/* ===========================================================
   Curiosity Corner — gallery (home) page
   =========================================================== */

/* ---------------- Site header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 2px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem 0;
}
.logo {
  display: flex; align-items: center; gap: .6rem;
  text-decoration: none; font-weight: 900; font-size: 1.25rem;
  letter-spacing: -.02em;
}
.logo .mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  font-size: 1.4rem; border-radius: 14px;
  background: linear-gradient(150deg, var(--math), var(--history) 45%, var(--reading) 78%, var(--science));
  box-shadow: var(--shadow-sm);
}
.header-spacer { flex: 1; }
.header-actions { display: flex; align-items: center; gap: .5rem; }

.icon-btn {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 999px; border: 2px solid var(--line-strong);
  background: var(--surface); cursor: pointer; font-size: 1.1rem;
  transition: transform .12s ease;
}
.icon-btn:hover { transform: translateY(-2px); }

/* ---------------- Hero ---------------- */
.hero { padding: 2.4rem 0 1.4rem; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5.2vw, 3.3rem); margin-bottom: .3rem; }
.hero h1 .rainbow {
  background: linear-gradient(92deg, var(--math), var(--history) 34%, var(--reading) 66%, var(--science));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lede { color: var(--ink-soft); font-size: 1.1rem; max-width: 46rem; margin: 0 auto 1.4rem; }

.subject-tiles {
  display: grid; gap: .9rem; margin: 0 auto 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  max-width: 900px;
}
.subject-tile {
  border: 3px solid transparent; cursor: pointer; text-align: left;
  background: var(--accent-soft); color: var(--ink);
  border-radius: var(--r-lg); padding: .95rem 1rem;
  display: flex; align-items: center; gap: .7rem;
  transition: transform .14s ease, box-shadow .14s ease;
  box-shadow: var(--shadow-sm);
}
.subject-tile:hover { transform: translateY(-3px) rotate(-.6deg); box-shadow: var(--shadow-md); }
.subject-tile[aria-pressed="true"] { border-color: var(--accent); box-shadow: var(--shadow-md); }
.subject-tile .t-emoji { font-size: 1.9rem; line-height: 1; }
.subject-tile .t-name { font-weight: 900; font-size: 1.05rem; }
.subject-tile .t-count { font-size: .82rem; color: var(--ink-soft); font-weight: 700; }

/* ---------------- Toolbar ---------------- */
.toolbar {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.4rem;
}
.search-row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }
.search-box {
  flex: 1 1 260px; display: flex; align-items: center; gap: .55rem;
  background: var(--surface-2); border: 2px solid var(--line-strong);
  border-radius: 999px; padding: .45rem .9rem;
}
.search-box input {
  flex: 1; border: 0; background: transparent; outline: none;
  font-size: 1rem; font-weight: 600; min-width: 0;
}
.search-box .clear-search {
  border: 0; background: transparent; cursor: pointer; font-size: 1rem;
  color: var(--ink-faint); padding: 0 .2rem;
}

.filter-groups {
  display: grid; gap: .75rem; margin-top: .9rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}
.filter-group > .fg-label {
  display: block; font-size: .78rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--ink-faint); font-weight: 800; margin-bottom: .35rem;
}
.chip[data-subject-chip="Math"]    { --chip-on: var(--math); }
.chip[data-subject-chip="Science"] { --chip-on: var(--science); }
.chip[data-subject-chip="Reading"] { --chip-on: var(--reading); }
.chip[data-subject-chip="History"] { --chip-on: var(--history); }

.select {
  border: 2px solid var(--line-strong); background: var(--surface-2);
  border-radius: 999px; padding: .38rem .7rem; font-weight: 700; cursor: pointer;
}

/* ---------------- Results ---------------- */
.results-bar {
  display: flex; align-items: baseline; gap: .8rem; flex-wrap: wrap;
  margin-bottom: 1rem;
}
.results-bar .count { font-weight: 800; }
.results-bar .count em { font-style: normal; color: var(--ink-faint); font-weight: 700; }

.group { margin-bottom: 2.2rem; }
.group-head {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  margin-bottom: .85rem; padding-bottom: .5rem;
  border-bottom: 3px dashed var(--line-strong);
}
.group-head h2 { font-size: 1.4rem; margin: 0; display: flex; align-items: center; gap: .5rem; }
.group-head .g-note { color: var(--ink-faint); font-weight: 700; font-size: .88rem; }
.group-head .g-count {
  margin-left: auto; background: var(--accent-soft); color: var(--ink);
  border-radius: 999px; padding: .15rem .7rem; font-weight: 800; font-size: .85rem;
}

.card-grid {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(auto-fill, minmax(275px, 1fr));
}

.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 2px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.card:focus-within { border-color: var(--accent); }

.card-top {
  background: var(--accent-soft);
  padding: 1.1rem 1.1rem .9rem;
  display: flex; align-items: flex-start; gap: .75rem;
}
.card-emoji {
  font-size: 2.1rem; line-height: 1;
  background: var(--surface); border-radius: 16px;
  width: 58px; height: 58px; display: grid; place-items: center;
  box-shadow: var(--shadow-sm); flex: none;
}
.card-heads { flex: 1; min-width: 0; }
.card-title { margin: 0 0 .15rem; font-size: 1.15rem; padding-right: 1.9rem; }
.card-title a { text-decoration: none; }
.card-title a::after { content: ''; position: absolute; inset: 0; }
.card-kind { font-size: .82rem; font-weight: 800; color: var(--ink-soft); }

.fav {
  position: absolute; top: .55rem; right: .55rem; z-index: 2;
  border: 0; background: color-mix(in srgb, var(--surface) 70%, transparent);
  width: 34px; height: 34px; border-radius: 999px; cursor: pointer;
  font-size: 1rem; display: grid; place-items: center; filter: grayscale(1) opacity(.55);
  transition: transform .12s ease, filter .12s ease;
}
.fav:hover { transform: scale(1.15); }
.fav[aria-pressed="true"] { filter: none; }

.card-body { padding: .85rem 1.1rem 1rem; display: flex; flex-direction: column; gap: .7rem; flex: 1; }
.card-blurb { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.card-meta { display: flex; flex-wrap: wrap; gap: .35rem; }
.card-topics { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: auto; }
.topic-tag {
  font-size: .76rem; font-weight: 800; color: var(--ink-soft);
  background: var(--surface-2); border: 1px dashed var(--line-strong);
  border-radius: 8px; padding: .1rem .45rem;
}
.dots { letter-spacing: 1px; }
.card-actions { display: flex; gap: .5rem; align-items: center; }
.card-actions .btn { position: relative; z-index: 2; }

.pill.played { background: color-mix(in srgb, var(--ok) 16%, var(--surface)); border-color: transparent; color: var(--ok); }

/* ---------------- Empty state ---------------- */
.empty {
  text-align: center; padding: 3rem 1rem; background: var(--surface);
  border: 3px dashed var(--line-strong); border-radius: var(--r-lg);
}
.empty .big { font-size: 3rem; }

/* ---------------- Detail dialog ---------------- */
dialog.detail {
  border: 0; padding: 0; border-radius: var(--r-lg);
  width: min(560px, calc(100% - 2rem));
  background: var(--surface); color: var(--ink);
  box-shadow: var(--shadow-lg);
}
dialog.detail::backdrop { background: rgba(30, 24, 45, .55); backdrop-filter: blur(3px); }
.detail-head { background: var(--accent-soft); padding: 1.3rem 1.4rem; display: flex; gap: .9rem; align-items: center; }
.detail-head .card-emoji { width: 66px; height: 66px; font-size: 2.4rem; }
.detail-body { padding: 1.2rem 1.4rem 1.4rem; }
.detail-body h4 { margin: 1.1rem 0 .4rem; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-faint); }
.detail-body ul { margin: 0; padding-left: 1.15rem; color: var(--ink-soft); }
.detail-foot { display: flex; gap: .6rem; justify-content: flex-end; padding: 0 1.4rem 1.4rem; }

/* ---------------- Grown-ups panel + footer ---------------- */
.grownups {
  background: var(--surface); border: 2px solid var(--line);
  border-radius: var(--r-lg); padding: 1.6rem; margin: 1rem 0 3rem;
}
.grownups h2 { font-size: 1.5rem; }
.grownups .cols { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grownups h3 { font-size: 1rem; margin-bottom: .3rem; }
.grownups p, .grownups li { color: var(--ink-soft); font-size: .95rem; }

.site-footer { text-align: center; color: var(--ink-faint); padding: 1rem 0 2.5rem; font-size: .9rem; }