:root {
    /* Silver/Metallic Color Palette - matching homepage */
    --primary-color: #ffffff;
    --secondary-color: rgba(20, 20, 25, 0.95);
    --accent-color: #71717a;
    --accent-hover: #a1a1aa;
    --accent-secondary: #52525b;
    --accent-tertiary: #3f3f46;
    --text-color: #f3f4f6;
    --text-muted: #9ca3af;
    --background-gradient: radial-gradient(ellipse at center, #000814 0%, #0a0a0f 40%, #000000 100%);
    
    /* Card styles with metallic theme */
    --card-background: linear-gradient(160deg, rgba(30, 30, 35, 0.8) 0%, rgba(20, 20, 25, 0.9) 100%);
    --card-hover: linear-gradient(160deg, rgba(40, 40, 45, 0.9) 0%, rgba(30, 30, 35, 0.95) 100%);
    --card-expanded: linear-gradient(160deg, rgba(35, 35, 40, 0.95) 0%, rgba(25, 25, 30, 0.98) 100%);
    --card-glow: 0 0 20px rgba(113, 113, 122, 0.1);
    --card-glow-hover: 0 0 30px rgba(161, 161, 170, 0.2);
    --card-border: 1px solid rgba(113, 113, 122, 0.2);
    --card-border-hover: 1px solid rgba(161, 161, 170, 0.4);
    
    /* Consistent design tokens */
    --transition-speed: 0.4s;
    --transition-curve: cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
    --border-radius-large: 16px;
    --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --box-shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.4);
    --backdrop-blur: blur(20px);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background: 
        radial-gradient(ellipse at top left, rgba(113, 113, 122, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(161, 161, 170, 0.1) 0%, transparent 50%),
        var(--background-gradient);
    background-attachment: fixed;
    background-size: cover;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-color);
    min-height: 100vh;
    box-sizing: border-box;
    line-height: 1.6;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    box-sizing: border-box;
    container-type: inline-size;
}

.project-card {
    background: var(--card-background);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: var(--box-shadow);
    cursor: pointer;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: 
        transform var(--transition-speed) var(--transition-curve),
        box-shadow var(--transition-speed) var(--transition-curve),
        background var(--transition-speed) var(--transition-curve),
        border-color var(--transition-speed) var(--transition-curve);
    border: var(--card-border);
    isolation: isolate;
}

/* Metallic shimmer effect */
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(212, 212, 216, 0.1), 
        transparent);
    transition: left 0.6s ease;
}

.project-card:not(.expanded):hover::before {
    left: 100%;
}

/* Subtle glow effect */
.project-card::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: radial-gradient(circle at center, var(--accent-color) 0%, transparent 70%);
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-speed) var(--transition-curve);
    z-index: -1;
    filter: blur(8px);
}

.project-card:not(.expanded):hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--box-shadow-hover);
    background: var(--card-hover);
    border-color: rgba(161, 161, 170, 0.4);
}

.project-card:not(.expanded):hover::after {
    opacity: 0.05;
}

/* Focus states for accessibility */
.project-card:focus-visible {
    outline: 2px solid var(--accent-hover);
    outline-offset: 4px;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

.project-card.expanded {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(90vw, 1000px);
    height: min(85vh, 800px);
    max-height: 85vh;
    z-index: 1001;
    background: var(--card-expanded);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: var(--card-border-hover);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
    border-radius: var(--border-radius-large);
    animation: slideInUp 0.5s var(--transition-curve);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Modal structure */
.project-card.expanded .modal-header {
    flex-shrink: 0;
    padding: var(--spacing-xl);
    border-bottom: 1px solid rgba(113, 113, 122, 0.3);
}

.project-card.expanded .modal-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
    min-height: 0;
}

/* Custom scrollbar for expanded cards */
.project-card.expanded .modal-content::-webkit-scrollbar {
    width: 8px;
}

.project-card.expanded .modal-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.project-card.expanded .modal-content::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 4px;
    transition: background var(--transition-speed);
}

.project-card.expanded .modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* Only hide main image if a non-empty gallery exists */
.project-card.expanded:has(.image-gallery img) .project-image {
    display: none;
}

.project-image {
    width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-speed) var(--transition-curve);
    filter: brightness(0.95);
}

.project-image:hover {
    transform: scale(1.05);
    filter: brightness(1);
}

.image-gallery {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.project-card.expanded .image-gallery {
    display: grid;
}

.project-card.expanded .image-gallery img {
    width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: var(--border-radius);
    transition: transform var(--transition-speed) var(--transition-curve);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.project-card.expanded .image-gallery img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.project-card h2 {
    color: var(--primary-color);
    margin: 0 0 var(--spacing-lg) 0;
    text-align: center;
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.project-description {
    max-width: 100%;
    height: 0;
    opacity: 0;
    overflow: hidden;
    transition: opacity var(--transition-speed) var(--transition-curve);
}

.project-card.expanded .project-description {
    height: auto;
    opacity: 1;
    overflow: visible;
    animation: fadeInUp 0.6s var(--transition-curve) 0.2s both;
}

/* Compact modal styles */
.project-card.expanded h2 {
    margin-bottom: var(--spacing-md);
    font-size: clamp(1.3rem, 3vw, 1.6rem);
}

.project-card.expanded .project-image {
    max-height: 180px;
    margin-bottom: var(--spacing-sm);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-description p {
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    font-size: 1.05rem;
}

.project-description ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.project-description ul li {
    position: relative;
    padding: var(--spacing-xs) 0 var(--spacing-xs) var(--spacing-xl);
    margin: 0;
    border-left: 2px solid transparent;
    border-radius: 0 4px 4px 0;
    transition: 
        border-color var(--transition-speed) var(--transition-curve),
        background-color var(--transition-speed) var(--transition-curve),
        transform var(--transition-speed) var(--transition-curve);
}

.project-description ul li:hover {
    border-left-color: var(--accent-hover);
    background: linear-gradient(90deg, rgba(161, 161, 170, 0.08) 0%, transparent 100%);
    transform: translateX(4px);
}

.project-description ul li::before {
    content: "▸";
    position: absolute;
    left: var(--spacing-xs);
    top: var(--spacing-xs);
    color: var(--accent-hover);
    font-weight: bold;
    font-size: 1.1em;
    transition: transform var(--transition-speed) var(--transition-curve);
}

.project-description ul li:hover::before {
    transform: translateX(2px);
}

.project-description strong {
    color: var(--primary-color);
    font-weight: 700;
}

.project-description em {
    color: var(--text-muted);
    font-style: italic;
    font-weight: 400;
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.95em;
}

.project-description a {
    color: var(--accent-hover);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: color var(--transition-speed) var(--transition-curve);
}

.project-description a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-hover);
    transition: width var(--transition-speed) var(--transition-curve);
}

.project-description a:hover {
    color: var(--primary-color);
}

.project-description a:hover::after {
    width: 100%;
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    cursor: pointer;
    transition: opacity var(--transition-speed) var(--transition-curve);
    opacity: 0;
}

.overlay.active {
    display: block;
    opacity: 1;
    animation: fadeIn 0.3s var(--transition-curve);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}


footer {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(180deg, transparent, rgba(20, 20, 25, 0.8));
    backdrop-filter: blur(10px);
    margin-top: var(--spacing-2xl);
}

footer .social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

footer .social-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(113, 113, 122, 0.3);
    background: rgba(30, 30, 35, 0.6);
    backdrop-filter: blur(10px);
    transition: all var(--transition-speed) var(--transition-curve);
    position: relative;
    overflow: hidden;
}

footer .social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 212, 216, 0.1), transparent);
    transition: left 0.6s ease;
}

footer .social-links a:hover::before {
    left: 100%;
}

footer .social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(113, 113, 122, 0.2);
    background: rgba(63, 63, 70, 0.8);
    border-color: rgba(161, 161, 170, 0.5);
}

/* Responsive design */
@media (max-width: 768px) {
    header nav {
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .projects-container {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
    }
    
    .project-card {
        padding: var(--spacing-lg);
    }
    
    .project-card.expanded {
        width: 95vw;
        height: min(90vh, 700px);
        max-height: 90vh;
    }
    
    .project-card.expanded .modal-header {
        padding: var(--spacing-lg);
    }
    
    .project-card.expanded .modal-content {
        padding: var(--spacing-lg);
    }
    
    .project-card.expanded .project-image {
        max-height: 140px;
    }
    
    .project-card h2 {
        font-size: 1.4rem;
    }
    
    footer .social-links {
        gap: var(--spacing-sm);
    }
}

@media (min-width: 1200px) {
    .projects-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1600px) {
    .projects-container {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --card-border: 2px solid var(--accent-color);
        --text-color: #ffffff;
        --text-muted: #cccccc;
    }
}