/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    /* Chemical Engineering Colors */
    --chem-primary: #dc2626;
    --chem-secondary: #ea580c;
    --chem-light: #fef2f2;
    
    /* IT Colors */
    --it-primary: #2563eb;
    --it-secondary: #7c3aed;
    --it-light: #eff6ff;
    
    /* Other Variables */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --font-family: 'Inter', sans-serif;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    
    --chem-light: rgba(220, 38, 38, 0.1);
    --it-light: rgba(37, 99, 235, 0.1);
}

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

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

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

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

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

.theme-toggle,
.mobile-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.theme-toggle:hover,
.mobile-toggle:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.mobile-toggle {
    display: none;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    opacity: 0.1;
}

.molecule {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--chem-primary) 2px, transparent 2px);
    background-size: 20px 20px;
    transform: rotate(45deg);
    animation: float 6s ease-in-out infinite;
}

.circuit {
    position: absolute;
    bottom: 10%;
    right: 10%;
    width: 250px;
    height: 250px;
    background: 
        linear-gradient(90deg, var(--it-primary) 2px, transparent 2px),
        linear-gradient(var(--it-primary) 2px, transparent 2px);
    background-size: 25px 25px;
    animation: float 8s ease-in-out infinite reverse;
}

.floating-elements {
    position: absolute;
    inset: 0;
}

.element {
    position: absolute;
    font-size: 2rem;
    animation: float 10s ease-in-out infinite;
}

.element-1 {
    top: 20%;
    left: 80%;
    animation-delay: -2s;
}

.element-2 {
    top: 70%;
    left: 15%;
    animation-delay: -4s;
}

.element-3 {
    top: 30%;
    right: 20%;
    animation-delay: -6s;
}

.element-4 {
    bottom: 20%;
    right: 60%;
    animation-delay: -8s;
}

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

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 1200px;
    padding: 3rem 2rem;
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 4rem;
    justify-content: center;
    flex-wrap: wrap;
}

.profile-image-container {
    position: relative;
    flex-shrink: 0;
}

.profile-image-wrapper {
    position: relative;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: all 0.4s ease;
}

.profile-image-wrapper:hover .profile-image {
    transform: scale(1.1);
}

.profile-ring {
    position: absolute;
    top: -12px;
    left: -12px;
    right: -12px;
    bottom: -12px;
    border: 4px solid transparent;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color), var(--primary-color));
    background-size: 400% 400%;
    animation: gradientShift 3s ease infinite;
    z-index: -1;
}

.profile-glow {
    position: absolute;
    top: -30px;
    left: -30px;
    right: -30px;
    bottom: -30px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
    animation: pulse 2s ease-in-out infinite;
    z-index: -2;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.profile-info {
    flex: 1;
    min-width: 350px;
    text-align: left;
}

/* Profile Image Status Indicator */
.profile-image-container::after {
    content: '';
    position: absolute;
    bottom: 15px;
    right: 15px;
    width: 25px;
    height: 25px;
    background: var(--success-color);
    border: 4px solid var(--bg-card);
    border-radius: 50%;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(16, 185, 129, 0);
    }
}

/* Enhanced Profile Image Hover Effects */
.profile-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.profile-image-wrapper:hover::before {
    opacity: 1;
}

/* Additional Profile Photo Enhancements */
.profile-image-container {
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
}

.profile-image-wrapper {
    position: relative;
    background: linear-gradient(45deg, #f0f9ff, #e0f2fe);
    padding: 4px;
}

.profile-image-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 2;
}

.profile-image-wrapper:hover::after {
    opacity: 1;
}

/* Floating particles around profile image */
.profile-image-container::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    right: -50px;
    bottom: -50px;
    background: 
        radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    z-index: -3;
}

/* Enhanced hover animations */
.profile-image-wrapper:hover {
    animation: profilePulse 0.6s ease-in-out;
}

@keyframes profilePulse {
    0%, 100% {
        transform: scale(1.05);
    }
    50% {
        transform: scale(1.08);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

.cta-button.primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.cta-button.primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.cta-button.secondary:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border: 2px solid var(--primary-color);
    border-left: none;
    border-top: none;
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0) rotate(45deg);
    }
    40% {
        transform: translateX(-50%) translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateX(-50%) translateY(-5px) rotate(45deg);
    }
}

/* Section Styles */
.section {
    padding: 80px 0;
    transition: var(--transition);
}

.bg-alternate {
    background: var(--bg-secondary);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* About Section */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.7;
}

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

.identity-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.identity-card.chemical {
    border-left: 4px solid var(--chem-primary);
}

.identity-card.it {
    border-left: 4px solid var(--it-primary);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.card-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-content ul {
    list-style: none;
    padding: 0;
}

.card-content li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.card-content li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* Enhanced Project Cards */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.project-card.chemical-project {
    border-left: 4px solid var(--chem-primary);
}

.project-card.it-project {
    border-left: 4px solid var(--it-primary);
}

.project-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    transition: var(--transition);
}

.chemical-project .project-icon {
    background: linear-gradient(135deg, var(--chem-light), rgba(220, 38, 38, 0.1));
    color: var(--chem-primary);
}

.it-project .project-icon {
    background: linear-gradient(135deg, var(--it-light), rgba(37, 99, 235, 0.1));
    color: var(--it-primary);
}

.project-card:hover .project-icon {
    transform: scale(1.1) rotate(5deg);
}

.project-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

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

.tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.chemical-project .tag {
    background: var(--chem-light);
    color: var(--chem-primary);
}

.it-project .tag {
    background: var(--it-light);
    color: var(--it-primary);
}

/* Enhanced Volunteering Section */
.volunteering-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.volunteer-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.volunteer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.volunteer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.volunteer-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    color: white;
    transition: var(--transition);
}

.volunteer-card:hover .volunteer-icon {
    transform: scale(1.1) rotate(-5deg);
}

.volunteer-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.volunteer-role {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.volunteer-card p:last-child {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Enhanced Achievements Section */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
    transition: all 0.5s ease;
}

.achievements-grid.single-expanded {
    grid-template-columns: 1fr;
}

.achievements-grid.single-expanded .achievement-card:not(.expanded) {
    display: none;
}

.achievement-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.achievement-card.expanded {
    padding: 2rem;
    grid-column: 1 / -1;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.achievement-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.achievement-card.competition {
    border-left: 4px solid var(--accent-color);
}

.achievement-card.initiative {
    border-left: 4px solid var(--success-color);
}

.achievement-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.achievement-badge {
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: white;
}

.achievement-badge.ongoing {
    background: linear-gradient(135deg, #0bf574, #2dd906);
}

.achievement-badge.top-10 {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.achievement-badge.top-20 {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.achievement-year {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--bg-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
}

.achievement-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    transition: var(--transition);
}

.achievement-card:hover .achievement-icon {
    transform: scale(1.1) rotate(10deg);
}

.achievement-content {
    text-align: left;
}

.competition-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.achievement-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.project-highlight {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-left: 3px solid var(--primary-color);
}

.project-highlight h4 {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-highlight p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.achievement-details {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: var(--bg-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
}

.detail-item i {
    color: var(--primary-color);
    font-size: 0.8rem;
    width: 14px;
    text-align: center;
}

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

.skills-used .skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.skills-used .skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Read More Functionality */
.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out;
    margin-top: 1.5rem;
}

.expandable-content.expanded {
    max-height: 2000px;
}

.read-more-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    width: 100%;
    justify-content: center;
}

.read-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.read-more-btn.expanded {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

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

.read-more-btn.expanded i {
    transform: rotate(180deg);
}

/* Full Description Styling */
.full-description {
    margin-bottom: 2rem;
}

.full-description h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    margin-top: 1.5rem;
}

.full-description h4:first-child {
    margin-top: 0;
}

.full-description p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* Contributors Styling */
.contributors {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.contributor {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.contributor:last-child {
    border-bottom: none;
}

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

/* Project Gallery Styling */
.project-gallery {
    margin-top: 2rem;
}

.project-gallery h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Image Support for Achievements */
.achievement-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.achievement-card:hover .achievement-image {
    transform: scale(1.02);
}

.achievement-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.achievement-gallery img {
    width: 100%;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
}

.achievement-gallery img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* Enhanced Achievement Animations */
.achievement-card {
    opacity: 0;
    transform: translateY(50px);
    animation: slideInUp 0.6s ease forwards;
}

.achievement-card:nth-child(1) { animation-delay: 0.1s; }
.achievement-card:nth-child(2) { animation-delay: 0.2s; }
.achievement-card:nth-child(3) { animation-delay: 0.3s; }

/* Modern Education Section */
.education-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.education-category {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.education-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.category-title i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.education-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.education-card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.education-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.education-card.current {
    border-left: 4px solid var(--success-color);
}

.education-card.achievement {
    border-left: 4px solid var(--accent-color);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.degree-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.education-card.current .degree-icon {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
}

.education-card.achievement .degree-icon {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
}

.education-card:hover .degree-icon {
    transform: scale(1.1) rotate(5deg);
}

.degree-info {
    flex: 1;
}

.degree-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.institution {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.status-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.status-badge.current {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
}

.achievement-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.card-body {
    margin-top: 1rem;
}

.duration {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.duration i {
    color: var(--primary-color);
}

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

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

.specialization-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.achievement-details {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.achievement-item i {
    color: var(--accent-color);
    font-size: 0.9rem;
    width: 16px;
    text-align: center;
}

/* Enhanced Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-category {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.category-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Enhanced Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

/* Contact Form Section */
.contact-form-section {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.contact-form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.form-container {
    position: relative;
    z-index: 2;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-size: 1rem;
    z-index: 2;
    transition: var(--transition);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    transform: translateY(-2px);
}

.form-input:focus + .input-icon,
.form-textarea:focus + .input-icon {
    color: var(--primary-color);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-family);
    line-height: 1.6;
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    margin-top: 1rem;
}

.submit-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;
}

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

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.btn-icon {
    transition: transform 0.3s ease;
}

.submit-btn:hover .btn-icon {
    transform: translateX(3px);
}

/* Form Validation States */
.form-input:invalid:not(:placeholder-shown),
.form-textarea:invalid:not(:placeholder-shown) {
    border-color: var(--danger-color);
}

.form-input:valid:not(:placeholder-shown),
.form-textarea:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

/* Form Animation */
.form-group {
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.6s ease forwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.contact-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.contact-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.contact-graphic {
    position: relative;
    width: 200px;
    height: 200px;
}

.graphic-element {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: float 3s ease-in-out infinite;
}

.graphic-element.chem {
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, var(--chem-primary), var(--chem-secondary));
    color: white;
}

.graphic-element.it {
    bottom: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--it-primary), var(--it-secondary));
    color: white;
}

.connection-line {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--chem-primary), var(--it-primary));
    transform: translate(-50%, -50%) rotate(45deg);
    border-radius: 1px;
}

.footer {
        background-color: rgb(7, 0, 37);   /* Black background */
        color: white;              /* White text for contrast */
        text-align: center;        /* Center the text */
        padding: 15px 0;           /* Some spacing inside */
        bottom: 0;
        width: 100%;               /* Full width */
}

.footer p {
        margin: 0; /* Remove default margin */
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-card);
        flex-direction: column;
        justify-content: flex-start;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

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

    .mobile-toggle {
        display: block;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .profile-section {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .profile-info {
        text-align: center;
        min-width: auto;
    }

    .profile-image-wrapper {
        width: 200px;
        height: 200px;
    }

    .dual-identity {
        grid-template-columns: 1fr;
    }

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

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

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

    .achievements-grid.single-expanded {
        grid-template-columns: 1fr;
    }

    .achievement-card {
        padding: 1.5rem;
    }

    .achievement-details {
        flex-direction: column;
        gap: 0.5rem;
    }

    .detail-item {
        font-size: 0.85rem;
        padding: 0.3rem 0.6rem;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .contact-form-section {
        padding: 2rem;
    }

    .form-header h3 {
        font-size: 1.5rem;
    }

    .form-input,
    .form-textarea {
        padding: 0.8rem 0.8rem 0.8rem 2.5rem;
    }

    .input-icon {
        left: 0.8rem;
        font-size: 0.9rem;
    }

    .education-cards {
        grid-template-columns: 1fr;
    }

    .education-category {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .section {
        padding: 60px 0;
    }

    .project-card,
    .volunteer-card,
    .achievement-card,
    .skill-category {
        padding: 1.5rem;
    }

    .hero-content {
        padding: 2rem 1rem;
    }

    .profile-image-wrapper {
        width: 180px;
        height: 180px;
    }

    .profile-section {
        gap: 2rem;
    }

    .profile-ring {
        top: -8px;
        left: -8px;
        right: -8px;
        bottom: -8px;
        border-width: 3px;
    }

    .profile-glow {
        top: -20px;
        left: -20px;
        right: -20px;
        bottom: -20px;
    }

    .profile-image-container::after {
        bottom: 10px;
        right: 10px;
        width: 20px;
        height: 20px;
        border-width: 3px;
    }

    .education-card {
        padding: 1.5rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .status-badge,
    .achievement-badge {
        align-self: flex-start;
    }

    .specializations {
        gap: 0.3rem;
    }

    .specialization-tag {
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
    }

    .competition-name {
        font-size: 1.2rem;
    }

    .achievement-description {
        font-size: 0.9rem;
    }

    .skills-used .skill-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .achievement-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .achievement-badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .read-more-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }

    .full-description h4 {
        font-size: 1rem;
    }

    .full-description p {
        font-size: 0.9rem;
    }

    .contributors {
        padding: 1rem;
    }

    .contributor {
        font-size: 0.85rem;
    }

    .achievement-gallery {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 0.3rem;
    }

    .achievement-gallery img {
        height: 80px;
    }

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

    .form-header h3 {
        font-size: 1.3rem;
    }

    .form-header p {
        font-size: 0.9rem;
    }

    .form-input,
    .form-textarea {
        padding: 0.7rem 0.7rem 0.7rem 2.2rem;
        font-size: 0.9rem;
    }

    .input-icon {
        left: 0.7rem;
        font-size: 0.8rem;
    }

    .submit-btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Medium screens - 2 columns */
@media (max-width: 1024px) and (min-width: 769px) {
    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Additional Modern UI Enhancements */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

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

/* Enhanced Button Styles */
.cta-button {
    position: relative;
    overflow: hidden;
}

.cta-button::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;
}

.cta-button:hover::before {
    left: 100%;
}

/* Enhanced Card Animations */
.project-card,
.volunteer-card,
.achievement-card,
.skill-category {
    opacity: 0;
    transform: translateY(50px);
    animation: slideInUp 0.6s ease forwards;
}

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

.volunteer-card:nth-child(1) { animation-delay: 0.1s; }
.volunteer-card:nth-child(2) { animation-delay: 0.2s; }
.volunteer-card:nth-child(3) { animation-delay: 0.3s; }
.volunteer-card:nth-child(4) { animation-delay: 0.4s; }

.achievement-card:nth-child(1) { animation-delay: 0.1s; }
.achievement-card:nth-child(2) { animation-delay: 0.2s; }
.achievement-card:nth-child(3) { animation-delay: 0.3s; }

.skill-category:nth-child(1) { animation-delay: 0.1s; }
.skill-category:nth-child(2) { animation-delay: 0.2s; }
.skill-category:nth-child(3) { animation-delay: 0.3s; }

.education-category:nth-child(1) { animation-delay: 0.1s; }
.education-category:nth-child(2) { animation-delay: 0.2s; }

.education-card:nth-child(1) { animation-delay: 0.1s; }
.education-card:nth-child(2) { animation-delay: 0.2s; }

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

/* Enhanced Scroll Indicator */
.scroll-indicator {
    animation: bounce 2s infinite;
}

/* Loading Animation for Cards */
.card-loading {
    position: relative;
    overflow: hidden;
}

.card-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Enhanced Typography */
.section-title {
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* Enhanced Focus States */
.cta-button:focus,
.skill-tag:focus,
.contact-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Smooth Transitions for Theme Changes */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Enhanced Mobile Experience */
@media (max-width: 768px) {
    .project-card,
    .volunteer-card,
    .achievement-card,
    .skill-category {
        animation-delay: 0s !important;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* Certifications Section Styles */
/* Add this CSS to your style.css file */

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

.certificate-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateY(50px);
    animation: slideInUp 0.6s ease forwards;
}

.certificate-card:nth-child(1) { animation-delay: 0.1s; }
.certificate-card:nth-child(2) { animation-delay: 0.2s; }
.certificate-card:nth-child(3) { animation-delay: 0.3s; }
.certificate-card:nth-child(4) { animation-delay: 0.4s; }

.certificate-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.certificate-image-container {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.certificate-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.certificate-card:hover .certificate-image {
    transform: scale(1.1);
}

.certificate-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.certificate-image-container:hover .certificate-overlay {
    opacity: 1;
}

.certificate-overlay i {
    font-size: 2.5rem;
    color: white;
    transition: transform 0.3s ease;
}

.certificate-image-container:hover .certificate-overlay i {
    transform: scale(1.2);
}

.certificate-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

.certificate-badge {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-top: -50px;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
    transition: transform 0.3s ease;
}

.certificate-card:hover .certificate-badge {
    transform: rotate(10deg) scale(1.1);
}

.certificate-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

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

.certificate-provider i {
    font-size: 1.2rem;
}

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

.certificate-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border-left: 3px solid var(--primary-color);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-item i {
    color: var(--primary-color);
    width: 16px;
    text-align: center;
}

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

.cert-skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.cert-skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.certificate-actions {
    display: flex;
    gap: 0.8rem;
    margin-top: auto;
    padding-top: 1rem;
}

.cert-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.cert-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.cert-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.cert-btn.secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.cert-btn.secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Certificate Modal/Lightbox (Optional Enhancement) */
.certificate-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.certificate-modal.active {
    display: flex;
}

.certificate-modal-content {
    max-width: 90%;
    max-height: 90%;
    position: relative;
}

.certificate-modal-content img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.certificate-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: white;
    color: var(--text-primary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.certificate-modal-close:hover {
    background: var(--danger-color);
    color: white;
    transform: rotate(90deg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .certificate-image-container {
        height: 200px;
    }

    .certificate-content {
        padding: 1.5rem;
    }

    .certificate-actions {
        flex-direction: column;
    }

    .cert-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .certificate-card {
        border-radius: 16px;
    }

    .certificate-image-container {
        height: 180px;
    }

    .certificate-content {
        padding: 1.2rem;
    }

    .certificate-title {
        font-size: 1.1rem;
    }

    .certificate-description {
        font-size: 0.9rem;
    }

    .certificate-badge {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
        margin-top: -40px;
    }

    .meta-item {
        font-size: 0.85rem;
    }

    .cert-skill-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .cert-btn {
        padding: 0.7rem 1rem;
        font-size: 0.85rem;
    }
}