/* ============================================
   Futuristic Theme - Main Stylesheet
   ============================================ */

/* CSS Variables for consistent theming */
:root {
    /* Color Palette - Futuristic Blue/Purple/Cyan */
    --primary-color: #00d4ff;
    --primary-dark: #0099cc;
    --secondary-color: #7b2cbf;
    --accent-color: #ff006e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --background-dark: #0a0e27;
    --background-darker: #060920;
    --background-card: #0f1435;
    --border-color: #1a2347;
    --shadow-color: rgba(0, 212, 255, 0.2);
    --glow-color: rgba(0, 212, 255, 0.4);
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--background-darker) 0%, var(--background-dark) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Animated Background Effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(123, 44, 191, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 0, 110, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Container Styles */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
}

/* Header Styles */
header {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

/* Typography */
h1 {
    font-size: 2.5em;
    color: var(--primary-color);
    margin-bottom: 0.3em;
    text-shadow: 0 0 20px var(--glow-color);
    letter-spacing: 1px;
    font-weight: 700;
}

h2 {
    font-size: 1.8em;
    color: var(--primary-color);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    padding-bottom: 0.3em;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

h2::before {
    content: '▸';
    color: var(--accent-color);
    margin-right: 0.5em;
}

h3 {
    font-size: 1.3em;
    color: var(--text-primary);
    margin-top: 1.2em;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 1em;
    color: var(--text-secondary);
}

.tagline {
    font-size: 1.2em;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.5px;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
}

a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 8px var(--glow-color);
}

a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width var(--transition-fast);
}

a:hover::after {
    width: 100%;
}

/* Cards */
.card {
    background: var(--background-card);
    padding: var(--spacing-md);
    margin: var(--spacing-sm) 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(0, 212, 255, 0.05) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    border-left-color: var(--accent-color);
    box-shadow: 0 8px 20px var(--shadow-color);
    transform: translateY(-2px);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Section Styles */
.section {
    margin-bottom: var(--spacing-xl);
}

/* Navigation Links */
.nav-links {
    background: var(--background-card);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    border: 1px solid var(--border-color);
}

.nav-links a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--background-darker);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.nav-links a::after {
    display: none;
}

.nav-links a:hover {
    background: var(--primary-color);
    color: var(--background-darker);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px var(--glow-color);
    transform: translateY(-2px);
}

/* Lists */
ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: 1em;
}

li {
    margin-bottom: 0.5em;
    color: var(--text-secondary);
}

/* Code */
code {
    background: var(--background-darker);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

pre {
    background: var(--background-darker);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow-x: auto;
    margin-bottom: 1em;
}

pre code {
    background: none;
    padding: 0;
    border: none;
}

/* Emoji */
.emoji {
    margin-right: 0.5em;
}

/* Footer */
footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9em;
}

footer a {
    color: var(--text-secondary);
}

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

/* Description (for homepage) */
.description {
    font-size: 1.1em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

/* Centered Layout (for homepage) */
.centered-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.centered-container .container {
    background: var(--background-card);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 30px var(--shadow-color);
    text-align: center;
    border: 1px solid var(--border-color);
    max-width: 800px;
}

/* Glow Effects on Important Elements */
.glow {
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 10px var(--glow-color), 0 0 20px var(--glow-color);
    }
    to {
        text-shadow: 0 0 20px var(--glow-color), 0 0 30px var(--glow-color);
    }
}

/* Buttons (if needed) */
.btn {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--background-darker);
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9em;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px var(--shadow-color);
}

.btn::after {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }
    
    .container {
        padding: var(--spacing-sm);
    }
    
    .centered-container .container {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    h1 {
        font-size: 2em;
    }
    
    h2 {
        font-size: 1.5em;
    }
    
    .nav-links {
        flex-direction: column;
    }
    
    .nav-links a {
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8em;
    }
    
    h2 {
        font-size: 1.3em;
    }
    
    .tagline {
        font-size: 1em;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .nav-links,
    footer {
        display: none;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .card {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}