.screen {
  display: none;
}

.screen.active {
  display: block;
}

.journey-shell {
  padding-bottom: 56px;
}

.intro-panel,
.result-card {
  max-width: 860px;
  margin: 0 auto;
}

.intro-panel h2,
.section-title h2,
.result-card h2 {
  margin: 12px 0 8px;
  color: var(--color-primary);
  font-size: 30px;
  line-height: 1.25;
}

.intro-panel p,
.section-title p,
.result-card p {
  margin: 0;
  color: var(--color-muted);
}

.method-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.method-list div {
  min-height: 58px;
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 12px 14px;
  background: #fbf9ff;
  color: var(--color-text);
  font-weight: 700;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.preview-card,
.level-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: #fff;
}

.preview-card {
  padding: 14px;
}

.preview-card strong,
.preview-card span {
  display: block;
}

.preview-card strong {
  color: var(--color-primary);
}

.preview-card span {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 13px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.action-row.center {
  justify-content: center;
}

.action-row.between {
  justify-content: space-between;
}

.section-title {
  margin-bottom: 18px;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.level-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.level-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.level-num {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-weight: 900;
}

.level-card h3 {
  margin: 18px 0 8px;
  font-size: 20px;
}

.level-card p {
  margin: 0;
  color: var(--color-muted);
}

.level-meta {
  display: grid;
  gap: 6px;
  margin: auto 0 16px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 800;
}

.case-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.case-header h2 {
  margin: 10px 0 4px;
  font-size: 26px;
  line-height: 1.25;
}

.case-header p {
  margin: 0;
  color: var(--color-muted);
}

.round-state {
  min-width: 118px;
  border-radius: var(--radius-card);
  padding: 12px;
  background: var(--color-surface-soft);
  text-align: center;
}

.round-state strong {
  display: block;
  color: var(--color-primary);
  font-size: 30px;
  line-height: 1;
}

.round-state span {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
}

.practice-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.75fr);
  gap: 18px;
}

.practice-main {
  display: grid;
  gap: 16px;
}

.practice-side {
  display: grid;
  align-content: start;
  gap: 16px;
}

.card-label {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 900;
}

.question-card p {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.travel-diagram {
  display: grid;
  gap: 14px;
}

.line-diagram {
  min-height: 88px;
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 10px;
  border-radius: var(--radius-card);
  padding: 18px;
  background: #f7fbff;
}

.route-line {
  min-height: 88px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  border-radius: var(--radius-card);
  padding: 18px;
  background: #f7fbff;
}

.line-diagram span,
.route-line span,
.queue-end,
.queue-body,
.messenger {
  border-radius: 999px;
  padding: 7px 10px;
  background: #fff;
  border: 1px solid #cfe0ff;
  color: #2b5c9f;
  font-weight: 800;
  text-align: center;
}

.road-label {
  min-width: 108px;
}

.arrow {
  height: 2px;
  position: relative;
  background: var(--color-primary);
}

.arrow::after {
  content: "";
  position: absolute;
  top: -5px;
  width: 10px;
  height: 10px;
  border-top: 2px solid var(--color-primary);
  border-right: 2px solid var(--color-primary);
}

.arrow.right::after,
.arrow.toward:first-of-type::after {
  right: 0;
  transform: rotate(45deg);
}

.arrow.left::after,
.arrow.toward:last-of-type::after {
  left: 0;
  transform: rotate(225deg);
}

.actor-row,
.diagram-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.actor-row span,
.diagram-tags span {
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 800;
}

.diagram-phase,
.crossroad-grid > div {
  border: 1px solid #d7e4ff;
  border-radius: var(--radius-card);
  padding: 14px;
  background: #f7fbff;
}

.diagram-phase h4,
.crossroad-grid h4 {
  margin: 0 0 8px;
  color: var(--color-primary);
}

.bar-diagram {
  display: grid;
  gap: 12px;
}

.bar-diagram div {
  display: grid;
  grid-template-columns: 1fr 110px;
  align-items: center;
  gap: 12px;
}

.bar {
  height: 26px;
  display: block;
  border-radius: 999px;
  background: #cfe0ff;
}

.bar.short {
  width: 48%;
  background: #ffe0b5;
}

.queue-diagram {
  min-height: 132px;
  display: grid;
  grid-template-columns: minmax(58px, auto) minmax(120px, 1fr) minmax(58px, auto);
  grid-template-areas:
    "tail body head"
    "role role role";
  align-items: center;
  gap: 16px 14px;
  position: relative;
  border-radius: var(--radius-card);
  padding: 18px 20px;
  background: #f7fbff;
}

.queue-diagram .queue-end:first-child {
  grid-area: tail;
}

.queue-diagram .queue-end:nth-child(3) {
  grid-area: head;
}

.queue-body {
  grid-area: body;
  min-height: 42px;
  display: grid;
  place-items: center;
  background: #fff7e8;
  border-color: #f6cf91;
  color: #9a5a00;
}

.messenger {
  grid-area: role;
  justify-self: start;
  margin-left: clamp(74px, 18%, 128px);
  background: #f2ebff;
  color: var(--color-primary);
}

.crossroad-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.crossroad-grid p {
  margin: 0;
  color: var(--color-text);
  font-weight: 700;
}

.step-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  color: var(--color-muted);
  font-size: 14px;
}

.step-list {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.step-item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 10px;
  background: #f9fafb;
}

.step-item > span {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #eef2f7;
  font-weight: 900;
}

.step-item strong,
.step-item p {
  display: block;
  margin: 0;
}

.step-item p {
  color: var(--color-muted);
  font-size: 14px;
}

.step-item.current {
  border-color: rgba(79, 127, 217, 0.45);
  background: rgba(79, 127, 217, 0.08);
}

.step-item.done {
  border-color: rgba(34, 160, 107, 0.36);
  background: rgba(34, 160, 107, 0.08);
}

.step-item.done > span {
  background: rgba(34, 160, 107, 0.18);
  color: #176c4a;
}

.step-item.error {
  border-color: rgba(229, 72, 77, 0.45);
  background: rgba(229, 72, 77, 0.08);
}

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

.choice-btn,
.digit-key {
  min-height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: #fff;
  color: var(--color-text);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.choice-btn.selected {
  border-color: var(--color-primary);
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.confirm-btn {
  width: 100%;
  margin-top: 12px;
}

.number-field {
  display: grid;
  grid-template-columns: 1fr minmax(92px, auto) auto;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.number-field label {
  font-weight: 800;
}

.number-field output {
  min-height: 44px;
  min-width: 88px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--color-primary);
  border-radius: var(--radius-control);
  background: #fff;
  color: var(--color-primary);
  font-size: 24px;
  font-weight: 900;
}

.digit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.digit-key {
  min-height: 56px;
  font-size: 22px;
}

.digit-key.confirm-key {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.digit-key:disabled,
.confirm-btn:disabled {
  background: var(--color-disabled);
  color: var(--color-muted);
  border-color: var(--color-disabled);
  cursor: not-allowed;
}

.feedback-box {
  margin-top: 14px;
}

.feedback-box p,
.feedback-box small {
  display: block;
  margin: 0;
}

.feedback-box small {
  margin-top: 8px;
  color: var(--color-muted);
}

.feedback-box.success,
.feedback-box.error,
.feedback-box.info,
.question-summary {
  border-radius: var(--radius-card);
  padding: 14px;
}

.feedback-box.success,
.question-summary {
  border: 1px solid rgba(34, 160, 107, 0.35);
  background: rgba(34, 160, 107, 0.08);
  color: #176c4a;
}

.feedback-box.error {
  border: 1px solid rgba(229, 72, 77, 0.35);
  background: rgba(229, 72, 77, 0.08);
  color: #9d2e31;
}

.feedback-box.info {
  border: 1px solid rgba(79, 127, 217, 0.32);
  background: rgba(79, 127, 217, 0.08);
  color: #315b9d;
}

.feedback-box .btn {
  margin-top: 10px;
}

.question-summary p {
  margin: 6px 0 14px;
}

.side-card h3 {
  margin: 0 0 10px;
}

.side-card p,
.side-card li {
  color: var(--color-muted);
}

.side-card ul {
  margin: 0;
  padding-left: 18px;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.result-stats div {
  border-radius: var(--radius-card);
  padding: 16px;
  background: var(--color-surface-soft);
  text-align: center;
}

.result-stats strong,
.result-stats span {
  display: block;
}

.result-stats strong {
  color: var(--color-primary);
  font-size: 28px;
}

.result-stats span {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 800;
}

@media (max-width: 900px) {
  .practice-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .intro-panel h2,
  .section-title h2,
  .result-card h2 {
    font-size: 24px;
  }

  .method-list,
  .preview-grid,
  .level-grid,
  .crossroad-grid,
  .result-stats,
  .choice-grid {
    grid-template-columns: 1fr;
  }

  .case-header,
  .action-row.between {
    display: grid;
  }

  .line-diagram {
    grid-template-columns: minmax(42px, auto) minmax(24px, 1fr) minmax(72px, auto) minmax(24px, 1fr) minmax(42px, auto);
    gap: 6px;
    padding: 12px 10px;
  }

  .route-line {
    grid-template-columns: minmax(42px, auto) minmax(42px, 1fr) minmax(42px, auto);
    gap: 8px;
    padding: 12px 10px;
  }

  .line-diagram span,
  .route-line span,
  .queue-end,
  .queue-body,
  .messenger {
    padding: 6px 8px;
    font-size: 12px;
    line-height: 1.25;
  }

  .arrow {
    width: 100%;
    min-height: 2px;
  }

  .road-label {
    min-width: 0;
  }

  .queue-diagram {
    grid-template-columns: minmax(44px, auto) minmax(96px, 1fr) minmax(44px, auto);
    gap: 14px 8px;
    padding: 14px 10px;
  }

  .messenger {
    margin-left: clamp(60px, 20%, 92px);
  }

  .number-field {
    grid-template-columns: 1fr;
  }

  .digit-key {
    min-height: 50px;
  }
}