/*
  animals — HARUO
  design: field notes × gallery / slow watching
  font: system-ui stack
  updated: 2026
*/

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

/* ─────────────────────────────
   TOKENS
───────────────────────────── */
:root {
  --bg:        #fafafa;
  --surface:   #f2f2f2;
  --border:    #e4e4e4;
  --border-d:  #cccccc;
  --text:      #333333;
  --sub:       #777777;
  --faint:     #aaaaaa;
  --accent:    #555555;
  --white:     #ffffff;
  --font:      system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --max-w:     1100px;
  --pad:       28px;
  --gap:       56px;
  --radius:    0px;
}

/* ─────────────────────────────
   BASE
───────────────────────────── */
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; border: none; outline: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }

/* ─────────────────────────────
   LAYOUT
───────────────────────────── */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ─────────────────────────────
   HEADER
───────────────────────────── */
.site-header {
  padding: 28px 0 0;
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.site-logo {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text);
}
.site-logo a { color: inherit; }
.site-nav {
  display: flex;
  gap: 28px;
}
.site-nav a {
  font-size: 0.8125rem;
  color: var(--faint);
  letter-spacing: 0.06em;
  transition: color 0.18s;
}
.site-nav a:hover,
.site-nav a.active { color: var(--text); }

/* ─────────────────────────────
   FOOTER
───────────────────────────── */
.site-footer {
  margin-top: var(--gap);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.footer-links {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 16px;
}
.footer-group__name {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
  margin-bottom: 12px;
}
.footer-group ul { list-style: none; }
.footer-group li { line-height: 1.5; }
.footer-group li + li { margin-top: 8px; }
.footer-group a {
  font-size: 0.8125rem;
  color: var(--faint);
  transition: color 0.18s;
}
.footer-group a:hover { color: var(--text); }
.footer-group a.external::after {
  content: "↗";
  font-size: 0.7em;
  margin-left: 3px;
  color: var(--sub);
  opacity: 0.7;
  transition: opacity 0.18s, color 0.18s;
}
.footer-group a.external:hover::after {
  opacity: 1;
  color: var(--text);
}
.footer-copy {
  font-size: 0.75rem;
  color: var(--faint);
  letter-spacing: 0.06em;
  padding-top: 4px;
}

/* ─────────────────────────────
   FOOTER CARDS
───────────────────────────── */
.footer-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.footer-card {
  background: #f7f7f7;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 18px 20px;
}

.footer-card__name {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sub);
  margin-bottom: 5px;
}

.footer-card__desc {
  font-size: 0.6875rem;
  color: var(--faint);
  letter-spacing: 0.04em;
  line-height: 1.5;
  margin-bottom: 12px;
}

.footer-card ul {
  list-style: none;
}

.footer-card li {
  line-height: 1.5;
}

.footer-card li + li {
  margin-top: 5px;
}

.footer-card a {
  font-size: 0.8125rem;
  color: var(--faint);
  transition: color 0.18s;
}

.footer-card a:hover {
  color: var(--text);
}

.footer-card a.external::after {
  content: "↗";
  font-size: 0.7em;
  margin-left: 3px;
  color: var(--sub);
  opacity: 0.7;
  transition: opacity 0.18s, color 0.18s;
}

.footer-card a.external:hover::after {
  opacity: 1;
  color: var(--text);
}

/* ─────────────────────────────
   TAG PILL
───────────────────────────── */
.tag {
  display: inline-block;
  padding: 0.25em 0.75em;
  border: 1px solid var(--border-d);
  border-radius: 2px;
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--sub);
  background: transparent;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  font-family: var(--font);
  font-weight: 400;
}
button.tag { cursor: pointer; }
a.tag      { text-decoration: none; cursor: pointer; }
.tag:hover {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}
.tag.active {
  border-color: var(--text);
  background: rgba(0, 0, 0, 0.03);
  color: var(--text);
}

/* ── 複数タグ選択中インジケーター ──
   activeTags が1件以上あるとき filter-bar に下線を表示 */
.filter-bar.has-filter {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
/* all（クリア）ボタン: 何も選んでいないときだけ active 相当の見た目 */
.tag--clear {
  color: var(--faint);
  border-color: var(--border);
}
.tag--clear.active,
.tag--clear:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-d);
}
/* カード内タグ: クリック可能だが主張を抑える */
.tag--card {
  cursor: pointer;
}
.tag--card.active {
  border-color: var(--text);
  background: rgba(0, 0, 0, 0.03);
  color: var(--text);
}

/* ─────────────────────────────
   FILTER BAR
───────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 32px;
}
.filter-bar__label {
  font-size: 0.6875rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  margin-right: 4px;
}

/* ─────────────────────────────
   WORKS GRID  3col → 2col → 1col
───────────────────────────── */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;                       /* タイル状 */
}

/* CARD */
.work-card {
  display: block;
  background: var(--bg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}
.work-card__thumb {
  aspect-ratio: 1 / 1;
  background: transparent;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.work-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0;
  background: transparent;
  transition: transform 0.45s ease, opacity 0.3s;
}
.work-card:hover .work-card__thumb img {
  transform: scale(1.04);
}
.work-card__no-img {
  font-size: 0.75rem;
  color: var(--faint);
  letter-spacing: 0.1em;
}
.work-card__body {
  padding: 10px 12px 14px;
  border-top: 1px solid var(--border);
}
.work-card__title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: 0.01em;
}
.work-card__meta {
  font-size: 0.6875rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.work-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* card hover: subtle lift */
.work-card {
  transition: box-shadow 0.25s;
  outline: none;
}
.work-card:focus { outline: none; }
.work-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.10);
  z-index: 1;
}

/* ─────────────────────────────
   COUNT / EMPTY
───────────────────────────── */
.count-label {
  font-size: 0.6875rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.empty-state {
  font-size: 0.875rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  padding: 56px 0;
  text-align: center;
  grid-column: 1 / -1;
}

/* ─────────────────────────────
   WORK DETAIL  left: image / right: info
───────────────────────────── */
.work-detail {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 56px;
  align-items: start;
  margin-top: 36px;
}

/* gallery */
.gallery__main {
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  cursor: zoom-in;
  position: relative;
}
.gallery__main img {
  width: 100%;
  max-height: 76vh;
  object-fit: contain;
  padding: 28px;
  display: block;
}
.gallery__hint {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 0.625rem;
  color: var(--faint);
  letter-spacing: 0.1em;
  pointer-events: none;
}
.gallery__thumbs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.gallery__thumbs img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.gallery__thumbs img.active,
.gallery__thumbs img:hover {
  opacity: 1;
}

/* info panel */
.work-info__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.04em;
  margin-bottom: 32px;
  padding: 8px 14px;
  border: 1px solid var(--border-d);
  transition: background 0.18s, border-color 0.18s;
}
.work-info__back:hover {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}
.work-info__series {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.work-info__title {
  font-size: clamp(1.75rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 24px;
}
.work-meta {
  border-top: 1px solid var(--border);
  margin-bottom: 20px;
}
.work-meta__row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}
.work-meta__key { color: var(--faint); }
.work-meta__val { color: var(--text); }
.work-info__desc {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--sub);
  margin-bottom: 20px;
}
.work-info__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 28px;
}
.work-links {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.work-links__item {
  font-size: 0.8125rem;
  color: var(--sub);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 0.18s;
}
.work-links__item:hover { color: var(--text); }
.work-links__item::before { content: '↗'; font-size: 0.65rem; }

/* work nav */
.work-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--faint);
  letter-spacing: 0.04em;
}
.work-nav a {
  color: var(--sub);
  transition: color 0.18s;
}
.work-nav a:hover { color: var(--text); }
.work-nav span { opacity: 0.35; }

/* ─────────────────────────────
   MODAL (lightbox)
───────────────────────────── */
.modal {
  position: fixed; inset: 0;
  background: rgba(250,250,250,0.97);
  display: flex; align-items: center; justify-content: center;
  z-index: 900;
  opacity: 0; pointer-events: none;
  transition: opacity 0.22s;
}
.modal.open { opacity: 1; pointer-events: auto; }
.modal__img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}
.modal__close {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--faint);
  transition: color 0.18s;
  font-family: var(--font);
}
.modal__close:hover { color: var(--text); }

/* ─────────────────────────────
   FADE IN
───────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────
   BACK LINK (works list page)
───────────────────────────── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.04em;
  margin-bottom: 36px;
  padding: 8px 14px;
  border: 1px solid var(--border-d);
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}
.back-link:hover {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}

/* ─────────────────────────────
   CONCEPT NAV (cross-site strip)
───────────────────────────── */
.concept-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0 0;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  flex-wrap: wrap;
  color: var(--faint);
}
.concept-nav__sep { color: var(--border-d); }
.concept-nav__links { display: flex; gap: 12px; flex-wrap: wrap; }
.concept-nav__link {
  color: var(--faint);
  transition: color 0.18s;
}
.concept-nav__link:hover { color: var(--text); }
.concept-nav__link.current { color: var(--sub); }

/* ─────────────────────────────
   OBSERVATION MODES UI
───────────────────────────── */
.obs-modes { margin-bottom: 32px; }
.obs-modes__heading {
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 16px;
}
.obs-modes__row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.obs-modes__label {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  min-width: 68px;
  padding-top: 5px;
  flex-shrink: 0;
}
.obs-modes__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.obs-modes__tags-wrapper { flex: 1; min-width: 0; }

/* ── Mobile: horizontal scroll per row ── */
@media (max-width: 768px) {
  .obs-modes__row {
    flex-wrap: nowrap;
    align-items: center;
    gap: 12px;
  }
  .obs-modes__label {
    min-width: 90px;
    padding-top: 0;
  }
  .obs-modes__tags-wrapper {
    position: relative;
  }
  .obs-modes__tags-wrapper::after {
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: 28px;
    pointer-events: none;
    background: linear-gradient(to right, rgba(250,250,250,0), rgba(250,250,250,1));
    z-index: 1;
  }
  .obs-modes__tags {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-left: 4px;
    padding-right: 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .obs-modes__tags::-webkit-scrollbar {
    display: none;
  }
}

.obs-modes__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.obs-modes__count {
  font-size: 0.75rem;
  color: var(--faint);
  letter-spacing: 0.04em;
}
.obs-modes__actions { display: flex; gap: 10px; align-items: center; }
.btn-clear {
  font-size: 0.75rem;
  color: var(--faint);
  background: none;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0.4em 0.9em;
  letter-spacing: 0.04em;
  transition: color 0.18s, border-color 0.18s;
  font-family: var(--font);
}
.btn-clear:hover { color: var(--text); border-color: var(--text); }

/* footer description sub-text */
.footer-field-desc {
  font-size: 0.6875rem;
  color: var(--faint);
  letter-spacing: 0.04em;
}

/* ─────────────────────────────
   RANDOM BUTTON
───────────────────────────── */
.btn-random {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.55em 1.25em;
  border: 1px solid var(--border-d);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--sub);
  background: var(--white);
  transition: transform 0.12s ease, opacity 0.12s ease, background 0.18s, color 0.18s, border-color 0.18s;
  cursor: pointer;
  font-family: var(--font);
}
.btn-random:hover {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}
.btn-random:active {
  opacity: 0.6;
  transform: scale(0.98);
}

/* ─────────────────────────────
   RESPONSIVE
───────────────────────────── */
/* Tablet: 2 cols */
@media (max-width: 860px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .work-detail {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .work-detail__gallery { order: 0; }
  .work-detail__info    { order: 1; }
}

/* Mobile: 1 col */
@media (max-width: 540px) {
  :root { --pad: 16px; --gap: 40px; }
  .works-grid {
    grid-template-columns: 1fr;
    gap: 1px;
  }
  .work-info__title { font-size: 1.5rem; }
  .footer-inner { flex-direction: column; gap: 24px; }
  .footer-links { gap: 28px; }
  .footer-cards { grid-template-columns: 1fr; }
  .site-header__bar { flex-wrap: wrap; gap: 8px; }
}