:root {
  --bg-deep: #1a120c;
  --bg-mid: #3d2418;
  --bg-glow: #c45c26;
  --ink: #fff8f1;
  --ink-soft: rgba(255, 248, 241, 0.72);
  --panel: #2a1a12;
  --btn: #ff8a3d;
  --btn-ink: #1a120c;
  --shadow: rgba(10, 6, 3, 0.45);
  --font-brand: "Fredoka", "Noto Sans SC", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans SC", "Noto Sans JP", "Fredoka", sans-serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg-deep);
  overflow-x: hidden;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 55% at 50% -10%, rgba(255, 138, 61, 0.35), transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(232, 90, 58, 0.22), transparent 55%),
    radial-gradient(ellipse 45% 35% at 8% 70%, rgba(90, 160, 90, 0.18), transparent 50%),
    linear-gradient(165deg, var(--bg-mid) 0%, var(--bg-deep) 55%, #0f0a07 100%);
  pointer-events: none;
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.07;
  mix-blend-mode: overlay;
}

.stage {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: clamp(0.85rem, 2.5vh, 1.5rem);
  min-height: 100dvh;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
}

.brand {
  text-align: center;
}

.brand__name {
  margin: 0;
  font-family: var(--font-brand);
  font-size: clamp(3rem, 12vw, 5.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 0.95;
  text-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  animation: brand-in 0.7s ease-out both;
}

.brand__tagline {
  margin: 0.55rem 0 0;
  font-size: clamp(0.95rem, 2.8vw, 1.15rem);
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  animation: brand-in 0.7s ease-out 0.12s both;
}

.controls {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  width: min(100%, 420px);
  animation: brand-in 0.7s ease-out 0.18s both;
}

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 248, 241, 0.08);
  border: 1px solid rgba(255, 248, 241, 0.12);
}

.mode-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 0.75rem;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.mode-btn.is-active {
  background: rgba(255, 138, 61, 0.95);
  color: var(--btn-ink);
}

.mode-btn:focus-visible {
  outline: 2px solid #fff8f1;
  outline-offset: 2px;
}

.trials-field {
  display: grid;
  justify-items: center;
  gap: 0.35rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.trials-field[hidden] {
  display: none;
}

.trials-field__row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.trials-field__label {
  letter-spacing: 0.04em;
}

.trials-field__hint {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 248, 241, 0.45);
}

.trials-input {
  width: 5.5rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid rgba(255, 248, 241, 0.18);
  border-radius: 0.7rem;
  background: rgba(26, 18, 12, 0.55);
  color: var(--ink);
  font-family: var(--font-brand);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: center;
}

.trials-input:focus-visible {
  outline: 2px solid var(--btn);
  outline-offset: 2px;
}

.trials-input.is-invalid {
  border-color: #e85a3a;
  box-shadow: 0 0 0 2px rgba(232, 90, 58, 0.35);
}

.wheel-scene {
  position: relative;
  width: min(86vw, 420px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  animation: wheel-in 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

#wheel {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow:
    0 0 0 10px rgba(255, 248, 241, 0.08),
    0 0 0 14px rgba(255, 138, 61, 0.25),
    0 22px 50px var(--shadow);
  transition: filter 0.35s ease;
}

#wheel.is-highlight {
  filter: brightness(1.06) saturate(1.08);
}

.pointer {
  position: absolute;
  top: -6px;
  left: 50%;
  z-index: 3;
  width: 0;
  height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-top: 28px solid #fff8f1;
  transform: translateX(-50%);
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.35));
  animation: pointer-bob 2.4s ease-in-out infinite;
  transform-origin: 50% 0;
}

.pointer::after {
  content: "";
  position: absolute;
  top: -28px;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff8f1;
  transform: translateX(-50%);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.55);
}

.spin-btn {
  position: absolute;
  z-index: 4;
  width: clamp(72px, 22%, 92px);
  height: clamp(72px, 22%, 92px);
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffc08a, var(--btn) 55%, #e26520);
  color: var(--btn-ink);
  font-family: var(--font-brand);
  font-size: clamp(1.05rem, 3.5vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow:
    0 0 0 6px rgba(26, 18, 12, 0.55),
    0 8px 20px rgba(0, 0, 0, 0.35);
  transition: transform 0.18s ease, filter 0.18s ease;
}

.spin-btn:hover:not(:disabled) {
  transform: scale(1.05);
}

.spin-btn:active:not(:disabled) {
  transform: scale(0.96);
}

.spin-btn:disabled {
  cursor: not-allowed;
  filter: grayscale(0.2) brightness(0.9);
}

.spin-btn:focus-visible {
  outline: 3px solid #fff8f1;
  outline-offset: 4px;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 6, 3, 0.62);
  backdrop-filter: blur(4px);
  animation: fade-in 0.25s ease both;
}

.modal__panel {
  position: relative;
  z-index: 1;
  width: min(100%, 400px);
  max-height: min(92dvh, 760px);
  overflow: auto;
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
  background:
    linear-gradient(160deg, rgba(255, 138, 61, 0.18), transparent 45%),
    var(--panel);
  border: 1px solid rgba(255, 248, 241, 0.12);
  border-radius: 1.25rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  animation: pop-in 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.modal__eyebrow {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.modal__title {
  margin: 0.65rem 0 1.1rem;
  font-family: var(--font-brand);
  font-size: clamp(1.85rem, 7vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  word-break: break-word;
}

.stats {
  display: grid;
  justify-items: center;
  gap: 1rem;
  margin: 0 0 1.25rem;
}

.stats[hidden] {
  display: none;
}

#pie-chart {
  width: min(100%, 220px);
  height: auto;
}

.stats__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: grid;
  gap: 0.4rem;
  text-align: left;
}

.stats__legend li {
  display: grid;
  grid-template-columns: 12px 1fr auto auto;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

.stats__legend li.is-winner {
  color: var(--ink);
  font-weight: 700;
}

.stats__swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.stats__count,
.stats__pct {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.again-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.6rem;
  background: var(--btn);
  color: var(--btn-ink);
  font-family: var(--font-brand);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.again-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.again-btn:active {
  transform: translateY(0);
}

.again-btn:focus-visible {
  outline: 3px solid #fff8f1;
  outline-offset: 3px;
}

@keyframes brand-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes wheel-in {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(16px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes pointer-bob {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(3px);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand__name,
  .brand__tagline,
  .controls,
  .wheel-scene,
  .pointer,
  .modal__backdrop,
  .modal__panel {
    animation: none;
  }
}