:root {
    --color-primary: #0a0e1a;          /* very dark background */
    --color-secondary: #101326;        /* deep slate for gradients */
    --color-accent: #38bdf8;           /* cyber blue accent */
    --color-accent-muted: #0ea5e9;

    --color-text: #e5e7eb;             /* light gray main text */
    --color-text-light: #9ca3af;       /* muted secondary text */

    --color-background: #0a0e1a;       /* page background */
    --color-background-alt: #0f1226;   /* slightly lighter for cards/sections */
    --color-surface: #1a1f33;          /* for cards and forms */

    --color-border: #1f2937;
    --color-overlay: rgba(10, 14, 26, 0.85);

    --spacing-unit: 1rem;
    --transition-speed: 0.25s;
    --header-height: 80px;
    --border-radius: 12px;             /* rounded corners for boxes/buttons/images */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 2);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    height: var(--header-height);
    border-radius: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    width: 200px;            
    height: auto;            
    object-fit: contain;     
}

.nav {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
    letter-spacing: 0.3px;
}

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

.cta-button {
    background-color: var(--color-accent);
    color: var(--color-background);
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    border: none;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    letter-spacing: 0.3px;
}

.cta-button:hover {
    background-color: var(--color-accent-muted);
    transform: translateY(-2px);
}

main {
    margin-top: var(--header-height);
}

#hero {
    position: relative;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    color: var(--color-text);
    padding: calc(var(--spacing-unit) * 8) 0;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

#hero h1 {
    font-size: 3rem;
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    letter-spacing: -0.5px;
}

#hero p {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    opacity: 0.85;
    font-weight: 300;
}

.primary-cta {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-background);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2.5);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 1.125rem;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    letter-spacing: 0.3px;
}

.primary-cta:hover {
    background-color: var(--color-accent-muted);
    transform: translateY(-2px);
}

#services {
    padding: calc(var(--spacing-unit) * 6) 0;
    background-color: var(--color-background-alt);
}

#services h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: calc(var(--spacing-unit) * 3);
    text-align: center;
    color: var(--color-accent);
    letter-spacing: -0.5px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: calc(var(--spacing-unit) * 2.5);
}

.service-item {
    background-color: var(--color-surface);
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.service-item:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    transform: translateY(-2px);
}

.service-item h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    color: var(--color-accent);
}

.service-item p {
    color: var(--color-text-light);
    line-height: 1.7;
    font-size: 0.9375rem;
}

#portfolio {
    padding: calc(var(--spacing-unit) * 6) 0;
}

.portfolio-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto calc(var(--spacing-unit) * 4) auto;
}

.portfolio-intro h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--color-accent);
    letter-spacing: -0.5px;
}

.portfolio-intro p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--spacing-unit) * 1.5);
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    cursor: pointer;
    border-radius: var(--border-radius);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
    transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay);
    opacity: 0;
    border-radius: var(--border-radius);
    transition: opacity var(--transition-speed) ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--spacing-unit) * 2);
}

.portfolio-text {
    color: var(--color-background);
    text-align: center;
}

.portfolio-text h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
	color: white;
}

.portfolio-text p {
    font-size: 0.9375rem;
    line-height: 1.6;
    opacity: 0.95;
	color: white;
}

.portfolio-item:hover img {
    transform: scale(1.05);
    opacity: 0.3;
}

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

#contact {
    padding: calc(var(--spacing-unit) * 6) 0;
    background-color: var(--color-background-alt);
}

#contact h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    text-align: center;
    color: var(--color-accent);
}

.contact-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto calc(var(--spacing-unit) * 3) auto;
    color: var(--color-text-light);
    line-height: 1.7;
}

.contact-grid-wrapper {
    display: flex;
    justify-content: center;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 2);
    max-width: 600px;
    width: 100%;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 2);
    text-align: center;
    color: inherit;
    transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

.contact-item:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    transform: translateY(-2px);
    background-color: #2a2a2a;
}

.contact-item h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--color-accent);
}

.contact-item p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

@media (min-width: 600px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    #contact h2 {
        font-size: 2rem;
    }
    .contact-item h3 {
        font-size: 1.125rem;
    }
    .contact-item p {
        font-size: 0.9375rem;
    }
}


footer {
    background-color: var(--color-primary);
    color: var(--color-background);
    padding: calc(var(--spacing-unit) * 3) 0;
    border-radius: 0;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    font-size: 0.9375rem;
}

.footer-secondary {
    opacity: 0.7;
    font-size: 0.875rem;
}

@media (max-width: 968px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .services-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-unit);
    }
}