/* --- [ ROOT & THEME ] --- */
:root {
    --primary-color: #00ffc3; /* A bright, techy mint/cyan */
    --primary-light: #8effe5;
    --primary-dark: #00a884;
    --bg-color: #0a0a0a;       /* True black for high contrast */
    --bg-medium: #111111;    /* Off-black for cards */
    --bg-light: #1a1a1a;
    --text-color: #eaeaea;
    --text-muted: #888;
    --border-color: #222;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* --- [ GLOBAL RESET & SETUP ] --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    /* Custom scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--bg-light) var(--bg-color);
}
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background-color: var(--bg-light);
    border-radius: 4px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- [ 3D BACKGROUND CANVAS ] --- */
#three-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    opacity: 1;
    transition: opacity 1s ease-out;
}
/* This class will be added by JS when scrolling */
body.scrolled #three-bg {
    opacity: 0.1; /* Fade out the 3D canvas on scroll */
}

/* --- [ STICKY NAVIGATION ] --- */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 5%;
    background: rgba(10, 10, 10, 0.7); /* Glassmorphism */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: var(--transition-fast);
}
.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}
.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}
.nav-links a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color var(--transition-fast);
}
.nav-links a:hover {
    color: var(--primary-color);
}

/* --- [ HERO / HOME SECTION ] --- */
.hero-section {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative; /* For scroll indicator */
}
.hero-content {
    /* Animate the hero content itself */
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s ease-out 0.5s forwards;
}
.profile-pic {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    margin-bottom: 1.5rem;
}
.hero-title {
    font-size: 4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -1px;
}
.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin: 0.5rem 0 1rem 0;
    max-width: 600px;
}
.learning-container {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}
.learning-container > span:first-child {
    color: var(--text-color);
    font-weight: 500;
    margin-right: 0.25rem;
}
.learning-tag {
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--bg-light);
    color: var(--primary-light);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}
.hero-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}
.hero-links a {
    color: var(--text-muted);
    transition: var(--transition-fast);
}
.hero-links a:hover {
    color: var(--primary-light);
    transform: scale(1.1);
}
.hero-links svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

/* --- [ CALL TO ACTION BUTTON ] --- */
.cta-button {
    display: inline-block;
    background: var(--primary-color);
    color: var(--bg-color);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    border: 2px solid var(--primary-color);
    transition: var(--transition-fast);
}
.cta-button:hover {
    background: transparent;
    color: var(--primary-color);
    transform: translateY(-3px);
}
.cta-button.secondary {
    background: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}
.cta-button.secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* --- [ SCROLL DOWN INDICATOR ] --- */
.scroll-down-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.7;
    animation: fadeIn 1s ease-out 1.5s forwards;
}
.scroll-down-indicator span {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.mouse-icon {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}
.wheel {
    width: 4px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 1.5s infinite;
}
@keyframes scrollWheel {
    0% { top: 6px; opacity: 1; }
    100% { top: 20px; opacity: 0; }
}

/* --- [ MAIN 2D CONTENT WRAPPER ] --- */
.content-wrapper {
    background: var(--bg-color); /* Solid background for 2D content */
    position: relative; /* To stack on top of the z-index -1 canvas */
    z-index: 10;
}
.content-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 5%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}
.content-section:last-child {
    border-bottom: none;
}
.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1rem;
}
.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 3rem;
}

/* --- [ FADE-IN ANIMATIONS ] --- */
.hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.show {
    opacity: 1;
    transform: translateY(0);
}
/* Stagger children animations */
.hidden.show > * {
    transition-delay: 0.3s;
}

/* --- [ ABOUT SECTION ] --- */
.about-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    text-align: left;
    width: 100%;
}
.about-text {
    flex: 2;
}
.about-text p {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    max-width: 650px;
}
.about-text p:last-child {
    margin-bottom: 0;
}
.about-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}
.about-image {
    width: 100%;
    max-width: 300px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}


/* --- [ PROJECTS SECTION ] --- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    width: 100%;
    text-align: left;
}
.project-card {
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-fast);
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: var(--primary-dark);
}
.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}
.project-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1; /* Makes footer stick to bottom */
}
.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}
.project-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    flex-grow: 1;
}
.project-metrics {
    font-size: 0.9rem;
    color: var(--text-muted);
    list-style: none;
    padding-left: 1rem;
    margin-bottom: 1rem;
    flex-grow: 1;
}
.project-metrics li {
    position: relative;
    margin-bottom: 0.25rem;
}
.project-metrics li::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--primary-color);
    font-weight: 700;
}
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}
.project-tag {
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-light);
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}
.project-links {
    display: flex;
    gap: 1rem;
}
.project-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}
.project-link:hover {
    background: var(--bg-light);
    color: var(--primary-light);
    border-color: var(--primary-dark);
}

/* --- [ SKILLS SECTION ] --- */
.skill-categories-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    width: 100%;
    text-align: left;
}
.skill-category {
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}
.skill-category h3 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-light);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
}
.skill-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.skill-grid span {
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--bg-light);
    color: var(--text-color);
    padding: 0.5rem 0.75rem;
    border-radius: 5px;
}

/* --- [ ACHIEVEMENTS SECTION ] --- */
.rankings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    width: 100%;
    margin-bottom: 3rem;
}
.rank-card {
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}
.rank-platform {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}
.rank-stat {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0.25rem 0;
}
.rank-sub {
    font-size: 0.9rem;
    color: var(--text-muted);
}
.achievements-list-container {
    width: 100%;
    max-width: 800px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: left;
}
.achievements-list-container h3 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 1rem;
}
.achievements-list {
    list-style: none;
    padding-left: 1.5rem;
}
.achievements-list li {
    position: relative;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.achievements-list li::before {
    content: '»';
    position: absolute;
    left: -1.5rem;
    top: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* --- [ CONTACT SECTION ] --- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    width: 100%;
    max-width: 900px;
}
.contact-card {
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-fast);
}
.contact-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-dark);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.contact-card svg {
    width: 32px;
    height: 32px;
    fill: var(--primary-light);
    margin-bottom: 1rem;
}
.contact-card span {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-color);
}
.contact-card .contact-username {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 400;
}


/* --- [ FOOTER ] --- */
.footer {
    padding: 2rem 5%;
    text-align: center;
    background: var(--bg-medium);
    border-top: 1px solid var(--border-color);
}
.footer p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- [ RESPONSIVENESS ] --- */
@media (max-width: 900px) {
    .about-content {
        flex-direction: column;
    }
    .about-text {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Simple responsive solution */
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .skill-categories-container {
        grid-template-columns: 1fr;
    }
    .contact-buttons-container {
        flex-direction: column;
    }
    .about-image-container {
        margin-top: 2rem;
    }
    .hero-links {
        gap: 1rem;
    }
    .hero-links svg {
        width: 24px;
        height: 24px;
    }
}

/* --- [ KEYFRAME ANIMATIONS ] --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}