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

:root {
    --primary-color: #00d4ff;
    --secondary-color: #ff6b6b;
    --accent-color: #4ecdc4;
    --gold-accent: #ffd700;
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-light: #94a3b8;
    --text-muted: #64748b;
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #121212;
    --bg-glass: rgba(255, 255, 255, 0.02);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 212, 255, 0.3);
    --shadow-light: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 16px 64px rgba(0, 0, 0, 0.4);
    --shadow-heavy: 0 32px 128px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --shadow-accent: 0 0 60px rgba(255, 107, 107, 0.2);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #4ecdc4 50%, #ff6b6b 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b6b 0%, #ffd700 100%);
    --gradient-dark: linear-gradient(135deg, rgba(0, 0, 0, 0.9) 0%, rgba(17, 17, 17, 0.8) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --border-radius: 16px;
    --border-radius-large: 24px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-smooth: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    --animation-duration: 0.8s;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 107, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(78, 205, 196, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.02)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
    z-index: -1;
}

html {
    scroll-behavior: smooth;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    letter-spacing: 0.5px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
    border: 1px solid var(--border-glow);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow), 0 20px 40px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

/* CV Button - Premium Style */
.btn-cv {
    background: var(--gradient-accent);
    color: white;
    border: 1px solid var(--gold-accent);
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-cv::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.btn-cv:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 
        0 0 40px rgba(255, 215, 0, 0.5),
        0 20px 40px rgba(255, 107, 107, 0.3);
    border-color: var(--gold-accent);
}

.btn-cv:hover::before {
    left: 100%;
}

.btn-cv i {
    font-size: 1.1rem;
    margin-right: 0.5rem;
    color: var(--gold-accent);
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.5));
    animation: cvIconPulse 2s ease-in-out infinite;
}

@keyframes cvIconPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.5));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.8));
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition-smooth);
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: var(--shadow-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 300;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    position: relative;
}

.logo-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient-primary);
    transition: width 0.6s ease;
}

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

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: -0.25rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 400;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
    letter-spacing: 0.5px;
}

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

.nav-link::before {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 50%;
    background: var(--gradient-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    top: 50%;
    left: -10px;
    transform: translateY(-50%) scale(0);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateY(-50%) scale(1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 107, 107, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(78, 205, 196, 0.05) 0%, transparent 50%);
    padding-top: 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 49%, rgba(0, 212, 255, 0.03) 50%, transparent 51%),
                linear-gradient(-45deg, transparent 49%, rgba(255, 107, 107, 0.02) 50%, transparent 51%);
    background-size: 100px 100px;
    animation: backgroundMove 20s linear infinite;
    pointer-events: none;
}

@keyframes backgroundMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(100px, 100px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 200;
    margin-bottom: 2rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.greeting {
    display: block;
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--text-light);
    margin-bottom: 1rem;
    opacity: 0.8;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.name {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.name::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: nameUnderline 2s ease-in-out 1s forwards;
}

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

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 600px;
    line-height: 1.8;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.hero-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-glass);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    padding: 1px;
    background: var(--gradient-primary);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
}

.social-link:hover::before {
    opacity: 1;
}

.social-link:hover {
    color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    background: var(--bg-glass);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-avatar {
    position: relative;
}

.profile-image-container {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    box-shadow: 
        var(--shadow-heavy), 
        0 0 100px rgba(0, 212, 255, 0.2),
        inset 0 0 50px rgba(255, 255, 255, 0.05);
    animation: profileFloat 8s ease-in-out infinite;
    border: 2px solid transparent;
    background: var(--gradient-primary);
    background-clip: padding-box;
}

.profile-image-container::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    padding: 2px;
    background: var(--gradient-primary);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    animation: borderRotate 4s linear infinite;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: var(--transition-smooth);
    position: relative;
    z-index: 1;
}

.profile-image:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

@keyframes profileFloat {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg);
    }
    25% { 
        transform: translateY(-20px) rotate(1deg);
    }
    50% { 
        transform: translateY(-10px) rotate(0deg);
    }
    75% { 
        transform: translateY(-30px) rotate(-1deg);
    }
}

@keyframes borderRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.image-placeholder p {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    text-align: center;
    font-weight: 300;
    letter-spacing: 0.5px;
    z-index: 1;
    position: relative;
}

.avatar-circle {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: white;
    box-shadow: var(--shadow-heavy);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg);
    }
    25% { 
        transform: translateY(-25px) rotate(2deg);
    }
    50% { 
        transform: translateY(-15px) rotate(0deg);
    }
    75% { 
        transform: translateY(-35px) rotate(-2deg);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { 
        transform: translateY(0) rotate(-45deg);
        opacity: 1;
    }
    40% { 
        transform: translateY(-15px) rotate(-45deg);
        opacity: 0.8;
    }
    60% { 
        transform: translateY(-8px) rotate(-45deg);
        opacity: 0.9;
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* Premium Scroll Animations */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(60px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal classes */
.reveal-left {
    animation: slideInFromLeft 0.8s ease-out forwards;
}

.reveal-right {
    animation: slideInFromRight 0.8s ease-out forwards;
}

.reveal-scale {
    animation: scaleIn 0.8s ease-out forwards;
}

.reveal-up {
    animation: fadeInUp 0.8s ease-out forwards;
}

/* Scroll Indicator - Premium Style */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: float 3s ease-in-out infinite;
}

.scroll-arrow {
    width: 35px;
    height: 35px;
    border: 3px solid var(--primary-color);
    border-top: none;
    border-right: none;
    transform: rotate(-45deg);
    animation: bounce 2.5s infinite;
    position: relative;
    filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.3));
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-top: none;
    border-right: none;
    transform: rotate(0deg);
    animation: spin 8s linear infinite;
}

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-light);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.8s;
}

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

.stat:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-glow);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 200;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.info-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-light);
    margin-bottom: 2rem;
    transition: var(--transition);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.6s ease;
}

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

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

.info-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.education-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.education-item p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.duration {
    color: var(--text-light);
    font-size: 0.9rem;
}

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

.interest-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Skills Section */
.skills {
    padding: 5rem 0;
}

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

.skill-category {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    padding: 3rem 2rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition-smooth);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glass);
    opacity: 0;
    transition: opacity 0.6s ease;
}

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

.skill-category:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-glow);
}

.skill-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
}

.skill-category:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { 
        box-shadow: var(--shadow-glow);
    }
    50% { 
        box-shadow: var(--shadow-glow), 0 0 60px rgba(0, 212, 255, 0.4);
    }
}

.skill-category h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.skill-tag {
    background: var(--bg-glass);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 400;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.4s ease;
    z-index: -1;
}

.skill-tag:hover::before {
    left: 0;
}

.skill-tag:hover {
    color: white;
    transform: translateY(-3px) scale(1.05);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

/* Experience Section */
.experience {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: var(--gradient-primary);
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-item {
    padding: 2rem 2rem 2rem 2rem;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -16px;
}

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

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.timeline-content h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-date {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.timeline-location {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-left: 1rem;
}

.timeline-content ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Projects Section */
.projects {
    padding: 5rem 0;
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 1rem 2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 400;
    letter-spacing: 0.5px;
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.5s ease;
    z-index: -1;
}

.filter-btn:hover::before,
.filter-btn.active::before {
    left: 0;
}

.filter-btn:hover,
.filter-btn.active {
    color: white;
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.loading-projects {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.project-stars {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.project-language {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.project-updated {
    color: var(--text-light);
    font-size: 0.8rem;
}

.error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.error-message p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.projects-grid.loading {
    min-height: 400px;
}

.fade-in-project {
    animation: fadeInProject 0.5s ease-in forwards;
}

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

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

.project-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-smooth);
    backdrop-filter: blur(20px);
    position: relative;
    cursor: pointer;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glass);
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

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

.project-card:hover {
    transform: translateY(-20px) scale(1.02);
    box-shadow: var(--shadow-glow), var(--shadow-heavy);
    border-color: var(--border-glow);
}

.project-image {
    height: 250px;
    background: var(--gradient-dark);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-auto-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
    filter: grayscale(20%);
}

.project-card:hover .project-auto-image {
    transform: scale(1.1);
    filter: grayscale(0%);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

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

.project-links {
    display: flex;
    gap: 1.5rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.project-card:hover .project-links {
    transform: translateY(0);
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.project-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.project-link:hover::before {
    opacity: 1;
}

.project-link:hover {
    color: white;
    transform: scale(1.2) rotate(10deg);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.project-tech-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.project-period {
    color: var(--text-light);
    font-size: 0.9rem;
    font-style: italic;
}

/* Certificates Section */
.certificates {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.certificate-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.certificate-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.certificate-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.certificate-card p {
    color: var(--text-secondary);
}

/* Contact Section */
.contact {
    padding: 5rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-methods {
    margin-bottom: 2rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-method:hover {
    background: white;
    box-shadow: var(--shadow-light);
}

.contact-method i {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-method h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

.contact-method a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links .social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    width: auto;
    height: auto;
}

.social-links .social-link:hover {
    border-color: var(--primary-color);
    background: var(--gradient-primary);
    color: white;
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.form-group {
    position: relative;
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: transparent;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-light);
    font-size: 1rem;
    transition: var(--transition);
    pointer-events: none;
    background: var(--bg-card);
    padding: 0 0.5rem;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.8rem;
    color: var(--primary-color);
}

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

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

.footer-text p {
    margin-bottom: 0.5rem;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
        .nav-menu {
            position: fixed;
            left: -100%;
            top: 70px;
            flex-direction: column;
            background-color: var(--bg-primary);
            border: 1px solid var(--border-color);
            width: 100%;
            text-align: center;
            transition: 0.3s;
            box-shadow: var(--shadow-medium);
            padding: 2rem 0;
        }    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::after {
        left: 15px;
    }

    .timeline-content::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent white transparent transparent;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }

        .avatar-circle {
            width: 200px;
            height: 200px;
            font-size: 4rem;
        }

        .profile-image-container {
            width: 200px;
            height: 200px;
        }    .projects-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .skill-category {
        padding: 1.5rem;
    }

    .timeline-item {
        padding-left: 50px;
    }

    .contact-form {
        padding: 1.5rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

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

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

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

/* Scroll animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }