@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700;800&family=Spectral:ital,wght@0,400;0,600;1,400&family=Noto+Sans+KR:wght@300;400;500&display=swap');

:root {
  /* Color System */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f9f9f9;
  --color-bg-dark: #111111;
  --color-text-primary: #111111;
  --color-text-secondary: #777777;
  --color-text-light: #ffffff;
  
  --color-accent-violet: #3d17dc;
  --color-accent-coral: #e78c7d;
  --color-accent-mint: #93e6b4;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-light: rgba(255, 255, 255, 0.1);

  /* Fonts */
  --font-sans: 'Montserrat', sans-serif;
  --font-serif: 'Spectral', serif;
  --font-body: 'Noto Sans KR', sans-serif;
  
  /* Layout */
  --header-height: 80px;
  --container-width: 1200px;
  --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  cursor: none; /* Hide default cursor for custom cursor */
}

body.dark-mode {
  --color-bg-primary: #111111;
  --color-bg-secondary: #1a1a1a;
  --color-bg-dark: #ffffff;
  --color-text-primary: #ffffff;
  --color-text-secondary: #aaaaaa;
  --color-text-light: #111111;
  --color-border: rgba(255, 255, 255, 0.15);
}

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

/* Custom Mouse Cursor */
.cursor-dot, .cursor-dot-outline {
  position: fixed;
  pointer-events: none;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 10010;
  opacity: 0;
  transition: opacity 0.3s ease, width 0.3s ease, height 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.cursor-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent-violet);
}

.cursor-dot-outline {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-accent-violet);
}

/* Hover state for links */
body.hovered-link .cursor-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-accent-coral);
}

body.hovered-link .cursor-dot-outline {
  width: 60px;
  height: 60px;
  border-color: var(--color-accent-coral);
  background-color: rgba(231, 140, 125, 0.08);
}

/* Page Transition Mask */
.transition-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  pointer-events: none;
}

.mask-slice {
  flex: 1;
  background-color: var(--color-bg-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.85, 0, 0.15, 1);
}

.mask-slice:nth-child(2) { transition-delay: 0.1s; }
.mask-slice:nth-child(3) { transition-delay: 0.2s; }

.transition-mask.active .mask-slice {
  transform: scaleX(1);
}

/* Common Layout Elements */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

body.dark-mode header {
  background-color: rgba(17, 17, 17, 0.8);
  border-bottom: 1px solid var(--color-border-light);
}

.logo {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.logo span {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  text-transform: lowercase;
  color: var(--color-accent-violet);
  margin-left: 5px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 30px;
}

nav a {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  padding: 5px 0;
  color: var(--color-text-secondary);
  transition: var(--transition-smooth);
}

body.dark-mode nav a {
  color: #aaa;
}

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

body.dark-mode nav a:hover, body.dark-mode nav a.active {
  color: var(--color-text-light);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent-violet);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

nav a:hover::after, nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Page Container */
main {
  padding-top: calc(var(--header-height) + 40px);
  min-height: 100vh;
  padding-bottom: 80px;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Editorial Hero Typography */
.editorial-title {
  margin-top: 40px;
  margin-bottom: 60px;
}

.editorial-title h1 {
  font-family: var(--font-sans);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.editorial-title span {
  display: block;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  text-transform: none;
  color: var(--color-accent-violet);
  padding-left: 10%;
  margin-top: 10px;
}

/* Grid & Cards (Placeholders) */
.grid-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  padding: 30px;
  border-radius: 4px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

body.dark-mode .card {
  background-color: #1a1a1a;
  border-color: var(--color-border-light);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.card-img-placeholder {
  width: 100%;
  height: 250px;
  background-color: #eee;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 700;
  color: #bbb;
  border-radius: 2px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

body.dark-mode .card-img-placeholder {
  background-color: #2b2b2b;
  color: #555;
}

.card-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

body.dark-mode .card-desc {
  color: #999;
}

/* Footer */
footer {
  width: 100%;
  padding: 60px 4% 40px 4%;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

body.dark-mode footer {
  background-color: #151515;
  border-top: 1px solid var(--color-border-light);
  color: #888;
}

.footer-socials {
  display: flex;
  gap: 20px;
}

.footer-socials a {
  font-family: var(--font-sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-socials a:hover {
  color: var(--color-accent-violet);
}

/* Intro (index.html specific) */
.intro-container {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
  position: relative;
  overflow: hidden;
}

.intro-bg-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  filter: grayscale(100%);
  transition: var(--transition-smooth);
}

.intro-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 800px;
  padding: 20px;
}

.intro-title {
  font-family: var(--font-sans);
  font-size: clamp(3.5rem, 8vw, 7.5rem);
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  margin-bottom: 30px;
}

.intro-title span {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  text-transform: lowercase;
  color: var(--color-accent-coral);
}

.intro-enter-btn {
  display: inline-block;
  padding: 15px 40px;
  border: 1px solid var(--color-text-light);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: var(--transition-smooth);
  margin-top: 20px;
}

.intro-enter-btn:hover {
  background-color: var(--color-text-light);
  color: var(--color-bg-dark);
  transform: scale(1.05);
}

/* Responsive Grid columns */
.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }

@media (max-width: 991px) {
  .col-8, .col-6, .col-4, .col-3 { grid-column: span 6; }
}

@media (max-width: 767px) {
  .col-8, .col-6, .col-4, .col-3 { grid-column: span 12; }
  header {
    flex-direction: column;
    height: auto;
    padding: 20px;
    gap: 15px;
  }
  nav ul {
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  main {
    padding-top: 140px;
  }
  footer {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  cursor: none;
}

.theme-toggle-btn:hover {
  background-color: var(--color-accent-violet);
  color: white;
  border-color: var(--color-accent-violet);
}

.theme-toggle-btn .sun-icon {
  display: none;
}
.theme-toggle-btn .moon-icon {
  display: block;
}

body.dark-mode .theme-toggle-btn .sun-icon {
  display: block;
  stroke: var(--color-text-primary);
}
body.dark-mode .theme-toggle-btn .moon-icon {
  display: none;
}

/* Project Detail Modal */
.project-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(17, 17, 17, 0.95);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  padding: 40px;
}

.project-modal.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content-wrap {
  width: 100%;
  max-width: 1100px;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  position: relative;
  transform: scale(0.9);
  transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  display: flex;
  max-height: 85vh;
  overflow: hidden;
}

.project-modal.active .modal-content-wrap {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 25px;
  right: 25px;
  background: none;
  border: none;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-text-primary);
  z-index: 10;
  transition: var(--transition-smooth);
}

.modal-close-btn:hover {
  color: var(--color-accent-violet);
  transform: rotate(90deg);
}

.modal-media-side {
  flex: 1.2;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  max-height: 85vh;
}

.modal-media-side img, .modal-media-side video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.modal-info-side {
  flex: 1;
  padding: 50px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.modal-info-header {
  margin-bottom: 30px;
}

.modal-category {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-accent-coral);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.modal-title {
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.2;
  text-transform: uppercase;
}

.modal-body {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.modal-footer {
  border-top: 1px solid var(--color-border);
  padding-top: 30px;
}

.modal-pdf-link {
  display: inline-block;
  padding: 12px 25px;
  background-color: var(--color-accent-violet);
  color: white;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 2px;
}

.modal-pdf-link:hover {
  background-color: #2b0fb2;
}

@media (max-width: 991px) {
  .modal-content-wrap {
    flex-direction: column;
    max-height: 90vh;
  }
  .modal-media-side {
    height: 300px;
    flex: none;
  }
  .modal-info-side {
    padding: 30px;
  }
}