/* 各屏与答题组件样式 */

.screen {
  animation: rise 0.35s ease both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 载入 */
.screen--loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 60px 0;
  color: var(--text-dim);
}

.loading__dots {
  display: flex;
  gap: 8px;
}

.loading__dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: var(--glow-warm);
  animation: pulse 1.2s ease-in-out infinite;
}

.loading__dots span:nth-child(2) {
  animation-delay: 0.18s;
}

.loading__dots span:nth-child(3) {
  animation-delay: 0.36s;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(-6px);
  }
}

/* 难度选择 */
.difficulty-grid {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.difficulty-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px;
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.2s ease, background-color 0.2s ease,
    box-shadow 0.24s ease;
}

.difficulty-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 217, 138, 0.55);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 14px 30px rgba(3, 7, 18, 0.42);
}

.difficulty-card__badge {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: auto;
  min-width: 54px;
  height: 54px;
  padding: 0 12px;
  border-radius: 999px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  white-space: nowrap;
  color: #3a1a05;
  background: linear-gradient(150deg, var(--gold), var(--amber));
  box-shadow: var(--glow-warm);
}

.difficulty-card__text {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  flex-direction: column;
  gap: 6px;
}

.difficulty-card--medium .difficulty-card__badge {
  background: linear-gradient(150deg, #ffe6a8, #ffa86b);
}

.difficulty-card--hard .difficulty-card__badge {
  color: #2a0f08;
  background: linear-gradient(150deg, #ffb9a1, var(--ember));
}

.difficulty-card--mixed .difficulty-card__badge {
  color: #05312a;
  background: linear-gradient(150deg, #c8f2e4, var(--jade));
}

.difficulty-card__name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--moon);
}

.difficulty-card__desc {
  font-family: var(--font-kai);
  font-size: clamp(13px, 3.6vw, 15px);
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  /* 断行只发生在逗号、句号处，不把诗句从中间切开 */
  word-break: keep-all;
  overflow-wrap: anywhere;
}

/* 答题 HUD */
#screenPlay {
  margin-block: auto;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 4px;
  font-size: 13px;
  color: var(--text-dim);
}

.hud__item {
  flex: 1;
}

.hud__item--score {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--gold);
}

/* 谜面卡片 */
.riddle {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.riddle__meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.timer {
  position: relative;
  flex: 0 0 auto;
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
}

.timer__ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer__track {
  fill: none;
  stroke: rgba(247, 241, 230, 0.14);
  stroke-width: 5;
}

.timer__progress {
  fill: none;
  stroke: var(--amber);
  stroke-width: 5;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(255, 179, 71, 0.6));
  transition: stroke 0.3s ease;
}

.timer__text {
  position: relative;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--moon);
}

.timer--warn .timer__progress {
  stroke: var(--gold);
}

.timer--danger .timer__progress {
  stroke: var(--danger);
}

.timer--danger .timer__text {
  color: var(--danger);
}

.riddle__topic {
  margin-top: 2px;
  font-size: 15px;
  color: var(--jade);
}

.riddle__question {
  font-family: var(--font-serif);
  font-size: clamp(21px, 5.6vw, 27px);
  line-height: 1.85;
  letter-spacing: 0.04em;
  color: var(--text);
}

/* 选择与填空 */
.answer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.option:hover:not([disabled]) {
  transform: translateX(3px);
  border-color: rgba(255, 217, 138, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.option__index {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--gold);
  background: rgba(255, 217, 138, 0.12);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.option--correct {
  border-color: rgba(127, 209, 185, 0.75);
  background: rgba(127, 209, 185, 0.16);
}

.option--wrong {
  border-color: rgba(255, 138, 138, 0.7);
  background: rgba(255, 138, 138, 0.14);
}

.fill {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.fill__row {
  display: flex;
  gap: 10px;
}

.fill__input {
  flex: 1;
  min-width: 0;
  padding: 13px 16px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--text);
  background: rgba(8, 12, 28, 0.7);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.fill__input::placeholder {
  color: var(--text-faint);
  font-family: var(--font-ui);
  font-size: 14px;
}

.fill__input:focus {
  border-color: rgba(255, 217, 138, 0.6);
  box-shadow: 0 0 0 3px rgba(255, 179, 71, 0.16);
  outline: none;
}

.fill__input--wrong {
  border-color: rgba(255, 138, 138, 0.65);
}

.fill__input--correct {
  border-color: rgba(127, 209, 185, 0.8);
  background: rgba(127, 209, 185, 0.12);
}

.answer__hint {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #ffe6c2;
  background: rgba(255, 179, 71, 0.12);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius-sm);
}

/* 揭晓 */
.reveal {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: rgba(8, 12, 28, 0.6);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  animation: rise 0.28s ease both;
}

.reveal__verdict {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
}

.reveal--correct .reveal__verdict {
  color: var(--jade);
}

.reveal--wrong .reveal__verdict {
  color: var(--danger);
}

.reveal--timeout .reveal__verdict {
  color: var(--amber);
}

.reveal__answer {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--moon);
}

.reveal__points {
  font-size: 14px;
  color: var(--text-dim);
}

.reveal__explanation {
  margin-top: 4px;
  padding-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
  border-top: 1px dashed var(--line-soft);
}

.reveal .btn {
  align-self: flex-start;
  margin-top: 8px;
}

/* 结算 */
.scorecard {
  position: relative;
  margin-top: 18px;
  padding: 22px 18px;
  text-align: center;
  background: linear-gradient(160deg, rgba(30, 42, 82, 0.9), rgba(10, 15, 34, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.scorecard__glow {
  position: absolute;
  top: -60px;
  left: 50%;
  width: 220px;
  height: 220px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 205, 120, 0.32), transparent 68%);
  pointer-events: none;
}

.scorecard__moons {
  width: 44px;
  height: 44px;
  margin: 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 32%, rgba(255, 249, 230, 0.95) 0 18%, transparent 46%),
    radial-gradient(circle at 64% 66%, rgba(246, 219, 168, 0.5) 0 12%, transparent 44%),
    radial-gradient(circle at 32% 30%, #fff8e2 0%, #ffe9b0 50%, #efc983 100%);
  box-shadow: 0 0 24px rgba(255, 205, 120, 0.55);
}

.scorecard__label {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--text-faint);
}

.scorecard__score {
  font-family: var(--font-serif);
  font-size: clamp(46px, 14vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--moon);
  text-shadow: 0 0 26px rgba(255, 205, 120, 0.5);
}

.scorecard__sub {
  font-size: 14px;
  color: var(--text-dim);
}

.scorecard__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.scorecard__stats dt {
  font-size: 12px;
  color: var(--text-faint);
}

.scorecard__stats dd {
  margin-top: 4px;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.5;
  color: var(--gold);
  word-break: keep-all;
}

.review__title {
  margin-top: 28px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--moon);
}

.review {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.review__item {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--jade);
  border-radius: var(--radius-sm);
}

.review__item--wrong {
  border-left-color: var(--danger);
}

.review__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: var(--text-faint);
}

.review__points {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--gold);
}

.review__question {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
}

.review__line {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

.review__line b {
  font-weight: 600;
  color: var(--moon);
}

.review__line--answer {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--moon);
}

.review__explanation {
  margin-top: 8px;
  padding-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-faint);
  border-top: 1px dashed var(--line-soft);
}

/* 错误页 */
.panel--error {
  border-color: rgba(255, 138, 138, 0.35);
}

@media (min-width: 620px) {
  .difficulty-card {
    padding: 20px 24px;
  }
}

/* 矮屏（多数手机、小尺寸笔记本）压缩一些间距，让谜面、选项与解析尽量同屏 */
@media (max-height: 740px) {
  .app {
    gap: 14px;
    padding-top: 16px;
  }

  .riddle {
    margin-top: 8px;
    gap: 14px;
    padding: 16px;
  }

  .timer {
    width: 60px;
    height: 60px;
  }

  .timer__text {
    font-size: 19px;
  }

  .option {
    padding: 11px 14px;
    font-size: 17px;
  }

  .riddle__question {
    line-height: 1.72;
  }

  .reveal {
    padding: 13px;
    gap: 6px;
  }

  .reveal__answer {
    font-size: 19px;
  }
}