:root {
  color-scheme: light;
  --font-family-base: "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  --color-bg: #0f172a;
  --color-text: #f8fafc;
  --color-subtle: #cbd5f5;
  --color-panel: rgba(15, 23, 42, 0.6);
  --color-card: rgba(15, 23, 42, 0.85);
  --border-radius-lg: 24px;
  --border-radius-sm: 12px;
  --header-height: 15vh;
  --main-height: 55vh;
  --footer-height: 30vh;
  --transition-fast: 180ms ease-out;
  --transition-medium: 300ms ease-out;
  --elimination-duration: 0.6s;
  --elimination-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --elimination-scale-end: 0.35;
  --elimination-blur: 2px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(circle at center, #1e293b 0%, #020617 100%);
  color: var(--color-text);
  font-family: var(--font-family-base);
  font-size: 16px;
  line-height: 1.5;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px;
}

body.is-sudden-death {
  background: radial-gradient(circle at center, #3b0d0c 0%, #0f172a 65%, #020617 100%);
}

.is-sudden-death .layout-header,
.is-sudden-death .layout-main,
.is-sudden-death .history-panel .panel-content {
  background: rgba(63, 15, 24, 0.7);
  border-color: rgba(252, 165, 165, 0.4);
}

.mode-button-grid.is-sudden-death .action-button {
  background: rgba(220, 38, 38, 0.15);
  border-color: rgba(252, 165, 165, 0.35);
}

.mode-button-grid.is-sudden-death .action-button.is-active {
  background: rgba(248, 113, 113, 0.45);
  border-color: rgba(248, 113, 113, 0.8);
  box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.6);
}

.layout-root {

  width: min(1200px, 100%);

  height: calc(100vh - 48px); /* Account for body padding */

  display: grid;

  grid-template-columns: 4fr 1.2fr;

  grid-template-rows: 1fr;

  gap: 16px;

}



.layout-left, .layout-right {



  min-height: 0; /* Prevents content from expanding the container */



  display: flex;



  flex-direction: column;



}







.layout-left {



  gap: 16px;



}

.layout-header,
.layout-main,
.layout-footer {
  backdrop-filter: blur(16px);
  background: var(--color-panel);
  border-radius: var(--border-radius-lg);
  padding: 16px 24px;
}

.layout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.control-slot[data-slot="input"] {
  flex: 2;
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-slot[data-slot="actions"] {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.mode-button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
  width: 100%;
  align-items: start;
}

.mode-button-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mode-button-heading {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(226, 232, 240, 0.75);
  text-align: center;
}

.mode-button-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mode-button-stack .action-button {
  width: 100%;
  min-width: 0;
}

.field-label {
  font-size: 0.95rem;
  color: var(--color-text);
  text-shadow: 0 4px 18px rgba(2, 6, 23, 0.8);
  white-space: nowrap;
}

.input-wrapper {
  flex: 1;
  display: flex;
}

.input-wrapper input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.3);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.input-wrapper input:focus {
  outline: none;
  border-color: #7dd3fc;
}

.action-button {
  flex: 1;
  min-width: 140px;
  padding: 10px 18px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(248, 250, 252, 0.25);
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.action-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.action-button.is-active {
  background: rgba(16, 185, 129, 0.35);
  border-color: rgba(16, 185, 129, 0.55);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.35);
}

.action-button:not(:disabled):hover {
  background: rgba(59, 130, 246, 0.35);
  transform: translateY(-1px);
}

#sudden-death-notice {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(12px);
  z-index: 1200;
  transition: opacity var(--transition-medium);
}

#sudden-death-notice[hidden] {
  display: none !important;
}

.sudden-death-notice__card {
  width: min(420px, 90vw);
  padding: 28px 32px;
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.35), rgba(14, 165, 233, 0.35));
  border: 1px solid rgba(148, 197, 255, 0.5);
  box-shadow: 0 24px 48px rgba(2, 6, 23, 0.6);
  text-align: center;
  color: var(--color-text);
}

.sudden-death-notice__title {
  margin: 0 0 8px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.sudden-death-notice__message {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-subtle);
}

.layout-main {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  min-height: 0; /* Prevents flexbox overflow issues */
  position: relative;
  background: var(--color-panel);
  border-radius: var(--border-radius-lg);
  padding: 16px 24px;
}

.arena {
  flex-grow: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.arena-circle {
  height: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 2px dashed rgba(148, 163, 184, 0.4);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.is-sudden-death .arena-circle {
  border-color: rgba(248, 113, 113, 0.5);
}



#countdown-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-subtle);
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

#countdown-indicator.is-visible {
  opacity: 1;
}

.is-sudden-death #countdown-indicator {
  color: #fca5a5;
  text-shadow: 0 4px 18px rgba(248, 113, 113, 0.45);
}

.countdown-overlay--visible {
  opacity: 1;
}

#participant-ring, #choice-ring {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 1;
}

.participant-node {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
    translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)));
  transform-origin: center;
  text-align: center;
  color: var(--color-text);
  min-width: clamp(72px, 8vw, 120px);
  pointer-events: none;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  opacity: 0;
  filter: none;
  will-change: transform, opacity, filter;
}

.participant-name {
  display: block;
  font-size: 2.1rem;
  font-weight: 600;
}

.participant-node.is-visible {
  opacity: 1;
}

.participant-node.is-eliminating {
  pointer-events: none;
  z-index: 6;
  animation: elimination-disappear var(--elimination-duration) var(--elimination-ease)
    forwards;
}

.participant-node.is-eliminating::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
}

.participant-node.is-eliminating--loser {
  filter: drop-shadow(0 0 14px rgba(248, 113, 113, 0.65));
  animation-name: elimination-arc-down;
}

.participant-node.is-eliminating--loser::after {
  background: linear-gradient(
    to bottom,
    rgba(248, 113, 113, 0.45),
    rgba(248, 113, 113, 0)
  );
  animation: loser-trail var(--elimination-duration) linear forwards;
}

.participant-node.is-eliminating--winner {
  filter: drop-shadow(0 0 18px rgba(250, 204, 21, 0.75));
  animation-name: elimination-arc-up;
}

.participant-node.is-eliminating--winner::after {
  background: radial-gradient(circle at center, rgba(250, 204, 21, 0.6), transparent);
  animation: winner-glint calc(var(--elimination-duration) * 0.9) ease-out forwards;
}

@keyframes elimination-disappear {
  0% {
    opacity: 1;
    filter: blur(0);
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      scale(1);
  }
  60% {
    opacity: 0.45;
    filter: blur(calc(var(--elimination-blur) / 2));
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      scale(0.65);
  }
  100% {
    opacity: 0;
    filter: blur(var(--elimination-blur));
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      scale(var(--elimination-scale-end));
  }
}

@keyframes elimination-arc-down {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(0, 0) rotate(-2deg) scale(1);
  }
  20% {
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(12px, -6px) rotate(-8deg) scale(1);
  }
  40% {
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(24px, 16px) rotate(-4deg) scale(0.9);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(40px, 120px) rotate(-18deg) scale(0.35);
  }
}

@keyframes loser-trail {
  0% {
    opacity: 0.7;
    transform: scale(1) translateY(0);
  }
  100% {
    opacity: 0;
    transform: scale(0.6) translateY(80px);
  }
}

@keyframes elimination-arc-up {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(0, 0) rotate(2deg) scale(1);
  }
  30% {
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(-10px, -24px) rotate(8deg) scale(1.08);
  }
  60% {
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(-18px, -60px) rotate(12deg) scale(1.12);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
      translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)))
      translate(-32px, -140px) rotate(18deg) scale(0.9);
  }
}

@keyframes winner-glint {
  0% {
    opacity: 0.8;
    transform: scale(0.6);
  }
  100% {
    opacity: 0;
    transform: scale(1.2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .participant-node {
    transition: none;
  }

  .participant-node.is-eliminating {
    animation: none !important;
    opacity: 0;
    filter: none;
  }
}

.choice-node-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(var(--angle, 0deg))
    translateY(calc(-1 * var(--radius-px, 150px))) rotate(calc(-1 * var(--angle, 0deg)));
  transform-origin: center;
}

.choice-node {
  text-align: center;
  font-size: 3.15rem;
  pointer-events: none;
  opacity: 0;
}

.choice-node.is-visible {
  animation: choice-pop var(--transition-medium) forwards;
}

@keyframes choice-pop {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  60% {
    transform: scale(1.25);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}



.panel-title {
  margin: 0 0 12px;
  font-size: 1.25rem;
  font-weight: 600;
}

.panel-content {
  height: auto;
}

.history-panel .panel-content {
  flex-grow: 1;
  min-height: 0;
  padding: 12px;
  background: var(--color-card);
  border-radius: var(--border-radius-sm);
  overflow-y: auto;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.waiting-panel {
  flex-shrink: 0;
  flex-basis: 12%;
  padding: 12px 16px;
  background: rgba(15, 23, 42, 0.5);
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
  color: var(--color-subtle);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
  overflow: hidden;
  white-space: normal;
}

.panel-line {
  margin: 0;
  font-size: 0.9rem;
}

.panel-line--locked {
  font-weight: 700;
  color: #f1f5f9;
}

.waiting-panel .placeholder {
  margin: 0;
  width: 100%;
  text-align: center;
}

.history-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}



.history-card {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: var(--border-radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  animation: fade-in var(--transition-fast);
}

.history-card--sudden-death {
  border-color: rgba(248, 113, 113, 0.75);
  box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.5);
  background: rgba(63, 15, 24, 0.65);
}

.history-card__header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-bottom: 6px;
}

.history-card__meta {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--color-subtle);
}

.history-card__round {
  font-weight: 600;
}

.history-card__probability {
  color: #fbbf24;
  font-weight: 600;
}

.history-card__header .survivor-meta {
  font-size: 0.8rem;
  color: rgba(226, 232, 240, 0.75);
}

.history-card__body {
  display: grid;
  gap: 4px;
  font-size: 0.95rem;
}

.history-card__row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.history-card__row span:first-child {
  flex-grow: 1;
}

.history-card__outcome {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-subtle);
}

.history-card--winner .history-card__outcome {
  color: #fbbf24;
}

.history-card--loser .history-card__outcome {
  color: #34d399;
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

.placeholder {
  margin: 0;
  color: rgba(248, 250, 252, 0.6);
  font-size: 0.95rem;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.final-popup {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.8);
  display: grid;
  place-items: center;
  z-index: 50;
}

.final-popup[hidden] {
  display: none;
}

.final-popup__card {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(248, 250, 252, 0.2);
  border-radius: clamp(16px, 4vw, var(--border-radius-lg));
  padding: 32px 40px;
  text-align: center;
  min-width: 320px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  animation: fade-in var(--transition-fast);
}

.final-popup__mode {
  font-size: 1rem;
  color: var(--color-subtle);
  margin: 12px 0 8px;
}

.final-popup__name {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  margin: 0 0 20px;
}

@media (max-width: 1024px) {
  body {
    padding: 16px;
  }

  .layout-root {
    min-height: 640px;
    gap: 12px;
  }

  .layout-header,
  .layout-main,
  .layout-footer {
    padding: 16px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 20vh;
    --main-height: 50vh;
    --footer-height: 30vh;
  }

  .layout-root {
    min-height: 560px;
  }

  .layout-root {
    grid-template-columns: 1fr;
  }

  .layout-left, .layout-right {
    min-height: min-content;
  }

  .layout-main {
    height: 50vh;
  }

  .history-panel {
    height: 30vh;
  }

  .layout-header {
    flex-direction: column;
    align-items: stretch;
  }

  .control-slot[data-slot="actions"] {
    justify-content: stretch;
  }

  .mode-button-grid {
    grid-template-columns: 1fr;
  }

  .mode-button-heading {
    text-align: left;
  }

  .action-button {
    min-width: auto;
  }

  .final-popup__card {
    width: 90%;
    padding: 24px;
  }
}