/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

:root {
    /* Color Palette - Dark Tech Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --text-primary: #e8e8f0;
    --text-secondary: #b0b0c0;
    --accent-primary: #4a9eff;
    --accent-secondary: #6b7fd7;
    --accent-glow: rgba(74, 158, 255, 0.3);
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    
    /* Spacing - Enhanced System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s ease;
    --transition-slow: 0.6s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

[data-theme="light"] {
    /* Color Palette - Light Theme */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e9ecef;
    --text-primary: #1a1a24;
    --text-secondary: #4a5568;
    --accent-primary: #2563eb;
    --accent-secondary: #3b82f6;
    --accent-glow: rgba(37, 99, 235, 0.2);
    --border-color: rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Optimize Animations - Use GPU acceleration */
* {
    will-change: auto;
}

.animate,
[data-animate],
.service-card,
.project-card,
.nav-link {
    will-change: transform, opacity;
}

/* ============================================
   BACKGROUND CANVAS
   ============================================ */

#backgroundCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

/* ============================================
   CUSTOM CURSOR
   ============================================ */

.cursor {
    width: 8px;
    height: 8px;
    border: 1px solid var(--accent-primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, opacity 0.2s;
    opacity: 0;
}

.cursor-follower {
    width: 32px;
    height: 32px;
    border: 1px solid var(--accent-primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, opacity 0.3s;
    opacity: 0;
}

body.cursor-active .cursor,
body.cursor-active .cursor-follower {
    opacity: 1;
}

.cursor.hover,
.cursor-follower.hover {
    width: 48px;
    height: 48px;
    background: var(--accent-glow);
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .nav {
    background: rgba(248, 249, 250, 0.9);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lang-toggle {
    min-width: 50px;
    height: 40px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    padding: 0 var(--spacing-sm);
    position: relative;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-mono);
    box-shadow: var(--shadow-sm);
}

.lang-toggle:hover {
    box-shadow: var(--shadow-md);
}

.lang-toggle:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Theme Toggle Switch */
.theme-toggle {
    width: 60px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-right: var(--spacing-sm);
}

.theme-toggle-track {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.theme-toggle-track::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity 0.4s ease;
}

[data-theme="light"] .theme-toggle-track::before {
    opacity: 1;
}

.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    z-index: 2;
}

[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(28px);
    background: #ffd700;
}

.theme-icon {
    width: 14px;
    height: 14px;
    position: absolute;
    transition: opacity 0.4s ease, transform 0.4s ease;
    color: var(--accent-primary);
}

.theme-icon-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

.theme-icon-moon {
    opacity: 1;
}

[data-theme="light"] .theme-icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    color: #ff8c00;
}

[data-theme="light"] .theme-icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.theme-toggle:hover .theme-toggle-track {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: 20px;
}

.lang-toggle:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-md), 0 0 15px var(--accent-glow);
}

.lang-text {
    transition: opacity var(--transition-normal);
    display: inline-block;
}

.lang-text[data-lang="fr"] {
    opacity: 1;
}

.lang-text[data-lang="en"] {
    opacity: 0;
    position: absolute;
}

[data-lang="en"] .lang-text[data-lang="fr"] {
    opacity: 0;
}

[data-lang="en"] .lang-text[data-lang="en"] {
    opacity: 1;
    position: static;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    letter-spacing: 2px;
    font-family: var(--font-mono);
    position: relative;
    transition: all var(--transition-normal);
    cursor: pointer;
    display: inline-block;
}

.nav-logo::before {
    content: '';
    position: absolute;
    inset: -4px;
    border: 2px solid var(--accent-primary);
    border-radius: 4px;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-normal);
}

.nav-logo:hover {
    transform: scale(1.1);
    text-shadow: 0 0 20px var(--accent-glow);
}

.nav-logo:hover::before {
    opacity: 0.3;
    transform: scale(1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

.nav-link:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

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

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

/* Better Focus States */
.nav-link:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

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

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    z-index: 9999;
    transition: width 0.1s ease;
    box-shadow: 0 0 15px var(--accent-glow), 0 2px 10px rgba(74, 158, 255, 0.5);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--accent-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.back-to-top:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    padding: var(--spacing-xl) var(--spacing-md);
    background: radial-gradient(ellipse at center, rgba(74, 158, 255, 0.05) 0%, transparent 70%);
}

.hero-content {
    max-width: 900px;
    text-align: center;
    width: 100%;
}

.hero-text {
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-title .line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: textReveal 0.8s ease forwards;
}

.hero-title .line:nth-child(1) {
    animation-delay: 0.1s;
}

.hero-title .line:nth-child(2) {
    animation-delay: 0.3s;
    color: var(--accent-primary);
    text-shadow: 0 0 20px var(--accent-glow);
    position: relative;
}

.hero-title .line:nth-child(2)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    animation: underlineExpand 0.8s ease 1s forwards;
    border-radius: 2px;
}

@keyframes underlineExpand {
    to {
        width: 100%;
    }
}

.hero-title .line:nth-child(3) {
    animation-delay: 0.5s;
}

.hero-title .line:nth-child(4) {
    animation-delay: 0.7s;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-scroll {
    margin-top: var(--spacing-xl);
    cursor: pointer;
}

.hero-scroll:hover .scroll-indicator {
    transform: translateY(10px);
}

.scroll-indicator {
    display: inline-block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 12px;
    position: relative;
    opacity: 0;
    animation: fadeIn 1s ease 1s forwards;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.scroll-indicator:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px var(--accent-glow);
    transform: translateY(5px);
}

.scroll-indicator span {
    display: block;
    width: 4px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollDown 2s infinite;
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
    position: relative;
    z-index: 1;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 60vh;
}

/* Section Dividers */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.section:first-of-type::before {
    display: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
    position: relative;
    width: 100%;
}

.section-title.animate {
    opacity: 1;
    transform: translateY(0);
}

/* About section specific title styling */
.about .section-title {
    margin-bottom: var(--spacing-md);
}

/* ============================================
   ABOUT SECTION - Creative Asymmetric Design
   ============================================ */

.about {
    position: relative;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    position: relative;
}

.about-content.animate {
    opacity: 1;
    transform: translateY(0);
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin: 0;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.about-text:first-child {
    text-align: center;
    max-width: 90%;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: relative;
}

.about-text:first-child::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.about-text:first-child::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 2px;
}

.about-text:nth-child(2) {
    max-width: 85%;
    margin-left: auto;
    text-align: right;
    padding-right: var(--spacing-xl);
    border-left: none;
    border-right: 3px solid var(--accent-primary);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
}

.about-text:nth-child(2)::before {
    content: '';
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 15px var(--accent-glow);
}

.about-text:hover {
    border-color: var(--accent-primary);
    transform: translateX(-8px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
    color: var(--text-primary);
}

.about-text:nth-child(2):hover {
    transform: translateX(8px);
}

/* Floating accent shapes */
.about::before {
    content: '';
    position: absolute;
    top: 15%;
    right: 5%;
    width: 150px;
    height: 150px;
    border: 2px solid var(--accent-primary);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.1;
    transform: rotate(45deg);
    animation: float 6s ease-in-out infinite;
}

.about::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: 5%;
    width: 100px;
    height: 100px;
    border: 2px solid var(--accent-secondary);
    border-radius: 63% 37% 54% 46% / 55% 48% 52% 45%;
    opacity: 0.08;
    transform: rotate(-30deg);
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    50% {
        transform: translateY(-20px) rotate(50deg);
    }
}

.about .container {
    position: relative;
    z-index: 1;
}

/* ============================================
   SERVICES SECTION
   ============================================ */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(30px);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(74, 158, 255, 0.1), transparent);
    transition: left 0.5s;
}

.service-card:hover::before {
    left: 100%;
}

.service-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.service-card {
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-12px) scale(1.03);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.service-card:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--accent-primary);
    transition: transform var(--transition-normal);
    filter: drop-shadow(0 0 10px var(--accent-glow));
}

.service-card:hover .service-icon {
    transform: scale(1.15) rotate(5deg);
    filter: drop-shadow(0 0 20px var(--accent-glow));
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    transition: color var(--transition-normal);
}

.service-card:hover .service-description {
    color: var(--text-primary);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.project-card {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    min-height: 280px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(30px);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.project-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.project-overlay::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(74, 158, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 0.15;
}

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

.project-card {
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-12px) scale(1.03);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg), 0 0 30px var(--accent-glow);
}

.project-card:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}

.project-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    transition: color var(--transition-normal);
    position: relative;
}

.project-card:hover .project-title {
    color: var(--accent-primary);
    text-shadow: 0 0 10px var(--accent-glow);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    transition: color var(--transition-normal);
}

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

.project-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(74, 158, 255, 0.2), transparent);
    transition: left 0.3s;
}

.tag:hover {
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 158, 255, 0.2);
}

.tag:hover::before {
    left: 100%;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.contact-content.animate {
    opacity: 1;
    transform: translateY(0);
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    transition: color var(--transition-normal);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

.contact-content:hover .contact-text {
    color: var(--text-primary);
    background: rgba(74, 158, 255, 0.05);
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.contact-link {
    transition: all var(--transition-normal);
}

.contact-link:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-md), 0 0 15px var(--accent-glow);
}

.contact-link:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.contact-link-icon {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-primary);
    transition: transform var(--transition-normal);
    display: inline-block;
}

.contact-link:hover .contact-link-icon {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    position: relative;
    z-index: 1;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: var(--bg-secondary);
    margin-top: var(--spacing-xl);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.3;
}

.footer p {
    margin: 0;
    transition: color var(--transition-fast);
}

.footer:hover p {
    color: var(--text-primary);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes textReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scrollDown {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) translateY(16px);
        opacity: 0.5;
    }
}

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

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 1000;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: 1rem;
        padding: var(--spacing-sm);
        display: block;
        border-radius: 8px;
        transition: all var(--transition-fast);
    }

    .nav-link:hover {
        background: var(--bg-tertiary);
    }

    .nav-controls {
        gap: var(--spacing-xs);
    }

    .theme-toggle {
        width: 52px;
        height: 28px;
        margin-right: var(--spacing-xs);
    }

    .theme-toggle-thumb {
        width: 20px;
        height: 20px;
    }

    [data-theme="light"] .theme-toggle-thumb {
        transform: translateX(24px);
    }

    .lang-toggle {
        width: 44px;
        height: 36px;
        font-size: 0.8rem;
    }

    .back-to-top {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 44px;
        height: 44px;
    }

    .hero {
        min-height: 90vh;
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .contact-links {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-link {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-menu {
        gap: var(--spacing-xs);
    }

    .nav-link {
        font-size: 0.8rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .about-text:first-child {
        grid-column: 1;
    }

    .about::before,
    .about::after {
        display: none;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.fade-in {
    animation: fadeIn var(--transition-slow) ease forwards;
}