:root {
  color-scheme: light;
  --bg: #f5f6fb;
  --panel: #ffffff;
  --panel-shadow: 0 24px 40px -28px rgba(25, 45, 90, 0.45);
  --accent: #ff6f8d;
  --accent-dark: #f04f70;
  --text: #1f2430;
  --text-muted: #5b6374;
  --border: rgba(40, 50, 80, 0.16);
  font-family: "M PLUS Rounded 1c", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-weight: 700;
  display: flex;
  justify-content: center;
  align-items: stretch;
  overflow-x: hidden;
  overflow-y: auto;
}

body.is-playing {
  overflow-x: hidden;
}

.app {
  position: relative;
  width: min(1100px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
}

.screen {
  position: absolute;
  inset: 0;
  padding: clamp(1rem, 2.5vw, 2.5rem);
  display: grid;
  gap: 1.5rem;
  overflow: hidden;
  transform: translateX(0);
  transition: transform 400ms cubic-bezier(0.6, 0, 0.2, 1);
}

.screen[aria-hidden="true"] {
  pointer-events: none;
}

.screen[hidden] {
  display: none;
}

.screen--start {
  grid-template-rows: 1fr auto;
  align-content: center;
  justify-items: center;
  text-align: center;
  padding-block: clamp(2rem, 6vh, 3.5rem);
}

.screen--difficulty {
  grid-template-rows: auto auto 1fr;
  gap: 0.9rem;
}

.difficulty-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.section-title {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  letter-spacing: 0.05em;
}

.section-subtitle {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}


.difficulty-selector {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  scrollbar-width: thin;
  align-items: stretch;
  -webkit-overflow-scrolling: touch;
}

.difficulty-selector::-webkit-scrollbar {
  height: 6px;
}

.difficulty-selector::-webkit-scrollbar-thumb {
  background: rgba(40, 50, 80, 0.2);
  border-radius: 999px;
}

.difficulty-chip {
  display: grid;
  gap: 0.35rem;
  padding: 0.75rem 1.1rem;
  border-radius: 18px;
  background: var(--panel);
  border: 2px solid rgba(40, 50, 80, 0.1);
  box-shadow: var(--panel-shadow);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  min-width: 180px;
  transition: transform 0.15s ease, border 0.2s ease, box-shadow 0.2s ease;
}

.difficulty-chip span {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0;
}

.difficulty-chip[aria-pressed="true"] {
  border-color: rgba(255, 111, 141, 0.65);
  box-shadow: 0 18px 34px -22px rgba(255, 111, 141, 0.6);
  transform: translateY(-4px);
}

.difficulty-chip:focus-visible {
  outline: 3px solid rgba(255, 111, 141, 0.35);
  outline-offset: 4px;
}


.puzzle-gallery {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  overflow: hidden;
}

.puzzle-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  justify-content: center;
  align-content: flex-start;
  flex: 1;
}

.puzzle-card {
  position: relative;
  display: grid;
  gap: 0.6rem;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid rgba(40, 50, 80, 0.12);
  box-shadow: var(--panel-shadow);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border 0.18s ease;
  min-width: 200px;
  min-height: 180px;
}

.puzzle-card--official {
  padding-top: 1.4rem;
}

.puzzle-card__badge {
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 111, 141, 0.2);
  border: 1px solid rgba(255, 111, 141, 0.55);
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.puzzle-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px -24px rgba(40, 50, 80, 0.45);
  border-color: rgba(255, 111, 141, 0.4);
}

.puzzle-card__actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.puzzle-card__thumb {
  aspect-ratio: 1;
  border-radius: 12px;
  display: grid;
  place-items: center;
  justify-self: center;
  width: 120px;
  background: repeating-linear-gradient(135deg, #fce4ed 0, #fce4ed 12px, #f9d3e0 12px, #f9d3e0 24px);
  color: rgba(120, 40, 70, 0.75);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.puzzle-card__thumb--image {
  width: 140px;
  background: rgba(20, 28, 40, 0.14);
  border: 1px solid rgba(40, 50, 80, 0.18);
}

.puzzle-card__thumb--image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: inherit;
  image-rendering: pixelated;
}

.puzzle-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.puzzle-card__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.puzzle-card__description {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.puzzle-card--official .puzzle-card__meta {
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.4rem;
}

.panel {
  max-width: 620px;
  padding: clamp(1.5rem, 3vw, 2.8rem);
  background: var(--panel);
  border-radius: 32px;
  box-shadow: var(--panel-shadow);
  display: grid;
  gap: 1.75rem;
}

.panel-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
}

.app-title {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 4rem);
  letter-spacing: 0.08em;
}

.tagline {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.description {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2.4rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:focus-visible {
  outline: 3px solid rgba(255, 111, 141, 0.35);
  outline-offset: 3px;
}

.button--compact {
  padding: 0.55rem 1.2rem;
  font-size: 0.92rem;
}

.button--primary {
  color: #fff;
  background: linear-gradient(130deg, #ff6f8d, #ff9ea0);
  box-shadow: 0 18px 30px -16px rgba(255, 111, 141, 0.6);
}

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

.button--ghost {
  color: var(--text);
  background: transparent;
  border-color: rgba(40, 50, 80, 0.18);
}

.button--ghost:hover {
  background: rgba(40, 50, 80, 0.06);
}

.puzzle-card__play {
  flex: 1;
  min-width: 90px;
}

.puzzle-card__share {
  flex: 1;
  min-width: 90px;
}

.button--outline {
  color: var(--accent);
  background: rgba(255, 111, 141, 0.08);
  border-color: rgba(255, 111, 141, 0.4);
}

.button--outline:hover {
  background: rgba(255, 111, 141, 0.16);
}

.button--wide {
  text-decoration: none;
  justify-content: center;
}

.start-footer {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.screen--game {
  grid-template-rows: auto auto 1fr;
  gap: 0.6rem;
  overflow: auto;
  overscroll-behavior: contain;
  transform: translateX(100%);
}

.game-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem 1.2rem;
}

.game-title {
  margin: 0;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  letter-spacing: 0.04em;
}

.game-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.game-metrics {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.game-layout {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: center;
  justify-items: center;
  height: 100%;
}

.stage {
  background: var(--panel);
  border-radius: 24px;
  padding: 0.2rem;
  box-shadow: var(--panel-shadow);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 0;
  width: 100%;
  height: 100%;
}

.canvas-frame {
  position: relative;
  aspect-ratio: 1;
  border-radius: 18px;
  border: 1px solid rgba(40, 50, 80, 0.12);
  background: repeating-linear-gradient(45deg, #f7f7fb 0, #f7f7fb 12px, #eff0f6 12px, #eff0f6 24px);
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  width: clamp(340px, 74vh, 940px);
  height: clamp(340px, 74vh, 940px);
  max-width: min(48vw, 940px);
  touch-action: none;
}

.spot-canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  transform-origin: center center;
  will-change: transform;
}

.canvas-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transform-origin: center center;
  will-change: transform;
}

.marker {
  position: absolute;
  border: 3px solid rgba(255, 111, 141, 0.85);
  border-radius: 999px;
  background: rgba(255, 111, 141, 0.22);
  pointer-events: none;
  transform-origin: center;
  animation: marker-burst 380ms cubic-bezier(0.25, 0.75, 0.35, 1.3) forwards;
}

.miss-marker {
  position: absolute;
  pointer-events: none;
  display: block;
  animation: miss-pop 220ms cubic-bezier(0.25, 0.8, 0.25, 1);
}

.miss-marker::before,
.miss-marker::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 3px;
  height: 100%;
  background: rgba(255, 111, 141, 0.95);
  border-radius: 999px;
  transform-origin: center;
  box-shadow: 0 0 12px rgba(255, 111, 141, 0.45);
}

.miss-marker::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.miss-marker::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.global-flash {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  animation: flash-fade 420ms ease forwards;
}

.global-flash__circle {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 6px solid rgba(255, 111, 141, 0.75);
  background: rgba(255, 111, 141, 0.18);
}

@keyframes marker-burst {
  0% {
    transform: scale(0.4);
    opacity: 0;
  }
  50% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0.85;
  }
}

@keyframes miss-pop {
  0% {
    transform: scale(0.6);
    opacity: 0;
  }
  60% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes flash-fade {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  25% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.1);
  }
}

.status-card {
  background: var(--panel);
  border-radius: 16px;
  box-shadow: 0 10px 22px -18px rgba(25, 45, 90, 0.45);
  padding: 0.45rem 0.65rem;
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.status-row {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.status-label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.status-value {
  font-size: 0.95rem;
  color: var(--text);
}

.hint-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 720px) {
  .panel {
    padding: 2rem 1.6rem;
  }

  .puzzle-card__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .difficulty-selector {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .game-layout {
    grid-template-columns: 1fr;
    gap: 0.4rem;
    height: auto;
    align-content: flex-start;
    justify-items: stretch;
  }

  .game-header {
    align-items: flex-start;
  }

  .stage {
    height: auto;
  }

  .canvas-frame {
    width: max(180px, min(82vw, calc((100vh - 14rem) / 2)));
    height: max(180px, min(82vw, calc((100vh - 14rem) / 2)));
    max-width: 100%;
  }

  .game-controls {
    flex-wrap: nowrap;
    gap: 0.35rem;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .game-controls::-webkit-scrollbar {
    display: none;
  }

  .game-controls .button {
    flex: 0 0 auto;
    white-space: nowrap;
  }
}

.app.is-playing .screen--start {
  transform: translateX(-100%);
}

.app.is-playing .screen--game {
  transform: translateX(0);
}

.puzzle-card--official {
  border: 1px solid rgba(255, 111, 141, 0.45);
}

.completion-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 420ms cubic-bezier(0.23, 1, 0.32, 1), transform 420ms cubic-bezier(0.23, 1, 0.32, 1);
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.18), rgba(12, 16, 28, 0.92));
  backdrop-filter: blur(2px);
  z-index: 999;
}

.completion-overlay.is-visible {
  opacity: 1;
  transform: scale(1);
}

.completion-overlay span {
  font-size: clamp(3rem, 11vw, 7rem);
  font-weight: 800;
  letter-spacing: 0.45em;
  color: rgba(255, 255, 255, 0.94);
  text-transform: uppercase;
  text-shadow:
    0 8px 24px rgba(0, 0, 0, 0.55),
    0 0 30px rgba(255, 111, 141, 0.48);
  animation: completion-flash 1.2s ease-out;
}

.completion-overlay--failure {
  background: radial-gradient(circle at center, rgba(255, 200, 200, 0.2), rgba(60, 0, 20, 0.9));
}

.completion-overlay--failure span {
  color: rgba(255, 134, 134, 0.96);
  text-shadow:
    0 8px 18px rgba(0, 0, 0, 0.6),
    0 0 30px rgba(255, 40, 70, 0.6);
}

@keyframes completion-flash {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }
  60% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}