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

:root {
    /* Color Palette */
    --js-primary-color: #f7df1e;
    --js-primary-dark: #d4c218;
    --js-secondary-color: #323330;
    --js-accent-color: #4a9eff;
    --js-text-primary: #2c2c2c;
    --js-text-secondary: #666;
    --js-text-light: #999;
    --js-bg-primary: #ffffff;
    --js-bg-secondary: #f8f9fa;
    --js-bg-dark: #1a1a1a;
    --js-border-color: #e1e5e9;
    --js-shadow-light: rgba(0, 0, 0, 0.1);
    --js-shadow-medium: rgba(0, 0, 0, 0.15);
    --js-shadow-heavy: rgba(0, 0, 0, 0.25);
    
    /* Typography */
    --js-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --js-font-size-xs: 0.75rem;
    --js-font-size-sm: 0.875rem;
    --js-font-size-base: 1rem;
    --js-font-size-lg: 1.125rem;
    --js-font-size-xl: 1.25rem;
    --js-font-size-2xl: 1.5rem;
    --js-font-size-3xl: 1.875rem;
    --js-font-size-4xl: 2.25rem;
    
    /* Spacing */
    --js-spacing-xs: 0.25rem;
    --js-spacing-sm: 0.5rem;
    --js-spacing-md: 1rem;
    --js-spacing-lg: 1.5rem;
    --js-spacing-xl: 2rem;
    --js-spacing-2xl: 3rem;
    --js-spacing-3xl: 4rem;
    
    /* Layout */
    --js-container-max-width: 1200px;
    --js-sidebar-width: 320px;
    --js-border-radius: 8px;
    --js-border-radius-lg: 12px;
    --js-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--js-font-family);
    font-size: var(--js-font-size-base);
    line-height: 1.6;
    color: var(--js-text-primary);
    background-color: var(--js-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}



.website-title {
    font-size: var(--js-font-size-3xl);
    font-weight: 700;
    color: var(--js-bg-primary);
    text-decoration: none;
    background: linear-gradient(45deg, var(--js-primary-color), var(--js-accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.website-author {
    font-size: var(--js-font-size-lg);
    color: var(--js-bg-primary);
    font-weight: 400;
    transition: var(--js-transition);
}

.nav-right a {
    text-decoration: none;
    color: inherit;
}

.nav-right a:hover .website-author {
    color: var(--js-primary-color);
    transform: translateY(-2px);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--js-bg-primary);
    border-radius: 2px;
    transition: var(--js-transition);
}

/* ===== MAIN LAYOUT ===== */
.container {
    max-width: var(--js-container-max-width);
    margin: 0 auto;
    padding: var(--js-spacing-xl) var(--js-spacing-md);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--js-spacing-3xl);
    align-items: start;
}

.content {
    min-width: 0; /* Prevent grid overflow */
}

.js-page-header-content {
    display: flex;
    align-items: center;
    gap: var(--js-spacing-md);
    justify-content: center;
}

.js-page-logo {
    width: 60px;
    height: 60px;
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--js-bg-secondary) 0%, rgba(247, 223, 30, 0.1) 100%);
    border-radius: var(--js-border-radius-lg);
    padding: var(--js-spacing-3xl);
    margin-bottom: var(--js-spacing-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(247, 223, 30, 0.05) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

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

.hero-title {
    font-size: var(--js-font-size-4xl);
    font-weight: 700;
    color: var(--js-text-primary);
    margin-bottom: var(--js-spacing-md);
    line-height: 1.2;
}

.hero-description {
    font-size: var(--js-font-size-lg);
    color: var(--js-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--js-spacing-2xl);
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--js-spacing-2xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--js-font-size-3xl);
    font-weight: 700;
    color: var(--js-primary-color);
    text-shadow: 2px 2px 4px var(--js-shadow-light);
}

.stat-label {
    font-size: var(--js-font-size-sm);
    color: var(--js-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== SECTIONS ===== */
.section-title {
    font-size: var(--js-font-size-2xl);
    font-weight: 600;
    color: var(--js-text-primary);
    margin-bottom: var(--js-spacing-xl);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--js-primary-color), var(--js-accent-color));
    border-radius: 2px;
}

/* ===== PROJECT GRID ===== */
.projects {
    margin-bottom: var(--js-spacing-3xl);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--js-spacing-xl);
}

.project-card {
    background: var(--js-bg-primary);
    border-radius: var(--js-border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--js-shadow-light);
    transition: var(--js-transition);
    position: relative;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--js-shadow-medium);
}

.project-card.featured {
    position: relative;
}

.project-card.featured::before {
    content: '⭐';
    position: absolute;
    top: var(--js-spacing-md);
    right: var(--js-spacing-md);
    z-index: 10;
    font-size: var(--js-font-size-lg);
}

.project-card a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--js-transition);
}

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

.project-demo {
    color: var(--js-bg-primary);
    font-weight: 600;
    font-size: var(--js-font-size-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.project-title {
    font-size: var(--js-font-size-lg);
    font-weight: 600;
    color: var(--js-text-primary);
    margin-bottom: var(--js-spacing-sm);
}

.project-desc {
    color: var(--js-text-secondary);
    font-size: var(--js-font-size-sm);
    margin-bottom: var(--js-spacing-md);
}

.project-badge {
    display: inline-block;
    background: var(--js-primary-color);
    color: var(--js-text-primary);
    padding: var(--js-spacing-xs) var(--js-spacing-sm);
    border-radius: var(--js-border-radius);
    font-size: var(--js-font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: sticky;
    top: calc(var(--js-spacing-3xl) + 80px); /* Account for navbar height */
}

.sidebar-content {
    background: var(--js-bg-primary);
    border-radius: var(--js-border-radius-lg);
    padding: var(--js-spacing-xl);
    box-shadow: 0 4px 20px var(--js-shadow-light);
    border: 1px solid var(--js-border-color);
    display: grid;
    grid-template-columns: 1fr 4fr;
    gap: var(--js-spacing-xl);
    align-items: start;
}

.sidebar-left {
    display: flex;
    flex-direction: column;
    gap: var(--js-spacing-lg);
}

.sidebar-right {
    display: flex;
    flex-direction: column;
}

.sidebar h3,
.sidebar h4 {
    color: var(--js-text-primary);
    margin-bottom: var(--js-spacing-md);
    font-weight: 600;
}

.sidebar h3 {
    font-size: var(--js-font-size-lg);
    border-bottom: 2px solid var(--js-border-color);
    padding-bottom: var(--js-spacing-sm);
}

.sidebar h4 {
    font-size: var(--js-font-size-base);
    margin-top: 0;
}

.topic-nav {
    display: flex;
    flex-direction: column;
    gap: var(--js-spacing-sm);
    margin-bottom: 0;
}

.topic-nav a {
    display: flex;
    align-items: center;
    gap: var(--js-spacing-sm);
    padding: var(--js-spacing-sm) var(--js-spacing-md);
    border-radius: var(--js-border-radius);
    text-decoration: none;
    color: var(--js-text-secondary);
    transition: var(--js-transition);
    border: 1px solid transparent;
}

.topic-nav a:hover {
    background-color: var(--js-bg-secondary);
    color: var(--js-text-primary);
    border-color: var(--js-border-color);
    transform: translateX(4px);
}

.topic-icon {
    font-size: var(--js-font-size-lg);
}

.topic-text {
    font-size: var(--js-font-size-sm);
    font-weight: 500;
}

/* Progress Bars */
.progress-section {
    margin-bottom: 0;
}

.progress-item {
    margin-bottom: var(--js-spacing-md);
}

.progress-label {
    display: block;
    font-size: var(--js-font-size-sm);
    color: var(--js-text-secondary);
    margin-bottom: var(--js-spacing-xs);
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--js-bg-secondary);
    border-radius: var(--js-border-radius);
    overflow: hidden;
    margin-bottom: var(--js-spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--js-primary-color), var(--js-accent-color));
    border-radius: var(--js-border-radius);
    transition: width 0.8s ease-out;
}

.progress-item:nth-child(2) .progress-fill { width: 85%; }
.progress-item:nth-child(3) .progress-fill { width: 75%; }
.progress-item:nth-child(4) .progress-fill { width: 60%; }
.progress-item:nth-child(5) .progress-fill { width: 40%; }
.progress-item:nth-child(6) .progress-fill { width: 25%; }

.progress-percent {
    font-size: var(--js-font-size-xs);
    color: var(--js-text-light);
    font-weight: 600;
}

/* Quick Links */
.quick-links {
    display: flex;
    flex-direction: column;
    gap: var(--js-spacing-sm);
}

.quick-link {
    display: block;
    padding: var(--js-spacing-sm) var(--js-spacing-md);
    background-color: var(--js-bg-secondary);
    border-radius: var(--js-border-radius);
    text-decoration: none;
    color: var(--js-text-secondary);
    font-size: var(--js-font-size-sm);
    font-weight: 500;
    transition: var(--js-transition);
    border: 1px solid var(--js-border-color);
}

.quick-link:hover {
    background-color: var(--js-primary-color);
    color: var(--js-text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--js-shadow-light);
}

/* ===== ABOUT SECTION ===== */
.about-section {
    background: var(--js-bg-secondary);
    border-radius: var(--js-border-radius-lg);
    padding: var(--js-spacing-2xl);
    margin-bottom: var(--js-spacing-2xl);
}

.about-content {
    max-width: 100%;
}

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

.badges img {
    height: 28px;
    transition: var(--js-transition);
}

.badges a:hover img {
    transform: scale(1.1);
}

.about-project {
    color: var(--js-text-secondary);
    line-height: 1.7;
}

.about-project h2 {
    color: var(--js-text-primary);
    margin: var(--js-spacing-xl) 0 var(--js-spacing-md);
    font-size: var(--js-font-size-xl);
    font-weight: 600;
}

.about-project ul {
    margin: var(--js-spacing-md) 0;
    padding-left: var(--js-spacing-lg);
}

.about-project li {
    margin-bottom: var(--js-spacing-sm);
}

.about-project strong {
    color: var(--js-text-primary);
}

.about-project a {
    color: var(--js-accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--js-transition);
}

.about-project a:hover {
    border-bottom-color: var(--js-accent-color);
}

pre {
    background-color: var(--js-bg-dark);
    border-radius: var(--js-border-radius);
    padding: var(--js-spacing-lg);
    overflow-x: auto;
    margin: var(--js-spacing-md) 0;
    border: 1px solid var(--js-border-color);
}

code {
    color: var(--js-bg-primary);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    font-size: var(--js-font-size-sm);
}

hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--js-border-color), transparent);
    margin: var(--js-spacing-xl) 0;
}

/* ===== FOOTER ===== */
footer {
    text-align: center;
    padding: var(--js-spacing-2xl) var(--js-spacing-md);
    color: var(--js-text-light);
    font-size: var(--js-font-size-sm);
    border-top: 1px solid var(--js-border-color);
    margin-top: var(--js-spacing-3xl);
}

a {
    text-decoration: none;
    color: inherit;
}

p {
    padding: 0;
    margin: 0;
    text-align: justify;
}

footer p {
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--js-spacing-lg);
    margin-bottom: var(--js-spacing-xl);
}

footer a {
    font-size: x-large;
}

footer a:hover {
    color: var(--js-accent-color);
    transform: translateY(-2px);
}

/* ===== RESPONSIVE DESIGN ===== */

/* Large screens (desktops) */
@media (min-width: 1400px) {
    :root {
        --js-container-max-width: 1400px;
        --js-sidebar-width: 380px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Medium screens (tablets) */
@media (max-width: 1024px) {
    :root {
        --js-sidebar-width: 280px;
        --js-spacing-3xl: 3rem;
    }
    
    .main-content {
        gap: var(--js-spacing-2xl);
    }
    
    .hero {
        padding: var(--js-spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--js-font-size-3xl);
    }
    
    .hero-stats {
        gap: var(--js-spacing-xl);
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--js-spacing-lg);
    }
}

/* Small screens (mobile landscape) */
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: var(--js-spacing-xl);
    }
    
    .sidebar {
        order: -1;
        position: static;
    }
    
    .sidebar-content {
        padding: var(--js-spacing-lg);
        grid-template-columns: 1fr;
        gap: var(--js-spacing-lg);
    }
    
    .progress-section {
        order: -1; /* Move progress to top on mobile */
    }
    
    .hero {
        padding: var(--js-spacing-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--js-font-size-2xl);
    }
    
    .hero-description {
        font-size: var(--js-font-size-base);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--js-spacing-md);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar {
        padding: var(--js-spacing-md);
    }
    
    .logo {
        width: 50px;
        height: 50px;
    }
    
    .website-title {
        font-size: var(--js-font-size-2xl);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* Extra small screens (mobile portrait) */
@media (max-width: 480px) {
    :root {
        --js-spacing-md: 0.75rem;
        --js-spacing-lg: 1rem;
        --js-spacing-xl: 1.5rem;
        --js-spacing-2xl: 2rem;
        --js-spacing-3xl: 2.5rem;
    }
    
    .container {
        padding: var(--js-spacing-md);
    }
    
    .nav-left {
        gap: var(--js-spacing-md);
    }
    
    .nav-right {
        margin-left: var(--js-spacing-md);
    }
    
    .website-title {
        font-size: var(--js-font-size-xl);
    }
    
    .hero {
        padding: var(--js-spacing-lg);
    }
    
    .hero-title {
        font-size: var(--js-font-size-xl);
        line-height: 1.3;
    }
    
    .stat-number {
        font-size: var(--js-font-size-2xl);
    }
    
    .project-info {
        padding: var(--js-spacing-md);
    }
    
    .sidebar-content {
        padding: var(--js-spacing-md);
        grid-template-columns: 1fr;
        gap: var(--js-spacing-md);
    }
    
    .about-section {
        padding: var(--js-spacing-lg);
    }
    
    .badges {
        gap: var(--js-spacing-xs);
    }
    
    .badges img {
        height: 24px;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --js-shadow-light: rgba(0, 0, 0, 0.3);
        --js-shadow-medium: rgba(0, 0, 0, 0.4);
        --js-border-color: #000;
    }
}

/* ===== ANIMATIONS ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.animate-progress .progress-fill {
    animation: progressFill 1.2s ease-out;
}

@keyframes progressFill {
    from { width: 0 !important; }
}

.stat {
    transition: transform 0.2s ease;
}

/* Mobile menu styles */
@media (max-width: 768px) {
    .sidebar.mobile-open {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.9);
        z-index: 1000;
        padding: var(--js-spacing-2xl) var(--js-spacing-md);
        overflow-y: auto;
    }
    
    .sidebar.mobile-open .sidebar-content {
        background: var(--js-bg-primary);
        margin-top: 60px;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* Focus styles for accessibility */
.project-card a:focus,
.topic-nav a:focus,
.quick-link:focus {
    outline: 3px solid var(--js-primary-color);
    outline-offset: 2px;
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--js-primary-color);
    outline-offset: 4px;
}

/* Enhanced hover effects */
.topic-nav a:hover .topic-icon {
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* Loading states */
.project-card.loading .project-overlay {
    opacity: 1;
    background: rgba(247, 223, 30, 0.9);
}

.project-card.loading .project-demo {
    color: var(--js-text-primary);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .hero::before {
        animation: none;
    }
    
    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}