:root {
    /* Light mode colors (default) */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #E9ECEF;
    --text-primary: #212529;
    --text-secondary: #6C757D;
    --accent-primary: #0056B3;
    --accent-secondary: #17A2B8;
    --success: #28a745;
    --warning: #ffc107;
    --border-radius: 8px;
    
    /* Transition for smooth theme switching */
    --transition-speed: 0.3s;
}

/* Dark mode colors */
[data-theme="dark"] {
    --bg-primary: #0A0E14;
    --bg-secondary: #151B23;
    --bg-tertiary: #1F2937;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --accent-primary: #3B82F6;
    --accent-secondary: #10B981;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Header & Navigation */
header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
    transition: top 0.3s, background-color var(--transition-speed) ease;
}

/* Light mode header */
:root header {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

/* Dark mode header */
[data-theme="dark"] header {
    background: rgba(21, 27, 35, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

nav ul li {
    margin: 0 15px;
    position: relative;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--accent-primary);
}

.btn-nav {
    background: var(--accent-primary);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-nav:hover {
    background: var(--accent-secondary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 122, 204, 0.3);
}

/* Theme Toggle Button */
.theme-toggle {
    margin-left: 20px;
}

.theme-toggle-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--accent-primary);
    border-radius: 50px;
    padding: 8px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-speed) ease;
    color: var(--text-primary);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.theme-toggle-btn:hover {
    background: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 86, 179, 0.3);
}

#theme-icon-light,
#theme-icon-dark {
    transition: opacity var(--transition-speed) ease;
}

[data-theme="dark"] #theme-icon-light {
    display: none;
}

[data-theme="dark"] #theme-icon-dark {
    display: inline;
}

:root #theme-icon-light {
    display: inline;
}

:root #theme-icon-dark {
    display: none;
}

/* Resume Dropdown */
.resume-dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: var(--bg-secondary);
    min-width: 180px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.5);
    border-radius: var(--border-radius);
    z-index: 1;
    margin-top: 5px;
}

.dropdown-content a {
    color: var(--text-secondary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    transition: all 0.3s;
}

.dropdown-content a:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
}

.resume-dropdown:hover .dropdown-content {
    display: block;
}

/* Hero Section */
#hero {
    position: relative;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-primary);
    overflow: hidden;
    margin-top: 60px;
    transition: background var(--transition-speed) ease;
}

/* Light mode hero gradient */
:root #hero {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
}

/* Dark mode hero gradient */
[data-theme="dark"] #hero {
    background: linear-gradient(135deg, #0A0E14 0%, #151B23 100%);
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

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

.hero-content h1 {
    font-size: 4rem;
    margin: 0;
    font-weight: 700;
    animation: fadeInDown 1s ease-in-out;
}

.hero-content .title {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin: 10px 0;
    animation: fadeInUp 1s ease-in-out 0.2s both;
}

.hero-content .tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin: 20px 0 40px;
    animation: fadeInUp 1s ease-in-out 0.4s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 40px;
    animation: fadeInUp 1s ease-in-out 0.6s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Sections */
section {
    padding: 80px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

section:nth-child(even) {
    background: var(--bg-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* About Section */
.about-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

.profile-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(0, 122, 204, 0.3);
    border: 3px solid var(--accent-primary);
}

.about-text {
    flex: 1;
}

/* Passion Statement */
.passion-statement {
    margin: 20px 0 30px 0;
    position: relative;
}

.passion-statement blockquote {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-left: 4px solid var(--accent-primary);
    margin: 0;
    padding: 25px 30px;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.passion-statement blockquote::before {
    content: '"';
    font-size: 4rem;
    color: var(--accent-primary);
    position: absolute;
    top: -10px;
    left: 15px;
    font-family: serif;
    opacity: 0.3;
}

.passion-statement blockquote p {
    margin: 0;
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 500;
}

.passion-statement blockquote p br {
    margin-bottom: 5px;
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.5rem;
    color: var(--text-primary);
}

/* Achievements Section */
#achievements {
    background: var(--bg-secondary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.achievement-card {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 122, 204, 0.3);
    border-color: var(--accent-primary);
}

.achievement-icon {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-primary);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(0, 122, 204, 0.3);
}

.achievement-content {
    flex: 1;
}

.achievement-content h3 {
    margin: 0 0 10px 0;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.achievement-stat {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin: 5px 0 10px 0;
    line-height: 1.2;
}

.achievement-content p:last-child {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Career Progression Timeline */
#career-timeline {
    background: var(--bg-primary);
}

.career-progression {
    position: relative;
    max-width: 900px;
    margin: 50px auto 0;
    padding: 20px 0;
}

.career-progression::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
    transform: translateX(-50%);
    z-index: 1;
}

.progression-item {
    display: flex;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.progression-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.progression-item:nth-child(odd) {
    flex-direction: row;
    text-align: right;
}

.progression-item:nth-child(even) {
    flex-direction: row-reverse;
    text-align: left;
}

.progression-item:nth-child(odd) .progression-content {
    margin-right: 80px;
}

.progression-item:nth-child(even) .progression-content {
    margin-left: 80px;
}

.progression-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
    box-shadow: 0 8px 25px rgba(0, 122, 204, 0.4);
    transition: all 0.3s ease;
}

.progression-item:hover .progression-icon {
    transform: scale(1.1);
    box-shadow: 0 12px 35px rgba(0, 122, 204, 0.6);
}

.progression-item.active .progression-icon {
    background: linear-gradient(135deg, var(--success), #20c997);
    animation: pulseActive 2s infinite;
}

@keyframes pulseActive {
    0%, 100% {
        box-shadow: 0 8px 25px rgba(0, 122, 204, 0.4);
    }
    50% {
        box-shadow: 0 8px 25px rgba(40, 167, 69, 0.6), 0 0 0 10px rgba(40, 167, 69, 0.1);
    }
}

.progression-content {
    flex: 1;
    max-width: 350px;
    background: var(--bg-tertiary);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    position: relative;
}

.progression-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    transform: translateY(-50%);
}

.progression-item:nth-child(odd) .progression-content::before {
    right: -20px;
    border-left-color: var(--bg-tertiary);
}

.progression-item:nth-child(even) .progression-content::before {
    left: -20px;
    border-right-color: var(--bg-tertiary);
}

.progression-item:hover .progression-content {
    background: var(--bg-secondary);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 122, 204, 0.3);
}

.progression-content h3 {
    color: var(--accent-primary);
    margin: 0 0 8px 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.progression-period {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0 0 12px 0;
    opacity: 0.8;
}

.progression-content p:last-child {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Future Opportunity Styling */
.future-opportunity {
    animation: futureGlow 3s ease-in-out infinite;
}

@keyframes futureGlow {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-3px);
    }
}

.future-icon {
    background: linear-gradient(135deg, #ff6b35, #f7931e, #ffd700) !important;
    animation: futureIconPulse 2.5s ease-in-out infinite;
}

@keyframes futureIconPulse {
    0%, 100% {
        box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 12px 35px rgba(255, 107, 53, 0.7), 0 0 0 15px rgba(255, 107, 53, 0.1);
        transform: scale(1.05);
    }
}

.future-content {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(255, 107, 53, 0.1) 100%) !important;
    border: 2px solid rgba(255, 107, 53, 0.3);
    position: relative;
    overflow: hidden;
}

.future-content::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 107, 53, 0.1), transparent);
    animation: shimmer 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.future-content h3 {
    color: #ff6b35 !important;
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.future-cta {
    margin-top: 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.future-btn {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: var(--text-primary);
    padding: 15px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
    border: none;
    cursor: pointer;
}

.future-btn:hover {
    background: linear-gradient(135deg, #f7931e, #ffd700);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.5);
    color: var(--text-primary);
}

.future-btn i {
    font-size: 1.1rem;
    animation: handshake 2s ease-in-out infinite;
}

@keyframes handshake {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-10deg);
    }
    75% {
        transform: rotate(10deg);
    }
}

.future-subtitle {
    margin: 12px 0 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    opacity: 0.9;
}

.future-opportunity .progression-content strong {
    color: #ff6b35;
    font-weight: 600;
}

/* Modern Technology Leadership Section */
#modern-approach {
    background: var(--bg-primary);
}

.modern-approach-content {
    text-align: center;
}

.approach-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.approach-card {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid transparent;
}

.approach-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 86, 179, 0.2);
    border-color: var(--accent-primary);
}

[data-theme="dark"] .approach-card:hover {
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

.approach-icon {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-primary);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 20px;
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.3);
}

[data-theme="dark"] .approach-icon {
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.approach-content h3 {
    color: var(--accent-primary);
    margin: 0 0 15px 0;
    font-size: 1.3rem;
}

.approach-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    text-align: left;
}

.approach-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.approach-philosophy {
    max-width: 700px;
    margin: 50px auto 0;
}

.approach-philosophy blockquote {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-left: 4px solid var(--accent-primary);
    margin: 0;
    padding: 30px;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    font-style: italic;
}

[data-theme="dark"] .approach-philosophy blockquote {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.approach-philosophy blockquote::before {
    content: '"';
    font-size: 4rem;
    color: var(--accent-primary);
    position: absolute;
    top: -10px;
    left: 15px;
    font-family: serif;
    opacity: 0.3;
}

.approach-philosophy blockquote p {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 500;
    text-align: center;
}

/* Timeline */
.timeline {
    position: relative;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: var(--accent-primary);
}

.timeline-item {
    margin-left: 40px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 5px;
    width: 20px;
    height: 20px;
    background: var(--bg-primary);
    border: 4px solid var(--accent-primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content {
    background: var(--bg-tertiary);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s, box-shadow 0.3s, background-color var(--transition-speed) ease;
}

/* Light mode shadows */
:root .timeline-content,
:root .skill-group,
:root .project-card,
:root .achievement-card,
:root .education-section,
:root .certification-section,
:root .contact-info {
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

/* Dark mode shadows */
[data-theme="dark"] .timeline-content,
[data-theme="dark"] .skill-group,
[data-theme="dark"] .project-card,
[data-theme="dark"] .achievement-card,
[data-theme="dark"] .education-section,
[data-theme="dark"] .certification-section,
[data-theme="dark"] .contact-info {
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: 0 6px 30px rgba(0, 122, 204, 0.2);
}

.timeline-content h3 {
    color: var(--accent-primary);
    margin-top: 0;
}

.timeline-content p {
    color: var(--text-secondary);
}

.timeline-content ul {
    color: var(--text-secondary);
}

.timeline-content ul li {
    margin-bottom: 10px;
}

.company-logo {
    width: 150px;
    height: 45px;
    margin-right: 15px;
    vertical-align: middle;
    filter: brightness(0.9);
    transition: all 0.3s ease;
    padding: 8px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    border: 2px solid rgba(0, 122, 204, 0.4);
    object-fit: contain;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.timeline-content:hover .company-logo {
    filter: brightness(1.3);
    transform: scale(1.15);
    background: rgba(0, 122, 204, 0.2);
    border-color: var(--accent-primary);
    box-shadow: 0 6px 20px rgba(0, 122, 204, 0.4);
}

/* Special styling for SVG logos */
.company-logo[class*="svg"],
svg.company-logo {
    width: 175px;
    height: 50px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
}

.timeline-content:hover svg.company-logo {
    background: rgba(0, 122, 204, 0.2);
}

/* White background for specific company logos */
.company-logo.white-bg {
    background: rgba(255, 255, 255, 0.95) !important;
    border: 2px solid rgba(0, 122, 204, 0.3);
}

/* Dark background for logos in light mode */
:root .company-logo.dark-bg {
    background: rgba(33, 37, 41, 0.95) !important;
    border: 2px solid rgba(0, 86, 179, 0.3);
}

[data-theme="dark"] .company-logo.dark-bg {
    background: rgba(255, 255, 255, 0.15) !important;
    border: 2px solid rgba(59, 130, 246, 0.4);
}

.timeline-content:hover .company-logo.white-bg {
    background: rgba(255, 255, 255, 1) !important;
    border-color: var(--accent-primary);
    box-shadow: 0 6px 20px rgba(0, 122, 204, 0.4);
}

/* Enhanced Job Header Layout */
.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    gap: 20px;
}

.job-info {
    flex: 1;
}

.job-info h3 {
    margin: 0 0 8px 0;
    color: var(--accent-primary);
    font-size: 1.3rem;
}

.job-duration {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

.company-logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 200px;
}

.company-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 500;
    line-height: 1.2;
}

.timeline-content:hover .company-name {
    color: var(--accent-primary);
}

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.skill-group {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.skill-group:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 122, 204, 0.2);
}

.skill-group h3 {
    color: var(--accent-primary);
    margin-top: 0;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.3rem;
}

/* Skills with Dots and Tooltips */
.skill-group h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-group h3 i {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
}

.skill-item:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0, 122, 204, 0.2);
}

.skill-name {
    flex: 1;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.skill-dots {
    display: flex;
    gap: 4px;
    margin: 0 15px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--text-secondary);
    transition: all 0.3s;
}

.dot.filled {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 8px rgba(0, 122, 204, 0.4);
}

.skill-years {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 70px;
    text-align: right;
}

/* Tooltip */
.skill-item::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.4;
    white-space: nowrap;
    max-width: 300px;
    white-space: normal;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    border: 1px solid var(--accent-primary);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 1000;
    pointer-events: none;
}

.skill-item::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-2px);
    border: 6px solid transparent;
    border-top-color: var(--accent-primary);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 1001;
}

.skill-item:hover::after,
.skill-item:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

.skill-item:hover::before {
    transform: translateX(-50%) translateY(3px);
}

/* Animation for dots filling */
.skill-item:hover .dot.filled {
    animation: dotPulse 0.6s ease-in-out;
}

@keyframes dotPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); box-shadow: 0 0 15px rgba(0, 122, 204, 0.8); }
    100% { transform: scale(1); }
}

/* Projects Section */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.project-card {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: all 0.3s;
    border: 1px solid transparent;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 122, 204, 0.3);
    border-color: var(--accent-primary);
}

.project-card h3 {
    color: var(--accent-primary);
    margin-top: 0;
}

.project-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

/* Certifications Section */
.cert-education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 50px;
}

.education-section,
.certification-section {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.education-section h3,
.certification-section h3 {
    color: var(--accent-primary);
    margin-top: 0;
    text-align: center;
}

.education-item,
.certification-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--bg-secondary);
}

.education-item:last-child,
.certification-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.education-item h4,
.certification-item h4 {
    color: var(--text-primary);
    margin: 0 0 5px 0;
}

.education-item p,
.certification-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* Contact Section */
#contact {
    text-align: center;
    background: var(--bg-primary);
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    background: var(--bg-tertiary);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.contact-info p {
    margin: 15px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.contact-info i {
    width: 30px;
    color: var(--accent-primary);
    margin-right: 10px;
}

.contact-info a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* Buttons */
.btn {
    background: var(--accent-primary);
    color: var(--text-primary);
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
    margin-top: 20px;
    font-weight: 500;
}

.btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 122, 204, 0.3);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-top: 1px solid var(--bg-tertiary);
}

/* Animations */
@keyframes fadeInDown {
    from { 
        opacity: 0; 
        transform: translateY(-20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

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

@keyframes dotFillIn {
    0% { 
        transform: scale(0);
        opacity: 0;
    }
    50% { 
        transform: scale(1.3);
        box-shadow: 0 0 20px rgba(0, 122, 204, 0.8);
    }
    100% { 
        transform: scale(1);
        opacity: 1;
        box-shadow: 0 0 8px rgba(0, 122, 204, 0.4);
    }
}

/* Accessibility & Focus Styles */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.btn:focus,
.btn-nav:focus {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

.skill-item:focus {
    background: var(--bg-primary);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(0, 122, 204, 0.4);
}

.skill-item:focus::after,
.skill-item:focus::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

.skill-item:focus::before {
    transform: translateX(-50%) translateY(3px);
}

/* Skip to main content */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-primary);
    color: var(--text-primary);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
}

.skip-link:focus {
    top: 6px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1a1a1a;
        --bg-tertiary: #333333;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --accent-primary: #00aaff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .skill-item:hover::after,
    .skill-item:hover::before {
        transition: none;
    }
}

/* Print styles */
@media print {
    header,
    #particles-js,
    .btn,
    .btn-nav {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    section {
        page-break-inside: avoid;
        opacity: 1 !important;
        transform: none !important;
    }
    
    .hero-content h1 {
        color: black !important;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content .title {
        font-size: 1.2rem;
    }
    
    .hero-content .tagline {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-container {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .profile-photo {
        width: 150px;
        height: 150px;
    }
    
    .cert-education-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .approach-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .approach-card {
        padding: 25px;
        text-align: center;
    }
    
    .approach-content p {
        text-align: center;
    }
    
    .approach-philosophy blockquote {
        padding: 20px;
    }
    
    .achievement-card {
        padding: 20px;
        gap: 15px;
    }
    
    .achievement-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .achievement-stat {
        font-size: 1.5rem;
    }
    
    .skill-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .skill-dots {
        margin: 0;
    }
    
    .skill-years {
        text-align: left;
        min-width: auto;
    }
    
    /* Mobile tooltip adjustments */
    .skill-item::after {
        position: fixed;
        bottom: 20px;
        left: 20px;
        right: 20px;
        top: auto;
        transform: none;
        max-width: none;
        font-size: 0.8rem;
    }
    
    .skill-item::before {
        display: none;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 8px;
    }
    
    .theme-toggle {
        margin-left: 10px;
    }
    
    .theme-toggle-btn {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .dropdown-content {
        position: fixed;
        right: 10px;
        left: auto;
        min-width: 160px;
    }
    
    .contact-info {
        padding: 25px;
    }
    
    .contact-info p {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    
    .contact-info i {
        margin-bottom: 5px;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 15px;
    }
    
    /* Career progression mobile adjustments */
    .career-progression::before {
        left: 30px;
    }
    
    .progression-item {
        flex-direction: column !important;
        text-align: center !important;
        margin-left: 60px;
    }
    
    .progression-item:nth-child(odd) .progression-content,
    .progression-item:nth-child(even) .progression-content {
        margin: 20px 0 0 0;
        max-width: none;
    }
    
    .progression-content::before {
        display: none;
    }
    
    .progression-icon {
        width: 60px;
        height: 60px;
        font-size: 1.4rem;
        position: absolute;
        left: -90px;
        top: 0;
    }
    
    .future-btn {
        font-size: 0.9rem;
        padding: 12px 20px;
    }
    
    .future-opportunity {
        margin-bottom: 40px;
    }
    
    /* Mobile job header adjustments */
    .job-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .company-logo-container {
        flex-direction: row;
        align-items: center;
        min-width: auto;
        gap: 12px;
    }
    
    .company-logo {
        width: 120px !important;
        height: 38px !important;
    }
    
    svg.company-logo {
        width: 140px !important;
        height: 40px !important;
    }
    
    .company-name {
        text-align: left;
        font-size: 0.9rem;
    }
}