-card {
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius-md);
    width: fit-content;
    pointer-events: auto;
    box-shadow: var(--box-shadow);
}

.legend-card h4 {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.legend-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.legend-card li {
    font-size: 0.78rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.legend-color {
    display: inline-block;
    width: 12px;
    height: 4px;
    border-radius: 2px;
}

.muscle-color { background-color: var(--color-muscle); }
.bite-color { background-color: var(--color-bite); }
.joint-left-color { background-color: var(--color-joint-left); }
.joint-right-color { background-color: var(--color-joint-right); }

.interaction-help {
    align-self: center;
    background: rgba(11, 15, 25, 0.6);
    backdrop-filter: blur(5px);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Tabs Header for Right Panel */
.tab-header {
    display: flex;
    padding: 0;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 1.2rem;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.01);
}

.tab-content {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
}

.tab-content.active {
    display: flex;
}

/* KPI Cards Layout */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.kpi-card.highlight {
    background: rgba(var(--color-bite-rgb), 0.05);
    border-color: rgba(var(--color-bite-rgb), 0.35);
    grid-column: span 2;
    box-shadow: 0 0 15px rgba(var(--color-bite-rgb), 0.08);
}

.kpi-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.kpi-card.highlight .kpi-label {
    color: rgba(255, 255, 255, 0.8);
}

.kpi-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.kpi-card.highlight .kpi-value {
    font-size: 2.2rem;
    color: var(--color-bite);
    text-shadow: 0 0 15px rgba(var(--color-bite-rgb), 0.2);
}

.kpi-unit {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.kpi-subtext {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.joint-forces-grid {
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
}

.joint-card {
    border-left: 3px solid;
}
.joint-forces-grid div:first-child {
    border-left-color: var(--color-joint-left);
}
.joint-forces-grid div:last-child {
    border-left-color: var(--color-joint-right);
}

/* Muscle chart contribution representation */
.results-section {
    border-top: 1px solid var(--border-color);
    padding-top: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.results-section h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.muscle-chart {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.chart-bar-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.chart-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
}

.chart-bar-name {
    color: var(--text-secondary);
}

.chart-bar-val {
    font-family: var(--font-mono);
    font-weight: 500;
}

.chart-bar-outer {
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.light-mode .chart-bar-outer {
    background: rgba(0, 0, 0, 0.05);
}

.chart-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, var(--color-muscle), var(--color-primary));
    border-radius: 4px;
    width: 0%;
    transition: width var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

.total-input-force {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.total-input-force strong {
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* Warnings layout */
.warnings-container {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.alert-box {
    padding: 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.82rem;
    display: flex;
    gap: 0.75rem;
    line-height: 1.5;
}

.alert-box.note {
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: rgba(0, 242, 254, 0.9);
}

.alert-box.note i {
    color: var(--color-primary);
}

.alert-box.warning {
    background: rgba(255, 145, 0, 0.05);
    border: 1px solid rgba(255, 145, 0, 0.25);
    color: rgba(255, 145, 0, 0.9);
}

.alert-box.danger {
    background: rgba(255, 23, 68, 0.05);
    border: 1px solid rgba(255, 23, 68, 0.2);
    color: rgba(255, 23, 68, 0.9);
}

/* Calculation Steps Design (Tab 2) */
.math-intro-card {
    background: rgba(0, 242, 254, 0.04);
    border-left: 3px solid var(--color-primary);
    padding: 1rem;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.calculation-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
    position: relative;
}

.step-num {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #0b0f19;
    font-weight: 800;
    font-size: 0.78rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.5);
}

.step-card h4 {
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.step-card p {
    font-size: 0.8rem;
    margin-bottom: 0.8rem;
}

.math-render-area {
    background: rgba(0, 0, 0, 0.25);
    padding: 0.85rem;
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    font-size: 0.85rem;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.light-mode .math-render-area {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.math-block {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: var(--border-radius-md);
    overflow-x: auto;
    margin: 1rem 0;
    text-align: center;
}

.light-mode .math-block {
    background: #f1f5f9;
}

/* Theory & Education Section (Under dashboard) */
.theory-section {
    padding: 4rem 2rem;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-color);
}

.light-mode .theory-section {
    background: rgba(255, 255, 255, 0.5);
}

.theory-header {
    max-width: 1200px;
    margin: 0 auto 2.5rem;
}

.theory-header h2 {
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-primary);
}

.grid-2col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.theory-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.2rem;
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    box-shadow: var(--box-shadow);
}

.theory-card h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.theory-card ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.theory-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.25rem;
}

.theory-card li::before {
    content: "•";
    color: var(--color-primary);
    font-weight: bold;
    display: inline-block;
    width: 1rem;
    margin-left: -1.25rem;
    position: absolute;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.light-mode .btn-secondary {
    background: #e2e8f0;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.light-mode .btn-secondary:hover {
    background: #cbd5e1;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
}

/* Footer styling */
.app-footer {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* Responsive collapse rules */
@media (max-width: 1200px) {
    .app-workspace {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }
    .panel-controls, .panel-viewport, .panel-results {
        width: 100% !important;
        height: auto;
        max-height: none;
        flex-shrink: 1;
    }
    .panel-viewport {
        height: 550px;
    }
    .resizer-v {
        display: none; /* Hide drag resizer on tablet/mobile where layout is stacked */
    }
}

@media (max-width: 850px) {
    .panel-viewport {
        height: 450px;
    }
    .grid-2col {
        grid-template-columns: 1fr;
    }
    .app-header {
        padding: 0 1rem;
    }
}

/* Coordinate Sliders Styling */
.coordinate-slider-group {
    border-top: 1px dashed var(--border-color);
    padding-top: 0.8rem;
    margin-top: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.coord-group-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.2rem;
}

.sub-row {
    gap: 0.2rem !important;
}

.sub-row label {
    display: flex;
    justify-content: space-between;
    width: 100%;
    font-size: 0.76rem;
    color: var(--text-secondary);
}

.sub-row .value-display {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-primary);
    font-weight: 600;
}

/* Custom Tooltip Styling */
.custom-tooltip {
    position: absolute;
    background: rgba(15, 23, 42, 0.95);
    color: #f3f4f6;
    padding: 0.6rem 0.9rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: normal;
    max-width: 240px;
    width: max-content;
    text-align: center;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.08);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast) ease, transform var(--transition-fast) ease;
    transform: translateY(5px);
    z-index: 9999;
    backdrop-filter: blur(8px);
    line-height: 1.4;
}

.light-mode .custom-tooltip {
    background: rgba(255, 255, 255, 0.95);
    color: #1e293b;
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

.custom-tooltip::after {
    content: '';
    position: absolute;
    border-width: 6px;
    border-style: solid;
}

.custom-tooltip.tooltip-top::after {
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    border-color: rgba(15, 23, 42, 0.95) transparent transparent transparent;
}

.light-mode .custom-tooltip.tooltip-top::after {
    border-color: rgba(255, 255, 255, 0.95) transparent transparent transparent;
}

.custom-tooltip.tooltip-bottom::after {
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    border-color: transparent transparent rgba(15, 23, 42, 0.95) transparent;
}

.light-mode .custom-tooltip.tooltip-bottom::after {
    border-color: transparent transparent rgba(255, 255, 255, 0.95) transparent;
}

/* 3D Viewport Tooltips adjustments */
.tooltip-3d {
    pointer-events: none;
    transform: none;
    transition: opacity var(--transition-fast) ease;
    padding: 0.8rem 1rem !important;
}

.tooltip-3d::after {
    display: none !important;
}

.tooltip-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: #60a5fa; /* Light blue accent for titles */
    margin-bottom: 0.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.25rem;
}

.light-mode .tooltip-title {
    color: var(--color-primary);
    border-bottom-color: rgba(0, 0, 0, 0.1);
}

.tooltip-row {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    font-size: 0.72rem;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.tooltip-row span {
    color: var(--text-secondary);
}

.tooltip-row strong {
    color: var(--text-primary);
}

.tooltip-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    margin: 0.4rem 0;
}

.light-mode .tooltip-divider {
    background: rgba(0, 0, 0, 0.08);
}

.tooltip-notes {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-align: left;
    line-height: 1.35;
}

/* Theory Modal Overlay */
.theory-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 15, 25, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    box-sizing: border-box;
    opacity: 1;
    pointer-events: all;
    transition: opacity 0.25s ease;
}

.theory-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.theory-modal-card {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    width: 100%;
    max-width: 860px;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

.theory-close-btn {
    position: absolute;
    top: 1rem;
    right: 1.2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    font-size: 1.5rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast) ease;
    z-index: 110;
}

.theory-close-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
}

.theory-modal-header {
    padding: 1.5rem 2rem 1rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.theory-modal-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.theory-modal-body {
    padding: 1.5rem 2rem 2rem 2rem;
    overflow-y: auto;
    max-height: 100%;
}

.theory-card h3 {
    font-size: 0.95rem;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.theory-card p {
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

/* Light mode overrides */
.light-mode .theory-overlay {
    background: rgba(240, 244, 249, 0.85);
}

.light-mode .theory-modal-card {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.light-mode .theory-modal-header {
    border-bottom-color: rgba(0, 0, 0, 0.05);
}

.light-mode .theory-close-btn {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
    color: #64748b;
}

.light-mode .theory-close-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

/* Draggable resizer styling */
.resizer-v {
    width: 6px;
    background: rgba(255, 255, 255, 0.05);
    cursor: col-resize;
    position: relative;
    transition: background 0.15s ease;
    flex-shrink: 0;
    z-index: 10;
    border-left: 1px solid rgba(255, 255, 255, 0.04);
    border-right: 1px solid rgba(0, 0, 0, 0.2);
}

.resizer-v:hover, .resizer-v.dragging {
    background: var(--color-primary); /* Blue highlight when dragging/hovering */
    border-left-color: transparent;
    border-right-color: transparent;
}

.light-mode .resizer-v {
    background: rgba(0, 0, 0, 0.05);
    border-left-color: rgba(0, 0, 0, 0.04);
    border-right-color: rgba(255, 255, 255, 0.2);
}

.light-mode .resizer-v:hover, .light-mode .resizer-v.dragging {
    background: var(--color-primary);
}

/* Glossary Term styling */
.glossary-term-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.2rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.glossary-term-card h4 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
}

.glossary-term-card p {
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
}

.glossary-term-card p:last-child {
    margin-bottom: 0;
}

.glossary-link {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s ease;
}

.glossary-link:hover {
    color: var(--color-primary-hover);
    text-decoration-thickness: 2px;
}

/* Glow highlight keyframe animation */
@keyframes glow {
    0% {
        box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.4);
        border-color: #3b82f6;
        background: rgba(59, 130, 246, 0.05);
    }
    100% {
        box-shadow: 0 0 0 0px rgba(59, 130, 246, 0);
        border-color: var(--border-color);
        background: var(--bg-card);
    }
}

.glow-highlight {
    animation: glow 2s ease-out;
}