/* ==========================================================
   app.css — directory page + activity popup
   References only design tokens from theme.css.
   ========================================================== */

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body { min-height: 100%; }
body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: linear-gradient(180deg, var(--color-bg-1) 0%, var(--color-bg-2) 60%, var(--color-bg-3) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-user-select: none;
  user-select: none;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(180deg,
              rgba(200,232,255,0.95) 0%,
              rgba(200,232,255,0.85) 80%,
              rgba(200,232,255,0) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  color: var(--color-ink);
  text-decoration: none;
}
.brand-logo {
  width: 40px; height: 40px;
  background: var(--color-accent);
  border: var(--border-w) solid var(--color-ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.score-pack {
  margin-left: auto;
  display: flex;
  gap: var(--space-2);
}
.score-pill {
  background: var(--color-paper);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  font-weight: 700;
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  box-shadow: 0 2px 0 var(--color-ink);
}
.score-pill .label { color: var(--color-muted); font-size: var(--fs-xs); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max-content);
  margin: var(--space-4) auto var(--space-3);
  padding: 0 var(--space-4);
  text-align: center;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 44px);
  letter-spacing: 0.5px;
  line-height: 1.1;
  margin-bottom: var(--space-2);
}
.hero p {
  color: var(--color-muted);
  font-size: var(--fs-md);
}

/* ---------- Search & filters ---------- */
.controls {
  max-width: var(--max-content);
  margin: 0 auto var(--space-5);
  padding: 0 var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.search-row {
  display: flex;
  align-items: center;
  background: var(--color-paper);
  border: var(--border-w) solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px var(--space-4);
  box-shadow: var(--shadow-stamp);
}
.search-row input {
  flex: 1;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: var(--fs-md);
  padding: 12px 8px;
  color: var(--color-ink);
  outline: none;
}
.search-row input::placeholder { color: var(--color-muted); }
.search-icon {
  font-size: 22px;
  margin-right: var(--space-1);
}
.clear-btn {
  border: 0;
  background: var(--color-bg-2);
  color: var(--color-muted);
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: none;
}
.clear-btn.show { display: block; }

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  background: var(--color-paper);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-weight: 600;
  font-size: var(--fs-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.1s, background 0.15s;
  box-shadow: 0 2px 0 var(--color-ink);
}
.chip:active { transform: translateY(2px); box-shadow: 0 0 0 var(--color-ink); }
.chip.active {
  background: var(--color-ink);
  color: var(--color-paper);
}
.chip-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.chip-label {
  font-size: var(--fs-sm);
  color: var(--color-muted);
  font-weight: 600;
  padding: 0 var(--space-2);
}

/* ---------- Results ---------- */
.results-meta {
  max-width: var(--max-content);
  margin: 0 auto var(--space-3);
  padding: 0 var(--space-4);
  font-size: var(--fs-sm);
  color: var(--color-muted);
}
.results-grid {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 var(--space-4) var(--space-6);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.card {
  background: var(--color-paper);
  border: var(--border-w-thick) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-stamp-lg);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.15s ease;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-3px); }
.card:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--color-ink); }

.card-cover {
  background: var(--card-accent, var(--color-accent));
  border-bottom: var(--border-w) solid var(--color-ink);
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
}
.card-body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: var(--fs-xs);
}
.card-meta .tag {
  background: var(--color-bg-2);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  font-weight: 600;
  color: var(--color-ink);
}
.card-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  line-height: 1.15;
}
.card-desc {
  font-size: var(--fs-sm);
  color: var(--color-muted);
  line-height: 1.4;
  flex: 1;
}
.card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--color-muted);
  padding-top: var(--space-2);
  border-top: 2px dashed var(--color-bg-2);
}
.card-foot .play {
  background: var(--color-primary);
  color: white;
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-weight: 700;
  box-shadow: 0 2px 0 var(--color-ink);
}

/* ---------- Empty state ---------- */
.empty {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  color: var(--color-muted);
}
.empty .big { font-size: 64px; margin-bottom: var(--space-3); }

/* ---------- Activity popup (full-screen overlay with iframe) ---------- */
.popup {
  position: fixed;
  inset: 0;
  background: rgba(43, 35, 86, 0.7);
  z-index: 100;
  display: none;
  align-items: stretch;
  justify-content: center;
  animation: fade-in 0.2s ease;
}
.popup.show { display: flex; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.popup-inner {
  width: 100%;
  background: var(--color-paper);
  position: relative;
  display: flex;
  flex-direction: column;
}
.popup-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-1);
  border-bottom: var(--border-w) solid var(--color-ink);
}
.popup-bar h3 {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.popup-close {
  background: var(--color-coral);
  color: white;
  border: 2px solid var(--color-ink);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 0 var(--color-ink);
}
.popup-frame {
  flex: 1;
  border: 0;
  width: 100%;
  background: white;
}

/* ---------- Save-progress nudge (after activity completion) ---------- */
.nudge {
  position: fixed;
  left: var(--space-4);
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 200;
  background: var(--color-paper);
  border: var(--border-w) solid var(--color-ink);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-stamp);
  display: none;
  align-items: center;
  gap: var(--space-3);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  animation: slide-up 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.nudge.show { display: flex; }
@keyframes slide-up {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.nudge .text { flex: 1; font-size: var(--fs-sm); }
.nudge .text strong { display: block; font-family: var(--font-display); font-size: var(--fs-md); margin-bottom: 2px; }
.nudge button {
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 0 var(--color-ink);
}
.nudge .dismiss {
  background: transparent;
  color: var(--color-muted);
  box-shadow: none;
  border: 0;
}

/* ---------- Skeleton loader ---------- */
.skeleton-card {
  background: var(--color-paper);
  border: var(--border-w-thick) solid var(--color-ink);
  border-radius: var(--radius-lg);
  height: 280px;
  opacity: 0.4;
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 0.6; }
}

/* ---------- Mobile tweaks ---------- */
@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .results-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .card-cover { height: 80px; font-size: 44px; }
  .chip-label { display: none; }
}