/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-main: #0b0f19;
    --bg-card: rgba(18, 26, 43, 0.6);
    --bg-sidebar: #0f1524;
    --bg-input: #172033;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(255, 255, 255, 0.2);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Diagnostics Glow Colors */
    --cyan: #00f2fe;
    --cyan-glow: rgba(0, 242, 254, 0.15);
    
    --emerald: #10b981;
    --emerald-glow: rgba(16, 185, 129, 0.15);
    
    --purple: #8b5cf6;
    --purple-glow: rgba(139, 92, 246, 0.15);
    
    --red: #ef4444;
    --red-glow: rgba(239, 68, 68, 0.15);
    
    --orange: #f97316;
    --orange-glow: rgba(249, 115, 22, 0.15);
    
    --yellow: #f59e0b;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow-x: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Ambient glow background decorations */
.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    z-index: -1;
    opacity: 0.3;
    pointer-events: none;
    transition: all 1s ease-in-out;
}
.glow-orb-1 {
    width: 500px;
    height: 500px;
    background: var(--purple);
    top: -10%;
    left: -10%;
}
.glow-orb-2 {
    width: 600px;
    height: 600px;
    background: var(--cyan);
    bottom: -15%;
    right: -10%;
}
.glow-orb-3 {
    width: 300px;
    height: 300px;
    background: var(--orange);
    top: 40%;
    left: 60%;
}

/* ==========================================================================
   ROOT APP LAYOUT
   ========================================================================== */
#app-root {
    display: flex;
    width: 96vw;
    height: 94vh;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   SIDEBAR NAVIGATION
   ========================================================================== */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 40px;
    cursor: pointer;
    transition: transform var(--transition-fast);
}
.sidebar-brand:hover {
    transform: translateY(-1px);
}
.brand-icon {
    width: 36px;
    height: 36px;
    color: var(--cyan);
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.4));
}
.brand-text h1 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}
.brand-text span {
    font-size: 11px;
    color: var(--cyan);
    font-weight: 600;
    letter-spacing: 1px;
}

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

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin: 20px 0 8px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: 12px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.nav-item svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform var(--transition-fast);
}
.nav-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}
.nav-item:hover svg {
    transform: scale(1.1);
}
.nav-item.active {
    color: var(--cyan);
    background: rgba(0, 242, 254, 0.08);
    font-weight: 600;
}
.nav-item.active svg {
    filter: drop-shadow(0 0 4px var(--cyan));
}

.sidebar-footer {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 600;
    align-self: flex-start;
}

/* ==========================================================================
   CONTENT LAYOUT & VIEWS
   ========================================================================== */
.content-area {
    flex-grow: 1;
    overflow-y: auto;
    position: relative;
    padding: 40px;
    display: flex;
    flex-direction: column;
}

.view {
    display: none;
    flex-direction: column;
    height: 100%;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}
.view.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.content-header {
    margin-bottom: 36px;
}
.content-header h2 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}
.content-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ==========================================================================
   BUTTONS & FORMS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-main);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -8px rgba(255, 255, 255, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.btn-outline:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--border-focus);
}

.btn-cyan {
    background: rgba(0, 242, 254, 0.1);
    color: var(--cyan);
    border-color: rgba(0, 242, 254, 0.2);
}
.btn-cyan:hover {
    background: var(--cyan);
    color: var(--bg-main);
    box-shadow: 0 10px 20px -8px rgba(0, 242, 254, 0.4);
}

.btn-emerald {
    background: rgba(16, 185, 129, 0.1);
    color: var(--emerald);
    border-color: rgba(16, 185, 129, 0.2);
}
.btn-emerald:hover {
    background: var(--emerald);
    color: var(--bg-main);
    box-shadow: 0 10px 20px -8px rgba(16, 185, 129, 0.4);
}

.btn-purple {
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
    border-color: rgba(139, 92, 246, 0.2);
}
.btn-purple:hover {
    background: var(--purple);
    color: var(--text-primary);
    box-shadow: 0 10px 20px -8px rgba(139, 92, 246, 0.4);
}

.btn-red {
    background: rgba(239, 68, 68, 0.1);
    color: var(--red);
    border-color: rgba(239, 68, 68, 0.2);
}
.btn-red:hover {
    background: var(--red);
    color: var(--text-primary);
    box-shadow: 0 10px 20px -8px rgba(239, 68, 68, 0.4);
}

.btn-orange {
    background: rgba(249, 115, 22, 0.1);
    color: var(--orange);
    border-color: rgba(249, 115, 22, 0.2);
}
.btn-orange:hover {
    background: var(--orange);
    color: var(--text-primary);
    box-shadow: 0 10px 20px -8px rgba(249, 115, 22, 0.4);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-group {
    display: flex;
    gap: 12px;
}
.btn-group-vertical {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.btn-group-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.btn-icon {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}
.form-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.select-wrapper {
    position: relative;
}
.select-wrapper::after {
    content: '▼';
    font-size: 8px;
    color: var(--text-secondary);
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}
select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}
select:focus {
    border-color: var(--cyan);
    outline: none;
    box-shadow: 0 0 0 2px var(--cyan-glow);
}

/* ==========================================================================
   DASHBOARD CARD GRID
   ========================================================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.test-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.test-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(255, 255, 255, 0.04), transparent 40%);
    z-index: 1;
    pointer-events: none;
}
.test-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.3);
}

.card-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}
.card-icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Diagnostic Glow Wrappers */
.cyan-glow { background: rgba(0, 242, 254, 0.08); color: var(--cyan); }
.test-card:hover .cyan-glow { background: var(--cyan); color: var(--bg-main); box-shadow: 0 0 16px var(--cyan); }

.emerald-glow { background: rgba(16, 185, 129, 0.08); color: var(--emerald); }
.test-card:hover .emerald-glow { background: var(--emerald); color: var(--bg-main); box-shadow: 0 0 16px var(--emerald); }

.purple-glow { background: rgba(139, 92, 246, 0.08); color: var(--purple); }
.test-card:hover .purple-glow { background: var(--purple); color: var(--text-primary); box-shadow: 0 0 16px var(--purple); }

.red-glow { background: rgba(239, 68, 68, 0.08); color: var(--red); }
.test-card:hover .red-glow { background: var(--red); color: var(--text-primary); box-shadow: 0 0 16px var(--red); }

.orange-glow { background: rgba(249, 115, 22, 0.08); color: var(--orange); }
.test-card:hover .orange-glow { background: var(--orange); color: var(--text-primary); box-shadow: 0 0 16px var(--orange); }

.test-card h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
}
.test-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    flex-grow: 1;
}
.test-card .btn {
    width: 100%;
}

/* ==========================================================================
   DIAGNOSTIC TEMPLATE SPLIT LAYOUT
   ========================================================================== */
.test-container-split {
    display: flex;
    gap: 32px;
    height: 100%;
    flex-grow: 1;
}

.control-panel {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.control-panel h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.5px;
}
.control-panel p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.display-panel {
    flex-grow: 1;
    background: rgba(10, 15, 26, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.diagnostic-readout {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.readout-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}
.readout-item .label {
    color: var(--text-secondary);
}
.readout-item .value {
    font-weight: 600;
}
.text-red { color: var(--red); }
.text-emerald { color: var(--emerald); }

/* ==========================================================================
   1. SCREEN (DEAD PIXEL) DIAGNOSTICS
   ========================================================================== */
.fullscreen-test {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    transition: background 0.15s ease-in-out;
}
#view-screen-test:not(.active) .fullscreen-test {
    display: none;
}

.fullscreen-overlay {
    text-align: center;
    max-width: 500px;
    background: rgba(10, 15, 26, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    padding: 48px;
    border-radius: 24px;
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.6);
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
    z-index: 100;
    transition: opacity 0.5s ease;
}
.fullscreen-overlay h2 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 600;
}
.fullscreen-overlay p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.instructions-overlay {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Background testing patterns styles */
.screen-pattern-grid {
    background-size: 40px 40px;
    background-image: 
        linear-gradient(to right, rgba(128,128,128,0.5) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(128,128,128,0.5) 1px, transparent 1px);
}
.screen-pattern-checkerboard {
    background-image: 
        linear-gradient(45deg, #000 25%, transparent 25%), 
        linear-gradient(-45deg, #000 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #000 75%), 
        linear-gradient(-45deg, transparent 75%, #000 75%);
    background-size: 80px 80px;
    background-position: 0 0, 0 40px, 40px -40px, -40px 0px;
    background-color: #fff;
}
.screen-pattern-hgradients {
    background: linear-gradient(to right, #000 0%, #fff 100%);
}
.screen-pattern-vgradients {
    background: linear-gradient(to bottom, #000 0%, #fff 100%);
}

/* Screen Test Floating Navigation Bar */
.screen-controls-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(11, 15, 25, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 16px;
    border-radius: 40px;
    box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.6), 0 0 1px 1px rgba(255, 255, 255, 0.05);
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.screen-controls-nav.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.screen-nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
    padding: 10px 18px;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.screen-nav-btn:hover {
    color: var(--cyan);
    background: rgba(0, 242, 254, 0.08);
    text-shadow: 0 0 8px rgba(0, 242, 254, 0.2);
}
.screen-nav-btn svg {
    width: 14px;
    height: 14px;
}
.screen-nav-divider {
    width: 1px;
    height: 22px;
    background: rgba(255, 255, 255, 0.12);
    margin: 0 6px;
}
.screen-nav-btn.exit-btn {
    color: var(--red);
}
.screen-nav-btn.exit-btn:hover {
    color: #ffffff;
    background: var(--red);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.4);
}

/* ==========================================================================
   2. TOUCHSCREEN & MULTITOUCH TEST
   ========================================================================== */
.touch-panel-container {
    padding: 0;
}
#touch-canvas-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    flex-grow: 1;
    touch-action: none;
}
#touch-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    touch-action: none;
}
.touch-window-tip {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 10px 16px;
    background: rgba(10, 15, 26, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 10;
}

/* ==========================================================================
   3. AUDIO DIAGNOSTIC TEST & FREQUENCY VISUALIZER
   ========================================================================== */
.audio-controls-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.audio-controls-block h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.audio-info {
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-muted);
}

/* Audio mode selector segmented styling */
.audio-mode-selector {
    display: flex;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 4px;
}
.mode-btn {
    flex-grow: 1;
    text-align: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 0;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.mode-btn.active {
    color: var(--cyan);
    background: rgba(0, 242, 254, 0.08);
    box-shadow: inset 0 0 6px rgba(0, 242, 254, 0.15);
    border: 1px solid rgba(0, 242, 254, 0.2);
}

.visualizer-panel {
    padding: 24px;
    gap: 20px;
}
.visualizer-panel .panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.visualizer-panel .panel-header h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
}
.visualizer-status {
    font-size: 11px;
    font-weight: 600;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(0, 242, 254, 0.08);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(0, 242, 254, 0.15);
}

.visualizer-container {
    flex-grow: 1;
    background: #060910;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}
#audio-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ==========================================================================
   4. WEBCAM DIAGNOSTIC TEST
   ========================================================================== */
.webcam-panel {
    padding: 24px;
    gap: 20px;
}
.video-container {
    flex-grow: 1;
    background: #060910;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
#webcam-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: none;
    transition: transform var(--transition-normal);
}
#webcam-video.mirrored {
    transform: scaleX(-1);
}

.video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
}
.video-placeholder svg {
    width: 64px;
    height: 64px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}
.video-placeholder span {
    font-size: 14px;
    font-weight: 500;
}

.snapshot-gallery-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.snapshot-gallery-section h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.snapshot-gallery {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
    min-height: 80px;
}
.gallery-empty {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 80px;
    text-align: center;
    width: 100%;
}
.snapshot-item {
    width: 110px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    position: relative;
    cursor: pointer;
}
.snapshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.snapshot-item::after {
    content: '🔍';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.snapshot-item:hover::after {
    opacity: 1;
}

/* ==========================================================================
   5. KEYBOARD AND MOUSE DIAGNOSTIC PANEL
   ========================================================================== */
.keyboard-view-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
}

.keyboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 16px 24px;
    border-radius: 16px;
}

.layout-toggle-wrapper {
    display: flex;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 4px;
}
.layout-toggle-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.layout-toggle-btn svg {
    width: 16px;
    height: 16px;
}
.layout-toggle-btn.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.mouse-tester {
    display: flex;
    align-items: center;
    gap: 12px;
}
.mouse-element {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}
.mouse-element.active {
    color: var(--emerald);
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.2);
}
.mouse-coord {
    font-family: monospace;
    font-size: 12px;
    color: var(--text-muted);
    min-width: 100px;
}

.keyboard-body-wrapper {
    flex-grow: 1;
    background: #080d16;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: center;
}

.keyboard-intercept-banner {
    background: rgba(249, 115, 22, 0.05);
    border: 1px solid rgba(249, 115, 22, 0.15);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 12px;
    color: var(--orange);
    text-align: center;
}

/* The actual Virtual Keyboard Grid styling */
.keyboard-grid {
    display: flex;
    gap: 16px;
    user-select: none;
    margin: 0 auto;
    width: 100%;
    max-width: 1240px;
    align-items: flex-start;
}

.kbd-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.kbd-block.main-block {
    flex-grow: 1;
}

.kbd-block.nav-block {
    width: 135px;
    flex-shrink: 0;
}

.kbd-block.num-block {
    width: 175px;
    flex-shrink: 0;
}

.keyboard-row {
    display: flex;
    gap: 5px;
    width: 100%;
}

.kbd-key {
    background: linear-gradient(135deg, #090f1d 0%, #121b2d 100%);
    border: 1px solid rgba(0, 242, 254, 0.2);
    border-bottom: 2px solid rgba(0, 242, 254, 0.35);
    border-radius: 6px;
    color: #e0f2fe;
    font-family: var(--font-body);
    font-size: 11px;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 42px;
    flex-grow: 1;
    flex-shrink: 0;
    cursor: default;
    transition: all 0.08s cubic-bezier(0.2, 0.8, 0.2, 1);
    text-align: center;
    position: relative;
    padding: 2px;
    box-shadow: 0 2px 4px rgba(0, 242, 254, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Secondary labels for keys that have different shift characters */
.kbd-key span {
    font-size: 9px;
    color: #00f2fe;
    opacity: 0.8;
    margin-top: 1px;
}

/* Visual Key Size ratios */
.kbd-key.w-1-25 { flex-grow: 1.25; }
.kbd-key.w-1-5 { flex-grow: 1.5; }
.kbd-key.w-1-75 { flex-grow: 1.75; }
.kbd-key.w-2 { flex-grow: 2.0; }
.kbd-key.w-2-25 { flex-grow: 2.25; }
.kbd-key.w-2-5 { flex-grow: 2.5; }
.kbd-key.w-2-75 { flex-grow: 2.75; }
.kbd-key.w-6 { flex-grow: 6.0; }
.kbd-key.w-grow { flex-grow: 99; } /* Autogrow for spaces */

/* Spacer items to make gaps in layout */
.kbd-spacer {
    flex-grow: 0.5;
    flex-shrink: 0;
    pointer-events: none;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}
.kbd-spacer.w-1 { flex-grow: 1.0; }
.kbd-spacer.w-1-5 { flex-grow: 1.5; }
.kbd-spacer.w-2 { flex-grow: 2.0; }

/* Active & Success states for virtual keys - Cyberpunk Neon Glow */
.kbd-key.state-pressed {
    background: linear-gradient(135deg, #ff0055 0%, #ff5500 100%) !important;
    border-color: #ffffff !important;
    border-bottom-width: 1px !important;
    color: #ffffff !important;
    box-shadow: 0 0 18px #ff0055, inset 0 1px 0 rgba(255,255,255,0.2) !important;
    transform: translateY(2px);
}
.kbd-key.state-pressed span {
    color: #ffffff !important;
}

.kbd-key.state-tested {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(16, 185, 129, 0.18) 100%);
    border-color: rgba(16, 185, 129, 0.8);
    border-bottom: 2px solid #10b981;
    color: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.25), inset 0 1px 0 rgba(16, 185, 129, 0.1);
}
.kbd-key.state-tested span {
    color: #10b981 !important;
}

.kbd-key.state-tested.state-pressed {
    background: linear-gradient(135deg, #ff0055 0%, #ff5500 100%) !important;
    color: #fff !important;
}

.keyboard-footer-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 12px;
}
.history-log {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 13px;
}
.history-log .label {
    color: var(--text-muted);
}
.history-log .value {
    font-weight: 600;
    color: var(--orange);
    background: rgba(249, 115, 22, 0.08);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
}
.layout-warning {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==========================================================================
   SCROLLBAR & UTILITY ANIMATIONS
   ========================================================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 0.45;
        transform: scale(1.15);
    }
}
.glow-orb-1 { animation: pulse-glow 12s ease-in-out infinite; }
.glow-orb-2 { animation: pulse-glow 15s ease-in-out infinite 2s; }
.glow-orb-3 { animation: pulse-glow 10s ease-in-out infinite 1s; }

/* ==========================================================================
   RESPONSIVE OVERRIDES
   ========================================================================== */
@media (max-width: 1200px) {
    #app-root {
        width: 100vw;
        height: 100vh;
        border-radius: 0;
        border: none;
    }
}

@media (max-width: 992px) {
    #app-root {
        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;
        justify-content: space-between;
    }
    .sidebar-brand {
        margin-bottom: 0;
    }
    .sidebar-nav {
        flex-direction: row;
        gap: 8px;
        flex-grow: 0;
    }
    .nav-section-title {
        display: none;
    }
    .sidebar-footer {
        display: none;
    }
    .content-area {
        padding: 24px;
    }
    .test-container-split {
        flex-direction: column;
    }
    .control-panel {
        width: 100%;
    }
}