/* Global Variables */
:root {
    /* Base Colors */
    --yellow: #f4a300;
    --red: #f44336;
    --blue: #00bcd4;

    /* Semantic Variables (Light Mode Default) */
    --bg-body: #f2f2f2;
    --bg-nav: #f2f2f2;
    --text-main: #111;
    --text-secondary: #333;
    --text-muted: #777;
    --shadow-color: rgba(0, 0, 0, 0.15);
    --border-color: #ccc;
    --nav-border: #eee;
    --card-bg: #fff;
    --light-gray: #ccc;
    --dark-gray: #777;
}

[data-theme="dark"] {
    /* Dark Mode Overrides */
    --bg-body: #121212;
    --bg-nav: #1e1e1e;
    --text-main: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #888;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --border-color: #333;
    --nav-border: #333;
    --card-bg: #1e1e1e;
    --light-gray: #333;
    --dark-gray: #aaa;
}

/* Basic Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Body Styles */
body {
    background-color: var(--bg-body);
    color: var(--text-main);
    padding: 40px;
    line-height: 1.6;
    /* Enhance readability */
}

/* Header Styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 600;
    z-index: 1001;
    color: var(--text-main);
}

.logo-dot {
    background-color: var(--yellow);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 10px;
}

.logo span.role {
    font-weight: normal;
    font-size: 14px;
    margin-left: 8px;
    color: var(--text-muted);
}

/* Navigation Styles */
nav a {
    text-decoration: none;
    color: var(--text-main);
    margin-left: 25px;
    font-size: 16px;
    position: relative;
    padding-bottom: 5px;
    /* Space for underline */
}

nav a::after {
    content: "";
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--text-main);
    left: 0;
    bottom: 0;
    transition: 0.3s;
}

nav a:hover::after {
    width: 100%;
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    z-index: 1001;
    color: var(--text-main);
    /* Ensure color is visible */
}

/* Main Content Area */
main {
    padding: 0 2rem;
    /* Adjusted padding for main content */
    max-width: 1200px;
    /* Limit content width */
    margin: 0 auto;
    /* Center the content */
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--yellow);
    /* Apply defined variable color */
    text-align: center;
    /* Center the main title */
}

/* Project Cards Styling */
.project {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 50px;
    box-shadow: 0 8px 25px var(--shadow-color);
    /* Stronger shadow */
    padding: 30px;
    /* Increased padding */
    border-radius: 15px;
    /* More rounded corners */
    background-color: var(--card-bg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    /* Smooth transition for shadow */
    opacity: 0;
    /* Hidden by default for fade-in effect */
    transform: translateY(20px);
    /* Slightly moved down for fade-in */
}

.project.visible {
    /* Class added by JS for fade-in */
    opacity: 1;
    transform: translateY(0);
}

.project:hover {
    transform: translateY(-8px);
    /* More pronounced lift on hover */
    box-shadow: 0 12px 35px var(--shadow-color);
    /* Enhanced shadow on hover */
}

.project-text,
.project-img {
    flex: 1 1 45%;
    /* Adjusted flex basis for better distribution */
    padding: 20px;
    min-width: 300px;
    /* Ensure content doesn't shrink too much */
}

.project-text h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.project-text p {
    font-size: 1.1rem;
    /* Slightly larger text for readability */
    color: var(--text-secondary);
    /* Darker gray for text */
}

.project-img {
    text-align: center;
}

.project-img img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    /* Consistent border-radius */
    box-shadow: 0 6px 20px var(--shadow-color);
    transition: transform 0.3s ease;
}

.project-img img:hover {
    transform: scale(1.02);
    /* Slightly less aggressive zoom on image hover */
}

/* Footer Styles */
footer {
    margin-top: 80px;
    border-top: 1px solid var(--border-color);
    padding: 40px 20px;
    background-color: var(--bg-body);
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    max-width: 1000px;
    margin: auto;
    text-align: left;
    /* Align text left within footer sections */
}

.footer-section {
    min-width: 150px;
    flex: 1 1 200px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

.footer-section strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-main);
    /* Make strong text more prominent */
    font-size: 1.1rem;
}

.footer-section p {
    margin-bottom: 5px;
    color: var(--text-secondary);
}

.social-icons a {
    color: var(--text-main);
    margin-right: 15px;
    font-size: 22px;
    /* Slightly larger social icons */
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: var(--yellow);
    /* Hover effect for social icons */
}

.footer-bottom {
    margin-top: 40px;
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-main);
    text-decoration: underline;
}

/* Back to Top Button */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 0.7rem 1.1rem;
    /* Slightly larger button */
    background: var(--yellow);
    /* Use defined variable */
    border: none;
    border-radius: 50%;
    /* Make it perfectly round */
    color: #fff;
    font-size: 1.5rem;
    /* Larger arrow */
    cursor: pointer;
    display: none;
    box-shadow: 0 4px 10px var(--shadow-color);
    /* Enhanced shadow */
    transition: background 0.3s ease, transform 0.2s ease;
    line-height: 1;
    /* Center the arrow vertically */
}

#backToTop:hover {
    background: #e09200;
    /* Darker yellow on hover */
    transform: translateY(-3px);
    /* Slight lift */
}

/* Preloader Styles */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--card-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.4s ease;
}

.loader {
    font-size: 48px;
    animation: bounce 1.2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

/* Theme Toggle Button Styles */
.theme-toggle {
    cursor: pointer;
    font-size: 20px;
    margin-left: 20px;
    color: var(--text-main);
    background: none;
    border: none;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Responsive Adjustments (Media Queries) */
@media (max-width: 768px) {
    body {
        padding: 20px;
    }

    header {
        margin-bottom: 40px;
        flex-wrap: wrap;
        /* Allow wrapping for logo and toggle */
    }

    .logo {
        flex-grow: 1;
        /* Allow logo to take more space */
    }

    .menu-toggle {
        display: block;
        /* Show hamburger menu */
        order: 2;
        /* Place toggle after logo */
        margin-left: auto;
        /* Push toggle to the right */
    }

    nav {
        display: none;
        /* Hide navigation by default */
        flex-direction: column;
        position: absolute;
        top: 100%;
        /* Below the header */
        left: 0;
        width: 100%;
        background-color: var(--bg-nav);
        /* White background for menu */
        box-shadow: 0 8px 16px var(--shadow-color);
        padding: 20px 0;
        /* Adjusted padding */
        border-top: 1px solid var(--nav-border);
        z-index: 1000;
    }

    nav.active {
        display: flex;
        /* Show navigation when active */
    }

    nav a {
        margin: 15px 0;
        /* More vertical space for links */
        text-align: center;
        color: var(--text-main);
        /* Ensure links are visible */
    }

    h1 {
        font-size: 2rem;
        /* Smaller main title on mobile */
    }

    .project {
        flex-direction: column;
        /* Stack project items vertically */
        text-align: center;
        padding: 20px;
    }

    .project-text,
    .project-img {
        padding: 10px;
        min-width: unset;
        /* Remove min-width for mobile */
    }

    .project-text h2 {
        font-size: 1.7rem;
        /* Smaller project titles */
    }

    .project-text p {
        font-size: 1rem;
        /* Smaller project description text */
    }

    .footer-container {
        flex-direction: column;
        /* Stack footer sections vertically */
        align-items: center;
        text-align: center;
    }

    .footer-section {
        text-align: center;
        /* Center text within footer sections on mobile */
        width: 100%;
        /* Full width */
    }

    .social-icons a {
        margin: 0 10px;
        /* Adjust spacing for social icons */
    }

    #backToTop {
        bottom: 20px;
        right: 20px;
        padding: 0.6rem 1rem;
        font-size: 1.3rem;
    }
}

/* Further small screen adjustments */
@media (max-width: 480px) {
    body {
        padding: 15px;
    }

    header {
        margin-bottom: 30px;
    }

    .logo {
        font-size: 18px;
    }

    .logo span.role {
        font-size: 12px;
    }

    h1 {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }

    .project {
        padding: 15px;
        margin-bottom: 30px;
    }

    .project-text h2 {
        font-size: 1.5rem;
    }

    .project-text p {
        font-size: 0.95rem;
    }

    footer {
        padding: 20px 10px;
    }

    .footer-bottom {
        margin-top: 20px;
    }
}