:root {
    /* Light theme variables */
    --light-primary: #2563eb;
    --light-primary-dark: #1d4ed8;
    --light-secondary: #6366f1;
    --light-dark: #1e293b;
    --light-light: #f8fafc;
    --light-gray: #64748b;
    --light-gray-light: #e2e8f0;
    --light-card-bg: #ffffff;
    --light-input-bg: #ffffff;
    
    /* Dark theme variables */
    --dark-primary: #3b82f6;
    --dark-primary-dark: #2563eb;
    --dark-secondary: #818cf8;
    --dark-dark: #f8fafc;
    --dark-light: #0f172a;
    --dark-gray: #cbd5e1;   /* Lighter gray for better contrast on dark backgrounds */
    --dark-gray-light: #334155;
    --dark-card-bg: #1e293b; /* Slightly lighter than background for cards */
    --dark-input-bg: #1e293b;
    
    /* Default theme (dark) */
    --primary: var(--dark-primary);
    --primary-dark: var(--dark-primary-dark);
    --secondary: var(--dark-secondary);
    --dark: var(--dark-dark);
    --light: var(--dark-light);
    --gray: var(--dark-gray);
    --gray-light: var(--dark-gray-light);
    --card-bg: var(--dark-card-bg);
    --input-bg: var(--dark-input-bg);
}

/* Class for light theme */
.light-theme {
    --primary: var(--light-primary);
    --primary-dark: var(--light-primary-dark);
    --secondary: var(--light-secondary);
    --dark: var(--light-dark);
    --light: var(--light-light);
    --gray: var(--light-gray);
    --gray-light: var(--light-gray-light);
    --card-bg: var(--light-card-bg);
    --input-bg: var(--light-input-bg);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1:hover, h2:hover, h3:hover, h4:hover {
    transition: text-shadow 0.3s ease-in-out, color 0.3s ease-in-out;
}

/* Dark theme hover effects (default) */
h1:hover, h2:hover, h3:hover, h4:hover {
    color: #fff;
    text-shadow: 
        0 0 5px rgba(255, 255, 255, 0.6),
        0 0 10px rgba(255, 255, 255, 0.45),
        0 0 15px rgba(255, 255, 255, 0.3);
}

/* Light theme hover effects */
.light-theme h1:hover, 
.light-theme h2:hover, 
.light-theme h3:hover, 
.light-theme h4:hover {
    color: var(--dark);
    text-shadow: 
        0 0 5px rgba(30, 41, 59, 0.6),
        0 0 10px rgba(30, 41, 59, 0.45),
        0 0 15px rgba(30, 41, 59, 0.3);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.navbar {
    background-color: var(--light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: background-color 0.3s;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
}

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

.logo span {
    color: var(--accent);
}

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

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

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

.theme-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-switch-checkbox {
    opacity: 0;
    position: absolute;
}

.theme-switch-label {
    width: 45px;
    height: 22px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50px;
    position: relative;
    cursor: pointer;
    display: inline-block;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.theme-switch-label:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.theme-switch-label::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: black;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}

.theme-switch-checkbox:checked + .theme-switch-label::after {
    transform: translateX(23px);
    background-color: white;
}

.theme-switch-icon {
    color: var(--dark);
    font-size: 0.8rem;
}

/* Mobile menu button (hidden on larger screens) */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.mobile-menu-toggle .bar {
    height: 3px;
    width: 100%;
    background-color: var(--dark);
    border-radius: 10px;
    transition: all 0.3s ease-in-out;
}

/* Responsive styles */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        z-index: 101;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 100%;
        background-color: var(--light);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 100;
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .theme-switch {
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%);
        z-index: 101;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s;
    }
    
    .theme-switch.show-mobile {
        opacity: 1;
        pointer-events: all;
    }
    
    /* Hamburger to X animation */
    .mobile-menu-toggle.active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    
    .mobile-menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    transition: color 0.3s;
}

.logo span {
    color: var(--primary);
    transition: color 0.3s;
}

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

.nav-links a {
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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



.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white; /* Always white text on colored buttons */
    padding: 0.7rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white; /* Always white text on colored buttons */
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background: transparent;
    border: 2px solid transparent;
    background-image: linear-gradient(var(--card-bg), var(--card-bg)), 
                      linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    background-origin: border-box;
    background-clip: content-box, border-box;
    color: var(--primary);
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-outline:hover {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white; /* Always white text on colored buttons */
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 2rem;
    transition: color 0.3s;
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s;
}







.tech-badge {
    display: inline-block;
    background-color: var(--gray-light);
    color: var(--dark);
    padding: 0.4rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.tech-badge:hover {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    text-shadow: none; /* Override the heading hover text-shadow for tech badges */
}

.section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 3rem;
    text-align: center;
    transition: color 0.3s;
}

.alternating-section {
    background-color: var(--card-bg); /* Uses the theme's card background color */
}

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

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--gray-light);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s, border-color 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark); /* Ensure card titles are readable */
}

.card-content {
    color: var(--gray);
    margin-bottom: 1.5rem;
    transition: color 0.3s;
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    padding: 1.5rem;
    background-color: var(--card-bg);
    border: 1px solid var(--gray-light);
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.skill-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark); /* Ensure skill titles are readable */
}

.skill-title i {
    color: var(--primary);
    transition: color 0.3s;
}

.experience-item {
    margin-bottom: 3rem;
}

.experience-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.experience-company {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.experience-date {
    font-size: 0.875rem;
    color: var(--gray);
    margin-bottom: 1rem;
    transition: color 0.3s;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background-color: var(--gray-light);
    transition: background-color 0.3s;
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item:before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.timeline-item:hover:before {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.contact-content {
    display: flex;
    gap: 3rem;
}

.contact-info {
    flex: 1;
}

.contact-form {
    flex: 2;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark); /* Ensure form labels are readable */
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-light);
    border-radius: 0.375rem;
    font-size: 1rem;
    background-color: var(--input-bg);
    color: var(--dark);
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

textarea.form-control {
    resize: vertical;
    min-height: 150px;
}

.footer {
    background-color: var(--gray-light);
    color: var(--dark);
    padding: 3rem 0;
    transition: background-color 0.3s, color 0.3s;
}

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

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

.social-links a {
    color: var(--dark);
    font-size: 1.25rem;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--primary);
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}


.interests-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.interest-card {
    position: relative;
    width: 220px;
    height: 220px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

.interest-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.interest-icon {
    font-size: 50px;
    margin-bottom: 15px;
    color: #4a90e2;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.interest-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.interest-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(74, 144, 226, 0.95);
    color: white;
    display: flex;
    flex-direction: column;
    padding: 25px;
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 10px;
    overflow: auto;
}

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

.interest-card:hover .interest-icon,
.interest-card:hover .interest-title {
    opacity: 0;
}

.interest-overlay h4 {
    font-size: 16px;
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: 600;
}

.interest-overlay p {
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .interests-container {
        gap: 20px;
    }
    
    .interest-card {
        width: 180px;
        height: 180px;
    }
}

@media (max-width: 480px) {
    .interests-container {
        flex-direction: column;
        align-items: center;
    }
    
    .interest-card {
        width: 100%;
        max-width: 280px;
    }
}

/* Project Folders Styling */
.projects-container {
    max-width: 1200px;
    margin: 0 auto;
}

.project-folder {
    margin-bottom: 2rem;
    border: 1px solid var(--gray-light);
    border-radius: 0.75rem;
    background-color: var(--card-bg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-folder:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.folder-header {
    display: flex;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    transition: all 0.3s ease;
    position: relative;
}

.folder-header:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.folder-icon {
    position: relative;
    font-size: 1.5rem;
    margin-right: 1rem;
    width: 24px;
    height: 24px;
}

.folder-icon .fa-folder {
    display: block;
    transition: opacity 0.3s ease;
}

.folder-icon .fa-folder-open {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-folder.expanded .folder-icon .fa-folder {
    opacity: 0;
}

.project-folder.expanded .folder-icon .fa-folder-open {
    opacity: 1;
}

.folder-title {
    flex: 1;
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.folder-count {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-right: 1rem;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
}

.folder-toggle {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.project-folder.expanded .folder-toggle {
    transform: rotate(180deg);
}

.folder-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 2rem;
}

.project-folder.expanded .folder-content {
    max-height: 2000px;
    padding: 2rem;
}

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

/* Responsive adjustments for project folders */
@media (max-width: 768px) {
    .folder-header {
        padding: 1rem 1.5rem;
    }
    
    .folder-title {
        font-size: 1.25rem;
    }
    
    .folder-count {
        font-size: 0.75rem;
        margin-right: 0.5rem;
    }
    
    .project-folder.expanded .folder-content {
        padding: 1.5rem;
    }
    
    .folder-content .grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .folder-header {
        padding: 0.75rem 1rem;
    }
    
    .folder-title {
        font-size: 1.1rem;
    }
    
    .folder-icon {
        font-size: 1.25rem;
        margin-right: 0.75rem;
    }
    
    .project-folder.expanded .folder-content {
        padding: 1rem;
    }
}
/* Experience Section Mobile Toggle */
.experience-toggle-mobile {
    display: none;
}

.experience-toggle-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--card-bg);
    color: var(--dark);
    border: 2px solid var(--gray-light);
}

.experience-toggle-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-color: transparent;
}

.experience-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
    .experience-toggle-mobile {
        display: flex !important;
    }
    
    .experience-grid {
        grid-template-columns: 1fr !important;
    }
    
    .experience-column {
        display: none;
    }
    
    .experience-column.active {
        display: block;
    }
}