/* GalaxyJS - Main Styles */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Space+Mono:wght@400;700&display=swap');

/* CSS Variables */
:root {
    --primary-black: #000000;
    --primary-white: #ffffff;
    --cosmic-gray: #1a1a1a;
    --stellar-gray: #2a2a2a;
    --nebula-gray: #3a3a3a;
    --accent-gray: #666666;
    --highlight-gray: #888888;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --border-color: #333333;
    --shadow-dark: rgba(0, 0, 0, 0.8);
    --shadow-light: rgba(255, 255, 255, 0.1);
    --glow-white: rgba(255, 255, 255, 0.3);
    --glow-black: rgba(0, 0, 0, 0.5);
    
    /* Typography */
    --font-primary: 'Orbitron', monospace;
    --font-secondary: 'Space Mono', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-cosmic: 1s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    background: var(--primary-black);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Cosmic Background */
.cosmic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(ellipse at center, var(--cosmic-gray) 0%, var(--primary-black) 100%);
}

.stars-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, var(--text-primary), transparent),
        radial-gradient(2px 2px at 40px 70px, var(--text-secondary), transparent),
        radial-gradient(1px 1px at 90px 40px, var(--text-muted), transparent),
        radial-gradient(1px 1px at 130px 80px, var(--text-muted), transparent),
        radial-gradient(2px 2px at 160px 30px, var(--text-primary), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: twinkle 20s linear infinite;
}

.nebula-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, var(--glow-white) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--glow-white) 0%, transparent 50%);
    opacity: 0.1;
    animation: nebula-drift 30s ease-in-out infinite;
}

.black-hole-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1px;
    height: 1px;
    background: var(--primary-black);
    box-shadow: 0 0 100px 50px var(--primary-black);
    opacity: 0.3;
}

/* Navigation */
.galaxy-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-text {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    font-weight: 900;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.logo-orbit {
    position: relative;
    width: 20px;
    height: 20px;
    border: 1px solid var(--text-primary);
    border-radius: 50%;
    animation: orbit-rotation 4s linear infinite;
}

.logo-planet {
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--text-primary);
    border-radius: 50%;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-6xl);
    font-weight: 900;
    line-height: 1;
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: title-reveal 1s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.3s;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(20px);
    animation: subtitle-reveal 1s ease 0.6s forwards;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    opacity: 0;
    transform: translateY(20px);
    animation: buttons-reveal 1s ease 0.9s forwards;
}

.btn-primary, .btn-secondary {
    padding: var(--space-md) var(--space-xl);
    border: 1px solid var(--text-primary);
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--primary-black);
}

.btn-primary:hover {
    background: transparent;
    color: var(--text-primary);
    box-shadow: 0 0 20px var(--glow-white);
}

.btn-secondary:hover {
    background: var(--text-primary);
    color: var(--primary-black);
    box-shadow: 0 0 20px var(--glow-white);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.galaxy-system {
    position: relative;
    width: 300px;
    height: 300px;
}

.central-star {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--text-primary);
    border-radius: 50%;
    box-shadow: 0 0 30px var(--glow-white);
    animation: star-pulse 2s ease-in-out infinite;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.orbit-1 {
    width: 80px;
    height: 80px;
    animation: orbit-rotation 8s linear infinite;
}

.orbit-2 {
    width: 140px;
    height: 140px;
    animation: orbit-rotation 12s linear infinite reverse;
}

.orbit-3 {
    width: 200px;
    height: 200px;
    animation: orbit-rotation 16s linear infinite;
}

.planet {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
}

.planet-1 {
    background: var(--text-primary);
    box-shadow: 0 0 10px var(--glow-white);
}

.planet-2 {
    background: var(--text-secondary);
}

.planet-3 {
    background: var(--text-muted);
}

/* Section Styles */
.section-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-4xl);
    font-weight: 900;
    text-align: center;
    margin-bottom: var(--space-3xl);
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: var(--text-primary);
}

/* Demos Section */
.demos-section {
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.demos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.demo-card {
    background: var(--stellar-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-lg);
    transition: var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.demo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--glow-white), transparent);
    transition: var(--transition-slow);
}

.demo-card:hover::before {
    left: 100%;
}

.demo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-dark);
    border-color: var(--text-primary);
}

.demo-visual {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    position: relative;
}

.demo-card h3 {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.demo-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Interactive Section */
.interactive-section {
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.interactive-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.interactive-demo {
    background: var(--stellar-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-lg);
}

.interactive-demo h3 {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.demo-area {
    height: 300px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cosmic-gray);
    cursor: crosshair;
    overflow: hidden;
}

.demo-area canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 10;
}

.trail-instructions,
.particle-instructions,
.gravity-instructions {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-align: center;
    pointer-events: none;
}

/* Documentation Section */
.docs-section {
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.docs-content {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--space-2xl);
}

.docs-sidebar {
    background: var(--stellar-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-lg);
    height: fit-content;
}

.docs-sidebar h3 {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.docs-sidebar ul {
    list-style: none;
}

.docs-sidebar li {
    margin-bottom: var(--space-sm);
}

.docs-sidebar a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.docs-sidebar a:hover {
    color: var(--text-primary);
}

.docs-main {
    background: var(--stellar-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-2xl);
}

.doc-section {
    margin-bottom: var(--space-2xl);
}

.doc-section h3 {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.doc-section pre {
    background: var(--primary-black);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: var(--space-lg);
    overflow-x: auto;
    margin-top: var(--space-md);
}

.doc-section code {
    font-family: var(--font-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

/* Footer */
.galaxy-footer {
    background: var(--primary-black);
    border-top: 1px solid var(--border-color);
    padding: var(--space-3xl) var(--space-lg) var(--space-lg);
    margin-top: var(--space-3xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h4 {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-sm);
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--text-primary);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    box-shadow: 0 0 10px var(--glow-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Animations */
@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

@keyframes nebula-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -20px) scale(1.1); }
}

@keyframes orbit-rotation {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes star-pulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 30px var(--glow-white);
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.2);
        box-shadow: 0 0 50px var(--glow-white);
    }
}

@keyframes title-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes subtitle-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes buttons-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .nav-menu {
        display: none;
    }
    
    .demos-grid {
        grid-template-columns: 1fr;
    }
    
    .interactive-container {
        grid-template-columns: 1fr;
    }
    
    .docs-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .galaxy-system {
        width: 200px;
        height: 200px;
    }
} 

@media (max-width: 768px) {
  .hero-section {
    padding-top: calc(var(--space-3xl) + 3.5rem); /* Extra space for nav + gap */
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding-top: calc(var(--space-3xl) + 2.5rem); /* Slightly less for mobile */
  }
}