/* =============================================
   LAYOUT STYLES - Math Platform
   © Situ Ghosh - All Rights Reserved
   ============================================= */

/* Page Layouts */
.page-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* Page Header */
.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.8rem;
    color: var(--secondary-color);
}

.page-header h1 i {
    color: var(--primary-color);
}

.page-header p {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Tool Container */
.tool-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.tool-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 25px;
    background: var(--secondary-color);
    color: var(--text-light);
    flex-wrap: wrap;
    gap: 15px;
}

.tool-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 600;
}

.tool-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tool-body {
    padding: 25px;
}

/* Split Layout */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

@media (max-width: 992px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
}

/* Editor Panel */
.editor-panel {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.editor-header {
    padding: 14px 20px;
    background: var(--secondary-color);
    color: var(--text-light);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.editor-body {
    min-height: 400px;
}

/* Preview Panel */
.preview-panel {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.preview-header {
    padding: 14px 20px;
    background: var(--primary-color);
    color: var(--text-light);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.preview-body {
    min-height: 400px;
    padding: 20px;
    background: #fff;
}

/* Canvas Container */
.canvas-container {
    width: 100%;
    height: 600px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.canvas-container canvas {
    display: block;
}

/* Toolbar */
.toolbar {
    display: flex;
    gap: 8px;
    padding: 15px;
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.tool-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tool-btn.active {
    background: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

.tool-separator {
    width: 1px;
    height: 44px;
    background: var(--border-color);
    margin: 0 8px;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.color-picker {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 2px;
}

.size-slider {
    width: 100px;
    height: 8px;
    -webkit-appearance: none;
    background: var(--border-color);
    border-radius: 4px;
    outline: none;
}

.size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

/* Resource Cards Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.resource-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 25px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.resource-icon {
    width: 55px;
    height: 55px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.resource-icon i {
    font-size: 1.4rem;
    color: var(--text-light);
}

.resource-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.resource-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.resource-meta {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.resource-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.4;
}

.empty-state h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.empty-state p {
    max-width: 400px;
    margin: 0 auto;
}

/* Chapter List */
.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
}

.chapter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: var(--background-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.chapter-item:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

.chapter-item:hover .chapter-count {
    background: rgba(255,255,255,0.2);
    color: var(--text-light);
}

.chapter-name {
    font-weight: 500;
}

.chapter-count {
    padding: 4px 12px;
    background: var(--card-bg);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Work Items Grid */
.work-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.work-item {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.work-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.work-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.work-item h4 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.work-item span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}