:root {
    --math-red: #ff3e3e;
    --math-orange: #ff851b;
    --math-bg: #0a0505;
    --math-card: #150a0a;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --pattern-gold: #ffcc00;
    --geometry-blue: #00e5ff;
}

body {
    background-color: var(--math-bg);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0 10%;
    padding-bottom: 100px;
    background-image: 
        linear-gradient(rgba(255, 62, 62, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 62, 62, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 4rem;
    font-weight: 800;
    margin-top: 60px;
    letter-spacing: -2px;
    text-align: center;
    background: linear-gradient(135deg, #fff 0%, #ff3e3e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    margin-top: 80px;
    border-bottom: 1px solid #331111;
    padding-bottom: 15px;
}

p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 1.5rem auto;
    color: #ccc;
}

.home-nav {
    padding: 2rem 0;
}

.home-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: color 0.3s;
}

.home-nav a:hover {
    color: #fff;
}

.hero-canvas-container {
    width: 100%;
    height: 300px;
    margin: 40px 0;
    background: #000;
    border: 1px solid #221111;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 0 40px rgba(255, 62, 62, 0.1);
}

.toc {
    background: var(--math-card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #331111;
    max-width: 600px;
    margin: 4rem auto;
}

.toc-title {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

.toc-part {
    font-weight: bold;
    color: var(--math-red);
    margin-top: 1.5rem;
}

.toc ol {
    list-style: none;
    padding-left: 0;
}

.toc li {
    margin: 0.8rem 0;
}

.toc a {
    color: #fff;
    text-decoration: none;
    transition: opacity 0.3s;
}

.toc a:hover {
    opacity: 0.7;
}

.interactive-container {
    background: #0d0606;
    border: 1px solid #331111;
    border-radius: 12px;
    margin: 3rem 0;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.controls {
    display: flex;
    width: 100%;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.slider-group label {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

button {
    background: transparent;
    border: 1px solid #442222;
    color: #fff;
    padding: 10px 20px;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    transition: all 0.3s;
}

button:hover {
    border-color: var(--math-red);
    background: rgba(255, 62, 62, 0.1);
}

.section-tag {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 1px;
}

.tag-patterns { background: rgba(255, 204, 0, 0.1); color: var(--pattern-gold); }
.tag-geometry { background: rgba(0, 229, 255, 0.1); color: var(--geometry-blue); }
.tag-chaos { background: rgba(255, 62, 62, 0.1); color: var(--math-red); }

footer {
    margin-top: 100px;
    border-top: 1px solid #221111;
    padding-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
}