/* AvianVisitors - collage frontend styles.
 * Paper-and-ink aesthetic to match the bundled kachō-e illustrations. */

:root {
  --paper:      #f4ede0;
  --paper-2:    #ebe1cf;
  --ink:        #3a2f24;
  --ink-2:      #6b5c4a;
  --ink-soft:   #9d8d76;
  --accent:     #a8341d;
  --recess:     inset 0 1px 2px rgba(58,47,36,0.18), inset 0 -1px 0 rgba(255,255,255,0.4);
  --raised:     0 1px 0 rgba(58,47,36,0.12), 0 0 0 1px rgba(58,47,36,0.06);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 14px/1.5 ui-serif, "Iowan Old Style", Georgia, serif;
  overflow-x: hidden;
}
button { font: inherit; color: inherit; }

/* ---- Stage + static head ---- */
.stage {
  min-height: 100vh;
  display: flex; flex-direction: column;
  padding: 40px 16px 120px;
}
.static-head {
  text-align: center;
  padding: 8px 0 14px;
}
.static-head .pre {
  background: none; border: 0; padding: 0; cursor: pointer;
  font: italic 400 13px/1 ui-serif, "Iowan Old Style", Georgia, serif;
  color: var(--ink-2); letter-spacing: 0.06em;
}
.static-head .pre:hover { color: var(--ink); }
.static-head h1 {
  margin: 4px 0 0;
  font: 700 28px/1.1 ui-serif, "Iowan Old Style", Georgia, serif;
  letter-spacing: 0.01em;
}
@media (min-width: 768px) { .static-head h1 { font-size: 36px; } }

/* ---- View container ---- */
.views { flex: 1; position: relative; }
.view { width: 100%; }

/* ---- Collage tiles ---- */
.collage {
  position: relative;
  width: 100%;
  height: calc(100vh - 240px);
  min-height: 360px;
}
.gtile {
  position: absolute;
  background: none; border: 0; padding: 0; cursor: pointer;
  transition: transform 180ms ease, z-index 0s;
}
.gtile:hover, .gtile.is-hover { transform: scale(1.04); z-index: 3; }
.gtile img {
  width: 100%; height: 100%; object-fit: contain; display: block;
  pointer-events: none;
}
.collage .empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft);
  font: italic 14px ui-serif, Georgia, serif;
}

/* ---- Stats timeline ---- */
.stats-tl {
  position: relative;
  width: 100%; height: 60vh; min-height: 340px;
  padding: 28px 22px 30px;
}
.stats-tl-plot { position: relative; width: 100%; height: 100%; }
.stats-tl-mark {
  position: absolute; width: 10px; height: 10px;
  border-radius: 999px;
  background: var(--ink);
  transform: translate(-50%, 50%);
  cursor: pointer;
}
.stats-tl-empty {
  display: flex; align-items: center; justify-content: center;
  height: 100%; color: var(--ink-soft); font-style: italic;
}

/* ---- Atlas grid ---- */
.atlas-sort {
  display: flex; position: relative;
  margin: 0 auto 18px; padding: 4px;
  background: var(--paper-2); border-radius: 999px;
  box-shadow: var(--recess);
  width: fit-content;
}
.atlas-sort button {
  position: relative; z-index: 1;
  background: none; border: 0; padding: 6px 14px; cursor: pointer;
  font: 10px ui-monospace, Menlo, monospace;
  letter-spacing: 0.06em; text-transform: lowercase;
  color: var(--ink-soft);
  transition: color 160ms;
}
.atlas-sort button[aria-current="true"] { color: var(--ink); }
.atlas-list {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  padding: 0 8px;
}
.atlas-card {
  background: none; border: 0; padding: 6px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  border-radius: 10px;
  transition: background 160ms;
}
.atlas-card:hover { background: rgba(58,47,36,0.04); }
.atlas-card img { width: 100%; max-height: 110px; object-fit: contain; }
.atlas-name {
  margin-top: 4px;
  font: 11px ui-serif, Georgia, serif;
  color: var(--ink);
}
.atlas-count {
  font: 9px ui-monospace, Menlo, monospace;
  color: var(--ink-soft);
}

/* ---- Bottom-fixed view slider + window picker ---- */
.slider, .window-pick {
  position: fixed;
  display: flex; padding: 4px;
  background: var(--paper-2); border-radius: 999px;
  box-shadow: var(--recess);
  z-index: 20;
}
.slider {
  bottom: 28px; left: 50%; transform: translateX(-50%);
}
.window-pick {
  top: 18px; left: 18px;
}
.slider button, .window-pick button {
  position: relative; z-index: 1;
  background: none; border: 0; padding: 7px 14px; cursor: pointer;
  font: 10px ui-monospace, Menlo, monospace;
  letter-spacing: 0.08em; text-transform: lowercase;
  color: var(--ink-soft);
  transition: color 160ms;
}
.slider button[aria-current="true"], .window-pick button[aria-current="true"] {
  color: var(--ink);
}
.seg-pill {
  position: absolute; top: 4px; bottom: 4px;
  background: var(--paper); border-radius: 999px;
  box-shadow: var(--raised);
  transition: transform 220ms cubic-bezier(.32,.72,.32,1), width 220ms;
  z-index: 0;
}

/* ---- About modal ---- */
#about-modal, #detail-modal {
  position: fixed; inset: 0; z-index: 60;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  pointer-events: none; opacity: 0;
  transition: opacity 200ms ease;
}
#about-modal[aria-hidden="false"], #detail-modal[aria-hidden="false"] {
  pointer-events: auto; opacity: 1;
}
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(26,22,18,0.32);
}
.modal-close {
  position: absolute; top: 14px; right: 14px;
  background: none; border: 0; cursor: pointer;
  font: 22px/1 ui-serif, Georgia, serif;
  color: var(--ink-soft);
}
.modal-close:hover { color: var(--ink); }
.about-card, .detail-card {
  position: relative;
  max-width: 432px; width: 100%;
  background: var(--paper);
  border-radius: 14px;
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.6),
    0 30px 80px rgba(26,22,18,0.24);
  padding: 34px 34px 28px;
}
.about-card .about-eyebrow {
  margin: 0 0 7px;
  font: italic 400 13px/1 ui-serif, Georgia, serif;
  color: var(--ink-2); letter-spacing: 0.06em;
}
.about-card h2 {
  margin: 0 0 13px;
  font: 700 22px/1.25 ui-serif, Georgia, serif;
  color: var(--ink);
}
.about-card .about-body {
  margin: 0;
  font: 400 14.5px/1.62 ui-serif, Georgia, serif;
  color: var(--ink-2);
}
.about-card .about-body a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.about-card .about-explore {
  margin-top: 20px;
  background: none; border: 0; padding: 0;
  font: 700 11px/1 ui-monospace, Menlo, monospace;
  letter-spacing: 0.08em; text-transform: lowercase;
  color: var(--ink-soft); cursor: pointer;
}
.about-card .about-explore:hover { color: var(--ink); }
.built-by {
  margin: 18px 4px 0;
  font: 10px ui-monospace, Menlo, monospace;
  color: var(--ink-soft); letter-spacing: 0.04em;
}
.built-by a {
  color: inherit; text-decoration: underline; text-underline-offset: 2px;
}
.built-by a:hover { color: var(--ink); }

/* ---- Detail modal ---- */
.detail-card {
  max-width: 520px;
  padding: 26px 30px;
}
.detail-img {
  width: 100%; max-height: 220px; object-fit: contain;
  background: rgba(0,0,0,0.02); border-radius: 8px;
}
.detail-title {
  margin: 14px 0 4px;
  font: 700 22px/1.25 ui-serif, Georgia, serif;
}
.detail-sci {
  margin: 0 0 6px;
  font: 13px ui-serif, Georgia, serif;
  color: var(--ink-2);
}
.detail-stats {
  margin: 0 0 14px;
  font: 11px ui-monospace, Menlo, monospace;
  color: var(--ink-soft);
}
.detail-audio { width: 100%; margin-bottom: 10px; }
.detail-spec  { width: 100%; border-radius: 6px; background: #111; }