:root {
  --bg: #0b1221;
  --bg-secondary: rgba(18, 30, 44, 0.82);
  --bg-panel: rgba(18, 28, 36, 0.78);
  --accent: #ffac33;
  --text: #ffffff;
  --text-soft: #cfd7ff;
  --modal-backdrop: rgba(11, 18, 33, 0.75);
  --shadow: rgba(0, 0, 0, 0.35);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.hidden {
  display: none !important;
}

body {
  min-height: 100vh;
  background: linear-gradient(rgba(8, 16, 24, 0.65), rgba(8, 16, 24, 0.85)), url('../resources/zoo-background.png') center / cover fixed no-repeat;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

#app {
  width: min(620px, 100%);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: 16px;
  box-shadow: 0 12px 32px -12px var(--shadow);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.scoreboard,
.next-emoji {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.95rem;
}

.mute-button {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text);
  font-size: 1.2rem;
  padding: 8px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mute-button:hover {
  background: rgba(255, 172, 51, 0.1);
  border-color: var(--accent);
}

.game-shell {
  display: flex;
  gap: 18px;
  align-items: stretch;
}

.playfield {
  position: relative;
  background: rgba(47, 79, 61, 0.92);
  border-radius: 24px;
  padding: 24px 24px 32px;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.04), 0 18px 48px -24px var(--shadow);
  flex: 1;
}

#game-canvas {
  width: 100%;
  height: auto;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(34, 52, 40, 0.25), rgba(12, 18, 14, 0.82));
  box-shadow: inset 0 10px 22px rgba(0, 0, 0, 0.4);
}

.drop-preview {
  position: absolute;
  pointer-events: none;
  top: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.35);
  padding: 10px 14px;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 1.75rem;
}

.drop-preview small {
  font-size: 0.65rem;
  color: var(--text-soft);
  letter-spacing: 0.04em;
}

.emoji-ladder {
  width: 160px;
  background: var(--bg-panel);
  border-radius: 20px;
  padding: 18px 16px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05), 0 12px 32px -20px var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.emoji-ladder h3 {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.ladder-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ladder-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  padding: 6px 8px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  transition: background 0.2s ease, transform 0.2s ease;
}

.ladder-item.reached {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(2px);
}

.ladder-item.highest {
  background: var(--accent);
  color: #1d1208;
  box-shadow: 0 12px 24px -18px var(--accent);
}

.ladder-item.highest .ladder-rank {
  background: rgba(0, 0, 0, 0.18);
  color: #1d1208;
}

.ladder-rank {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-soft);
}

.ladder-emoji {
  flex: 1;
  text-align: center;
}

.modal {
  position: fixed;
  inset: 0;
  background: var(--modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: 20px;
  padding: 32px 28px;
  text-align: center;
  width: min(320px, 100%);
  box-shadow: 0 22px 40px -20px var(--shadow);
}

.modal-content h2 {
  margin-bottom: 12px;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.primary-button,
.secondary-button {
  width: 100%;
  padding: 12px 24px;
  border: none;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.primary-button {
  background: var(--accent);
  color: #1d1208;
  box-shadow: 0 12px 24px -18px var(--accent);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(1px);
}

@media (max-width: 720px) {
  #app {
    width: min(480px, 100%);
  }

  .game-shell {
    flex-direction: column;
    gap: 16px;
  }

  .emoji-ladder {
    width: 100%;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
  }

  .emoji-ladder h3 {
    width: 100%;
    text-align: center;
    margin-bottom: 6px;
  }

  .ladder-list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .ladder-item {
    flex-direction: column;
    gap: 6px;
    font-size: 1.5rem;
    min-width: 64px;
  }

  .ladder-rank {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }

  body {
    padding: 16px;
  }

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