.panel,
.word-panel {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, white), var(--panel));
  border: 1px solid var(--border);
  border-radius: .75rem;
}

.panel {
  box-shadow: var(--shadow);
  padding: .9rem;
  margin-top: .7rem;
}

.word-panel {
  padding: .55rem;
  margin: .25rem 0 .55rem;
  flex: 0 1 auto;
  min-height: 0;
}

.completion-dialog {
  width: min(calc(100% - 2rem), 380px);
  overflow: hidden;
  text-align: center;
  border-color: color-mix(in srgb, var(--success) 48%, var(--border));
  background-color: var(--panel);
  background:
    radial-gradient(circle at 50% 18%, color-mix(in srgb, var(--success-soft) 72%, transparent), transparent 8rem),
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, white), var(--panel));
  box-shadow:
    0 32px 90px rgba(8, 14, 26, .36),
    0 0 0 1px rgba(255, 255, 255, .48) inset;
}

.completion-dialog form {
  position: relative;
  display: grid;
  gap: .72rem;
  min-height: 15.2rem;
  place-items: center;
  padding: 2.1rem 1.2rem 1.15rem;
}

.completion-dialog strong {
  display: block;
  font-size: clamp(1.38rem, 6.2vw, 2.15rem);
  line-height: 1.02;
  animation: victoryPop 420ms cubic-bezier(.18, .86, .24, 1.08);
}

.completion-dialog .helper {
  min-height: 1.3rem;
  margin: 0;
  color: var(--success);
  font-size: 1rem;
  font-weight: 800;
}

.completion-stars {
  display: flex;
  gap: .3rem;
  align-items: center;
  justify-content: center;
  min-height: 1.8rem;
}

.completion-star {
  color: color-mix(in srgb, var(--border) 70%, white);
  font-size: 1.5rem;
  line-height: 1;
  transform: scale(.92);
}

.completion-star.earned {
  color: #f6b73c;
  text-shadow: 0 0 18px rgba(246, 183, 60, .32);
  animation: rewardPulse 900ms ease-in-out both;
}

.completion-star.half {
  background: linear-gradient(
    90deg,
    #f6b73c 50%,
    color-mix(in srgb, var(--border) 70%, white) 50%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: rewardPulse 900ms ease-in-out both;
}

.completion-star:nth-child(2).earned,
.completion-star:nth-child(2).half {
  animation-delay: 80ms;
}

.completion-star:nth-child(3).earned,
.completion-star:nth-child(3).half {
  animation-delay: 160ms;
}

.completion-remark {
  margin: 0;
  color: var(--text);
  font-size: .98rem;
  font-weight: 760;
}

.completion-block-note {
  margin: 0;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.35;
}

.completion-block-summary {
  width: 100%;
  padding: .65rem .75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--border));
  border-radius: .72rem;
  background: color-mix(in srgb, var(--accent-soft) 42%, var(--panel));
}

.completion-block-summary strong {
  font-size: 1.02rem;
  animation: none;
}

.completion-block-summary p {
  margin: .22rem 0 0;
  color: var(--muted);
  font-size: .86rem;
  font-weight: 700;
  line-height: 1.3;
}

.completion-dialog.block-reward-glow .completion-block-summary {
  animation: blockRewardGlow 1.5s ease-out both;
}

.completion-dialog.block-reward-celebrate .completion-block-summary {
  border-color: color-mix(in srgb, #f6b73c 68%, var(--border));
  background: linear-gradient(120deg, color-mix(in srgb, #f6b73c 22%, var(--panel)), color-mix(in srgb, var(--accent-soft) 46%, var(--panel)));
  animation: blockRewardCelebrate 1.2s cubic-bezier(.18, .86, .24, 1.08) both;
}

.completion-dialog.block-reward-perfect .completion-block-summary {
  border-color: color-mix(in srgb, #f6b73c 82%, var(--border));
  background: linear-gradient(120deg, color-mix(in srgb, #f6b73c 34%, var(--panel)), color-mix(in srgb, var(--success-soft) 58%, var(--panel)), color-mix(in srgb, var(--accent-soft) 54%, var(--panel)));
  animation: blockRewardPerfect 1.5s cubic-bezier(.18, .86, .24, 1.08) both;
}

.victory-burst {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.victory-burst span {
  position: absolute;
  left: 50%;
  top: 42%;
  width: .42rem;
  height: 2.1rem;
  border-radius: 999px;
  background: var(--accent);
  transform-origin: 50% 6.5rem;
  animation: burst 980ms cubic-bezier(.2, .8, .2, 1) both;
}

.victory-burst span:nth-child(1) { --burst-rotation: 0deg; }
.victory-burst span:nth-child(2) { --burst-rotation: 60deg; background: var(--c2); }
.victory-burst span:nth-child(3) { --burst-rotation: 120deg; background: var(--c3); }
.victory-burst span:nth-child(4) { --burst-rotation: 180deg; background: var(--c5); }
.victory-burst span:nth-child(5) { --burst-rotation: 240deg; background: var(--c6); }
.victory-burst span:nth-child(6) { --burst-rotation: 300deg; background: var(--c9); }

.hidden { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}