/* ============================================================
   3D AE VIEWER - STYLES
   Clean, modern, accessible design
   ============================================================ */

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #1a1a1a;
    --color-surface: #2a2a2a;
    --color-surface-hover: #353535;
    --color-border: #404040;
    --color-text: #e0e0e0;
    --color-text-dim: #a0a0a0;
    --color-accent: #4a9eff;
    --color-accent-hover: #6bb0ff;

    /* Severity colors */
    --color-low: #4caf50;
    --color-medium: #ff9800;
    --color-high: #f44336;

    /* Layout */
    --sidebar-width: 360px;
    --header-height: 60px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    overflow: hidden;
    height: 100vh;
}

/* Accessibility - visually hidden but screen-reader accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Main layout */
.container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* Sidebar - Event list */
.sidebar {
    width: var(--sidebar-width);
    min-width: 320px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.event-count {
    font-size: 0.875rem;
    color: var(--color-text-dim);
}

/* Filters */
.filters {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
    flex-shrink: 0;
}

/* Filter toggle button (hidden on desktop, shown on mobile) */
.filter-toggle {
    display: none;
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    font-size: 0.875rem;
    cursor: pointer;
    text-align: left;
    margin-bottom: var(--spacing-sm);
    transition: background var(--transition-fast);
}

.filter-toggle:hover {
    background: var(--color-surface-hover);
}

.filter-toggle::after {
    content: '▼';
    float: right;
    transition: transform var(--transition-fast);
}

.filter-toggle.collapsed::after {
    transform: rotate(-90deg);
}

.filter-content {
    /* Will be toggled on mobile */
}

.filter-group {
    margin-bottom: var(--spacing-md);
}

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-group > label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dim);
}

.checkbox-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.checkbox-group input[type="checkbox"]:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Severity dots */
.severity-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.severity-dot.severity-low {
    background: var(--color-low);
}

.severity-dot.severity-medium {
    background: var(--color-medium);
}

.severity-dot.severity-high {
    background: var(--color-high);
}

/* Search input */
#searchInput {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast);
}

#searchInput:focus {
    outline: none;
    border-color: var(--color-accent);
}

#searchInput::placeholder {
    color: var(--color-text-dim);
}

/* Event list */
.event-list {
    flex: 1;
    min-height: 0; /* Critical for flex scrolling */
    overflow-y: auto;
    overflow-x: hidden;
    list-style: none;
    padding: var(--spacing-sm);
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    overscroll-behavior: contain; /* Prevent scroll chaining on mobile */
}

/* List section header */
.list-header {
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    background: var(--color-surface);
    border-left: 3px solid var(--color-accent);
    color: var(--color-text);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: default;
}

.list-header:first-child {
    margin-top: 0;
}

.event-item {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.event-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.event-item:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.event-item.selected {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.2);
}

.event-item.highlighted {
    border-color: var(--color-accent);
    box-shadow: 0 0 12px rgba(74, 158, 255, 0.4);
}

.event-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.event-id {
    font-weight: 600;
    font-size: 0.95rem;
}

.event-severity {
    margin-left: auto;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.event-severity.low {
    background: rgba(76, 175, 80, 0.2);
    color: var(--color-low);
}

.event-severity.medium {
    background: rgba(255, 152, 0, 0.2);
    color: var(--color-medium);
}

.event-severity.high {
    background: rgba(244, 67, 54, 0.2);
    color: var(--color-high);
}

.event-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 12px;
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.event-details .label {
    font-weight: 500;
}

.event-details .value {
    text-align: right;
}

/* Upload section - Collapsible */
.upload-section {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    flex: 0 1 auto;
    flex-shrink: 1;
}

/* Upload toggle button */
.upload-toggle {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border: none;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.upload-toggle:hover {
    background: var(--color-surface-hover);
}

.upload-toggle::after {
    content: '▼';
    transition: transform var(--transition-fast);
    font-size: 0.75rem;
}

.upload-toggle.collapsed::after {
    transform: rotate(-90deg);
}

/* Upload content - collapsible */
.upload-content {
    padding: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    transition: max-height var(--transition-normal), opacity var(--transition-normal);
}

.upload-content.collapsed {
    display: none;
}

.upload-label {
    display: block;
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 2px dashed var(--color-border);
    border-radius: 6px;
    text-align: center;
    cursor: not-allowed;
    color: var(--color-text-dim);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

#modelUpload {
    display: none;
}

.upload-note {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    text-align: center;
    font-style: italic;
}

/* Canvas container */
.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#canvas3d {
    width: 100%;
    height: 100%;
    display: block;
}

/* Tooltip */
.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 6px;
    font-size: 0.875rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 1000;
    max-width: 250px;
    border: 1px solid var(--color-border);
}

.tooltip.visible {
    opacity: 1;
}

.tooltip-header {
    font-weight: 600;
    margin-bottom: 4px;
}

.tooltip-detail {
    font-size: 0.75rem;
    color: #ccc;
    line-height: 1.4;
}

/* Scene controls */
.scene-controls {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
}

.scene-controls button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(42, 42, 42, 0.9);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.scene-controls button:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
}

.scene-controls button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.scene-controls button:active {
    transform: translateY(1px);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: 50vh;
        min-height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        /* Ensure proper flex layout on mobile */
        display: flex;
        flex-direction: column;
        /* Prevent overflow issues */
        overflow: hidden;
    }

    .sidebar-header {
        /* Header stays fixed */
        flex-shrink: 0;
        padding: var(--spacing-md);
    }

    .sidebar-header h1 {
        font-size: 1.25rem;
    }

    .filters {
        /* Filters take minimal space */
        flex-shrink: 0;
        padding: var(--spacing-sm) var(--spacing-md);
        max-height: none;
        overflow: visible;
    }

    /* Show filter toggle on mobile */
    .filter-toggle {
        display: block;
    }

    /* Collapsible filter content on mobile */
    .filter-content.collapsed {
        display: none;
    }

    .filter-group {
        margin-bottom: var(--spacing-sm);
    }

    .checkbox-group {
        gap: var(--spacing-sm);
    }

    .checkbox-group label {
        font-size: 0.8rem;
    }

    /* Event list gets ALL remaining space and is scrollable */
    .event-list {
        flex: 1;
        min-height: 0; /* Important for flex scroll */
        overflow-y: auto;
        -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
        padding: var(--spacing-sm);
    }

    .event-item {
        padding: var(--spacing-sm) var(--spacing-md);
        margin-bottom: var(--spacing-sm);
    }

    .event-item:hover {
        transform: none; /* Disable transform on mobile */
    }

    /* Upload section - Show toggle, collapse content by default on mobile */
    .upload-section {
        display: block; /* Show the section */
    }

    .upload-toggle {
        display: flex; /* Show toggle button */
    }

    .upload-content {
        display: none; /* Hide content by default on mobile */
        max-height: 30vh; /* Limit height on mobile if expanded */
    }

    .upload-content:not(.collapsed) {
        display: block; /* Show when not collapsed */
    }

    .upload-label {
        padding: var(--spacing-sm);
        font-size: 0.75rem;
        margin-bottom: 4px;
    }

    .upload-note {
        font-size: 0.7rem;
    }

    .canvas-container {
        height: 50vh;
        min-height: 300px;
    }

    .scene-controls {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }

    .scene-controls button {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
}

/* Extra small screens - phones in portrait */
@media (max-width: 480px) {
    .container {
        /* Ensure container uses full viewport height */
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile browsers */
    }

    .sidebar {
        height: 40vh;
        height: 40dvh; /* Dynamic viewport height */
        min-height: 200px;
        max-height: 50vh;
        /* Force visibility */
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    .sidebar-header {
        padding: 10px 12px;
        flex-shrink: 0;
    }

    .sidebar-header h1 {
        font-size: 1rem;
        margin-bottom: 4px;
    }

    .event-count {
        font-size: 0.75rem;
    }

    .filters {
        padding: 8px 12px;
        flex-shrink: 0;
    }

    .filter-group > label {
        font-size: 0.75rem;
        margin-bottom: 4px;
    }

    .checkbox-group {
        flex-direction: column;
        gap: 4px;
    }

    .checkbox-group label {
        font-size: 0.75rem;
    }

    #searchInput {
        font-size: 0.75rem;
        padding: 6px;
    }

    .event-list {
        padding: 6px;
        flex: 1;
        min-height: 80px; /* Ensure minimum scrollable area */
    }

    .event-item {
        padding: 8px;
        margin-bottom: 4px;
    }

    .event-id {
        font-size: 0.85rem;
    }

    .event-details {
        font-size: 0.7rem;
        gap: 2px 6px;
    }

    /* Hide upload section on very small screens */
    .upload-section {
        display: none;
    }

    .canvas-container {
        height: 60vh;
        height: 60dvh; /* Dynamic viewport height */
        min-height: 250px;
        /* Ensure canvas is visible */
        display: block !important;
        visibility: visible !important;
    }

    .scene-controls {
        flex-direction: column;
        gap: 4px;
        top: 6px;
        right: 6px;
    }

    .scene-controls button {
        padding: 6px;
        font-size: 0.65rem;
    }
}

/* Very narrow phones - iPhone 12 mini, Galaxy S24 FE */
@media (max-width: 390px) {
    body {
        overflow: hidden;
        height: 100vh;
        height: 100dvh;
    }

    .container {
        height: 100vh;
        height: 100dvh;
        overflow: hidden;
    }

    .sidebar {
        height: 35vh;
        height: 35dvh;
        min-height: 180px;
        max-height: 40vh;
    }

    .sidebar-header {
        padding: 8px 10px;
    }

    .sidebar-header h1 {
        font-size: 0.95rem;
        margin-bottom: 2px;
    }

    .event-count {
        font-size: 0.7rem;
    }

    .filters {
        padding: 6px 10px;
    }

    .filter-toggle {
        padding: 6px;
        font-size: 0.75rem;
    }

    .filter-group {
        margin-bottom: 6px;
    }

    .event-list {
        padding: 4px;
        min-height: 60px;
    }

    .event-item {
        padding: 6px;
        margin-bottom: 3px;
    }

    .canvas-container {
        height: 65vh;
        height: 65dvh;
        min-height: 300px;
    }
}

/* Scrollbar styling */
.event-list::-webkit-scrollbar {
    width: 8px;
}

.event-list::-webkit-scrollbar-track {
    background: var(--color-bg);
}

.event-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.event-list::-webkit-scrollbar-thumb:hover {
    background: #505050;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Loading state */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-dim);
    font-style: italic;
}