/* ═══════════════════════════════════════════════════════════════════════════
   SECTIONS - All Section Styles
   ═══════════════════════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════════════════════════════ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-6) 0;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.nav.scrolled {
    padding: var(--space-4) 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-xl);
    z-index: 10;
}

.nav-logo-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--bg-primary);
    font-size: var(--text-sm);
    position: relative;
    overflow: hidden;
}

.nav-logo-icon::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: linear-gradient(transparent, rgba(255,255,255,0.3), transparent);
    transform: rotate(45deg) translateY(-100%);
    animation: shimmer 3s infinite;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-10);
}

.nav-link {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: color var(--duration-normal);
    position: relative;
    padding: var(--space-2) 0;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Language Selector */
.lang-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: all var(--duration-normal);
}

.lang-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-2);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--duration-normal) var(--ease-out-back);
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: all var(--duration-fast);
    width: 100%;
    text-align: left;
}

.lang-option:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    z-index: 10;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--duration-normal) var(--ease-out-back);
    transform-origin: center;
}

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

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

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

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu .nav-link {
    font-size: var(--text-2xl);
    font-weight: 600;
    opacity: 0;
    transform: translateY(20px);
}

.mobile-menu.active .nav-link {
    animation: fadeInUp 0.4s ease forwards;
}

.mobile-menu.active .nav-link:nth-child(1) { animation-delay: 0.1s; }
.mobile-menu.active .nav-link:nth-child(2) { animation-delay: 0.15s; }
.mobile-menu.active .nav-link:nth-child(3) { animation-delay: 0.2s; }
.mobile-menu.active .nav-link:nth-child(4) { animation-delay: 0.25s; }
.mobile-menu.active .nav-link:nth-child(5) { animation-delay: 0.3s; }
.mobile-menu.active .btn { animation-delay: 0.35s; opacity: 0; transform: translateY(20px); animation: fadeInUp 0.4s ease forwards; animation-delay: 0.35s; }

/* ═══════════════════════════════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 100px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 60% at 80% 20%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 50% 80% at 40% 80%, rgba(0, 102, 255, 0.05) 0%, transparent 50%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 80% 80% at center, black 20%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-text {
    max-width: 650px;
}

.hero-badge {
    margin-bottom: var(--space-8);
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-6xl);
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.hero-title-line {
    display: block;
    overflow: hidden;
}

.hero-title-word {
    display: inline-block;
}

.hero-tagline {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.hero-tagline strong {
    color: var(--text-primary);
}

.hero-description {
    font-size: var(--text-base);
    color: var(--text-tertiary);
    margin-bottom: var(--space-8);
    line-height: 1.8;
    max-width: 540px;
}

.hero-roles {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-10);
}

.hero-role {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: all var(--duration-normal);
}

.hero-role:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 500px;
}

.hero-orbs {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: float 8s ease-in-out infinite;
    will-change: transform;
}

.hero-orb-1 {
    width: 350px;
    height: 350px;
    background: rgba(0, 240, 255, 0.12);
    top: 5%;
    left: 5%;
}

.hero-orb-2 {
    width: 280px;
    height: 280px;
    background: rgba(168, 85, 247, 0.1);
    bottom: 10%;
    right: 5%;
    animation-delay: -3s;
}

.hero-orb-3 {
    width: 200px;
    height: 200px;
    background: rgba(0, 102, 255, 0.08);
    top: 40%;
    left: 40%;
    animation-delay: -5s;
}

/* Hero SVG Animation */
.hero-svg-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.hero-svg {
    width: 100%;
    height: 100%;
}

/* Floating Cards */
.hero-cards {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-card {
    position: absolute;
    background: rgba(12, 12, 12, 0.9);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    backdrop-filter: blur(20px);
    animation: float 6s ease-in-out infinite;
    will-change: transform;
}

.hero-card-icon {
    font-size: var(--text-xl);
}

.hero-card-text h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 2px;
}

.hero-card-text p {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.hero-card-1 {
    top: 10%;
    right: 5%;
    animation-delay: -1s;
}

.hero-card-2 {
    bottom: 25%;
    left: 0;
    animation-delay: -2.5s;
}

.hero-card-3 {
    bottom: 10%;
    right: 15%;
    animation-delay: -4s;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-tertiary);
    font-size: var(--text-xs);
    animation: bounce 2.5s ease-in-out infinite;
}

.scroll-mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-tertiary);
    border-radius: 13px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 10px;
    background: var(--text-tertiary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

/* ═══════════════════════════════════════════════════════════════════════════
   ABOUT SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.about {
    background: var(--bg-secondary);
    position: relative;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.about-content h3 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.8;
}

.about-content p strong {
    color: var(--text-primary);
}

.about-quote {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-card);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: italic;
    color: var(--text-secondary);
    position: relative;
}

.about-quote::before {
    content: '"';
    position: absolute;
    top: var(--space-2);
    left: var(--space-4);
    font-size: var(--text-4xl);
    color: var(--accent-primary);
    opacity: 0.3;
    font-family: Georgia, serif;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--duration-slow) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--duration-slow) var(--ease-out-expo);
}

.stat-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-2);
}

/* Data Flow Visualization */
.dataflow {
    margin-top: var(--space-16);
    padding: var(--space-12);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}

.dataflow::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 100%, rgba(0, 240, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.dataflow-header {
    text-align: center;
    margin-bottom: var(--space-12);
    position: relative;
}

.dataflow-header h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.dataflow-header p {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.dataflow-nodes {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    padding: 0 var(--space-4);
}

.dataflow-line {
    position: absolute;
    top: 50%;
    left: 8%;
    right: 8%;
    height: 3px;
    background: var(--gradient-primary);
    transform: translateY(-50%);
    z-index: 0;
    border-radius: var(--radius-full);
}

.dataflow-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.dataflow-particle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 0 20px var(--accent-primary), 0 0 40px var(--accent-primary);
    animation: flowParticle 4s linear infinite;
}

.dataflow-particle:nth-child(2) { animation-delay: -1.33s; }
.dataflow-particle:nth-child(3) { animation-delay: -2.66s; }

.dataflow-node {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.dataflow-node-icon {
    width: 70px;
    height: 70px;
    background: var(--bg-elevated);
    border: 2px solid var(--border-default);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    transition: all var(--duration-normal) var(--ease-out-back);
    position: relative;
}

.dataflow-node-icon::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    border: 2px solid transparent;
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.dataflow-node:hover .dataflow-node-icon {
    border-color: var(--accent-primary);
    transform: scale(1.1) translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.dataflow-node:hover .dataflow-node-icon::before {
    opacity: 1;
    border-color: var(--accent-primary);
    animation: pulseRing 1.5s ease-out infinite;
}

.dataflow-node-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-align: center;
    font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════════════════
   EXPERIENCE SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.experience {
    background: var(--bg-primary);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 var(--space-12) var(--space-12);
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: var(--space-12);
    padding-left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
    padding-left: var(--space-12);
    padding-right: 0;
}

.timeline-marker {
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    top: 0;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -9px;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -9px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-slow) var(--ease-out-expo);
}

.timeline-content:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.timeline-years {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--accent-primary);
    margin-bottom: var(--space-2);
    display: inline-block;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.timeline-company {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.timeline-description {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.timeline-item:nth-child(odd) .timeline-tags {
    justify-content: flex-end;
}

/* Timeline RTL support */
[dir="rtl"] .timeline::before {
    left: auto;
    right: 50%;
    transform: translateX(50%);
}

[dir="rtl"] .timeline-item:nth-child(odd) {
    left: auto;
    right: 0;
    text-align: left;
    padding-right: 0;
    padding-left: var(--space-12);
}

[dir="rtl"] .timeline-item:nth-child(even) {
    left: auto;
    right: 50%;
    text-align: right;
    padding-left: 0;
    padding-right: var(--space-12);
}

[dir="rtl"] .timeline-item:nth-child(odd) .timeline-marker {
    right: auto;
    left: -9px;
}

[dir="rtl"] .timeline-item:nth-child(even) .timeline-marker {
    left: auto;
    right: -9px;
}

[dir="rtl"] .timeline-item:nth-child(odd) .timeline-tags {
    justify-content: flex-start;
}

[dir="rtl"] .timeline-item:nth-child(even) .timeline-tags {
    justify-content: flex-end;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SKILLS SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.skills {
    background: var(--bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    transition: all var(--duration-slow) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 0%),
                rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.skill-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-8px);
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.skill-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    position: relative;
}

.skill-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.skill-item {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: all var(--duration-fast);
    cursor: default;
}

.skill-item:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════════════════════════
   PROJECTS SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--duration-slow) var(--ease-out-expo);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-8px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.project-card.featured {
    grid-column: span 2;
    flex-direction: row;
}

.project-visual {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.project-card.featured .project-visual {
    width: 50%;
    height: auto;
    min-height: 350px;
}

.project-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(0,0,0,0.3));
    pointer-events: none;
}

.project-browser {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
    width: 85%;
    max-width: 320px;
    position: relative;
    z-index: 1;
}

.project-browser-bar {
    display: flex;
    gap: 6px;
    margin-bottom: var(--space-3);
}

.project-browser-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.project-browser-dot:nth-child(1) { background: #ef4444; }
.project-browser-dot:nth-child(2) { background: #fbbf24; }
.project-browser-dot:nth-child(3) { background: #10b981; }

.project-browser-content {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.project-info {
    padding: var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-category {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-2);
}

.project-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.project-card.featured .project-title {
    font-size: var(--text-2xl);
}

.project-description {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.project-tech-item {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--accent-primary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: gap var(--duration-normal);
}

.project-link:hover {
    gap: var(--space-3);
}

/* ═══════════════════════════════════════════════════════════════════════════
   CONTACT SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.contact {
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.8;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.contact-link:hover {
    border-color: var(--border-accent);
    transform: translateX(8px);
    box-shadow: -8px 0 20px rgba(0, 240, 255, 0.1);
}

.contact-link-icon {
    width: 52px;
    height: 52px;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.contact-link-text h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 2px;
}

.contact-link-text p {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* Challenge Box */
.challenge-box {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.challenge-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-default);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.challenge-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 600;
    font-size: var(--text-lg);
}

.challenge-meta {
    display: flex;
    gap: var(--space-2);
}

.challenge-badge {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
}

.challenge-lang {
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-primary);
}

.challenge-diff {
    background: rgba(251, 191, 36, 0.1);
    color: var(--accent-gold);
}

.challenge-code {
    padding: var(--space-6);
    background: var(--bg-primary);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.8;
    overflow-x: auto;
    white-space: pre-wrap;
}

.challenge-code .keyword { color: var(--accent-tertiary); }
.challenge-code .string { color: var(--accent-warm); }
.challenge-code .function { color: var(--accent-primary); }
.challenge-code .comment { color: var(--text-muted); font-style: italic; }
.challenge-code .error {
    color: var(--accent-red);
    background: rgba(239, 68, 68, 0.15);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
}

.challenge-form {
    padding: var(--space-6);
    display: flex;
    gap: var(--space-3);
}

.challenge-input {
    flex: 1;
    padding: var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    transition: all var(--duration-normal);
}

.challenge-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
}

.challenge-submit {
    padding: var(--space-4) var(--space-6);
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--duration-normal);
}

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

.challenge-actions {
    padding: 0 var(--space-6) var(--space-6);
    display: flex;
    gap: var(--space-3);
}

.challenge-action {
    padding: var(--space-3) var(--space-4);
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: all var(--duration-fast);
}

.challenge-action:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.challenge-feedback {
    padding: var(--space-4) var(--space-6);
    margin: 0 var(--space-6) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    display: none;
}

.challenge-feedback.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
}

.challenge-feedback.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent-green);
}

.challenge-hint {
    padding: var(--space-4) var(--space-6);
    margin: 0 var(--space-6) var(--space-6);
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    color: var(--accent-gold);
    display: none;
}

.challenge-hint.visible {
    display: block;
}

.challenge-success {
    padding: var(--space-8);
    text-align: center;
    display: none;
}

.challenge-success.visible {
    display: block;
    animation: scaleIn var(--duration-slow) var(--ease-out-back);
}

.challenge-success-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    animation: bounce 1s ease-in-out;
}

.challenge-success h4 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--accent-green);
}

.challenge-success p {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.contact-form {
    display: none;
    padding: var(--space-6);
    border-top: 1px solid var(--border-default);
}

.contact-form.visible {
    display: block;
    animation: slideUp var(--duration-slow) var(--ease-out-expo);
}

.form-submit {
    width: 100%;
    padding: var(--space-4);
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--text-base);
    transition: all var(--duration-normal);
    margin-top: var(--space-4);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════════════ */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-default);
    padding: var(--space-8) 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
}

.footer-copy {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social-link {
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--duration-normal) var(--ease-out-back);
}

.footer-social-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 240, 255, 0.2);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
    .nav-links,
    .nav-cta,
    .lang-selector {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-menu .lang-selector {
        display: block;
        margin-top: var(--space-8);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-roles {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

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

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

@media (max-width: 768px) {
    .timeline::before {
        left: 0;
    }

    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        left: 0;
        text-align: left;
        padding-left: var(--space-10);
        padding-right: 0;
    }

    .timeline-marker,
    .timeline-item:nth-child(odd) .timeline-marker,
    .timeline-item:nth-child(even) .timeline-marker {
        left: -9px;
        right: auto;
    }

    .timeline-item:nth-child(odd) .timeline-tags {
        justify-content: flex-start;
    }

    /* Mobile RTL timeline */
    [dir="rtl"] .timeline::before {
        left: auto;
        right: 0;
        transform: none;
    }

    [dir="rtl"] .timeline-item,
    [dir="rtl"] .timeline-item:nth-child(odd),
    [dir="rtl"] .timeline-item:nth-child(even) {
        right: 0;
        text-align: right;
        padding-left: 0;
        padding-right: var(--space-10);
    }

    [dir="rtl"] .timeline-marker,
    [dir="rtl"] .timeline-item:nth-child(odd) .timeline-marker,
    [dir="rtl"] .timeline-item:nth-child(even) .timeline-marker {
        left: auto;
        right: -9px;
    }

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

    .project-card.featured {
        grid-column: span 1;
        flex-direction: column;
    }

    .project-card.featured .project-visual {
        width: 100%;
        min-height: 220px;
    }

    .dataflow-nodes {
        flex-wrap: wrap;
        gap: var(--space-8);
        justify-content: center;
    }

    .dataflow-line {
        display: none;
    }

    .dataflow-particle {
        display: none;
    }
}

@media (max-width: 640px) {
    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .scroll-indicator {
        display: none;
    }

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

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