/* CSS Reset & Variables */
:root {
  --color-warm-ivory: #F4F0E8;
  --color-soft-white: #FAF9F6;
  --color-charcoal-black: #171717;
  --color-deep-gray: #343434;
  --color-champagne-silver: #B9B3A7;
  
  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-ko: 'Nanum Myeongjo', serif;
  --font-sans: 'Inter', sans-serif;
  
  --transition-slow: 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-normal: 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden; /* We'll scroll the container instead */
  background-color: var(--color-warm-ivory);
  color: var(--color-charcoal-black);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

/* Scroll Container */
.scroll-container {
  width: 100%;
  height: 100vh;
  /* Use CSS Scroll Snap */
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  /* Hide scrollbar */
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}
.scroll-container::-webkit-scrollbar {
  display: none;
}

.section {
  min-height: 100vh;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  /* scroll-snap-align removed */
  overflow: hidden;
}

/* Vertical Navigation */
.vertical-nav {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 15px;
  z-index: 100;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: rgba(185, 179, 167, 0.4);
  transition: all 0.3s ease;
}

.nav-dot.active {
  background-color: var(--color-champagne-silver);
  height: 24px;
  border-radius: 4px;
}
.nav-dot.active-dark {
  background-color: var(--color-charcoal-black);
}

/* Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: var(--transition-slow);
}
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: var(--transition-slow);
}

.section.is-visible .fade-in-up,
.section.is-visible .fade-in-left,
.section.is-visible .fade-in-right {
  opacity: 1;
  transform: translate(0);
}

/* Luxury Stagger Animations */
.stagger-item,
.stagger-wrapper {
  opacity: 0;
  transform: translateY(40px);
  filter: blur(10px);
  transition: opacity 2s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 2s cubic-bezier(0.16, 1, 0.3, 1),
              filter 2s cubic-bezier(0.16, 1, 0.3, 1);
}

.section.is-visible .stagger-item,
.section.is-visible .stagger-wrapper {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* Stagger Delays */
.section.is-visible h1.stagger-item { transition-delay: 0.2s; }
.section.is-visible p.stagger-item { transition-delay: 0.6s; }
.section.is-visible .stagger-wrapper:nth-child(1) { transition-delay: 1.0s; }
.section.is-visible .stagger-wrapper:nth-child(2) { transition-delay: 1.3s; }
.section.is-visible .stagger-wrapper:nth-child(3) { transition-delay: 1.6s; }

/* Typography */
.section-title {
  font-family: var(--font-serif-en);
  font-size: 2.5rem;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  text-transform: uppercase;
  text-align: center;
}

.scale-up-title {
  opacity: 0;
  transform: scale(0.7) translateY(60px);
  transition: transform 2s cubic-bezier(0.16, 1, 0.3, 1), opacity 2s ease;
}

.section.is-visible .scale-up-title {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 32px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--color-champagne-silver);
  transition: all 0.4s ease;
  cursor: pointer;
}

.btn-outline {
  background: transparent;
  color: var(--color-soft-white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
  background: var(--color-soft-white);
  color: var(--color-charcoal-black);
}

.btn-filled {
  background: var(--color-champagne-silver);
  color: var(--color-soft-white);
  border-color: var(--color-champagne-silver);
}
.btn-filled:hover {
  background: transparent;
  color: var(--color-champagne-silver);
}

/* 1. Hero Section */
.hero {
  color: var(--color-soft-white);
}

.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  overflow: hidden;
  z-index: 1;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.1); /* Start slightly zoomed in */
  transition: transform 6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero.is-visible .hero-img {
  transform: scale(1); /* Zoom out effect on load */
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(to bottom, rgba(23, 23, 23, 0.1) 0%, rgba(23, 23, 23, 0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 20px;
  margin-top: -10vh;
}

.logo-text {
  font-family: 'Cinzel', serif;
  font-size: 4.5rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
  color: var(--color-white);
  /* Enhanced drop shadow for legibility */
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6), 0 1px 5px rgba(0, 0, 0, 0.8);
}

.subtitle {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  line-height: 1.6;
  margin-bottom: 4rem;
  text-transform: uppercase;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6), 0 1px 3px rgba(0, 0, 0, 0.8);
}

.slogan {
  margin-bottom: 3rem;
}

.eng-slogan {
  font-family: var(--font-serif-en);
  font-size: 1.8rem;
  font-style: italic;
  margin-bottom: 0.5rem;
}

.kor-slogan {
  font-family: var(--font-serif-ko);
  font-size: 1.1rem;
  font-weight: 400;
  opacity: 0.9;
}

.hero-images {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: center;
  margin-top: 1rem;
  width: 115%;
  margin-left: -7.5%;
  max-width: none;
  height: 55vh;
}

.stagger-wrapper {
  height: 100%;
  flex: 1;
  max-width: 39%;
  display: flex;
  justify-content: center;
}

.hero-img-container {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  border: 3px solid #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  transition: transform 0.4s ease, filter 0.4s ease;
  filter: grayscale(30%);
}

.hero-img-container:hover {
  transform: translateY(-10px) scale(1.03);
  filter: grayscale(0%);
}

.hero-mini-img {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.hero-mini-img.active {
  opacity: 1;
}

.scroll-indicator {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  height: 25px; /* Minimized height */
  width: 1px;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 100%;
  background: rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-soft-white);
  animation: scrollAnim 2s infinite ease-in-out;
}

@keyframes scrollAnim {
  0% { transform: translateY(-100%); }
  50% { transform: translateY(0); }
  100% { transform: translateY(100%); }
}

.portfolio-wrapper {
  position: relative;
  max-height: 1200px; /* limits to roughly half or a bit less */
  overflow: hidden;
  transition: max-height 1.2s ease-in-out;
  width: 100%;
}

.portfolio-wrapper.expanded {
  max-height: 20000px; /* large enough to show all images */
}

.portfolio-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 300px;
  background: linear-gradient(to bottom, rgba(10,10,10,0) 0%, rgba(10,10,10,1) 90%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 30px;
  z-index: 10;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.portfolio-wrapper.expanded .portfolio-overlay {
  opacity: 0;
  pointer-events: none;
}

.btn-view-all {
  pointer-events: auto;
  background: var(--color-soft-white);
  color: var(--color-charcoal-black);
  border: 1px solid var(--color-soft-white);
  padding: 15px 40px;
  font-family: var(--font-sans);
  font-size: 1rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
  box-shadow: 0 4px 15px rgba(0,0,0,0.5);
  font-weight: 500;
}

.btn-view-all:hover {
  background: transparent;
  color: var(--color-soft-white);
}

/* 2. About Section */
.about {
  background-color: var(--color-soft-white);
}

.about-container {
  display: flex;
  align-items: center;
  max-width: 1200px;
  width: 90%;
  margin: 0 auto;
  gap: 8%;
}

.about-image-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-img {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: grayscale(20%);
  transition: filter 1s ease;
}

.about-img:hover {
  filter: grayscale(0%);
}

.about-text-wrapper {
  flex: 1;
}

.about-desc {
  font-family: var(--font-serif-ko);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-deep-gray);
  margin-bottom: 2rem;
}

.about-subdesc {
  font-family: var(--font-serif-en);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-champagne-silver);
}

/* 3. Portfolio Section */
.portfolio {
  background-color: var(--color-charcoal-black);
  flex-direction: column;
  padding: 100px 0;
}

.portfolio .section-title {
  color: var(--color-soft-white);
}

/* =========================================
   Portfolio Section (Masonry)
========================================= */
#masonry-container {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 80vh;
}

.masonry-item-wrapper {
  position: absolute;
  will-change: transform, width, height, opacity;
  padding: 6px;
  cursor: pointer;
  top: 0;
  left: 0;
}

.masonry-item-wrapper > .masonry-item-img {
  position: relative;
  background-size: cover;
  background-position: center center;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  box-shadow: 0px 10px 50px -10px rgba(0, 0, 0, 0.2);
}

.portfolio-header {
  text-align: center;
  margin-bottom: 2rem;
}

.gallery-wrapper {
  width: 100%;
  flex: 1;
  overflow-y: auto; /* Internal scroll for gallery */
  padding: 0 5%;
  /* Hide scrollbar for aesthetics, allow wheel scroll */
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.gallery-wrapper::-webkit-scrollbar {
  display: none;
}

/* Asymmetric Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 250px;
  gap: 15px;
  padding-bottom: 50px; /* Space at bottom */
}

.gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background-color: #e5e0d8;
}

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

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; width: 100%;
  padding: 15px;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  color: var(--color-soft-white);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-caption {
  opacity: 1;
}

/* Masonry-like layout using spans */
.gallery-item.tall { grid-row: span 2; }
.gallery-item.wide { grid-column: span 2; }
.gallery-item.large { grid-column: span 2; grid-row: span 2; }

/* 4. Profile Section */
.profile {
  background-color: var(--color-soft-white);
}

.profile-container {
  max-width: 800px;
  width: 90%;
  margin: 0 auto;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 40px;
  margin-bottom: 40px;
  border-top: 1px solid var(--color-champagne-silver);
  border-bottom: 1px solid var(--color-champagne-silver);
  padding: 40px 0;
}

.profile-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.profile-item .label {
  font-family: var(--font-serif-en);
  font-size: 0.9rem;
  color: var(--color-champagne-silver);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.profile-item .value {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-charcoal-black);
}

.profile-item .value a {
  position: relative;
}

.profile-item .value a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; width: 100%; height: 1px;
  background-color: var(--color-charcoal-black);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}
.profile-item .value a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.profile-actions {
  text-align: center;
}

.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}
.btn-outline.download-btn {
  color: var(--color-charcoal-black);
  border-color: var(--color-charcoal-black);
}
.btn-outline.download-btn:hover {
  background: var(--color-charcoal-black);
  color: var(--color-soft-white);
}

/* 5. Philosophy Section */
.philosophy {
  color: var(--color-soft-white);
  text-align: center;
}

.philosophy-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 1;
}

.philosophy-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.6);
}

.philosophy-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(23, 23, 23, 0.5);
  z-index: 2;
}

/* Subtle light sweep effect on overlay */
.philosophy-overlay::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 50%; height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.05), transparent);
  transform: skewX(-20deg);
  animation: sweep 8s infinite;
}

@keyframes sweep {
  0% { left: -100%; }
  100% { left: 200%; }
}

.philosophy-content {
  position: relative;
  z-index: 3;
  padding: 0 20px;
}

.phil-title {
  font-family: var(--font-serif-en);
  font-size: 3.5rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.phil-kor {
  font-family: var(--font-serif-ko);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.phil-sub {
  font-family: var(--font-serif-en);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-champagne-silver);
}

/* 6. Contact Section */
.contact {
  background-color: var(--color-warm-ivory);
  flex-direction: column;
}

.contact-container {
  max-width: 600px;
  width: 90%;
  text-align: center;
  margin: auto; /* center vertically in flex */
}

.contact-sub {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--color-champagne-silver);
}

.contact-desc {
  font-family: var(--font-serif-ko);
  font-size: 1rem;
  margin-bottom: 2.5rem;
  color: var(--color-deep-gray);
}

.contact-info {
  margin-bottom: 3rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.8;
}

.contact-info a {
  text-decoration: underline;
  text-decoration-color: var(--color-champagne-silver);
  text-underline-offset: 4px;
}

.contact-form {
  text-align: left;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-champagne-silver);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-charcoal-black);
  outline: none;
  transition: border-color 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(52, 52, 52, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--color-charcoal-black);
}

.form-submit {
  width: 100%;
  margin-top: 10px;
  background: var(--color-charcoal-black);
  border-color: var(--color-charcoal-black);
}
.form-submit:hover {
  color: var(--color-charcoal-black);
  border-color: var(--color-charcoal-black);
}

.form-status {
  margin-top: 15px;
  font-size: 0.85rem;
  text-align: center;
  height: 20px; /* reserve space */
}

.footer {
  position: absolute;
  bottom: 20px;
  left: 0; width: 100%;
  text-align: center;
  z-index: 3;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-champagne-silver);
  letter-spacing: 0.05em;
}

/* =========================================
   Photo Viewer Modal (Lightweight)
========================================= */
.photo-viewer {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(5, 5, 5, 0.97);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.photo-viewer.active {
  opacity: 1;
  pointer-events: auto;
}

.photo-viewer__close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 2.5rem;
  font-weight: 300;
  cursor: pointer;
  z-index: 3000;
  transition: color 0.3s ease, transform 0.3s ease;
  line-height: 1;
}

.photo-viewer__close:hover {
  color: #fff;
  transform: scale(1.15);
}

.photo-viewer__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3000;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.photo-viewer__arrow:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.4);
}

.photo-viewer__arrow--prev { left: 16px; }
.photo-viewer__arrow--next { right: 16px; }

.photo-viewer__main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 60px 70px 10px;
  overflow: hidden;
}

.photo-viewer__img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 4px;
  transition: opacity 0.3s ease;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
}

.photo-viewer__counter {
  color: rgba(255,255,255,0.5);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 8px 0 6px;
  text-align: center;
}

.photo-viewer__thumbs {
  display: flex;
  gap: 6px;
  padding: 6px 16px 16px;
  overflow-x: auto;
  max-width: 100%;
  justify-content: center;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.photo-viewer__thumbs::-webkit-scrollbar { display: none; }

.photo-viewer__thumb {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 4px;
  object-fit: cover;
  cursor: pointer;
  opacity: 0.4;
  border: 2px solid transparent;
  transition: opacity 0.25s ease, border-color 0.25s ease;
}

.photo-viewer__thumb:hover {
  opacity: 0.7;
}

.photo-viewer__thumb.active {
  opacity: 1;
  border-color: rgba(255,255,255,0.8);
}


/* Responsive Design */
@media (max-width: 1024px) {
  .logo-text { font-size: 3.5rem; }
  .phil-title { font-size: 2.5rem; }
  
  .about-container { flex-direction: column; gap: 40px; }
  .about-image-wrapper { width: 100%; height: 50vh; }
  
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .gallery-item.large { grid-column: span 2; grid-row: span 1; }
}

@media (max-width: 768px) {
  /* Prevent horizontal scroll on mobile */
  html, body { overflow-x: hidden; }
  
  .logo-text { font-size: 2.5rem; }
  .subtitle { font-size: 0.85rem; }
  .eng-slogan { font-size: 1.4rem; }
  
  .section-title { font-size: 2.2rem; }
  .phil-title { font-size: 2rem; }
  
  .vertical-nav { display: none; } /* Hide dots on mobile */
  
  .gallery-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 200px; }
  .gallery-item.wide, .gallery-item.large { grid-column: span 2; }
  
  .profile-grid { grid-template-columns: 1fr; gap: 15px; }
  
  .hide-on-mobile { display: none !important; }
  .show-on-mobile { display: block !important; }
  .hero-images { 
    gap: 15px; 
    height: 48vh; 
    width: calc(100% + 40px); 
    margin-left: -20px; 
  }
  .stagger-wrapper { max-width: calc(50% - 8px); }

  /* Mobile Photo Viewer */
  .photo-viewer__main {
    padding: 50px 10px 5px;
  }
  .photo-viewer__arrow {
    width: 36px;
    height: 36px;
  }
  .photo-viewer__arrow--prev { left: 6px; }
  .photo-viewer__arrow--next { right: 6px; }
  .photo-viewer__thumbs {
    justify-content: flex-start;
    padding: 4px 10px 10px;
  }
  .photo-viewer__thumb {
    width: 44px;
    height: 44px;
    min-width: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}