.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-header::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #0066FF, #00D4FF);
    border-radius: 2px;
}

/* Improved Section Badge */
.section-badge {
    position: relative;
    padding-left: 30px;
}

.section-badge::before {
    content: '✦';
    position: absolute;
    left: 8px;
    color: #00D4FF;
    font-size: 16px;
}

/* Enhanced Stats */
.stat-item {
    position: relative;
    overflow: hidden;
}

.stat-item::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 0.6s;
}

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

.stat-icon {
    position: relative;
}

.stat-icon::after {
    content: '';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 20px;
    height: 20px;
    background: rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

/* Skills Category Enhancement */
.skills-category {
    position: relative;
    border-left: 4px solid transparent;
    transition: all 0.3s ease;
}

.skills-category:hover {
    border-left-color: #0066FF;
    transform: translateX(5px);
}

.category-header {
    position: relative;
    padding-left: 60px;
}

.category-header i {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 255, 0.1));
    border-radius: 12px;
    transition: all 0.3s ease;
}

.skills-category:hover .category-header i {
    background: linear-gradient(135deg, #0066FF, #00D4FF);
    color: white;
    transform: translateY(-50%) rotate(360deg);
}

/* Skill Icon với badge effect */
.skill-icon {
    position: relative;
}

.skill-icon::before {
    content: '';
    position: absolute;
    top: -3px;
    right: -3px;
    width: 8px;
    height: 8px;
    background: #00D4FF;
    border-radius: 50%;
    box-shadow: 0 0 10px #00D4FF;
}

/* Progress Bar Enhancement */
.progress-bar {
    position: relative;
    background: linear-gradient(90deg, 
        rgba(0, 102, 255, 0.05) 0%, 
        rgba(0, 212, 255, 0.05) 100%);
    border: 1px solid rgba(0, 102, 255, 0.1);
}

.skill-info h4 {
    display: flex;
    align-items: center;
    gap: 8px;
}

.skill-info h4::before {
    content: '▸';
    color: #0066FF;
    font-size: 14px;
}

/* Soft Skills Grid Enhancement */
.soft-skills h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 28px;
    margin-bottom: 40px;
}

.soft-skills h3 i {
    color: #0066FF;
    animation: brainPulse 3s ease-in-out infinite;
}

@keyframes brainPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.soft-skill-item {
    position: relative;
    cursor: pointer;
}

.soft-skill-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0), rgba(0, 212, 255, 0.1));
    border-radius: 15px;
    opacity: 0;
    transition: opacity 0.3s;
}

.soft-skill-item:hover::before {
    opacity: 1;
}

.soft-skill-item i {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 255, 0.1));
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.soft-skill-item:hover i {
    background: linear-gradient(135deg, #0066FF, #00D4FF);
    color: white;
    transform: rotateY(360deg);
}

/* Project Card Enhancement */
.project-card {
    position: relative;
    border: 1px solid rgba(0, 102, 255, 0.1);
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #0066FF, #00D4FF);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.project-card:hover::after {
    transform: scaleX(1);
}

/* Achievement Badge Enhancement */
.achievement-badge {
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
    animation: badgeFloat 3s ease-in-out infinite;
}

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

/* Button Enhancement */
.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn i {
    transition: transform 0.3s ease;
}

.btn:hover i {
    transform: translateX(5px);
}

.btn-primary i {
    animation: buttonIconPulse 2s ease-in-out infinite;
}

@keyframes buttonIconPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* Download CV Button Special Effect */
a[download] {
    position: relative;
}

a[download]::after {
    content: '📄';
    position: absolute;
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    opacity: 0;
    transition: all 0.3s ease;
}

a[download]:hover::after {
    right: -35px;
    opacity: 1;
}

/* Social Links Enhancement */
.social-links a {
    position: relative;
}

.social-links a::after {
    content: attr(title);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%) scale(0);
    background: rgba(0, 102, 255, 0.95);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    white-space: nowrap;
    pointer-events: none;
    transition: all 0.3s ease;
}

.social-links a:hover::after {
    transform: translateX(-50%) scale(1);
}

/* Filter Buttons Enhancement */
.filter-btn {
    position: relative;
}

.filter-btn::before {
    content: attr(data-filter);
    position: absolute;
    top: -5px;
    right: -5px;
    background: #0066FF;
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    opacity: 0;
    transition: opacity 0.3s;
}

.filter-btn.active::before {
    content: '✓';
    opacity: 1;
}

/* Contact Form Enhancement */
.form-group {
    position: relative;
}

.form-group label {
    position: absolute;
    top: -10px;
    left: 50px;
    background: var(--c);
    padding: 0 10px;
    color: var(--p);
    font-size: 12px;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s;
}

.form-group input:focus + label,
.form-group textarea:focus + label {
    opacity: 1;
}

/* Scroll Down Arrow Enhancement */
.scroll-down a {
    position: relative;
}

.scroll-down a::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 20px;
    background: linear-gradient(to bottom, transparent, #0066FF);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
}

/* Info Card Enhancement */
.info-card {
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}

.info-card:hover {
    border-left-color: #0066FF;
    background: linear-gradient(90deg, rgba(0, 102, 255, 0.05), transparent);
}

/* Responsive Improvements */
@media (max-width: 768px) {
    .category-header {
        padding-left: 0;
        flex-direction: column;
        text-align: center;
    }
    
    .category-header i {
        position: relative;
        transform: none;
        margin-bottom: 10px;
    }
    
    .soft-skills h3 {
        flex-direction: column;
    }
}

/* Loading State for Images */
img {
    background: linear-gradient(90deg, 
        rgba(0, 102, 255, 0.1) 0%, 
        rgba(0, 212, 255, 0.1) 50%, 
        rgba(0, 102, 255, 0.1) 100%);
    background-size: 200% 100%;
    animation: imageLoading 1.5s ease-in-out infinite;
}

img[src] {
    animation: none;
    background: none;
}

@keyframes imageLoading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-top,
    .scroll-down,
    .hero-buttons,
    .social-links,
    .projects-filter {
        display: none !important;
    }
    
    section {
        page-break-inside: avoid;
    }
}