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

:root {
  --black: #0a0a0b;
  --surface: #111113;
  --glass: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(61, 153, 112, 0.5);
  --text: #e8e8e8;
  --text-dim: #666;
  --text-muted: #444;
  --blue: #4a6fa5;
  --green: #3d9970;
  --green-dim: rgba(61, 153, 112, 0.15);
  --radius: 3px;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  --sans: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --card-w: clamp(240px, 32vw, 360px);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  font-weight: 300;
  background: var(--black);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background */
.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
}

.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.07) 2px,
    rgba(0, 0, 0, 0.07) 4px
  );
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 998;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.glow--blue {
  width: 45vw;
  height: 45vw;
  top: -12vw;
  right: -8vw;
  background: var(--blue);
  opacity: 0.14;
}

.glow--green {
  width: 38vw;
  height: 38vw;
  bottom: 5vw;
  left: -10vw;
  background: var(--green);
  opacity: 0.1;
}

/* Header */
.header {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.5rem 2rem;
  padding: 2.5rem 2.5rem 1.5rem;
  align-items: end;
}

.header__row {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--green);
}

.header__index {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

.header__main {
  align-self: end;
}

.header__title {
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 0.95;
  color: var(--text);
}

.header__sub {
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.header__scroll-hint {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  animation: pulseHint 2.5s ease-in-out infinite;
}

.header__scroll-line {
  display: block;
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

@keyframes pulseHint {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* Viewer + filmstrip */
.viewer {
  position: relative;
  z-index: 1;
  padding-bottom: 1rem;
}

.gallery {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  padding: 2rem 2.5rem 1.5rem;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: 2.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  min-height: clamp(420px, 72vh, 680px);
}

.gallery::-webkit-scrollbar {
  display: none;
}

/* Staggered wave layout */
.card {
  flex: 0 0 var(--card-w);
  scroll-snap-align: center;
  position: relative;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  padding: 0;
  text-align: left;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s;
}

.card:nth-child(1) { transform: translateY(-28px); }
.card:nth-child(2) { transform: translateY(36px); }
.card:nth-child(3) { transform: translateY(-12px); }
.card:nth-child(4) { transform: translateY(48px); }

.card:hover,
.card.is-active {
  border-color: var(--border-hover);
  box-shadow: 0 0 40px rgba(61, 153, 112, 0.12), 0 24px 48px rgba(0, 0, 0, 0.4);
  z-index: 2;
}

.card:nth-child(1):hover,
.card:nth-child(1).is-active { transform: translateY(-36px) scale(1.02); }
.card:nth-child(2):hover,
.card:nth-child(2).is-active { transform: translateY(28px) scale(1.02); }
.card:nth-child(3):hover,
.card:nth-child(3).is-active { transform: translateY(-20px) scale(1.02); }
.card:nth-child(4):hover,
.card:nth-child(4).is-active { transform: translateY(40px) scale(1.02); }

.card:focus-visible {
  outline: 1px solid var(--green);
  outline-offset: 3px;
}

.card__img-wrap {
  position: relative;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: #080809;
}

.card__img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 11, 0.5) 0%,
    transparent 30%,
    transparent 70%,
    rgba(10, 10, 11, 0.6) 100%
  );
  pointer-events: none;
  transition: opacity 0.3s;
}

.card:hover .card__img-wrap::after {
  opacity: 0.7;
}

.card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.8) contrast(1.1) brightness(0.88) hue-rotate(-10deg);
  transition: filter 0.4s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.card:hover .card__img,
.card.is-active .card__img {
  filter: saturate(0.95) contrast(1.12) brightness(0.94) hue-rotate(-6deg);
  transform: scale(1.04);
}

.card__num {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  font-family: var(--mono);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.12);
  transition: color 0.3s;
  pointer-events: none;
}

.card:hover .card__num,
.card.is-active .card__num {
  color: rgba(61, 153, 112, 0.35);
}

.card__meta {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 1rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.5rem;
}

.card__name {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text);
}

.card__hint {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  transition: color 0.2s;
}

.card:hover .card__hint,
.card.is-active .card__hint {
  color: var(--green);
}

/* Progress rail */
.viewer__rail {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 2.5rem 0;
}

.viewer__track {
  flex: 1;
  height: 2px;
  background: var(--border);
  position: relative;
  overflow: visible;
}

.viewer__thumb {
  position: absolute;
  top: 50%;
  left: 0;
  width: 25%;
  height: 2px;
  background: var(--green);
  transform: translateY(-50%);
  transition: left 0.15s ease-out;
  box-shadow: 0 0 12px rgba(61, 153, 112, 0.5);
}

.viewer__thumb::before {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translate(50%, -50%);
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
}

.viewer__position {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  white-space: nowrap;
}

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  padding: 2.5rem 2rem 3rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}

.footer__sep {
  color: var(--text-muted);
}

/* Lightbox */
.lightbox {
  border: none;
  padding: 0;
  max-width: none;
  max-height: none;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: rgba(10, 10, 11, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.lightbox::backdrop {
  background: rgba(0, 0, 0, 0.75);
}

.lightbox__close {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 10;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--glass);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.lightbox__close:hover {
  border-color: var(--border-hover);
  color: var(--green);
}

.lightbox__nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--glass);
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.lightbox__nav:hover {
  border-color: var(--border-hover);
  color: var(--text);
}

.lightbox__nav--prev { left: 1.25rem; }
.lightbox__nav--next { right: 1.25rem; }

.lightbox__figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 4rem 3rem 2rem;
}

.lightbox__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.lightbox__index {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--green);
}

.lightbox__name {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.lightbox__img {
  max-width: min(90vw, 720px);
  max-height: calc(100dvh - 160px);
  object-fit: contain;
  border: 1px solid var(--border);
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.lightbox__caption {
  margin-top: 1.25rem;
}

.lightbox__download {
  display: inline-flex;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.lightbox__download:hover {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green);
}

@media (max-width: 768px) {
  .header {
    grid-template-columns: 1fr;
    padding: 2rem 1.25rem 1rem;
  }

  .header__scroll-hint {
    display: none;
  }

  .gallery {
    padding: 1.5rem 1.25rem 1rem;
    scroll-padding-inline: 1.25rem;
    gap: 1rem;
    min-height: 65vh;
  }

  .card {
    flex: 0 0 min(78vw, 300px);
  }

  .card:nth-child(n) {
    transform: translateY(0);
  }

  .card:nth-child(odd) {
    transform: translateY(-16px);
  }

  .card:nth-child(even) {
    transform: translateY(16px);
  }

  .card:hover,
  .card.is-active {
    transform: translateY(0) scale(1.02);
  }

  .viewer__rail {
    padding: 0.5rem 1.25rem 0;
  }

  .footer {
    flex-direction: column;
    gap: 0.35rem;
    padding: 2rem 1.25rem 2.5rem;
  }

  .footer__sep {
    display: none;
  }

  .lightbox__figure {
    padding: 3.5rem 1rem 1.5rem;
  }

  .lightbox__nav {
    width: 38px;
    height: 38px;
  }

  .lightbox__nav--prev { left: 0.5rem; }
  .lightbox__nav--next { right: 0.5rem; }
}