/* CSS Variables for a clean color palette */
:root {
    --background-color: #1a202c;
    --card-background: rgba(45, 55, 72, 0.6);
    --text-color: #e2e8f0;
    --secondary-text-color: #a0aec0;
    --accent-color: #4299e1;
    --hover-color: #63b3ed;
    --glow-color: rgba(66, 153, 225, 0.4);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --hover-shadow: 0 10px 20px var(--glow-color);
}

/* --- Global Styles --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background Gradient */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #2c3e50, #2d3748, #1a202c);
    background-size: 400% 400%;
    animation: backgroundGradient 40s ease infinite;
}

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

/* New Animation for the continuous glow effect on the hero title */
@keyframes subtleGlow {
    0% { text-shadow: 0 0 5px var(--glow-color); }
    50% { text-shadow: 0 0 10px var(--glow-color), 0 0 20px var(--glow-color); }
    100% { text-shadow: 0 0 5px var(--glow-color); }
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

/* --- Fixed Navigation Bar --- */
.fixed-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(26, 32, 44, 0.8);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.nav-logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-profile-pic {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 5px var(--accent-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav-profile-pic:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px var(--accent-color);
}

.nav-name {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-color);
    transition: color 0.3s ease, letter-spacing 0.3s ease;
}

.nav-logo:hover .nav-name {
    color: var(--hover-color);
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 2rem;
}

.nav-link a {
    color: var(--secondary-text-color);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.nav-link a:hover {
    color: var(--hover-color);
    text-shadow: 0 0 5px var(--hover-color);
}

/* --- Sections and Cards --- */
section {
    padding: 6rem 1rem;
    margin-top: 5rem;
}

.section-heading {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
    letter-spacing: 1px;
    position: relative;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
    transition: color 0.3s ease, transform 0.3s ease, text-shadow 0.3s ease;
}

.section-heading::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--accent-color);
    margin: 1.2rem auto 0;
    border-radius: 2px;
    transition: background-color 0.3s ease;
}

.section-heading:hover {
    color: var(--hover-color);
    transform: scale(1.02);
    text-shadow: 0 0 12px var(--glow-color);
}

.card {
    background-color: var(--card-background);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
}

/* --- Hero Section --- */
#hero {
    text-align: center;
    padding-top: 12rem;
    padding-bottom: 8rem;
    margin-top: 0;
}

#hero h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -2px;
    color: var(--text-color);
    animation: subtleGlow 5s ease-in-out infinite;
}

#hero p {
    font-family: 'Inter', sans-serif;
    font-size: 1.5rem;
    color: var(--secondary-text-color);
    letter-spacing: 2px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* --- About Me Section --- */
#about .about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    text-align: center;
}

#about img {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-color);
    box-shadow: 0 0 15px var(--glow-color);
}

#about p {
    font-size: 1.125rem;
    color: var(--secondary-text-color);
}

/* --- Skills Section --- */
#skills .skills-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.skill-badge {
    background-color: #2d3748;
    color: var(--hover-color);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--glow-color);
}

/* --- Education & Certifications Section --- */
#education .education-group {
    margin-bottom: 3rem;
}

#education h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

#education h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--hover-color);
}

#education .education-item {
    padding-bottom: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1.2rem;
}

#education .education-item:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
}

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

/* --- Projects Section --- */
#projects .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

#projects h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

#projects a {
    color: var(--hover-color);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

#projects a:hover {
    text-decoration: underline;
    text-shadow: 0 0 5px var(--glow-color);
}

/* --- Contact Section --- */
#contact {
    text-align: center;
    padding: 4rem 1rem;
    margin-bottom: 0;
}

#contact p {
    font-size: 1.125rem;
    color: var(--secondary-text-color);
    margin-bottom: 2.5rem;
}

.contact-btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: #ffffff;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: 9999px;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

.contact-btn:hover {
    background-color: var(--hover-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--glow-color);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--secondary-text-color);
    font-size: 0.875rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Responsive Styles for Larger Screens --- */
@media (min-width: 768px) {
    #about .about-content {
        flex-direction: row;
        text-align: left;
    }

    #about img {
        width: 250px;
        height: 250px;
    }

    #hero h1 {
        font-size: 6rem;
    }
}