@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Fira+Code:wght@400;500;600&display=swap');  

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

body {  
    display: flex;  
    justify-content: center;  
    align-items: center;  
    min-height: 100vh;  
    background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);  
    font-family: 'Orbitron', sans-serif;  
    overflow: hidden;  
}  

#canvas-container {  
    position: relative;  
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.8),  
                0 0 100px rgba(100, 150, 255, 0.3);  
    border-radius: 10px;  
    overflow: visible;  
}  

/* 🆕 LaTeX Tech Panel Style */  
#tech-panel {  
    position: absolute;  
    top: 30px;  
    right: 30px;  
    width: 520px;  
    max-height: 720px;  
    background: rgba(10, 15, 25, 0.95);  
    border-radius: 12px;  
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);  
    backdrop-filter: blur(10px);  
    opacity: 0;  
    pointer-events: none;  
    transition: opacity 0.3s ease;  
    overflow: hidden;  
    z-index: 1000;  
    border: 1px solid rgba(100, 150, 200, 0.3);  
}  

#tech-panel.visible {  
    opacity: 1;  
    pointer-events: auto;  
}  

.panel-header {  
    background: linear-gradient(135deg, #3c5a7d 0%, #2a3f5f 100%);  
    padding: 16px 20px;  
    border-radius: 12px 12px 0 0;  
    display: flex;  
    justify-content: space-between;  
    align-items: center;  
    cursor: move;  
}  

.panel-title {  
    color: #ffffff;  
    font-size: 16px;  
    font-weight: bold;  
    letter-spacing: 0.5px;  
}  

.panel-close {  
    color: #c8d8e8;  
    font-size: 12px;  
    opacity: 0.8;  
}  

.panel-content {  
    padding: 20px;  
    max-height: 650px;  
    overflow-y: auto;  
}  

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

.panel-content::-webkit-scrollbar-track {  
    background: rgba(30, 40, 60, 0.3);  
    border-radius: 4px;  
}  

.panel-content::-webkit-scrollbar-thumb {  
    background: rgba(100, 150, 200, 0.5);  
    border-radius: 4px;  
}  

.panel-content::-webkit-scrollbar-thumb:hover {  
    background: rgba(100, 150, 200, 0.7);  
}  

.scene-title {  
    color: #64c8ff;  
    font-size: 14px;  
    font-weight: bold;  
    margin-bottom: 15px;  
    padding-bottom: 10px;  
    border-bottom: 1px solid rgba(100, 150, 200, 0.3);  
}  

.section-title {  
    color: #ffc864;  
    font-size: 12px;  
    font-weight: bold;  
    margin: 20px 0 12px 0;  
    display: flex;  
    align-items: center;  
    gap: 8px;  
}  

.formula-item {  
    background: rgba(5, 10, 20, 0.6);  
    padding: 14px 16px;  
    margin: 10px 0;  
    border-radius: 8px;  
    border-left: 3px solid rgba(100, 200, 255, 0.5);  
}  

.formula-label {  
    color: #ffdc64;  
    font-size: 11px;  
    font-weight: bold;  
    margin-bottom: 10px;  
    font-family: 'Orbitron', sans-serif;  
}  

.formula-content {  
    color: #e0f0ff;  
    font-size: 15px;  
    line-height: 2;  
    overflow-x: auto;  
    padding: 8px 0;  
}  

.formula-content .katex {  
    font-size: 1.15em;  
    color: #e0f0ff;  
}  

.formula-content .katex-display {  
    margin: 0.5em 0;  
}  

.code-block {  
    background: rgba(5, 10, 20, 0.8);  
    padding: 16px;  
    border-radius: 8px;  
    margin-top: 12px;  
    overflow-x: auto;  
    border: 1px solid rgba(100, 150, 200, 0.2);  
}  

.code-block pre {  
    margin: 0;  
    color: #c8ffdc;  
    font-family: 'Fira Code', monospace;  
    font-size: 10px;  
    line-height: 1.6;  
}  

.code-keyword {  
    color: #ffb464;  
}  

.code-comment {  
    color: #78a878;  
    font-style: italic;  
}  

.code-method {  
    color: #96c8ff;  
}