:root {
    /* Color Palette */
    --clr-surface: #051424;
    --clr-surface-light: #0a1f38;
    --clr-primary: #6366f1;
    --clr-primary-hover: #4f46e5;
    --clr-secondary: #2c3a4c;
    --clr-text-main: #ffffff;
    --clr-text-muted: #94a3b8;
    --clr-border: rgba(255, 255, 255, 0.1);
    --clr-danger: #ef4444;
    
    /* Typography */
    --font-family: 'Hanken Grotesk', sans-serif;
    
    /* Spacing & Layout */
    --container-max: 1200px;
    --radius: 8px;
    --transition-fast: 0.2s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    background-color: var(--clr-surface);
    color: var(--clr-text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* Typography Utilities */
h1, h2, h3, h4, .brand {
    line-height: 1.2;
    font-weight: 700;
}

p {
    color: var(--clr-text-muted);
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

/* Grid System */
.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--clr-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.btn-outline:hover {
    background-color: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--clr-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.badge-outline {
    background-color: transparent;
    border: 1px solid var(--clr-secondary);
    color: var(--clr-text-muted);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background-color: rgba(5, 20, 36, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--clr-border);
}

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

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--clr-text-main);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--clr-text-main);
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--clr-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn .bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--clr-text-main);
    margin: 5px 0;
    transition: 0.3s;
}

.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--clr-surface);
    padding: 1.5rem;
    flex-direction: column;
    gap: 1rem;
    border-bottom: 1px solid var(--clr-border);
}

.mobile-nav.active {
    display: flex;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 8rem;
    position: relative;
    overflow: hidden;
}

/* Background ambient glow */
.hero-section::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(5, 20, 36, 0) 70%);
    transform: translate(-50%, -50%);
    z-index: -1;
    border-radius: 50%;
}

.hero-content {
    grid-column: span 6;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    grid-column: span 6;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Featured Portfolio */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--clr-text-muted);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
    color: var(--clr-text-main);
    background-color: var(--clr-surface-light);
}

.portfolio-card {
    background-color: var(--clr-surface-light);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform var(--transition-fast);
    border: 1px solid transparent;
}

.portfolio-card:hover {
    transform: translateY(-8px);
    border-color: var(--clr-border);
}

.card-visual {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .card-img {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(5,20,36,0.9), transparent);
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.portfolio-card:hover .card-overlay {
    opacity: 1;
}

.view-case-study {
    color: white;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.view-case-study .arrow {
    transition: transform var(--transition-fast);
}

.view-case-study:hover .arrow {
    transform: translateX(5px);
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-desc {
    font-size: 0.95rem;
}



input, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    color: var(--clr-text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
}

/* Contact */
.contact-section {
    background-color: var(--clr-surface-light);
}

.contact-container {
    max-width: 800px;
}

.contact-header {
    text-align: center;
    margin-bottom: 3rem;
}

.contact-form {
    background-color: var(--clr-surface);
    padding: 3rem;
    border-radius: var(--radius);
    border: 1px solid var(--clr-border);
}

.grid-2-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-status {
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
    display: none;
}

.form-status.success {
    color: #10b981;
    display: block;
}

/* Footer */
.footer {
    border-top: 1px solid var(--clr-border);
    padding: 4rem 0 2rem;
}

.footer-brand .brand-logo {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-links h4 {
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--clr-text-muted);
}

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

.footer-bottom {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--clr-border);
    text-align: center;
    font-size: 0.875rem;
    color: var(--clr-text-muted);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.fade-delay-1 { transition-delay: 0.1s; }
.fade-delay-2 { transition-delay: 0.2s; }
.fade-delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 992px) {
    .grid-12, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-content, .hero-visual {
        grid-column: span 2;
    }
    
    .hero-section {
        padding-top: 6rem;
        text-align: center;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .grid-3, .grid-2, .grid-2-form {
        grid-template-columns: 1fr;
    }
    
    .grid-12, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}