/* ============================================================
   CULTURILY — DAILY CHALLENGE
   Extends lesson.css for the daily challenge page.
   Adds: loading splash, completed screen, countdown,
   quiz shell overrides (no hearts), end screen, mini leaderboard.
   ============================================================ */

/* ── Loading splash ─────────────────────────────────────── */

.dc-loading {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-6);
  background: var(--bg);
  z-index: 100;
}

/* ── Completed screen ───────────────────────────────────── */

.dc-completed {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-6) var(--sp-5) calc(var(--sp-6) + 60px);
  background: var(--bg);
  overflow-y: auto;
}

.dc-completed-inner {
  width: 100%;
  max-width: var(--app-width, 480px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  text-align: center;
}

.dc-completed-icon {
  font-size: 56px;
  line-height: 1;
  user-select: none;
  margin-bottom: var(--sp-2);
}

.dc-completed-heading {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 900;
  color: var(--text-primary);
  margin: 0;
}

.dc-completed-sub {
  font-size: var(--text-base);
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.dc-completed-xp-row {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  margin: var(--sp-1) 0;
}

.dc-completed-xp-value {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--accent);
}

.dc-completed-xp-label {
  font-size: var(--text-sm);
  color: var(--text-subtle);
  font-weight: 500;
}

.dc-completed-next-label {
  font-size: var(--text-sm);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin: 0;
}

/* ── Countdown timer ────────────────────────────────────── */

.dc-countdown {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 10vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  line-height: 1;
  padding: var(--sp-3) var(--sp-5);
  background: var(--surface-2);
  border-radius: var(--r-lg);
  min-width: 12ch;
  text-align: center;
  border: 1px solid var(--border);
}

.dc-completed-reset-note {
  font-size: var(--text-xs);
  color: var(--text-subtle);
  margin: 0;
}

/* Bottom nav for completed screen (fixed) */
.dc-completed-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-width, 480px);
}

/* ── Quiz shell ─────────────────────────────────────────── */

.dc-shell {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

/* Top bar: back · center (badge + progress bar) · counter */
.dc-top-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.dc-top-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  min-width: 0;
}

.dc-badge-row {
  display: flex;
  justify-content: center;
}

.dc-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent-text, #0e0e0e);
  background: var(--accent);
  padding: 2px var(--sp-2);
  border-radius: var(--r-full, 9999px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  user-select: none;
}

.dc-q-counter {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.dc-q-sep {
  color: var(--text-subtle);
  font-weight: 400;
}

/* ── End screen ─────────────────────────────────────────── */

.dc-end {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

/* Scrollable inner content + fixed bottom nav */
.dc-end-scroll {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--sp-8) var(--sp-5) calc(var(--sp-5) + 64px);
  /* 64px = bottom nav height clearance */
}

.dc-end-scroll > .bottom-nav {
  position: sticky;
  bottom: 0;
  left: 0;
  right: 0;
  margin-top: auto;
}

/* Stick nav at bottom of the scroll container */
.dc-end .bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-width, 480px);
}

.dc-end-actions {
  width: 100%;
  max-width: 400px;
  margin-top: var(--sp-4);
}

/* ── Mini leaderboard ───────────────────────────────────── */

.dc-mini-lb {
  width: 100%;
  max-width: 420px;
  margin-top: var(--sp-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.dc-mini-lb-title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.dc-mini-lb-list {
  display: flex;
  flex-direction: column;
}

.dc-mini-lb-loading,
.dc-mini-lb-empty {
  padding: var(--sp-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-subtle);
  margin: 0;
}

.dc-mini-lb-row {
  display: grid;
  grid-template-columns: 2.5rem 2.5rem 1fr auto;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border);
  transition: background var(--t-fast) var(--ease);
}

.dc-mini-lb-row:last-child {
  border-bottom: none;
}

.dc-mini-lb-row.is-me {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  background: var(--surface-2); /* fallback */
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.dc-mini-lb-rank {
  font-size: 18px;
  line-height: 1;
  text-align: center;
  user-select: none;
}

.dc-mini-lb-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
  color: #0e0e0e;
  flex-shrink: 0;
}

.dc-mini-lb-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dc-mini-lb-row.is-me .dc-mini-lb-name {
  font-weight: 700;
  color: var(--accent);
}

.dc-mini-lb-score {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.dc-mini-lb-denom {
  font-weight: 400;
  color: var(--text-subtle);
  font-size: var(--text-xs);
}

/* ── Responsive adjustments ─────────────────────────────── */

@media (max-width: 360px) {
  .dc-countdown {
    font-size: 2rem;
    padding: var(--sp-2) var(--sp-4);
  }

  .dc-completed-heading {
    font-size: var(--text-xl);
  }
}