.multiplayer-page {
  gap: 18px;
}

.multiplayer-auth-notice,
.boss-room-create,
.boss-room-join,
.boss-arena {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.multiplayer-auth-notice {
  display: grid;
  gap: 8px;
  justify-items: start;
}

.multiplayer-auth-notice span,
.boss-room-join span {
  color: var(--muted);
}

.boss-room-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.boss-room-form select,
.boss-room-form input,
.boss-room-join input {
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--control-bg);
  color: var(--text);
}

.boss-wide-field,
.boss-categories,
.boss-create-submit,
.boss-form-message {
  grid-column: 1 / -1;
}

.boss-code-input {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.boss-categories {
  margin: 0;
}

.boss-create-submit {
  justify-self: start;
}

.boss-room-list-head {
  margin-top: 24px;
}

.boss-room-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.boss-room-admin-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
}

.boss-room-admin-info {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.boss-room-admin-title {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.boss-room-code-badge,
.boss-room-status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.boss-room-code-badge {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  letter-spacing: 0.08em;
}

.boss-room-status.is-active {
  background: rgba(21, 128, 61, 0.14);
  color: var(--good);
}

.boss-room-status.is-defeated {
  background: rgba(147, 51, 234, 0.14);
  color: #9333ea;
}

.boss-room-status.is-expired,
.boss-room-status.is-closed {
  background: rgba(100, 116, 139, 0.14);
  color: var(--muted);
}

.boss-room-admin-info p,
.boss-room-admin-info span {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.boss-room-admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: flex-end;
}

.boss-room-admin-actions button {
  min-height: 36px;
  padding: 0 10px;
  font-size: 12px;
}

.boss-room-join {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
}

.boss-room-join > div {
  display: grid;
  gap: 4px;
}

.boss-room-join form {
  display: flex;
  gap: 8px;
}

.boss-room-join input {
  width: min(220px, 40vw);
  text-transform: uppercase;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.boss-room-join .login-message {
  grid-column: 1 / -1;
  margin: 0;
}

.boss-public-browser {
  grid-column: 1 / -1;
  gap: 10px !important;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.boss-public-head {
  margin: 0;
}

.boss-public-browser > input {
  width: 100%;
  max-width: none;
  text-transform: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: normal;
}

.boss-public-room-list {
  display: grid;
  gap: 10px;
}

.boss-public-room-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
}

.boss-public-room-card > button {
  min-height: 38px;
  white-space: nowrap;
}

.boss-arena {
  position: relative;
  overflow: hidden;
  padding: 0;
  background:
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 42%),
    var(--surface);
}

.boss-arena::after {
  position: absolute;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at center, transparent 24%, rgba(220, 38, 38, 0.2) 58%, rgba(127, 29, 29, 0.74) 100%);
  content: "";
  opacity: 0;
}

.boss-arena.is-player-hit {
  animation: playerHitShake 0.52s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

.boss-arena.is-player-hit::after {
  animation: playerHitFlash 0.52s ease-out;
}

.boss-arena-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}

.boss-arena-toolbar > div {
  display: grid;
  gap: 4px;
}

.boss-arena-toolbar span {
  color: var(--muted);
  font-size: 13px;
}

.boss-arena-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.boss-battle-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 320px);
  gap: 16px;
  padding: 16px;
}

.boss-main-column {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.boss-stage {
  position: relative;
  display: grid;
  min-height: 430px;
  place-items: center;
  padding: 24px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 36%, var(--line));
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(8, 15, 35, 0.28), rgba(2, 6, 23, 0.62)),
    radial-gradient(circle at 50% 38%, rgba(147, 51, 234, 0.26), transparent 38%),
    repeating-linear-gradient(90deg, transparent 0 42px, rgba(255, 255, 255, 0.025) 43px 44px);
  color: #f8fafc;
  isolation: isolate;
}

.boss-stage::before,
.boss-stage::after {
  position: absolute;
  z-index: -1;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(96, 165, 250, 0.16);
  border-radius: 50%;
  content: "";
  animation: bossRing 7s linear infinite;
}

.boss-stage::after {
  width: 340px;
  height: 340px;
  border-style: dashed;
  animation-direction: reverse;
  animation-duration: 11s;
}

.boss-stage-flare {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.13), transparent 22%),
    radial-gradient(circle at 80% 35%, rgba(236, 72, 153, 0.13), transparent 24%),
    linear-gradient(110deg, transparent 38%, rgba(255, 255, 255, 0.05) 48%, transparent 58%);
  background-size: auto, auto, 220% 100%;
  animation: bossSweep 4s ease-in-out infinite;
}

.boss-nameplate {
  position: absolute;
  z-index: 2;
  top: 18px;
  left: 18px;
  display: grid;
  gap: 2px;
}

.boss-nameplate span {
  color: #fb7185;
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.22em;
}

.boss-nameplate strong {
  font-size: clamp(20px, 4vw, 30px);
  text-shadow: 0 0 24px rgba(251, 113, 133, 0.45);
}

.boss-countdown[hidden] {
  display: none;
}

.boss-countdown {
  position: absolute;
  z-index: 12;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(2, 6, 23, 0.62);
  backdrop-filter: blur(5px);
}

.boss-countdown span {
  color: #fef08a;
  font-size: clamp(72px, 18vw, 150px);
  font-weight: 1000;
  line-height: 1;
  text-shadow:
    0 5px 0 #b91c1c,
    0 0 50px rgba(250, 204, 21, 0.8);
  animation: bossCountdownPulse 0.8s ease-in-out infinite alternate;
}

.boss-avatar {
  position: relative;
  z-index: 2;
  display: grid;
  width: clamp(150px, 24vw, 230px);
  height: clamp(150px, 24vw, 230px);
  place-items: center;
  border: 2px solid rgba(248, 250, 252, 0.25);
  border-radius: 42% 58% 48% 52%;
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 255, 255, 0.19), transparent 32%),
    linear-gradient(145deg, rgba(124, 58, 237, 0.88), rgba(30, 64, 175, 0.82));
  box-shadow:
    0 0 0 12px rgba(124, 58, 237, 0.08),
    0 0 70px rgba(124, 58, 237, 0.48),
    inset 0 -18px 38px rgba(2, 6, 23, 0.38);
  font-size: clamp(82px, 15vw, 150px);
  filter: drop-shadow(0 18px 18px rgba(0, 0, 0, 0.32));
  animation: bossFloat 2.7s ease-in-out infinite;
}

.boss-avatar.is-hit {
  animation: bossHit 0.48s ease;
}

.boss-avatar.is-taunting {
  animation: bossTaunt 0.55s ease;
}

.boss-stage.is-defeated .boss-avatar {
  animation: bossDefeated 1.1s ease both;
}

.boss-stage.is-defeated {
  background:
    radial-gradient(circle at 50% 40%, rgba(250, 204, 21, 0.38), transparent 40%),
    linear-gradient(135deg, rgba(21, 128, 61, 0.52), rgba(30, 64, 175, 0.52));
}

.boss-stage.is-phase-2 .boss-avatar {
  background:
    radial-gradient(circle at 50% 35%, rgba(255, 255, 255, 0.22), transparent 28%),
    linear-gradient(145deg, rgba(190, 24, 93, 0.92), rgba(91, 33, 182, 0.9));
  box-shadow: 0 0 80px rgba(219, 39, 119, 0.58), inset 0 -18px 38px rgba(2, 6, 23, 0.42);
}

.boss-stage.is-phase-3 .boss-avatar {
  border-color: rgba(251, 113, 133, 0.62);
  background:
    radial-gradient(circle at 50% 35%, rgba(254, 202, 202, 0.24), transparent 25%),
    linear-gradient(145deg, rgba(153, 27, 27, 0.96), rgba(15, 23, 42, 0.96));
  box-shadow: 0 0 95px rgba(220, 38, 38, 0.68), inset 0 -22px 45px rgba(0, 0, 0, 0.52);
}

.boss-stage.is-enraged {
  border-color: rgba(239, 68, 68, 0.74);
  box-shadow: inset 0 0 70px rgba(127, 29, 29, 0.28), 0 0 32px rgba(239, 68, 68, 0.26);
  animation: bossEnrageStage 0.34s ease-in-out infinite alternate;
}

.boss-stage.is-enraged .boss-avatar {
  filter: saturate(1.45) brightness(1.18) drop-shadow(0 0 28px rgba(239, 68, 68, 0.9));
  animation-duration: 1.25s;
}

.boss-stage.is-ultimate-strike {
  animation: ultimateStageFlash 0.9s ease;
}

.boss-stage.is-ultimate-strike .boss-avatar {
  animation: ultimateBossHit 0.9s ease;
}

.boss-damage-layer {
  position: absolute;
  z-index: 5;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.boss-damage-number {
  position: absolute;
  top: 33%;
  left: 50%;
  color: #fef08a;
  font-size: clamp(34px, 7vw, 64px);
  font-weight: 1000;
  letter-spacing: -0.04em;
  text-shadow:
    0 3px 0 #b91c1c,
    0 0 24px rgba(250, 204, 21, 0.9);
  transform: translate(-50%, -50%);
  animation: bossDamageNumber 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.boss-damage-number.is-ultimate {
  top: 42%;
  color: #e0f2fe;
  font-size: clamp(42px, 9vw, 82px);
  text-shadow:
    0 4px 0 #1d4ed8,
    0 0 18px #22d3ee,
    0 0 55px rgba(168, 85, 247, 0.95);
}

.boss-hit-particle {
  position: absolute;
  z-index: 4;
  top: 48%;
  left: 50%;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: #facc15;
  box-shadow: 0 0 12px #fb7185;
  animation: bossParticle 0.72s ease-out forwards;
}

.boss-taunt {
  position: absolute;
  z-index: 3;
  right: 18px;
  bottom: 142px;
  max-width: min(260px, 60%);
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px 12px 3px 12px;
  background: rgba(2, 6, 23, 0.72);
  color: #e2e8f0;
  font-size: 13px;
  font-weight: 800;
  text-align: center;
  backdrop-filter: blur(8px);
}

.boss-hp-panel {
  position: absolute;
  z-index: 3;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: grid;
  gap: 8px;
}

.boss-ultimate-panel {
  position: absolute;
  z-index: 3;
  right: 18px;
  bottom: 72px;
  left: 18px;
  display: grid;
  gap: 5px;
}

.boss-ultimate-panel > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: #bae6fd;
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.08em;
}

.boss-ultimate-track {
  height: 10px;
  overflow: hidden;
  border: 1px solid rgba(186, 230, 253, 0.38);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.72);
}

.boss-ultimate-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #0ea5e9, #8b5cf6 62%, #f0abfc);
  box-shadow: 0 0 18px rgba(139, 92, 246, 0.85);
  transition: width 0.42s ease;
}

.boss-hp-panel > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-variant-numeric: tabular-nums;
}

.boss-hp-panel span {
  color: #cbd5e1;
  font-size: 13px;
}

.boss-hp-track {
  height: 22px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.32);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.72);
  box-shadow: inset 0 2px 7px rgba(0, 0, 0, 0.48);
}

.boss-hp-track span {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background:
    linear-gradient(90deg, #dc2626, #f97316 58%, #facc15),
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(255, 255, 255, 0.2) 11px 18px);
  box-shadow: 0 0 18px rgba(249, 115, 22, 0.68);
  transition: width 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.boss-rules {
  position: absolute;
  z-index: 3;
  top: 18px;
  right: 18px;
  max-width: 45%;
  color: #cbd5e1;
  font-size: 12px;
  text-align: right;
}

.boss-question-zone,
.boss-leaderboard {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.boss-question-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.boss-question-list.is-batch {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.boss-question-card {
  display: grid;
  gap: 12px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-soft);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.boss-question-card.is-correct {
  border-color: rgba(21, 128, 61, 0.7);
  box-shadow: 0 0 0 3px rgba(21, 128, 61, 0.1);
}

.boss-question-card.is-wrong {
  border-color: rgba(185, 28, 28, 0.7);
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.1);
}

.boss-question-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.boss-question-meta {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.boss-question-timer {
  min-width: 62px;
  color: var(--accent);
  font-size: 17px;
  font-weight: 1000;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.boss-question-timer.is-danger {
  color: var(--bad);
  animation: timerDanger 0.7s ease-in-out infinite alternate;
}

.boss-question-text {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.6;
}

.boss-question-images {
  display: grid;
  gap: 8px;
}

.boss-question-images img {
  display: block;
  max-width: 100%;
  max-height: 360px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  object-fit: contain;
}

.boss-question-choices {
  display: grid;
  gap: 8px;
}

.boss-question-choice {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  width: 100%;
  min-height: 44px;
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--control-bg);
  color: var(--text);
  font-weight: 650;
  text-align: left;
}

.boss-question-choice:hover:not(:disabled) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 9%, var(--control-bg));
  transform: none;
}

.boss-question-choice.is-selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 15%, var(--control-bg));
}

.boss-question-choice.is-answer {
  border-color: rgba(21, 128, 61, 0.68);
  background: rgba(21, 128, 61, 0.1);
}

.boss-question-choice.is-wrong-choice {
  border-color: rgba(185, 28, 28, 0.68);
  background: rgba(185, 28, 28, 0.1);
}

.boss-question-choice:disabled {
  cursor: default;
  opacity: 0.88;
}

.boss-question-submit {
  justify-self: start;
  min-height: 38px;
}

.boss-question-result {
  min-height: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.boss-question-result.is-correct {
  color: var(--good);
}

.boss-question-result.is-wrong {
  color: var(--bad);
}

.boss-battle-message {
  min-height: 22px;
  margin: 12px 0 0;
  color: var(--muted);
  font-weight: 800;
}

.boss-leaderboard {
  align-self: start;
  position: sticky;
  top: 16px;
}

.boss-leaderboard-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.boss-player-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 9px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-soft);
}

.boss-player-rank {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--control-bg);
  color: var(--muted);
  font-size: 12px;
  font-weight: 1000;
}

.boss-player-row:nth-child(1) .boss-player-rank {
  background: #facc15;
  color: #713f12;
}

.boss-player-row:nth-child(2) .boss-player-rank {
  background: #cbd5e1;
  color: #334155;
}

.boss-player-row:nth-child(3) .boss-player-rank {
  background: #fb923c;
  color: #7c2d12;
}

.boss-player-info {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.boss-player-info b {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.boss-player-info span {
  color: var(--muted);
  font-size: 11px;
}

.boss-player-damage {
  color: var(--bad);
  font-size: 13px;
  font-weight: 1000;
  text-align: right;
}

.boss-player-online {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 4px;
  border-radius: 50%;
  background: #22c55e;
}

.boss-empty {
  padding: 24px 12px;
  color: var(--muted);
  text-align: center;
}

.boss-victory-screen[hidden] {
  display: none;
}

.boss-victory-screen {
  position: fixed;
  z-index: 9996;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background:
    radial-gradient(circle at center, rgba(250, 204, 21, 0.24), transparent 40%),
    rgba(2, 6, 23, 0.88);
  backdrop-filter: blur(10px);
  animation: victoryScreenIn 0.55s ease both;
}

.boss-victory-panel {
  display: grid;
  width: min(520px, 100%);
  justify-items: center;
  gap: 10px;
  padding: 34px 24px;
  border: 1px solid rgba(250, 204, 21, 0.55);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(30, 64, 175, 0.94), rgba(88, 28, 135, 0.96));
  color: #fff;
  box-shadow: 0 0 90px rgba(250, 204, 21, 0.28);
  text-align: center;
}

.boss-victory-icon {
  font-size: 88px;
  filter: drop-shadow(0 0 24px rgba(250, 204, 21, 0.74));
  animation: victoryIcon 1s ease-in-out infinite alternate;
}

.boss-victory-panel small {
  color: #fde68a;
  font-weight: 1000;
  letter-spacing: 0.24em;
}

.boss-victory-panel h2,
.boss-victory-panel p {
  margin: 0;
}

.boss-victory-panel h2 {
  font-size: clamp(30px, 7vw, 52px);
}

.boss-victory-panel p {
  color: #dbeafe;
}

@keyframes bossFloat {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-14px) rotate(1deg); }
}

@keyframes bossRing {
  to { transform: rotate(360deg); }
}

@keyframes bossSweep {
  0%, 100% { background-position: center, center, 0 0; }
  50% { background-position: center, center, 100% 0; }
}

@keyframes bossHit {
  0% { transform: translateX(0) scale(1); filter: brightness(1); }
  15% { transform: translateX(-18px) scale(1.08); filter: brightness(2.4); }
  32% { transform: translateX(15px) scale(0.94); }
  50% { transform: translateX(-11px) scale(1.04); }
  68% { transform: translateX(8px); }
  100% { transform: translateX(0) scale(1); filter: brightness(1); }
}

@keyframes bossDefeated {
  0% { transform: scale(1) rotate(0); opacity: 1; }
  45% { transform: scale(1.25) rotate(8deg); filter: brightness(3); }
  100% { transform: scale(0.2) rotate(35deg); opacity: 0; }
}

@keyframes bossDamageNumber {
  0% { opacity: 0; transform: translate(-50%, 10px) scale(0.55) rotate(-8deg); }
  28% { opacity: 1; transform: translate(-50%, -35px) scale(1.22) rotate(3deg); }
  100% { opacity: 0; transform: translate(-50%, -105px) scale(0.92) rotate(-2deg); }
}

@keyframes bossParticle {
  to {
    opacity: 0;
    transform: translate(var(--particle-x), var(--particle-y)) rotate(280deg) scale(0.2);
  }
}

@keyframes bossTaunt {
  0%, 100% { transform: translateX(0) rotate(0); }
  25% { transform: translateX(-8px) rotate(-3deg); }
  75% { transform: translateX(8px) rotate(3deg); }
}

@keyframes timerDanger {
  to { transform: scale(1.08); text-shadow: 0 0 12px rgba(220, 38, 38, 0.55); }
}

@keyframes bossCountdownPulse {
  from { opacity: 0.72; transform: scale(0.86); }
  to { opacity: 1; transform: scale(1.06); }
}

@keyframes bossEnrageStage {
  from { filter: brightness(1); }
  to { filter: brightness(1.16); }
}

@keyframes ultimateStageFlash {
  0%, 100% { filter: brightness(1); }
  20% { filter: brightness(2.8) saturate(1.8); }
  45% { filter: hue-rotate(55deg) brightness(1.9); }
  70% { filter: brightness(2.2); }
}

@keyframes ultimateBossHit {
  0% { transform: scale(1) rotate(0); }
  22% { transform: scale(1.35) rotate(-9deg); }
  48% { transform: scale(0.72) rotate(12deg); filter: brightness(3); }
  74% { transform: scale(1.18) rotate(-5deg); }
  100% { transform: scale(1) rotate(0); }
}

@keyframes victoryScreenIn {
  from { opacity: 0; transform: scale(1.08); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes victoryIcon {
  to { transform: translateY(-8px) rotate(4deg) scale(1.06); }
}

@keyframes playerHitShakeEnraged {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0); }
  8% { transform: translate3d(-22px, 9px, 0) rotate(-1.2deg); }
  18% { transform: translate3d(20px, -9px, 0) rotate(1deg); }
  30% { transform: translate3d(-17px, 7px, 0) rotate(-0.9deg); }
  44% { transform: translate3d(14px, -6px, 0) rotate(0.75deg); }
  60% { transform: translate3d(-11px, 5px, 0) rotate(-0.55deg); }
  76% { transform: translate3d(8px, -3px, 0) rotate(0.35deg); }
  90% { transform: translate3d(-4px, 2px, 0); }
}

.boss-arena.is-player-hit.is-enraged-hit {
  animation-name: playerHitShakeEnraged;
  animation-duration: 0.72s;
}

@keyframes playerHitShake {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0); }
  10% { transform: translate3d(-12px, 5px, 0) rotate(-0.7deg); }
  20% { transform: translate3d(11px, -5px, 0) rotate(0.6deg); }
  30% { transform: translate3d(-9px, 4px, 0) rotate(-0.5deg); }
  42% { transform: translate3d(8px, -3px, 0) rotate(0.4deg); }
  56% { transform: translate3d(-6px, 3px, 0) rotate(-0.3deg); }
  72% { transform: translate3d(5px, -2px, 0) rotate(0.2deg); }
  86% { transform: translate3d(-2px, 1px, 0); }
}

@keyframes playerHitFlash {
  0% { opacity: 0; }
  16% { opacity: 1; }
  100% { opacity: 0; }
}

@media (max-width: 900px) {
  .boss-room-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .boss-battle-grid {
    grid-template-columns: 1fr;
  }

  .boss-leaderboard {
    position: static;
  }
}

@media (max-width: 720px) {
  .boss-room-form,
  .boss-question-list.is-batch {
    grid-template-columns: 1fr;
  }

  .boss-room-admin-card,
  .boss-public-room-card,
  .boss-room-join {
    grid-template-columns: 1fr;
  }

  .boss-room-admin-actions {
    justify-content: flex-start;
  }

  .boss-room-join form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .boss-room-join input {
    width: 100%;
  }

  .boss-battle-grid {
    padding: 10px;
  }

  .boss-stage {
    min-height: 390px;
    padding: 18px;
  }

  .boss-rules {
    top: 64px;
    max-width: 58%;
  }

  .boss-taunt {
    right: 12px;
    bottom: 105px;
    max-width: 72%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .boss-stage::before,
  .boss-stage::after,
  .boss-stage-flare,
  .boss-avatar,
  .boss-question-timer.is-danger {
    animation: none;
  }

  .boss-arena.is-player-hit {
    animation: none;
  }

  .boss-arena.is-player-hit.is-enraged-hit {
    animation: none;
  }
}