/* ========== CSS RESET & BASE STYLES ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --background: #0A0A0A;
    --text-primary: #FFFFFF;
    --text-secondary: #999999;
    --accent-purple: #8B5CF6;
    --accent-green: #86EFAC;
    --card-bg: #1A1A1A;
    
    /* Fonts */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 1rem;
    --transition-speed: 0.3s;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(180deg, 
        #010208 16%, 
        #010206 21%, 
        #040008 25%, 
        #010101 30%, 
        #010101 34%, 
        #010101 36%, 
        #010101 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--transition-speed) ease;
}

a:hover,
a:focus {
    opacity: 0.8;
}

a:focus-visible {
    outline: 2px solid var(--accent-purple);
    outline-offset: 4px;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

/* Skip to main content link for accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-purple);
    color: white;
    padding: 1rem 2rem;
    z-index: 100;
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
}

/* ========== HEADER & NAVIGATION ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: transparent;
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    transition: background-color 0.3s ease;
}

.header.scrolled {
    background-color: #040008;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-purple);
    background: linear-gradient(135deg, #8B5CF6, #EC4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mobile Navigation */
.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--card-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
}

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

.nav-menu li {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.nav-menu.active li {
    opacity: 1;
    transform: translateX(0);
}

.nav-menu.active li:nth-child(1) { 
    transition-delay: 0.1s; 
}

.nav-menu.active li:nth-child(2) { 
    transition-delay: 0.2s; 
}

.nav-menu.active li:nth-child(3) { 
    transition-delay: 0.3s; 
}

.nav-link {
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    padding: 1rem;
    position: relative;
    transition: color var(--transition-speed) ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    /* background: linear-gradient(90deg, #BC3CD8 0%, #C54B8C 100%); */
    background-color: var(--text-primary);
    transition: width var(--transition-speed) ease;
}

.nav-link:hover,
.nav-link:focus {
    background: linear-gradient(90deg, #BC3CD8 0%, #C54B8C 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link.active {
    background: linear-gradient(90deg, #BC3CD8 0%, #C54B8C 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link.active::after {
    width: 40%;
}

/* Hamburger Menu Button */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0.5rem;
    z-index: 1002;
    transition: transform var(--transition-speed) ease;
}

.menu-toggle:focus-visible {
    outline: 2px solid var(--accent-purple);
    outline-offset: 4px;
    border-radius: 4px;
}

.hamburger {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
    border-radius: 2px;
}

.menu-toggle.active .hamburger:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.menu-toggle.active .hamburger:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
    z-index: 999;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ========== HERO SECTION ========== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    font-family: 'Work Sans', var(--font-family);
}

.hero-title {
    color: #E3E4E6;
    font-size: 2rem;
    font-weight: 100;
    line-height: 1.4;
    max-width: 900px;
    margin-bottom: 3rem;
}

.highlight {
    color: var(--text-secondary);
}

.highlight-bold {
    font-weight: 700;
    color: var(--text-primary);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    animation: bounce 2s infinite;
    color: var(--text-secondary);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ========== CLIENTS SECTION ========== */
.clients {
    padding: 4rem 2rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.section-subtitle {
    font-size: 1rem;
    font-weight: 300;
    font-size: 2em;
    /* text-align: center; */
    margin-bottom: 3rem;
    color: var(--text-secondary);

}

.clients-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 3rem;
}

.client-logo {
    opacity: 0.6;
    transition: opacity var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.client-logo:hover,
.client-logo:focus-within {
    opacity: 1;
    transform: scale(1.05);
}

.client-logo img {
    width: 120px;
    height: 50px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.client-logo svg,
.client-logo svg * {
    fill: white !important;
    fill-opacity: 1 !important;
}

/* ========== WORKS SECTION ========== */
.works {
    padding: 4rem 2rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.works-grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-top: 3rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.project-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: var(--card-bg);
    aspect-ratio: 16 / 10;
}

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

.project-card:hover .project-image img,
.project-card:focus-within .project-image img {
    transform: scale(1.05);
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.project-category {
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    text-transform: uppercase;
}

.project-description {
    font-family: 'Work Sans', var(--font-family);
    font-size: 1.5rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.project-meta {
    font-size: .75rem;
    color: var(--text-secondary);
    /* text-transform: uppercase; */
    letter-spacing: 0.1em;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 2rem;
    width: fit-content;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.project-link.filled {
    background-color: var(--accent-purple);
    border-color: var(--accent-purple);
}

.project-link:hover,
.project-link:focus {
    opacity: 1;
    transform: translateX(4px);
    border-color: var(--accent-purple);
}

.project-link.filled:hover,
.project-link.filled:focus {
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

/* ========== ABOUT SECTION ========== */
.about {
    padding: 4rem 2rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
}

#about-heading.section-title {
    margin-bottom: 0;
    font-size: 1rem;
    font-weight: 500;
}

.about-content {
    display: flex;
    flex-direction: column;
    /* gap: 2rem; */
}

.about-text {
    font-family: 'Work Sans', var(--font-family);
    font-size: 1.6rem;
    color: var(--text-secondary);
}

.about-image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 25px;
}

.about-image-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1rem;
    transition: transform var(--transition-speed) ease;
}

.about-image-grid img:nth-child(1) {
    grid-row: 1 / 3;    
    position: relative;
    top: 25px;
    width: 282px;
    height: 374px;
}

.about-image-grid img:hover,
.about-image-grid img:focus {
    transform: scale(1.05);
}

/* ========== CONTACT SECTION ========== */
.contact {
    padding: 4rem 2rem 3rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
    text-align: center;
}

.contact-title {
    font-size: 2rem;
    font-weight: 100;
}

.contact-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.social-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* border: 2px solid var(--text-secondary); */
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition-speed) ease;
}

.social-link img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(0.6);
    transition: filter var(--transition-speed) ease;
}

.social-link:hover,
.social-link:focus {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    transform: translateY(-4px);
    opacity: 1;
}

.social-link:hover img,
.social-link:focus img {
    filter: brightness(0) invert(1);
}

/* ========== FOOTER ========== */

.footer {
    padding: 2rem;
    text-align: center;
    font-size: .75rem;
    color: var(--text-secondary);
    /* border-top: 1px solid rgba(255, 255, 255, 0.1); */
}

/* ========== RESPONSIVE DESIGN - TABLET ========== */
@media (min-width: 768px) {
    :root {
        --font-size-h1: 3rem;
        --font-size-h2: 2rem;
        --font-size-h3: 1.25rem;
        --spacing-md: 3rem;
        --spacing-lg: 4rem;
        --spacing-xl: 6rem;
    }
    
    .nav-container {
        padding: 0 3rem;
    }
    
    .menu-toggle {
        display: none;
    }
    
    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        flex-direction: row;
        gap: 25px;
        background-color: transparent;
        box-shadow: none;
    }
    
    .nav-menu li {
        opacity: 1;
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: .75rem;
        padding: 0.5rem 0;
    }
    
    .nav-link::after {
        bottom: -2px;
    }
    
    .clients-grid {
        flex-wrap: nowrap;
    }
    
    .client-logo img {
        max-width: 150px;
    }
    
    .project-card {
        flex-direction: row;
        align-items: flex-end;
    }
    
    /* .project-card-reverse {
        flex-direction: row-reverse;
    } */
    
    .project-image,
    .project-info {
        flex: 1;
    }
    
    .about {
        flex-direction: row;
        gap: 4rem;
    }
    
    .about-content,
    .about-images {
        flex: 1;
    }
    
    .about-image-grid {
        height: 400px;
    }

    .about-image-grid img:nth-child(1) {
        top: 114px;
    }
    
    .contact-title {
        font-size: 2.5rem;
    }
}

/* ========== RESPONSIVE DESIGN - DESKTOP ========== */
@media (min-width: 1024px) {
    :root {
        --font-size-h1: 3.5rem;
        --font-size-h2: 2.5rem;
        --spacing-xl: 8rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .about-image-grid {
        height: 500px;
    }
    
    .contact-title {
        font-size: 3.5rem;
    }
}

/* ========== ACCESSIBILITY & REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--accent-purple);
    outline-offset: 4px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-secondary: #CCCCCC;
    }
    
    .nav-link,
    .project-link,
    .social-link {
        border: 2px solid currentColor;
    }
}

/* Print styles */
@media print {
    .header,
    .menu-toggle,
    .mobile-menu-overlay,
    .scroll-indicator {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
}