/* ===== FONTS & RESET ===== */
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Playfair+Display:wght@400;700;900&display=swap");

:root {
    --clr-gold:    #e94560;
    --clr-text:    #555555;
    --clr-white:   #ffffff;
    --clr-light:   #f8f8f8;
    --clr-border:  rgba(0,0,0,0.1);
    --font-display: "Playfair Display", Georgia, serif;
    --font-body:    "Poppins", sans-serif;
    --shadow:       0 4px 24px rgba(0,0,0,0.10);
    --transition:   all 300ms ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); background: var(--clr-white); }
p { color: var(--clr-text); }
a { color: black; text-decoration: none; transition: var(--transition); }
a:hover { color: grey; text-decoration: underline; text-underline-offset: 1rem; text-decoration-color: rgb(181,181,181); }

/* ===== DESKTOP NAV ===== */
nav, .nav-links { display: flex; }
nav { justify-content: space-around; align-items: center; height: 17vh; position: relative; z-index: 100; }
.nav-links { gap: 2rem; list-style: none; font-size: 1.5rem; }
.logo { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; letter-spacing: 0.02em; }
.logo:hover { cursor: default; }

/* ===== HAMBURGER ===== */
#hamburger-nav { display: none; }
.hamburger-menu { position: relative; display: inline-block; }
.hamburger-icon { display: flex; flex-direction: column; justify-content: space-between; height: 24px; width: 30px; cursor: pointer; }
.hamburger-icon span { width:100%; height: 2px; background-color: black; transition: all 0.3s ease-in-out; }
.menu-links { position: absolute; top: 100%; right: 0%; background-color: white; width: fit-content; max-height: 0; overflow: hidden; transition: all 0.3s ease-in-out; z-index: 200; }
.menu-links a { display: block; padding: 10px; text-align: center; font-size: 1.5rem; color: black; }
.menu-links li { list-style-type: none; }
.menu-links.open { max-height: 300px; }
.hamburger-icon.open span:first-child { transform: rotate(45deg) translate(10px, 5px); }
.hamburger-icon.open span:nth-child(2) { opacity: 0; }
.hamburger-icon.open span:last-child { transform: rotate(-45deg) translate(10px, -5px); }

/* ===== VIDEO BACKGROUND ===== */
.video-container { position: fixed; top: 0; left: 0; width: 100%; height: 100%; overflow: hidden; z-index: -1; }
#bg-video { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); min-width: 100%; min-height: 100%; object-fit: cover; }
.video-overlay { position: absolute; top:0; left:0; width:100%; height:100%; background: rgba(255,255,255,0.55); }

/* ===== SECTION BASE ===== */
section { padding: 4vh 10rem; min-height: fit-content; box-sizing: border-box; }

/* ===== SHARED TITLES ===== */
.section__text__p1 { text-align: center; font-size: 1rem; font-weight: 500; color: var(--clr-gold); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 0.25rem; }
.title { font-family: var(--font-display); font-size: 3rem; text-align: center; font-weight: 700; margin-bottom: 2rem; color: #111; }

/* ===== HERO / PROFILE ===== */
#profile { display: grid; grid-template-columns: auto 1fr; gap: 5rem; align-items: center; height: 80vh; }
.section__pic-container { display: flex; height: 400px; width: 400px; margin: auto 0; border-radius: 50%; overflow: hidden; box-shadow: 0 8px 40px rgba(0,0,0,0.18); }
.section__pic-container img { width: 100%; height: 100%; object-fit: cover; }
.section__text { align-self: center; text-align: center; }
#social-container { display: flex; justify-content: center; margin-top: 1rem; gap: 1rem; }
.icon { cursor: pointer; height: 2rem; width: 2rem; }
.arrow-down { display: block; margin: 2rem auto 0; }

/* TYPING EFFECT */
.typing-container { min-height: 4rem; margin: 1rem 0; }
.typing-text { font-size: 1.8rem; font-weight: 600; color: #333; min-height: 4rem; display: flex; align-items: center; justify-content: center; }
#role-text { border-right: 3px solid #333; animation: cursor-blink 0.75s infinite; display: inline-block; min-width: 1ch; }
@keyframes cursor-blink { 0%,75%{ border-color:#333; } 76%,100%{ border-color:transparent; } }

/* ===== BUTTONS ===== */
.btn-container { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.btn { font-weight: 600; transition: var(--transition); padding: 1rem 1.5rem; min-width: 8rem; border-radius: 2rem; cursor: pointer; font-family: var(--font-body); font-size: 0.9rem; }
.btn-color-1, .btn-color-2 { border: rgb(53,53,53) 0.1rem solid; }
.btn-color-1 { background: rgb(53,53,53); color: white; }
.btn-color-1:hover { background: rgb(0,0,0); }
.btn-color-2 { background: none; color: #333; }
.btn-color-2:hover { background: rgb(53,53,53); color: white; }

/* ===== ABOUT ===== */
#About { padding: 60px 10rem; }
.section-container { display: flex; align-items: flex-start; gap: 3rem; max-width: 1200px; margin: 0 auto; }
.section__pic-container { flex: 0 0 auto; max-width: 400px; }
.about-pic { width: 100%; height: auto; border-radius: 2rem; display: block; box-shadow: var(--shadow); }
.about-details-container { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.about-containers { display: flex; gap: 2rem; margin-top: 2rem; }
.details-container { padding: 1.5rem; flex: 1; background: rgba(255,255,255,0.88); backdrop-filter: blur(8px); border-radius: 1.5rem; border: 1px solid var(--clr-border); box-shadow: var(--shadow); }
.details-container h3 { font-family: var(--font-display); font-size: 1.2rem; margin-bottom: 0.75rem; color: #111; }
.details-container p { font-size: 0.9rem; line-height: 1.6; margin-bottom: 0.2rem; }
.text-container { background: rgba(255,255,255,0.75); backdrop-filter: blur(6px); border-radius: 1rem; padding: 1.5rem; margin-top: 1.5rem; border: 1px solid var(--clr-border); }
.text-container p { line-height: 1.8; font-size: 0.95rem; }

/* ===== SKILLS GRID ===== */
#Experience { padding: 60px 8rem; background: rgba(255,255,255,0.35); }
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; max-width: 1100px; margin: 0 auto; }
.skill-category { background: rgba(255,255,255,0.88); backdrop-filter: blur(8px); border-radius: 1.5rem; padding: 2rem; box-shadow: var(--shadow); border: 1px solid var(--clr-border); }
.experience-sub-title { color: #111; font-size: 1.3rem; margin-bottom: 1.5rem; font-family: var(--font-display); }
.article-container { display: flex; flex-direction: column; gap: 0.75rem; }
article { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1rem; border-radius: 0.75rem; background: rgba(255,255,255,0.9); box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.article-content { text-align: left; }
.article-content h2 { font-size: 1rem; margin-bottom: 0.15rem; color: #222; }
.article-content p { color: var(--clr-text); font-size: 0.85rem; }

/* ===== WORK HISTORY TIMELINE ===== */
#WorkHistory { padding: 60px 10rem; }
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--clr-gold), #ccc); border-radius: 2px; }
.timeline-item { position: relative; padding: 0 0 2.5rem 2.5rem; }
.timeline-dot { position: absolute; left: -0.55rem; top: 0.25rem; width: 1.1rem; height: 1.1rem; border-radius: 50%; background: var(--clr-gold); border: 3px solid white; box-shadow: 0 0 0 3px var(--clr-gold); }
.timeline-content { background: rgba(255,255,255,0.88); backdrop-filter: blur(6px); border-radius: 1rem; padding: 1.5rem 2rem; box-shadow: var(--shadow); border: 1px solid var(--clr-border); transition: var(--transition); }
.timeline-content:hover { transform: translateX(4px); box-shadow: 0 8px 32px rgba(0,0,0,0.13); }
.timeline-date { font-size: 0.8rem; font-weight: 600; color: var(--clr-gold); text-transform: uppercase; letter-spacing: 0.08em; }
.timeline-content h3 { font-family: var(--font-display); font-size: 1.25rem; color: #111; margin: 0.4rem 0 0.2rem; }
.timeline-content h4 { font-size: 0.95rem; color: #555; font-weight: 500; margin-bottom: 0.75rem; }
.timeline-content p { font-size: 0.9rem; line-height: 1.7; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.75rem; }
.tech-tags span { background: #f0f0f0; color: #333; font-size: 0.75rem; padding: 0.25rem 0.65rem; border-radius: 1rem; font-weight: 500; border: 1px solid #ddd; }

/* ===== PROJECTS — BOOK FLIP ===== */
#Projects { padding: 60px 4rem; text-align: center; }

/* The outer scroll trap: its height = viewport * num-pages. JS sets it. */
#book-scroll-trap { position: relative; }

/* Sticky card that stays centered while user scrolls through the trap zone */
#book-viewport {
    position: sticky;
    top: 80px;
    width: 100%;
    max-width: 860px;
    margin: 0 auto;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-radius: 1.5rem;
    box-shadow: 0 12px 48px rgba(0,0,0,0.18), 0 2px 8px rgba(0,0,0,0.1);
    border: 1px solid var(--clr-border);
    padding: 2.5rem 3rem 2rem;
    overflow: hidden;
}

#book-stage { position: relative; min-height: 420px; }

/* Pages stacked; only .active is visible */
.book-page {
    position: absolute;
    top: 0; left: 0; right: 0;
    opacity: 0;
    pointer-events: none;
    transform: rotateX(35deg) translateY(35px);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    will-change: transform, opacity;
}
.book-page.active { opacity: 1; pointer-events: all; transform: rotateX(0deg) translateY(0px); }
.book-page.flip-out-up { opacity: 0; pointer-events: none; transform: rotateX(-35deg) translateY(-35px); }
.book-page.flip-out-down { opacity: 0; pointer-events: none; transform: rotateX(35deg) translateY(35px); }

/* Page content */
.page-inner { text-align: left; }
.page-number { font-size: 0.75rem; font-weight: 600; color: #aaa; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.4rem; }
.page-category { font-size: 0.8rem; color: var(--clr-gold); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.page-title { font-family: var(--font-display); font-size: 1.9rem; color: #111; margin-bottom: 0.75rem; line-height: 1.25; }
.page-desc { font-size: 0.92rem; line-height: 1.75; color: #444; margin-bottom: 1rem; }
.page-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.page-tech span { background: #f0f0f0; color: #333; font-size: 0.75rem; padding: 0.3rem 0.7rem; border-radius: 1rem; font-weight: 500; border: 1px solid #ddd; }
.page-stats { display: flex; gap: 2rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; align-items: flex-start; }
.stat-num { font-size: 1.5rem; font-weight: 700; color: var(--clr-gold); font-family: var(--font-display); line-height: 1; }
.stat-label { font-size: 0.75rem; color: #888; margin-top: 0.15rem; }
.page-img-row { display: flex; gap: 0.75rem; margin-bottom: 1rem; }
.page-img { flex: 1; width: 0; max-height: 150px; object-fit: cover; border-radius: 0.75rem; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.page-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.5rem; }
.project-btn { font-weight: 600; transition: var(--transition); padding: 0.6rem 1.4rem; border-radius: 2rem; font-size: 0.88rem; cursor: pointer; }

/* Book navigation */
#book-nav { display: flex; align-items: center; justify-content: space-between; margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid #eee; }
#book-prev, #book-next { background: none; border: 1px solid #333; border-radius: 2rem; padding: 0.5rem 1.25rem; font-size: 0.9rem; font-family: var(--font-body); font-weight: 600; cursor: pointer; transition: var(--transition); }
#book-prev:hover, #book-next:hover { background: #333; color: white; }
#book-prev:disabled, #book-next:disabled { opacity: 0.3; cursor: default; }
#book-progress { font-size: 0.9rem; color: #888; font-weight: 500; }
#book-dots { display: flex; justify-content: center; gap: 0.5rem; margin-top: 1rem; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #ccc; cursor: pointer; transition: all 0.3s; }
.dot.active { background: var(--clr-gold); transform: scale(1.35); }
#book-scroll-hint { font-size: 0.78rem; color: #aaa; text-align: center; margin-top: 0.75rem; font-style: italic; }

/* ===== CERTIFICATIONS ===== */
#Certifications { padding: 60px 8rem; background: rgba(255,255,255,0.35); }
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; max-width: 1000px; margin: 0 auto; }
.cert-card { background: rgba(255,255,255,0.88); backdrop-filter: blur(8px); border-radius: 1.25rem; padding: 2rem 1.5rem; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--clr-border); transition: var(--transition); }
.cert-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(0,0,0,0.13); }
.cert-icon { width: 64px; height: 64px; margin: 0 auto 1rem; }
.cert-icon img { width: 64px; height: 64px; display: block; }
.cert-card h3 { font-size: 0.95rem; color: #222; font-weight: 600; line-height: 1.4; }

/* ===== PUBLICATIONS ===== */
#Publications { padding: 60px 10rem; }
.pub-list { display: flex; flex-direction: column; gap: 1.25rem; max-width: 800px; margin: 0 auto; }
.pub-card { background: rgba(255,255,255,0.85); backdrop-filter: blur(8px); border-radius: 1rem; padding: 1.5rem 2rem; box-shadow: var(--shadow); border: 1px solid var(--clr-border); border-left: 4px solid var(--clr-gold); transition: var(--transition); }
.pub-card:hover { transform: translateX(4px); }
.pub-tag { display: inline-block; background: var(--clr-gold); color: white; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.2rem 0.6rem; border-radius: 0.5rem; margin-bottom: 0.75rem; }
.pub-card h3 { font-size: 1rem; color: #111; font-weight: 600; line-height: 1.5; }

/* ===== CONTACT ===== */
#Contact { display: flex; justify-content: center; flex-direction: column; min-height: 50vh; }
.contact-info-upper-container { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; border-radius: 2rem; border: 1px solid rgb(163,163,163); background: rgba(255,255,255,0.75); backdrop-filter: blur(8px); margin: 2rem auto; padding: 1.5rem 2rem; max-width: 700px; width: 100%; box-shadow: var(--shadow); }
.contact-info-container { display: flex; align-items: center; justify-content: center; gap: 0.5rem; }
.contact-info-container p { font-size: 1.1rem; }
.contact-icon { cursor: default; }
.email-icon { height: 2.5rem; width: 2.5rem; }

/* ===== FOOTER ===== */
footer { min-height: 20vh; margin: 0 1rem; display: flex; flex-direction: column; justify-content: center; gap: 1rem; }
footer p { text-align: center; color: #888; font-size: 0.9rem; }
.nav-links-container { display: flex; justify-content: center; }

/* ===== POPUP ===== */
.popup { display: none; position: fixed; top:0; left:0; width:100%; height:100%; background-color: rgba(0,0,0,0.5); justify-content: center; align-items: center; z-index: 9999; }
.popup-content { background-color: white; padding: 20px; border-radius: 10px; text-align: center; max-width: 80%; max-height: 80%; overflow: auto; }
.popup-content iframe { display: block; max-width: 100%; margin: 0 auto; width: 640px; height: 360px; }
.close-button { margin-top: 10px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    section { padding: 4vh 4rem; }
    #About, #WorkHistory, #Publications { padding: 60px 4rem; }
    #Experience, #Certifications { padding: 60px 3rem; }
}
@media (max-width: 900px) {
    .skills-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
    section { padding: 4vh 1.5rem; }
    #About, #Experience, #WorkHistory, #Publications, #Certifications { padding: 40px 1.5rem; }
    #Projects { padding: 40px 0.5rem; }
    #profile { grid-template-columns: 1fr; height: auto; padding: 60px 1.5rem; gap: 2rem; text-align: center; }
    .section__pic-container { margin: 0 auto; width: 260px; height: 260px; }
    .section-container { flex-direction: column; }
    .about-containers { flex-direction: column; }
    .cert-grid { grid-template-columns: 1fr 1fr; }
    #book-viewport { padding: 1.5rem 1.25rem 1.25rem; }
    .page-img-row { flex-direction: column; }
    .page-img { width: 100%; max-height: 130px; }
    .page-stats { gap: 1rem; }
}