/* ==========================================================================
   Virtual Instrumentation Labs - 3-Axis Cartesian Robot Simulator
   Industrial CAD Laboratory Design System & Stylesheet
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-main: #f8fafc;
    --panel-bg: #ffffff;
    --panel-border: #e2e8f0;
    --panel-header-bg: #f1f5f9;
    
    --primary-blue: #2563eb;
    --primary-blue-hover: #1d4ed8;
    --dark-navy: #0f172a;
    --header-navy: #1e3a8a;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-x: #ef4444;
    --accent-y: #22c55e;
    --accent-z: #3b82f6;
    --accent-orange: #ea580c;
    
    --state-success: #16a34a;
    --state-warning: #eab308;
    --state-danger: #dc2626;
    
    /* Shadows & Radii */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* ==========================================================================
   Header Styling
   ========================================================================== */
.app-header {
    background-color: var(--header-navy);
    color: #ffffff;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    background-color: #3b82f6;
    color: #ffffff;
    padding: 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-container h1 {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.sub-heading {
    font-size: 0.75rem;
    color: #93c5fd;
    font-weight: 500;
}

.experiment-title-badge {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 4px 12px;
    gap: 10px;
}

.badge-tag {
    background-color: #38bdf8;
    color: #0f172a;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
}

.badge-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #cbd5e1;
    background: rgba(15, 23, 42, 0.6);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid #334155;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #94a3b8;
}

.status-indicator.active {
    background-color: #22c55e;
    box-shadow: 0 0 8px #22c55e;
}

.status-indicator.estop {
    background-color: #ef4444;
    box-shadow: 0 0 8px #ef4444;
}

/* ==========================================================================
   Main Simulator Layout Grid
   ========================================================================== */
.simulator-layout {
    display: grid;
    grid-template-columns: 1fr 430px;
    gap: 16px;
    padding: 16px;
    flex: 1;
}

@media (max-width: 1100px) {
    .simulator-layout {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   LEFT PANEL: Robot Workspace Visualizer & Camera Controls
   ========================================================================== */
.workspace-panel {
    background-color: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    background-color: var(--panel-header-bg);
    border-bottom: 1px solid var(--panel-border);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.panel-title {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--dark-navy);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Camera Controls */
.camera-mode-group {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: #ffffff;
    border: 1px solid #cbd5e1;
    padding: 3px 6px;
    border-radius: var(--radius-sm);
}

.cam-label {
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-muted);
    margin-right: 2px;
}

.cam-btn {
    background: transparent;
    border: none;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.cam-btn:hover {
    background-color: #f1f5f9;
    color: var(--dark-navy);
}

.cam-btn.active {
    background-color: #0f172a;
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

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

.view-btn {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    color: var(--text-secondary);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.view-btn:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

.view-btn.active {
    background: #2563eb;
    color: #ffffff;
    border-color: #2563eb;
}

/* SVG Container & 3D Camera Scene Transition */
.svg-container {
    flex: 1;
    min-height: 480px;
    background-color: #f8fafc;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.svg-container svg {
    width: 100%;
    height: 100%;
    max-height: 620px;
}

/* Smooth Camera Perspective Morphing */
#sceneViewGroup {
    transform-origin: 475px 340px;
    transition: transform 0.75s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Orthographic Top-Down View Transform */
.view-top #sceneViewGroup {
    transform: rotateX(56deg) rotateZ(-33deg) scale(1.35) translate(30px, 45px);
}

.workspace-footer-bar {
    background-color: #0f172a;
    color: #ffffff;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    border-top: 1px solid #334155;
    flex-wrap: wrap;
    gap: 10px;
}

.telemetry-pill {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.pill-label {
    font-size: 0.65rem;
    font-weight: 700;
    color: #94a3b8;
    letter-spacing: 0.05em;
}

.pill-val {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: #38bdf8;
}

/* ==========================================================================
   RIGHT PANEL: Controls & Sliders
   ========================================================================== */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.control-card {
    background-color: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 14px;
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--dark-navy);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 6px;
}

/* Buttons System */
.btn {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.15s ease;
    user-select: none;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: #2563eb;
    color: #ffffff;
}
.btn-primary:hover:not(:disabled) {
    background-color: #1d4ed8;
}

.btn-success {
    background-color: #16a34a;
    color: #ffffff;
}
.btn-success:hover:not(:disabled) {
    background-color: #15803d;
}

.btn-secondary {
    background-color: #64748b;
    color: #ffffff;
}
.btn-secondary:hover:not(:disabled) {
    background-color: #475569;
}

.btn-danger {
    background-color: #dc2626;
    color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
}

.btn-outline {
    background-color: transparent;
    border-color: #cbd5e1;
    color: var(--text-primary);
}
.btn-outline:hover:not(:disabled) {
    background-color: #f1f5f9;
}

.btn-action {
    background-color: #0f172a;
    color: #ffffff;
}
.btn-action:hover:not(:disabled) {
    background-color: #1e293b;
}

.btn-action-active {
    background-color: #0284c7;
    color: #ffffff;
}
.btn-action-active:hover:not(:disabled) {
    background-color: #0369a1;
}

.system-btn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* Digital Readout (DRO) */
.dro-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background-color: #0f172a;
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
}

.dro-axis {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px dashed #334155;
    padding-bottom: 4px;
}

.dro-axis:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.dro-label {
    font-size: 0.75rem;
    font-weight: 700;
}

.dro-x .dro-label { color: #fca5a5; }
.dro-y .dro-label { color: #86efac; }
.dro-z .dro-label { color: #93c5fd; }

.dro-value-box {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.dro-val {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.dro-x .dro-val { color: #ef4444; }
.dro-y .dro-val { color: #22c55e; }
.dro-z .dro-val { color: #3b82f6; }

.dro-unit {
    font-size: 0.75rem;
    color: #94a3b8;
    font-family: var(--font-mono);
}

.status-badge-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.status-box {
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 8px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.box-title {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
}

.box-status {
    font-size: 0.8rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    margin-top: 2px;
}

.status-ready { background-color: #dcfce7; color: #15803d; }
.status-busy { background-color: #fef9c3; color: #a16207; }
.status-off { background-color: #f1f5f9; color: #64748b; }
.status-estop { background-color: #fee2e2; color: #b91c1c; }

/* Position Sliders System */
.slider-control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 12px;
    border-radius: var(--radius-sm);
}

.slider-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.slider-name {
    font-size: 0.75rem;
    font-weight: 800;
}

.slider-x-row .slider-name { color: #dc2626; }
.slider-y-row .slider-name { color: #16a34a; }
.slider-z-row .slider-name { color: #2563eb; }

.slider-val-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    background-color: #0f172a;
    color: #38bdf8;
    padding: 1px 8px;
    border-radius: 4px;
}

.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #cbd5e1;
    outline: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.range-x::-webkit-slider-thumb { background: #ef4444; }
.range-y::-webkit-slider-thumb { background: #22c55e; }
.range-z::-webkit-slider-thumb { background: #3b82f6; }

/* Jogging Controls */
.jog-speed-selector {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}

.jog-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.step-btn {
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.step-btn.active {
    background: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
}

.jog-controls-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.jog-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
}

.group-name {
    font-size: 0.75rem;
    font-weight: 800;
    width: 60px;
}

.jog-x-group .group-name { color: #dc2626; }
.jog-y-group .group-name { color: #16a34a; }
.jog-z-group .group-name { color: #2563eb; }

.btn-pair {
    display: flex;
    gap: 6px;
    flex: 1;
    justify-content: flex-end;
}

.jog-btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid #cbd5e1;
    background-color: #ffffff;
    cursor: pointer;
    transition: all 0.1s ease;
    user-select: none;
}

.jog-btn:hover {
    background-color: #f1f5f9;
    border-color: #94a3b8;
}

.jog-btn:active {
    background-color: #cbd5e1;
    transform: scale(0.97);
}

.jog-x-group .jog-btn { border-left: 3px solid #ef4444; }
.jog-y-group .jog-btn { border-left: 3px solid #22c55e; }
.jog-z-group .jog-btn { border-left: 3px solid #3b82f6; }

.actuator-grid, .macro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 8px;
}

/* ==========================================================================
   BOTTOM PANEL: Guided Exercise & Log
   ========================================================================== */
.bottom-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 0 16px 16px 16px;
}

@media (max-width: 900px) {
    .bottom-panel {
        grid-template-columns: 1fr;
    }
}

.exercise-card, .log-card {
    background-color: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    padding: 14px;
    box-shadow: var(--shadow-sm);
}

.panel-sub-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 8px;
    margin-bottom: 10px;
}

.sub-title {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--dark-navy);
    letter-spacing: 0.05em;
}

.exercise-badge {
    background-color: #fef9c3;
    color: #854d0e;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 12px;
}

.exercise-badge.completed {
    background-color: #dcfce7;
    color: #15803d;
}

.exercise-instruction p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.exercise-instruction code {
    background-color: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    color: var(--dark-navy);
}

.task-steps-progress {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.step-item {
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-sm);
    padding: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.6;
    transition: all 0.2s ease;
}

.step-item.active {
    opacity: 1;
    border-color: #3b82f6;
    background-color: #eff6ff;
}

.step-item.done {
    opacity: 1;
    border-color: #22c55e;
    background-color: #f0fdf4;
}

.step-num {
    background-color: #cbd5e1;
    color: #0f172a;
    font-size: 0.7rem;
    font-weight: 800;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-item.active .step-num {
    background-color: #3b82f6;
    color: #ffffff;
}

.step-item.done .step-num {
    background-color: #22c55e;
    color: #ffffff;
}

.step-text {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

/* Log Terminal */
.log-clear-btn {
    background: none;
    border: none;
    font-size: 0.7rem;
    color: var(--text-muted);
    cursor: pointer;
    font-weight: 600;
}

.log-clear-btn:hover {
    color: var(--text-primary);
}

.log-terminal {
    background-color: #0f172a;
    border-radius: var(--radius-sm);
    padding: 10px;
    height: 90px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.log-entry {
    line-height: 1.3;
}

.log-sys { color: #94a3b8; }
.log-info { color: #38bdf8; }
.log-success { color: #4ade80; }
.log-warn { color: #facc15; }
.log-error { color: #f87171; }

/* Settings Modal */
.settings-modal {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 90;
}

.settings-modal.hidden {
    display: none;
}

.settings-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    width: 380px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--panel-border);
}

.settings-hdr {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 10px;
    margin-bottom: 14px;
}

.settings-hdr h3 {
    font-size: 1rem;
    font-weight: 800;
    color: var(--dark-navy);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    color: var(--text-muted);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.setting-item label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.speed-btn-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.spd-btn {
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    padding: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.spd-btn.active {
    background: #2563eb;
    color: #ffffff;
    border-color: #2563eb;
}

.setting-select {
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid #cbd5e1;
    font-size: 0.8rem;
    font-weight: 600;
    background: #ffffff;
}

/* Completion Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background-color: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: opacity 0.25s ease;
}

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

.modal-card {
    background-color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 30px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--panel-border);
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.modal-card h2 {
    font-size: 1.4rem;
    color: var(--dark-navy);
    font-weight: 800;
    margin-bottom: 8px;
}

.modal-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal-stats {
    display: flex;
    justify-content: space-around;
    background-color: #f8fafc;
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    border: 1px solid #e2e8f0;
}

.m-stat {
    display: flex;
    flex-direction: column;
}

.m-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
}

.m-val {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: #16a34a;
}

/* ================= RESPONSIVE MEDIA QUERIES ================= */

/* Tablet */
@media screen and (max-width: 1024px) {
    .simulator-layout {
        grid-template-columns: 1fr;
        padding: 12px;
        gap: 12px;
    }
    .bottom-panel-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile Portrait */
@media screen and (max-width: 767px) and (orientation: portrait) {
    .simulator-layout {
        display: flex;
        flex-direction: column;
        padding: 8px;
        gap: 10px;
    }
    .workspace-panel {
        order: 1;
    }
    .controls-panel {
        order: 2;
    }
    .bottom-panel-grid {
        display: flex;
        flex-direction: column;
        order: 3;
    }
    .workspace-viewport svg {
        width: 100%;
        height: auto;
        max-height: 50vh;
    }
    /* Touch-friendly targets */
    .btn, button, select, input[type="range"], .tab-btn {
        min-height: 44px;
        font-size: 16px !important;
    }
    .jog-grid, .axis-controls {
        grid-template-columns: 1fr;
    }
    .app-header {
        padding: 8px 12px;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}

/* Mobile Landscape */
@media screen and (max-width: 950px) and (orientation: landscape) {
    .simulator-layout {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        padding: 8px;
        gap: 10px;
    }
    .bottom-panel-grid {
        grid-template-columns: 1fr 1fr;
    }
}



/* ==========================================================================
   DARK / BLACK THEME (PrayogSetu Global Theme System)
   ========================================================================== */
html[data-theme="dark"],
:root[data-theme="dark"] {
    --bg-main: #080d18;
    --panel-bg: #0f172a;
    --panel-border: #1e293b;
    --panel-header-bg: #131d31;

    --dark-navy: #f8fafc;
    --header-navy: #0b1120;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
}

html[data-theme="dark"] body {
    background-color: #080d18 !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .app-header {
    background-color: #0b1120 !important;
    border-bottom: 1px solid #1e293b !important;
}

html[data-theme="dark"] .workspace-panel {
    background-color: #0f172a !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .panel-header {
    background-color: #131d31 !important;
    border-bottom-color: #1e293b !important;
}

html[data-theme="dark"] .panel-title {
    color: #f8fafc !important;
}

html[data-theme="dark"] .camera-mode-group {
    background-color: #0a0f1d !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .cam-btn {
    color: #94a3b8 !important;
}

html[data-theme="dark"] .cam-btn:hover {
    background-color: #1e293b !important;
    color: #ffffff !important;
}

html[data-theme="dark"] .cam-btn.active {
    background-color: #2563eb !important;
    color: #ffffff !important;
}

html[data-theme="dark"] .view-btn {
    background: #0a0f1d !important;
    border-color: #1e293b !important;
    color: #94a3b8 !important;
}

html[data-theme="dark"] .view-btn:hover {
    background: #1e293b !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .view-btn.active {
    background: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
}

/* SVG Robot Visualizer Canvas */
html[data-theme="dark"] .svg-container {
    background-color: #080d18 !important;
}

html[data-theme="dark"] .svg-container svg > rect:first-of-type,
html[data-theme="dark"] #robotSvg > rect:first-of-type,
html[data-theme="dark"] #robot-svg > #environment-layer > rect:first-of-type {
    fill: #080d18 !important;
}

html[data-theme="dark"] #worktableGroup polygon[fill="url(#worktableSurface)"] {
    fill: #1a2333 !important;
    stroke: #263550 !important;
}

html[data-theme="dark"] #worktableGroup polygon[points="140,480 410,615 410,632 140,497"] {
    fill: #0f172a !important;
    stroke: #1e293b !important;
}

html[data-theme="dark"] #worktableGroup polygon[points="410,615 810,415 810,432 410,632"] {
    fill: #131d31 !important;
    stroke: #1e293b !important;
}

html[data-theme="dark"] #gridGroup line {
    stroke: #334155 !important;
}

html[data-theme="dark"] .workspace-footer-bar {
    background-color: #0a0f1d !important;
    border-top-color: #1e293b !important;
}

/* Control Panels & Cards */
html[data-theme="dark"] .control-card {
    background-color: #0f172a !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .card-title {
    color: #f8fafc !important;
    border-bottom-color: #1e293b !important;
}

html[data-theme="dark"] .btn-outline {
    border-color: #334155 !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .btn-outline:hover:not(:disabled) {
    background-color: #1e293b !important;
}

html[data-theme="dark"] .btn-action {
    background-color: #1e293b !important;
    color: #f8fafc !important;
    border: 1px solid #334155 !important;
}

html[data-theme="dark"] .btn-action:hover:not(:disabled) {
    background-color: #334155 !important;
}

/* DRO Display */
html[data-theme="dark"] .dro-container {
    background-color: #080d18 !important;
    border: 1px solid #1e293b !important;
}

html[data-theme="dark"] .status-box {
    background-color: #131d31 !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .status-ready { background-color: rgba(22, 163, 74, 0.2) !important; color: #4ade80 !important; }
html[data-theme="dark"] .status-busy { background-color: rgba(234, 179, 8, 0.2) !important; color: #fde047 !important; }
html[data-theme="dark"] .status-off { background-color: rgba(100, 116, 139, 0.2) !important; color: #94a3b8 !important; }
html[data-theme="dark"] .status-estop { background-color: rgba(220, 38, 38, 0.2) !important; color: #f87171 !important; }

/* Sliders */
html[data-theme="dark"] .slider-control-group {
    background-color: #131d31 !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .slider-val-badge {
    background-color: #080d18 !important;
    color: #38bdf8 !important;
}

html[data-theme="dark"] .range-slider {
    background: #263550 !important;
}

/* Jogging Controls */
html[data-theme="dark"] .step-btn {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #94a3b8 !important;
}

html[data-theme="dark"] .step-btn.active {
    background: #3b82f6 !important;
    color: #ffffff !important;
    border-color: #3b82f6 !important;
}

html[data-theme="dark"] .jog-group {
    background-color: #131d31 !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .jog-btn {
    background-color: #0f172a !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .jog-btn:hover {
    background-color: #1e293b !important;
    border-color: #475569 !important;
}

html[data-theme="dark"] .jog-btn:active {
    background-color: #2563eb !important;
}

/* Bottom Panel: Exercise & Log */
html[data-theme="dark"] .exercise-card,
html[data-theme="dark"] .log-card {
    background-color: #0f172a !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .panel-sub-header {
    border-bottom-color: #1e293b !important;
}

html[data-theme="dark"] .sub-title {
    color: #f8fafc !important;
}

html[data-theme="dark"] .exercise-badge {
    background-color: rgba(234, 179, 8, 0.2) !important;
    color: #fde047 !important;
}

html[data-theme="dark"] .exercise-badge.completed {
    background-color: rgba(22, 163, 74, 0.2) !important;
    color: #4ade80 !important;
}

html[data-theme="dark"] .exercise-instruction code {
    background-color: #1e293b !important;
    color: #38bdf8 !important;
}

html[data-theme="dark"] .step-item {
    background-color: #131d31 !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .step-item.active {
    background-color: rgba(59, 130, 246, 0.15) !important;
    border-color: #3b82f6 !important;
}

html[data-theme="dark"] .step-item.done {
    background-color: rgba(34, 197, 94, 0.15) !important;
    border-color: #22c55e !important;
}

html[data-theme="dark"] .step-num {
    background-color: #334155 !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .step-text {
    color: #cbd5e1 !important;
}

html[data-theme="dark"] .log-terminal {
    background-color: #080d18 !important;
    border: 1px solid #1e293b !important;
}

/* Modals */
html[data-theme="dark"] .settings-card,
html[data-theme="dark"] .modal-card {
    background: #0f172a !important;
    border-color: #1e293b !important;
}

html[data-theme="dark"] .settings-hdr {
    border-bottom-color: #1e293b !important;
}

html[data-theme="dark"] .settings-hdr h3,
html[data-theme="dark"] .modal-card h2 {
    color: #f8fafc !important;
}

html[data-theme="dark"] .spd-btn {
    background: #131d31 !important;
    border-color: #334155 !important;
    color: #94a3b8 !important;
}

html[data-theme="dark"] .spd-btn.active {
    background: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
}

html[data-theme="dark"] .setting-select {
    background: #131d31 !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

html[data-theme="dark"] .modal-stats {
    background-color: #131d31 !important;
    border-color: #1e293b !important;
}