/* ====== GENERAL ====== */
/* Fullscreen Background Video */
#bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2; /* stays behind EVERYTHING */
    opacity: 0.4; /* adjust for brightness */
    filter: brightness(0.7) contrast(1.1) saturate(1.2);

}
body.dark-mode #video-overlay {
    background: rgba(0,0,0,0.55);
}

/* A soft dark overlay to improve readability */
#video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.35); /* balances visibility */
    z-index: -1;
}

body {
    margin: 0;
    font-family: "Poppins", sans-serif;
    background-color: #f5f5f5;
    color: #222;
}


a {
    text-decoration: none;
    color: inherit;
}

/* UNIVERSAL NAVBAR CONTAINER */
.navbar-container {
    width: 100%;
    position: fixed;
    top: 0;
    z-index: 1000;
    padding: 18px 40px;
    background: rgba(0,0,0,0.9);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
    transition: 0.3s ease;
}

/* SHRINK ON SCROLL */
.navbar-shrink {
    padding: 10px 40px;
    background: rgba(0,0,0,0.98);
}

/* LOGO */
.logo {
    font-size: 34px;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

/* NAV LINKS */
.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: white;
    font-size: 20px;
    font-weight: 500;
    text-decoration: none;
    position: relative;
    padding: 4px 0;
    transition: 0.3s;
}

/* Tech Hover Glow */
.nav-links a:hover {
    color: #00c3ff;
    text-shadow: 0 0 5px #00c3ff;
}

/* Active Page Indicator */
.nav-links a.active-link {
    color: #00c3ff;
    border-bottom: 2px solid #00c3ff;
}

/* DARK MODE BUTTON */
.dark-btn {
    margin-left: 15px;
    padding: 6px 12px;
    font-size: 18px;
    border-radius: 8px;
    border: none;
    background: white;
    color: black;
    cursor: pointer;
    transition: 0.3s;
}

.dark-btn:hover {
    background: #00c3ff;
    color: white;
}



/* HAMBURGER MENU (MOBILE) */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 5px;
    transition: 0.3s;
}

/* MOBILE MENU TRANSFORMATIONS */
.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
}
.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

#nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 65px;
    right: 40px;
    background: rgba(0,0,0,0.95);
    padding: 20px;
    border-radius: 12px;
}

/* RESPONSIVE */
@media(max-width: 900px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
}

/* DARK MODE OVERRIDES */
body.dark-mode {
    background: black;
    color: white;
}

body.dark-mode a {
    color: white;
}

body.dark-mode .nav-links a.active-link {
    color: #00c3ff;
}
/* Prevent dark mode from affecting content boxes */
.dark-mode .box,
.dark-mode .card,
.dark-mode .resume-content,
.dark-mode .others-card,
.dark-mode .project-card,
.dark-mode .contact-form-section,

.dark-mode .content-section {
    background: white !important;
    color: black !important;
}

/* ====== HERO SECTION ====== */
.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 140px 40px 80px;
    min-height: 90vh;
}

.hero-text {
    max-width: 60%;
}

.intro-title {
    font-size: 38px;
    margin-bottom: -40px;
    margin-left: 100px;
}

.intro-subtitle {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 10px;
    margin-top: -40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn-primary {
    background: #0077ff;
    padding: 12px 24px;
    color: white;
    border-radius: 8px;
    font-weight: 600;
}
.hero-buttons a {
    text-decoration: none;
    display: inline-block;
}

.hero-buttons a:hover {
    text-decoration: none;
}


.btn-outline {
    border: 2px solid #0077ff;
    padding: 10px 22px;
    border-radius: 8px;
    font-weight: 600;
    color: #0077ff;
}

.btn-primary:hover,
.btn-outline:hover {
    opacity: 0.8;
}

/* ====== VIDEO SECTION ====== */
.hero-video video {
    width: 600px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}


/* ====== FOOTER ====== */
.footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
    background: #111;
    color: white;
}

.footer a {
    color: #4da3ff;
}

.social-links a {
    margin: 0 10px;
}


/* ====== RESPONSIVE ====== */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-video video {
        margin-top: 40px;
        width: 85%;
    }
}

/* =============== ABOUT PAGE STYLES =============== */

.about-root {
    text-align: center;
    padding: 150px 40px 40px;
}

.section-title {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-bio {
    max-width: 800px;
    margin: auto;
    line-height: 1.7;
    font-size: 20px;
}



/* =============== TREE BRANCHES =============== */

.about-branches {
    display: flex;
    justify-content: space-between;
    padding: 40px;
    gap: 40px;
}

.branch {
    width: 48%;
}

.branch-title {
    font-size: 28px;
    margin-bottom: 25px;
}
.branch-title{
margin-left: 880px;
}
.skills-list {
    display:flex;
    flex-direction: row;
    align-items: center;
    gap: 212px;
    margin-top: 20px;
}

.skill-btn {
    width:500%;
    max-width: 900px;
    padding: 40px;
    background: #0077ff;
    color: white;
    border-radius: 8px;
    border: none;
    font-size: 20px;
    cursor: pointer;
    transition: 0.3s;
    text-align: center;
    

}


/* RESPONSIVE */
@media (max-width: 900px) {
    .about-branches {
        flex-direction: column;
    }

    .branch {
        width: 100%;
    }
}
.clicked {
    transform: scale(0.97);
}

/* Pop-up Info Box */
.info-box {
    display: none;
    margin-top: 10px;
    padding: 15px;
    background: white;
    color: black;
    border-radius: 10px;
    font-size: 16px;
    line-height: 1.6;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    animation: fadeIn 0.2s ease-out;
}

/* Show when active */
.info-box.active {
    display: block;
}

/* Dark mode override */
.dark-mode .info-box {
    background: white !important;
    color: black !important;
}

/* Fix buttons so box stays aligned */
.timeline-item, .skill-btn {
    position: relative;
}

/*                                */

.info-box {
    display: none;
    margin-top: 10px;
    padding: 15px;
    background: white;
    color: black;
    border-radius: 10px;
    font-size: 16px;
    line-height: 1.6;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    animation: fadeIn 0.25s ease;
}

.info-box.active {
    display: block;
}

.dark-mode .info-box {
    background: white !important;
    color: black !important;
}

/* ===================== PROJECT PAGE ===================== */

.project-header {
    text-align: center;
    padding: 150px 40px 40px;
}

.project-subtitle {
    font-size: 20px;
    opacity: 0.7;
    margin-top: -10px;
}

.project-section {
    padding: 60px 40px;
    border-bottom: 1px solid #ddd;
}

.project-title {
    font-size: 38px;
    margin-bottom: 25px;
    font-weight: 600;
}

.project-carousel img {
    border-radius: 20px;
    height: 800px;
    object-fit:fill;
}

.project-description {
    max-width: 900px;
    margin: 25px auto 0;
    font-size: 20px;
    line-height: 1.6;
}
.carousel-item {
    max-width: 1500px;
    margin: 0 auto;
    display: block;
    padding: 0 20px;   /* keeps nice spacing on phones */
    justify-content: center;
}

/* ===================== RESEARCH PAGE ===================== */

.research-header {
    text-align: center;
    padding: 150px 40px 40px;
}

.research-subtitle {
    font-size: 20px;
    opacity: 0.7;
    margin-top: -10px;
}

.research-list {
    padding: 40px;
    max-width: 2000px;
    margin: auto;
}

.research-item {
    background: white;
    border-radius: 12px;
    position: center;
    padding: 40px;
    margin-bottom: 35px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    max-width: 1000px;  /* increase width */
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    margin: 0 auto 30px; /* center the boxes */
}
.research-title {
    font-size: 38px;
    margin-bottom: 15px;
    font-weight: 600;
}

.research-description {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.research-btn {
    padding: 12px 24px;
    font-size: 20px;
    border-radius: 8px;
    display: inline-block;
}

@media (max-width: 850px) {
    .research-item {
        padding: 20px;
    }
}

.video-thumb {
    width: 100%;
    border-radius: 12px;
    display: block;
}

.play-btn {
    width: 80px;
    height: 80px;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.play-btn::before {
    content: "";
    position: absolute;
    left: 32px;
    top: 22px;
    border-style: solid;
    border-width: 18px 0 18px 28px;
    border-color: transparent transparent transparent white;
}


/* ===================== RESUME PAGE ===================== */

.resume-container {
    padding: 150px 40px 60px;
    max-width: 1500px;
    margin: auto;
}

.resume-title {
    text-align: center;
    font-size: 38px;
    margin-bottom: 40px;
}

.resume-content {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    line-height: 1.7;
    font-size: 20px;
}
/* Resume/CV: make links visible inside the white content box */
.resume-content a {
    color: #0077ff !important;
    text-decoration: underline;
}

.resume-content a:hover {
    opacity: 0.85;
}

/* ========== FLOATING DOWNLOAD BUTTON ========== */
.floating-download-btn {
    position: fixed;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    background: #0077ff;
    color: white;
    padding: 15px 22px;
    border-radius: 8px;
    font-weight: 600;
    z-index: 999;
    text-decoration: none;
    animation: pulse 1.8s infinite ease-in-out;
}

.floating-download-btn:hover {
    opacity: 0.85;
}


/* Blinking/Pulsing Effect */
@keyframes pulse {
    0% { transform: translateY(-50%) scale(1); }
    50% { transform: translateY(-50%) scale(1.06); }
    100% { transform: translateY(-50%) scale(1); }
}

@media(max-width: 850px) {
    .floating-download-btn {
        right: 10px;
        padding: 12px 16px;
    }
}

/* ===================== CONTACT PAGE ===================== */

.contact-header {
    text-align: center;
    padding: 150px 40px 40px;
}

.contact-subtitle {
    font-size: 20px;
    opacity: 0.8;
}

.contact-info {
    text-align: center;
    padding: 20px 40px 30px;
    font-size: 20px;
}

.contact-buttons {
    margin-top: 20px;
}

.contact-btn {
    background: #0077ff;
    padding: 12px 22px;
    margin: 5px;
    color: white;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0px 3px 8px rgba(0,0,0,0.15);
}

.contact-btn:hover {
    opacity: 0.85;
}

.contact-form-section {
    max-width: 1500px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    font-size: 20px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

.form-status {
    text-align: center;
    margin-top: 15px;
    font-size: 20px;
    font-weight: 600;
}


/* FINAL FIX — Protect Research Page Boxes in Dark Mode */
.dark-mode .research-item,
.dark-mode .research-item *,
.dark-mode .research-title,
.dark-mode .research-description,
.dark-mode .research-btn {
    background: white !important;
    color: black !important;
    border-color: black !important;
}
/* Smooth page transition states */
body.page-loaded {
    opacity: 1;
}

body.page-fade-out {
    opacity: 0;
}
/* ===== RANDOM SLIDE TRANSITIONS ===== */

/* Smooth transformation */
body {
    transition: transform 0.9s ease;
    transform: translateX(0);
}

/* START positions (when a page is first loaded) */
body.slide-start-left {
    transform: translateX(-100%);
}
body.slide-start-right {
    transform: translateX(100%);
}
body.slide-start-top {
    transform: translateY(-100%);
}
body.slide-start-bottom {
    transform: translateY(100%);
}

/* END positions (slide into place) */
body.slide-in {
    transform: translateX(0) translateY(0);
}

/* OUTGOING transitions */
body.slide-out-left {
    transform: translateX(-100%);
}
body.slide-out-right {
    transform: translateX(100%);
}
body.slide-out-top {
    transform: translateY(-100%);
}
body.slide-out-bottom {
    transform: translateY(100%);
}

/* Overlay to hide white flash */
#transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: black;     /* or rgba(0,0,0,0.7) */
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

/* Activate overlay on page exit */
#transition-overlay.active {
    opacity: 1;
}

/* Make footer links visible in dark mode */
.dark-mode .footer a {
    color: #4da3ff !important;   /* bright blue */
    text-shadow: 0 0 6px rgba(77,163,255,0.8);
}

.home-profile {
    width: 300px;
    height: 390px;
    margin: 50px;
    object-fit: cover;
    margin-bottom: 35px;
}
.dark-mode .home-profile {
    filter: brightness(1.1) contrast(1.2);
}
.home-profile {
    transition: 0.3s ease;
}
.home-profile:hover {
    transform: scale(1.05);
    box-shadow: 0 0 18px #00c3ff;
}
/* 3D Cube Container */
.cube-container {
    width: 300px;
    height: 300px;
    position: relative;
    margin: 100px auto;
    perspective: 900px;
}

/* Cube base */
.cube {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    transition: transform 11s ease;
}

/* Each Cube Face */
.cube .face {
    position: absolute;
    width: 300px;
    height: 300px;
    background: #000;
    border: 2px solid #111;
}

.cube .face img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Positioning Each Face */
.front  { transform: rotateY(0deg) translateZ(150px); }
.back   { transform: rotateY(180deg) translateZ(150px); }
.right  { transform: rotateY(90deg) translateZ(150px); }
.left   { transform: rotateY(-90deg) translateZ(150px); }
.top    { transform: rotateX(90deg) translateZ(150px); }
.bottom { transform: rotateX(-90deg) translateZ(150px); }

@media (max-width: 600px) {
    .cube-container {
        width: 220px;
        height: 220px;
    }
    .cube .face {
        width: 220px;
        height: 220px;
    }
}

@media (max-width: 600px) {
    .cube-container {
        width: 220px;
        height: 220px;
    }
    .cube .face {
        width: 220px;
        height: 220px;
    }
}

/*     */

/* Cube container hover improves pointer control */
.cube-container {
    cursor: grab;
}

.cube-container:active {
    cursor: grabbing;
}

/* Smooth manual rotation */
.cube {
    transition: transform 10s ease;
}
.btn-primary {
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    text-decoration: none;
}