:root {
  --accent: #55c5ff;
  --accent-2: #93f7cd;
  --radius: 18px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(900px 460px at 15% -10%, var(--bg-glow-1) 0%, transparent 60%),
    radial-gradient(900px 520px at 100% 0%, var(--bg-glow-2) 0%, transparent 55%),
    linear-gradient(180deg, color-mix(in srgb, black 94%, var(--accent) 6%) 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input, select {
  font: inherit;
}

button {
  touch-action: manipulation;
}

.shell {
  width: min(1120px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 18px 0 32px;
}

.hud {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--ui-surface-hud);
  padding: 10px;
  opacity: 0;
  animation: rise 600ms ease-out 100ms forwards;
}

.hud-btn {
  flex: 0 1 124px;
  min-width: 0;
}

.stat {
  box-shadow: var(--shadow);
}

.difficulty-control {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  background: linear-gradient(180deg, color-mix(in srgb, black 82%, var(--panel) 18%), color-mix(in srgb, black 88%, var(--panel-3) 12%));
  box-shadow: var(--shadow);
}

.difficulty-control span {
  color: var(--muted);
  font-size: 12px;
}

select,
.input-answer {
  border: 1px solid var(--line);
  background: color-mix(in srgb, black 90%, var(--panel) 10%);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  min-height: 46px;
  outline: none;
}

select:focus,
.input-answer:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, transparent 82%, var(--accent) 18%);
}

.btn {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  min-height: 46px;
  padding: 10px 14px;
  color: var(--text);
  background: linear-gradient(180deg, color-mix(in srgb, black 76%, var(--accent) 24%), color-mix(in srgb, black 88%, var(--panel-3) 12%));
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, opacity 120ms ease;
}

.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.btn-secondary {
  background: linear-gradient(180deg, color-mix(in srgb, black 82%, var(--text) 18%), color-mix(in srgb, black 92%, var(--panel-3) 8%));
}

.combat-summary {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 14px;
}

.combat-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: linear-gradient(180deg, color-mix(in srgb, black 82%, var(--panel) 18%), color-mix(in srgb, black 88%, var(--panel-3) 12%));
  box-shadow: var(--shadow);
}

.combat-card-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.panel {
  background: linear-gradient(180deg, color-mix(in srgb, black 82%, var(--panel) 18%), color-mix(in srgb, black 88%, var(--panel-3) 12%));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-label {
  padding: 12px 14px 0;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.bar {
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: color-mix(in srgb, black 90%, var(--panel) 10%);
  border: 1px solid var(--line);
}

.bar-fill {
  height: 100%;
  width: 100%;
  transition: width 180ms ease;
}

.player-fill {
  background: linear-gradient(90deg, color-mix(in srgb, white 20%, var(--accent) 80%), var(--accent-2));
}

.enemy-fill {
  background: linear-gradient(90deg, color-mix(in srgb, white 35%, var(--danger) 65%), var(--warn));
}

.split-layout {
  display: grid;
  grid-template-rows: 1fr 1.05fr;
  gap: 14px;
  min-height: 68vh;
}

.battle-panel,
.question-panel {
  display: flex;
  flex-direction: column;
}

.battle-stage {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 0.9fr) 1fr;
  gap: 14px;
  align-items: center;
  padding: 18px;
  min-height: 300px;
}

.avatar-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: color-mix(in srgb, transparent 58%, black 42%);
}

.sprite-frame {
  min-height: 164px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 18%, color-mix(in srgb, transparent 78%, var(--accent) 22%), transparent 50%),
    linear-gradient(180deg, color-mix(in srgb, black 86%, var(--panel) 14%), color-mix(in srgb, black 92%, var(--panel-3) 8%));
  border: 1px solid color-mix(in srgb, transparent 15%, var(--line-strong) 85%);
  margin-bottom: 12px;
}

.enemy-card .sprite-frame {
  background:
    radial-gradient(circle at 50% 18%, color-mix(in srgb, transparent 76%, var(--danger) 24%), transparent 52%),
    linear-gradient(180deg, color-mix(in srgb, black 78%, var(--danger) 22%), color-mix(in srgb, black 90%, var(--panel-3) 10%));
}

.sprite {
  font-size: clamp(70px, 10vw, 108px);
  line-height: 1;
  user-select: none;
}

.battle-center {
  text-align: center;
}

.floor-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  margin-bottom: 12px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, transparent 38%, black 62%);
  color: var(--accent-2);
  font-weight: 700;
}

.message-line {
  min-height: 52px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  padding: 12px;
  background: color-mix(in srgb, transparent 58%, black 42%);
  border: 1px solid var(--line);
  margin-bottom: 12px;
}

.intent-chip {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: color-mix(in srgb, transparent 88%, var(--accent) 12%);
  border: 1px solid color-mix(in srgb, transparent 72%, var(--accent) 28%);
  color: var(--accent);
  font-size: 13px;
}

.combat-log {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  gap: 8px;
  text-align: left;
}

.combat-log li {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, transparent 45%, var(--line-strong) 55%);
  background: color-mix(in srgb, transparent 66%, black 34%);
  color: var(--muted);
  font-size: 13px;
}

.avatar-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
}

.question-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px 8px;
}

.question-header h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.15;
}

.question-header h2:lang(ja) {
  letter-spacing: 0.03em;
}

.question-prompt {
  margin: 0;
  color: var(--muted);
}

.word-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.pill {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: color-mix(in srgb, transparent 48%, black 52%);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.answer-area {
  padding: 12px 18px 8px;
  display: grid;
  gap: 10px;
  flex: 1;
  align-content: start;
}

.answers-choices {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.answer-btn {
  text-align: left;
  justify-content: flex-start;
  padding: 12px 14px;
  min-height: 60px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-radius: 14px;
}

.answer-btn strong {
  font-size: 16px;
  line-height: 1.25;
}

.answer-btn:lang(ja) strong {
  font-size: 19px;
}

.answer-btn span {
  color: var(--muted);
  font-size: 12px;
}

.answer-btn.correct {
  border-color: color-mix(in srgb, transparent 30%, var(--accent-2) 70%);
  box-shadow: 0 0 0 3px color-mix(in srgb, transparent 84%, var(--accent-2) 16%);
}

.answer-btn.wrong {
  border-color: color-mix(in srgb, transparent 25%, var(--danger) 75%);
  box-shadow: 0 0 0 3px color-mix(in srgb, transparent 86%, var(--danger) 14%);
}

.typed-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.support-line {
  min-height: 48px;
  margin: 0;
  padding: 0 18px 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.message {
  margin: 14px 0 0;
  min-height: 24px;
  color: var(--muted);
}

.message.good { color: var(--accent-2); }
.message.bad { color: var(--danger); }

@media (max-width: 860px) {
  .combat-summary {
    grid-template-columns: 1fr;
  }

  .split-layout {
    display: flex;
    flex-direction: column;
    min-height: auto;
  }

  .question-panel {
    order: 1;
  }

  .battle-panel {
    order: 2;
  }

  .battle-stage {
    grid-template-columns: 1fr;
    min-height: auto;
  }

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

  .word-meta {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .answers-choices {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100vw - 14px, 100%);
    padding-top: 14px;
  }

  .typed-wrap {
    grid-template-columns: 1fr;
  }

  .sprite-frame {
    min-height: 130px;
  }

  .support-line {
    padding-bottom: 14px;
  }
}