/* --- Global Reset & Black/White/Blue Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    --bg-color: #000000;            /* True Pure Black */
    --second-bg-color: #0a0a0c;     /* Dark Charcoal Black for depth */
    --text-color: #ffffff;          /* Crisp White */
    --text-muted: #a0a0a5;         /* Muted Silver/Gray */
    --main-color: #0055ff;          /* High-Vibrancy Electric Blue */
    --card-border: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    scroll-behavior: smooth;
    font-family: 'Poppins', sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

/* --- Navigation Bar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 10%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    border-bottom: 1px solid var(--card-border);
}

.logo {
    font-size: 1.5rem;
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: 1px;
}

.logo span {
    color: var(--main-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: 0.3s ease;
    position: relative;
    letter-spacing: 0.5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--main-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-color);
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    margin: 6px;
    transition: all 0.3s ease;
}

/* --- Reusable Global Layout Elements --- */
section {
    
    padding: 7rem 10%;
}

.heading {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 4rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.heading span {
    color: var(--main-color);
}

.btn {
    display: inline-block;
    padding: 0.9rem 2.4rem;
    background: transparent;
    border: 2px solid var(--text-color);
    border-radius: 4px;
    font-size: 0.95rem;
    color: var(--text-color);
    letter-spacing: 1px;
    font-weight: 600;
    text-transform: uppercase;
    transition: 0.4s ease;
}

.btn:hover {
    background: var(--main-color);
    border-color: var(--main-color);
    box-shadow: 0 0 1.5rem rgba(0, 85, 255, 0.4);
    transform: translateY(-2px);
}

/* --- Hero Section --- */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin: 0.5rem 0;
}

.hero-content h3 {
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

.hero-content h3 span {
    color: var(--main-color);
    font-weight: 700;
}

.hero-content p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 2rem 0 2.5rem;
    line-height: 1.7;
    max-width: 550px;
}

.social-medias {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.social-medias a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 2.8rem;
    height: 2.8rem;
    background: #111;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    font-size: 1.1rem;
    color: var(--text-color);
    transition: 0.3s standard;
}

.social-medias a:hover {
    border-color: var(--main-color);
    color: var(--main-color);
    transform: translateY(-3px);
}

.hero-img .glowing-circle {
    width: 340px;
    height: 340px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    position: relative;
    background: conic-gradient(#1a6ef5, #ffffff 50%, #1a6ef5);
    animation: ringpin 8s linear infinite;
}

.hero-img .glowing-circle::before {
    content: '';
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    background: var(--bg-color);
    z-index: 0;
}

.cube-scene {
    position: relative;
    z-index: 1;
    perspective: 500px;
}

.cube {
    width: 110px;
    height: 110px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 7s linear infinite;
}

.face {
    position: absolute;
    width: 110px;
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: monospace;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.f-blue  {
    background: rgba(26, 110, 245, 0.15);
    border: 1.5px solid #1a6ef5;
    color: #ffffff;
}

.f-white {
    background: rgba(255, 255, 255, 0.06);
    border: 1.5px solid rgba(255, 255, 255, 0.5);
    color: #ffffff;
}

.face:nth-child(1) { transform: translateZ(55px); }
.face:nth-child(2) { transform: rotateY(180deg) translateZ(55px); }
.face:nth-child(3) { transform: rotateY(90deg)  translateZ(55px); }
.face:nth-child(4) { transform: rotateY(-90deg) translateZ(55px); }
.face:nth-child(5) { transform: rotateX(90deg)  translateZ(55px); }
.face:nth-child(6) { transform: rotateX(-90deg) translateZ(55px); }

@keyframes rotateCube {
    0%   { transform: rotateX(0deg)   rotateY(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

@keyframes ringpin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
@keyframes rotateCircle {
    100% { transform: rotate(360deg); }
}

/* --- About Section --- */
.about-section {
    background: var(--second-bg-color);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.about-content {
    text-align: center;
    max-width: 800px;
}

.about-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 3.5rem;
}

.skills-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.skill-box {
    background: #000000;
    border: 1px solid var(--card-border);
    padding: 1.8rem 2.2rem;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    min-width: 140px;
    transition: 0.3s step;
}

.skill-box i {
    font-size: 2.2rem;
    color: var(--text-color);
    transition: 0.3s;
}

.skill-box span {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.skill-box:hover {
    border-color: var(--main-color);
}

.skill-box:hover i {
    color: var(--main-color);
    transform: scale(1.1);
}

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

.project-card {
    position: relative;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    overflow: hidden;
    display: flex;
    height: 260px;
}

.project-card img {
    width: 100%;
    object-fit: cover;
    filter: grayscale(100%) brightness(70%);
    transition: 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-card:hover img {
    transform: scale(1.05);
    filter: grayscale(0%) brightness(50%);
}

.project-layer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.2), #000000 90%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    text-align: left;
    padding: 2rem;
    transform: translateY(40px);
    opacity: 0;
    transition: 0.4s ease;
}

.project-card:hover .project-layer {
    transform: translateY(0);
    opacity: 1;
}

.project-layer h4 {
    font-size: 1.4rem;
    color: var(--text-color);
    font-weight: 600;
}

.project-layer p {
    font-size: 0.9rem;
    margin: 0.5rem 0 1.2rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.project-layer a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 2.8rem;
    height: 2.8rem;
    background: var(--main-color);
    border-radius: 4px;
    transition: 0.3s;
}

.project-layer a i {
    font-size: 1rem;
    color: var(--text-color);
}

.project-layer a:hover {
    box-shadow: 0 0 1rem var(--main-color);
}

.contact-section{
    background: var(--second-bg-color);
    text-align:center;
    padding: 4rem 8%;
}

.contact-section h2{
    margin-bottom: 1rem;
}

.contact-section p{
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.social-links{
    display:flex;
    justify-content:center;
    gap:1.5rem;
}

/* --- Footer --- */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 2.5rem 10%;
    background: var(--bg-color);
    border-top: 1px solid var(--card-border);
}

.footer-text p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-iconTop a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem;
    background: #111;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    transition: 0.3s;
}

.footer-iconTop a:hover {
    border-color: var(--main-color);
    color: var(--main-color);
}

.footer-iconTop a i {
    font-size: 1.1rem;
    color: var(--text-color);
}

/* --- Responsive Media Queries --- */
@media (max-width: 991px) {
    section { padding: 8rem 5% 2rem; }
    .navbar { padding: 1.5rem 5%; }
}

@media (max-width: 768px) {
    .burger { display: block; }
    .burger.toggle .line1 { transform: rotate(-45deg) translate(-5px, 5px); }
    .burger.toggle .line2 { opacity: 0; }
    .burger.toggle .line3 { transform: rotate(45deg) translate(-5px, -5px); }

    .nav-links {
        position: fixed;
        right: 0px;
        height: 100vh;
        top: 0;
        background-color: var(--bg-color);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 65%;
        transform: translateX(100%);
        transition: transform 0.4s ease-in-out;
        gap: 3rem;
        z-index: 99;
        border-left: 1px solid var(--card-border);
    }

    .nav-links-active { transform: translateX(0%); }
    .hero-section { flex-direction: column-reverse; text-align: center; gap: 2rem; }
    .hero-content h1 { font-size: 3rem; }
    .hero-content p { margin: 1.5rem auto 2.5rem; }
    .social-medias { justify-content: center; }
    .contact-section form .input-box input { width: 100%; }
}
/* --- Timeline Section (Education & Experience) --- */
.timeline-section {
    background: var(--bg-color); /* Kept pure black to checkerboard sections smoothly */
}

.timeline-row {
    display: flex;
    justify-content: space-between;
    gap: 5rem;
    flex-wrap: wrap;
}

.timeline-column {
    flex: 1 1 400px;
}

.timeline-column .title {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0 0 2.5rem 1.5rem;
    color: var(--text-color);
}

.timeline-column .title i {
    color: var(--main-color);
    margin-right: 10px;
}

.timeline-box {
    border-left: 2px solid var(--card-border);
    position: relative;
}

.timeline-box .timeline-content {
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 3rem;
}

/* Timeline vertical track node circles */
.timeline-box .timeline-content::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--main-color);
    border-radius: 50%;
    left: -7px;
    top: 6px;
    box-shadow: 0 0 10px var(--main-color);
    transition: 0.3s ease;
}

.timeline-box .timeline-content:hover::before {
    background: var(--text-color);
    box-shadow: 0 0 12px var(--text-color);
}

.timeline-content .year {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--main-color);
    margin-bottom: 0.8rem;
}

.timeline-content .year i {
    margin-right: 5px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* --- Responsive Timeline Tweaks --- */
@media (max-width: 768px) {
    .timeline-row {
        gap: 3rem;
    }
    .timeline-column .title {
        margin-left: 0;
    }
}