:root {
    --primary-color: #007bff;
    --primary-color-hover: #0056b3;
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --text-secondary-color: #a0a0a0;
    --border-color: #333333;
    --font-family: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

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

h1, h2, h3 {
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; color: var(--primary-color); }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary-color);
}

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

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

/* Header & Nav */
header {
    background-color: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

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

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 400;
}

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

.hero-content {
    max-width: 800px;
}

.avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    margin-bottom: 1.5rem;
}

.hero .location {
    font-size: 1.1rem;
    color: var(--text-secondary-color);
    margin-bottom: 0.5rem;
}

.hero .intro {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem auto;
    color: var(--text-color);
}

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

.btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--primary-color-hover);
    color: #fff;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* Content Sections */
.content-section {
    padding: 6rem 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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


.about {
    background-color: var(--surface-color);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.skill-item {
    background-color: var(--background-color);
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    font-weight: 600;
}

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

.project-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-card h3, .project-card p, .project-card a {
    padding: 0 1.5rem;
}

.project-card h3 {
    padding-top: 1.5rem;
}

.project-card p {
    flex-grow: 1;
}

.project-card .btn {
    display: inline-block;
    margin: 1.5rem;
    text-align: center;
}

/* Contact Section */
.contact {
    background-color: var(--surface-color);
    text-align: center;
}

.contact-info {
    margin: 2rem 0;
}

.contact-info p {
    font-size: 1.1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.social-links a {
    font-size: 2.5rem;
    margin: 0 1rem;
    color: var(--text-secondary-color);
}

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    background-color: var(--background-color);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary-color);
}

/* Fixed GitHub Button */
.github-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #fff;
    color: #000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.github-float:hover {
    transform: scale(1.1);
    color: #000;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    header nav {
        flex-direction: column;
        gap: 0.5rem;
    }

    nav ul li {
        margin-left: 1rem;
        margin-right: 1rem;
    }

    .hero {
        padding: 120px 1rem 2rem 1rem;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-size: 2.8rem;
}

.section-header p {
    max-width: 520px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--text-secondary-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: linear-gradient(180deg, rgba(30,30,30,0.9), rgba(18,18,18,0.9));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    position: relative;
}

.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent, rgba(0,123,255,0.08), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-card:hover::before {
    opacity: 1;
}

.project-card:hover {
    transform: translateY(-10px) scale(1.01);
    box-shadow: 0 15px 40px rgba(0,0,0,0.5);
    border-color: var(--primary-color);
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.08);
}

.project-content {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.project-content p {
    flex-grow: 1;
    font-size: 0.95rem;
    line-height: 1.6;
}

.project-content .btn {
    align-self: flex-start;
    margin-top: 1.2rem;
    padding: 0.7rem 1.8rem;
    border-radius: 999px;
    font-size: 0.9rem;
}
.project-card {
    position: relative;
}

.project-card::before {
    pointer-events: none;
}