/* Portfolio CAD-Style CSS */

/* CSS Variables */
:root {
    --primary-color: #0070c0; /* SOLIDWORKS blue */
    --secondary-color: #e6e6e6; /* Light gray */
    --accent-color: rgb(0, 112, 192);
    --background-color: #f4f6fa;
    --text-color: #222;
    --subtle-text-color: #6a6a6a;
    --card-background: #fff;
    --border-color: #c6c6c6;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --gradient-primary: linear-gradient(90deg, #e6e6e6 0%, #f4f6fa 100%);
    /* SOLIDWORKS-like panel colors */
    --cad-panel-bg: #f4f6fa;
    --cad-panel-border: #c6c6c6;
    --cad-text: #222;
    --cad-text-muted: #6a6a6a;
    --cad-hover: #e6f0fa;
    --cad-active: #0070c0;
    --cad-viewport-bg: #e6e6e6;
    --cad-tree-indent: 20px;
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', 'Inter', Arial, sans-serif;
    background-color: var(--cad-panel-bg);
    color: var(--cad-text);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--cad-panel-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.loading-content {
    text-align: center;
    color: var(--cad-text);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--cad-panel-border);
    border-top: 3px solid var(--cad-active);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

/* App Layout */
#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    height: 60px;
    background: var(--cad-panel-bg);
    border-bottom: 1px solid var(--cad-panel-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    min-width: 250px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo {
    height: 30px;
    width: auto;
}

.app-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cad-text);
}

.header-center {
    flex: 1;
    text-align: center;
}

.header-center h1 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--cad-text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 250px;
    justify-content: flex-end;
}

/* View Controls */
.view-controls {
    display: flex;
    gap: 0.25rem;
    background: var(--cad-panel-border);
    border-radius: 6px;
    padding: 2px;
}

.view-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.45rem 0.9rem;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--cad-text-muted);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.view-btn:hover {
    background: var(--cad-hover);
    color: var(--primary-color);
}

.view-btn.active {
    background: var(--primary-color);
    color: #fff;
}

.home-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--cad-panel-border);
    border-radius: 6px;
    color: var(--cad-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.home-btn:hover {
    background: var(--cad-hover);
    color: var(--cad-text);
}

/* Main Container */
.main-container {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Feature Tree Panel */
.feature-tree-panel {
    width: 300px;
    background: var(--cad-panel-bg);
    border-right: 1px solid var(--cad-panel-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s ease; /* Add transition for potential collapse */
}

.panel-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--cad-panel-border);
    background: var(--gradient-primary);
    flex-shrink: 0;
}

.panel-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--cad-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-tree {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

/* Tree Items */
.tree-item {
    position: relative;
    padding-left: var(--cad-tree-indent);
}

/* --- SOLIDWORKS-style Tree Lines --- */
.tree-item::before {
    content: '';
    position: absolute;
    left: calc(var(--cad-tree-indent) / 2 - 1px);
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--cad-panel-border);
}

.tree-node::before {
    content: '';
    position: absolute;
    left: calc(var(--cad-tree-indent) / 2 - 1px);
    top: 50%;
    width: calc(var(--cad-tree-indent) / 2 + 1px);
    height: 1px;
    background: var(--cad-panel-border);
}

.feature-tree > .tree-item:first-child::before {
    top: 50%;
}

.feature-tree > .tree-item:last-child::before {
    height: 50%;
}
/* --- End Tree Lines --- */

.tree-node {
    display: flex;
    align-items: center;
    padding: 0.3rem 0.5rem;
    cursor: pointer;
    border-radius: 0;
    font-size: 0.9rem;
    transition: background-color 0.1s ease, color 0.1s ease;
    position: relative;
    margin-left: calc(var(--cad-tree-indent) / 2);
}

.tree-node:hover {
    background: var(--cad-hover);
    color: var(--primary-color);
}

.tree-node.active {
    background: var(--cad-active);
    color: white;
}

.tree-node.active .tree-icon, .tree-node.active .tree-label {
    color: white;
}

.tree-node.selected {
    background: #e6f0fa;
    border-left: 3px solid var(--primary-color);
    color: var(--primary-color);
}

/* Tree Icons */
.tree-icon {
    width: 16px;
    height: 16px;
    margin-right: 0.5rem;
    color: var(--cad-text-muted);
    flex-shrink: 0;
}

/* Simple expand/collapse icon */
.expand-icon {
    width: 12px;
    height: 12px;
    margin-right: 0.5rem;
    flex-shrink: 0;
    position: relative;
    cursor: pointer;
    border: 1px solid var(--cad-text-muted);
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.expand-icon::before,
.expand-icon::after {
    content: '';
    position: absolute;
    background: var(--cad-text-muted);
    transition: transform 0.2s ease;
}

.expand-icon::before {
    width: 8px;
    height: 2px;
}

.expand-icon::after {
    width: 2px;
    height: 8px;
}

.tree-item.collapsed > .tree-node .expand-icon::after {
    transform: scaleY(0);
}

.expand-placeholder {
    width: 12px;
    height: 12px;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.tree-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: 'Segoe UI', Arial, sans-serif;
}

/* Tree Hierarchy */
.tree-children {
    margin-left: 0;
    border-left: none;
    padding-left: 0;
    max-height: 1000px; /* Set a large max-height for transition */
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
}

.tree-item.collapsed > .tree-children {
    max-height: 0;
}

.tree-children .tree-node {
    font-size: 0.85rem;
    padding-left: 0.5rem;
}

/* Viewport */
.viewport {
    flex: 1;
    position: relative;
    background: var(--cad-viewport-bg);
    overflow: hidden;
}

/* 2D Viewport */
.viewport-2d {
    height: 100%;
    overflow-y: auto;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.portfolio-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    scroll-margin-top: 2rem;
}

.portfolio-section h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.portfolio-section h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin: 1.5rem 0 1rem;
    font-weight: 600;
}

.portfolio-section p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.portfolio-section ul {
    list-style: none;
    padding-left: 0;
}

.portfolio-section ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.portfolio-section ul li::before {
    content: '•';
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Experience/Education Entries */
.entry {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
}

.entry h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.entry .subtitle {
    color: var(--subtle-text-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

/* Skills Categories */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.skill-category {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-color);
}

.skill-category h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.skill-category ul li {
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin-bottom: 0.5rem;
    display: inline-block;
    margin-right: 0.5rem;
    font-size: 0.9rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.skill-category ul li::before {
    display: none;
}

/* Contact Links */
.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.social-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.social-link.email:hover {
    border-color: #ea4335;
    color: #ea4335;
}

.social-link.linkedin:hover {
    border-color: #0077b5;
    color: #0077b5;
}

.social-link.github:hover {
    border-color: #333;
    color: #333;
}

.social-link.phone:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 3D Viewport */
.viewport-3d {
    height: 100%;
    position: relative;
}

.viewport-3d canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* 3D Controls Info */
.controls-3d {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 8px;
    color: var(--cad-text);
    font-size: 0.8rem;
    backdrop-filter: blur(10px);
    border: 1px solid var(--cad-panel-border);
}

.controls-3d p {
    margin-bottom: 0.25rem;
}

/* Focus Overlay */
.focus-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.focus-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90%;
    overflow-y: auto;
    position: relative;
    color: var(--text-color);
}

.exit-focus-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
    transition: all 0.2s ease;
}

.exit-focus-btn:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

#focus-content-area {
    padding: 2rem;
}

/* Site Actions - Mobile */
.site-actions-mobile {
    display: none;
}

.site-action-icon-btn {
    background: none;
    border: none;
    color: var(--light-text-color);
    cursor: pointer;
    font-size: 1.2rem;
    margin: 0 5px;
    padding: 5px;
}

.site-action-icon-btn:hover {
    color: var(--accent-color);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .feature-tree-panel {
        width: 250px;
    }
    
    .header-left, .header-right {
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    
    .feature-tree-panel {
        display: none; /* Hide feature tree on mobile */
    }
    
    .app-header {
        flex-wrap: wrap;
        height: auto;
        min-height: 60px;
        padding: 0.5rem;
    }
    
    .header-left, .header-right {
        min-width: auto;
    }
    
    .header-center {
        display: none; /* Hide title on mobile */
    }
    
    .view-controls {
        flex-wrap: wrap;
    }
    
    .viewport-2d {
        padding: 1rem;
    }
    
    .portfolio-section {
        padding: 1.5rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        justify-content: center;
    }

    #site-actions-desktop-btn {
        display: none;
    }

    .site-actions-mobile {
        display: flex;
    }
}

@media (max-width: 480px) {
    .portfolio-section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .portfolio-section h2 {
        font-size: 1.5rem;
    }
    
    .entry {
        padding: 1rem;
    }
    
    .view-btn span {
        display: none;
    }
    
    .home-btn span {
        display: none;
    }
}

/* Scrollbar Styling */
.feature-tree::-webkit-scrollbar,
.viewport-2d::-webkit-scrollbar,
.focus-content::-webkit-scrollbar {
    width: 8px;
}

.feature-tree::-webkit-scrollbar-track,
.viewport-2d::-webkit-scrollbar-track,
.focus-content::-webkit-scrollbar-track {
    background: var(--cad-panel-border);
}

.feature-tree::-webkit-scrollbar-thumb,
.viewport-2d::-webkit-scrollbar-thumb,
.focus-content::-webkit-scrollbar-thumb {
    background: var(--cad-hover);
    border-radius: 4px;
}

.feature-tree::-webkit-scrollbar-thumb:hover,
.viewport-2d::-webkit-scrollbar-thumb:hover,
.focus-content::-webkit-scrollbar-thumb:hover {
    background: var(--cad-active);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

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