/* ==========================================================================
   Virtual Instrumentation Labs - 6-Axis Industrial Robot Simulator
   Hyper-Realistic Laboratory CSS & Interface Stylesheet
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
    --bg-main: #f8fafc;
    --card-bg: #ffffff;
    --card-header-bg: #f1f5f9;
    --border-color: #cbd5e1;
    --border-light: #e2e8f0;
    
    /* Industrial Blue & Orange Accent Colors */
    --primary-blue: #1e3a8a;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --accent-orange: #ea580c;
    --accent-orange-hover: #c2410c;
    --accent-dark: #0f172a;
    
    /* Feedback Colors */
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-danger-bg: #fee2e2;
    --color-warning: #f59e0b;
    
    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 16px;
    gap: 16px;
    max-width: 1720px;
    margin: 0 auto;
}

/* ==========================================================================
   HEADER BAR
   ========================================================================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

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

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary-blue);
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.experiment-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    padding: 4px 12px;
    border-radius: 6px;
}

.exp-code {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent-blue);
    background: #dbeafe;
    padding: 2px 6px;
    border-radius: 4px;
}

.exp-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-indicator-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-header-bg);
    border: 1px solid var(--border-light);
    padding: 6px 14px;
    border-radius: 6px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-muted);
}

.status-dot.ready {
    background-color: var(--color-success);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
}

.status-dot.moving {
    background-color: var(--accent-blue);
    animation: pulse 1s infinite alternate;
}

.status-dot.estop {
    background-color: var(--color-danger);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.9);
    animation: blink 0.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    100% { transform: scale(1.25); opacity: 1; }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

.status-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

/* Emergency Stop Button */
.estop-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--color-danger);
    color: #ffffff;
    border: 2px solid #b91c1c;
    border-radius: 6px;
    padding: 8px 16px;
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
}

.estop-btn:hover {
    background-color: var(--color-danger-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(239, 68, 68, 0.4);
}

.estop-btn.active-alarm {
    background-color: #991b1b;
    border-color: #7f1d1d;
    animation: estop-pulse 0.6s infinite alternate;
}

@keyframes estop-pulse {
    0% { background-color: #dc2626; }
    100% { background-color: #7f1d1d; }
}

.estop-icon {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   WORKSPACE GRID (TWO COLUMN)
   ========================================================================== */
.workspace-grid {
    display: grid;
    grid-template-columns: 1fr 450px;
    gap: 16px;
}

@media (max-width: 1200px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.panel-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-icon {
    width: 18px;
    height: 18px;
    color: var(--primary-blue);
}

.panel-header h2 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.mode-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    background: #dbeafe;
    color: var(--primary-blue);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid #bfdbfe;
}

/* ==========================================================================
   LEFT PANEL: SVG WORKSPACE
   ========================================================================== */
.left-panel {
    min-height: 600px;
}

.view-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ctrl-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

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

.view-btn.active {
    background: var(--primary-blue);
    color: #ffffff;
    border-color: var(--primary-blue);
    box-shadow: 0 1px 3px rgba(30, 58, 138, 0.3);
}

.icon-toggle-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
}

.icon-toggle-btn.active {
    background: #e0f2fe;
    border-color: #0284c7;
    color: #0369a1;
}

.icon-toggle-btn svg {
    width: 14px;
    height: 14px;
}

.svg-container {
    position: relative;
    width: 100%;
    height: 530px;
    background: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border-light);
}

#robot-svg {
    width: 100%;
    height: 100%;
    user-select: none;
}

.workspace-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-header-bg);
    padding: 8px 16px;
}

.legend-items {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.color-box {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.color-box.yellow { background: #ea580c; }
.color-box.blue { background: #2563eb; }
.color-box.green { background: #10b981; }
.color-box.red { background: #ef4444; }

.speed-control-box {
    display: flex;
    align-items: center;
    gap: 8px;
}

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

#speed-slider {
    width: 90px;
    cursor: pointer;
}

/* ==========================================================================
   RIGHT PANEL: CONTROLS & TELEMETRY
   ========================================================================== */
.right-panel {
    padding: 0;
}

.telemetry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px 16px;
    background: #f8fafc;
    border-bottom: 1px solid var(--border-light);
}

.telemetry-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
}

.tele-title {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.tele-values {
    display: flex;
    justify-content: space-between;
}

.tele-col {
    font-size: 0.78rem;
    font-weight: 600;
}

.lbl-x, .lbl-roll { color: #ef4444; }
.lbl-y, .lbl-pitch { color: #10b981; }
.lbl-z, .lbl-yaw { color: #2563eb; }

.mono-val {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-primary);
}

.mono-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-blue);
    background: var(--bg-hover, #dbeafe);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Joint Slider Controls */
.joint-controls-container {
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 330px;
    overflow-y: auto;
}

.section-subtitle {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.joint-row {
    display: flex;
    flex-direction: column;
    background: var(--card-header-bg);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 6px 10px;
    gap: 4px;
    transition: border-color 0.15s ease;
}

.joint-row:hover {
    border-color: var(--border-color);
}

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

.joint-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
}

.joint-val {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-orange);
    background: var(--bg-input, #ffffff);
    border: 1px solid var(--border-color, var(--border-light));
    padding: 1px 6px;
    border-radius: 4px;
}

.joint-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.jog-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    width: 32px;
    height: 24px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.1s ease;
}

.jog-btn:hover {
    background: var(--primary-blue);
    color: #ffffff;
    border-color: var(--primary-blue);
}

.joint-slider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    cursor: pointer;
}

.joint-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--accent-orange);
    border: 2px solid #ffffff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
    cursor: pointer;
    transition: transform 0.1s ease;
}

.joint-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    background: var(--accent-orange-hover);
}

.joint-limits {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* End Effector & Actions */
.actions-container {
    padding: 12px 16px;
    background: var(--card-bg, #f8fafc);
    border-top: 1px solid var(--border-color, var(--border-light));
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.gripper-control-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 12px;
}

.gripper-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.grp-lbl {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.grp-badge {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
}

.grp-badge.open {
    background: #e0f2fe;
    color: #0284c7;
}

.grp-badge.closed {
    background: var(--color-success-bg);
    color: #047857;
}

.grp-badge.attached {
    background: #fef3c7;
    color: #b45309;
}

.gripper-btn-group {
    display: flex;
    gap: 6px;
}

/* Generic Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 7px 12px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.btn-icon {
    width: 14px;
    height: 14px;
}

.btn-secondary {
    background: var(--card-header-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #e2e8f0;
}

.btn-action {
    background: var(--surface, #ffffff);
    border-color: var(--border-color);
    color: var(--primary-blue);
    font-weight: 600;
}

.btn-action:hover {
    background: var(--bg-hover, #eff6ff);
    border-color: var(--border-color);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

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

.action-buttons-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.teach-buttons-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 8px;
    margin-top: 4px;
}

.btn-primary {
    background: var(--primary-blue);
    color: #ffffff;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-success {
    background: var(--color-success);
    color: #ffffff;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: #f87171;
    color: #ffffff;
}

.btn-danger:hover {
    background: var(--color-danger);
}

/* ==========================================================================
   BOTTOM PANEL: TEACH TABLE & EVENT CONSOLE
   ========================================================================== */
.bottom-panel {
    padding: 14px 16px;
}

.bottom-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 16px;
}

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

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

.section-title-box {
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title-box h3 {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.teach-counter {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.teach-counter strong {
    font-family: var(--font-mono);
    color: var(--accent-blue);
    background: var(--bg-hover, #dbeafe);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Teach Table */
.table-scroll-wrapper {
    max-height: 180px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--card-bg, #ffffff);
}

.teach-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.76rem;
    text-align: left;
}

.teach-table th {
    background: var(--card-header-bg);
    color: var(--text-secondary);
    font-weight: 700;
    padding: 6px 10px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
}

.teach-table td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--border-light);
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.teach-table tbody tr:hover {
    background-color: #f8fafc;
}

.teach-table tbody tr.active-step {
    background-color: #e0f2fe;
    font-weight: 700;
}

.empty-row td {
    text-align: center;
    font-family: var(--font-main);
    color: var(--text-muted);
    padding: 20px;
}

.table-btn {
    background: var(--card-header-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-size: 0.68rem;
    padding: 2px 6px;
    cursor: pointer;
    margin-right: 2px;
}

.table-btn:hover {
    background: var(--primary-blue);
    color: #ffffff;
}

.table-btn.delete-btn:hover {
    background: var(--color-danger);
    color: #ffffff;
}

/* Event Console */
.event-console-container {
    display: flex;
    flex-direction: column;
}

.btn-text-only {
    background: none;
    border: none;
    font-size: 0.72rem;
    color: var(--accent-blue);
    font-weight: 600;
    cursor: pointer;
}

.btn-text-only:hover {
    text-decoration: underline;
}

.console-box {
    background: #0f172a;
    color: #cbd5e1;
    border-radius: 6px;
    padding: 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    height: 180px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    border: 1px solid #1e293b;
}

.log-entry {
    display: flex;
    gap: 8px;
    line-height: 1.4;
}

.log-time {
    color: #64748b;
    flex-shrink: 0;
}

.log-entry.info .log-msg { color: #93c5fd; }
.log-entry.success .log-msg { color: #6ee7b7; }
.log-entry.warn .log-msg { color: #fde047; }
.log-entry.error .log-msg { color: #fca5a5; }

/* Disabled states */
button:disabled, input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

/* Mobile Portrait */
@media screen and (max-width: 767px) and (orientation: portrait) {
    .workspace-grid {
        display: flex;
        flex-direction: column;
        padding: 8px;
        gap: 10px;
    }
    .viewport-card {
        order: 1;
    }
    .controls-card {
        order: 2;
    }
    .bottom-section-grid {
        display: flex;
        flex-direction: column;
        order: 3;
    }
    .canvas-container svg, .canvas-container canvas {
        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;
    }
    .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) {
    .workspace-grid {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        padding: 8px;
        gap: 10px;
    }
    .bottom-section-grid {
        grid-template-columns: 1fr 1fr;
    }
}