.door-trainer-page { padding-top: 46px; }
.door-trainer-intro { max-width: 900px; }
.door-trainer-intro .lede { max-width: 860px; }
.door-trainer-intro h1 { max-width: 620px; }

.door-rules {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0;
}
.door-rules span {
  min-height: 80px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f7f8f3;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.42;
}
.door-rules strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: .82rem;
}

.door-trainer-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(28, 33, 26, .07);
}
.door-trainer-topbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
  background: #f8f9f4;
}
.door-stat,
.door-timer-stat {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 10px;
  border-right: 1px solid var(--line);
}
.door-stat:last-child { border-right: 0; }
.door-stat span,
.door-timer-stat span {
  color: var(--muted);
  font-size: .62rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.door-stat strong,
.door-timer-stat strong {
  margin-top: 2px;
  font-size: 1.55rem;
  letter-spacing: -.045em;
}
.door-timer-stat em {
  margin-top: -2px;
  color: var(--muted);
  font-size: .58rem;
  font-style: normal;
}
.door-timer-track {
  height: 5px;
  background: #ecefe7;
}
.door-timer-track span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--dark);
  transform-origin: left center;
}

.door-game-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(296px, .45fr);
  min-width: 0;
}
.door-plan-panel,
.door-answer-panel { min-width: 0; }
.door-plan-panel {
  padding: 20px;
  border-right: 1px solid var(--line);
  background: #fbfcf8;
}
.door-answer-panel { padding: 20px; }
.door-plan-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}
.door-plan-head h2 {
  margin: 3px 0 0;
  font-size: 1.28rem;
}
.door-round-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: .72rem;
  white-space: nowrap;
}
.door-reset { min-height: 34px; padding: 6px 9px; font-size: .68rem; }

.door-canvas-wrap {
  overflow: hidden;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
.door-svg { display: block; width: 100%; height: auto; }
.door-plan-note {
  margin: 10px 2px 0;
  color: var(--muted);
  font-size: .69rem;
  line-height: 1.45;
}

.door-svg .door-plan-border { fill: #fff; stroke: #e1e5db; stroke-width: 2; }
.door-svg .door-wall { fill: #e7eae2; stroke: #1c211a; stroke-width: 3; }
.door-svg .door-jamb { stroke: #1c211a; stroke-width: 4; stroke-linecap: square; }
.door-svg .door-leaf { stroke: #1c211a; stroke-width: 8; stroke-linecap: square; }
.door-svg .door-leaf-edge { stroke: #fff; stroke-width: 2; opacity: .82; }
.door-svg .door-swing-arc { fill: none; stroke: #67705f; stroke-width: 2.75; stroke-dasharray: 7 5; }
.door-svg .door-closed-line { stroke: #a7ada0; stroke-width: 2; stroke-dasharray: 5 5; }
.door-svg .door-hinge-dot { fill: #1c211a; }
.door-svg .door-reference-line { stroke: #9dad2f; stroke-width: 3; }
.door-svg .door-reference-arrow { fill: #9dad2f; }
.door-svg .door-reference-tag { fill: #edf4b2; stroke: #d7e27b; stroke-width: 1.5; }
.door-svg .door-other-tag { fill: #f4f6f1; stroke: #dde1d8; stroke-width: 1.5; }
.door-svg .door-reference-text,
.door-svg .door-other-text,
.door-svg .door-arrow-label,
.door-svg .door-number {
  fill: #1c211a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-anchor: middle;
}
.door-svg .door-reference-text { font-size: 13px; font-weight: 900; letter-spacing: .06em; }
.door-svg .door-other-text { font-size: 11px; font-weight: 800; fill: #687064; letter-spacing: .05em; }
.door-svg .door-arrow-label { font-size: 12px; font-weight: 820; fill: #687064; letter-spacing: .04em; }
.door-svg .door-number { font-size: 14px; font-weight: 900; }

.door-answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}
.door-answer-grid button {
  min-height: 94px;
  padding: 13px 9px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: transform .1s ease, border-color .1s ease, background .1s ease;
}
.door-answer-grid button:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: #aeb7a6;
  background: #f7f8f3;
}
.door-answer-grid button:disabled { cursor: default; opacity: .48; }
.door-answer-grid button strong {
  display: block;
  font-size: 1.55rem;
  letter-spacing: -.04em;
}
.door-answer-grid button span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: .69rem;
  font-weight: 760;
  line-height: 1.28;
}
.door-answer-grid button.is-correct {
  border-color: #8ca424;
  background: #edf4b2;
  color: #273011;
  opacity: 1;
}
.door-answer-grid button.is-wrong {
  border-color: #d38a7f;
  background: #fae4df;
  color: #672f27;
  opacity: 1;
}

.door-reference-card {
  margin-top: 12px;
  padding: 11px 12px;
  border: 1px solid #dfe4d6;
  border-radius: 13px;
  background: #f7f8f3;
}
.door-reference-card span {
  display: block;
  color: #687064;
  font-size: .58rem;
  font-weight: 900;
  letter-spacing: .08em;
}
.door-reference-card p {
  margin: 5px 0 0;
  color: #535b4e;
  font-size: .7rem;
  line-height: 1.45;
}

.door-feedback {
  margin-top: 14px;
  padding: 12px 13px;
  border-radius: 12px;
  font-size: .8rem;
  line-height: 1.45;
}
.door-feedback.hidden { display: none; }
.door-feedback.is-correct { background: #edf4b2; color: #34410d; border: 1px solid #d6e176; }
.door-feedback.is-wrong { background: #fae4df; color: #6a3028; border: 1px solid #edc0b6; }
.door-feedback.is-summary { background: #eef1e8; color: var(--text); border: 1px solid var(--line); }
.door-feedback details { margin-top: 7px; }
.door-feedback summary { cursor: pointer; font-weight: 800; }
.door-feedback p { margin: 5px 0 0; }
.door-primary { width: 100%; min-height: 50px; margin-top: 14px; }

@media (max-width: 900px) {
  .door-rules { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .door-game-grid { grid-template-columns: 1fr; }
  .door-plan-panel { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 650px) {
  .door-trainer-page { padding-top: 24px; }
  .door-rules { gap: 8px; margin: 18px 0; }
  .door-rules span { min-height: 72px; padding: 10px 11px; font-size: .68rem; }
  .door-trainer-shell { border-radius: 16px; }
  .door-stat,
  .door-timer-stat { min-height: 61px; padding: 7px 4px; }
  .door-stat strong,
  .door-timer-stat strong { font-size: 1.28rem; }
  .door-plan-panel,
  .door-answer-panel { padding: 12px; }
  .door-plan-head { align-items: flex-start; }
  .door-plan-head h2 { font-size: 1.08rem; }
  .door-round-tools { align-items: flex-end; flex-direction: column; gap: 5px; font-size: .64rem; }
  .door-reset { min-height: 30px; padding: 5px 7px; font-size: .62rem; }
  .door-canvas-wrap { margin-top: 10px; border-radius: 12px; }
  .door-plan-note { font-size: .67rem; }
  .door-answer-grid { gap: 8px; }
  .door-answer-grid button { min-height: 74px; padding: 9px 6px; border-radius: 12px; }
  .door-answer-grid button strong { font-size: 1.28rem; }
  .door-answer-grid button span { font-size: .62rem; }
  .door-reference-card { margin-top: 9px; padding: 9px 10px; }
  .door-reference-card p { font-size: .68rem; }
  .door-primary { margin-top: 10px; }
}

@media (max-width: 360px) {
  .door-rules { grid-template-columns: 1fr; }
  .door-answer-grid { grid-template-columns: 1fr 1fr; }
  .door-answer-grid button { min-height: 74px; }
}