/* ============================================
   WebAR Exhibition - AR Viewer Styles
   Mobile-First, High-Contrast UI
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #22d3ee;
    --background-dark: #0f0f1a;
    --background-card: #1a1a2e;
    --background-overlay: rgba(15, 15, 26, 0.95);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
        Cantarell, sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    touch-action: manipulation;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* ============================================
   Loading Screen
   ============================================ */
.loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-dark);
    z-index: 1000;
    transition: opacity var(--transition-normal);
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.loading-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin: 0 auto 0.5rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(
        90deg,
        var(--primary-color),
        var(--secondary-color)
    );
    border-radius: 2px;
    transition: width var(--transition-fast);
}

.loading-percent {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Error Screen
   ============================================ */
.error-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-dark);
    z-index: 1000;
}

.error-content {
    text-align: center;
    padding: 2rem;
    max-width: 320px;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.error-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.error-message {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover,
.btn-icon:focus {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.btn-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* ============================================
   Main Container
   ============================================ */
.main-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--background-dark);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem;
    background: linear-gradient(
        to bottom,
        var(--background-overlay),
        transparent
    );
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    max-width: 600px;
    margin: 0 auto;
}

.product-name {
    flex: 1;
    min-width: 0;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-shadow: 0 2px 4px var(--shadow-color);
}

.header-home-btn {
    text-decoration: none;
    flex-shrink: 0;
}

.header-content .btn-icon {
    flex-shrink: 0;
}

/* ============================================
   Viewer Container
   ============================================ */
.viewer-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

model-viewer {
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0f0f1a 100%);
    --poster-color: transparent;
}

model-viewer::part(default-ar-button) {
    display: none;
}

/* AR Button */
.ar-button {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.75rem;
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--secondary-color)
    );
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-normal);
    z-index: 50;
}

.ar-button:hover,
.ar-button:focus {
    transform: translateX(-50%) scale(1.05);
    box-shadow: 0 6px 30px rgba(99, 102, 241, 0.5);
}

.ar-button:active {
    transform: translateX(-50%) scale(0.98);
}

.ar-button svg {
    flex-shrink: 0;
}

/* AR Not Supported */
.ar-not-supported {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.25rem;
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Model Loading Progress */
.model-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color);
}

.model-progress-bar {
    height: 100%;
    background: linear-gradient(
        90deg,
        var(--primary-color),
        var(--secondary-color)
    );
    transition: width var(--transition-fast);
}

/* Poster Container */
.poster-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-dark);
}

.poster-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ============================================
   Controls Bar
   ============================================ */
.controls-bar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--background-overlay);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 50;
}

.control-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.625rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover,
.control-btn:focus {
    background: var(--border-color);
    color: var(--text-primary);
}

.control-btn.active {
    color: var(--primary-color);
}

.control-btn svg {
    flex-shrink: 0;
}

/* ============================================
   Info Panel
   ============================================ */
.info-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 60vh;
    background: var(--background-overlay);
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    z-index: 200;
    overflow: hidden;
}

.info-panel.visible {
    transform: translateY(0);
}

.info-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.info-panel-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.info-panel-content {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(60vh - 70px);
}

.product-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.product-meta {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.meta-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--background-card);
    border-radius: var(--border-radius);
}

.meta-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.meta-value {
    font-weight: 500;
}

/* ============================================
   Hints Overlay
   ============================================ */
.hints-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    background: var(--background-overlay);
    z-index: 150;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.hint-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.hint-icon {
    font-size: 1.5rem;
}

.btn-dismiss {
    margin-top: 1rem;
    padding: 0.875rem 2rem;
    background: var(--primary-color);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-dismiss:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

/* ============================================
   Media Queries - Tablet & Desktop
   ============================================ */
@media (min-width: 768px) {
    .product-name {
        font-size: 1.5rem;
    }

    .ar-button {
        bottom: 120px;
        padding: 1.125rem 2rem;
        font-size: 1.125rem;
    }

    .controls-bar {
        gap: 1rem;
        padding: 0.75rem;
    }

    .control-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.75rem;
    }

    .info-panel {
        left: 50%;
        right: auto;
        bottom: 50%;
        transform: translate(-50%, 50%);
        width: 90%;
        max-width: 500px;
        max-height: 70vh;
        border-radius: var(--border-radius-lg);
    }

    .info-panel.visible {
        transform: translate(-50%, 50%);
    }
}

/* ============================================
   Landscape Mode Adjustments
   ============================================ */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: 0.75rem;
    }

    .product-name {
        font-size: 1rem;
    }

    .ar-button {
        bottom: 70px;
        padding: 0.75rem 1.25rem;
        font-size: 0.875rem;
    }

    .controls-bar {
        bottom: 10px;
        padding: 0.375rem;
    }

    .control-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.5rem;
    }

    .control-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* ============================================
   Safe Area Insets (Notch Support)
   ============================================ */
@supports (padding: max(0px)) {
    .header {
        padding-top: max(1rem, env(safe-area-inset-top));
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }

    .controls-bar {
        bottom: max(20px, env(safe-area-inset-bottom));
    }

    .info-panel-content {
        padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   High Contrast Mode
   ============================================ */
@media (prefers-contrast: high) {
    :root {
        --background-dark: #000000;
        --background-card: #1a1a1a;
        --border-color: rgba(255, 255, 255, 0.3);
    }

    .btn-primary,
    .ar-button,
    .btn-dismiss {
        border: 2px solid var(--text-primary);
    }
}

/* ============================================
   Products Sidebar
   ============================================ */
.products-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 90vw;
    height: 100vh;
    background: var(--background-overlay);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border-color);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 250;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.products-sidebar.visible {
    transform: translateX(0);
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.sidebar-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.product-card-mini {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.product-card-mini:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
    transform: translateX(-4px);
}

.product-thumbnail {
    width: 70px;
    height: 70px;
    flex-shrink: 0;
    background: linear-gradient(135deg, #1e1e3f, #2a2a4a);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-thumbnail svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.product-info-mini {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    justify-content: center;
}

.product-info-mini h4 {
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
    font-size: 0.625rem;
    font-weight: 500;
    border-radius: 4px;
    align-self: flex-start;
}

.no-products {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Sidebar Toggle Button */
.sidebar-toggle-btn {
    position: fixed;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.75rem 0.625rem;
    background: var(--background-overlay);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.sidebar-toggle-btn:hover,
.sidebar-toggle-btn:focus {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.sidebar-toggle-btn svg {
    flex-shrink: 0;
}

.sidebar-toggle-btn.active {
    color: var(--primary-color);
}

/* ============================================
   Responsive Sidebar
   ============================================ */
@media (max-width: 768px) {
    .products-sidebar {
        width: 100%;
        max-width: 100vw;
    }

    .sidebar-toggle-btn {
        right: 0.75rem;
        padding: 0.625rem 0.5rem;
    }
    .header {
        padding: 0.75rem 0.85rem;
    }
    .header-content {
        gap: 0.6rem;
    }
    .product-name {
        font-size: 1.05rem;
        max-width: none;
    }
    .controls-bar {
        gap: 0.4rem;
        padding: 0.4rem;
        max-width: calc(100vw - 1rem);
        overflow-x: auto;
        scrollbar-width: none;
    }
    .controls-bar::-webkit-scrollbar { display: none; }
    .control-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.55rem;
        flex-shrink: 0;
    }
    .ar-button {
        bottom: 85px;
        padding: 0.85rem 1.3rem;
        font-size: 0.9rem;
    }
    .hints-overlay {
        padding: 1rem;
    }
    .hint-item {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
}
@media (max-width: 480px) {
    .header {
        padding: 0.6rem 0.75rem;
        padding-top: max(0.6rem, env(safe-area-inset-top));
    }
    .product-name {
        font-size: 0.95rem;
    }
    .btn-icon {
        width: 38px;
        height: 38px;
    }
    .controls-bar {
        bottom: max(12px, env(safe-area-inset-bottom));
        gap: 0.3rem;
        padding: 0.35rem;
    }
    .control-btn {
        padding: 0.45rem 0.6rem;
        gap: 0.2rem;
    }
    .control-btn svg {
        width: 18px;
        height: 18px;
    }
    .ar-button {
        bottom: 78px;
        padding: 0.75rem 1.1rem;
        font-size: 0.85rem;
        gap: 0.5rem;
    }
    .info-panel {
        max-height: 65vh;
        border-radius: 16px 16px 0 0;
    }
    .info-panel-content {
        padding: 1rem;
        max-height: calc(65vh - 60px);
    }
    .products-sidebar {
        width: 100%;
    }
    .sidebar-toggle-btn {
        right: 0.5rem;
        padding: 0.5rem 0.4rem;
        font-size: 0.55rem;
    }
    .product-card-mini {
        padding: 0.75rem;
        gap: 0.75rem;
    }
    .product-thumbnail {
        width: 60px;
        height: 60px;
    }
}
@media (max-width: 360px) {
    .controls-bar {
        gap: 0.2rem;
    }
    .control-btn {
        padding: 0.4rem 0.45rem;
        font-size: 0.5rem;
    }
}

@media (max-height: 500px) and (orientation: landscape) {
    .sidebar-toggle-btn {
        top: auto;
        bottom: 80px;
        transform: translateY(0);
    }
}