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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg: #0f172a;
    --bg-light: #1e293b;
    --bg-lighter: #334155;
    --text: #f1f5f9;
    --text-dim: #94a3b8;
    --border: #334155;
    --success: #10b981;
    --danger: #ef4444;
}

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

.container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

.main-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    align-items: start;
}

/* Canvas */
.canvas-container {
    position: relative;
    background: var(--bg-light);
    border-radius: 1rem;
    overflow: hidden;
    aspect-ratio: 16/10;
    border: 1px solid var(--border);
}

#canvas3d {
    width: 100%;
    height: 100%;
    display: block;
}
.canvas-toolbar {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    gap: 12px;
    align-items: center;
    pointer-events: none;
}
.btn-edit-toggle {
    pointer-events: all;
    background: rgba(15, 23, 42, 0.85);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
}
.btn-edit-toggle.active {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.15);
    color: #fff;
}
.edit-hint {
    pointer-events: none;
    color: var(--text-dim);
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 12px;
}

.loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    z-index: 10;
}

.loading.hidden {
    display: none;
}

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

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

.loading p {
    margin-top: 1rem;
    color: var(--text-dim);
}

/* Panneau de contrôle */
.controls-panel {
    background: var(--bg-light);
    border-radius: 1rem;
    border: 1px solid var(--border);
    padding: 1.5rem;
    max-height: calc(100vh - 12rem);
    overflow-y: auto;
}

.controls-panel::-webkit-scrollbar {
    width: 8px;
}

.controls-panel::-webkit-scrollbar-track {
    background: var(--bg-lighter);
    border-radius: 4px;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

.control-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.control-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.control-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text);
}

/* Mesh selector */
.mesh-selector {
    margin-bottom: 1rem;
}

.mesh-selector label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
}

.mesh-selector select {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-lighter);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.mesh-selector select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Mesh visibility toggle */
.mesh-visibility {
    margin-bottom: 1rem;
}

.mesh-visibility > label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
}

.mesh-list {
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem;
}

.mesh-list::-webkit-scrollbar {
    width: 6px;
}

.mesh-list::-webkit-scrollbar-track {
    background: var(--bg-lighter);
    border-radius: 3px;
}

.mesh-list::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

.mesh-item {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.5rem;
    border-radius: 0.25rem;
    transition: background 0.2s;
}

.mesh-item:hover {
    background: var(--bg-lighter);
}

.mesh-item label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    flex: 1;
    color: var(--text);
    font-size: 0.85rem;
}

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

/* Upload area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-area.drag-over {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-area svg {
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.upload-area p {
    color: var(--text);
    margin-bottom: 0.5rem;
}

.upload-area span {
    color: var(--text-dim);
    font-size: 0.9rem;
    display: block;
    margin-bottom: 1rem;
}

.btn-upload {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.2s;
}

.btn-upload:hover {
    background: var(--primary-dark);
}

.image-preview {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 2px solid var(--border);
}

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

.btn-remove {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--danger);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.btn-remove:hover {
    transform: scale(1.1);
}

/* Sliders */
.slider-group {
    margin-bottom: 1.5rem;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
}

.slider-group .value {
    color: var(--primary);
    font-weight: 600;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-lighter);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: transform 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
    transition: transform 0.2s;
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
}

/* Checkbox group */
.checkbox-group {
    margin-bottom: 1rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* Buttons */
.btn-reset {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-lighter);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-reset:hover {
    background: var(--border);
}

.btn-export {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-export:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

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

/* Quality select */
.quality-select {
    margin-bottom: 1rem;
}

.quality-select label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
}

.quality-select select {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-lighter);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.quality-select select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Image Editor Modal */
.image-editor-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.image-editor-modal.active {
    display: flex;
}

.editor-content {
    background: var(--bg-light);
    border-radius: 1rem;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 1200px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

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

.editor-header h2 {
    font-size: 1.5rem;
    margin: 0;
}

.btn-close-editor {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--danger);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.btn-close-editor:hover {
    transform: scale(1.1);
}

.editor-main {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 1.5rem;
    padding: 1.5rem;
    flex: 1;
    overflow: hidden;
}

.canvas-wrapper {
    background: var(--bg);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

#editorCanvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
    image-rendering: crisp-edges;
}

.editor-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
}

.editor-control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.editor-control-group label {
    display: flex;
    justify-content: space-between;
    color: var(--text);
    font-size: 0.9rem;
}

.editor-control-group .value {
    color: var(--primary);
    font-weight: 600;
}

.btn-reset-editor {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-lighter);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-reset-editor:hover {
    background: var(--border);
}

.editor-footer {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border);
}

.btn-cancel {
    flex: 1;
    padding: 1rem;
    background: var(--bg-lighter);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-cancel:hover {
    background: var(--border);
}

.btn-apply {
    flex: 2;
    padding: 1rem;
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-apply:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

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

/* Responsive */
@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .controls-panel {
        max-height: none;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }
}