:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #a855f7;
    --youtube: #ff0000;
    --youtube-hover: #cc0000;
    --text: #1e293b;
    --text-light: #64748b;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg: #f8fafc;
    --bg-alt: #f1f5f9;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient: #6366f1;
    --gradient-hover: #4f46e5;
    --primary-color: #6366f1;
    --accent-color: #8b5cf6;
    --border-color: #e2e8f0;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #a855f7;
    --accent: #c084fc;
    --youtube: #ff4444;
    --youtube-hover: #ff6666;
    --text: #ffffff;
    --text-light: #e5e5e5;
    --text-primary: #ffffff;
    --text-secondary: #e5e5e5;
    --bg: #000000;
    --bg-alt: #1a1a1a;
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --border: #333333;
    --shadow: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(255, 255, 255, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(255, 255, 255, 0.1), 0 4px 6px -2px rgba(255, 255, 255, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(255, 255, 255, 0.1), 0 10px 10px -5px rgba(255, 255, 255, 0.04);
    --gradient: #8b5cf6;
    --gradient-hover: #7c3aed;
    --primary-color: #8b5cf6;
    --accent-color: #c084fc;
    --border-color: #333333;
}

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
    overflow-y: scroll;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0.75rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.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 0.5s;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
    transform: perspective(1px) translateZ(0);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-youtube {
    background: var(--youtube);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-youtube:hover {
    background: var(--youtube-hover);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 2px solid var(--text);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle:hover {
    background: var(--text);
    color: var(--bg);
    transform: translateY(-2px);
}

.theme-toggle i {
    font-size: 1.1rem;
}
/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 2px solid var(--text);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle:hover {
    background: var(--text);
    color: var(--bg);
    transform: translateY(-2px);
}

.theme-toggle i {
    font-size: 1.1rem;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(248, 250, 252, 0.95);
    backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] nav {
    background: rgba(0, 0, 0, 0.95);
    border-bottom: 1px solid rgba(51, 51, 51, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.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 {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(99, 102, 241, 0.08) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    scroll-snap-align: start;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    animation: fadeInLeft 1s ease-out;
}

.greeting {
    display: block;
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.name {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 1s forwards;
}

.button-row.primary-actions {
    display: flex;
    gap: 1rem;
    width: 100%;
}

.youtube-button-full {
    align-self: flex-start;
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInRight 1s ease-out;
}

.profile-photo {
    width: 400px;
    height: 400px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
    background: var(--primary-color);
    padding: 4px;
}

.profile-photo::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--primary-color);
    border-radius: 50%;
    z-index: -1;
    animation: rotate 10s linear infinite;
}

.profile-photo:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    background: transparent;
    position: relative;
    z-index: 1;
    filter: contrast(1.1) brightness(1.05);
    transition: var(--transition);
    border-radius: 50%;
}

.profile-photo:hover img {
    filter: contrast(1.15) brightness(1.08) saturate(1.1);
}

/* About Section */
.about {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    align-items: center;
    scroll-snap-align: start;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.about-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

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

.stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-skills-preview h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.skills-list {
    list-style: none;
}

.skills-list li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: 1.5rem;
}

.skills-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* Experience Section */
.experience {
    padding: 6rem 0;
    background: var(--bg-secondary);
    scroll-snap-align: start;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
}

.timeline-dot {
    position: absolute;
    left: 21px;
    top: 0;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--bg-secondary);
}

.timeline-content {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.timeline-header {
    margin-bottom: 1rem;
}

.job-title {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.company {
    font-weight: 500;
    color: var(--text-primary);
    margin-right: 1rem;
}

.duration {
    color: var(--text-secondary);
    font-size: 0.875rem;
    background: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
}

.job-description p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.job-description ul {
    list-style: none;
    padding-left: 0;
}

.job-description li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.job-description li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* Projects Section */
.projects {
    padding: 6rem 0;
    background: var(--bg-primary);
    scroll-snap-align: start;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-primary);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.6);
    position: relative;
    transform: perspective(1px) translateZ(0);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.project-card:hover::before {
    opacity: 0.05;
}

.project-card:hover {
    transform: translateY(-15px) rotateX(5deg);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.project-image {
    background: var(--primary-color);
    padding: 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.project-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
}

.project-image i {
    font-size: 3rem;
    color: white;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.project-card:hover .project-image i {
    transform: scale(1.1) rotateY(15deg);
}

.project-content {
    padding: 2.5rem;
    position: relative;
    z-index: 1;
}

.project-title {
    font-size: 1.375rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 1rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.tech-tag {
    background: linear-gradient(135deg, var(--bg-secondary), var(--border-color));
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.project-card:hover .tech-tag {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.project-links {
    display: flex;
    gap: 1.5rem;
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-link:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

/* Skills Section */
.skills {
    padding: 6rem 0;
    background: var(--bg-secondary);
    scroll-snap-align: start;
}

.skills-content {
    display: grid;
    gap: 3rem;
}

.skills-category {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition);
}

.skills-category:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.category-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.skills-grid {
    display: grid;
    gap: 1.5rem;
}

.skill-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.skill-name {
    font-weight: 500;
    color: var(--text-primary);
    min-width: 150px;
}

.skill-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

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

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.tool-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.tool-item:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.tool-item i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.tool-item:hover i {
    color: white;
}

.tool-item span {
    font-size: 0.875rem;
    font-weight: 500;
}

.certifications {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.6);
    position: relative;
    overflow: hidden;
}

.certifications::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.03) 0%, rgba(139, 92, 246, 0.02) 100%);
    pointer-events: none;
}

.cert-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    position: relative;
    z-index: 1;
}

.cert-category {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.8);
    position: relative;
    overflow: hidden;
}

.cert-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: var(--transition);
}

.cert-category:hover::before {
    transform: scaleY(1);
}

.cert-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.cert-category h4 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    padding-left: 1rem;
}

.cert-category h4::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.4);
}

.cert-list {
    display: grid;
    gap: 1rem;
}

.cert-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    background: var(--bg-primary);
    border-radius: 0.75rem;
    transition: var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.8);
    position: relative;
    overflow: hidden;
}

.cert-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    transition: left 0.5s ease;
}

.cert-item:hover::before {
    left: 100%;
}

.cert-item:hover {
    transform: translateX(5px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.cert-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cert-name::before {
    content: '🏆';
    font-size: 1.1rem;
    opacity: 0.7;
}

.cert-status {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: linear-gradient(135deg, var(--bg-secondary), var(--border-color));
    padding: 0.5rem 1rem;
    border-radius: 1.5rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.cert-item:hover .cert-status {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

/* Certification category icons */
.cert-category.cloud h4::before {
    background: linear-gradient(135deg, #0078d4, #00bcf2);
    box-shadow: 0 0 10px rgba(0, 120, 212, 0.4);
}

.cert-category.networking h4::before {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    box-shadow: 0 0 10px rgba(255, 107, 53, 0.4);
}

.cert-category.security h4::before {
    background: linear-gradient(135deg, #dc3545, #fd7e14);
    box-shadow: 0 0 10px rgba(220, 53, 69, 0.4);
}

/* Add subtle animations to cert items */
.cert-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.cert-item:nth-child(1) { animation-delay: 0.1s; }
.cert-item:nth-child(2) { animation-delay: 0.2s; }
.cert-item:nth-child(3) { animation-delay: 0.3s; }
.cert-item:nth-child(4) { animation-delay: 0.4s; }
.cert-item:nth-child(5) { animation-delay: 0.5s; }
.cert-item:nth-child(6) { animation-delay: 0.6s; }
.cert-item:nth-child(7) { animation-delay: 0.7s; }

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: var(--bg-primary);
    scroll-snap-align: start;
}

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

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.contact-icon i {
    color: white;
    font-size: 1.25rem;
}

.contact-details h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.contact-details p {
    color: var(--text-secondary);
}

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

.contact-details a:hover {
    color: var(--primary-dark);
}

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.6);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--bg-primary);
}

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

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    color: var(--text-primary);
    padding: 2rem 0;
}

[data-theme="dark"] .footer {
    background: var(--bg-dark);
    color: white;
    border-top: 1px solid var(--border);
}

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

.footer-left p {
    color: var(--text-secondary);
}

[data-theme="dark"] .footer-left p {
    color: var(--text-light);
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

[data-theme="dark"] .social-links a {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .social-links a:hover {
    background: var(--primary-color);
    color: white;
}

/* Animations */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%);
    }
    50% {
        transform: translateX(0%) translateY(0%);
    }
    100% {
        transform: translateX(100%) translateY(100%);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(102, 126, 234, 0.6);
    }
}

/* Scroll-triggered animations */
.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.fade-in-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* YouTube Channel Section */
.youtube-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(255, 0, 0, 0.05) 100%);
    position: relative;
    overflow: hidden;
    margin-top: 0;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    scroll-snap-align: start;
}

.youtube-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 0, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 0, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.youtube-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.youtube-info {
    animation: fadeInLeft 1s ease-out;
}

.youtube-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out;
}

.youtube-icon-container {
    width: 300px;
    height: 300px;
    background: var(--youtube);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 20px 40px rgba(255, 0, 0, 0.3);
    animation: float 6s ease-in-out infinite;
    transform: translateZ(0); /* Fix for parallax issues */
}

.youtube-icon-container::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: var(--youtube);
    border-radius: 50%;
    z-index: -1;
    animation: pulse 4s ease-in-out infinite;
}

.youtube-icon-container i {
    font-size: 6rem;
    color: white;
    animation: pulse 3s ease-in-out infinite;
}

.youtube-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--youtube);
}

.youtube-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.youtube-stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.youtube-stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.youtube-stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--youtube);
    margin-bottom: 0.5rem;
}

.youtube-stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.youtube-topics {
    margin-bottom: 2rem;
}

.youtube-topics h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.topics-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.topic-tag {
    background: var(--youtube);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.topic-tag:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

    [data-theme="dark"] .nav-menu {
        background-color: rgba(0, 0, 0, 0.95);
    }

    .nav-extras {
        position: fixed;
        top: 1rem;
        right: 4rem;
        z-index: 1001;
    }

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

    .nav-menu li {
        margin: 1rem 0;
    }

    .hamburger {
        display: flex;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        padding: 6rem 0 4rem;
    }

    .hero-container {
        padding: 0 1rem;
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
        width: 100%;
        margin: 0;
        padding: 0;
    }

    .hero-text {
        width: 100%;
        margin: 0;
        padding: 0;
    }

    .name {
        font-size: 2.5rem;
    }

    .hero-buttons {
        align-items: center;
        max-width: 100%;
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .button-row {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
        align-items: center;
    }

    .button-row .btn {
        width: 100%;
        max-width: 280px;
        align-self: center;
    }

    .youtube-button-full {
        max-width: 280px;
        align-self: center;
        width: 100%;
    }

    .hero-image {
        width: 100%;
        display: flex;
        justify-content: center;
        margin: 0;
        padding: 0;
    }

    .profile-photo {
        width: 300px;
        height: 300px;
    }

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

    .about {
        min-height: 100vh;
        padding: 4rem 0;
    }

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

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-dot {
        left: 11px;
    }

    .timeline-item {
        padding-left: 60px;
    }

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

    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

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

    /* Enhanced mobile responsive for certifications */
    .cert-categories {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .cert-category {
        padding: 1.5rem;
    }

    .cert-category h4 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .cert-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        padding: 1rem;
    }

    .cert-name {
        font-size: 0.9rem;
        line-height: 1.4;
    }

    .cert-status {
        align-self: flex-end;
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
    }

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

    .youtube-section {
        min-height: 100vh;
        padding: 4rem 0;
    }

    .youtube-icon-container {
        width: 200px;
        height: 200px;
    }

    .youtube-icon-container i {
        font-size: 4rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .hero {
        padding: 6rem 0 2rem;
        width: 100%;
        overflow-x: hidden;
    }

    .hero-container {
        padding: 0 0.5rem;
        width: 100%;
        max-width: 100vw;
    }

    .hero-content {
        width: 100%;
        margin: 0;
        padding: 0;
    }

    .hero-text {
        width: 100%;
        margin: 0;
        padding: 0;
    }

    .name {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
        width: 100%;
    }
    
    .button-row.primary-actions {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
        width: 100%;
    }
    
    .youtube-button-full {
        align-self: center;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
        max-width: 200px;
    }

    .hero-image {
        width: 100%;
        display: flex;
        justify-content: center;
        margin: 0;
        padding: 0;
    }

    .profile-photo {
        width: 250px;
        height: 250px;
    }
}

/* Smooth scrolling and performance optimizations */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.skill-progress {
    will-change: width;
}

.project-card,
.timeline-content,
.tool-item {
    will-change: transform;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.form-group input:focus,
.form-group textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading animation for images */
.profile-photo img {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.profile-photo img.loaded {
    opacity: 1;
}