/* =========================================================
   gallery.css — Page-specific styles (gallery top)
   ---------------------------------------------------------
   header / hero / tag-nav / gallery / card / thumbnails / footer.
   Depends on tokens.css + base.css.
   ========================================================= */

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg);
  border-bottom: var(--hairline) solid var(--line);
  backdrop-filter: blur(8px);
  transition: background-color var(--duration-base) var(--ease-out-quart),
              border-color var(--duration-base) var(--ease-out-quart);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-5);
}

.brand {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-3);
}
.brand__mark {
  font-size: var(--text-sm);
  color: var(--fg-muted);
}
.brand__divider {
  display: inline-block;
  width: 1.25rem;
  height: 1px;
  background-color: var(--fg-muted);
  transform: translateY(-3px);
}
.brand__suffix {
  font-size: var(--text-2xs);
  color: var(--fg-faint);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Theme toggle: two pill labels with hairline */
.theme-toggle {
  display: inline-flex;
  align-items: stretch;
  border: var(--hairline) solid var(--line-strong);
  border-radius: 999px;
  padding: 3px;
  gap: 0;
  position: relative;
}

.theme-toggle__btn {
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-5);
  border-radius: 999px;
  color: var(--fg-muted);
  transition: color var(--duration-base) var(--ease-out-quart);
  position: relative;
  z-index: 1;
}

.theme-toggle__btn[aria-pressed="true"] {
  color: var(--bg);
}

.theme-toggle__pill {
  position: absolute;
  top: 3px;
  bottom: 3px;
  background-color: var(--fg);
  border-radius: 999px;
  transition:
    transform var(--duration-base) var(--ease-out-quart),
    width var(--duration-base) var(--ease-out-quart),
    background-color var(--duration-base) var(--ease-out-quart);
  z-index: 0;
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding-block: var(--space-9) var(--space-8);
}

.hero__eyebrow {
  margin-bottom: var(--space-5);
}

.hero__title {
  font-family: var(--font-en);
  font-size: var(--text-3xl);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--fg);
  max-width: 24ch;
}

.hero__title em {
  font-style: normal;
  font-weight: 400;
  position: relative;
}
.hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.1em;
  height: 1px;
  background-color: var(--fg-muted);
}

.hero__lead {
  margin-top: var(--space-6);
  max-width: 48ch;
  font-size: var(--text-sm);
  color: var(--fg-muted);
  line-height: 1.85;
}

/* =========================================================
   Tag Navigation
   ========================================================= */
.tag-nav {
  padding-block: var(--space-6);
  border-top: var(--hairline) solid var(--line);
  border-bottom: var(--hairline) solid var(--line);
}

.tag-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-7);
  flex-wrap: wrap;
}

.tag-nav__label {
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.tag-btn {
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  padding: var(--space-2) var(--space-4);
  border: var(--hairline) solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg-muted);
  transition:
    color var(--duration-fast) var(--ease-out-quart),
    background-color var(--duration-fast) var(--ease-out-quart),
    border-color var(--duration-fast) var(--ease-out-quart);
}

.tag-btn:hover {
  color: var(--fg);
  border-color: var(--fg-muted);
}

.tag-btn[aria-pressed="true"] {
  background-color: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.tag-btn__hash {
  color: var(--fg-faint);
  margin-right: 0.1em;
  transition: color var(--duration-fast);
}
.tag-btn:hover .tag-btn__hash,
.tag-btn[aria-pressed="true"] .tag-btn__hash {
  color: inherit;
}

.tag-nav__count {
  margin-left: auto;
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

/* =========================================================
   Gallery — Masonry via CSS columns
   ========================================================= */
.gallery {
  padding-block: var(--space-8) var(--space-10);
}

.gallery__grid {
  column-count: 3;
  column-gap: var(--space-7);
}

@media (max-width: 1024px) {
  .gallery__grid { column-count: 2; column-gap: var(--space-6); }
}
@media (max-width: 640px) {
  .gallery__grid { column-count: 1; }
}

/* =========================================================
   Card
   ========================================================= */
.card {
  break-inside: avoid;
  page-break-inside: avoid;
  margin-bottom: var(--space-8);
  cursor: pointer;
  display: block;
  animation: cardFadeIn 800ms var(--ease-out-quart) backwards;
}

.card:nth-child(1)  { animation-delay: 0ms; }
.card:nth-child(2)  { animation-delay: 60ms; }
.card:nth-child(3)  { animation-delay: 120ms; }
.card:nth-child(4)  { animation-delay: 180ms; }
.card:nth-child(5)  { animation-delay: 240ms; }
.card:nth-child(6)  { animation-delay: 300ms; }
.card:nth-child(7)  { animation-delay: 360ms; }
.card:nth-child(8)  { animation-delay: 420ms; }
.card:nth-child(9)  { animation-delay: 480ms; }
.card:nth-child(10) { animation-delay: 540ms; }
.card:nth-child(11) { animation-delay: 600ms; }
.card:nth-child(12) { animation-delay: 660ms; }

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--bg-soft);
  border-radius: var(--radius-sm);
  transition: transform var(--duration-slow) var(--ease-out-quart);
}

.card:hover .card__thumb {
  transform: translateY(-4px);
}

.card__thumb-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-slow) var(--ease-out-quart);
}

.card:hover .card__thumb-inner {
  transform: scale(1.03);
}

.card__body {
  padding-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.card__meta-dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background-color: var(--fg-faint);
}

.card__title {
  font-family: var(--font-en);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--fg);
  line-height: 1.3;
}

.card__title-jp {
  display: block;
  font-family: var(--font-jp);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
  margin-top: var(--space-1);
}

.card__excerpt {
  font-size: var(--text-sm);
  color: var(--fg-muted);
  line-height: 1.75;
  margin-top: var(--space-2);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.card__tag {
  font-size: var(--text-2xs);
  letter-spacing: 0.04em;
  color: var(--fg-faint);
}

/* =========================================================
   Thumbnail "fake website preview" styles
   ========================================================= */
.thumb-bg {
  position: absolute;
  inset: 0;
}

/* Light variants (WHITE category) */
.thumb--light-1 .thumb-bg { background: linear-gradient(180deg, #f4f1ea 0%, #ece8df 100%); }
.thumb--light-2 .thumb-bg { background: #efece4; }
.thumb--light-3 .thumb-bg { background: linear-gradient(135deg, #f7f4ec 0%, #e8e3d6 100%); }
.thumb--light-4 .thumb-bg { background: #f0eee7; }
.thumb--light-5 .thumb-bg { background: linear-gradient(180deg, #f9f6ee 0%, #f0ebde 100%); }
.thumb--light-6 .thumb-bg { background: #ede9df; }

/* Dark variants (BLACK category) */
.thumb--dark-1 .thumb-bg  { background: linear-gradient(180deg, #1a1a1c 0%, #0c0c0e 100%); }
.thumb--dark-2 .thumb-bg  { background: #131316; }
.thumb--dark-3 .thumb-bg  { background: linear-gradient(135deg, #1c1c1f 0%, #0a0a0c 100%); }
.thumb--dark-4 .thumb-bg  { background: #16161a; }
.thumb--dark-5 .thumb-bg  { background: linear-gradient(180deg, #1d1d1f 0%, #0e0e10 100%); }
.thumb--dark-6 .thumb-bg  { background: #181818; }

.thumb-letter {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(4rem, 12vw, 8rem);
  letter-spacing: -0.04em;
  line-height: 1;
}
.thumb--light-1 .thumb-letter,
.thumb--light-2 .thumb-letter,
.thumb--light-3 .thumb-letter,
.thumb--light-4 .thumb-letter,
.thumb--light-5 .thumb-letter,
.thumb--light-6 .thumb-letter { color: #18181a; }
.thumb--dark-1 .thumb-letter,
.thumb--dark-2 .thumb-letter,
.thumb--dark-3 .thumb-letter,
.thumb--dark-4 .thumb-letter,
.thumb--dark-5 .thumb-letter,
.thumb--dark-6 .thumb-letter { color: #ebeae5; }

.thumb-word {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(1rem, 2.4vw, 1.5rem);
  letter-spacing: 0.32em;
  text-transform: uppercase;
}
.thumb--light-1 .thumb-word, .thumb--light-2 .thumb-word, .thumb--light-3 .thumb-word,
.thumb--light-4 .thumb-word, .thumb--light-5 .thumb-word, .thumb--light-6 .thumb-word { color: #18181a; }
.thumb--dark-1 .thumb-word, .thumb--dark-2 .thumb-word, .thumb--dark-3 .thumb-word,
.thumb--dark-4 .thumb-word, .thumb--dark-5 .thumb-word, .thumb--dark-6 .thumb-word { color: #ebeae5; }

.thumb-rule {
  position: absolute;
  left: 12%;
  right: 12%;
  height: 1px;
  background-color: currentColor;
  opacity: 0.5;
}
.thumb-rule--top { top: 18%; }
.thumb-rule--bottom { bottom: 18%; }

.thumb-num {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-family: var(--font-en);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  opacity: 0.6;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: var(--hairline) solid var(--line);
  padding-block: var(--space-7);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  align-items: baseline;
  justify-content: space-between;
  font-size: var(--text-2xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
  font-family: var(--font-en);
}