/**
 * Shader Background Integration Styles
 * Ensures shader canvas works properly with existing layout
 */

/* Shader canvas base styling */
#shader-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.5s ease;
}

/* When shaders are disabled, fade out */
#shader-background.disabled {
    opacity: 0;
}

/* Ensure body allows shader background to show through */
body {
    position: relative;
    background: transparent;
}

/* Make sure main content areas have proper backdrop for readability */
.view-container,
.site-header,
.site-footer {
    position: relative;
    background: transparent;
}

/* Ensure glass-morphism panels work well with shaders */
.glass-card,
.deity-card,
.card {
    background: rgba(26, 31, 58, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Hero sections need stronger background for readability */
.hero-section {
    background: rgba(26, 31, 58, 0.75);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

/* Improve text readability over shaders */
.glass-card h1,
.glass-card h2,
.glass-card h3,
.hero-section h1,
.hero-section h2,
.hero-section h3 {
    text-shadow:
        0 0 20px rgba(0, 0, 0, 0.8),
        0 2px 4px rgba(0, 0, 0, 0.9),
        0 0 10px rgba(var(--color-primary-rgb), 0.5);
}

/* Shader controls panel */
.shader-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(26, 31, 58, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.shader-controls:hover {
    opacity: 1;
}

.shader-controls button {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.shader-controls button:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.shader-controls button.active {
    background: var(--color-primary);
    color: white;
}

.shader-intensity-slider {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.shader-intensity-slider label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.shader-intensity-slider input[type="range"] {
    width: 150px;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--color-border);
    outline: none;
}

.shader-intensity-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.shader-intensity-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--color-primary);
}

.shader-intensity-slider input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.shader-intensity-slider input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--color-primary);
}

.shader-info {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    padding: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

.shader-info .fps {
    color: var(--color-primary);
    font-weight: bold;
}

.shader-info .fps.low {
    color: #ef4444;
}

.shader-info .fps.good {
    color: #22c55e;
}

/* Performance warning */
.shader-performance-warning {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1001;
    background: rgba(239, 68, 68, 0.95);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 300px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.shader-performance-warning button {
    background: white;
    color: #ef4444;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

/* Mobile optimizations */
@media (max-width: 768px) {
    /* Hide shader controls on mobile by default */
    .shader-controls {
        bottom: 10px;
        right: 10px;
        padding: var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .shader-intensity-slider input[type="range"] {
        width: 100px;
    }

    /* Reduce shader quality on mobile automatically */
    #shader-background {
        opacity: 0.8;
    }

    /* Stronger backgrounds on mobile for readability */
    .glass-card,
    .deity-card,
    .card {
        background: rgba(26, 31, 58, 0.92);
    }

    .hero-section {
        background: rgba(26, 31, 58, 0.88);
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    #shader-background {
        display: none;
    }

    .shader-controls {
        display: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .glass-card,
    .deity-card,
    .card,
    .hero-section {
        background: rgba(26, 31, 58, 0.98);
    }
}

/* Print styles */
@media print {
    #shader-background,
    .shader-controls {
        display: none !important;
    }
}

/* Loading state for shader */
#shader-background.loading {
    opacity: 0;
}

#shader-background.loaded {
    opacity: 1;
    transition: opacity 0.8s ease;
}

/* Fallback gradient when WebGL not supported */
body.no-webgl {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
}

body.no-webgl #shader-background {
    display: none;
}

/* Theme-specific fallbacks */
body.no-webgl[data-shader-theme="water"] {
    background: linear-gradient(135deg, #0a1628 0%, #0d3d56 50%, #1a5f7a 100%);
}

body.no-webgl[data-shader-theme="fire"] {
    background: linear-gradient(135deg, #1a0a05 0%, #3d1f0d 50%, #5a2f1a 100%);
}

body.no-webgl[data-shader-theme="night"] {
    background: linear-gradient(135deg, #05050a 0%, #0a0a1e 50%, #0f0f2e 100%);
}

body.no-webgl[data-shader-theme="earth"] {
    background: linear-gradient(135deg, #0a0805 0%, #1a150d 50%, #2a251a 100%);
}

body.no-webgl[data-shader-theme="light"] {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 50%, #3a3a3a 100%);
}

body.no-webgl[data-shader-theme="dark"] {
    background: linear-gradient(135deg, #000000 0%, #0a0a0a 50%, #141414 100%);
}