/**
 * Professional 3D Viewer Styles - TeamShirtsPrint
 * Version: 2.0 - Production Ready
 * Optimized für Lucide Icons und moderne Browser
 */

/* ============================================================================
   CSS VARIABLES - Design System
   ========================================================================== */

:root {
    /* Colors */
    --color-primary: #1a202c;
    --color-secondary: #4a5568;
    --color-accent: #718096;
    --color-blue: #4299e1;
    --color-blue-dark: #3182ce;
    --color-green: #48bb78;
    --color-red: #fc8181;
    --color-border: #e2e8f0;
    --color-bg: #f7fafc;
    --color-white: #ffffff;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 25px 80px rgba(0, 0, 0, 0.2);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.1) 100%);
    
    /* Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Borders */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

/* ============================================================================
   BASE & RESET
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--color-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   VIEWER SECTION - Main Container
   ========================================================================== */

.viewer-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 700px;
    background: var(--gradient-primary);
    overflow: hidden;
}

.viewer-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.viewer-container canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
    touch-action: none;
    user-select: none;
}

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

/* ============================================================================
   LOADING SCREEN
   ========================================================================== */

.loading-screen {
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    color: var(--color-white);
    animation: fadeInScale 0.6s ease;
}

.loading-spinner {
    width: 64px;
    height: 64px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1.5rem;
}

.loading-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.loading-content p {
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 500;
}

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ============================================================================
   CONTROLS PANEL - Left Sidebar
   ========================================================================== */

.controls-panel {
    position: absolute;
    top: var(--spacing-xl);
    left: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    z-index: 100;
    width: 340px;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
    overflow-x: hidden;
    transition: var(--transition-base);
    animation: slideInLeft 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.controls-panel::-webkit-scrollbar {
    width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
    background: var(--color-bg);
    border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 3px;
    transition: background 0.2s;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

/* Control Sections */
.control-section {
    margin-bottom: var(--spacing-xl);
}

.control-section:last-child {
    margin-bottom: 0;
}

.control-section h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.section-icon {
    width: 20px;
    height: 20px;
    color: var(--color-blue);
}

/* Modern Select */
.modern-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%234a5568' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.75rem;
}

.modern-select:hover {
    border-color: var(--color-blue);
    background-color: var(--color-bg);
}

.modern-select:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 4px rgba(66, 153, 225, 0.1);
}

/* ============================================================================
   UPLOAD AREA
   ========================================================================== */

.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
    background: var(--color-bg);
}

.upload-area:hover {
    border-color: var(--color-blue);
    background: var(--color-white);
    transform: translateY(-2px);
}

.upload-area.drag-over {
    border-color: var(--color-green);
    background: rgba(72, 187, 120, 0.05);
}

.upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--color-blue);
    stroke-width: 1.5;
}

.upload-text {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-primary);
}

.upload-hint {
    font-size: 0.8125rem;
    color: var(--color-accent);
}

/* Preview Container */
.preview-container {
    animation: fadeIn 0.3s ease;
}

.preview-wrapper {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    background: var(--color-bg);
}

.preview-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Position Grid */
.position-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.position-btn {
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--color-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
}

.position-btn i {
    width: 18px;
    height: 18px;
}

.position-btn:hover {
    border-color: var(--color-blue);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.position-btn.active {
    background: var(--color-blue);
    color: var(--color-white);
    border-color: var(--color-blue);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.btn-action {
    padding: 0.875rem;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-action i {
    width: 18px;
    height: 18px;
}

.btn-apply {
    background: var(--color-blue);
    color: var(--color-white);
}

.btn-apply:hover {
    background: var(--color-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.4);
}

.btn-remove {
    background: var(--color-red);
    color: var(--color-white);
}

.btn-remove:hover {
    background: #f56565;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(252, 129, 129, 0.4);
}

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

/* ============================================================================
   COLOR GRID
   ========================================================================== */

.color-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.color-btn {
    aspect-ratio: 1;
    border-radius: var(--border-radius-md);
    border: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    padding: 0;
    overflow: hidden;
}

.color-btn:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: var(--shadow-md);
}

.color-btn:active {
    transform: scale(1.05);
}

.color-btn.active {
    border-color: var(--color-blue);
    box-shadow: 0 0 0 4px rgba(66, 153, 225, 0.15);
}

.color-checkmark {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.color-btn.active .color-checkmark::before {
    content: '✓';
    color: var(--color-white);
    font-weight: 900;
    font-size: 1.25rem;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
    animation: checkPop 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes checkPop {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* ============================================================================
   VIEW BUTTONS
   ========================================================================== */

.view-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.view-btn {
    padding: 0.875rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.view-btn i {
    width: 18px;
    height: 18px;
}

.view-btn:hover {
    border-color: var(--color-blue);
    color: var(--color-primary);
    background: var(--color-bg);
    transform: translateY(-2px);
}

.view-btn.active {
    background: var(--color-blue);
    color: var(--color-white);
    border-color: var(--color-blue);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

/* ============================================================================
   OPTION BUTTONS
   ========================================================================== */

.option-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-btn {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.option-btn i {
    width: 18px;
    height: 18px;
}

.option-btn:hover {
    border-color: var(--color-blue);
    color: var(--color-primary);
    background: var(--color-bg);
    transform: translateX(4px);
}

.option-btn.active {
    background: var(--color-blue);
    color: var(--color-white);
    border-color: var(--color-blue);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

/* ============================================================================
   CAMERA CONTROLS - Floating Right
   ========================================================================== */

.camera-controls {
    position: absolute;
    top: 50%;
    right: var(--spacing-xl);
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 100;
    animation: slideInRight 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translate(40px, -50%);
    }
    to {
        opacity: 1;
        transform: translate(0, -50%);
    }
}

.camera-btn {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
}

.camera-btn i {
    width: 22px;
    height: 22px;
}

.camera-btn:hover {
    background: var(--color-blue);
    color: var(--color-white);
    transform: scale(1.08);
    box-shadow: 0 8px 24px rgba(66, 153, 225, 0.4);
}

.camera-btn:active {
    transform: scale(1.02);
}

/* ============================================================================
   INFO PANEL - Bottom Left
   ========================================================================== */

.info-panel {
    position: absolute;
    bottom: var(--spacing-xl);
    left: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    min-width: 340px;
    animation: slideInUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.info-icon {
    width: 20px;
    height: 20px;
    color: var(--color-blue);
    flex-shrink: 0;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.01em;
}

.info-divider {
    width: 2px;
    height: 40px;
    background: var(--color-border);
    border-radius: 1px;
}

/* ============================================================================
   HELP BUTTON & PANEL - Top Right
   ========================================================================== */

.help-button {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
    z-index: 100;
    animation: slideInRight 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}

.help-button i {
    width: 24px;
    height: 24px;
}

.help-button:hover {
    background: var(--color-blue);
    color: var(--color-white);
    transform: scale(1.08) rotate(5deg);
    box-shadow: 0 8px 24px rgba(66, 153, 225, 0.4);
}

.help-panel {
    position: absolute;
    top: calc(56px + var(--spacing-xl) + var(--spacing-sm));
    right: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    z-index: 101;
    min-width: 320px;
    animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.help-header h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.help-header i {
    width: 20px;
    height: 20px;
    color: var(--color-blue);
}

.help-close {
    width: 32px;
    height: 32px;
    background: var(--color-bg);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
}

.help-close i {
    width: 18px;
    height: 18px;
}

.help-close:hover {
    background: var(--color-red);
    color: var(--color-white);
}

.help-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.help-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.help-item i {
    width: 24px;
    height: 24px;
    color: var(--color-blue);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.help-item strong {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.help-item p {
    font-size: 0.8125rem;
    color: var(--color-secondary);
    line-height: 1.5;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1200px) {
    .controls-panel {
        width: 300px;
    }
    
    .info-panel {
        min-width: 300px;
    }
}

@media (max-width: 1024px) {
    .controls-panel {
        width: 280px;
        padding: var(--spacing-lg);
    }
    
    .camera-controls {
        flex-direction: row;
        top: auto;
        bottom: calc(var(--spacing-xl) + 120px);
        right: var(--spacing-lg);
        transform: none;
    }
    
    .camera-btn {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 1rem;
        --spacing-lg: 0.875rem;
    }
    
    .controls-panel {
        top: var(--spacing-md);
        left: var(--spacing-md);
        right: var(--spacing-md);
        width: auto;
        max-height: 50vh;
        padding: var(--spacing-md);
    }
    
    .camera-controls {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .camera-btn {
        width: 44px;
        height: 44px;
    }
    
    .info-panel {
        bottom: calc(var(--spacing-md) + 60px);
        left: var(--spacing-md);
        right: var(--spacing-md);
        min-width: 0;
        padding: var(--spacing-md);
    }
    
    .help-button {
        top: auto;
        bottom: calc(100vh - 70px);
        right: var(--spacing-md);
        width: 48px;
        height: 48px;
    }
    
    .help-panel {
        top: auto;
        bottom: calc(100vh - 125px);
        right: var(--spacing-md);
        left: var(--spacing-md);
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .controls-panel {
        max-height: 45vh;
    }
    
    .color-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .info-panel {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .info-divider {
        display: none;
    }
}

/* ============================================================================
   UTILITY CLASSES
   ========================================================================== */

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

/* Focus States */
button:focus-visible,
.color-btn:focus-visible,
.view-btn:focus-visible,
.option-btn:focus-visible,
.camera-btn:focus-visible {
    outline: 3px solid var(--color-blue);
    outline-offset: 3px;
}

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

/* Print Styles */
@media print {
    .controls-panel,
    .camera-controls,
    .info-panel,
    .help-button,
    .help-panel {
        display: none !important;
    }
    
    .viewer-section {
        height: auto;
        min-height: 0;
    }
}