/* CSS Variables */
:root {
    /* Colors */
    --primary-bg: #1A1A1A;
    --secondary-bg: #222222;
    --accent-orange: #FF6600;
    --text-primary: #EAEAEA;
    --text-secondary: #CDCDCD;
    --text-muted: #999999;
    --border-color: #333333;
    
    /* Typography */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    --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;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-max-width: 1140px;
    --section-padding: var(--spacing-3xl);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-navbar: 1000;
    --z-back-to-top: 999;
    --z-hero-content: 10;
    --z-hero-pattern: 5;
    --z-hero-bg: 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);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    overflow-x: hidden;
    position: relative;
}

/* Global Background Texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(45deg, transparent 24%, rgba(255, 255, 255, 0.02) 25%, rgba(255, 255, 255, 0.02) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, 0.02) 75%, rgba(255, 255, 255, 0.02) 76%, transparent 77%, transparent),
        linear-gradient(-45deg, transparent 24%, rgba(255, 255, 255, 0.02) 25%, rgba(255, 255, 255, 0.02) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, 0.02) 75%, rgba(255, 255, 255, 0.02) 76%, transparent 77%, transparent);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-3xl);
}

h4 {
    font-size: var(--font-size-2xl);
}

h5 {
    font-size: var(--font-size-xl);
}

h6 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-md);
}

/* Links */
a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--accent-orange);
}

/* Lists */
ul, ol {
    list-style: none;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

/* Section Styles */
section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--accent-orange);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-orange);
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* Highlight Text */
.highlight {
    color: var(--accent-orange);
    font-weight: 600;
}

/* Geometric Elements */
.geometric-shape {
    position: relative;
}

.geometric-shape::before {
    content: '';
    position: absolute;
    background: var(--accent-orange);
    opacity: 0.1;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-orange);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #ff8533;
}

/* Selection */
::selection {
    background: var(--accent-orange);
    color: var(--primary-bg);
}

::-moz-selection {
    background: var(--accent-orange);
    color: var(--primary-bg);
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--accent-orange);
    outline-offset: 2px;
}

/* Smooth Animations */
* {
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

/* Grid System Helper */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

/* Geometric Icons Base */
.icon {
    width: 24px;
    height: 24px;
    position: relative;
    display: inline-block;
}

.icon::before,
.icon::after {
    content: '';
    position: absolute;
    background: currentColor;
}

/* Loading Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Typography */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --section-padding: var(--spacing-2xl);
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
}