:root {
  --bg: #f5f1e8;
  --panel: rgba(255, 251, 245, 0.88);
  --ink: #1b1918;
  --sub: #5f584e;
  --primary: #ef7a42;
  --primary-dark: #cb5b25;
  --secondary: #1f8a70;
  --sky: #5aa9e6;
  --yellow: #f4c542;
  --danger: #d95d39;
  --line: rgba(27, 25, 24, 0.1);
  --shadow: 0 18px 40px rgba(59, 42, 23, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Zen Maru Gothic", sans-serif;
  font-size: 18px;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 203, 119, 0.45), transparent 28%),
    radial-gradient(circle at top right, rgba(90, 169, 230, 0.25), transparent 24%),
    linear-gradient(180deg, #fffaf2 0%, #f3ebdf 100%);
}

button,
select,
input {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.app-header,
.screen-header,
.progress-label-row,
.combo-row,
.action-bar-row,
.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.action-bar-row[hidden] {
  display: none;
}

.app-header {
  margin-bottom: 20px;
}

.app-main {
  display: grid;
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
  padding: 28px;
}

.hero-copy h2,
.screen-header h2,
.summary-card h3,
.settings-panel h3 {
  margin: 0;
  line-height: 1.35;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.2;
}

.hero-copy h2 {
  font-size: clamp(2rem, 3.4vw, 3rem);
}

.screen-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.summary-card h3,
.settings-panel h3 {
  font-size: 1.45rem;
}

.hero-text,
.choice-label,
.small-label,
.hint-box,
.status-box,
.judgement-box,
.note-list,
#homeSettingsSummary,
#homeChallengeSummary {
  color: var(--sub);
}

.hero-text,
.hint-box,
.status-box,
.note-list,
#homeSettingsSummary,
#homeChallengeSummary {
  font-size: 1.08rem;
  line-height: 1.75;
}

.choice-label {
  font-size: 1.18rem;
  line-height: 1.6;
}

.hero-tag,
.eyebrow,
.small-label {
  margin: 0 0 8px;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.build-badge {
  margin: 0;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--sub);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.hero-actions,
.summary-grid,
.card-grid,
.play-layout,
.execute-layout,
.challenge-layout,
.settings-grid,
.teacher-screen-layout,
.choice-grid,
.judge-actions,
.action-bars {
  display: grid;
  gap: 16px;
}

.hero-actions {
  align-content: center;
}

.summary-grid,
.execute-layout,
.settings-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.play-layout {
  grid-template-columns: minmax(0, 1fr);
}

.summary-card,
.prompt-panel,
.choice-panel,
.camera-panel,
.action-panel,
.challenge-panel,
.settings-panel {
  padding: 24px;
}

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.level-card {
  padding: 20px;
  border-radius: 26px;
  min-height: 220px;
  display: grid;
  gap: 14px;
  align-content: start;
  color: #fff;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.level-card:hover,
.level-card:focus-visible,
.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-2px);
}

.level-card p,
.level-card h3 {
  margin: 0;
}

.level-card h3 {
  font-size: 1.55rem;
  line-height: 1.35;
}

.level-card p {
  font-size: 1.08rem;
  line-height: 1.6;
}

.primary-button,
.secondary-button,
.ghost-button {
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease, background-color 180ms ease;
}

.primary-button,
.secondary-button {
  min-height: 64px;
  padding: 12px 24px;
  font-size: 1.3rem;
  font-weight: 700;
}

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

.secondary-button {
  background: var(--secondary);
  color: #fff;
}

.ghost-button {
  min-height: 48px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  border: 1px solid var(--line);
  font-size: 1.05rem;
  font-weight: 700;
}

.home-button {
  min-height: 88px;
  font-size: 1.55rem;
}

.screen-header-actions {
  display: flex;
  gap: 12px;
}

.progress-block,
.challenge-prompt-card {
  display: grid;
  gap: 10px;
}

.progress-bar,
.meter {
  height: 16px;
  border-radius: 999px;
  background: rgba(27, 25, 24, 0.08);
  overflow: hidden;
}

.action-bar-row span:first-child {
  width: 64px;
  flex: 0 0 64px;
}

.action-bar-row .meter {
  flex: 1 1 auto;
  min-width: 120px;
}

.progress-fill,
.meter-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  transition: width 220ms ease;
}

.progress-fill {
  background: linear-gradient(90deg, var(--yellow), var(--primary));
}

.challenge-fill {
  background: linear-gradient(90deg, #6ed49b, #1f8a70);
}

.scene-prompt,
.instruction-text {
  margin: 0;
  font-size: clamp(1.85rem, 3vw, 2.8rem);
  line-height: 1.5;
}

.scene-illustration {
  min-height: 360px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.35), rgba(90, 169, 230, 0.25));
  display: grid;
  place-items: center;
  font-size: 5rem;
  overflow: hidden;
}

.scene-illustration-image {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  display: block;
}

.play-panel {
  display: grid;
  gap: 18px;
}

.scene-illustration.feedback {
  gap: 10px;
  padding: 20px;
  text-align: center;
  background: linear-gradient(135deg, rgba(255, 191, 105, 0.45), rgba(239, 122, 66, 0.22));
}

.scene-illustration.feedback.success {
  background: linear-gradient(135deg, rgba(110, 212, 155, 0.42), rgba(90, 169, 230, 0.2));
}

.scene-illustration.feedback strong {
  font-size: 1.7rem;
}

.scene-illustration.feedback span {
  font-size: 4.2rem;
  line-height: 1;
}

.hint-box,
.status-box,
.challenge-prompt-card {
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px dashed rgba(27, 25, 24, 0.15);
}

.challenge-illustration-image {
  min-height: 0;
  max-height: 320px;
  border-radius: 18px;
  margin: 10px 0 14px;
  object-fit: cover;
}

.teacher-screen-layout {
  grid-template-columns: minmax(0, 1fr);
}

.teacher-screen-panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px;
  display: grid;
  gap: 22px;
}

.teacher-screen-neutral {
  background: rgba(255, 251, 245, 0.92);
}

.teacher-screen-success {
  background: linear-gradient(135deg, rgba(110, 212, 155, 0.18), rgba(255, 251, 245, 0.95));
}

.teacher-screen-retry {
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.2), rgba(255, 251, 245, 0.95));
}

.teacher-screen-card {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.teacher-screen-avatar {
  min-height: 320px;
  border-radius: 28px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(90, 169, 230, 0.22), rgba(31, 138, 112, 0.18));
  border: 1px solid rgba(27, 25, 24, 0.08);
  display: grid;
  place-items: center;
}

.teacher-screen-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.teacher-screen-fallback {
  font-size: 5rem;
}

.teacher-screen-copy {
  display: grid;
  gap: 12px;
}

.teacher-screen-label,
.teacher-screen-message,
.teacher-screen-detail {
  margin: 0;
}

.teacher-screen-label {
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--sub);
}

.teacher-screen-message {
  font-size: clamp(2rem, 3.4vw, 3rem);
  line-height: 1.4;
  font-weight: 700;
}

.teacher-screen-detail {
  font-size: 1.18rem;
  line-height: 1.8;
  color: var(--sub);
}

.choice-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.choice-button {
  min-height: 120px;
  padding: 18px;
  border-radius: 24px;
  border: 2px solid transparent;
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.choice-button strong,
.choice-button span {
  display: block;
}

.choice-button strong {
  font-size: 1.28rem;
  line-height: 1.45;
}

.choice-button span {
  margin-top: 8px;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--sub);
}

.choice-button.is-selected {
  border-color: var(--primary);
  background: rgba(239, 122, 66, 0.08);
}

.perform-button {
  width: 100%;
}

.perform-button[hidden] {
  display: none;
}

.camera-frame {
  position: relative;
  min-height: 360px;
  border-radius: 28px;
  overflow: hidden;
  background: #111;
}

#cameraPreview,
.camera-fallback {
  width: 100%;
  height: 100%;
}

#cameraPreview {
  object-fit: cover;
}

.camera-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  color: #fff;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(31, 138, 112, 0.85), rgba(90, 169, 230, 0.85));
}

.camera-fallback[hidden] {
  display: none;
}

.countdown-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
}

.countdown-value,
.combo-value {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1;
  margin: 0;
}

.meter-stop {
  background: linear-gradient(90deg, #ffd166, #ef476f);
}

.meter-look {
  background: linear-gradient(90deg, #73c2fb, #5aa9e6);
}

.meter-speak {
  background: linear-gradient(90deg, #fcbf49, #f77f00);
}

.judge-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.challenge-panel {
  max-width: 760px;
  margin: 0 auto;
}

.challenge-prompt-card {
  min-height: 160px;
  align-content: center;
  font-size: 1.35rem;
  color: var(--ink);
}

.settings-panel {
  display: grid;
  gap: 18px;
}

.setting-item {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  align-items: center;
}

.setting-item select,
.setting-item input[type="range"] {
  width: min(280px, 45%);
}

.note-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.8;
}

@media (max-width: 900px) {
  .hero,
  .summary-grid,
  .play-layout,
  .execute-layout,
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 17px;
  }

  .app-shell {
    width: min(100% - 20px, 100%);
    padding-top: 16px;
  }

  .app-header,
  .screen-header,
  .countdown-box,
  .setting-item,
  .combo-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .choice-grid,
  .judge-actions {
    grid-template-columns: 1fr;
  }

  .teacher-screen-card {
    grid-template-columns: 1fr;
  }

  .teacher-screen-avatar {
    min-height: 220px;
  }

  .hero,
  .summary-card,
  .prompt-panel,
  .choice-panel,
  .camera-panel,
  .action-panel,
  .challenge-panel,
  .settings-panel {
    padding: 18px;
  }

  .scene-illustration {
    min-height: 240px;
    font-size: 4rem;
  }

  .scene-illustration-image {
    min-height: 240px;
  }

  .camera-frame {
    min-height: 240px;
  }

  .setting-item select,
  .setting-item input[type="range"] {
    width: 100%;
  }
}