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

:root {
    /* Yellow & Black Color Scheme */
    --primary-yellow: #FFD700;
    --highlight-yellow: #FFED4E;
    --dark-yellow: #E6C200;
    --pure-black: #000000;
    --dark-gray: #0D0D0D;
    --medium-gray: #1A1A1A;
    --light-gray: #333333;
    --text-gray: #CCCCCC;
    --white: #FFFFFF;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(255, 215, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(255, 215, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(255, 215, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(255, 215, 0, 0.4);
    --shadow-glow-strong: 0 0 40px rgba(255, 215, 0, 0.6);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-gray);
    background-color: var(--pure-black);
    overflow-x: hidden;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-yellow {
    color: var(--primary-yellow);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-yellow);
    color: var(--pure-black);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--highlight-yellow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-yellow);
    border: 2px solid var(--primary-yellow);
}

.btn-outline:hover {
    background-color: var(--primary-yellow);
    color: var(--pure-black);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--primary-yellow);
    box-shadow: var(--shadow-lg);
}

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

.nav-logo a {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.nav-logo a:hover {
    color: var(--primary-yellow);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-normal);
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

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

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

.hire-btn {
    background-color: var(--primary-yellow);
    color: var(--pure-black) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
}

.hire-btn:hover {
    background-color: var(--highlight-yellow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.hire-btn::after {
    display: none;
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--primary-yellow);
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--pure-black) 0%, var(--dark-gray) 100%);
    overflow: hidden;
}

.hero-bg-animation {
    position: absolute;
    inset: 0;
    opacity: 0.1;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: var(--primary-yellow);
    filter: blur(100px);
    animation: float 6s ease-in-out infinite;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: 25%;
    left: 25%;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    bottom: 25%;
    right: 25%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) scale(1); }
    50% { transform: translateY(-20px) scale(1.1); }
}

.hero-content {
    text-align: center;
    z-index: 10;
    animation: slideUp 1s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.profile-photo {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-lg);
}

.profile-photo img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 4px solid var(--primary-yellow);
    box-shadow: var(--shadow-glow);
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.4); }
    50% { box-shadow: 0 0 40px rgba(255, 215, 0, 0.8); }
}

.profile-overlay {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, rgba(255, 215, 0, 0.2));
    pointer-events: none;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--text-gray);
    font-weight: var(--font-weight-normal);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

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

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--primary-yellow);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 4px;
    height: 12px;
    background-color: var(--primary-yellow);
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(12px); }
}

/* Section Styles */
section {
    padding: var(--spacing-xxl) 0;
}

.projects {
    background-color: var(--dark-gray);
}

.resume {
    background-color: var(--pure-black);
}

.contact {
    background-color: var(--dark-gray);
}

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

.section-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.project-card {
    background-color: var(--medium-gray);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--light-gray);
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
}

.project-card:hover {
    border-color: var(--primary-yellow);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--primary-yellow);
    color: var(--pure-black);
    border-radius: 50%;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.project-link:hover {
    transform: scale(1.1);
    background-color: var(--highlight-yellow);
}

.project-content {
    padding: var(--spacing-lg);
}

.project-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-normal);
}

.project-card:hover .project-title {
    color: var(--primary-yellow);
}

.project-description {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.highlight-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(255, 215, 0, 0.2);
    color: var(--primary-yellow);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.project-tech h4 {
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tag {
    padding: var(--spacing-xs);
    background-color: var(--light-gray);
    color: var(--text-gray);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    transition: all var(--transition-normal);
}

.tech-tag:hover {
    background-color: var(--primary-yellow);
    color: var(--pure-black);
    border-color: var(--primary-yellow);
}

/* Resume Section */
.download-cv {
    margin-top: var(--spacing-md);
}

.resume-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.resume-section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.875rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.resume-section-title svg {
    color: var(--primary-yellow);
}

.experience-item {
    background-color: var(--medium-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--light-gray);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
}

.experience-item:hover {
    border-color: var(--primary-yellow);
    transform: translateY(-2px);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.experience-title h4 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.company {
    color: var(--primary-yellow);
    font-weight: var(--font-weight-medium);
}

.period {
    color: var(--text-gray);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
}

.experience-description {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Skills Section */
.skills-section {
    margin-top: var(--spacing-xxl);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category {
    background-color: var(--medium-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--light-gray);
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
}

.skill-category:hover {
    border-color: var(--primary-yellow);
    transform: translateY(-2px);
}

.skill-category h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-yellow);
    margin-bottom: var(--spacing-md);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--light-gray);
    color: var(--text-gray);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.skill-tag:hover {
    background-color: var(--primary-yellow);
    color: var(--pure-black);
    border-color: var(--primary-yellow);
    transform: translateY(-1px);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.contact-info,
.contact-cta {
    background-color: var(--medium-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--light-gray);
}

.contact-info h3,
.contact-cta h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    background-color: rgba(255, 215, 0, 0.1);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: rgba(255, 215, 0, 0.2);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.contact-item:hover .contact-icon {
    background-color: var(--primary-yellow);
}

.contact-icon svg {
    color: var(--primary-yellow);
    transition: color var(--transition-normal);
}

.contact-item:hover .contact-icon svg {
    color: var(--pure-black);
}

.contact-label {
    font-size: 0.875rem;
    color: var(--text-gray);
    display: block;
}

.contact-value {
    color: var(--white);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.contact-value:hover {
    color: var(--primary-yellow);
}

/* Social Links */
.social-section {
    border-top: 1px solid var(--light-gray);
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.social-section h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-sm);
}

.social-link:hover {
    background-color: rgba(255, 215, 0, 0.1);
}

.social-link svg {
    color: var(--primary-yellow);
    transition: color var(--transition-normal);
}

.social-link:hover svg {
    color: var(--highlight-yellow);
}

.social-name {
    color: var(--white);
    font-weight: var(--font-weight-medium);
    display: block;
    transition: color var(--transition-normal);
}

.social-link:hover .social-name {
    color: var(--primary-yellow);
}

.social-handle {
    color: var(--text-gray);
    font-size: 0.875rem;
    display: block;
}

/* Contact CTA */
.cta-content {
    margin-bottom: var(--spacing-xl);
}

.cta-card {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.cta-card:first-child {
    background-color: rgba(255, 215, 0, 0.1);
}

.cta-card h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

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

.cta-card ul {
    color: var(--text-gray);
    padding-left: var(--spacing-md);
}

.cta-card li {
    margin-bottom: var(--spacing-xs);
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.response-time {
    font-size: 0.875rem;
    color: var(--text-gray);
    text-align: center;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--light-gray);
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.site-footer p {
    color: var(--text-gray);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xl);
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu.active ~ .nav-toggle .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-menu.active ~ .nav-toggle .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-menu.active ~ .nav-toggle .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .resume-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .period {
        align-self: flex-end;
    }
    
    .cta-buttons {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 2.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .profile-photo img {
        width: 150px;
        height: 150px;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .project-card {
        min-width: unset;
    }
    
    .resume-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .contact-info,
    .contact-cta {
        padding: var(--spacing-lg);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-yellow: #FFFF00;
        --text-gray: #FFFFFF;
        --light-gray: #808080;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-yellow);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    .navbar,
    .hero-buttons,
    .scroll-indicator,
    .project-links,
    .cta-buttons {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: black !important;
        page-break-after: avoid;
    }
    
    .section-title {
        font-size: 18pt;
    }
    
    .project-card,
    .experience-item,
    .skill-category {
        page-break-inside: avoid;
        border: 1px solid #000 !important;
    }
}