:root {
  --scale: 1;
  --ink: #1d252d;
  --muted: #65717b;
  --paper: #f6f5f1;
  --accent: #1f5268;
  --line: #e1e4e4;
  color: var(--ink);
  background: var(--paper);
  font-family:
    -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR",
    "Malgun Gothic", sans-serif;
  font-size: calc(18px * var(--scale));
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
select,
summary {
  -webkit-tap-highlight-color: transparent;
}
button {
  border: 0;
  border-radius: 15px;
  min-height: 56px;
  padding: 15px 24px;
  cursor: pointer;
  transition:
    background 0.18s,
    transform 0.18s;
  line-height: 1.4;
  color: var(--ink);
  background: #edf0f1;
  touch-action: manipulation;
}
button:hover {
  background: #dfe7eb;
}
button:active {
  transform: scale(0.985);
}
button:disabled {
  cursor: default;
  opacity: 0.9;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #1683bb;
  outline-offset: 4px;
}
.primary {
  background: var(--accent);
  color: white;
  font-weight: 650;
}
.primary:hover {
  background: #153e50;
}
.secondary {
  background: #e9eef0;
  color: #294b5d;
}
.quiet {
  background: transparent;
  color: var(--muted);
  padding: 12px 16px;
}
a {
  color: var(--accent);
  text-decoration: none;
}
.topbar {
  max-width: 1360px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 24px 40px;
}
.wordmark {
  color: var(--ink);
  font-size: 0.93rem;
  font-weight: 700;
}
.wordmark span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 450;
  margin-left: 12px;
}
.tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.size {
  flex-direction: row;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  white-space: nowrap;
}
select {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
  padding: 12px 10px;
  min-height: 50px;
  color: var(--ink);
}
main {
  max-width: 1240px;
  margin: 10px auto 60px;
  padding: 0 40px;
}
h1 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  letter-spacing: -0.045em;
  line-height: 1.18;
  margin: 0.18em 0 0.42em;
}
h2 {
  font-size: 1.32rem;
  line-height: 1.5;
  letter-spacing: -0.025em;
}
h3 {
  font-size: 1.05rem;
}
p {
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
  margin: 0.55em 0 0.9em;
}
.eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  font-weight: 650;
  color: var(--muted);
  margin: 0 0 12px;
}
.entry {
  max-width: 880px;
  text-align: center;
  padding-top: 15px;
}
.entry h1 {
  font-size: clamp(2.6rem, 6vw, 4rem);
  margin: 0.15em 0;
}
.subtitle {
  font-size: 1.35rem;
  color: var(--muted);
  margin: 0 0 20px;
}
.cover {
  margin-bottom: 35px;
  border-radius: 28px;
  box-shadow: 0 18px 48px #2b394714;
}
.art {
  aspect-ratio: 2.5;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  background-color: #e9e7de;
  position: relative;
  overflow: hidden;
}
.art-fallback {
  position: absolute;
  inset: 0;
  padding: 30px;
  background: #e8edf1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 1rem;
}
.art-fallback[hidden] {
  display: none;
}
.entry-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0;
}
.small,
small {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.6;
}
.entry form {
  max-width: 530px;
  margin: 30px auto;
  text-align: left;
}
.entry form > button {
  width: 100%;
  margin-top: 16px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.86rem;
  font-weight: 600;
}
input {
  width: 100%;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 15px;
  min-height: 58px;
  background: white;
  color: var(--ink);
}
.field-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin: 18px 0;
}
.recovery-entry { margin: 20px 0; }
.recovery-code { font-size: 2rem; font-weight: 700; letter-spacing: .18em; text-align: center; }
.common-qr { grid-template-columns: minmax(0,400px); justify-content: center; }
.scene-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  margin: 20px 0;
}
.scene-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
  text-align: right;
}
.scene-meta > span {
  font-size: 0.9rem;
}
.progress {
  height: 4px;
  border-radius: 9px;
  background: #dce3e5;
  margin-bottom: 20px;
}
.progress > span {
  display: block;
  height: 100%;
  background: #436b7c;
  border-radius: 9px;
}
.stage {
  border-radius: 26px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 10px 40px #27334015;
  background: white;
}
.drawn-stage {
  min-height: 390px;
  padding: 90px 32px 40px;
  background: linear-gradient(135deg, #e9edf0, #f9f5ee);
  text-align: center;
}
.heirs-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
}
.heirs-stage article { flex: 1; max-width: 270px; }
.heirs-stage .avatar.large { width: 170px; height: 170px; border-radius: 36px; }
.heirs-stage h2 { font-size: 1.1rem; margin: 14px 0 0; }
.heirs-stage p { font-size: .78rem; color: var(--muted); }
.heir-mark { font-size: .8rem; color: var(--muted); }
.battle-sides { display: flex; align-items: center; justify-content: center; gap: 26px; margin: 30px 0; }
.battle-sides strong { padding: 28px; border-radius: 24px; background: #ffffffc9; flex: 1; max-width: 310px; }
.battle-sides small { display: block; margin-top: 12px; }
.battle-sides > span { font-size: 2rem; color: #65788a; }
@media(max-width:650px) {
  .drawn-stage { min-height: 310px; padding: 90px 16px 25px; }
  .heirs-stage { gap: 12px; flex-wrap: wrap; }
  .heirs-stage .avatar.large { width: 100px; height: 100px; }
  .heirs-stage article { min-width: 100px; }
  .heir-mark { display: none; }
  .battle-sides { gap: 8px; }
  .battle-sides strong { padding: 16px 9px; font-size: .83rem; }
}
.stage-caption {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 18px 22px 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--muted);
}
.stage-caption span {
  font-weight: 600;
}
.clue {
  position: absolute;
  bottom: 22px;
  right: 24px;
  background: #ffffffe8;
  color: #354e60;
  box-shadow: 0 4px 20px #0002;
  font-size: 0.85rem;
}
.story-panel {
  margin-top: 20px;
  background: white;
  border: 1px solid #e5e7e7;
  border-radius: 24px;
  padding: 30px 34px;
  box-shadow: 0 8px 35px #37445105;
  animation: appear 0.2s ease;
}
.dialogue {
  display: flex;
  align-items: flex-start;
  gap: 22px;
}
.avatar {
  flex: 0 0 auto;
  display: inline-block;
  width: 76px;
  height: 76px;
  border-radius: 24px;
  background-size: 500% 200%;
  background-color: #f0eadd;
  box-shadow: 0 0 0 1px #ddd6c980;
}
.avatar.large {
  width: 110px;
  height: 110px;
  border-radius: 30px;
}
.symbol {
  display: grid;
  place-items: center;
  background: #eaf0f2;
  color: #355b6b;
  font-size: 1.3rem;
}
.speaker {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 8px;
}
.spoken {
  font-size: 1.16rem;
  margin: 0;
  line-height: 1.75;
}
.panel-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  gap: 20px;
}
.panel-actions button {
  min-width: 170px;
}
.story-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 15px 0;
}
.story-footer span {
  font-size: 0.7rem;
  color: var(--muted);
}
.choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 22px 0;
}
.choice {
  display: flex;
  align-items: flex-start;
  text-align: left;
  gap: 15px;
  background: #f3f5f6;
  border: 2px solid transparent;
  padding: 20px;
  min-height: 120px;
  font-size: 0.95rem;
}
.choice-num {
  font-size: 0.8rem;
  background: white;
  padding: 4px 8px;
  border-radius: 8px;
}
.right {
  border-color: #277556;
  background: #e8f4ee !important;
}
.wrong {
  border-color: #a84335;
  background: #fcece7 !important;
}
.muted {
  opacity: 0.55 !important;
}
.feedback {
  padding: 24px;
  border-radius: 18px;
  margin-bottom: 24px;
  line-height: 1.65;
}
.feedback strong {
  font-size: 1.18rem;
}
.correct {
  background: #e8f4ee;
  border-left: 6px solid #277556;
}
.incorrect {
  background: #fbeae5;
  border-left: 6px solid #a84335;
}
.correct-text {
  color: #277556;
}
.incorrect-text {
  color: #973c30;
}
.perspective-cards {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.perspective {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background: #f3f5f6;
  flex: 1;
  min-width: 240px;
}
.voice {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 22px 0;
  background: #f6f5f1;
  padding: 20px;
  border-radius: 16px;
}
.diagram,
.evidence {
  background: #f0f4f5;
  border-radius: 18px;
  padding: 22px;
  margin: 20px 0;
}
.diagram h3 {
  margin-top: 0;
}
.diagram-row {
  background: white;
  border-radius: 12px;
  text-align: center;
  padding: 15px;
  line-height: 1.5;
}
.diagram-branches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}
.diagram-branches > div {
  background: white;
  border-radius: 12px;
  padding: 16px;
}
.tag {
  background: #d1b389;
  color: #3d3021;
  border-radius: 10px;
  padding: 22px;
  display: inline-block;
  box-shadow: inset 0 0 0 3px #bea071;
}
.timeline {
  text-align: left;
  padding-left: 25px;
  line-height: 2;
}
.timeline b {
  display: inline-block;
  min-width: 100px;
}
.score {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 25px;
}
.score strong {
  font-size: 2.9rem;
  color: var(--accent);
}
.score span {
  color: var(--muted);
  font-size: 0.85rem;
}
.status,
.error {
  max-width: 1150px;
  margin: 10px auto;
  padding: 16px 22px;
  border-radius: 14px;
  font-size: 0.9rem;
  line-height: 1.6;
}
.status {
  background: #e9eff2;
}
.error {
  background: #fceae5;
  color: #853f34;
}
.teacher-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.teacher.entry {
  text-align: left;
}
.student-list {
  display: grid;
  gap: 14px;
  margin: 26px 0;
}
.student-row {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  background: white;
}
.student-summary {
  display: grid;
  grid-template-columns: 1.3fr 1.4fr 0.8fr;
  align-items: center;
  gap: 20px;
}
.student-summary > span {
  font-size: 0.83rem;
  color: var(--muted);
}
.student-summary > b {
  text-align: right;
  font-size: 1.2rem;
}
.student-summary small {
  font-weight: 400;
}
.student-row summary,
.danger summary,
.run-record summary {
  cursor: pointer;
  padding: 16px 0;
  min-height: 56px;
  font-size: 0.86rem;
  color: var(--accent);
}
.run-record {
  margin: 10px;
  background: #f6f7f7;
  border-radius: 15px;
  padding: 0 20px;
}
.answers-table article {
  padding: 15px 0;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
}
.answers-table p {
  margin: 0.5em 0;
}
.qr-section {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: white;
  margin: 24px 0;
}
.qr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 15px;
  margin: 25px 0;
}
.qr-card {
  text-align: center;
  background: #f6f7f7;
  border-radius: 20px;
  padding: 20px;
}
.qr-card canvas {
  display: block;
  margin: 15px auto;
  max-width: 100%;
  height: auto !important;
}
.qr-card a {
  display: block;
  font-size: 0.8rem;
}
.danger {
  margin-top: 40px;
}
.empty {
  padding: 40px;
  text-align: center;
  color: var(--muted);
}
dialog {
  position: fixed;
  inset: 8vh 0 auto;
  margin: 0 auto;
  width: min(900px, 90vw);
  max-height: 84vh;
  border: 0;
  border-radius: 28px;
  padding: 30px;
  overflow: auto;
  box-shadow: 0 20px 80px #0004;
  background: white;
  z-index: 20;
}
dialog h2 {
  margin: 0 0 20px;
}
dialog > button {
  display: block;
  margin: 24px 0 0 auto;
}
dialog .modal-content {
  line-height: 1.7;
}
.scrim {
  position: fixed;
  inset: 0;
  background: #1a28365c;
  z-index: 19;
  backdrop-filter: blur(3px);
}
.people-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.people-grid article {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
}
.people-grid p {
  font-size: 0.85rem;
}
.modal-content canvas {
  display: block;
  max-width: 100%;
  margin: 10px auto;
}
.modal-content a {
  display: block;
  text-align: center;
}
.modal-content .timeline {
  font-size: 0.9rem;
}
@keyframes appear {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 850px) {
  .topbar {
    padding: 20px 24px;
    gap: 15px;
    flex-wrap: wrap;
  }
  .wordmark span {
    display: none;
  }
  main {
    padding: 0 24px;
  }
  .choices {
    grid-template-columns: 1fr;
  }
  .choice {
    min-height: 80px;
  }
  .scene-heading {
    align-items: flex-start;
  }
  .stage-caption {
    top: 15px;
    left: 15px;
  }
  .story-panel {
    padding: 26px;
  }
  .student-summary {
    grid-template-columns: 1fr 1fr;
  }
  .student-summary strong {
    grid-column: 1/-1;
  }
  .teacher-heading {
    align-items: flex-start;
    flex-direction: column;
  }
  .scene-meta {
    font-size: 0.75rem;
  }
  .story-footer span {
    display: none;
  }
}
@media (max-width: 550px) {
  .topbar {
    padding: 14px 18px;
  }
  .tools {
    gap: 0;
  }
  main {
    padding: 0 18px;
  }
  .topbar .quiet {
    font-size: 0.7rem;
    padding: 10px;
  }
  .scene-heading {
    flex-direction: column;
    gap: 6px;
  }
  .scene-meta {
    flex-direction: row;
    text-align: left;
  }
  .scene-heading h1 {
    font-size: 1.6rem;
  }
  .stage-caption {
    font-size: 0.6rem;
    padding: 8px 10px;
  }
  .stage-caption span {
    display: none;
  }
  .clue {
    padding: 10px 14px;
    right: 12px;
    bottom: 12px;
    min-height: 50px;
    font-size: 0.7rem;
  }
  .story-panel {
    padding: 22px 18px;
  }
  .dialogue {
    gap: 14px;
  }
  .avatar {
    width: 58px;
    height: 58px;
    border-radius: 18px;
  }
  .spoken {
    font-size: 1rem;
  }
  .diagram-branches,
  .people-grid {
    grid-template-columns: 1fr;
  }
  .field-row {
    grid-template-columns: 1.5fr 1fr;
  }
  .score {
    flex-direction: column;
    gap: 8px;
  }
  .voice {
    gap: 12px;
    padding: 15px;
  }
  .voice .avatar {
    width: 56px;
    height: 56px;
  }
  dialog {
    padding: 24px 18px;
  }
  .perspective {
    min-width: 100%;
  }
  .perspective .avatar {
    width: 76px;
    height: 76px;
  }
  .entry-actions {
    flex-direction: column;
  }
  .story-footer {
    margin-top: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
/* Illustrations stay part of the touch target; all written choices remain accessible. */
.choice { position: relative; display: grid; grid-template-columns: 1fr; gap: 14px; padding: 16px; }
.choice-num { position: absolute; z-index: 1; top: 24px; left: 24px; color: #30363c; }
.choice-text { display: block; line-height: 1.55; padding: 0 3px 3px; }
.choice-pictures { display: flex; align-items: center; gap: 5px; width: 100%; }
.tile { display: block; flex: 1; position: relative; min-width: 0; aspect-ratio: 1; border-radius: 13px; background-color: #eee8df; background-size: 400% 300%; overflow: hidden; }
.tile .art-fallback { position: absolute; inset: 0; padding: 12px; font-size: .68rem; background: #eee8df; text-align: center; }
.picture-arrow { font-size: .9rem; flex: 0; color: #59656e; }
.sequence-pictures { flex-wrap: wrap; gap: 5px; }
.sequence-pictures .tile { min-width: 34%; }
.sequence-pictures .picture-arrow { flex-basis: 8%; text-align: center; }
.story-visual {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(150px, 18vw, 200px);
  align-items: start;
  gap: 20px;
  padding: 20px 22px 22px;
  background: #fff;
}
.story-visual > .art { min-width: 0; border-radius: 18px; }
.visual-inset { min-width: 0; padding: 7px; border: 1px solid var(--line); border-radius: 22px; background: #fbfaf7; }
.visual-inset .avatar.large { display: block; width: 100%; height: auto; aspect-ratio: 1; border-radius: 16px; }
.visual-notes { grid-column: 1 / -1; display: flex; align-items: center; gap: 18px; min-width: 0; }
.visual-caption { margin: 0; font-size: .9rem; line-height: 1.6; font-weight: 650; overflow-wrap: anywhere; }
@keyframes focus-appear { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 900px) {
  .choice { grid-template-columns: minmax(100px, 30%) 1fr; align-items: center; }
  .choice-pictures { grid-column: 1; }
  .choice-text { grid-column: 2; }
}
@media (max-width: 440px) {
  .choice { grid-template-columns: 1fr; }
  .choice-pictures { max-width: 200px; }
  .choice-text { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .visual-inset { animation: none; }
  .story-visual .art { transition: none; }
}

.picture-cell { display: block; min-width: 0; flex: 1; }
.picture-cell small { display: block; text-align: center; font-size: .67rem; padding-top: 6px; line-height: 1.4; }
.sequence-pictures .picture-cell { flex-basis: 34%; }
.sequence-pictures .tile { min-width: 0; }

/* The speaker picture is always present; concept art has its own small panel. */
.visual-inset.portrait-inset { grid-column: 2; grid-row: 1; }
.portrait-inset .portrait-label { display: block; margin: 6px 2px 3px; font-size: .82rem; line-height: 1.35; text-align: center; word-break: keep-all; overflow-wrap: anywhere; }
.portrait-inset .avatar.large { display: block; width: 100%; height: auto; aspect-ratio: 1; border-radius: 17px; }
.concept-inset { flex: 0 0 clamp(64px, 8vw, 90px); padding: 4px; border-radius: 16px; border: 1px solid var(--line); background: #f7f5ef; }
.concept-inset .tile { display: block; width: 100%; aspect-ratio: 1; height: auto; border-radius: 13px; }
.avatar .art-fallback { font-size: 12px; line-height: 1.3; padding: 9px; background: #f4eee4e8; }
.teacher-tabs { display: flex; gap: 8px; padding: 7px; margin: 20px 0; max-width: 490px; border-radius: 18px; background: #e9edef; }
.teacher-tabs button { flex: 1; background: transparent; border: 0; min-height: 52px; padding: 12px; border-radius: 12px; }
.teacher-tabs button.selected { background: #fff; color: #1b526c; box-shadow: 0 2px 8px #1a364315; font-weight: 700; }
.teacher-continuity { color: #586876; line-height: 1.6; margin: 8px 0 25px; }
.monitor-summary { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin: 20px 0; }
.monitor-summary article { display: flex; flex-direction: column; gap: 12px; padding: 22px; border-radius: 20px; background: #fff; border: 1px solid #e2e6e8; }
.monitor-summary span { font-size: .9rem; color: #5e6e7b; }
.monitor-summary strong { font-size: 1.8rem; }
.monitor-updated { font-size: .88rem; color: #607280; }
.saved-rooms { margin-top: 30px; }
.saved-rooms a { display: block; padding: 15px 18px; margin: 9px 0; border-radius: 14px; background: #edf2f4; }
@media(max-width: 850px) { .monitor-summary { grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media(max-width:600px) {
  .stage-caption { padding: 16px 14px 0; }
  .story-visual { grid-template-columns: minmax(0, 1fr) minmax(100px, 30%); gap: 16px; padding: 16px 14px; }
  .story-visual > .art { grid-column: 1 / -1; }
  .visual-inset.portrait-inset { grid-column: 2; grid-row: 2; padding: 5px; }
  .visual-notes { grid-column: 1; grid-row: 2; flex-direction: column; align-items: flex-start; gap: 10px; }
  .concept-inset { flex: 0 0 auto; width: 64px; }
  .portrait-inset .portrait-label { font-size: .76rem; }
}