/* =====================================
   360° VIEWER STYLES - RESPONSIVE & MODERN
   ===================================== */

:root {
    --viewer-bg: #1a1a1a;
    --viewer-control: #ffffff;
    --viewer-control-hover: #bb0a30;
    --viewer-progress: #bb0a30;
    --viewer-shadow: rgba(0, 0, 0, 0.3);
    --viewer-radius: 15px;
}

/* Main 360° Viewer Container */
.viewer-360-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    background: var(--viewer-bg);
    border-radius: var(--viewer-radius);
    overflow: hidden;
    box-shadow: 0 20px 60px var(--viewer-shadow);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 360° Viewer Canvas/Image Area */
.viewer-360-canvas {
    position: relative;
    width: 100%;
    height: 500px;
    background: var(--viewer-bg);
    cursor: grab;
    overflow: hidden;
    border-radius: var(--viewer-radius) var(--viewer-radius) 0 0;
}

.viewer-360-canvas:active {
    cursor: grabbing;
}

.viewer-360-canvas.dragging {
    cursor: grabbing;
}

/* Main 360° Image */
.viewer-360-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: opacity 0.2s ease;
    pointer-events: none;
    user-select: none;
}

/* Loading State */
.viewer-360-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--viewer-control);
    font-size: 1.2rem;
    z-index: 10;
}

.viewer-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid var(--viewer-progress);
    border-radius: 50%;
    animation: viewer-spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes viewer-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Controls Container */
.viewer-360-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(26, 26, 26, 0.95), transparent);
    padding: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    z-index: 20;
}

/* Control Buttons */
.viewer-control-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--viewer-control);
    padding: 0.75rem;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    font-size: 1.1rem;
}

.viewer-control-btn:hover {
    background: var(--viewer-control-hover);
    border-color: var(--viewer-control-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(187, 10, 48, 0.3);
}

.viewer-control-btn:active {
    transform: translateY(0);
}

.viewer-control-btn.active {
    background: var(--viewer-control-hover);
    border-color: var(--viewer-control-hover);
    color: white;
}

/* Progress Bar */
.viewer-progress-container {
    flex: 1;
    max-width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
    margin: 0 1rem;
}

.viewer-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--viewer-progress), #ff1744);
    border-radius: 2px;
    transition: width 0.2s ease;
    position: relative;
}

.viewer-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 10px;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 0 2px 2px 0;
}

/* Rotation Indicator */
.viewer-rotation-indicator {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: var(--viewer-control);
    padding: 0.5rem 1rem;
    border-radius: var(--viewer-radius);
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    z-index: 15;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.viewer-360-container:hover .viewer-rotation-indicator {
    opacity: 1;
}

/* Touch/Drag Instructions */
.viewer-instructions {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: var(--viewer-control);
    padding: 1.5rem 2rem;
    border-radius: var(--viewer-radius);
    text-align: center;
    z-index: 25;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.viewer-instructions.show {
    opacity: 1;
}

.viewer-instructions h4 {
    color: var(--viewer-progress);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.viewer-instructions p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Fullscreen Mode */
.viewer-360-fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    z-index: 10000 !important;
    border-radius: 0 !important;
}

.viewer-360-fullscreen .viewer-360-canvas {
    height: 100vh;
    border-radius: 0;
}

/* Fullscreen Close Button */
.viewer-fullscreen-close {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(0, 0, 0, 0.8);
    color: var(--viewer-control);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.75rem;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 30;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.viewer-fullscreen-close:hover {
    background: var(--viewer-control-hover);
    border-color: var(--viewer-control-hover);
    color: white;
}

/* Image Counter */
.viewer-image-counter {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: var(--viewer-control);
    padding: 0.5rem 1rem;
    border-radius: var(--viewer-radius);
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 15;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Thumbnail Strip (Optional) */
.viewer-thumbnails {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(26, 26, 26, 0.95);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.viewer-thumbnails::-webkit-scrollbar {
    display: none;
}

.viewer-thumbnail {
    width: 60px;
    height: 40px;
    border-radius: 6px;
    cursor: pointer;
    opacity: 0.5;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    object-fit: cover;
}

.viewer-thumbnail:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.viewer-thumbnail.active {
    opacity: 1;
    border-color: var(--viewer-progress);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(187, 10, 48, 0.3);
}

/* Auto-rotation Animation */
.viewer-360-canvas.auto-rotating {
    animation: viewer-auto-rotate 10s linear infinite;
}

@keyframes viewer-auto-rotate {
    0% { background-position: 0% center; }
    100% { background-position: 100% center; }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .viewer-360-canvas {
        height: 350px;
    }
    
    .viewer-360-controls {
        padding: 1rem;
        gap: 0.75rem;
    }
    
    .viewer-control-btn {
        width: 44px;
        height: 44px;
        font-size: 1rem;
    }
    
    .viewer-progress-container {
        max-width: 120px;
        margin: 0 0.5rem;
    }
    
    .viewer-instructions {
        padding: 1rem 1.5rem;
        max-width: 90%;
    }
    
    .viewer-instructions h4 {
        font-size: 1rem;
    }
    
    .viewer-instructions p {
        font-size: 0.85rem;
    }
    
    .viewer-rotation-indicator,
    .viewer-image-counter {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .viewer-thumbnails {
        padding: 0.75rem;
    }
    
    .viewer-thumbnail {
        width: 50px;
        height: 35px;
    }
}

@media (max-width: 480px) {
    .viewer-360-canvas {
        height: 280px;
    }
    
    .viewer-360-controls {
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    .viewer-control-btn {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
    
    .viewer-progress-container {
        max-width: 100px;
        margin: 0 0.25rem;
    }
    
    .viewer-instructions {
        padding: 0.75rem 1rem;
    }
    
    .viewer-thumbnail {
        width: 45px;
        height: 30px;
    }
}

/* High DPI Display Support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .viewer-360-image {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .viewer-360-container {
        background: #0a0a0a;
    }
    
    .viewer-360-canvas {
        background: #0a0a0a;
    }
}

/* Accessibility Improvements */
.viewer-control-btn:focus {
    outline: 2px solid var(--viewer-progress);
    outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .viewer-360-image,
    .viewer-control-btn,
    .viewer-progress-bar,
    .viewer-thumbnail {
        transition: none !important;
    }
    
    .viewer-360-canvas.auto-rotating {
        animation: none !important;
    }
    
    .viewer-loading-spinner {
        animation: none !important;
    }
}

/* Print Styles */
@media print {
    .viewer-360-controls,
    .viewer-rotation-indicator,
    .viewer-image-counter,
    .viewer-instructions {
        display: none !important;
    }
    
    .viewer-360-container {
        box-shadow: none !important;
        border: 1px solid #ddd;
    }
}

/* Loading States */
.viewer-360-container.loading .viewer-360-image {
    opacity: 0.5;
}

.viewer-360-container.loading .viewer-360-controls {
    pointer-events: none;
    opacity: 0.7;
}

/* Error State */
.viewer-360-error {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--viewer-control);
    z-index: 30;
}

.viewer-360-error i {
    font-size: 3rem;
    color: #ff6b6b;
    margin-bottom: 1rem;
}

.viewer-360-error h4 {
    color: var(--viewer-control);
    margin-bottom: 0.5rem;
}

.viewer-360-error p {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Performance Optimizations */
.viewer-360-canvas,
.viewer-360-image,
.viewer-control-btn,
.viewer-progress-bar {
    will-change: transform, opacity;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

/* Hover Effects */
.viewer-360-container:hover .viewer-360-controls {
    opacity: 1;
}

.viewer-360-controls {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

/* Quality Indicator */
.viewer-quality-indicator {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: var(--viewer-control);
    padding: 0.25rem 0.75rem;
    border-radius: var(--viewer-radius);
    font-size: 0.75rem;
    z-index: 15;
    backdrop-filter: blur(10px);
    opacity: 0.7;
}