:root {
    --bg-color: #0a192f;
    --text-color: #8892b0;
    --heading-color: #ccd6f6;
    --accent-primary: #64ffda;
    --accent-secondary: #bd34fe;
    --card-bg: #112240;
    --nav-bg: rgba(10, 25, 47, 0.85);

    --font-main: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;

    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

body.light-mode {
    --bg-color: #f0f2f5;
    --text-color: #4a5568;
    --heading-color: #1a202c;
    --accent-primary: #0070f3;
    /* Darker blue for better contrast on light */
    --accent-secondary: #7928ca;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.85);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    font-size: 16px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--heading-color);
    font-weight: 700;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.6rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
}

.btn-primary:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    margin-left: 1rem;
}

.btn-outline:hover {
    border-color: var(--heading-color);
    color: var(--heading-color);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-main);
    font-size: 1.5rem;
    color: var(--heading-color);
    font-weight: 800;
    letter-spacing: -0.5px;
}

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

.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--heading-color);
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--heading-color);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
    padding: 0.5rem;
    /* Add padding for easier clicking */
    display: flex;
    align-items: center;
}

.theme-toggle:hover {
    color: var(--accent-primary);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--heading-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.hero-greeting {
    font-family: var(--font-mono);
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.hero-name {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

.hero-description {
    max-width: 500px;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.code-block {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--heading-color);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    border: 1px solid rgba(100, 255, 218, 0.1);
    overflow-x: auto;
}

/* About Section */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 6px;
    border-left: 4px solid var(--accent-primary);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
}

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

.stat-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.stat-card p {
    font-size: 0.9rem;
}

/* Skills Section */
.skills {
    padding: 100px 0;
}

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

.skill-category {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 6px;
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--accent-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
}

/* Projects Section */
.projects {
    padding: 100px 0;
}

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

.project-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 6px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-7px);
}

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

.project-header i.fa-folder-open {
    color: var(--accent-primary);
    font-size: 2rem;
}

.project-links a {
    color: var(--heading-color);
    font-size: 1.2rem;
    margin-left: 1rem;
}

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

.project-title {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.project-desc {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-color);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    text-align: center;
}

.contact-text {
    max-width: 600px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
}

.social-links {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--text-color);
}

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

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

/* Experience Section */
.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
    border-left: 2px solid var(--accent-primary);
}

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

.experience-item::before {
    content: '';
    position: absolute;
    left: -2.6rem;
    top: 0.5rem;
    width: 1rem;
    height: 1rem;
    background: var(--bg-color);
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    z-index: 1;
}

.experience-header {
    margin-bottom: 1rem;
}

.experience-header h3 {
    color: var(--heading-color);
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.experience-header .company {
    display: block;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.experience-header .date {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.experience-details {
    list-style: none;
    padding: 0;
}

.experience-details li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.experience-details li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* Education Section */
.education-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: transform 0.3s ease;
}

.education-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.edu-icon {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

.edu-details h3 {
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.edu-details .institution {
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Contact Updates */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.contact-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    transition: all 0.3s ease;
}

.contact-icon-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-color);
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--card-bg);
        flex-direction: column;
        padding: 2rem;
        text-align: center;
    }

    .nav-list.active {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .hero-name {
        font-size: 3rem;
    }

    .hero-title {
        font-size: 2rem;
    }
}

/* Safe Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, transform;
}

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

.delay-100 {
    transition-delay: 100ms;
}

.delay-200 {
    transition-delay: 200ms;
}

.delay-300 {
    transition-delay: 300ms;
}

/* Animations */
.hidden {
    opacity: 0;
    filter: blur(5px);
    transition: all 1s;
}

.show {
    opacity: 1;
    filter: blur(0);
    transform: translateX(0) translateY(0) scale(1);
}

.fade-up {
    transform: translateY(50px);
}

.slide-left {
    transform: translateX(-100%);
}

.slide-right {
    transform: translateX(100%);
}

.zoom-in {
    transform: scale(0.5);
}

/* Staggered Delays */
.delay-100 {
    transition-delay: 100ms;
}

.delay-200 {
    transition-delay: 200ms;
}

.delay-300 {
    transition-delay: 300ms;
}

.delay-400 {
    transition-delay: 400ms;
}