/* ==========================================================================
   LEE YEONG MIN Portfolio — Reference Inspired Design
   Modern Avant-Garde Minimal Dark Aesthetic
   ========================================================================== */

:root {
  --bg-black: #000000;
  --bg-deep: #090a0d;
  --bg-card: #12141a;
  --bg-card-hover: #1a1e26;
  --text-pure: #ffffff;
  --text-sub: #a1a5b0;
  --text-muted: #5e6473;
  --border-line: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.4);
  --accent: #ffffff;
  
  --font-display: 'Syne', sans-serif;
  --font-serif: 'Italiana', serif;
  --font-body: 'Space Grotesk', 'Plus Jakarta Sans', sans-serif;
  
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.25s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-black);
  color: var(--text-pure);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-black);
  color: var(--text-pure);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Minimal Fixed Header
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 2.5rem;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--text-pure);
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-item {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--text-sub);
  transition: var(--transition-fast);
  text-transform: uppercase;
  position: relative;
}

.nav-item:hover, .nav-item.active {
  color: var(--text-pure);
}

.contact-link {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--text-pure);
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-line);
  border-radius: 999px;
  transition: var(--transition-fast);
}

.contact-link:hover {
  background: var(--text-pure);
  color: var(--bg-black);
}

/* ==========================================================================
   Section 1: Hero (HELLO, I'M LEE YEONG MIN)
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6.5rem 2.5rem 2.5rem;
  background-color: var(--bg-black);
  overflow: hidden;
}

/* Layered Image Collage Behind Text (Reference Style) */
.hero-visual-collage {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 900px;
  height: 520px;
  pointer-events: none;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.collage-card {
  position: absolute;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85);
  transition: transform 0.6s ease;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.collage-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Left tilted card */
.collage-card.card-1 {
  width: 250px;
  height: 330px;
  left: 20%;
  top: 15%;
  transform: rotate(-7deg) scale(0.92);
  opacity: 0.55;
  filter: brightness(0.75);
}

/* Center main layered card (Shawshank / Main Poster) */
.collage-card.card-2 {
  width: 290px;
  height: 390px;
  left: 48%;
  top: 18%;
  transform: translate(-50%, 0) rotate(2deg);
  opacity: 0.75;
  z-index: 2;
  filter: brightness(0.85);
}

/* Right tilted card */
.collage-card.card-3 {
  width: 240px;
  height: 320px;
  right: 18%;
  top: 25%;
  transform: rotate(9deg) scale(0.9);
  opacity: 0.5;
  filter: brightness(0.7);
}

/* Center Giant Typography */
.hero-content {
  position: relative;
  z-index: 5;
  margin: auto 0;
  text-align: center;
  user-select: none;
}

.hero-giant-title {
  font-family: var(--font-display);
  font-size: clamp(3.8rem, 10.5vw, 9.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-row {
  display: block;
  text-shadow: 0 10px 40px rgba(0, 0, 0, 0.9);
}

.row-hello {
  font-weight: 400;
  color: #f0f2f5;
  letter-spacing: -0.02em;
}

.row-name-1, .row-name-2 {
  font-weight: 800;
  color: #ffffff;
}

/* Hero Footer Meta Bar */
.hero-meta-bar {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-line);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--text-sub);
}

.meta-item.left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-sub);
  transition: var(--transition-fast);
}

.scroll-cue:hover {
  color: var(--text-pure);
}

.scroll-icon {
  animation: bounceDown 1.8s infinite ease-in-out;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* ==========================================================================
   Section 2: GALLERY (4 Categories & Horizontal Carousel)
   ========================================================================== */
.gallery-section {
  position: relative;
  min-height: 100vh;
  background-color: var(--bg-deep);
  padding: 6rem 2.5rem 5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-top: 1px solid var(--border-line);
  overflow: hidden;
}

/* Gallery Top Bar */
.gallery-top-bar {
  max-width: 1600px;
  width: 100%;
  margin: 0 auto 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.category-tabs {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.cat-tab {
  background: transparent;
  border: 1px solid var(--border-line);
  color: var(--text-sub);
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cat-tab .tab-count {
  font-size: 0.72rem;
  opacity: 0.6;
}

.cat-tab:hover {
  border-color: var(--border-strong);
  color: var(--text-pure);
}

.cat-tab.active {
  background: var(--text-pure);
  color: var(--bg-black);
  border-color: var(--text-pure);
  font-weight: 600;
}

.cat-tab.active .tab-count {
  opacity: 0.85;
}

/* Prev / Next Circular Arrows */
.carousel-nav-arrows {
  display: flex;
  gap: 0.75rem;
}

.arrow-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-line);
  color: var(--text-pure);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.arrow-btn:hover {
  background: var(--text-pure);
  color: var(--bg-black);
  transform: scale(1.08);
}

.arrow-btn:active {
  transform: scale(0.95);
}

/* Active Item Details Bar */
.active-item-header {
  max-width: 1600px;
  width: 100%;
  margin: 0 auto 2rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line);
  padding-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.item-tag-index {
  font-family: var(--font-display);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.active-index-number {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
}

.active-index-total {
  font-size: 1rem;
  color: var(--text-muted);
}

.active-item-title-box {
  text-align: right;
}

.active-item-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.active-item-category {
  font-size: 0.8rem;
  color: var(--text-sub);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ==========================================================================
   Horizontal Centered Showcase Carousel (Reference Bottom Style)
   ========================================================================== */
.carousel-stage {
  width: 100%;
  padding: 2.5rem 0;
  overflow: hidden;
  position: relative;
  cursor: grab;
  user-select: none;
}

.carousel-stage:active {
  cursor: grabbing;
}

.carousel-track {
  display: flex;
  align-items: center;
  gap: 2rem;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

/* Individual Carousel Card */
.carousel-card {
  flex: 0 0 auto;
  width: 250px;
  height: 380px;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  opacity: 0.45;
  transform: scale(0.88);
  transition: var(--transition-smooth);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.carousel-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.carousel-card.pdf-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #181115 0%, #10121a 100%);
  color: #f87171;
  padding: 2rem;
  text-align: center;
  gap: 1rem;
}

.pdf-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Active Highlighted Center Card */
.carousel-card.active {
  width: 380px;
  height: 520px;
  opacity: 1;
  transform: scale(1);
  border-color: rgba(255, 255, 255, 0.65);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.9), 0 0 40px rgba(255, 255, 255, 0.08);
  z-index: 10;
}

.carousel-card.active img {
  transform: scale(1.02);
}

.carousel-card:hover:not(.active) {
  opacity: 0.75;
  transform: scale(0.92);
}

/* Card Badge/Label */
.card-mini-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 1.25rem 1rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.carousel-card.active .card-mini-info {
  opacity: 1;
}

.card-mini-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
}

.card-mini-cat {
  font-size: 0.75rem;
  color: var(--text-sub);
  text-transform: uppercase;
}

/* ==========================================================================
   Giant Section Title (08 GALLERY style from reference)
   ========================================================================== */
.giant-gallery-footer {
  max-width: 1600px;
  width: 100%;
  margin: 3.5rem auto 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  user-select: none;
  border-top: 1px solid var(--border-line);
  padding-top: 2rem;
}

.giant-num {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9.5vw, 7.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: #ffffff;
}

.giant-text {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9.5vw, 7.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: #ffffff;
  text-transform: uppercase;
}

/* ==========================================================================
   Lightbox Modal
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.lightbox-inner {
  position: relative;
  z-index: 2;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.lightbox-close-btn {
  position: fixed;
  top: 2rem;
  right: 2.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-line);
  color: #ffffff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: #ffffff;
  color: #000000;
  transform: rotate(90deg);
}

.lightbox-nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-line);
  color: #ffffff;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lightbox-nav-btn.prev { left: 2.5rem; }
.lightbox-nav-btn.next { right: 2.5rem; }

.lightbox-nav-btn:hover {
  background: #ffffff;
  color: #000000;
  transform: translateY(-50%) scale(1.1);
}

.lightbox-media-container {
  max-width: 80vw;
  max-height: 72vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.9);
}

.lightbox-pdf-view {
  width: 75vw;
  height: 70vh;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
}

.lightbox-pdf-view iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.lightbox-meta {
  margin-top: 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.lightbox-category-tag {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--text-sub);
  text-transform: uppercase;
}

.lightbox-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

.lightbox-btn {
  margin-top: 0.5rem;
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-sub);
  text-decoration: none;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border-line);
  border-radius: 999px;
  transition: var(--transition-fast);
}

.lightbox-btn:hover {
  background: #ffffff;
  color: #000000;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-black);
  padding: 3rem 2.5rem;
  border-top: 1px solid var(--border-line);
}

.footer-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.1em;
  font-size: 0.95rem;
}

.footer-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Responsive Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .site-header { padding: 1.25rem 1.5rem; }
  .hero-section { padding: 5.5rem 1.5rem 2rem; }
  .gallery-section { padding: 5rem 1.5rem 3rem; }
  .site-footer { padding: 2.5rem 1.5rem; }
  
  .carousel-card {
    width: 200px;
    height: 320px;
  }
  .carousel-card.active {
    width: 300px;
    height: 440px;
  }
  
  .collage-card.card-1 { width: 190px; height: 260px; left: 10%; }
  .collage-card.card-2 { width: 230px; height: 310px; }
  .collage-card.card-3 { width: 180px; height: 250px; right: 10%; }
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .hero-meta-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .hero-meta-bar .center { order: -1; }
  
  .carousel-card {
    width: 160px;
    height: 260px;
  }
  .carousel-card.active {
    width: 250px;
    height: 380px;
  }
  
  .lightbox-nav-btn {
    width: 44px;
    height: 44px;
  }
  .lightbox-nav-btn.prev { left: 1rem; }
  .lightbox-nav-btn.next { right: 1rem; }
  .lightbox-close-btn { top: 1.25rem; right: 1.25rem; }
}