/* ======================
   global variables & base styles
   ====================== */
:root {
  /* layout */
  --section-height: 80vh;
  
  /* colors */
  --accent-color: #c0c0c0;
  --dark-bg: #333333;
  --glass-bg: rgba(33, 33, 33, 0.65);
  --text-color: #f0f0f0;
  
  /* z-index management */
  --z-banner: 1000;
  --z-dots: 1001;
  --z-nav-group: 1002;
  --z-projects-menu: 1003;
  --z-lightbox: 2000;
  
  /* transitions */
  --transition-default: 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  --transition-fast: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--dark-bg);
  color: var(--text-color);
  font-family: "work sans", sans-serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  line-height: 1.6;
  overscroll-behavior-y: contain;
}


/* ======================
   header & navigation system
   ====================== */
/* banner */
.artist-banner {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  text-align: center;
  font-size: 1.7rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  z-index: var(--z-banner);
}

.artist-banner a {
  color: inherit;
  text-decoration: none;
}

/* main navigation group */
.nav-group {
  position: fixed;
  left: 1.5rem;
  top: 6.5rem;
  z-index: var(--z-nav-group);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  pointer-events: none; /* allows clicks through to elements below */
}

/* vertical navigation links */
.nav-link {
  writing-mode: sideways-lr;
  padding: 10px 3px 10px 2px;
  margin: 0;
  color: var(--text-color);
  letter-spacing: 0.1em;
  font-size: 0.95rem;
  cursor: pointer;
  background-color: #121212;
  opacity: .7;
  border-radius: 4px;
  pointer-events: auto; /* enable interaction */
  transition: opacity var(--transition-fast);
}

.nav-link:hover {
  opacity: 0.8;
}

/* projects dropdown menu */
.projects-menu {
  position: fixed;
  left: 4rem;
  top: 6.5rem;
  width: auto;
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  padding: 0.8rem;
  border-radius: 4px;
  border: 1px solid rgba(160, 160, 160, 0.15);
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
  opacity: 0;
  transform: translatey(-5px);
  pointer-events: none;
  z-index: var(--z-projects-menu);
  transition: all 0.25s cubic-bezier(0.23, 1, 0.32, 1);
}

.projects-menu.visible {
  opacity: 1;
  transform: translatey(0);
  pointer-events: all;
}

.project-link {
  display: block;
  color: var(--text-color);
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  font-size: 0.9rem;
  opacity: 0.9;
  transition: all var(--transition-default);
}

.project-link:hover {
  background: rgba(255,255,255,0.03);
  opacity: 1;
  padding-left: 2rem;
}

/* navigation dots */
.nav-dots {
  position: fixed;
  left: 2rem;
  top: calc(50% + 80px);
  transform: translatey(-50%);
  z-index: var(--z-dots);
  opacity: .5;
}

.dot {
  display: block;
  width: 10px;
  height: 10px;
  background: #a0a0a0;
  border-radius: 50%;
  margin: 1.2rem 0;
  transition: all var(--transition-default);
}

.dot.active {
  background: var(--accent-color);
  transform: scale(1.8);
  background: #ffffff;
}

/* info link (bottom left) */
.info-link {
  position: fixed;
  left: 1.5rem;
  bottom: 2.5rem;
  writing-mode: sideways-lr;
  color: var(--text-color);
  text-decoration: none;
  letter-spacing: 0.1em;
  font-size: 0.95rem;
  z-index: var(--z-banner);
  padding: 1rem 0rem;
  background-color: #121212;
  opacity: .7;
  border-radius: 4px;
}


/* ======================
   content & projects
   ====================== */

/* hero image container with fade-in animation */
section {
  height: var(--section-height);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translatey(40px);
  margin: 7rem 0rem 3rem 2.7rem;
  scroll-margin-top: 70px;
  will-change: transform, opacity;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

section.active {
  opacity: 1;
  transform: translatey(0);
}

.landing-image {
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  padding-top: 0rem;
  justify-content: center;
}

.hero-image {
  width: 85%;
  max-width: 80rem;
  max-height: 42rem;
  object-fit: contain;
  margin: 0 auto;
  display: block;
  transition: width var(--transition-default);
}

/* project info panel */
.project-info {
  margin: 4rem auto;
  padding: 2rem;
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
  max-width: 680px;
}

.project-info-hook {
  display: inline-block;
  font-weight: 300;
  width: 80%;
  text-align: justify;
  margin-left: 5%;
}

/* image gallery grid */
.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin: 0 auto;
  max-width: 92vw;
  position: relative;
  padding: 3rem 0 3rem 1.5rem;
}

.gallery-image {
  height: 25rem;
  width: fit-content;
  object-fit: cover;
  flex-shrink: 0;
}


/* ========
   lightbox
   ======== */
/* 
  - semi-transparent overlay
  - navigation arrows with extended hit areas
  - dynamic image counter
  - fade-in/fade-out transitions
*/
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0);
  z-index: var(--z-lightbox);
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-default), visibility var(--transition-default);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
  background-color: rgba(0, 0, 0, 0.8);
}

.lightbox-image {
  max-width: 90%;
  max-height: 80%;
  object-fit: contain;
  opacity: 0;
  transition: opacity var(--transition-default);
}

.lightbox-image.active {
  opacity: 1;
}

/* navigation arrows with extended hitboxes */
.prev::before, 
.next::before {
  content: '';
  position: absolute;
  top: -200px;
  bottom: -200px;
  width: 60px; 
}

.prev::before {
  right: -10px; 
}

.next::before {
  left: -10px; 
}

/* lightbox image counter */
.image-counter {
  position: absolute;
  top: 15px;
  color: white;
  font-size: 1rem;
  background: rgba(0, 0, 0, 0.5);
  padding: 5px 10px;
  border-radius: 10px;
  opacity: 0;
  transition: opacity var(--transition-default);
  z-index: var(--z-lightbox);
}

.image-counter.active {
  opacity: 1;
}

/* lightbox image captions */
.lightbox-caption {
  position: absolute;
  bottom: 15px;
  color: var(--text-light);
  text-align: center;
  max-width: 80%;
  padding: 5px 10px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  font-size: .9rem;
  opacity: 0;
  transition: opacity var(--transition-default);
  z-index: var(--z-lightbox);
}

.lightbox-caption.active {
    opacity: 1;
}

/* arrow navigation */
.prev, 
.next {
  position: absolute;
  color: white;
  font-size: 3rem;
  cursor: pointer;
  user-select: none;
  top: 50%;
  transform: translatey(-50%);
}

.prev {
  left: 30px;
}

.next {
  right: 30px;
}


/* ==========
   info page
   ========== */
.info-content {
  margin-top: 4rem;
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 3.5rem;
}

.info-image {
  max-width: 100%;
  margin-top: 4rem;
}

.info-content h1 {
  color: var(--accent-color);
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  margin: 2rem 0 1rem;
  border-bottom: 1px solid rgba(160, 160, 160, 0.2);
  padding-bottom: 0.5rem;
}

.info-content ul {
  list-style: none;
  padding-left: 1.5rem;
}

.info-content li {
  margin: 0.8rem 0;
  position: relative;
}

.info-content li::before {
  content: "—";
  position: absolute;
  left: -1.5rem;
  color: var(--accent-color);
}

/* contact elements */
.contact-link {
  color: var(--accent-color);
  text-decoration: none;
  font-size: 1rem;
  border: 1px solid var(--accent-color);
  padding: 0.8rem 1.2rem;
  border-radius: 3px;
  display: inline-block;
  text-align: center;
  margin: .4rem;
  z-index: var(--z-projects-menu);
  transition: all var(--transition-default);
}

.contact-link:hover {
  background: rgba(204, 204, 204, 0.1);
  transform: translatey(-2px);
}


/* =================
   mobile/responsive
   ================= */

@media (max-width: 768px) {
  /* section height adjustment */
  section {
    height: min(80vh, 100svh);
  }
  
  /* image adjustments */
  .hero-image {
    width: 95%;
  }
  
  .gallery-image {
    height: auto;
    width: clamp(120px, 25vw, 300px);
    object-fit: contain;
  }
  
  .lightbox-image {
    max-width: 70%;
    max-height: 90%;
  }
  
  /* navigation repositioning */
  .nav-group,
  .nav-dots,
  .info-link {
    left: 1rem;
  }
  
  .projects-menu {
    left: 3rem;
    width: 180px;
  }
  
  /* text sizing */
  .nav-link,
  .info-link {
    font-size: 0.85rem;
  }
  
  /* arrow sizing */
  .prev, 
  .next {
    font-size: 2rem;
  }
  
  .prev {
    left: 10px;
  }
  
  .next {
    right: 10px;
  }
  
  /* content spacing */
  .project-info {
    margin-left: 3rem;
    margin-right: 1rem;
  }
  
  .gallery {
    margin-left: 2rem;
  }
  
  /* contact button contrast */
  .contact-link {
    background: rgba(204, 204, 204, .1);
  }
}