/* ===================================
   3D Artist Portfolio - Premium Dark Theme
   =================================== */

/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --primary-color: #00d4ff;
    --secondary-color: #ff006e;
    --accent-color: #00d4ff;
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: #13131a;
    --bg-card-hover: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #b4b4c8;
    --text-muted: #6e6e8a;
    --border-color: #1f1f2e;
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --gradient-2: linear-gradient(135deg, #ff006e 0%, #ff4d00 100%);
    --gradient-3: linear-gradient(135deg, #00d4ff 0%, #ff006e 100%);
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Orbitron', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

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

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

.section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.section-title {
    margin-bottom: 15px;
    background: var(--gradient-3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-1);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-description {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: var(--transition-normal);
    z-index: -1;
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-small {
    padding: 10px 20px;
    font-size: 0.9rem;
}

/* ===================================
   Loading Screen
   =================================== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-darker);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.cube {
    width: 60px;
    height: 60px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 2s infinite linear;
    margin: 0 auto 20px;
}

.face {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    opacity: 0.8;
    border: 2px solid var(--accent-color);
}

.front  { transform: rotateY(0deg) translateZ(30px); }
.back   { transform: rotateY(180deg) translateZ(30px); }
.right  { transform: rotateY(90deg) translateZ(30px); }
.left   { transform: rotateY(-90deg) translateZ(30px); }
.top    { transform: rotateX(90deg) translateZ(30px); }
.bottom { transform: rotateX(-90deg) translateZ(30px); }

@keyframes rotateCube {
    from { transform: rotateX(0deg) rotateY(0deg); }
    to { transform: rotateX(360deg) rotateY(360deg); }
}

.loader p {
    color: var(--accent-color);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    z-index: 1000;
    transition: var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 15px 0;
    background: rgba(10, 10, 15, 0.98);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
}

.logo-text .accent {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#hero-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

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

.hero-text {
    margin-bottom: 60px;
}

.greeting {
    display: block;
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--accent-color);
    margin-bottom: 10px;
    animation: fadeInUp 0.8s ease;
}

.name {
    display: block;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 900;
    margin-bottom: 15px;
    background: var(--gradient-3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 1s backwards;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--bg-darker);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-slow);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0.2;
    transition: var(--transition-normal);
}

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

.image-wrapper:hover .image-overlay {
    opacity: 0.1;
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 120px;
    height: 120px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.badge-number {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
}

.badge-text {
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
    line-height: 1.2;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    margin-bottom: 20px;
}

.about-highlights {
    display: grid;
    gap: 20px;
    margin-top: 30px;
}

.highlight-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
    transition: var(--transition-normal);
}

.highlight-item:hover {
    background: var(--bg-card-hover);
    transform: translateX(5px);
}

.highlight-item i {
    font-size: 2rem;
    color: var(--accent-color);
    min-width: 40px;
}

.highlight-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.highlight-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.skill-category {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.category-icon i {
    font-size: 1.8rem;
    color: var(--text-primary);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-name {
    font-weight: 600;
    color: var(--text-primary);
}

.skill-level {
    font-size: 0.85rem;
    color: var(--accent-color);
}

.skill-bar {
    height: 8px;
    background: var(--bg-darker);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 4px;
    width: 0;
    transition: width 1s ease;
}

/* ===================================
   Portfolio Section
   =================================== */
.portfolio {
    background: var(--bg-darker);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 50px;
}

.filter-btn {
    padding: 10px 25px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-1);
    color: var(--text-primary);
    border-color: transparent;
    transform: translateY(-2px);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.portfolio-item {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    opacity: 1;
    transform: scale(1);
}

.portfolio-item.hide {
    opacity: 0;
    transform: scale(0.8);
    position: absolute;
    pointer-events: none;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

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

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

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    padding: 20px;
    transform: translateY(20px);
    transition: var(--transition-normal);
}

.portfolio-item:hover .overlay-content {
    transform: translateY(0);
}

.overlay-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.overlay-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.portfolio-info {
    padding: 20px;
}

.project-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.portfolio-info h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* ===================================
   3D Viewer Section
   =================================== */
.viewer-section {
    background: var(--bg-dark);
}

.viewer-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: start;
}

.model-viewer {
    position: relative;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    aspect-ratio: 16/10;
}

#threejs-viewer {
    width: 100%;
    height: 100%;
}

.viewer-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 10;
}

.control-btn {
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.viewer-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.viewer-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 5px 0;
}

.viewer-info i {
    color: var(--accent-color);
    margin-right: 8px;
}

.model-selector h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.model-thumbnails {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.model-thumb {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-normal);
}

.model-thumb:hover,
.model-thumb.active {
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
}

.model-thumb img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
}

.model-thumb span {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    background: var(--bg-darker);
}

.experience-content {
    max-width: 900px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    padding-left: 50px;
    margin-bottom: 60px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--gradient-1);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-dot {
    position: absolute;
    left: -56px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border: 4px solid var(--bg-darker);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-card);
}

.timeline-date {
    display: inline-block;
    padding: 5px 15px;
    background: var(--gradient-1);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 15px;
}

.timeline-content {
    background: var(--bg-card);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--accent-color);
    transform: translateX(5px);
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.timeline-content h4 {
    font-size: 1.1rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.timeline-content p {
    margin-bottom: 15px;
}

.experience-highlights {
    list-style: none;
    margin: 15px 0;
}

.experience-highlights li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.experience-highlights li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 1.2rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.tech-tags span {
    padding: 5px 12px;
    background: var(--bg-darker);
    color: var(--accent-color);
    font-size: 0.8rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.clients-section {
    text-align: center;
}

.clients-section h3 {
    font-size: 1.8rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    align-items: center;
}

.client-logo {
    padding: 20px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.client-logo:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.client-logo img {
    max-width: 100%;
    height: auto;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: var(--transition-normal);
}

.client-logo:hover img {
    opacity: 1;
    filter: grayscale(0%);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--bg-dark);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.contact-info > p {
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.3rem;
    color: var(--text-primary);
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.contact-item p,
.contact-item a {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-item a:hover {
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--gradient-1);
    color: var(--text-primary);
    border-color: transparent;
    transform: translateY(-3px);
}

.contact-form {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.error-message {
    display: block;
    color: var(--secondary-color);
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
}

.form-group.error input,
.form-group.error textarea {
    border-color: var(--secondary-color);
}

.form-group.error .error-message {
    display: block;
}

.btn-submit {
    width: 100%;
    margin-top: 10px;
}

.form-status {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-status.success {
    background: rgba(0, 212, 100, 0.1);
    border: 1px solid rgba(0, 212, 100, 0.3);
    color: #00d464;
    display: block;
}

.form-status.error {
    background: rgba(255, 0, 110, 0.1);
    border: 1px solid rgba(255, 0, 110, 0.3);
    color: var(--secondary-color);
    display: block;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.footer-col h3 .accent {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.footer-social a:hover {
    background: var(--gradient-1);
    color: var(--text-primary);
    border-color: transparent;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-normal);
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-contact i {
    color: var(--accent-color);
    margin-top: 3px;
}

.footer-contact a {
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.footer-contact a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: var(--transition-normal);
}

.footer-bottom-links a:hover {
    color: var(--accent-color);
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border: none;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

/* ===================================
   Modal
   =================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

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

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    max-width: 1000px;
    width: 100%;
    position: relative;
    border: 1px solid var(--border-color);
    animation: slideUp 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    z-index: 10;
}

.modal-close:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

.modal-body {
    padding: 40px;
}

.modal-header h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.modal-header .project-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.meta-item i {
    color: var(--accent-color);
}

.modal-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.modal-gallery img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Video in modal */
.modal-video {
    grid-column: 1 / -1;
    width: 100%;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-video video {
    width: 100%;
    max-width: 100%;
    max-height: 400px;
    height: auto;
    border-radius: 12px;
    border: 2px solid var(--accent-color);
    background: #000;
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
    object-fit: contain;
    display: block;
}

.project-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.detail-item {
    background: var(--bg-darker);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.detail-item h4 {
    font-size: 0.9rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.detail-item p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
}

/* ===================================
   Lazy Loading
   =================================== */
.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 992px) {
    :root {
        --section-padding: 80px 0;
    }

    .container {
        padding: 0 30px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 70px);
        background: var(--bg-card);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transition: var(--transition-normal);
        border-left: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

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

    .hero-stats {
        gap: 40px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .experience-badge {
        bottom: 20px;
        right: 20px;
        width: 100px;
        height: 100px;
    }

    .badge-number {
        font-size: 1.8rem;
    }

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

    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

    .viewer-container {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .container {
        padding: 0 20px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .hero {
        min-height: 90vh;
        padding-top: 100px;
    }

    .hero-text {
        margin-bottom: 40px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }

    .experience-badge {
        width: 90px;
        height: 90px;
        bottom: 10px;
        right: 10px;
    }

    .badge-number {
        font-size: 1.5rem;
    }

    .badge-text {
        font-size: 0.7rem;
    }

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

    .portfolio-filters {
        gap: 10px;
    }

    .filter-btn {
        padding: 8px 18px;
        font-size: 0.85rem;
    }

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

    .timeline {
        padding-left: 30px;
    }

    .timeline-dot {
        left: -38px;
    }

    .project-details {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .modal-body {
        padding: 30px 20px;
    }

    .modal-gallery {
        grid-template-columns: 1fr;
    }

    .modal-video video {
        max-height: 300px;
    }

    .wireframe-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .contact-form {
        padding: 25px;
    }

    .viewer-info {
        font-size: 0.75rem;
        padding: 10px 15px;
    }

    .model-thumb {
        flex-direction: column;
        text-align: center;
    }

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

    .play-btn {
        width: 50px;
        height: 50px;
        font-size: 16px;
    }

    .fullscreen-btn {
        width: 35px;
        height: 35px;
        font-size: 14px;
        top: 10px;
        right: 10px;
        opacity: 1; /* Always visible on mobile */
    }
}

/* ===================================
   Wireframe Showcase Section
   =================================== */
.wireframe-section {
    background: var(--bg-darker);
    position: relative;
    overflow: hidden;
}

.wireframe-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.wireframe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.wireframe-item {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
}

.wireframe-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
}

.wireframe-video-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #000;
    overflow: hidden;
}

.wireframe-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.wireframe-item:hover .video-overlay {
    opacity: 0;
}

.wireframe-video.playing + .video-overlay {
    opacity: 0;
}

.play-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-color);
    border: none;
    color: var(--bg-dark);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    pointer-events: all;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.8);
}

.play-btn i {
    margin-left: 3px; /* Center the play icon */
}

/* Fullscreen Button */
.fullscreen-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--accent-color);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    opacity: 0;
    z-index: 10;
}

.wireframe-item:hover .fullscreen-btn {
    opacity: 1;
}

.fullscreen-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-color);
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

.fullscreen-btn:active {
    transform: scale(0.95);
}

/* Fullscreen mode styles */
.wireframe-video-wrapper:fullscreen {
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wireframe-video-wrapper:fullscreen .wireframe-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.wireframe-video-wrapper:fullscreen .fullscreen-btn {
    opacity: 1;
}

.wireframe-video-wrapper:fullscreen .fullscreen-btn i::before {
    content: "\f066"; /* fa-compress icon */
}

/* Firefox fullscreen */
.wireframe-video-wrapper:-moz-full-screen {
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wireframe-video-wrapper:-moz-full-screen .wireframe-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Webkit fullscreen */
.wireframe-video-wrapper:-webkit-full-screen {
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wireframe-video-wrapper:-webkit-full-screen .wireframe-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.wireframe-info {
    padding: 20px;
}

.wireframe-info h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.wireframe-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .navbar,
    .back-to-top,
    .hero-background,
    .contact-form {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .section {
        page-break-inside: avoid;
    }
}