/* ============================================
   MAHDI NAVAEI - AI/ML ENGINEER PORTFOLIO
   Modern, Professional Design with Neural Network Aesthetics
   ============================================ */

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

/* ============================================
   CSS VARIABLES - Ocean Breeze + Cyber Theme
   ============================================ */
:root {
    /* Primary Colors - Ocean Breeze */
    --primary-cyan: #22d3ee;
    --primary-blue: #3b82f6;
    --primary-purple: #a855f7;
    --primary-pink: #f472b6;
    
    /* Accent Colors */
    --accent-green: #10b981;
    --accent-yellow: #fbbf24;
    --accent-orange: #f97316;
    --accent-red: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
    --gradient-accent: linear-gradient(135deg, var(--primary-purple), var(--primary-pink));
    --gradient-hero: linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #0f0f23 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
    
    /* Dark Theme Colors */
    --bg-dark: #0f0f23;
    --bg-darker: #0a0a1a;
    --bg-card: #1a1a3e;
    --bg-card-hover: #252550;
    
    /* Text Colors */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(34, 211, 238, 0.3);
    
    /* Borders */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-primary: 'Inter', 'Vazirmatn', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-persian: 'Vazirmatn', 'Inter', system-ui, sans-serif;
}

/* Light mode overrides */
.light-mode {
    --bg-dark: #f8fafc;
    --bg-darker: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --border-color: rgba(0, 0, 0, 0.1);
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-dark);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

[dir="rtl"] body {
    font-family: var(--font-persian);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 15, 35, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 15, 35, 0.95);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 24px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

[dir="rtl"] .nav-link::after { right: 0; }
[dir="ltr"] .nav-link::after { left: 0; }

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-toggle {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-size: 0.9rem;
}

.lang-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 5px;
    z-index: 1001;
}

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

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: var(--gradient-hero);
}

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

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 0 0 220px;
    position: relative;
}

.hero-image-wrapper {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-glow {
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.5;
    filter: blur(30px);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

.hero-profile-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--glass-border);
    position: relative;
    z-index: 2;
    transition: var(--transition);
}

.hero-image-ring {
    position: absolute;
    width: 230px;
    height: 230px;
    border-radius: 50%;
    border: 2px solid var(--primary-cyan);
    opacity: 0.5;
    animation: rotate-ring 20s linear infinite;
}

@keyframes rotate-ring {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.status-badge {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid var(--accent-green);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--accent-green);
    backdrop-filter: blur(10px);
    white-space: nowrap;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-text {
    flex: 1;
    min-width: 300px;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--primary-cyan);
    font-weight: 500;
    margin-bottom: 0.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.2s;
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.3s;
}

.hero-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-primary);
    min-height: 2.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.4s;
}

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

.typing-cursor {
    display: inline-block;
    animation: blink 1s infinite;
    color: var(--primary-cyan);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-subtitle {
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    max-width: 500px;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.5s;
}

.hero-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.6s;
}

.tech-pill {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.tech-pill:hover {
    background: rgba(34, 211, 238, 0.1);
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
    transform: translateY(-2px);
}

.tech-pill i {
    font-size: 0.9rem;
}

.hero-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    font-size: 1rem;
    color: var(--text-muted);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.7s;
}

.hero-location i {
    color: var(--primary-cyan);
}

.hero-social {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.8s;
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.2rem;
}

.social-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--bg-dark);
    transform: translateY(-4px) scale(1.1);
    box-shadow: var(--shadow-glow);
}

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(20px);
}

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

.stat-icon {
    font-size: 1.5rem;
    color: var(--primary-cyan);
    margin-bottom: 0.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.25rem;
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-title.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   FEATURED PROJECTS SECTION
   ============================================ */
.featured-section {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.featured-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.featured-card-large {
    grid-column: span 2;
}

.featured-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    opacity: 0;
    transition: var(--transition);
}

.featured-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-cyan);
    box-shadow: var(--shadow-glow);
}

.featured-card:hover .featured-card-bg {
    opacity: 1;
}

.featured-card-content {
    position: relative;
    padding: 2rem;
    z-index: 1;
}

.featured-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.featured-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--bg-dark);
}

.featured-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: rgba(34, 211, 238, 0.15);
    color: var(--primary-cyan);
    border: 1px solid rgba(34, 211, 238, 0.3);
}

.badge-accent {
    background: rgba(168, 85, 247, 0.15);
    color: var(--primary-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.15);
    color: var(--accent-yellow);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary-blue);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.featured-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.featured-tagline {
    font-size: 1rem;
    color: var(--primary-cyan);
    font-family: var(--font-mono);
    margin-bottom: 1rem;
}

.featured-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.featured-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.featured-metrics {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.metric-highlight .metric-value {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.featured-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    transition: var(--transition);
}

.tech-tag:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

.featured-actions {
    display: flex;
    gap: 1rem;
}

/* Architecture Image */
.featured-architecture {
    margin: 1.5rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.architecture-image-wrapper {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
}

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

.architecture-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 15, 35, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.architecture-image-wrapper:hover .architecture-overlay {
    opacity: 1;
}

.architecture-image-wrapper:hover .architecture-img {
    transform: scale(1.02);
}

.view-architecture-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--bg-dark);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.view-architecture-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3);
}

/* Architecture Modal */
.architecture-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 2rem;
}

.architecture-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    max-width: 95vw;
    max-height: 95vh;
    animation: modalZoom 0.3s ease-out;
}

@keyframes modalZoom {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--glass-bg);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--primary-cyan);
    color: var(--bg-dark);
    transform: rotate(90deg);
}

.modal-img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: var(--border-radius);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
}

.modal-caption {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 1rem;
    font-size: 0.9rem;
}

.btn-featured {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.btn-github {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-github:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--bg-dark);
    transform: translateY(-2px);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.15rem;
    line-height: 1.9;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    text-align: justify;
}

/* ============================================
   SKILLS SECTION
   ============================================ */

/* Tech Stack Showcase */
.tech-stack-showcase {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 4rem;
    padding: 2rem;
    background: var(--glass-bg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
    min-height: 100px;
}

/* Ensure visibility for all animated elements */
.section-header,
.featured-card,
.project-card,
.timeline-item,
.skill-category,
.education-card,
.tech-icon-item,
.testimonial-card,
.contact-card,
.timeline-content,
.radar-chart-container {
    opacity: 1 !important;
    visibility: visible !important;
}

.tech-icon-item {
    width: 60px;
    height: 60px;
    min-width: 60px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    color: var(--text-secondary);
}

.tech-icon-item i,
.tech-icon-item svg {
    font-size: 1.75rem;
    width: 1.75rem;
    height: 1.75rem;
    min-width: 1.75rem;
    min-height: 1.75rem;
    transition: var(--transition);
    fill: currentColor;
}

.tech-icon-item:hover {
    transform: translateY(-8px) scale(1.1);
    border-color: var(--primary-cyan);
    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3);
    color: var(--primary-cyan);
}

.tech-icon-item::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-darker);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.tech-icon-item:hover::after {
    opacity: 1;
    visibility: visible;
    bottom: -40px;
}

/* Skills Main Layout */
.skills-main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 3rem;
    align-items: start;
}

/* Radar Chart Container */
.radar-chart-container {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: 2rem;
    position: sticky;
    top: 100px;
}

.radar-chart-container canvas {
    max-width: 100%;
    height: auto;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.skill-category-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.skill-category-title i {
    color: var(--primary-cyan);
}

.skill-progress {
    margin-bottom: 1.5rem;
}

.progress-item {
    margin-bottom: 1.25rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.progress-label {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

.progress-percent {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.progress-bar {
    height: 6px;
    background: var(--glass-bg);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0;
    transition: width 1s ease-out;
}

.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    padding: 0.6rem 0;
    position: relative;
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.skill-list li i {
    color: var(--primary-cyan);
    font-size: 0.9rem;
}

.skill-list li:hover {
    color: var(--text-primary);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.6rem 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.filter-btn:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    border-color: transparent;
}

.projects-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-cyan);
    box-shadow: var(--shadow-glow);
}

.project-thumbnail {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-hover) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-thumbnail::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.1;
}

.project-thumbnail-placeholder {
    font-size: 3.5rem;
    color: var(--primary-cyan);
    z-index: 1;
    transition: var(--transition);
}

.project-card:hover .project-thumbnail-placeholder {
    transform: scale(1.15);
}

.project-card .project-header,
.project-card .project-links,
.project-card .project-description,
.project-card .project-features {
    padding: 0 2rem;
}

.project-card .project-header {
    padding-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.project-card .project-features {
    padding-bottom: 2rem;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.project-year {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    padding: 0.35rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.project-links {
    margin-bottom: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-cyan);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--text-primary);
}

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

.project-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.project-features li i {
    color: var(--primary-cyan);
    margin-top: 0.25rem;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

[dir="rtl"] .timeline { padding-right: 2rem; }
[dir="ltr"] .timeline { padding-left: 2rem; }

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

[dir="rtl"] .timeline::before { right: 0; }
[dir="ltr"] .timeline::before { left: 0; }

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

[dir="rtl"] .timeline-item { padding-right: 4rem; }
[dir="ltr"] .timeline-item { padding-left: 4rem; }

.timeline-marker {
    position: absolute;
    top: 0;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--primary-cyan);
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

[dir="rtl"] .timeline-marker { right: -25px; }
[dir="ltr"] .timeline-marker { left: -25px; }

.company-logo {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 1.25rem;
}

.company-logo i {
    transition: var(--transition);
}

.timeline-item:hover .company-logo i {
    transform: scale(1.1);
    color: var(--primary-purple);
}

.timeline-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--primary-cyan);
    box-shadow: var(--shadow-glow);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-title-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-badge.current {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.timeline-badge.freelance {
    background: rgba(251, 191, 36, 0.15);
    color: var(--accent-yellow);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.timeline-badge.lead {
    background: rgba(168, 85, 247, 0.15);
    color: var(--primary-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.timeline-company {
    color: var(--primary-cyan);
    font-weight: 500;
}

.timeline-period {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.timeline-period i {
    color: var(--primary-cyan);
}

.timeline-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.timeline-tech .tech-pill {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    transition: var(--transition);
}

.timeline-tech .tech-pill:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
}

.timeline-details {
    list-style: none;
    padding: 0;
}

.timeline-details li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    line-height: 1.7;
}

.timeline-details li i {
    color: var(--primary-cyan);
    margin-top: 0.25rem;
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.education-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.education-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-cyan);
    box-shadow: var(--shadow-glow);
}

.education-icon {
    font-size: 3rem;
    color: var(--primary-cyan);
    margin-bottom: 1rem;
}

.education-degree {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.education-school {
    font-size: 1.1rem;
    color: var(--primary-cyan);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.education-period,
.education-location {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   LANGUAGES SECTION
   ============================================ */
.languages-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.language-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    min-width: 160px;
    transition: var(--transition);
}

.language-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-cyan);
    box-shadow: var(--shadow-glow);
}

.language-name {
    display: block;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.language-level {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   PUBLICATIONS SECTION
   ============================================ */
.publications-list {
    max-width: 900px;
    margin: 0 auto;
}

.publication-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.publication-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-purple);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.2);
}

[dir="rtl"] .publication-item:hover {
    transform: translateX(-10px);
}

.publication-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.publication-authors {
    color: var(--primary-cyan);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.publication-journal {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-style: italic;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.publication-link:hover {
    color: var(--text-primary);
}

/* ============================================
   ACHIEVEMENTS SECTION
   ============================================ */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.achievement-item {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.achievement-item:hover {
    transform: translateY(-8px);
    border-color: var(--accent-yellow);
    box-shadow: 0 0 30px rgba(251, 191, 36, 0.2);
}

.achievement-item i {
    font-size: 3rem;
    color: var(--accent-yellow);
    margin-bottom: 1rem;
}

.achievement-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.achievement-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.testimonial-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    overflow: hidden;
}

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

.testimonial-content {
    padding: 2rem;
}

.quote-icon {
    font-size: 2rem;
    color: var(--primary-cyan);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 2rem;
}

.author-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-role {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* GitHub Stats Card */
.github-stats-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
}

.github-stats-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.github-stats-header i {
    font-size: 1.5rem;
}

.github-stats-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.github-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.github-stat .stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.github-stat .stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ============================================
   CONTACT SECTION & CTA
   ============================================ */

/* CTA Hero */
.cta-hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: center;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 4rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.cta-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.cta-badge {
    display: inline-block;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.cta-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 600px;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.cta-btn.primary {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    border: none;
}

.cta-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(34, 211, 238, 0.4);
}

.cta-btn.secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.cta-btn.secondary:hover {
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
    transform: translateY(-3px);
}

/* CTA Visual */
.cta-visual {
    position: relative;
    width: 200px;
    height: 200px;
}

.cta-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 3s ease-in-out infinite;
}

.cta-icon-ring {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 2px solid var(--primary-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.cta-icon-ring i {
    font-size: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Contact Cards */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--primary-cyan);
    transform: translateY(-5px);
}

.contact-card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 1.5rem;
}

.contact-card-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-card-value {
    font-size: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

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

.availability-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
    50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

/* Social Links Row */
.social-links-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link-card {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition);
}

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

/* Legacy contact-content (keep for compatibility) */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    margin-bottom: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-cyan);
}

.contact-item a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
}

.contact-social-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-darker);
    color: var(--text-primary);
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

.footer-note {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ============================================
   SCROLL TO TOP & DARK MODE TOGGLE
   ============================================ */
.scroll-top,
.dark-mode-toggle {
    position: fixed;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 999;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top {
    bottom: 100px;
    opacity: 0;
    visibility: hidden;
}

[dir="rtl"] .scroll-top { left: 30px; }
[dir="ltr"] .scroll-top { right: 30px; }

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover,
.dark-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.dark-mode-toggle {
    bottom: 30px;
}

[dir="rtl"] .dark-mode-toggle { left: 30px; }
[dir="ltr"] .dark-mode-toggle { right: 30px; }

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 10000;
}

[dir="rtl"] .scroll-progress {
    left: auto;
    right: 0;
}

/* ============================================
   LOADING SCREEN
   ============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease-out;
}

.loader-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.loading-text {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
}

.loader {
    width: 60px;
    height: 60px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .featured-card-large {
        grid-column: span 1;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-main {
        grid-template-columns: 1fr;
    }
    
    .radar-chart-container {
        position: static;
        max-width: 400px;
        margin: 0 auto 2rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        flex-direction: column;
        background: var(--bg-dark);
        width: 100%;
        padding: 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-20px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }
    
    [dir="rtl"] .nav-menu { right: 0; }
    [dir="ltr"] .nav-menu { left: 0; }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-image {
        margin: 0 auto 2rem;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-tech-stack,
    .hero-location,
    .hero-social {
        justify-content: center;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .featured-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-highlights {
        grid-template-columns: 1fr;
    }
    
    .tech-stack-showcase {
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .tech-icon-item {
        width: 50px;
        height: 50px;
    }
    
    .tech-icon-item i,
    .tech-icon-item svg {
        font-size: 1.5rem;
        width: 1.5rem;
        height: 1.5rem;
    }
    
    .radar-chart-container {
        max-width: 320px;
        padding: 1.5rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .github-stats-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2.5rem;
    }
    
    .cta-visual {
        display: none;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .cta-actions {
        justify-content: center;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .scroll-top,
    .dark-mode-toggle {
        width: 45px;
        height: 45px;
    }
    
    .scroll-top {
        bottom: 80px;
    }
    
    [dir="rtl"] .scroll-top,
    [dir="rtl"] .dark-mode-toggle { left: 20px; }
    [dir="ltr"] .scroll-top,
    [dir="ltr"] .dark-mode-toggle { right: 20px; }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-image-wrapper {
        width: 160px;
        height: 160px;
    }
    
    .hero-profile-img {
        width: 150px;
        height: 150px;
    }
    
    .hero-image-glow {
        width: 180px;
        height: 180px;
    }
    
    .hero-image-ring {
        width: 170px;
        height: 170px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .featured-card-content,
    .project-card .project-header,
    .project-card .project-features {
        padding: 1.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .tech-stack-showcase {
        gap: 0.75rem;
        padding: 1rem;
    }
    
    .tech-icon-item {
        width: 45px;
        height: 45px;
    }
    
    .tech-icon-item i,
    .tech-icon-item svg {
        font-size: 1.25rem;
        width: 1.25rem;
        height: 1.25rem;
    }
    
    .radar-chart-container {
        max-width: 280px;
        padding: 1rem;
    }
}

/* ============================================
   PARTICLES CANVAS
   ============================================ */
.particles-canvas {
    display: none;
}

/* GitHub Stats Section - Hidden */
#github-stats {
    display: none !important;
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-cyan);
    opacity: 0.5;
}

/* Light mode adjustments */
.light-mode .navbar {
    background: rgba(248, 250, 252, 0.85);
}

.light-mode .hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f8fafc 100%);
}

.light-mode .vanta-background {
    opacity: 0.3;
}

.light-mode .hero-glow {
    background: radial-gradient(circle, rgba(34, 211, 238, 0.1) 0%, transparent 70%);
}

.light-mode .status-badge {
    background: rgba(16, 185, 129, 0.1);
}

.light-mode .glass-card {
    background: rgba(255, 255, 255, 0.8);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .navbar,
    .scroll-top,
    .dark-mode-toggle,
    .vanta-background,
    .hero-glow,
    #loadingScreen,
    .architecture-modal {
        display: none !important;
    }
    
    .section {
        page-break-inside: avoid;
        padding: 1rem 0;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    a {
        text-decoration: underline;
    }
    
    .featured-card,
    .project-card,
    .skill-category,
    .timeline-content {
        border: 1px solid #ccc !important;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@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;
    }
    
    .vanta-background {
        display: none !important;
    }
}