:root {
    /* Light Theme */
    --light-bg: #ffffff;
    --light-surface: #f8f9fa;
    --light-text: #333333;
    --light-text-secondary: #666666;
    --light-accent: #1a365d;
    --light-accent-hover: #2a466d;
    --light-border: #e0e0e0;

    /* Dark Theme */
    --dark-bg: #030303;
    --dark-surface: #121212;
    --dark-text: #f0f0f0;
    --dark-text-secondary: #b0b0b0;
    --dark-accent: #00f3ff;
    --dark-accent-hover: #33f5ff;
    --dark-border: #2a2a2a;

    /* Common */
    --transition-speed: 0.3s;
    --container-width: 1200px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1.6;
    transition: background-color var(--transition-speed),
                color var(--transition-speed);
    overflow-x: hidden;
}

/* Theme Styles */
body.light-theme {
    background-color: var(--light-bg);
    color: var(--light-text);
}

body.dark-theme {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

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

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
}

.logo h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    background: linear-gradient(45deg, var(--dark-accent), #fff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Theme Toggle */
#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    position: relative;
    transition: transform var(--transition-speed);
}

#theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle-icon {
    display: block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.light-theme .theme-toggle-icon {
    background: #ffd700;
    box-shadow: 0 0 15px #ffd700;
}

.dark-theme .theme-toggle-icon {
    background: #c6c6c6;
    box-shadow: 0 0 15px #c6c6c6;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--space-lg) 0;
    overflow: hidden;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 5vw, 4rem);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin-bottom: var(--space-lg);
    opacity: 0.9;
}

/* Stars Background */
.stars-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.dark-theme .stars-background {
    background: radial-gradient(circle at center,
        rgba(0, 243, 255, 0.1) 0%,
        rgba(3, 3, 3, 1) 100%);
}

.light-theme .stars-background {
    background: radial-gradient(circle at center,
        rgba(26, 54, 93, 0.1) 0%,
        rgba(255, 255, 255, 1) 100%);
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    text-decoration: none;
    border-radius: 30px;
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.dark-theme .cta-button {
    background: var(--dark-accent);
    color: var(--dark-bg);
    box-shadow: 0 0 20px var(--dark-accent);
}

.light-theme .cta-button {
    background: var(--light-accent);
    color: var(--light-bg);
    box-shadow: 0 0 20px var(--light-accent);
}

.cta-button:hover {
    transform: scale(1.05);
}

/* Services Section */
.services {
    padding: var(--space-lg) 0;
}

.services h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
    font-family: 'Orbitron', sans-serif;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
    padding: var(--space-md) 0;
}

.service-card {
    padding: var(--space-md);
    border-radius: 15px;
    transition: transform var(--transition-speed);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dark-theme .service-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--dark-border);
}

.light-theme .service-card {
    background: rgba(26, 54, 93, 0.05);
    border: 1px solid var(--light-border);
}

.service-card:hover {
    transform: translateY(-10px);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--space-sm);
}

.service-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.dark-theme .service-icon svg {
    stroke: var(--dark-accent);
}

.light-theme .service-icon svg {
    stroke: var(--light-accent);
}

/* Contact Section */
.contact {
    padding: var(--space-lg) 0;
}

.contact h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
    font-family: 'Orbitron', sans-serif;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-md);
    border-radius: 15px;
}

.dark-theme .contact-form {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--dark-border);
}

.light-theme .contact-form {
    background: rgba(26, 54, 93, 0.05);
    border: 1px solid var(--light-border);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm);
    border-radius: 8px;
    border: 1px solid;
    background: transparent;
    color: inherit;
    font-family: inherit;
    transition: border-color var(--transition-speed);
}

.dark-theme .form-group input,
.dark-theme .form-group textarea {
    border-color: var(--dark-border);
}

.light-theme .form-group input,
.light-theme .form-group textarea {
    border-color: var(--light-border);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: currentColor;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-button {
    display: block;
    width: 100%;
    padding: var(--space-sm);
    border: none;
    border-radius: 8px;
    font-family: 'Orbitron', sans-serif;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.dark-theme .submit-button {
    background: var(--dark-accent);
    color: var(--dark-bg);
}

.light-theme .submit-button {
    background: var(--light-accent);
    color: var(--light-bg);
}

.submit-button:hover {
    transform: scale(1.02);
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.social-icon {
    width: 30px;
    height: 30px;
    transition: transform var(--transition-speed);
}

.dark-theme .social-icon {
    fill: var(--dark-text);
}

.light-theme .social-icon {
    fill: var(--light-text);
}

.social-icon:hover {
    transform: scale(1.2);
}

/* Footer */
.main-footer {
    padding: var(--space-md) 0;
    text-align: center;
    border-top: 1px solid;
}

.dark-theme .main-footer {
    border-color: var(--dark-border);
}

.light-theme .main-footer {
    border-color: var(--light-border);
}

.footer-link {
    color: inherit;
    text-decoration: none;
    margin-left: var(--space-sm);
    transition: opacity var(--transition-speed);
}

.footer-link:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --space-lg: 3rem;
        --space-md: 1.5rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 2rem;
        --space-md: 1rem;
    }

    .container {
        padding: 0 var(--space-sm);
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .social-links {
        gap: var(--space-sm);
    }
}