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

:root {
    /* Dark Theme Color System */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #161616;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --orange-400: #fb923c;
    --orange-500: #f97316;
    --orange-600: #ea580c;
    
    --accent-gradient: linear-gradient(135deg, #f97316 0%, #fb923c 50%, #fdba74 100%);
    --text-gradient: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    
    --border-primary: #27272a;
    --border-secondary: #3f3f46;
    
    /* Spacing System */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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;
    --font-size-6xl: 3.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
    
    /* Border Radius */
    --radius-sm: 0.125rem;
    --radius: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: var(--font-size-base);
    font-weight: 400;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Gradient Text */
.gradient-text {
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    font-size: var(--font-size-xl);
}

.logo-text {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.logo-link {
    text-decoration: none;
    transition: var(--transition-fast);
    border-radius: var(--radius);
    padding: var(--space-2) var(--space-3);
    margin: calc(-1 * var(--space-2)) calc(-1 * var(--space-3));
}

.logo-link:hover {
    background: rgba(249, 115, 22, 0.1);
}

.logo-link:hover .logo-text {
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: var(--space-2) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: var(--accent-gradient);
    transition: var(--transition-normal);
}

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

.nav-cta {
    display: block;
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: var(--space-1);
}

.bar {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: var(--radius);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(249, 115, 22, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-6);
}

.hero-badge span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--orange-400);
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.company-name {
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--font-size-6xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    text-shadow: 0 0 30px rgba(249, 115, 22, 0.3);
}

.title-separator {
    color: var(--orange-400);
    font-size: var(--font-size-2xl);
    font-weight: 300;
    margin: var(--space-1) 0;
    opacity: 0.8;
}

.company-description {
    font-size: var(--font-size-2xl);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.3;
}

.highlight-text {
    background: linear-gradient(135deg, #f97316 0%, #fb923c 50%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.01em;
    position: relative;
}

.highlight-text::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius);
    animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% {
        opacity: 0.5;
        transform: scaleX(1);
    }
    50% {
        opacity: 1;
        transform: scaleX(1.05);
    }
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-8);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.sphere-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.sphere {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 450px;
    height: 450px;
    background-image: url('/public/Logo_HK_Brothers.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    filter: drop-shadow(0 0 30px rgba(249, 115, 22, 0.4));
    animation: float 6s ease-in-out infinite;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(249, 115, 22, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.orbit-1 {
    width: 280px;
    height: 280px;
    animation-duration: 15s;
}

.orbit-2 {
    width: 340px;
    height: 340px;
    animation-duration: 25s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 400px;
    height: 400px;
    animation-duration: 35s;
}

.orbit::before {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--orange-400);
    border-radius: 50%;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 10px var(--orange-400);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-xl);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
    min-height: 48px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--text-primary);
    border: 1px solid var(--orange-500);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(249, 115, 22, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-secondary);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--orange-400);
}

.btn-full {
    width: 100%;
}

/* Section Styles */
section {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-header h2 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.about-card:hover::before {
    transform: scaleX(1);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--orange-500);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-4);
}

.about-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Projects Section */
.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--orange-500);
    box-shadow: var(--shadow-xl);
}

.project-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.5;
}

.project-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 48px;
}

.project-logo {
    height: 60px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-normal);
}

.project-card:hover .project-logo {
    transform: scale(1.1);
}

.project-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.feature-tag {
    background: rgba(249, 115, 22, 0.1);
    color: var(--orange-400);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.project-status {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-status.available {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.project-status.upcoming {
    background: rgba(249, 115, 22, 0.1);
    color: var(--orange-400);
    border: 1px solid rgba(249, 115, 22, 0.2);
}

/* Mission Section */
.mission {
    background: var(--bg-secondary);
}

.mission-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.mission-text h2 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

.mission-statement {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-12);
}

.mission-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-8);
}

.stat-item {
    text-align: center;
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-2px);
    border-color: var(--orange-500);
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-2);
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: var(--bg-primary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-info h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.contact-info > p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-8);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--orange-500);
    transform: translateX(4px);
}

.contact-icon {
    font-size: var(--font-size-xl);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(249, 115, 22, 0.1);
    border-radius: var(--radius-lg);
}

.contact-item h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

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

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-4);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--orange-500);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    margin-bottom: var(--space-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

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

.footer-section li {
    margin-bottom: var(--space-2);
}

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

.footer-section a:hover {
    color: var(--orange-400);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-primary);
    color: var(--text-muted);
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0px);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-10px);
    }
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .company-name {
        font-size: var(--font-size-5xl);
    }
    
    .company-description {
        font-size: var(--font-size-xl);
    }
    
    .highlight-text {
        font-size: var(--font-size-2xl);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
    }
    
    .sphere-container {
        width: 300px;
        height: 300px;
    }
    
    .sphere {
        width: 300px;
        height: 300px;
    }
    
    .orbit-1 {
        width: 210px;
        height: 210px;
    }
    
    .orbit-2 {
        width: 255px;
        height: 255px;
    }
    
    .orbit-3 {
        width: 300px;
        height: 300px;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: var(--space-6);
    }
    
    .about-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-6);
    }
    
    .mission-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .nav-container {
        padding: 0 var(--space-4);
        height: 70px;
    }
    
    .navbar {
        backdrop-filter: blur(15px);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: var(--transition-normal);
        border-top: 1px solid var(--border-primary);
        padding: var(--space-8) 0;
        gap: var(--space-4);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-cta {
        display: none;
    }

    .nav-menu .nav-cta {
        display: block;
        margin-top: var(--space-4);
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    section {
        padding: var(--space-20) 0;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
        gap: var(--space-1);
    }
    
    .company-name {
        font-size: var(--font-size-4xl);
    }
    
    .company-description {
        font-size: var(--font-size-lg);
    }
    
    .highlight-text {
        font-size: var(--font-size-xl);
    }
    
    .title-separator {
        font-size: var(--font-size-lg);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
        margin-bottom: var(--space-6);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-3);
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .section-header h2 {
        font-size: var(--font-size-4xl);
        margin-bottom: var(--space-3);
    }
    
    .section-header p {
        font-size: var(--font-size-base);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .about-card,
    .project-card {
        padding: var(--space-6);
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .mission-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }
    
    .contact-info h2 {
        font-size: var(--font-size-3xl);
    }
    
    .contact-info > p {
        font-size: var(--font-size-base);
    }
    
    .contact-form {
        padding: var(--space-6);
    }
    
    .sphere-container {
        width: 280px;
        height: 280px;
    }
    
    .sphere {
        width: 280px;
        height: 280px;
    }
    
    .orbit-1 {
        width: 200px;
        height: 200px;
    }
    
    .orbit-2 {
        width: 240px;
        height: 240px;
    }
    
    .orbit-3 {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .nav-container {
        padding: 0 var(--space-4);
        height: 60px;
    }
    
    .logo-text {
        font-size: var(--font-size-base);
    }
    
    section {
        padding: var(--space-16) 0;
    }
    
    .section-header {
        margin-bottom: var(--space-12);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        gap: var(--space-1);
    }
    
    .company-name {
        font-size: var(--font-size-3xl);
    }
    
    .company-description {
        font-size: var(--font-size-base);
    }
    
    .highlight-text {
        font-size: var(--font-size-lg);
    }
    
    .title-separator {
        font-size: var(--font-size-base);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-4);
    }
    
    .section-header h2 {
        font-size: var(--font-size-3xl);
    }
    
    .section-header p {
        font-size: var(--font-size-sm);
    }
    
    .contact-info h2 {
        font-size: var(--font-size-3xl);
    }
    
    .contact-info > p {
        font-size: var(--font-size-sm);
    }
    
    .about-card,
    .project-card {
        padding: var(--space-5);
    }
    
    .project-card h3 {
        font-size: var(--font-size-xl);
    }
    
    .about-card h3 {
        font-size: var(--font-size-lg);
    }
    
    .mission-statement {
        font-size: var(--font-size-lg);
    }
    
    .mission-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .contact-form {
        padding: var(--space-5);
    }
    
    .form-group {
        margin-bottom: var(--space-4);
    }
    
    .contact-details {
        gap: var(--space-4);
    }
    
    .contact-item {
        padding: var(--space-3);
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    .sphere-container {
        width: 250px;
        height: 250px;
    }
    
    .sphere {
        width: 250px;
        height: 250px;
    }
    
    .orbit-1 {
        width: 180px;
        height: 180px;
    }
    
    .orbit-2 {
        width: 215px;
        height: 215px;
    }
    
    .orbit-3 {
        width: 250px;
        height: 250px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for accessibility */
.btn:focus-visible,
.nav-link:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--orange-500);
    outline-offset: 2px;
}

/* Loading states */
.form-loading {
    opacity: 0.7;
    pointer-events: none;
}

.form-loading .btn {
    background: var(--bg-tertiary);
    cursor: not-allowed;
}

/* Success/Error states */
.form-success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--space-4);
}

.form-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--space-4);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: var(--radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--orange-500);
}

/* Selection */
::selection {
    background: rgba(249, 115, 22, 0.3);
    color: var(--text-primary);
}