/* ------------------------------------------------------------------
   The Bird Family Archive — editorial archival aesthetic
   Palette: aged paper, sepia ink, oxblood accent
   Type: EB Garamond (display) · Crimson Pro (body) · DM Mono (UI)
   ------------------------------------------------------------------ */

:root {
  --paper:       #f4ecd8;
  --paper-deep:  #ead9b5;
  --paper-edge:  #d9c69b;
  --ink:         #2b1f12;
  --ink-soft:    #5a4530;
  --ink-faint:   #8a6f4f;
  --tan:         #a8895d;
  --oxblood:     #7a2218;
  --rule:        rgba(43, 31, 18, 0.18);

  --serif-display: 'EB Garamond', 'Cormorant Garamond', Georgia, serif;
  --serif-body:    'Crimson Pro', 'EB Garamond', Georgia, serif;
  --mono:          'DM Mono', ui-monospace, 'Courier New', monospace;

  --col-max: 1200px;
  --tilt-grid: 1.6deg;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--serif-body);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at 30% 10%, rgba(255,238,200,0.5), transparent 60%),
    radial-gradient(ellipse at 90% 90%, rgba(140,90,40,0.10), transparent 55%),
    repeating-radial-gradient(circle at 50% 50%, rgba(120,85,40,0.025) 0 1px, transparent 1px 3px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.2  0 0 0 0 0.15  0 0 0 0 0.08  0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.10'/></svg>");
  mix-blend-mode: multiply;
  opacity: 0.55;
}

main, header, nav, footer { position: relative; z-index: 1; }

/* ---------- MASTHEAD ---------- */
.masthead {
  padding: 5rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--rule);
}

.masthead__inner {
  max-width: 760px;
  margin: 0 auto;
}

.masthead__eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 1.5rem;
}

.masthead__title {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  line-height: 1.02;
  color: var(--ink);
}

.masthead__title::after {
  content: '';
  display: block;
  width: 80px; height: 1px;
  background: var(--ink);
  margin: 1.4rem auto 0;
  opacity: 0.6;
}

.masthead__lede {
  font-family: var(--serif-body);
  font-size: 1.18rem;
  font-style: italic;
  font-weight: 300;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 auto 1.8rem;
}

.masthead__meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 2rem;
}

.masthead__actions {
  display: flex; gap: 0.75rem; justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, transform 150ms ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn--primary:hover { background: var(--oxblood); border-color: var(--oxblood); }

.btn--ghost {
  border-color: transparent;
  color: var(--ink-soft);
}
.btn--ghost:hover { background: var(--paper-deep); color: var(--ink); }

/* ---------- TIMELINE ---------- */
.timeline {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  background-image: linear-gradient(to bottom, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(2px);
}

.timeline__inner {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--tan) transparent;
  align-items: center;
  justify-content: center;
}
.timeline__inner::-webkit-scrollbar { height: 4px; }
.timeline__inner::-webkit-scrollbar-thumb { background: var(--tan); }

.timeline a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}
.timeline a:hover { color: var(--ink); }
.timeline a.is-active {
  color: var(--oxblood);
  border-bottom-color: var(--oxblood);
}
.timeline__count {
  font-size: 0.62rem;
  opacity: 0.6;
  margin-left: 0.35em;
}

/* ---------- ARCHIVE ---------- */
.archive {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.archive__loading {
  text-align: center;
  font-style: italic;
  color: var(--ink-faint);
  padding: 4rem 0;
}

.decade {
  margin-top: 4rem;
  scroll-margin-top: 4rem;
}
.decade:first-of-type { margin-top: 0; }

.decade__heading {
  font-family: var(--serif-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0 0 0.5rem;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}
.decade__heading-num {
  font-variant-numeric: oldstyle-nums;
}
.decade__heading-suffix {
  font-size: 0.45em;
  font-style: italic;
  color: var(--ink-faint);
  letter-spacing: 0;
}
.decade__count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  text-transform: uppercase;
  font-style: normal;
}

.section {
  margin-top: 2.75rem;
  scroll-margin-top: 4rem;
}

.section__heading {
  font-family: var(--serif-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.75rem;
  margin: 0 0 0.25rem;
  color: var(--ink-soft);
}
.section__year {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--tan);
  display: block;
  margin-bottom: 0.4rem;
}
.section__meta {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin: 0 0 1.5rem;
}

/* Photo grid — scrapbook tilt */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 2.4rem 1.8rem;
  align-items: end;
}

.card {
  display: flex;
  flex-direction: column;
  cursor: zoom-in;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.card:hover {
  transform: translateY(-4px) rotate(0deg) !important;
  z-index: 2;
}

.card__photo {
  background: #fff;
  padding: 12px 12px 14px;
  box-shadow:
    0 1px 2px rgba(0,0,0,0.08),
    0 8px 18px rgba(60,40,15,0.18),
    0 18px 36px rgba(60,40,15,0.10);
  position: relative;
}
.card__photo::after {
  content: '';
  position: absolute;
  inset: 12px 12px 14px;
  box-shadow: inset 0 0 18px rgba(0,0,0,0.08);
  pointer-events: none;
}
.card__photo img {
  display: block;
  width: 100%;
  height: auto;
  filter: sepia(0.10) saturate(0.92) contrast(1.02);
}

.card__caption {
  font-family: var(--serif-body);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-top: 0.85rem;
  padding: 0 0.25rem;
  line-height: 1.35;
}
.card__caption--empty {
  color: var(--ink-faint);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

/* ---------- LIGHTBOX ---------- */
.lightbox {
  border: none;
  background: rgba(20, 14, 8, 0.92);
  color: var(--paper);
  padding: 0;
  margin: 0;
  width: 100vw; height: 100vh;
  max-width: 100vw; max-height: 100vh;
  overflow: hidden;
}
.lightbox::backdrop {
  background: rgba(20, 14, 8, 0.6);
  backdrop-filter: blur(8px);
}

.lightbox__figure {
  margin: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 5rem 6rem;
  gap: 1.2rem;
  transition: opacity 220ms ease;
}
.lightbox__figure.is-fading { opacity: 0; }

.lightbox__img {
  max-width: 100%;
  max-height: calc(100vh - 12rem);
  object-fit: contain;
  background: #fff;
  padding: 14px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
  filter: sepia(0.08);
}

.lightbox__caption {
  text-align: center;
  font-family: var(--serif-body);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--paper);
  max-width: 60ch;
}
.lightbox__caption-meta {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(244, 236, 216, 0.6);
  font-style: normal;
}

.lightbox__close,
.lightbox__nav,
.lightbox__chrome-btn {
  position: absolute;
  background: transparent;
  border: 1px solid rgba(244, 236, 216, 0.3);
  color: var(--paper);
  cursor: pointer;
  font-family: var(--serif-display);
  transition: background 180ms, border-color 180ms, color 180ms;
}
.lightbox__close:hover,
.lightbox__nav:hover,
.lightbox__chrome-btn:hover {
  background: rgba(244, 236, 216, 0.12);
  border-color: var(--paper);
}

.lightbox__close {
  top: 1.5rem; right: 1.5rem;
  width: 44px; height: 44px;
  font-size: 1.2rem;
}
.lightbox__nav {
  top: 50%; transform: translateY(-50%);
  width: 56px; height: 56px;
  font-size: 2.2rem;
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
  padding-bottom: 4px;
}
.lightbox__nav--prev { left: 1.5rem; }
.lightbox__nav--next { right: 1.5rem; }

.lightbox__chrome {
  position: absolute;
  bottom: 1.5rem; left: 50%;
  transform: translateX(-50%);
}
.lightbox__chrome-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.65rem 1.25rem;
}

.lightbox.is-slideshow .lightbox__nav,
.lightbox.is-slideshow .lightbox__chrome-btn { opacity: 0.3; }
.lightbox.is-slideshow .lightbox__close { border-color: var(--oxblood); color: var(--paper); }

/* ---------- COLOPHON ---------- */
.colophon {
  max-width: 700px;
  margin: 4rem auto 5rem;
  padding: 3rem 1.5rem 0;
  border-top: 1px solid var(--rule);
  text-align: center;
  font-family: var(--serif-body);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink-soft);
}
.colophon__meta {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 1.5rem;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 640px) {
  .masthead { padding: 3rem 1rem 2rem; }
  .archive { padding: 2rem 1rem 3rem; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1.8rem 1rem; }
  .decade__heading { font-size: 2.2rem; }
  .lightbox__figure { padding: 3rem 1rem 5rem; }
  .lightbox__nav { width: 44px; height: 44px; font-size: 1.6rem; }
}