/* ===== Base Reset & Variables ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg-dark: #0a0a1a;
  --bg-gradient: linear-gradient(135deg, #0a0a1a 0%, #1a1a3a 50%, #0a0a2a 100%);
  --accent-primary: #00ffff;
  --accent-secondary: #ff00ff;
  --accent-fever: #ffaa00;
  --accent-glow: rgba(0, 255, 255, 0.5);
  --text-primary: #ffffff;
  --text-secondary: #aaccff;
  --font-main: 'Orbitron', sans-serif;

  /* Piece Colors */
  --piece-red: #ff4466;
  --piece-blue: #4488ff;
  --piece-green: #44ff88;
  --piece-yellow: #ffdd44;
  --piece-purple: #aa44ff;
  --piece-wild: linear-gradient(45deg, #ff0000, #ff7700, #ffff00, #00ff00, #0077ff, #aa00ff);
}

body {
  font-family: var(--font-main);
  background: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ===== Game Container ===== */
#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ===== Screens ===== */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.screen.active {
  display: flex;
}

/* ===== Stars Background ===== */
.stars-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(2px 2px at 20% 30%, white, transparent),
    radial-gradient(2px 2px at 40% 70%, white, transparent),
    radial-gradient(1px 1px at 50% 10%, white, transparent),
    radial-gradient(1px 1px at 60% 40%, white, transparent),
    radial-gradient(2px 2px at 70% 80%, white, transparent),
    radial-gradient(1px 1px at 80% 20%, white, transparent),
    radial-gradient(2px 2px at 90% 60%, white, transparent),
    radial-gradient(1px 1px at 10% 50%, white, transparent),
    radial-gradient(1px 1px at 30% 90%, white, transparent),
    radial-gradient(2px 2px at 85% 45%, white, transparent);
  pointer-events: none;
  animation: twinkle 4s ease-in-out infinite alternate;
}

@keyframes twinkle {
  0% {
    opacity: 0.7;
  }

  100% {
    opacity: 1;
  }
}

/* ===== Title Screen ===== */
.title-content {
  text-align: center;
  z-index: 10;
}

.game-title {
  font-size: clamp(2rem, 8vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  text-shadow:
    0 0 20px var(--accent-primary),
    0 0 40px var(--accent-primary);
}

.title-line {
  display: block;
  animation: titleGlow 2s ease-in-out infinite alternate;
}

.title-line.fever {
  color: var(--accent-fever);
  text-shadow:
    0 0 20px var(--accent-fever),
    0 0 40px var(--accent-fever);
  animation: feverGlow 1s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  0% {
    text-shadow: 0 0 20px var(--accent-primary), 0 0 40px var(--accent-primary);
  }

  100% {
    text-shadow: 0 0 30px var(--accent-secondary), 0 0 60px var(--accent-secondary);
  }
}

@keyframes feverGlow {
  0% {
    transform: scale(1);
  }

  100% {
    transform: scale(1.05);
    text-shadow: 0 0 40px var(--accent-fever), 0 0 80px var(--accent-fever);
  }
}

.subtitle {
  font-size: clamp(0.8rem, 3vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: 3rem;
  letter-spacing: 0.3em;
}

/* ===== Buttons ===== */
.menu-btn {
  display: block;
  width: 200px;
  margin: 0.8rem auto;
  padding: 1rem 2rem;
  font-family: var(--font-main);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.2));
  border: 2px solid var(--accent-primary);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.menu-btn:hover {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.4), rgba(255, 0, 255, 0.4));
  box-shadow: 0 0 30px var(--accent-glow);
  transform: scale(1.05);
}

.menu-btn.pulse {
  animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {

  0%,
  100% {
    box-shadow: 0 0 10px var(--accent-glow);
  }

  50% {
    box-shadow: 0 0 30px var(--accent-glow), 0 0 50px var(--accent-primary);
  }
}

/* ===== How To Play ===== */
.howto-content {
  text-align: center;
  padding: 2rem;
  max-width: 400px;
}

.howto-content.expanded {
  max-width: 500px;
  max-height: 85vh;
  overflow-y: auto;
  background: rgba(10, 10, 26, 0.9);
  border-radius: 20px;
  border: 1px solid rgba(0, 255, 255, 0.3);
}

.howto-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--accent-primary);
}

/* Tabs */
.howto-tabs {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.howto-tab {
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.howto-tab:hover {
  background: rgba(0, 255, 255, 0.1);
  border-color: var(--accent-primary);
}

.howto-tab.active {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.1));
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

/* Tab Content */
.howto-tab-content {
  display: none;
  text-align: left;
}

.howto-tab-content.active {
  display: block;
}

/* Sections */
.howto-section {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
}

.howto-section h3 {
  font-size: 1.1rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
  text-align: left;
}

.howto-list {
  margin-bottom: 2rem;
}

.howto-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin: 1rem 0;
  text-align: left;
}

.howto-icon {
  font-size: 1.8rem;
  min-width: 40px;
  text-align: center;
}

.howto-text {
  flex: 1;
}

.howto-text strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.howto-item p,
.howto-text p {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* Mode Boxes */
.mode-box {
  padding: 1rem;
  border-radius: 10px;
  margin-top: 0.5rem;
}

.mode-box.classic {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.1), rgba(0, 100, 200, 0.05));
  border: 1px solid rgba(0, 255, 255, 0.3);
}

.mode-box.chainrush {
  background: linear-gradient(135deg, rgba(255, 170, 0, 0.15), rgba(255, 100, 0, 0.05));
  border: 1px solid var(--accent-fever);
}

.mode-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.stat {
  display: flex;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.mode-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Time Bonus Table */
.time-bonus-table {
  margin-top: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 0.8rem;
}

.time-bonus-table h4 {
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.bonus-row {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.bonus-row:last-child {
  border-bottom: none;
}

.bonus-row.highlight {
  background: rgba(255, 170, 0, 0.1);
  margin: 0.3rem -0.5rem;
  padding: 0.4rem 0.5rem;
  border-radius: 5px;
}

.bonus-value {
  color: #00ff88;
  font-weight: 700;
}

/* Tips */
.tip-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.8rem;
  border-radius: 8px;
}

.tip-num {
  min-width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-primary);
  color: var(--bg-dark);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 50%;
}

.tip-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

.tip-item p strong {
  color: var(--text-primary);
}

/* Scrollbar for howto content */
.howto-content.expanded::-webkit-scrollbar {
  width: 6px;
}

.howto-content.expanded::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
}

.howto-content.expanded::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 3px;
}

/* Responsive */
@media (max-width: 600px) {
  .howto-content.expanded {
    max-width: 95%;
    padding: 1rem;
    max-height: 80vh;
  }

  .howto-tabs {
    gap: 0.3rem;
  }

  .howto-tab {
    padding: 0.4rem 0.7rem;
    font-size: 0.75rem;
  }

  .howto-section {
    padding: 0.8rem;
  }

  .mode-stats {
    flex-wrap: wrap;
  }
}

/* ===== Game Screen ===== */
#game-screen {
  background: var(--bg-gradient);
}

#game-canvas {
  border-radius: 10px;
  box-shadow:
    0 0 20px rgba(0, 255, 255, 0.3),
    inset 0 0 50px rgba(0, 0, 0, 0.5);
  touch-action: none;
}

/* ===== HUD ===== */
#hud {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2rem;
  z-index: 100;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  border: 1px solid rgba(0, 255, 255, 0.3);
}

.hud-label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
}

#time-display,
#score-display {
  text-align: center;
}

#time-value,
#score-value {
  font-size: 1.8rem;
  font-weight: 700;
}

#time-value.warning {
  color: #ff4444;
  animation: timeWarning 0.5s ease-in-out infinite alternate;
}

@keyframes timeWarning {
  0% {
    opacity: 1;
    transform: scale(1);
  }

  100% {
    opacity: 0.7;
    transform: scale(1.1);
  }
}

/* ===== Fever Gauge ===== */
#fever-gauge-container {
  text-align: center;
}

#fever-gauge {
  width: 100px;
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--accent-fever);
}

#fever-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-fever), #ff0000);
  border-radius: 6px;
  transition: width 0.3s ease;
}

#fever-gauge.full {
  animation: gaugeFullPulse 0.3s ease-in-out infinite alternate;
}

@keyframes gaugeFullPulse {
  0% {
    box-shadow: 0 0 5px var(--accent-fever);
  }

  100% {
    box-shadow: 0 0 20px var(--accent-fever), 0 0 30px var(--accent-fever);
  }
}

/* ===== Combo Display ===== */
#combo-display {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 50;
  pointer-events: none;
}

#combo-display.hidden {
  display: none;
}

#combo-value {
  display: block;
  font-size: 5rem;
  font-weight: 900;
  color: var(--accent-primary);
  text-shadow:
    0 0 20px var(--accent-primary),
    0 0 40px var(--accent-primary);
  animation: comboPopIn 0.3s ease-out;
}

#combo-label {
  display: block;
  font-size: 1.5rem;
  color: var(--text-secondary);
  letter-spacing: 0.3em;
}

@keyframes comboPopIn {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }

  70% {
    transform: scale(1.2);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== Fever Banner ===== */
#fever-banner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  font-weight: 900;
  color: var(--accent-fever);
  text-shadow:
    0 0 30px var(--accent-fever),
    0 0 60px var(--accent-fever),
    0 0 100px var(--accent-fever);
  z-index: 200;
  animation: feverBannerAnim 0.8s ease-out forwards;
}

#fever-banner.hidden {
  display: none;
}

@keyframes feverBannerAnim {
  0% {
    transform: translate(-50%, -50%) scale(0) rotate(-10deg);
    opacity: 0;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.3) rotate(5deg);
    opacity: 1;
  }

  70% {
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
  }

  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}

/* ===== Countdown ===== */
#countdown {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 300;
}

#countdown.hidden {
  display: none;
}

#countdown-value {
  font-size: 8rem;
  font-weight: 900;
  color: var(--accent-primary);
  text-shadow:
    0 0 30px var(--accent-primary),
    0 0 60px var(--accent-primary);
  animation: countdownPop 1s ease-out;
}

@keyframes countdownPop {
  0% {
    transform: scale(2);
    opacity: 0;
  }

  30% {
    transform: scale(1);
    opacity: 1;
  }

  100% {
    transform: scale(0.8);
    opacity: 0;
  }
}

/* ===== Result Screen ===== */
.result-content {
  text-align: center;
  padding: 2rem;
}

.result-title {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-primary);
  margin-bottom: 2rem;
  text-shadow:
    0 0 20px var(--accent-primary),
    0 0 40px var(--accent-primary);
}

.result-scores {
  margin-bottom: 2rem;
}

.score-item {
  margin: 1.5rem 0;
}

.score-label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.score-num {
  font-size: 2.5rem;
  font-weight: 700;
}

#new-record {
  color: var(--accent-fever);
  font-size: 1.5rem;
  font-weight: 700;
  animation: newRecordBlink 0.5s ease-in-out infinite alternate;
}

#new-record.hidden {
  display: none;
}

@keyframes newRecordBlink {
  0% {
    opacity: 0.5;
  }

  100% {
    opacity: 1;
  }
}

.result-buttons {
  margin-top: 2rem;
}

/* ===== Fever Mode Overlay ===== */
.fever-active {
  animation: feverBgPulse 0.5s ease-in-out infinite alternate;
}

@keyframes feverBgPulse {
  0% {
    box-shadow: inset 0 0 100px rgba(255, 170, 0, 0.1);
  }

  100% {
    box-shadow: inset 0 0 100px rgba(255, 170, 0, 0.3);
  }
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  #hud {
    gap: 1rem;
    padding: 8px 15px;
  }

  .hud-label {
    font-size: 0.6rem;
  }

  #time-value,
  #score-value {
    font-size: 1.4rem;
  }

  #fever-gauge {
    width: 70px;
  }

  .menu-btn {
    width: 160px;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
  }
}

/* ===== Utility ===== */
.hidden {
  display: none !important;
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.modal.hidden {
  display: none !important;
}

.modal-content {
  background: linear-gradient(135deg, #1a1a3a 0%, #0a0a2a 100%);
  border: 2px solid var(--accent-primary);
  border-radius: 20px;
  padding: 2rem;
  max-width: 400px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow:
    0 0 30px var(--accent-glow),
    inset 0 0 50px rgba(0, 0, 0, 0.5);
}

.modal-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent-primary);
  text-align: center;
  margin-bottom: 1.5rem;
  text-shadow:
    0 0 20px var(--accent-primary),
    0 0 40px var(--accent-primary);
  letter-spacing: 0.1em;
}

/* ===== Ranking List ===== */
.ranking-list {
  margin-bottom: 1.5rem;
}

.ranking-entry {
  display: flex;
  align-items: center;
  padding: 0.8rem 1rem;
  margin: 0.5rem 0;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  border: 1px solid rgba(0, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.ranking-entry:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
}

.ranking-entry.gold {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 170, 0, 0.1));
  border-color: #ffd700;
}

.ranking-entry.silver {
  background: linear-gradient(135deg, rgba(192, 192, 192, 0.2), rgba(150, 150, 150, 0.1));
  border-color: #c0c0c0;
}

.ranking-entry.bronze {
  background: linear-gradient(135deg, rgba(205, 127, 50, 0.2), rgba(180, 100, 30, 0.1));
  border-color: #cd7f32;
}

.ranking-entry.highlight {
  animation: highlightPulse 1s ease-in-out infinite alternate;
}

@keyframes highlightPulse {
  0% {
    box-shadow: 0 0 10px var(--accent-fever);
  }

  100% {
    box-shadow: 0 0 20px var(--accent-fever), 0 0 30px var(--accent-fever);
  }
}

.ranking-rank {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-primary);
  min-width: 50px;
  text-align: center;
}

.ranking-entry.gold .ranking-rank {
  color: #ffd700;
}

.ranking-entry.silver .ranking-rank {
  color: #c0c0c0;
}

.ranking-entry.bronze .ranking-rank {
  color: #cd7f32;
}

.ranking-score {
  flex: 1;
  font-size: 1.3rem;
  font-weight: 700;
  text-align: right;
  margin-right: 1rem;
}

.ranking-date {
  font-size: 0.7rem;
  color: var(--text-secondary);
  min-width: 70px;
  text-align: right;
}

.ranking-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem;
  font-size: 0.9rem;
}

/* ===== Volume Settings ===== */
.volume-settings {
  margin-top: 2rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.volume-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.volume-row:last-child {
  margin-bottom: 0;
}

.volume-label {
  font-size: 0.9rem;
  min-width: 70px;
  color: var(--text-secondary);
}

.volume-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(68, 136, 255, 0.5);
  transition: transform 0.1s;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

.volume-value {
  font-size: 0.8rem;
  min-width: 35px;
  text-align: right;
  color: var(--text-secondary);
}

/* ===== Pause Modal ===== */
.pause-content {
  text-align: center;
}

.pause-hint {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.pause-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

/* ===== Mode Selector ===== */
.mode-selector {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.8rem 1.2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(0, 255, 255, 0.3);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 120px;
}

.mode-btn:hover {
  background: rgba(0, 255, 255, 0.1);
  border-color: var(--accent-primary);
}

.mode-btn.active {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.1));
  border-color: var(--accent-primary);
  box-shadow: 0 0 15px var(--accent-glow);
}

.mode-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.mode-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

.mode-btn.active .mode-name {
  color: var(--accent-primary);
}

/* ===== Time Add Popup ===== */
.time-add-popup {
  position: absolute;
  top: -5px;
  right: -40px;
  font-size: 1rem;
  font-weight: 700;
  color: #00ff88;
  text-shadow: 0 0 10px rgba(0, 255, 136, 0.8);
  animation: timeAddPop 0.8s ease-out forwards;
  pointer-events: none;
  white-space: nowrap;
}

.time-add-popup.hidden {
  display: none;
}

@keyframes timeAddPop {
  0% {
    transform: translateY(0) scale(0.5);
    opacity: 0;
  }

  20% {
    transform: translateY(-5px) scale(1.2);
    opacity: 1;
  }

  100% {
    transform: translateY(-30px) scale(1);
    opacity: 0;
  }
}

/* ===== Mode Indicator ===== */
.mode-indicator {
  position: absolute;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-fever);
  text-shadow: 0 0 10px var(--accent-fever);
  letter-spacing: 0.2em;
  padding: 0.3rem 0.8rem;
  background: rgba(255, 170, 0, 0.15);
  border: 1px solid var(--accent-fever);
  border-radius: 5px;
  z-index: 100;
}

.mode-indicator.hidden {
  display: none;
}

/* ===== Time Display Position for Popup ===== */
#time-display {
  position: relative;
}

/* ===== Responsive for Mode Selector ===== */
@media (max-width: 600px) {
  .mode-selector {
    gap: 0.5rem;
  }

  .mode-btn {
    min-width: 100px;
    padding: 0.6rem 0.8rem;
  }

  .mode-name {
    font-size: 0.85rem;
  }

  .mode-desc {
    font-size: 0.6rem;
  }

  .mode-indicator {
    top: 55px;
    font-size: 0.7rem;
  }

  .time-add-popup {
    font-size: 0.85rem;
    right: -30px;
  }
}