/* ============================================================================
   CODEVAULT - OPTIMIZED VS CODE STYLE
   Performance Optimized + Material Icons
   ============================================================================ */

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

:root {
    --color-primary: #f0eee6;
    --color-dark: #141413;
    --color-accent: #e3dacc;
    --color-accent-dark: #d4cbb9;
    --bg-sidebar: #1a1a19;
    --bg-editor: #292929;
    --text-primary: #e8e8e8;
    --text-secondary: #a6a6a6;
    --border-color: #3a3935;
    --transition: all 0.15s ease;
}

/* Material Icons Custom Colors */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
    user-select: none;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-dark);
    color: var(--text-primary);
    overflow: hidden;
}

/* Performance: Use GPU acceleration for animations */
.app-container, .sidebar, .content-area {
    will-change: transform;
    transform: translateZ(0);
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--color-dark);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    height: 48px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
}

/* Logo styling */
.app-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 4px;
    transition: var(--transition);
}

.app-logo:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.header-title .material-symbols-outlined {
    color: var(--color-accent);
    font-size: 20px;
}

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

.sidebar {
    width: 280px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease;
    overflow: hidden;
    flex-shrink: 0;
}

.sidebar.collapsed {
    width: 0;
    border-right: none;
}

.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

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

.btn-toggle-sidebar,
.btn-icon,
.btn-icon-small,
.btn-action {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-toggle-sidebar:hover,
.btn-icon:hover,
.btn-icon-small:hover,
.btn-action:hover {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.08);
}

.btn-icon-small {
    padding: 4px;
}

.btn-icon-small .material-symbols-outlined,
.btn-action .material-symbols-outlined {
    font-size: 18px;
}

.btn-select-dir {
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0;
    background: var(--color-accent);
    color: var(--color-dark);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
}

.btn-select-dir:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
}

.btn-select-dir .material-symbols-outlined {
    font-size: 18px;
}

.btn-primary,
.btn-secondary {
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* ============================================================================
   SIDEBAR
   ============================================================================ */

.sidebar-header {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.sidebar-header h3 {
    font-size: 11px;
    letter-spacing: 1.2px;
    color: var(--text-secondary);
    font-weight: 600;
}

.sidebar-actions {
    display: flex;
    gap: 2px;
}

.search-box {
    position: relative;
    padding: 8px 12px;
    flex-shrink: 0;
}

.search-box .material-symbols-outlined {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 18px;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 6px 8px 6px 32px;
    background: var(--bg-editor);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 12px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.sidebar-select {
    padding: 0 12px;
    flex-shrink: 0;
}

/* File Tree - Optimized for Performance */
.file-tree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 0;
    /* Use passive event listeners for better scroll performance */
    overscroll-behavior: contain;
}

.file-tree::-webkit-scrollbar {
    width: 8px;
}

.file-tree::-webkit-scrollbar-track {
    background: transparent;
}

.file-tree::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary);
}

.empty-state .material-symbols-outlined {
    font-size: 64px;
    opacity: 0.3;
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 14px;
    margin-bottom: 4px;
}

.empty-state small {
    font-size: 11px;
    opacity: 0.7;
}

/* ============================================================================
   FILE TREE ITEMS - OPTIMIZED
   ============================================================================ */

.tree-item {
    user-select: none;
    contain: layout style;
}

.tree-item-content {
    display: flex;
    align-items: center;
    padding: 3px 8px;
    min-height: 24px;
    cursor: pointer;
    transition: background 0.1s ease;
    gap: 4px;
}

.tree-item-content:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Indentation levels */
.tree-item-content[data-level="0"] { padding-left: 8px; }
.tree-item-content[data-level="1"] { padding-left: 24px; }
.tree-item-content[data-level="2"] { padding-left: 40px; }
.tree-item-content[data-level="3"] { padding-left: 56px; }
.tree-item-content[data-level="4"] { padding-left: 72px; }

.expand-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.15s ease;
}

.expand-btn .material-symbols-outlined {
    font-size: 16px;
}

.expand-btn.expanded .material-symbols-outlined {
    transform: rotate(90deg);
}

.file-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-right: 2px;
}

/* VS Code style SVG icons */
.file-icon .vscode-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
    display: block;
}

/* Folder icon slightly larger */
.folder-icon .vscode-icon {
    width: 19px;
    height: 19px;
    opacity: 0.9;
}

/* Smooth icon loading */
.vscode-icon {
    transition: opacity 0.2s ease;
}

.vscode-icon:hover {
    opacity: 1;
}

/* Fallback for Material Icons (if needed) */
.file-icon .material-symbols-outlined {
    font-size: 16px;
}

.file-label {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    cursor: pointer;
    min-width: 0;
}

.file-checkbox {
    width: 14px;
    height: 14px;
    cursor: pointer;
    accent-color: var(--color-accent);
    flex-shrink: 0;
}

.file-name {
    font-size: 12px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.file-size {
    font-size: 10px;
    color: var(--text-secondary);
    margin-left: auto;
    flex-shrink: 0;
}

.tree-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.tree-children.open {
    max-height: none;
}

.tree-item.ignored {
    opacity: 0.4;
}

.tree-item.ignored .file-checkbox {
    cursor: not-allowed;
}

/* ============================================================================
   TAB BAR
   ============================================================================ */

.tab-bar {
    display: flex;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    flex-shrink: 0;
    height: 35px;
}

.tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 12px;
    background: var(--bg-editor);
    border-right: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

.tab .material-symbols-outlined {
    font-size: 16px;
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-accent);
}

/* ============================================================================
   EDITOR - OPTIMIZED
   ============================================================================ */

.editor-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    flex-wrap: wrap;
    gap: 8px;
}

.editor-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.info-item .material-symbols-outlined {
    font-size: 16px;
    color: var(--color-accent);
}

.separator {
    color: var(--border-color);
}

.editor-actions {
    display: flex;
    gap: 4px;
}

.editor-content {
    flex: 1;
    overflow: hidden;
    position: relative;
    background: var(--bg-editor);
}

/* Code Editor - Virtual Scrolling Ready */
.code-editor {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: auto;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.5;
    padding: 12px 0;
}

.code-editor::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.code-editor::-webkit-scrollbar-track {
    background: var(--bg-editor);
}

.code-editor::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.editor-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
}

.editor-placeholder .material-symbols-outlined {
    font-size: 64px;
    opacity: 0.3;
    margin-bottom: 12px;
}

.editor-placeholder p {
    font-size: 14px;
    margin-bottom: 4px;
}

.editor-placeholder small {
    font-size: 11px;
    opacity: 0.7;
}

/* Syntax Highlighting */
.keyword { color: #c678dd; }
.string { color: #98c379; }
.comment { color: #5c6370; font-style: italic; }
.function { color: #61afef; }
.number { color: #d19a66; }

/* ============================================================================
   STATS PANEL
   ============================================================================ */

.stats-panel {
    background: var(--bg-sidebar);
    border-top: 1px solid var(--border-color);
    padding: 10px 12px;
    display: flex;
    gap: 20px;
    font-size: 11px;
    color: var(--text-secondary);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 600;
}

.stat-label .material-symbols-outlined {
    font-size: 16px;
    color: var(--color-accent);
}

.stat-value {
    color: var(--text-primary);
}

/* ============================================================================
   LOADING OVERLAY
   ============================================================================ */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    z-index: 9999;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(227, 218, 204, 0.2);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay p {
    color: var(--color-primary);
    font-size: 14px;
}

/* ============================================================================
   MODAL
   ============================================================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

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

.modal {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 16px;
    color: var(--color-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

/* ============================================================================
   TOAST NOTIFICATIONS
   ============================================================================ */

.toast-container {
    position: fixed;
    top: 60px;
    right: 20px;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--color-accent);
    padding: 12px 16px;
    border-radius: 4px;
    min-width: 280px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success { border-left-color: #10b981; }
.toast.error { border-left-color: #ef4444; }
.toast.warning { border-left-color: #f59e0b; }
.toast.info { border-left-color: #3b82f6; }

.toast .material-symbols-outlined {
    font-size: 20px;
}

.toast.success .material-symbols-outlined { color: #10b981; }
.toast.error .material-symbols-outlined { color: #ef4444; }
.toast.warning .material-symbols-outlined { color: #f59e0b; }
.toast.info .material-symbols-outlined { color: #3b82f6; }


.btn-generate {
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-dark);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    box-shadow: 0 2px 8px rgba(227, 218, 204, 0.3);
}

.btn-generate:hover {
    background: linear-gradient(135deg, var(--color-accent-dark) 0%, #cfc3b0 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(227, 218, 204, 0.4);
}

.btn-generate:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(227, 218, 204, 0.3);
}

.btn-generate .material-symbols-outlined {
    font-size: 18px;
}

/* Update Select Directory button to match */
.btn-select-dir {
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0;
    background: var(--color-accent);
    color: var(--color-dark);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    box-shadow: 0 2px 8px rgba(227, 218, 204, 0.3);
}

.btn-select-dir:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(227, 218, 204, 0.4);
}

.btn-select-dir:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(227, 218, 204, 0.3);
}

/* Clear button in sidebar header */
.btn-icon-small .material-symbols-outlined {
    font-size: 18px;
}

/* Adjust sidebar select spacing */
.sidebar-select {
    padding: 0 12px;
    flex-shrink: 0;
}
/* ============================================================================
   RESPONSIVE
   ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 100;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
    }
    
    .editor-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .editor-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .stats-panel {
        flex-direction: column;
        gap: 8px;
    }
}

/* ============================================================================
   CUSTOM MODAL
   ============================================================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease;
}

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

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

.modal-dialog {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 90%;
    max-width: 480px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header .material-symbols-outlined {
    color: var(--color-accent);
    font-size: 24px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-body {
    padding: 24px;
}

.modal-body p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 14px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

.btn-modal {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-modal.btn-cancel {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-modal.btn-cancel:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-modal.btn-confirm {
    background: var(--color-accent);
    color: var(--color-dark);
    border: 1px solid var(--color-accent);
}

.btn-modal.btn-confirm:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(227, 218, 204, 0.3);
}

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

/* Mobile responsive */
@media (max-width: 480px) {
    .modal-dialog {
        width: 95%;
        margin: 0 16px;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 16px;
    }

    .btn-modal {
        flex: 1;
    }
}