*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f0f23;
  --surface: #1a1a2e;
  --accent: #e94560;
  --text: #eeeeee;
  --text-dim: #888888;
  --success: #4caf50;
  --hidden: #444444;
  --map-default: #2a2a4a;
  --map-active: #e94560;
  --map-stroke: #555577;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Hiragino Kaku Gothic Pro', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.screen {
  width: 100%;
  max-width: 640px;
  padding: 2rem 1.5rem;
  text-align: center;
}

#screen-game {
  max-width: 860px;
}

.hidden {
  display: none !important;
}

/* ── Menu ── */
.title {
  font-size: 2.4rem;
  font-weight: bold;
  line-height: 1.4;
  margin-bottom: 3rem;
}

.title .sub {
  display: block;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: normal;
  margin-top: 0.4rem;
}

/* ── Buttons ── */
.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  font-family: inherit;
  width: 240px;
}

.btn:hover { opacity: 0.85; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid #444;
}

.btn-text {
  background: transparent;
  color: var(--text-dim);
  width: auto;
  margin-top: 1.5rem;
  font-size: 0.95rem;
  border: none;
}

/* ── Mode Select ── */
h2 {
  font-size: 1.3rem;
  margin-bottom: 1.8rem;
  font-weight: normal;
  color: var(--text-dim);
}

.mode-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.btn-mode {
  background: var(--surface);
  border: 1px solid #444;
  border-radius: 12px;
  padding: 1.2rem 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: 420px;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
  color: var(--text);
  text-align: left;
}

.btn-mode:hover {
  border-color: var(--accent);
  background: #222244;
}

.mode-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 3rem;
  text-align: center;
}

.mode-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mode-name {
  font-size: 1.1rem;
  font-weight: bold;
}

.mode-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ── Level Select ── */
.level-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.btn-level {
  background: var(--surface);
  border: 1px solid #444;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  font-family: inherit;
  transition: border-color 0.15s;
  color: var(--text);
}

.btn-level:hover {
  border-color: var(--accent);
}

.level-name {
  font-weight: bold;
  font-size: 1rem;
  width: 3.2rem;
  text-align: left;
  color: var(--accent);
  flex-shrink: 0;
}

.level-desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  flex: 1;
  text-align: left;
}

.level-example {
  font-size: 0.85rem;
  color: var(--text);
  flex-shrink: 0;
  background: var(--bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Hiragino Mincho Pro', 'Noto Serif JP', 'Yu Mincho', serif;
}

/* ── Game Screen ── */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.btn-game-menu {
  background: transparent;
  border: 1px solid #444;
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, color 0.15s;
}

.btn-game-menu:hover {
  border-color: var(--accent);
  color: var(--text);
}

.game-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

/* Map */
#map-container {
  width: 100%;
  max-width: 800px;
  height: 580px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid #333;
}

#map-container svg {
  width: 100%;
  height: 100%;
}

#map-container svg.zoom-transition {
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#map-container svg .prefecture {
  fill: var(--map-default);
  stroke: var(--map-stroke);
  stroke-width: 1;
  cursor: default;
}

#map-container svg .prefecture.active-pref {
  fill: var(--map-active);
  stroke: #fff;
  stroke-width: 1.5;
}

#map-container svg .boundary-line {
  display: none;
}

.region-badge {
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--surface);
  padding: 0.2rem 0.7rem;
  border-radius: 12px;
  border: 1px solid #333;
  align-self: center;
}

/* Context (prefecture or capital shown as hint) */
.context-area {
  font-size: 1rem;
  color: #aaaacc;
  min-height: 1.5rem;
  letter-spacing: 0.05em;
}

.hidden-context {
  visibility: hidden;
}

/* Target display */
.target-display {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  justify-content: center;
}

.target-char {
  font-family: 'Hiragino Mincho Pro', 'Noto Serif JP', 'Yu Mincho', serif;
  font-size: 2.6rem;
  width: 3.2rem;
  height: 3.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border-radius: 8px;
  color: #ffffff;
  border: 1px solid #333;
}

.target-char.hidden-char {
  color: var(--hidden);
}

/* Input area */
.input-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.romaji-display {
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 1.8rem;
  color: var(--text);
  min-height: 2.4rem;
  min-width: 240px;
  text-align: center;
  letter-spacing: 0.08em;
}

.romaji-display::after {
  content: '|';
  animation: blink 0.9s step-end infinite;
  color: var(--accent);
  margin-left: 1px;
}

.romaji-display.correct-flash {
  color: var(--success);
}

.romaji-display.shake {
  animation: shake 0.28s ease-out;
  color: var(--accent);
}

.hint-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ── Result Screen ── */
.result-title {
  font-size: 2rem;
  margin-bottom: 2.5rem;
  color: var(--text);
}

.result-stats {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.stat-value {
  font-size: 2.2rem;
  font-weight: bold;
  color: var(--text);
  line-height: 1.1;
}

.stat-value-row {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}

.stat-unit {
  font-size: 1rem;
  color: var(--text-dim);
}

.result-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* ── Challenge Toggle ── */
.challenge-toggle {
  display: flex;
  border: 1px solid #444;
  border-radius: 8px;
  overflow: hidden;
  margin: 1.2rem auto 0;
  width: fit-content;
}

.btn-challenge {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.55rem 1.2rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn-challenge.active {
  background: var(--accent);
  color: #fff;
}

.btn-challenge:not(.active):hover {
  background: #222244;
  color: var(--text);
}

/* Timer warning for countdown ≤ 10s */
#timer-text.timer-warning {
  color: var(--accent);
  animation: pulse 0.6s ease-in-out infinite alternate;
}

@keyframes pulse {
  from { opacity: 1; }
  to { opacity: 0.55; }
}

/* ── Animations ── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-7px); }
  40%       { transform: translateX(7px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}