:root {
  --bg-top: #fff6d6;
  --bg-bottom: #c9efff;
  --card: rgba(255, 255, 255, 0.86);
  --card-border: rgba(255, 255, 255, 0.9);
  --ink: #27404f;
  --accent: #ff8c42;
  --accent-deep: #f15a29;
  --green: #3bb273;
  --red: #f25f5c;
  --blue: #3a86ff;
  --shadow: 0 18px 40px rgba(62, 87, 109, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 28%),
    radial-gradient(circle at 90% 20%, rgba(255, 205, 117, 0.5), transparent 22%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.app-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.hero-card,
.card {
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--card-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-card {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  margin-bottom: 22px;
}

.eyebrow,
h1,
h2,
h3,
.stat-box strong,
.target-text,
.mode-btn,
.difficulty-btn,
.start-btn,
.mini-card strong {
  font-family: "Baloo 2", "Noto Sans SC", sans-serif;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--accent-deep);
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1;
}

.hero-text {
  max-width: 620px;
  margin: 12px 0 0;
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(88px, 1fr));
  gap: 14px;
  min-width: min(100%, 320px);
}

.stat-box,
.mini-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 22px;
  padding: 16px 10px;
  background: rgba(255, 255, 255, 0.72);
}

.stat-box span,
.mini-card span {
  font-size: 0.9rem;
}

.stat-box strong,
.mini-card strong {
  font-size: 2rem;
  line-height: 1;
  margin-top: 6px;
}

.game-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 22px;
}

.control-panel,
.play-panel {
  padding: 24px;
}

.control-panel h2,
.play-panel h3,
.tips-box h3 {
  margin-top: 0;
}

.mode-list,
.difficulty-list {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.mode-btn,
.difficulty-btn,
.start-btn {
  border: 0;
  border-radius: 18px;
  padding: 14px 16px;
  font-size: 1.08rem;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.mode-btn,
.difficulty-btn {
  background: #fff;
  color: var(--ink);
  box-shadow: inset 0 0 0 2px rgba(39, 64, 79, 0.08);
}

.mode-btn.active,
.difficulty-btn.active {
  background: linear-gradient(135deg, #ffd166, #ff9f1c);
}

.start-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  box-shadow: 0 10px 24px rgba(241, 90, 41, 0.26);
}

.mode-btn:hover,
.difficulty-btn:hover,
.start-btn:hover {
  transform: translateY(-1px);
}

.tips-box {
  margin-top: 20px;
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 249, 230, 0.95);
}

.tips-box ul {
  margin: 10px 0 0;
  padding-left: 18px;
  line-height: 1.8;
}

.status-row,
.result-row {
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
}

.message {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.message.good {
  color: var(--green);
}

.message.bad {
  color: var(--red);
}

.stars {
  min-width: 96px;
  font-size: 1.6rem;
  text-align: right;
  letter-spacing: 2px;
  color: #ffb703;
}

.track-area {
  position: relative;
  overflow: hidden;
  margin: 22px 0;
  min-height: 270px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(135, 206, 235, 0.44), rgba(255, 255, 255, 0.4)),
    linear-gradient(180deg, #d8f3ff 0 70%, #a8e6a1 70% 100%);
}

.track-line {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 62px;
  height: 8px;
  border-radius: 999px;
  background: repeating-linear-gradient(
    90deg,
    #8d6e63 0 28px,
    #5d4037 28px 40px
  );
}

.target-train {
  position: absolute;
  left: 30px;
  bottom: 70px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 24px;
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 16px 28px rgba(58, 134, 255, 0.18);
  transform: translateX(0);
}

.target-train.animate {
  transition: transform linear;
}

.target-train.idle {
  animation: floatTrain 2.2s ease-in-out infinite;
}

.engine {
  font-size: 2rem;
}

.target-text {
  min-width: 72px;
  text-align: center;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1;
  text-transform: uppercase;
}

.result-row {
  margin-bottom: 20px;
}

.mini-card {
  flex: 1;
}

.keyboard-card {
  padding: 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.74);
}

.keyboard {
  display: grid;
  gap: 10px;
}

.keyboard-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.key {
  min-width: 42px;
  padding: 12px 10px;
  text-align: center;
  border-radius: 14px;
  background: #eff7ff;
  box-shadow: inset 0 -4px 0 rgba(58, 134, 255, 0.2);
  font-family: "Baloo 2", sans-serif;
  font-size: 1.05rem;
  text-transform: uppercase;
}

.key.active {
  background: #ffd166;
  transform: translateY(-2px);
}

.key.hit {
  background: #95d5b2;
}

.key.miss {
  background: #ffb4a2;
}

@keyframes floatTrain {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@media (max-width: 920px) {
  .hero-card,
  .status-row,
  .result-row,
  .game-grid {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .hero-stats {
    min-width: 0;
  }

  .stars {
    text-align: left;
  }
}

@media (max-width: 620px) {
  .app-shell {
    width: min(100vw - 18px, 100%);
    padding-top: 10px;
  }

  .hero-card,
  .control-panel,
  .play-panel {
    padding: 18px;
    border-radius: 22px;
  }

  .target-train {
    left: 16px;
    right: 16px;
    justify-content: center;
  }

  .track-line {
    left: 12px;
    right: 12px;
  }
}