:root {
  --cream: #fff8ea;
  --paper: #fffdf7;
  --ink: #43352e;
  --ink-soft: #7d6658;
  --coral: #ff7f8f;
  --coral-deep: #ef5f78;
  --gold: #ffc85a;
  --teal: #0d6b75;
  --teal-soft: #3e9aa0;
  --ui-font: "Nunito", "M PLUS Rounded 1c", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  font-family: var(--ui-font);
  color: var(--ink);
  background: #45b9c2;
  user-select: none;
  -webkit-user-select: none;
}

button {
  font-family: inherit;
  border: 0;
  cursor: pointer;
}

.app {
  position: fixed;
  inset: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

#pond {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

/* ---------- HUD ---------- */

.hud {
  position: absolute;
  z-index: 5;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 12px;
  padding: max(16px, env(safe-area-inset-top)) clamp(14px, 3vw, 34px) 0;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.hud.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hud-side {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.hud-right {
  justify-content: flex-end;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 44px;
  padding: 0 15px;
  border-radius: 999px;
  background: rgba(255, 250, 238, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 22px rgba(11, 76, 83, 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.pill svg {
  width: 20px;
  height: 20px;
  flex: none;
}

.pill strong {
  font-size: 19px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.timer-pill.is-low {
  color: #d94c5f;
  background: rgba(255, 240, 236, 0.94);
  animation: timerPulse 0.8s ease-in-out infinite;
}

.best-pill {
  color: var(--ink-soft);
  gap: 6px;
}

.best-pill strong {
  color: var(--coral-deep);
  font-size: 17px;
}

.score-block {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 120px;
  padding-top: 1px;
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.32);
}

.score-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: rgba(13, 78, 87, 0.7);
}

.score {
  font-size: clamp(38px, 5.2vw, 58px);
  line-height: 0.98;
  font-weight: 900;
  color: #fffdf4;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  text-shadow:
    0 2px 0 #2b8188,
    0 4px 0 rgba(20, 105, 112, 0.38),
    0 10px 26px rgba(9, 66, 76, 0.28);
}

.score.is-popping {
  animation: scorePop 0.28s ease;
}

.combo-tag {
  position: absolute;
  top: calc(100% + 5px);
  left: 50%;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px 6px;
  border-radius: 999px;
  color: #8c4b18;
  background: linear-gradient(135deg, #fff3bd, #ffd76c);
  box-shadow: 0 5px 14px rgba(120, 82, 10, 0.16);
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, -4px) scale(0.9);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.combo-tag.is-visible {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.combo-word {
  font-size: 10px;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.combo-track {
  width: 34px;
  height: 3px;
  margin-left: 2px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(140, 75, 24, 0.18);
}

.combo-track i {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: #b8711c;
  transform-origin: left center;
}

.icon-btn {
  pointer-events: auto;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  color: var(--teal);
  background: rgba(255, 250, 238, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 22px rgba(11, 76, 83, 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.18s ease, background 0.18s ease;
}

.icon-btn:hover {
  transform: translateY(-2px);
  background: #fffdf5;
}

.icon-btn:active {
  transform: scale(0.94);
}

.icon-btn svg {
  width: 22px;
  height: 22px;
}

.icon-sound-off {
  display: none;
}

.icon-btn.is-muted .icon-sound-on {
  display: none;
}

.icon-btn.is-muted .icon-sound-off {
  display: block;
}

/* ---------- Dash ---------- */

.dash-btn {
  position: absolute;
  z-index: 6;
  right: max(20px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  padding: 0;
  border-radius: 50%;
  color: #fffdf7;
  background: linear-gradient(150deg, #ffa36f, var(--coral-deep));
  border: 3px solid rgba(255, 250, 238, 0.72);
  box-shadow:
    0 6px 0 rgba(169, 54, 74, 0.35),
    0 16px 30px rgba(72, 27, 35, 0.22),
    inset 0 2px 0 rgba(255, 255, 255, 0.35);
  opacity: 0;
  transform: translateY(14px) scale(0.9);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, filter 0.2s ease;
  touch-action: none;
}

.dash-btn.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.dash-btn:active {
  transform: translateY(3px) scale(0.96);
  box-shadow:
    0 3px 0 rgba(169, 54, 74, 0.35),
    0 8px 18px rgba(72, 27, 35, 0.22);
}

.dash-btn.is-cooling {
  filter: saturate(0.45) brightness(0.92);
}

.dash-icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: -5px;
}

.dash-icon svg {
  width: 25px;
  height: 25px;
  filter: drop-shadow(0 2px 0 rgba(140, 43, 58, 0.24));
}

.dash-label {
  margin-top: 1px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
  line-height: 1.15;
}

.dash-key {
  margin-top: 1px;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.dash-cd {
  position: absolute;
  inset: -3px;
  z-index: 2;
  border-radius: 50%;
  background: conic-gradient(rgba(31, 73, 76, 0.48) calc(var(--cd, 0) * 1%), transparent 0);
  pointer-events: none;
  transition: background 0.08s linear;
}

.dash-btn.is-cooling .dash-key {
  opacity: 0;
}

/* ---------- Hint ---------- */

.hint {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: max(28px, env(safe-area-inset-bottom));
  max-width: min(76vw, 360px);
  padding: 10px 18px;
  border-radius: 999px;
  color: rgba(255, 253, 246, 0.96);
  background: rgba(20, 89, 95, 0.56);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  opacity: 0;
  transform: translate(-50%, 8px);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.hint.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}