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



 :root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent: #2563eb;
    --accent-primary: #60a5fa;
    --accent-hover: #1d4ed8;
    --border: #e5e7eb;
    --tech-badge-border: #60a5fa;
    --card-shadow: rgba(0, 0, 0, 0.05);
    --skill-tag-hover: #0353ff;
}

[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --accent: #3b82f6;
    --accent-primary: #60a5fa;
    --accent-hover: #60a5fa;
    --border: #2a2a2a;
    --tech-badge-border: #637a91;
    --card-shadow: rgba(255, 255, 255, 0.05);
    --skill-tag-hover: #191c22;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
}

.nav-links li {
    position: relative;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding-bottom: 4px;
    transition: color 0.3s ease;
}


/* Hover underline animation */

.nav-links li::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0%;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

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


/* ACTIVE LINK CSS */

.nav-links a.active {
    color: var(--accent);
    /* blue color */
    font-weight: 600;
}

.nav-links a.active+ ::after {
    width: 100%;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: rotate(15deg);
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 80px;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 800px;
}

.hero-text {
    width: 100%;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.hero h2 {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.learning-section {
    margin-top: 3rem;
    width: 100%;
}

.learning-section h2 {
    font-size: 1.7rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
    text-align: center;
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    width: 100%;
}

.learning-card {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.learning-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 5px 15px var(--card-shadow);
}

.learning-card i {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.learning-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.learning-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin: 2rem 0;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--card-shadow);
}

.btn-secondary {
    border: 2px solid var(--text-primary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

.resume-button{
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
}

.resume-button i{
    margin-right: 6px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
}

.social-links a {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skills-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.skill-category {
    background-color: var(--bg-secondary);
    padding: 1.5rem 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 2rem;
    box-shadow: 0 2px 10px var(--card-shadow);
}

.skill-category:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 25px var(--card-shadow);
    border-color: var(--text-secondary);
}

.skill-category h3 {
    font-size: 1.2rem;
    margin: 0;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 200px;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    flex: 1;
    align-items: center;
}

.skill-tag {
    background-color: var(--bg-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

.skill-tag:hover {
    background-color: var(--skill-tag-hover);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.experience-card {
    background-color: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-primary);
    transition: all 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-5px) translateX(5px);
    border-left: 6px solid var(--accent);
    box-shadow: 0 10px 30px var(--card-shadow);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.experience-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.experience-header .company {
    color: var(--accent);
    font-weight: 600;
}

.experience-header .duration {
    color: var(--text-secondary);
    font-weight: 500;
}

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

.experience-card li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.experience-card li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.highlight-badge {
    text-align: center;
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.3rem;
    margin-bottom: 1rem;
}

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

.project-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-primary);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px) translateX(5px);
    box-shadow: 0 15px 40px var(--card-shadow);
    border-left: 6px solid var(--accent);
}

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

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

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex: 1;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-badge {
    background-color: var(--bg-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    border: 0.1px solid var(--tech-badge-border);
    color: var(--text-secondary);
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.project-link:hover {
    gap: 0.75rem;
}

.education-card {
    background-color: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-primary);
    transition: all 0.3s ease;
}

.education-card:hover {
    transform: translateY(-5px) translateX(5px);
    box-shadow: 0 10px 30px var(--card-shadow);
    border-left: 6px solid var(--accent);
    transition: all 0.3s ease;
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.education-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.education-header .university {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.education-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.cgpa {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
}

footer {
    background-color: var(--bg-primary);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
}

.contact-info h3 {
    text-align: center;
    font-weight: 500;
    font-size: larger;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border);
        gap: 1rem;
    }
    .nav-links.active {
        display: flex;
    }
    .mobile-menu {
        display: block;
    }
    .hero-content {
        max-width: 100%;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero h2 {
        font-size: 1.1rem;
    }
    .hero p {
        font-size: 0.95rem;
    }
    .skill-category {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .skill-category h3 {
        min-width: auto;
    }
    .section-title {
        font-size: 2rem;
    }
    section {
        padding: 3rem 1.5rem;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    .btn {
        width: 100%;
        text-align: center;
    }
}