/**
 * Usability Section Styles
 * Professional and interactive design for usability test results
 * Unique prefix: usability-* to avoid conflicts
 */

.usability-section {
    padding: 20px 0;
}

/* Score Overview - Unique gradient for usability */
.usability-score-overview-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4ff 100%);
    border: 1px solid #e0e7ff;
    padding: 32px;
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.08);
    transition: all 0.3s ease;
}

.usability-score-overview-card:hover {
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.12);
}

.usability-score-circle-container {
    position: relative;
    display: inline-block;
    width: 140px;
    height: 140px;
}

.usability-score-circle-container svg {
    position: absolute;
    top: 0;
    left: 0;
}

.usability-score-text-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 100%;
}

.usability-score-number {
    font-size: 44px;
    font-weight: 800;
    line-height: 1;
    color: #1a365d;
    text-shadow: none;
}

.usability-score-label {
    font-size: 14px;
    opacity: 0.7;
    margin-top: 4px;
    color: #475569;
    font-weight: 600;
}

.usability-section-title {
    color: #1a365d;
    font-weight: 700;
    font-size: 24px;
    margin-bottom: 0;
}

.usability-score-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.usability-stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #2d3748;
    background: #f7fafc;
    padding: 14px 18px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.usability-stat-item:hover {
    background: white;
    border-color: #cbd5e0;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.usability-stat-icon-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: bold;
    flex-shrink: 0;
}

.usability-stat-icon-circle.success {
    background: rgba(34, 197, 94, 0.12);
    color: #22863a;
}

.usability-stat-icon-circle.danger {
    background: rgba(239, 68, 68, 0.12);
    color: #cb2431;
}

.usability-stat-icon-circle.info {
    background: rgba(251, 191, 36, 0.12);
    color: #9e6200;
}

.usability-stat-details {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.usability-stat-value {
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
    color: #1a365d;
}

.usability-stat-label-small {
    font-size: 12px;
    opacity: 0.75;
    color: #475569;
    font-weight: 600;
}

.usability-progress-modern {
    background: #e2e8f0;
    border-radius: 12px;
    height: 8px;
    overflow: hidden;
    position: relative;
}

.usability-progress-bar-modern {
    height: 100%;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0;
    transition: width 1s ease-in-out;
    position: relative;
    overflow: hidden;
}

.usability-progress-bar-modern.excellent {
    background: #10b981;
}

.usability-progress-bar-modern.good {
    background: #0ea5e9;
}

.usability-progress-bar-modern.fair {
    background: #f59e0b;
}

.usability-progress-bar-modern.poor {
    background: #ef4444;
}

.usability-progress-label {
    font-weight: 700;
    color: white;
    font-size: 14px;
    text-shadow: none;
    display: none;
}

/* Analysis Cards */
.usability-analysis-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.usability-analysis-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.12);
}

.usability-card-header-custom {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    padding: 20px 25px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: none;
}

.usability-card-header-custom i {
    font-size: 26px;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.usability-card-header-custom h4 {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    color: white;
    flex: 1;
}

.usability-card-body {
    padding: 25px;
}

/* Test Items */
.usability-test-item {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    transition: all 0.3s;
}

.usability-test-item.pass {
    border-left: 5px solid #22c55e;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

.usability-test-item.fail {
    border-left: 5px solid #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
}

.usability-test-item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateX(5px);
}

.usability-test-item.pass:hover {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
}

.usability-test-item.fail:hover {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
}

.usability-test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.usability-test-name {
    font-weight: 700;
    color: #1f2937;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.usability-test-name i {
    font-size: 20px;
}

.usability-test-score {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.usability-test-reason {
    font-size: 14px;
    color: #374151;
    line-height: 1.6;
    margin-bottom: 10px;
    font-weight: 500;
}

.usability-test-recommendation {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid #f59e0b;
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 13px;
    color: #92400e;
    margin-top: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.usability-test-recommendation i {
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Priority Badges */
.usability-priority-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.usability-priority-badge.high {
    background: #fee2e2;
    color: #991b1b;
}

.usability-priority-badge.medium {
    background: #fef3c7;
    color: #92400e;
}

.usability-priority-badge.low {
    background: #dbeafe;
    color: #1e40af;
}

/* Details Grid */
.usability-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.usability-detail-item {
    background: #f9fafb;
    padding: 12px 15px;
    border-radius: 8px;
    border-left: 3px solid #6366f1;
}

.usability-detail-label {
    font-size: 11px;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    font-weight: 600;
}

.usability-detail-value {
    font-size: 18px;
    font-weight: 700;
    color: #1f2937;
}

/* Sample Targets Display */
.usability-sample-targets {
    margin-top: 15px;
}

.usability-sample-targets-title {
    font-size: 14px;
    font-weight: 700;
    color: #374151;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.usability-target-item {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.usability-target-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    flex-shrink: 0;
}

.usability-target-info {
    flex: 1;
}

.usability-target-text {
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 4px;
    font-size: 14px;
}

.usability-target-dimensions {
    font-size: 12px;
    color: #6b7280;
}

.usability-target-dimensions strong {
    color: #ef4444;
    font-weight: 700;
}

/* Summary Stats */
.usability-summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.usability-summary-stat-card {
    background: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 18px;
    text-align: center;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.usability-summary-stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.2);
    border-color: #6366f1;
}

.usability-summary-stat-icon {
    font-size: 28px;
    color: #6366f1;
    margin-bottom: 8px;
}

.usability-summary-stat-value {
    font-size: 28px;
    font-weight: 800;
    color: #1f2937;
    line-height: 1;
    margin-bottom: 6px;
}

.usability-summary-stat-label {
    font-size: 12px;
    font-weight: 700;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Test Group Headers */
.usability-test-group-header {
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid #6366f1;
}

.usability-test-group-header i {
    font-size: 24px;
    color: #6366f1;
}

.usability-test-group-header h5 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: #1f2937;
}

/* Status Icons */
.usability-status-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.usability-status-icon.pass {
    background: #22c55e;
    color: white;
}

.usability-status-icon.fail {
    background: #ef4444;
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .usability-score-overview-card {
        padding: 24px 16px;
    }
    
    .usability-score-stats {
        flex-direction: row;
        gap: 10px;
        justify-content: flex-start;
    }
    
    .usability-stat-item {
        padding: 12px 14px;
        flex: 1;
        min-width: 0;
        font-size: 13px;
    }
    
    .usability-stat-icon-circle {
        width: 34px;
        height: 34px;
        font-size: 16px;
    }
    
    .usability-stat-value {
        font-size: 18px;
    }
    
    .usability-stat-label-small {
        font-size: 11px;
    }
    
    .usability-score-number {
        font-size: 38px;
    }
    
    .usability-section-title {
        font-size: 20px;
    }
    
    .usability-card-header-custom h4 {
        font-size: 18px;
    }
    
    .usability-details-grid {
        grid-template-columns: 1fr;
    }
    
    .usability-summary-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Animations */
@keyframes usabilitySlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.usability-analysis-card {
    animation: usabilitySlideIn 0.5s ease-out;
}

/* Loading Spinner */
.usability-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    border-top-color: #6366f1;
    animation: usabilitySpin 1s linear infinite;
}

@keyframes usabilitySpin {
    to {
        transform: rotate(360deg);
    }
}

/* Tooltip */
.usability-tooltip {
    position: relative;
    cursor: help;
}

.usability-tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.usability-expandable-card .usability-card-clickable,
.usability-expandable-card .usability-device-preview-header {
    cursor: pointer;
    transition: background 0.2s ease;
}

.usability-expandable-card .usability-device-preview-header:hover {
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.usability-expandable-card .usability-card-header-custom.usability-card-clickable:hover {
    background: linear-gradient(135deg, #5558e3 0%, #7c4fe6 100%);
}

.usability-card-info-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

.usability-card-hint {
    font-size: 0.75em;
    color: #6366f1;
    font-weight: 500;
    opacity: 1;
    transition: opacity 0.5s ease;
    white-space: nowrap;
    animation: usabilityHintPulse 2s ease-in-out infinite;
}

.usability-card-hint.usability-hint-fade {
    opacity: 0;
    pointer-events: none;
}

@keyframes usabilityHintPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.usability-card-info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    font-size: 0.9em;
    font-weight: bold;
    transition: all 0.3s ease;
    cursor: pointer;
}

.usability-card-info-icon:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.usability-card-info-icon.usability-info-active {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    transform: scale(1.1);
}

.usability-card-info-icon span {
    font-style: normal;
    line-height: 1;
}

.usability-card-explanation-panel {
    padding: 20px;
    background: linear-gradient(135deg, #f0f4ff 0%, #f8fafc 100%);
    border-top: 1px solid #e0e7ff;
    border-bottom: 1px solid #e0e7ff;
    animation: usabilityPanelSlide 0.3s ease forwards;
}

@keyframes usabilityPanelSlide {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 500px;
    }
}

.usability-explanation-header {
    margin-bottom: 12px;
}

.usability-explanation-importance {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.usability-explanation-desc {
    color: #2c3e50;
    font-size: 0.95em;
    line-height: 1.7;
    margin: 0 0 15px 0;
}

.usability-explanation-impact {
    padding: 12px 15px;
    background: linear-gradient(145deg, #fff3cd 0%, #fffbf0 100%);
    border-left: 4px solid #f59e0b;
    border-radius: 0 8px 8px 0;
    margin-bottom: 15px;
    font-size: 0.9em;
    color: #856404;
    line-height: 1.6;
}

.usability-explanation-metrics {
    padding: 12px 15px;
    background: linear-gradient(145deg, #d1ecf1 0%, #e8f4f8 100%);
    border-left: 4px solid #17a2b8;
    border-radius: 0 8px 8px 0;
    font-size: 0.9em;
    color: #0c5460;
}

.usability-explanation-metrics ul {
    margin: 10px 0 0 0;
    padding-left: 20px;
}

.usability-explanation-metrics li {
    margin: 8px 0;
    line-height: 1.5;
}

.usability-device-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.usability-device-preview-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4ff 100%);
    border-radius: 20px;
    margin-bottom: 30px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.1);
    border: 1px solid #e0e7ff;
}

.usability-device-preview-header {
    padding: 24px 32px;
    border-bottom: 1px solid #e0e7ff;
}

.usability-device-preview-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.usability-device-preview-title i {
    font-size: 24px;
    color: #6366f1;
}

.usability-device-preview-title h4 {
    margin: 0;
    color: #1a365d;
    font-size: 20px;
    font-weight: 700;
}

.usability-device-preview-subtitle {
    color: #64748b;
    font-size: 14px;
    margin-left: 36px;
}

.usability-device-preview-body {
    padding: 40px 32px 50px;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.03) 100%);
}

.usability-device-showcase {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 40px;
    perspective: 1000px;
}

.usability-device-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.usability-device-item.usability-device-hover {
    transform: translateY(-10px) scale(1.02);
}

.usability-device-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 8px 16px;
    background: white;
    border-radius: 20px;
    color: #374151;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
}

.usability-device-label i {
    font-size: 16px;
    color: #6366f1;
}

.usability-device-desktop {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-desktop-bezel {
    width: 320px;
    height: 200px;
    background: linear-gradient(145deg, #e8eaed 0%, #c4c7cc 100%);
    border-radius: 12px;
    padding: 8px;
    box-shadow: 
        0 0 0 2px #b8bcc2,
        0 10px 40px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    position: relative;
}

.usability-device-desktop-camera {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #374151;
    border-radius: 50%;
    border: 1px solid #4b5563;
}

.usability-device-desktop-screen {
    width: 100%;
    height: 100%;
    background: #f8fafc;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.usability-device-desktop-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.usability-device-desktop-screen:not(.usability-device-skeleton-active) img {
    opacity: 1;
}

.usability-device-desktop-screen:not(.usability-device-skeleton-active) .usability-device-skeleton-loader {
    opacity: 0;
}

.usability-device-desktop-stand {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-desktop-stand-neck {
    width: 60px;
    height: 30px;
    background: linear-gradient(180deg, #c4c7cc 0%, #9ca3af 100%);
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
}

.usability-device-desktop-stand-base {
    width: 120px;
    height: 12px;
    background: linear-gradient(180deg, #9ca3af 0%, #6b7280 100%);
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.usability-device-tablet {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-tablet-bezel {
    width: 180px;
    height: 240px;
    background: linear-gradient(145deg, #e8eaed 0%, #c4c7cc 100%);
    border-radius: 16px;
    padding: 12px 10px;
    box-shadow: 
        0 0 0 2px #b8bcc2,
        0 15px 50px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-tablet-camera {
    width: 6px;
    height: 6px;
    background: #374151;
    border-radius: 50%;
    border: 1px solid #4b5563;
    margin-bottom: 6px;
}

.usability-device-tablet-screen {
    width: 100%;
    flex: 1;
    background: #f8fafc;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.usability-device-tablet-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.usability-device-tablet-screen:not(.usability-device-skeleton-active) img {
    opacity: 1;
}

.usability-device-tablet-screen:not(.usability-device-skeleton-active) .usability-device-skeleton-loader {
    opacity: 0;
}

.usability-device-tablet-button {
    width: 24px;
    height: 24px;
    background: linear-gradient(145deg, #d1d5db 0%, #9ca3af 100%);
    border-radius: 50%;
    margin-top: 8px;
    border: 1px solid #9ca3af;
}

.usability-device-phone {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-phone-bezel {
    width: 120px;
    height: 250px;
    background: linear-gradient(145deg, #374151 0%, #1f2937 100%);
    border-radius: 24px;
    padding: 8px 6px 12px;
    box-shadow: 
        0 0 0 2px #4b5563,
        0 20px 60px rgba(0, 0, 0, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.usability-device-phone-notch {
    width: 60px;
    height: 18px;
    background: #1f2937;
    border-radius: 0 0 12px 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: 4px;
    position: relative;
    z-index: 2;
}

.usability-device-phone-speaker {
    width: 28px;
    height: 4px;
    background: #374151;
    border-radius: 2px;
}

.usability-device-phone-camera {
    width: 6px;
    height: 6px;
    background: #1f2937;
    border-radius: 50%;
    border: 1px solid #374151;
}

.usability-device-phone-screen {
    width: 100%;
    flex: 1;
    background: #f8fafc;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    margin-top: -12px;
}

.usability-device-phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.usability-device-phone-screen:not(.usability-device-skeleton-active) img {
    opacity: 1;
}

.usability-device-phone-screen:not(.usability-device-skeleton-active) .usability-device-skeleton-loader {
    opacity: 0;
}

.usability-device-phone-homebar {
    width: 40px;
    height: 4px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 2px;
    margin-top: 8px;
}

.usability-device-skeleton-loader {
    position: absolute;
    inset: 0;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: opacity 0.5s ease;
    background: #f8fafc;
}

.usability-device-skeleton-header {
    height: 20px;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: usabilityDeviceSkeletonShimmer 1.5s infinite;
    border-radius: 4px;
}

.usability-device-skeleton-nav {
    height: 12px;
    width: 80%;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: usabilityDeviceSkeletonShimmer 1.5s infinite 0.1s;
    border-radius: 4px;
}

.usability-device-skeleton-hero {
    height: 40px;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: usabilityDeviceSkeletonShimmer 1.5s infinite 0.2s;
    border-radius: 4px;
}

.usability-device-skeleton-hero.tall {
    height: 60px;
}

.usability-device-skeleton-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.usability-device-skeleton-line {
    height: 10px;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: usabilityDeviceSkeletonShimmer 1.5s infinite 0.3s;
    border-radius: 4px;
}

.usability-device-skeleton-line.short {
    width: 60%;
}

@keyframes usabilityDeviceSkeletonShimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

@media (max-width: 992px) {
    .usability-device-showcase {
        gap: 24px;
    }
    
    .usability-device-desktop-bezel {
        width: 260px;
        height: 160px;
    }
    
    .usability-device-tablet-bezel {
        width: 150px;
        height: 200px;
    }
    
    .usability-device-phone-bezel {
        width: 100px;
        height: 210px;
    }
}

@media (max-width: 768px) {
    .usability-device-showcase {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .usability-device-preview-body {
        padding: 30px 20px 40px;
    }
    
    .usability-device-desktop-bezel {
        width: 280px;
        height: 175px;
    }
    
    .usability-device-tablet-bezel {
        width: 160px;
        height: 220px;
    }
    
    .usability-device-phone-bezel {
        width: 110px;
        height: 230px;
    }
}