/* Preloader Styling */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.loader {
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

/* Particles.js Background */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
}

/* Main Content Wrapper */
.content-wrapper {
    position: relative;
    z-index: 2;
}

/* Modal Styling */
.modal-overlay {
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

/* General Theme Variables & Styles */
:root {
    --font-body: 'Poppins', sans-serif;
    --font-heading: 'Roboto Slab', serif;
    --bg-light: #f4f7fc;
    --text-light: #1a202c;
    --primary-light: #3b82f6;
    --card-light: #ffffff;
    --nav-bg-light: rgba(255, 255, 255, 0.8);
    --icon-filter-light: invert(39%) sepia(80%) saturate(2294%) hue-rotate(205deg) brightness(97%) contrast(95%);
    --bg-dark: #0a192f;
    --text-dark: #cbd5e1;
    --primary-dark: #60a5fa;
    --card-dark: #1e293b;
    --nav-bg-dark: rgba(10, 25, 47, 0.8);
    --icon-filter-dark: invert(74%) sepia(21%) saturate(1466%) hue-rotate(185deg) brightness(101%) contrast(97%);
}

html.light {
    --bg-color: var(--bg-light);
    --text-color: var(--text-light);
    --primary-color: var(--primary-light);
    --card-color: var(--card-light);
    --nav-bg-color: var(--nav-bg-light);
    --icon-filter: var(--icon-filter-light);
}

html.dark {
    --bg-color: var(--bg-dark);
    --text-color: var(--text-dark);
    --primary-color: var(--primary-dark);
    --card-color: var(--card-dark);
    --nav-bg-color: var(--nav-bg-dark);
    --icon-filter: var(--icon-filter-dark);
}

#tags img {
    filter: var(--icon-filter);
    transition: filter 0.3s;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
}

#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: all 0.4s ease-in-out;
}

#nav-container {
    transition: all 0.4s ease-in-out;
    background-color: transparent;
    width: 100%;
    max-width: 100%;
    border-radius: 0;
    box-shadow: none;
    padding: 1rem 1.5rem;
}

body.scrolled #main-nav {
    top: 1rem;
}

body.scrolled #nav-container {
    width: calc(100% - 2rem);
    max-width: 800px;
    margin: 0 auto;
    border-radius: 9999px;
    background-color: var(--nav-bg-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1.5rem;
}

#cursor {
    animation: blink 0.7s infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.project-card .project-overlay {
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

.timeline-item {
    border-left: 3px solid var(--primary-color);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -9px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 3px solid var(--bg-color);
}

#mobile-menu {
    background-color: var(--bg-color);
}

/* GSAP animation helper */
.g-char {
    display: inline-block;
    visibility: hidden;
}

/* GitHub Repo Card Styling */
.repo-card {
    background-color: var(--card-color);
    border: 1px solid transparent;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.repo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border-color: var(--primary-color);
}

/* Section Background Fix */
.content-section {
    background-color: var(--bg-color);
}

#experience, 
/* skills ,*/
footer {
    background-color: var(--card-color);
}