/* Math Reality Lab layout. Tokens, .ewl-card, .ewl-btn, .ewl-chip and .ewl-msg come from ewl.css. */
.lab-page {
  margin: 0;
  min-height: 100vh;
}
.lab-wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 16px;
}
.lab-skip {
  position: absolute;
  left: 8px;
  top: -60px;
  background: var(--ewl-card);
  color: var(--ewl-brand);
  padding: 10px 14px;
  border-radius: 8px;
  z-index: 10;
}
.lab-skip:focus {
  top: 8px;
}
.lab-header {
  background: var(--ewl-brand);
  color: var(--ewl-brand-ink);
  padding: 22px 0 20px;
}
.lab-header-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}
.lab-title {
  margin: 0;
  font-size: 1.9rem;
  line-height: 1.2;
}
.lab-sub {
  margin: 6px 0 0;
  opacity: 0.92;
}
.lab-lang {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--ewl-brand-ink);
  border-color: var(--ewl-brand-ink);
}
.lab-main {
  padding-top: 18px;
  padding-bottom: 12px;
}
.lab-h2 {
  font-size: 1.35rem;
  margin: 0 0 8px;
  line-height: 1.25;
}
.lab-muted {
  color: var(--ewl-muted);
  margin: 6px 0;
}
.lab-prompt {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 8px 0 12px;
}
.lab-small {
  min-height: 36px;
  padding: 4px 12px;
  font-size: 0.9rem;
}

/* tabs */
.lab-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 2px solid var(--ewl-line);
}
.lab-tab {
  min-height: 44px;
  padding: 8px 18px;
  border: 2px solid transparent;
  border-bottom: 0;
  border-radius: 10px 10px 0 0;
  background: transparent;
  color: var(--ewl-muted);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.lab-tab[aria-selected="true"] {
  background: var(--ewl-card);
  color: var(--ewl-brand);
  border-color: var(--ewl-line);
  box-shadow: 0 2px 0 var(--ewl-card);
  margin-bottom: -2px;
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
}
.lab-panel {
  padding: 16px 0 8px;
}
.lab-mode-blurb {
  margin: 0 0 14px;
  color: var(--ewl-muted);
}

/* picker */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}
.lab-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  min-height: 44px;
}
.lab-card:hover {
  border-color: var(--ewl-brand);
}
.lab-card[data-match="1"] {
  border-width: 2px;
  border-color: var(--ewl-brand);
}
.lab-card-unit {
  font-size: 0.85rem;
  color: var(--ewl-muted);
}
.lab-card-title {
  font-size: 1.1rem;
  color: var(--ewl-brand);
}
.lab-card-status {
  align-self: flex-start;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 2px 10px;
  border: 1.5px solid var(--ewl-ok);
  color: var(--ewl-ok);
  border-radius: 999px;
}

/* the eight steps */
.lab-cycle-head {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
}
.lab-stepnav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 8px 0 14px;
  padding: 0;
}
.lab-stepbtn {
  display: flex;
  gap: 6px;
  align-items: center;
  min-height: 44px;
  padding: 4px 12px 4px 6px;
  border: 2px solid var(--ewl-line);
  border-radius: 999px;
  background: var(--ewl-card);
  color: var(--ewl-ink);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
}
.lab-stepbtn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.lab-stepbtn[aria-current="step"] {
  border-color: var(--ewl-brand);
  background: var(--ewl-brand);
  color: var(--ewl-brand-ink);
  font-weight: 700;
}
.lab-stepnum {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid currentColor;
  font-weight: 700;
  font-size: 0.85rem;
}
li[data-state="done"] .lab-stepnum::after {
  content: "";
}
li[data-state="done"] .lab-stepnum {
  background: var(--ewl-ok-bg);
  color: var(--ewl-ok);
}
li[data-state="done"] .lab-stepbtn[aria-current="step"] .lab-stepnum {
  background: transparent;
  color: inherit;
}
.lab-step-h {
  margin: 0 0 4px;
  font-size: 1.2rem;
}
.lab-step-h:focus {
  outline: none;
}
.lab-nav {
  margin: 14px 0;
  justify-content: space-between;
}
.lab-claim {
  margin: 8px 0 14px;
  padding: 12px 16px;
  border-left: 6px solid var(--ewl-accent);
  background: var(--ewl-warn-bg);
  border-radius: 8px;
  font-size: 1.1rem;
}
.lab-claim p {
  margin: 0;
}

/* controls */
.lab-controls {
  min-width: 0;
  display: grid;
  gap: 14px;
}
.lab-field {
  display: grid;
  gap: 4px;
  min-width: 0;
}
.lab-select {
  width: 100%;
}
.lab-label,
.lab-legend {
  font-weight: 700;
  font-size: 0.95rem;
}
.lab-legend {
  padding: 0;
  margin-bottom: 4px;
}
.lab-hint {
  font-size: 0.82rem;
  color: var(--ewl-muted);
}
.lab-stepper {
  display: flex;
  align-items: center;
  gap: 4px;
}
.lab-step-btn {
  padding: 0;
  width: 44px;
  font-size: 1.3rem;
}
.lab-affix {
  font-weight: 700;
  color: var(--ewl-muted);
}
.lab-num,
.lab-select,
.lab-formula,
.lab-textarea {
  min-height: 44px;
  padding: 8px 10px;
  border: 2px solid var(--ewl-line);
  border-radius: 8px;
  font: inherit;
  background: var(--ewl-card);
  color: var(--ewl-ink);
  max-width: 100%;
}
.lab-num {
  width: 6.5em;
  text-align: center;
}
.lab-num[aria-invalid="true"] {
  border-color: var(--ewl-bad);
}
.lab-textarea {
  width: 100%;
  resize: vertical;
}
.lab-formula {
  width: 100%;
  font-family: ui-monospace, Menlo, Consolas, monospace;
}
.lab-range {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  accent-color: var(--ewl-brand);
}
.lab-inline-field {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 2px 8px 2px 0;
}
.lab-chips {
  border: 0;
  padding: 0;
  margin: 0 0 12px;
  min-width: 0;
}
.lab-chip-wrap {
  position: relative;
  display: inline-block;
  max-width: 100%;
}
.lab-chip-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.lab-chip {
  white-space: normal;
  border-radius: 22px;
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  text-align: left;
}
.lab-chip-input:checked + .lab-chip {
  background: var(--ewl-brand);
  color: var(--ewl-brand-ink);
}
.lab-chip-input:checked + .lab-chip::before {
  content: "✓ ";
  margin-right: 4px;
}
.lab-chip-input:focus-visible + .lab-chip {
  outline: 3px solid var(--ewl-focus);
  outline-offset: 2px;
}
.lab-chip-input:disabled + .lab-chip {
  opacity: 0.7;
  cursor: default;
}
.lab-chip-btn {
  font-size: 0.9rem;
}

/* experiment */
.lab-experiment {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}
.lab-experiment > *,
.lab-step,
.lab-step-body,
.lab-cycle,
.lab-table-host {
  min-width: 0;
}
.lab-exp-table {
  grid-column: 1 / -1;
}
@media (min-width: 760px) {
  .lab-experiment {
    grid-template-columns: minmax(240px, 1fr) minmax(280px, 1.2fr);
  }
}
.lab-figure {
  min-height: 120px;
}
.lab-fig {
  display: block;
  max-height: 260px;
}
.lab-caption {
  font-size: 0.85rem;
  color: var(--ewl-muted);
  margin: 6px 0 0;
}
.lab-note {
  margin-top: 8px;
}
.lab-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ewl-line);
  border-radius: 10px;
  background: var(--ewl-card);
  max-width: 100%;
}
.lab-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
.lab-table th,
.lab-table td {
  min-width: 5.5rem;
  padding: 8px 10px;
  border-bottom: 1px solid var(--ewl-line);
  text-align: left;
  vertical-align: top;
}
.lab-table th {
  background: var(--ewl-bg);
}
.lab-table tr[data-flag="bad"] td:last-child {
  color: var(--ewl-bad);
  font-weight: 700;
}
.lab-table tr[data-flag="ok"] td:last-child {
  color: var(--ewl-ok);
  font-weight: 700;
}
.lab-table tr.is-selected td {
  background: var(--ewl-ok-bg);
}
.lab-check {
  width: 24px;
  height: 24px;
}

/* discourse */
.disc h4 {
  margin: 18px 0 6px;
  font-size: 1.05rem;
  color: var(--ewl-brand);
}
.disc-sec {
  margin-bottom: 8px;
}
.disc-preview {
  font-weight: 600;
  margin: 8px 0;
}
.disc-text {
  margin: 0 0 8px;
  padding: 10px 14px;
  border-left: 5px solid var(--ewl-brand);
  background: var(--ewl-bg);
  border-radius: 6px;
}
.disc-checks {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}
.disc-checks li {
  padding: 4px 0;
}
.disc-checks li[data-ok="1"] {
  color: var(--ewl-ok);
}
.disc-list {
  padding-left: 18px;
}
.disc-counter {
  margin: 8px 0;
}
.disc-case {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 8px 0;
}
.lab-picture {
  margin-top: 8px;
}

/* done */
.lab-done h3 {
  margin: 14px 0 4px;
}

/* notebook */
.lab-notebook {
  margin-top: 8px;
  padding-bottom: 40px;
}
.lab-nb-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-top: 2px solid var(--ewl-line);
  padding-top: 16px;
}
.lab-badge {
  display: inline-block;
  min-width: 28px;
  padding: 0 8px;
  text-align: center;
  background: var(--ewl-brand);
  color: var(--ewl-brand-ink);
  border-radius: 999px;
  font-size: 0.9rem;
}
.nb-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}
.nb-activity {
  margin: 14px 0;
  padding: 12px 16px;
  background: var(--ewl-card);
  border: 1px solid var(--ewl-line);
  border-radius: var(--ewl-radius);
}
.nb-activity h3 {
  margin: 0;
  font-size: 1.1rem;
}
.nb-entries {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}
.nb-entry {
  padding: 10px 0;
  border-top: 1px solid var(--ewl-line);
}
.nb-entry-head {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.nb-when {
  color: var(--ewl-muted);
  font-size: 0.88rem;
}
.nb-step {
  font-weight: 700;
  font-size: 0.85rem;
  padding: 1px 10px;
  border: 1.5px solid var(--ewl-brand);
  color: var(--ewl-brand);
  border-radius: 999px;
}
.nb-del {
  margin-left: auto;
}
.nb-fields {
  margin: 6px 0 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2px 14px;
}
.nb-fields dt {
  font-weight: 700;
  color: var(--ewl-muted);
}
.nb-fields dd {
  margin: 0;
  overflow-wrap: anywhere;
}
@media (max-width: 520px) {
  .nb-fields {
    grid-template-columns: 1fr;
  }
  .lab-title {
    font-size: 1.5rem;
  }
  .lab-nav .ewl-btn {
    flex: 1;
  }
  .lab-stepname {
    display: none;
  }
  .lab-stepbtn[aria-current="step"] .lab-stepname {
    display: inline;
  }
}

/* blank worksheet */
.lab-blank-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 14px 0;
}
.ws {
  background: #fff;
  color: #111;
  padding: 18px 22px;
  border: 1px solid var(--ewl-line);
  border-radius: 10px;
}
.ws h2 {
  margin: 0 0 6px;
}
.ws h3 {
  margin: 14px 0 4px;
  font-size: 1.05rem;
}
.ws p {
  margin: 4px 0;
}
.ws-line {
  border-bottom: 1.5px solid #555;
  height: 30px;
}
.ws-opts {
  list-style: none;
  padding: 0;
  margin: 4px 0;
}
.ws-table td {
  height: 30px;
  min-width: 60px;
  border: 1px solid #777;
}
.ws-table th {
  border: 1px solid #777;
  background: #f1f1f1;
  white-space: normal;
}
.ws-foot {
  margin-top: 18px;
  font-size: 0.8rem;
  color: #555;
}
.ws-sec {
  break-inside: avoid;
}

@media (prefers-reduced-motion: reduce) {
  .lab-page * {
    transition: none !important;
    animation: none !important;
  }
}
@media (forced-colors: active) {
  .lab-chip-input:checked + .lab-chip {
    outline: 3px solid Highlight;
  }
}

/* print: the notebook, one activity per page; or the blank worksheet */
@media print {
  .lab-page {
    background: #fff;
    color: #000;
  }
  .ewl-noprint,
  .lab-skip {
    display: none !important;
  }
  .lab-print-notebook .lab-header,
  .lab-print-notebook .lab-main,
  .lab-print-notebook .lab-nb-toggle {
    display: none !important;
  }
  .lab-print-notebook .lab-nb-body {
    display: block !important;
  }
  .lab-print-notebook .nb-activity {
    break-after: page;
    break-inside: avoid-page;
    border: 0;
    padding: 0;
  }
  .lab-print-notebook .nb-activity:last-child {
    break-after: auto;
  }
  .lab-blank .ws {
    border: 0;
    padding: 0;
  }
  .lab-blank .lab-header {
    display: none;
  }
  .nb-entry {
    break-inside: avoid;
  }
}