/* ============================================
   Black & White Portfolio - Main Stylesheet
   ============================================ */

/* CSS Custom Properties */
:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-dark: #1a1a1a;
    --color-gray-medium: #666666;
    --color-gray-light: #e5e5e5;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: Georgia, 'Times New Roman', serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --container-max-width: 1200px;
    --transition-base: 0.3s ease;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

a {
    color: var(--color-black);
    text-decoration: none;
    transition: opacity var(--transition-base);
}

a:hover {
    opacity: 0.7;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    z-index: 1000;
    border-bottom: 1px solid var(--color-gray-light);
    transition: background-color var(--transition-base);
}

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

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

.nav-link {
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link.active::after,
.nav-link:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--color-black);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    gap: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 1px;
    background-color: var(--color-black);
    transition: all 0.3s cubic-bezier(0.77, 0, 0.175, 1);
}

@media (max-width: 768px) {
    body:has(.nav-menu.active) .nav-toggle span {
        background-color: var(--color-white);
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero-wrapper {
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
    position: relative;
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 600px;
    text-align: left;
    z-index: 2;
    position: relative;
    flex: 1;
}

.hero-image-wrapper {
    position: absolute;
    bottom: 10%;
    right: 5%;
    width: 40%;
    max-width: 500px;
    z-index: 1;
    pointer-events: none;
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(100%) contrast(1.2) brightness(0.9);
    object-fit: contain;
    object-position: bottom right;
    max-height: 70vh;
    opacity: 0.9;
    transition: opacity var(--transition-base), filter var(--transition-base);
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.hero-image:hover {
    opacity: 1;
    filter: grayscale(100%) contrast(1.3) brightness(1);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 400;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-medium);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    text-align: left;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    z-index: 100;
    pointer-events: none;
    color: var(--color-black);
}

.scroll-indicator span {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.scroll-indicator::after {
    content: '↓';
    display: block;
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

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

/* Page Hero (for inner pages) */
.page-hero {
    padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
    text-align: center;
}

.page-title {
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-medium);
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Introduction Section */
.intro-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-white);
}

.intro-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    line-height: 1.8;
    color: var(--color-gray-dark);
}

/* Quick Links Section */
.quick-links-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-gray-light);
}

.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.quick-link {
    padding: var(--spacing-md);
    border: 1px solid var(--color-black);
    text-align: center;
    transition: background-color var(--transition-base);
}

.quick-link:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.quick-link h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.5rem;
}

.quick-link p {
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* About Section */
.about-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content > div {
    margin-bottom: var(--spacing-lg);
}

.about-content h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-content p {
    line-height: 1.8;
    color: var(--color-gray-dark);
}

.skills-list {
    list-style: none;
    padding-left: 0;
}

.skills-list li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-gray-light);
    position: relative;
    padding-left: var(--spacing-md);
}

.skills-list li::before {
    content: '—';
    position: absolute;
    left: 0;
}

/* Projects Section */
.projects-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.project-featured {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    border: 1px solid var(--color-gray-light);
}

.project-content {
    flex: 1;
}

.project-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-xs);
}

.project-tagline {
    font-size: 1.25rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-description {
    margin-bottom: var(--spacing-md);
}

.project-description p {
    font-size: 1.125rem;
    line-height: 1.8;
}

.project-features {
    margin: var(--spacing-lg) 0;
}

.project-features h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.features-list {
    list-style: none;
    padding-left: 0;
}

.features-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-gray-light);
    line-height: 1.8;
}

.project-links {
    margin-top: var(--spacing-lg);
}

.project-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-black);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.project-link:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: clamp(2rem, 4vw, 3rem);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-light);
}

.education-content {
    margin-bottom: var(--spacing-md);
}

.education-content p {
    font-size: 1.125rem;
    line-height: 1.8;
}

/* Parallax Sections */
.parallax-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background-color: var(--color-black);
    z-index: 1;
    isolation: isolate;
}

.parallax-background {
    position: absolute;
    top: -10%;
    left: 0;
    width: 100%;
    height: 120%;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    filter: grayscale(100%) contrast(1.1) brightness(0.5);
    opacity: 0.25;
    transform: translate3d(0, 0, 0);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    perspective: 1000px;
    -webkit-perspective: 1000px;
}

.parallax-section:hover .parallax-background {
    filter: grayscale(100%) contrast(1.2) brightness(0.6);
    opacity: 0.3;
}

/* Smooth parallax effect - disable transitions for better performance */
@media (prefers-reduced-motion: no-preference) {
    .parallax-background {
        transition: filter 0.3s ease, opacity 0.3s ease;
    }
}

/* Reduce parallax on mobile for performance */
@media (max-width: 768px) {
    .parallax-section {
        height: 60vh;
        min-height: 400px;
    }
    
    .parallax-background {
        background-attachment: scroll;
        height: 100%;
        filter: grayscale(100%) contrast(1.1) brightness(0.4);
        opacity: 0.2;
    }
}

.project-card h3 {
    margin-bottom: var(--spacing-sm);
}

/* Work Section */
.work-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.work-intro {
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
    font-size: 1.25rem;
    line-height: 1.8;
}

.work-intro p {
    margin-bottom: var(--spacing-md);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.client-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-light);
    transition: border-color var(--transition-base);
}

.client-card:hover {
    border-color: var(--color-black);
}

.client-name {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.client-description {
    line-height: 1.8;
    color: var(--color-gray-dark);
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
    line-height: 1.8;
}

.contact-form-wrapper {
    margin-bottom: var(--spacing-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    font-family: var(--font-primary);
    font-size: 1rem;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-black);
    background-color: var(--color-white);
    color: var(--color-black);
    resize: vertical;
    transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-gray-medium);
}

.form-submit {
    align-self: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-black);
    color: var(--color-white);
    border: 1px solid var(--color-black);
    font-size: 0.9375rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all var(--transition-base);
}

.form-submit:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.contact-alternative {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-light);
}

.contact-email {
    margin-top: var(--spacing-sm);
    font-size: 1.125rem;
}

.contact-email a {
    text-decoration: underline;
}

/* Footer */
.footer {
    padding: var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid var(--color-gray-light);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

/* Mobile Navigation Overlay */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-black);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s cubic-bezier(0.77, 0, 0.175, 1), visibility 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    pointer-events: none;
}

.nav-overlay.active {
    opacity: 0.95;
    visibility: visible;
    pointer-events: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        flex-direction: column;
        background-color: var(--color-black);
        z-index: 1001;
        justify-content: center;
        align-items: center;
        padding: var(--spacing-xl) 0;
        gap: var(--spacing-md);
        transform: translateX(-100%);
        transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    }

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

    .nav-menu li {
        padding: var(--spacing-sm) 0;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease, transform 0.4s ease;
        transition-delay: 0s;
    }

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

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

    .nav-menu.active li:nth-child(2) {
        transition-delay: 0.15s;
    }

    .nav-menu.active li:nth-child(3) {
        transition-delay: 0.2s;
    }

    .nav-menu.active li:nth-child(4) {
        transition-delay: 0.25s;
    }

    .nav-menu.active li:nth-child(5) {
        transition-delay: 0.3s;
    }

    .nav-link {
        color: var(--color-white);
        font-size: 1.5rem;
        padding: var(--spacing-sm) var(--spacing-md);
        display: block;
        text-align: center;
    }

    .nav-link.active,
    .nav-link:hover {
        color: var(--color-white);
        opacity: 1;
    }

    .nav-link.active::after,
    .nav-link:hover::after {
        height: 2px;
        background-color: var(--color-white);
    }

    .nav-toggle {
        display: flex;
        z-index: 1002;
        position: relative;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
        background-color: var(--color-white);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
        background-color: var(--color-white);
    }

    .nav-logo {
        z-index: 1002;
        position: relative;
        transition: color 0.3s ease;
    }

    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        min-height: calc(100vh - 60px);
        padding-top: 80px;
    }

    .hero-wrapper {
        flex-direction: column;
        text-align: center;
        min-height: auto;
        justify-content: flex-start;
        padding-top: var(--spacing-md);
    }

    .hero-content {
        text-align: center;
        max-width: 100%;
        margin-bottom: var(--spacing-lg);
    }

    .hero-image-wrapper {
        position: relative;
        bottom: auto;
        right: auto;
        width: 80%;
        max-width: 100%;
        margin: 0 auto;
        z-index: 1;
    }

    .hero-image {
        max-height: 50vh;
    }

    .hero {
        position: relative;
        z-index: 0;
    }

    .hero-image-wrapper {
        z-index: 1;
        position: relative;
    }

    .scroll-indicator {
        position: absolute;
        bottom: var(--spacing-md);
        left: var(--spacing-md);
        z-index: 100;
        text-align: left;
        color: var(--color-black);
        font-weight: 600;
    }

    .scroll-indicator span {
        display: block;
        background-color: rgba(255, 255, 255, 0.95);
        padding: var(--spacing-xs) var(--spacing-sm);
        border: 1px solid var(--color-black);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        margin-bottom: var(--spacing-xs);
    }

    .scroll-indicator::after {
        display: block;
        background-color: rgba(255, 255, 255, 0.95);
        padding: var(--spacing-xs) var(--spacing-sm);
        border: 1px solid var(--color-black);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        width: fit-content;
        margin: 0 auto 0 0;
    }

    .quick-links {
        grid-template-columns: 1fr;
    }

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

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

    .parallax-section {
        height: 70vh;
        min-height: 400px;
    }

    .parallax-background {
        background-attachment: scroll;
        height: 100%;
        filter: grayscale(100%) contrast(1.1) brightness(0.6);
        opacity: 0.25;
    }
}

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

    .project-featured {
        padding: var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .navbar,
    .nav-toggle,
    .scroll-indicator,
    .footer {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    a {
        text-decoration: underline;
    }
}