:root {
  --bg-top: #07101d;
  --bg-bottom: #01040c;
  --panel: rgba(8, 17, 32, 0.8);
  --panel-strong: rgba(10, 22, 42, 0.92);
  --ink: #edf6ff;
  --ink-soft: #9eb5d2;
  --accent: #57d6ff;
  --accent-dark: #bff7ff;
  --accent-soft: rgba(87, 214, 255, 0.12);
  --good: #7ef0bf;
  --bad: #ff738f;
  --gold: #ffd37a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body {
  position: relative;
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: "IBM Plex Sans KR", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 58%, rgba(5, 10, 20, 0.96) 0 9%, rgba(10, 18, 31, 0.88) 10%, transparent 21%),
    radial-gradient(circle at 50% 58%, rgba(87, 214, 255, 0.18) 0 14%, transparent 28%),
    radial-gradient(circle at 18% 22%, rgba(69, 137, 255, 0.18), transparent 26%),
    radial-gradient(circle at 80% 18%, rgba(87, 214, 255, 0.1), transparent 22%),
    radial-gradient(circle at 54% 112%, rgba(255, 211, 122, 0.12), transparent 30%),
    linear-gradient(180deg, #091226 0%, #040914 50%, var(--bg-bottom) 100%);
  overflow: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background-image:
    radial-gradient(circle at 12% 24%, rgba(255, 255, 255, 0.9) 0 1px, transparent 1.5px),
    radial-gradient(circle at 78% 14%, rgba(255, 255, 255, 0.85) 0 1px, transparent 1.5px),
    radial-gradient(circle at 32% 68%, rgba(135, 245, 255, 0.8) 0 1px, transparent 1.5px),
    radial-gradient(circle at 64% 54%, rgba(255, 255, 255, 0.65) 0 1px, transparent 1.5px),
    radial-gradient(circle at 88% 78%, rgba(114, 241, 184, 0.72) 0 1px, transparent 1.5px),
    radial-gradient(circle at 18% 86%, rgba(255, 255, 255, 0.7) 0 1px, transparent 1.5px);
  opacity: 0.9;
  animation: starDrift 18s ease-in-out infinite alternate;
}

body::after {
  background:
    radial-gradient(circle at 52% 56%, rgba(87, 214, 255, 0.1), transparent 18%),
    radial-gradient(circle at 48% 61%, rgba(255, 211, 122, 0.08), transparent 24%),
    linear-gradient(120deg, transparent 0%, rgba(87, 214, 255, 0.05) 46%, transparent 54%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent 36%);
  mix-blend-mode: screen;
  animation: nebulaPulse 12s ease-in-out infinite;
}

button {
  font: inherit;
}

.app-shell {
  position: relative;
  isolation: isolate;
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 28px 0;
}

.app-shell::before {
  content: "";
  position: absolute;
  inset: 5% 8%;
  border-radius: 50%;
  border: 1px solid rgba(87, 214, 255, 0.08);
  box-shadow:
    0 0 90px rgba(87, 214, 255, 0.05),
    inset 0 0 50px rgba(87, 214, 255, 0.03);
  transform: perspective(1200px) rotateX(72deg);
  z-index: -1;
  pointer-events: none;
  animation: orbitFloat 14s ease-in-out infinite;
}

.screen {
  display: none;
  width: 100%;
  max-height: calc(100vh - 24px);
  max-height: calc(100dvh - 24px);
}

.screen-active {
  display: block;
}

#game-screen.screen-active {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 8px;
  height: calc(100vh - 24px);
  height: calc(100dvh - 24px);
  max-height: calc(100vh - 24px);
  max-height: calc(100dvh - 24px);
  align-self: stretch;
}

.panel {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid rgba(123, 205, 255, 0.16);
  border-radius: var(--radius-xl);
  box-shadow:
    var(--shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    inset 0 -20px 40px rgba(1, 5, 15, 0.22);
  backdrop-filter: blur(16px);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 24%),
    radial-gradient(circle at top right, rgba(87, 214, 255, 0.08), transparent 26%);
  pointer-events: none;
}

.hero-panel,
.result-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: 44px 36px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.intro-panel {
  max-width: 860px;
}

.player-screen-panel {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  text-shadow: 0 0 18px rgba(52, 214, 255, 0.2);
}

h1,
h2 {
  margin: 0;
  font-family: "Do Hyeon", sans-serif;
  font-weight: 400;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 1.05;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.hero-copy,
.result-summary {
  margin: 18px auto 0;
  max-width: 560px;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

.player-copy {
  max-width: 500px;
}

.guide-panel {
  margin-top: 22px;
  padding: 24px;
  border-radius: 24px;
  background: rgba(9, 24, 45, 0.82);
  border: 1px solid rgba(87, 214, 255, 0.16);
  text-align: left;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.guide-header {
  margin-bottom: 16px;
}

.guide-header .eyebrow {
  margin-bottom: 6px;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.guide-card {
  min-height: 132px;
  padding: 16px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(17, 35, 63, 0.95), rgba(9, 20, 37, 0.95));
  border: 1px solid rgba(87, 214, 255, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.03),
    0 10px 24px rgba(0, 0, 0, 0.18);
}

.guide-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 28px;
  border-radius: 999px;
  background: rgba(87, 214, 255, 0.14);
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.guide-card h3 {
  margin: 12px 0 8px;
  font-size: 1.05rem;
  color: var(--ink);
}

.guide-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
  font-size: 0.93rem;
}

.intro-actions {
  margin-top: 18px;
}

.rule-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 30px 0 34px;
}

.rule-strip span {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(13, 29, 53, 0.88);
  border: 1px solid rgba(52, 214, 255, 0.16);
  font-weight: 600;
  color: #d8ebff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.primary-button {
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #7be7ff, #67f4c6);
  color: #04111d;
  padding: 16px 28px;
  min-width: 180px;
  font-weight: 700;
  cursor: pointer;
  box-shadow:
    0 14px 30px rgba(87, 214, 255, 0.22),
    0 0 24px rgba(87, 214, 255, 0.12);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  filter: saturate(1.06);
}

.primary-button:active {
  transform: translateY(0);
}

.secondary-button {
  border: 1px solid rgba(52, 214, 255, 0.22);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(16, 31, 56, 0.94), rgba(9, 18, 34, 0.94));
  color: var(--accent-dark);
  padding: 14px 22px;
  min-width: 160px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
}

.secondary-button:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: saturate(1.04);
}

.secondary-button:disabled {
  opacity: 0.45;
  cursor: default;
}

.start-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.player-panel {
  margin-top: 8px;
  padding: 18px 16px;
  border-radius: 20px;
  background: rgba(10, 24, 44, 0.8);
  text-align: left;
  border: 1px solid rgba(52, 214, 255, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.player-header h2 {
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

.player-entry {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.player-entry .name-input {
  flex: 1 1 220px;
}

.player-current,
.player-record,
.result-player {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-weight: 600;
}

.player-list {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.player-chip {
  border: 1px solid rgba(52, 214, 255, 0.18);
  border-radius: 999px;
  background: rgba(14, 31, 56, 0.95);
  color: #d5e7ff;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}

.player-chip.active {
  background: linear-gradient(135deg, #20c9ff, #4fffb0);
  color: #04111d;
  border-color: transparent;
}

.player-chip.empty {
  cursor: default;
  opacity: 0.75;
}

.rank-panel {
  margin-top: 24px;
  padding: 18px 16px;
  border-radius: 20px;
  background: rgba(8, 21, 40, 0.8);
  text-align: left;
  border: 1px solid rgba(52, 214, 255, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.rank-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.rank-list {
  margin: 14px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  color: var(--ink-soft);
  font-weight: 600;
}

.rank-list li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.rank-list li span:last-child {
  white-space: nowrap;
}

.rank-meta {
  margin-left: auto;
}

.rank-delete-button {
  border: 0;
  border-radius: 999px;
  background: rgba(255, 107, 138, 0.14);
  color: #ffb2c3;
  padding: 6px 10px;
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
}

.rank-empty {
  color: var(--ink-soft);
  opacity: 0.8;
}

.rank-submit {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.name-input {
  min-width: min(240px, 100%);
  border: 1px solid rgba(52, 214, 255, 0.2);
  border-radius: 14px;
  padding: 12px 14px;
  font: inherit;
  background: rgba(10, 24, 44, 0.92);
  color: var(--ink);
}

.rank-save-message {
  min-height: 20px;
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-weight: 600;
}

.result-rank-panel {
  margin-top: 18px;
}

.topbar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.status-card {
  padding: 10px 8px;
  border-radius: var(--radius-lg);
  background: rgba(10, 24, 44, 0.84);
  box-shadow: var(--shadow);
  text-align: center;
  border: 1px solid rgba(52, 214, 255, 0.1);
  backdrop-filter: blur(10px);
}

.status-label {
  display: block;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

.status-value {
  display: block;
  margin-top: 4px;
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
}

.game-panel {
  position: relative;
  padding: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
  height: 100%;
  max-height: none;
}

.game-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 0%, rgba(87, 214, 255, 0.025) 46%, transparent 52%),
    linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.018) 50%, transparent 100%);
  pointer-events: none;
  animation: scanSweep 8s linear infinite;
}

.stage-banner {
  position: absolute;
  inset: 20px 20px auto;
  padding: 16px 18px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(7, 23, 43, 0.92), rgba(6, 16, 30, 0.94));
  color: #eafaff;
  font-family: "Do Hyeon", sans-serif;
  font-size: clamp(1.3rem, 3vw, 2rem);
  letter-spacing: 0.03em;
  text-align: center;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 2;
}

.stage-banner.visible {
  opacity: 1;
  transform: translateY(0);
}

.effects-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.particle {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.95), rgba(255, 196, 96, 0.85));
  animation: particleBurst 700ms ease-out forwards;
}

@keyframes particleBurst {
  0% {
    opacity: 1;
    transform: translate(0, 0) scale(1);
  }

  100% {
    opacity: 0;
    transform: translate(var(--move-x), var(--move-y)) scale(0.3);
  }
}

.timer-block {
  padding: 8px 10px 7px;
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
  border: 1px solid rgba(52, 214, 255, 0.14);
  flex-shrink: 0;
}

.timer-copy {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.timer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.timer-label {
  margin: 0;
  color: var(--ink-soft);
  font-weight: 600;
}

#time-label {
  font-size: clamp(1.05rem, 2.5vw, 1.5rem);
  color: var(--accent-dark);
}

.audio-toggle-button {
  border: 1px solid rgba(135, 245, 255, 0.22);
  border-radius: 999px;
  background: rgba(12, 28, 50, 0.92);
  color: var(--accent-dark);
  padding: 6px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
}

.audio-toggle-button.muted {
  opacity: 0.72;
  color: var(--ink-soft);
}

.audio-toggle-button:hover {
  transform: translateY(-1px);
  filter: saturate(1.06);
}

.audio-track-select {
  border: 1px solid rgba(135, 245, 255, 0.22);
  border-radius: 999px;
  background: rgba(12, 28, 50, 0.92);
  color: var(--ink);
  padding: 6px 10px;
  font-size: 0.78rem;
  font-weight: 700;
}

.timer-track {
  margin-top: 8px;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(52, 214, 255, 0.12);
}

.timer-fill {
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #29d8ff, #72f1b8);
  transition: width 0.1s linear, background 0.2s ease;
}

.prompt-box {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.prompt-box p,
.feedback-message,
.result-score {
  margin: 0;
}

.sequence-wrap {
  position: relative;
  margin-top: 0;
  flex: 1 1 auto;
  min-height: 0;
  max-height: none;
  overflow: hidden;
  padding: 12px 8px 10px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(9, 23, 44, 0.96), rgba(6, 16, 30, 0.94)),
    repeating-linear-gradient(
      0deg,
      rgba(95, 171, 255, 0.05) 0,
      rgba(95, 171, 255, 0.05) 1px,
      transparent 1px,
      transparent 32px
    );
  border: 1px solid rgba(52, 214, 255, 0.14);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 14px 30px rgba(0, 0, 0, 0.22);
  display: flex;
  align-items: flex-start;
}

.sequence-wrap::before {
  content: "";
  position: absolute;
  inset: 8% 12%;
  border-radius: 50%;
  border: 1px solid rgba(87, 214, 255, 0.06);
  transform: perspective(900px) rotateX(75deg);
  pointer-events: none;
}

.grid-board {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(var(--board-columns, 7), minmax(0, 1fr));
  gap: var(--board-gap, 8px);
  font-family: "Gaegu", cursive;
  font-size: var(--board-font-size, clamp(1.15rem, 2.8vw, 1.8rem));
  line-height: 1;
  align-content: start;
  padding-top: 2px;
  padding-bottom: 2px;
}

.number-tile {
  min-height: var(--board-tile-height, 42px);
  padding: var(--board-tile-padding-y, 8px) 4px;
  border-radius: var(--board-tile-radius, 12px);
  background:
    linear-gradient(180deg, rgba(18, 40, 72, 0.92), rgba(9, 18, 34, 0.98));
  border: 1px solid rgba(52, 214, 255, 0.14);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 8px 18px rgba(0, 0, 0, 0.22),
    0 0 18px rgba(87, 214, 255, 0.04);
  text-align: center;
  color: #eff8ff;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(-2deg);
  text-shadow: 0 0 12px rgba(135, 245, 255, 0.24);
}

.number-tile:nth-child(3n) {
  transform: rotate(1.8deg);
}

.number-tile:nth-child(4n) {
  transform: rotate(-1.3deg);
}

.grid-board.compact-board .number-tile {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 4px 10px rgba(0, 0, 0, 0.18);
}

.grid-board.compact-board .number-tile:nth-child(3n),
.grid-board.compact-board .number-tile:nth-child(4n) {
  transform: rotate(-0.8deg);
}

.grid-board.ultra-board .number-tile {
  padding-left: 2px;
  padding-right: 2px;
  border-width: 1px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.03),
    0 2px 6px rgba(0, 0, 0, 0.16);
  text-shadow: none;
}

.grid-board.ultra-board .number-tile,
.grid-board.ultra-board .number-tile:nth-child(3n),
.grid-board.ultra-board .number-tile:nth-child(4n) {
  transform: none;
}

.grid-board.reverse-mode .number-tile {
  background:
    linear-gradient(180deg, rgba(64, 45, 106, 0.94), rgba(19, 18, 53, 0.98));
  border-color: rgba(173, 151, 255, 0.28);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 8px 18px rgba(40, 24, 90, 0.28),
    0 0 20px rgba(136, 112, 255, 0.08);
}

.grid-board.jackpot-mode .number-tile {
  background:
    linear-gradient(180deg, rgba(98, 67, 22, 0.96), rgba(48, 28, 10, 0.98));
  border-color: rgba(255, 212, 117, 0.32);
  box-shadow:
    inset 0 1px 0 rgba(255, 248, 217, 0.08),
    0 8px 18px rgba(80, 48, 0, 0.24),
    0 0 22px rgba(255, 196, 74, 0.14);
}

.grid-board.treasure-mode .number-tile {
  background:
    linear-gradient(180deg, rgba(18, 82, 72, 0.96), rgba(7, 32, 36, 0.98));
  border-color: rgba(114, 241, 184, 0.28);
  box-shadow:
    inset 0 1px 0 rgba(218, 255, 239, 0.08),
    0 8px 18px rgba(0, 58, 52, 0.24),
    0 0 22px rgba(114, 241, 184, 0.12);
}

.feedback-message {
  min-height: 18px;
  margin-top: 0;
  text-align: center;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
  flex-shrink: 0;
}

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

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

.bonus-row {
  margin-top: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex-shrink: 0;
}

.bonus-chip {
  padding: 6px 8px;
  border-radius: 999px;
  background: rgba(11, 27, 48, 0.9);
  border: 1px solid rgba(52, 214, 255, 0.14);
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 0.78rem;
}

.bonus-chip.muted {
  color: var(--ink-soft);
}

.bonus-chip.fever {
  background: linear-gradient(135deg, rgba(52, 214, 255, 0.92), rgba(114, 241, 184, 0.92));
  color: #04111d;
  border-color: rgba(114, 241, 184, 0.28);
}

.bonus-chip.achievement {
  background: linear-gradient(135deg, rgba(255, 191, 102, 0.9), rgba(255, 140, 66, 0.88));
  color: #2a1703;
  border-color: rgba(43, 147, 72, 0.22);
}

.action-row {
  margin-top: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  flex-shrink: 0;
}

.tool-button {
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #5bdcff, #58e9d6);
  color: #04111d;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(30, 180, 255, 0.18);
  transition: transform 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
}

.tool-button:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: saturate(1.05);
}

.tool-button:disabled {
  opacity: 0.45;
  cursor: default;
}

.tool-copy {
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 0.78rem;
}

.game-panel.combo-active {
  box-shadow:
    var(--shadow),
    0 0 0 3px rgba(255, 122, 0, 0.16),
    0 0 32px rgba(255, 122, 0, 0.16);
}

.game-panel.fever {
  box-shadow:
    var(--shadow),
    0 0 0 4px rgba(255, 210, 92, 0.22),
    0 0 42px rgba(255, 196, 74, 0.28);
}

.game-panel.shake {
  animation: panelShake 220ms ease-in-out;
}

@keyframes panelShake {
  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-8px);
  }

  50% {
    transform: translateX(6px);
  }

  75% {
    transform: translateX(-4px);
  }
}

.choices {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  position: relative;
  z-index: 3;
  flex-shrink: 0;
}

.choice-button {
  border: 0;
  border-radius: 18px;
  min-height: 42px;
  background:
    linear-gradient(180deg, rgba(36, 69, 118, 0.98), rgba(14, 28, 52, 0.98));
  color: #f8fcff;
  font-family: "Do Hyeon", sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  cursor: pointer;
  box-shadow:
    0 10px 20px rgba(0, 0, 0, 0.22),
    0 0 18px rgba(87, 214, 255, 0.08);
  border: 1px solid rgba(135, 245, 255, 0.26);
  transition: transform 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
}

@keyframes starDrift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 0.7;
  }

  100% {
    transform: translate3d(0, -10px, 0) scale(1.03);
    opacity: 1;
  }
}

@keyframes nebulaPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.72;
  }

  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@keyframes orbitFloat {
  0%,
  100% {
    transform: perspective(1200px) rotateX(72deg) translateY(0);
    opacity: 0.5;
  }

  50% {
    transform: perspective(1200px) rotateX(72deg) translateY(10px);
    opacity: 0.8;
  }
}

@keyframes scanSweep {
  0% {
    transform: translateY(-100%);
  }

  100% {
    transform: translateY(100%);
  }
}

.choice-button:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: saturate(1.06);
}

.choice-button:active:not(:disabled) {
  transform: translateY(0);
}

.choice-button:disabled {
  opacity: 0.6;
  cursor: default;
}

.choice-button.removed {
  opacity: 0.24;
  transform: scale(0.96);
  filter: grayscale(1);
}

.result-score {
  margin-top: 24px;
  display: grid;
  gap: 8px;
}

.result-meta {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-weight: 600;
}

.result-score span {
  color: var(--ink-soft);
  font-weight: 600;
}

.result-score strong {
  font-family: "Do Hyeon", sans-serif;
  font-size: clamp(2.5rem, 6vw, 4rem);
  color: var(--accent-dark);
}

@media (max-width: 720px) {
  #game-screen.screen-active {
    gap: 6px;
    height: calc(100vh - 12px);
    height: calc(100dvh - 12px);
    max-height: calc(100vh - 12px);
    max-height: calc(100dvh - 12px);
  }

  .app-shell {
    width: min(100% - 20px, 980px);
    padding: 6px 0;
  }

  .hero-panel,
  .result-panel,
  .game-panel {
    padding: 7px 6px;
  }

  h1 {
    font-size: clamp(2rem, 7vw, 3rem);
  }

  h2 {
    font-size: clamp(1.7rem, 6vw, 2.4rem);
  }

  .hero-copy,
  .result-summary {
    margin-top: 8px;
  }

  .guide-panel {
    margin-top: 16px;
    padding: 16px;
  }

  .guide-grid {
    gap: 10px;
  }

  .guide-card {
    min-height: 118px;
    padding: 14px;
    border-radius: 16px;
  }

  .guide-card h3 {
    margin: 10px 0 6px;
    font-size: 0.98rem;
  }

  .guide-card p {
    font-size: 0.84rem;
    line-height: 1.45;
  }

  .rule-strip {
    margin: 16px 0 18px;
    gap: 8px;
  }

  .rank-panel {
    margin-top: 16px;
    padding: 12px;
  }

  .player-panel {
    padding: 12px;
  }

  .rank-list {
    gap: 6px;
    font-size: 0.88rem;
  }

  .secondary-button {
    min-width: 130px;
    padding: 10px 14px;
    font-size: 0.88rem;
  }

  .name-input {
    min-width: 170px;
    padding: 10px 12px;
  }

  .topbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
    margin-bottom: 0;
  }

  .status-card {
    padding: 6px 5px;
    border-radius: 12px;
  }

  .status-label {
    font-size: 0.68rem;
  }

  .status-value {
    margin-top: 2px;
    font-size: clamp(0.92rem, 3.3vw, 1.14rem);
  }

  .stage-banner {
    inset: 12px 12px auto;
    padding: 7px 9px;
    font-size: clamp(0.92rem, 3.6vw, 1.2rem);
  }

  .timer-block,
  .prompt-box,
  .sequence-wrap {
    margin-top: 0;
  }

  .timer-block,
  .prompt-box {
    padding: 6px 7px;
    border-radius: 16px;
  }

  .timer-copy {
    align-items: flex-start;
  }

  .timer-track {
    margin-top: 4px;
    height: 7px;
  }

  .audio-toggle-button {
    padding: 4px 7px;
    font-size: 0.68rem;
  }

  .audio-track-select {
    padding: 4px 7px;
    font-size: 0.68rem;
  }

  .timer-actions {
    gap: 5px;
  }

  .timer-label {
    font-size: 0.82rem;
  }

  #time-label {
    font-size: clamp(0.96rem, 3.4vw, 1.16rem);
  }

  .grid-board {
    font-size: var(--board-font-size, clamp(1rem, 3.8vw, 1.35rem));
  }

  .number-tile {
    min-height: var(--board-tile-height, 32px);
    padding: var(--board-tile-padding-y, 4px) 2px;
    border-radius: 10px;
  }

  .number-tile,
  .number-tile:nth-child(3n),
  .number-tile:nth-child(4n) {
    transform: none;
  }

  .feedback-message,
  .bonus-row,
  .action-row {
    display: none;
  }

  .bonus-chip,
  .tool-copy {
    font-size: 0.72rem;
  }

  .bonus-chip {
    padding: 5px 7px;
  }

  .tool-button {
    padding: 7px 10px;
    font-size: 0.76rem;
  }

  .choices {
    margin-top: 0;
    gap: 5px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sequence-wrap {
    flex: 1 1 auto;
    padding: 10px 5px 8px;
  }

  .choice-button {
    min-height: 36px;
    font-size: clamp(0.88rem, 3.4vw, 1rem);
  }
}

@media (max-width: 480px) {
  .app-shell {
    width: min(100% - 12px, 980px);
    padding: 2px 0;
  }

  .topbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
  }

  .hero-panel,
  .result-panel,
  .game-panel {
    padding: 7px 6px;
    border-radius: 18px;
  }

  .hero-copy,
  .result-summary {
    font-size: 0.92rem;
    line-height: 1.5;
  }

  .guide-panel {
    padding: 14px;
    border-radius: 20px;
  }

  .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .guide-card {
    min-height: 108px;
    padding: 12px;
  }

  .guide-step {
    min-width: 38px;
    height: 24px;
    font-size: 0.7rem;
  }

  .guide-card h3 {
    font-size: 0.88rem;
  }

  .guide-card p {
    font-size: 0.76rem;
    line-height: 1.38;
  }

  .rule-strip {
    gap: 8px;
    margin: 18px 0 20px;
  }

  .rule-strip {
    justify-content: stretch;
  }

  .rule-strip span {
    width: 100%;
    padding: 8px 12px;
    font-size: 0.82rem;
  }

  .start-actions,
  .rank-submit,
  .player-entry {
    flex-direction: column;
  }

  .secondary-button,
  .name-input {
    width: 100%;
  }

  .rank-panel {
    margin-top: 12px;
    padding: 10px;
  }

  .rank-header .eyebrow {
    margin-bottom: 4px;
    font-size: 0.64rem;
  }

  .rank-list {
    margin-top: 8px;
    gap: 4px;
    padding-left: 18px;
    font-size: 0.8rem;
  }

  .rank-list li {
    flex-wrap: wrap;
  }

  .rank-meta {
    margin-left: 0;
  }

  #game-screen.screen-active {
    gap: 4px;
    height: 100dvh;
    max-height: 100dvh;
  }

  .status-card {
    padding: 5px 4px;
    border-radius: 10px;
  }

  .status-label {
    font-size: 0.62rem;
  }

  .status-value {
    font-size: clamp(0.86rem, 3.8vw, 1.02rem);
  }

  .timer-copy {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 4px 8px;
  }

  .timer-actions {
    grid-column: 1 / -1;
    justify-content: space-between;
    gap: 4px;
  }

  .timer-label {
    font-size: 0.76rem;
  }

  #time-label {
    font-size: 0.92rem;
  }

  .audio-track-select {
    min-width: 0;
    flex: 1 1 110px;
  }

  .audio-toggle-button {
    flex: 0 0 auto;
    min-width: 0;
  }

  .sequence-wrap {
    padding: 8px 4px 6px;
  }

  .grid-board {
    font-size: var(--board-font-size, clamp(0.92rem, 4.2vw, 1.2rem));
  }

  .number-tile {
    min-height: var(--board-tile-height, 28px);
  }

  .number-tile,
  .number-tile:nth-child(3n),
  .number-tile:nth-child(4n) {
    transform: none;
  }

  .choice-button {
    min-height: 34px;
    border-radius: 12px;
    font-size: 0.94rem;
  }

  .result-meta {
    font-size: 0.84rem;
  }
}

@media (max-height: 820px) and (max-width: 720px) {
  .hero-panel,
  .result-panel {
    gap: 8px;
  }

  .hero-copy,
  .result-summary {
    margin-top: 4px;
    font-size: 0.88rem;
    line-height: 1.4;
  }

  .guide-panel {
    margin-top: 12px;
    padding: 12px;
  }

  .guide-card {
    min-height: 102px;
    padding: 11px;
  }

  .guide-card p {
    font-size: 0.74rem;
  }

  .rule-strip {
    margin: 12px 0 14px;
  }

  .rule-strip span {
    padding: 7px 10px;
    font-size: 0.78rem;
  }

  .rank-panel {
    margin-top: 10px;
    padding: 10px;
  }

  .player-panel {
    padding: 10px;
  }

  .rank-list {
    margin-top: 8px;
    gap: 4px;
    font-size: 0.8rem;
  }

  .bonus-row,
  .action-row {
    margin-top: 4px;
  }

  .choices {
    margin-top: 6px;
  }

  .sequence-wrap {
    flex: 1 1 auto;
  }
}

@media (max-height: 760px) {
  #game-screen.screen-active {
    gap: 4px;
  }

  .topbar {
    gap: 6px;
    margin-bottom: 0;
  }

  .status-card {
    padding: 7px 6px;
  }

  .status-label {
    font-size: 0.72rem;
  }

  .status-value {
    font-size: clamp(0.95rem, 2.8vw, 1.15rem);
  }

  .timer-block {
    padding: 6px 8px 6px;
  }

  .feedback-message {
    display: none;
  }

  .bonus-row {
    display: none;
  }

  .action-row {
    display: none;
  }

  .choices {
    margin-top: 4px;
    gap: 5px;
  }

  .choice-button {
    min-height: 34px;
  }
}

@media (max-height: 700px) and (max-width: 480px) {
  .hero-copy,
  .result-summary,
  .feedback-message,
  .bonus-row {
    display: none;
  }

  .rule-strip span:nth-child(4),
  .rule-strip span:nth-child(5) {
    display: none;
  }

  .action-row {
    display: none;
  }

}