:root {
    --primary-color: #4a6cd1;
    --secondary-color: #8a56e8;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --canvas-bg: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--dark-color);
    overflow: hidden;
    height: 100vh;
}

.app-container {
    display: grid;
    grid-template-rows: 60px 1fr 30px;
    height: 100vh;
    width: 100vw;
}

/* Header styles */
header {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: bold;
    font-size: 1.5rem;
}

.logo i {
    margin-right: 10px;
}

.user-controls {
    display: flex;
    align-items: center;
}

.user-controls button {
    margin-left: 10px;
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: 500;
    transition: background-color 0.3s;
}

.user-controls button:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.user-controls button.primary-btn {
    background-color: white;
    color: var(--primary-color);
}

.user-controls button.primary-btn:hover {
    background-color: #f1f5f9;
}

/* Main workspace styles */
.workspace {
    display: grid;
    grid-template-columns: 60px 250px 1fr 250px;
    overflow: hidden;
}

/* Left toolbar */
.toolbar {
    background-color: var(--dark-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 0;
}

.tool {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.tool:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.tool.active {
    background-color: var(--primary-color);
}

/* Layers panel */
.layers-panel {
    background-color: #2a3541;
    color: white;
    padding: 15px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-header i {
    cursor: pointer;
    transition: color 0.2s;
}

.panel-header i:hover {
    color: var(--primary-color);
}

.layers-list {
    flex-grow: 1;
    overflow-y: auto;
}

.layer-item {
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.05);
    margin-bottom: 5px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.layer-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.layer-item.active {
    background-color: rgba(74, 108, 209, 0.2);
    border-left: 3px solid var(--primary-color);
}

.layer-visibility {
    margin-right: 10px;
    cursor: pointer;
}

.timeline {
    margin-top: auto;
    background-color: #232c38;
    padding: 10px;
    height: 180px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.frames-container {
    display: flex;
    overflow-x: auto;
    padding: 5px 0;
    height: 80px;
}

.frame {
    min-width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.1);
    margin-right: 5px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    border: 2px solid transparent;
    overflow: hidden;
    position: relative;
}

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

.frame.active {
    border-color: var(--primary-color);
    background-color: rgba(74, 108, 209, 0.2);
}

.frame:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.frame-number {
    position: absolute;
    bottom: 2px;
    right: 2px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    font-size: 0.7rem;
    padding: 1px 4px;
    border-radius: 2px;
}

.timeline-controls {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
}

.timeline-controls button {
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 4px;
    color: white;
    padding: 5px 10px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.timeline-controls button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

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

/* Canvas area */
.canvas-container {
    background-color: #1e272e;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.canvas-wrapper {
    position: relative;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

#animation-canvas {
    background-color: var(--canvas-bg);
    cursor: crosshair;
}

#onion-skin-canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    opacity: 0.3;
}

.canvas-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

.canvas-controls button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--dark-color);
    color: white;
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: all 0.2s;
}

.canvas-controls button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

/* Properties panel */
.properties-panel {
    background-color: #2a3541;
    color: white;
    padding: 15px;
    overflow-y: auto;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.property-group {
    margin-bottom: 20px;
}

.property-group h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.property-item {
    margin-bottom: 10px;
}

.property-item label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.85rem;
}

.property-item input, 
.property-item select {
    width: 100%;
    padding: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: white;
}

.property-item input[type="range"] {
    -webkit-appearance: none;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

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

.color-picker {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 5px;
}

.color-option {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
}

.color-option.active {
    border-color: white;
    transform: scale(1.1);
}

.custom-color-input {
    margin-top: 10px;
}

/* Footer styles */
footer {
    background-color: var(--dark-color);
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    font-size: 0.8rem;
}

.status {
    display: flex;
    align-items: center;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--success-color);
    margin-right: 8px;
}

/* Modal styles */
.modal-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-container.active {
    display: flex;
}

.modal {
    background-color: #2a3541;
    border-radius: 8px;
    width: 500px;
    max-width: 90%;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: white;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.modal-footer button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
}

.modal-footer button.cancel {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.modal-footer button.cancel:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-footer button.confirm {
    background-color: var(--primary-color);
    color: white;
}

.modal-footer button.confirm:hover {
    background-color: var(--secondary-color);
}

/* Form styling */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: white;
    font-size: 1rem;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    background-color: var(--dark-color);
    color: white;
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1001;
    transform: translateY(-100px);
    opacity: 0;
    transition: all 0.3s;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification.success {
    background-color: var(--success-color);
}

.notification.error {
    background-color: var(--danger-color);
}

.notification.warning {
    background-color: var(--warning-color);
}

/* Responsive settings */
@media (max-width: 1200px) {
    .workspace {
        grid-template-columns: 60px 200px 1fr 200px;
    }
}

@media (max-width: 992px) {
    .workspace {
        grid-template-columns: 60px 180px 1fr 0;
    }
    .properties-panel {
        display: none;
    }
}

@media (max-width: 768px) {
    .workspace {
        grid-template-columns: 60px 0 1fr 0;
    }
    .layers-panel {
        display: none;
    }
}