/* intro.css — Start Here (teacher), guided tour, exploration, featured lesson, presenter view and the return bar.
   Tokens and shared components (.btn, .panel, .crumbs, .eyebrow, details) come from ds.css; this file adds layout only.
   Speaking = Rose & Garnet, Writing = Burnished Copper, per DESIGN-SYSTEM.md. No motion beyond what ds.css allows. */

.in-page {
  --in-gap: clamp(1rem, 2.4vw, 1.5rem);
  max-width: 74rem;
  margin-inline: auto;
  display: grid;
  gap: var(--in-gap);
  padding-block: 0.5rem 3rem;
}
.in-page h1,
.in-page h2,
.in-page h3 {
  margin: 0;
}
.in-head {
  display: grid;
  gap: 0.5rem;
}
.in-head h1 {
  font-size: clamp(1.9rem, 4.6vw, 2.8rem);
  line-height: 1.12;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.in-lead {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  max-width: 44rem;
  margin: 0;
  color: var(--ink-2);
}
.in-ic {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  flex: none;
  border-radius: 0.75rem;
  background: var(--brand-soft);
  color: var(--brand-ink);
}
.in-ic svg {
  width: 1.4rem;
  height: 1.4rem;
}
.in-page :focus-visible,
.in-next :focus-visible,
.intro-return :focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
}

/* ── Start Here: the three choices ── */
.in-choices {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.in-choices > li {
  display: flex;
}
.in-choice {
  flex: 1;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  align-items: start;
  gap: 0.35rem 0.85rem;
  min-height: 9rem;
  padding: 1.25rem;
  border: 2px solid var(--line-strong);
  border-radius: var(--r-lg, 1rem);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
}
.in-choice:hover {
  box-shadow: var(--shadow-lift);
  border-color: var(--brand);
}
.in-choice.is-tour {
  border-color: var(--brand);
  background: var(--brand-soft);
}
.in-choice.is-tour .in-ic {
  background: var(--surface);
}
.in-field .btn.small {
  justify-self: start;
}
.in-choice-text {
  display: grid;
  gap: 0.3rem;
}
.in-choice-text strong {
  font-size: 1.3rem;
  line-height: 1.2;
}
.in-choice-text span {
  color: var(--ink-2);
}
.in-go {
  grid-column: 2;
  justify-self: end;
  color: var(--brand);
}
.in-quiet {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 0;
  color: var(--ink-2);
}
.in-quiet a {
  color: var(--brand-ink);
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

/* ── Step list (tour and exploration) ── */
.in-steps ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
}
.in-steps a {
  display: grid;
  justify-items: center;
  gap: 0.25rem;
  padding: 0.6rem 0.4rem;
  min-height: 3.5rem;
  border: 2px solid var(--line);
  border-radius: 0.8rem;
  text-align: center;
  color: var(--ink);
  text-decoration: none;
  background: var(--surface);
  font-weight: 600;
}
.in-steps small {
  display: block;
  font-weight: 400;
  color: var(--ink-2);
}
.in-steps [aria-current="step"] a {
  border-color: var(--brand);
  background: var(--brand);
  color: var(--on-brand);
}
.in-steps [aria-current="step"] small {
  color: inherit;
}
.in-steps .is-tried a::after {
  content: "✓";
}
.in-num {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--surface-3);
  color: var(--ink);
  font-size: 0.9rem;
}
.in-steps [aria-current="step"] .in-num {
  background: var(--on-brand);
  color: var(--brand);
}

/* ── Panels, fields, notes ── */
.in-panel {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1rem, 2.6vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg, 1rem);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.in-panel > p,
.in-panel > ul,
.in-panel > ol {
  margin: 0;
}
.in-action {
  font-size: 1.15rem;
}
.in-notice {
  background: var(--sage-200);
  border-color: var(--sage-500);
}
.in-note {
  margin: 0;
  padding: 0.6rem 0.9rem;
  border-left: 4px solid var(--brand);
  background: var(--brand-soft);
  border-radius: 0.4rem;
}
.in-field {
  display: grid;
  gap: 0.4rem;
  border: 0;
  padding: 0;
  margin: 0;
  min-width: 0;
}
.in-field > label,
.in-field > legend {
  font-weight: 700;
}
.in-field textarea,
.in-field input[type="text"] {
  width: 100%;
  min-height: 3rem;
  font: inherit;
  padding: 0.6rem 0.75rem;
  border: 2px solid var(--line-control);
  border-radius: 0.6rem;
  background: var(--surface);
  color: var(--ink);
}
.in-opt {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.1rem;
  cursor: pointer;
}
.in-opt input {
  width: 1.4rem;
  height: 1.4rem;
  margin-top: 0.15rem;
  flex: none;
  accent-color: var(--brand);
}
.in-tried {
  font-weight: 700;
}
.in-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}
.in-nav .btn {
  min-width: 8rem;
}
.in-foot {
  display: grid;
  gap: 0.5rem;
  justify-items: start;
}
.in-foot p {
  margin: 0;
  max-width: 44rem;
}
.in-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0;
}

/* ── Activity cards, pathways ── */
.in-paths,
.in-mini-paths {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.in-path {
  display: grid;
  gap: 0.8rem;
  align-content: start;
}
.in-path h2,
.in-mini-paths h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.in-mini-paths ul {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
}
.in-act {
  display: grid;
  gap: 0.55rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 6px solid var(--room, var(--brand));
  border-radius: 0.9rem;
  background: var(--surface);
}
.in-act.pw-speaking,
.in-path.pw-speaking,
.in-focus-btn.pw-speaking {
  --room: var(--speaking);
  --room-soft: var(--speaking-soft);
}
.in-act.pw-writing,
.in-path.pw-writing,
.in-focus-btn.pw-writing {
  --room: var(--writing);
  --room-soft: var(--writing-soft);
}
.in-act h3 {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  font-size: 1.2rem;
}
.in-act .in-ic {
  background: var(--room-soft, var(--brand-soft));
  color: var(--room, var(--brand));
}
.in-act p {
  margin: 0;
}
.in-where {
  color: var(--ink-2);
  font-size: 0.95rem;
}
.in-try {
  padding: 0.5rem 0.7rem;
  background: var(--room-soft, var(--brand-soft));
  border-radius: 0.5rem;
}
.in-act .btn {
  justify-self: start;
}
.in-preview,
.in-more,
.in-later {
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  padding: 0.2rem 0.9rem;
  background: var(--surface-2);
}
.in-preview summary,
.in-more summary,
.in-later summary {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  font-weight: 700;
  cursor: pointer;
}
.in-preview dl,
.in-facts {
  display: grid;
  gap: 0.2rem 1rem;
  margin: 0 0 0.8rem;
}
.in-preview dt,
.in-facts dt {
  font-weight: 700;
  margin-top: 0.5rem;
}
.in-preview dd,
.in-facts dd {
  margin: 0;
}
.in-sample {
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border-left: 4px solid var(--room, var(--brand));
}
.in-switch p {
  margin: 0;
}
.in-supports h4 {
  margin: 0.6rem 0 0.2rem;
}

/* ── Exploration ── */
.in-focus {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.in-focus-btn {
  display: grid;
  gap: 0.4rem;
  justify-items: start;
  min-height: 9rem;
  padding: 1.25rem;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: var(--room-soft);
  border: 3px solid var(--line-strong);
  border-radius: var(--r-lg, 1rem);
  cursor: pointer;
}
.in-focus-btn strong {
  font-size: 1.5rem;
}
.in-focus-btn[aria-pressed="true"] {
  border-color: var(--room);
  box-shadow: var(--shadow-lift);
}
.in-focus-btn .in-ic {
  background: var(--surface);
  color: var(--room);
}
.in-chosen {
  display: inline-flex;
  gap: 0.3rem;
  font-weight: 700;
  color: var(--room);
}
.in-card-plan {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  border: 2px dashed var(--line-strong);
  border-radius: 0.9rem;
}
.in-frame {
  line-height: 2.6;
  font-size: 1.1rem;
  margin: 0;
}
.in-blank {
  min-width: 7rem;
  max-width: 100%;
  font: inherit;
  padding: 0.25rem 0.5rem;
  margin-inline: 0.25rem;
  border: 0;
  border-bottom: 3px solid var(--line-control);
  background: var(--surface-2);
  color: var(--ink);
}
.in-steps-list {
  margin: 0;
  padding-left: 1.3rem;
  display: grid;
  gap: 0.4rem;
}
.in-plan-sheet {
  border: 1px solid var(--line-strong);
  border-radius: 0.8rem;
  padding: 0.8rem 1rem;
}
.in-plan-text {
  white-space: pre-wrap;
  font: inherit;
  margin: 0;
}
.in-later ul {
  list-style: none;
  padding: 0 0 0.8rem;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

/* ── Lesson ── */
.in-use {
  border-width: 2px;
  border-color: var(--brand);
}
.in-use input[readonly] {
  background: var(--surface-2);
}
.in-prompt figure {
  margin: 0;
  max-width: 30rem;
}
.in-prompt img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--surface);
}
.in-quote {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}
.in-lesson-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--in-gap);
}
.in-min {
  font-weight: 400;
  color: var(--ink-2);
  font-size: 0.95rem;
}
.in-level {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.in-seg {
  min-height: 2.75rem;
  padding: 0.4rem 1rem;
  font: inherit;
  font-weight: 700;
  border: 2px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}
.in-seg[aria-pressed="true"] {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--on-brand);
}
.in-checks {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0;
  display: grid;
  gap: 0.3rem;
}
.in-checks li {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.in-checks .is-found {
  color: var(--right);
  font-weight: 700;
}
.in-seq {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.in-seq li {
  display: grid;
  padding: 0.4rem 0.8rem;
  border-radius: 0.6rem;
  background: var(--surface-3);
}
.in-seq span {
  color: var(--ink-2);
  font-size: 0.9rem;
}
.in-summary dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.2rem 1rem;
}
.in-summary dd {
  margin: 0;
}

/* ── Presenter ── */
.in-slide {
  min-height: 18rem;
  align-content: start;
}
.in-slide h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}
.in-range {
  font-weight: 700;
  color: var(--brand);
  margin: 0;
}
.in-big {
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  margin: 0;
}
.in-qr {
  margin: 0;
  display: grid;
  gap: 0.4rem;
  justify-items: start;
}
.in-qr svg {
  width: 10.5rem;
  height: 10.5rem;
  background: #fff;
  padding: 0.4rem;
  border: 1px solid var(--line);
}
.in-backups dt {
  font-weight: 700;
  margin-top: 0.6rem;
}
.in-backups dd {
  margin: 0;
}
.in-hint {
  margin: 0;
}

/* ── Return bar (any lab page opened from an introduction page) ── */
.intro-return {
  position: fixed;
  inset-inline: 0.75rem;
  bottom: 0.75rem;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  max-width: 34rem;
  margin-inline: auto;
  padding: 0.5rem;
  border: 2px solid var(--brand);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow-float);
}
body.has-intro-return .lab-footer {
  padding-bottom: 5rem;
}
.in-next {
  display: grid;
  gap: 0.6rem;
  margin-top: 2rem;
  padding: 1rem 1.2rem;
  border: 2px solid var(--sage-500);
  border-radius: 1rem;
  background: var(--sage-200);
}
.in-next h2 {
  margin: 0;
  font-size: 1.2rem;
}
.in-next-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0;
}

@media (max-width: 860px) {
  .in-choices,
  .in-paths,
  .in-mini-paths,
  .in-focus {
    grid-template-columns: minmax(0, 1fr);
  }
  .in-choice {
    min-height: 0;
  }
  .in-steps ol {
    grid-template-columns: repeat(5, minmax(2.8rem, 1fr));
  }
  .in-step-name {
    display: none;
  }
  .in-steps [aria-current="step"] .in-step-name {
    display: block;
    grid-column: 1 / -1;
  }
}
@media (max-width: 560px) {
  .in-nav .btn {
    flex: 1 1 100%;
  }
  .in-blank {
    min-width: 5rem;
  }
}
@media print {
  .in-nav,
  .in-steps,
  .in-foot button,
  .in-later,
  .intro-return,
  .in-next,
  .in-hint {
    display: none !important;
  }
  .in-page {
    max-width: none;
    padding: 0;
  }
  .in-panel {
    box-shadow: none;
    break-inside: avoid;
  }
}

/* ── Teacher overview under the three choices (/start, src/intro/start-overview.js) ── */
.ov-glance {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.ov-glance li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.85rem;
  border-radius: 0.9rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.ov-glance strong {
  display: block;
  margin-bottom: 0.15rem;
}
.ov-glance span:last-child {
  color: var(--ink-2);
  font-size: 0.95rem;
}
.ov-glance strong {
  color: var(--ink);
  font-size: 1rem;
}
.ov-progress ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}
.ov-progress li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}
.ov-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  align-items: center;
  padding: 0.6rem 0;
  border-block: 1px solid var(--line);
  color: var(--ink-2);
}
.ov-jump a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--brand-ink);
  font-weight: 600;
}
.ov-section {
  display: grid;
  gap: 0.8rem;
  scroll-margin-top: 5rem;
}
.ov-section > p,
.ov-section > h2 {
  margin: 0;
}
.ov-lesson,
.ov-pd {
  grid-template-columns: minmax(0, 18rem) minmax(0, 1fr);
  align-items: start;
  scroll-margin-top: 5rem;
}
.ov-pd {
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
}
.ov-lesson figure {
  margin: 0;
}
.ov-lesson img {
  width: 100%;
  height: auto;
  border-radius: 0.8rem;
  border: 1px solid var(--line);
}
.ov-lesson-text {
  display: grid;
  gap: 0.6rem;
}
.ov-lesson-text p,
.ov-lesson-text h2,
.ov-pd p,
.ov-pd h2 {
  margin: 0;
}
.ov-pd > div {
  display: grid;
  gap: 0.6rem;
}
.ov-routines {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.ov-length {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  font-weight: 700;
  color: var(--room, var(--brand));
}
.ov-routine .btn {
  align-self: end;
}
.ov-share,
.ov-files {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}
.ov-share {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.ov-share li {
  display: grid;
  gap: 0.25rem;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--surface);
}
.ov-share a {
  color: var(--brand-ink);
}
.ov-files li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.75rem;
  border-bottom: 1px solid var(--line);
}
.ov-files li span {
  flex: 1;
}
.ov-files a {
  font-weight: 700;
  color: var(--brand-ink);
  min-width: 2.75rem;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}
@media (max-width: 980px) {
  .ov-glance {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ov-routines {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 760px) {
  .ov-lesson,
  .ov-pd,
  .ov-share {
    grid-template-columns: minmax(0, 1fr);
  }
  .ov-lesson figure {
    max-width: 22rem;
  }
}
@media (max-width: 480px) {
  .ov-glance {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── Teacher frame (src/intro/shell.js): one midnight band with the section nav on every /start page ── */
.ts-band {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.4vw, 1.75rem);
  padding: clamp(0.75rem, 2vw, 1.1rem) clamp(1rem, 3vw, 2.25rem) clamp(1.25rem, 3vw, 2.25rem);
  border-radius: var(--r-xl);
  overflow: hidden;
  color: #eef0f7;
  background:
    radial-gradient(55% 70% at 85% 10%, rgb(69 90 154 / 55%), transparent 70%),
    radial-gradient(40% 60% at 0% 100%, rgb(138 58 92 / 22%), transparent 70%),
    radial-gradient(35% 45% at 100% 100%, rgb(154 74 38 / 20%), transparent 70%),
    var(--grain),
    linear-gradient(160deg, var(--mi-800), var(--mi-950) 72%);
  box-shadow: var(--shadow-float);
}
.ts-band.is-compact {
  padding-bottom: 1.1rem;
}
.ts-nav {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgb(255 255 255 / 14%);
}
.ts-nav ul {
  flex: 1;
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.ts-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  color: #dfe3f2;
  font-weight: 650;
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
}
@media (max-width: 1439px) {
  .ts-nav ul a svg {
    display: none;
  }
  .ts-nav a {
    padding-inline: 0.7rem;
  }
}
.ts-nav a .ico,
.ts-nav a svg {
  width: 1.05rem;
  height: 1.05rem;
  opacity: 0.85;
}
.ts-nav a:hover {
  background: rgb(255 255 255 / 10%);
  color: #fff;
}
.ts-nav a[aria-current="page"] {
  background: #fff;
  color: var(--mi-950);
}
.ts-nav-guide {
  flex: none;
  border: 1px solid rgb(255 255 255 / 30%);
}
.ts-band :focus-visible {
  outline: 3px solid #f5d6a8;
  outline-offset: 2px;
}
.ts-hero {
  display: grid;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: center;
}
.has-aside .ts-hero {
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
}
.ts-copy {
  display: grid;
  gap: 0.7rem;
  max-width: 46rem;
}
.ts-eyebrow {
  margin: 0;
  color: #f5d6a8;
  font-weight: 700;
  font-size: 0.95rem;
}
.ts-band h1 {
  margin: 0;
  color: #fff;
  font: 600 clamp(1.9rem, 1.2rem + 2.6vw, 3.1rem) / 1.08 var(--font-display);
  letter-spacing: -0.02em;
}
.ts-band.is-compact h1 {
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.2rem);
}
.ts-lead {
  margin: 0;
  color: #d5daea;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.5;
}
.ts-lead strong {
  color: #fff;
}
.ts-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.3rem 0 0;
  padding: 0;
  list-style: none;
}
.ts-chips li {
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgb(255 255 255 / 10%);
  border: 1px solid rgb(255 255 255 / 18%);
  color: #eef0f7;
  font-size: 0.92rem;
  font-weight: 600;
}
.ts-note {
  margin: 0;
  color: #d5daea;
}
.ts-note a,
.ts-lead a {
  color: #fff;
}
.ts-progress {
  display: grid;
  gap: 0.4rem;
  max-width: 28rem;
  margin-top: 0.3rem;
}
.ts-progress-text {
  font-weight: 700;
  color: #fff;
}
.ts-bar {
  height: 0.45rem;
  border-radius: 999px;
  background: rgb(255 255 255 / 16%);
  overflow: hidden;
}
.ts-bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #f5d6a8, #dba3b9);
}
.ts-feature {
  display: grid;
  overflow: hidden;
  border-radius: var(--r-lg, 1rem);
  background: var(--ivory, #fbf8f1);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow-lift);
}
.ts-feature img {
  width: 100%;
  height: auto;
  display: block;
}
.ts-feature-text {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem 1rem 1rem;
}
.ts-feature-text small {
  color: var(--ink-2);
  font-weight: 700;
}
.ts-feature-text strong {
  font: 600 1.2rem/1.2 var(--font-display);
}
.ts-feature:hover {
  box-shadow: var(--shadow-float);
}
.ts-lift {
  position: relative;
  margin-top: calc(-1 * clamp(1.5rem, 3vw, 2.5rem));
  padding-inline: clamp(0.5rem, 2vw, 1.5rem);
}

/* Two-column steps: a sticky rail beside the content (tour and exploration). */
.ts-layout {
  display: grid;
  grid-template-columns: minmax(13rem, 16rem) minmax(0, 1fr);
  gap: clamp(1rem, 2.5vw, 2rem);
  align-items: start;
}
.ts-main {
  padding-bottom: 1rem;
  display: grid;
  gap: var(--in-gap, 1.25rem);
  min-width: 0;
}
.ts-rail {
  position: sticky;
  top: 5.5rem;
}
.ts-rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.25rem;
  position: relative;
}
.ts-rail a {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: center;
  min-height: 3.25rem;
  padding: 0.45rem 0.6rem;
  border-radius: 0.8rem;
  color: var(--ink);
  text-decoration: none;
}
.ts-rail a:hover {
  background: var(--surface-2);
}
.ts-num {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background: var(--surface);
  font-weight: 700;
  font-size: 0.9rem;
}
.ts-num svg {
  width: 1rem;
  height: 1rem;
}
.ts-step {
  display: grid;
  line-height: 1.25;
}
.ts-step small {
  color: var(--ink-2);
  font-size: 0.85rem;
}
.ts-rail .is-done .ts-num {
  background: var(--sage-200);
  border-color: var(--sage-500);
  color: var(--sage-900);
}
.ts-rail [aria-current="step"] a {
  background: var(--surface);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.ts-rail [aria-current="step"] .ts-num {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--on-brand);
}
.ts-do h2,
.in-notice h2,
.ts-main .in-panel > h2 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font: 600 1.4rem/1.2 var(--font-display);
}
.in-notice {
  border-left: 6px solid var(--sage-500);
}
.ts-actions {
  position: sticky;
  bottom: 0;
  z-index: 5;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-lift);
}
.ts-actions .btn.ghost {
  border: 1px solid var(--line-strong);
}
@media (max-width: 980px) {
  .has-aside .ts-hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .ts-aside {
    max-width: 26rem;
  }
  .ts-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .ts-rail {
    position: static;
  }
  .ts-rail ol {
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
  }
  .ts-rail a {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    min-height: 2.75rem;
    padding: 0.35rem;
  }
  .ts-rail .ts-step {
    display: none;
  }
  .ts-rail [aria-current="step"] .ts-step {
    display: none;
  }
}
@media (max-width: 640px) {
  .ts-nav {
    flex-wrap: wrap;
  }
  .ts-nav-guide {
    order: -1;
    margin-left: auto;
  }
  .ts-nav ul {
    flex-basis: 100%;
  }
  .ts-lift {
    margin-top: 0;
    padding-inline: 0;
  }
  .ts-actions {
    padding: 0.6rem;
  }
}
@media print {
  .ts-band,
  .ts-rail,
  .ts-actions {
    display: none !important;
  }
}

/* ── Activity Guide (/start/activities) ── */
.ts-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.3rem 0 0;
}
.ts-downloads a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgb(255 255 255 / 30%);
  color: #fff;
  font-weight: 650;
  text-decoration: none;
}
.ts-downloads a:hover {
  background: rgb(255 255 255 / 10%);
}
.ag-index .ts-num {
  border-radius: 0.6rem;
}
.ag-basics-list {
  margin: 0;
  padding-left: 1.3rem;
  display: grid;
  gap: 0.4rem;
}
.ag-card {
  display: grid;
  gap: 1rem;
  padding: clamp(1rem, 2.6vw, 1.75rem);
  border: 1px solid var(--line);
  border-top: 6px solid var(--room, var(--brand));
  border-radius: var(--r-lg, 1rem);
  background: var(--surface);
  box-shadow: var(--shadow);
  scroll-margin-top: 5.5rem;
}
.ag-card.pw-speaking {
  --room: var(--speaking);
  --room-soft: var(--speaking-soft);
}
.ag-card.pw-writing {
  --room: var(--writing);
  --room-soft: var(--writing-soft);
}
.ag-card.pw-reading {
  --room: var(--reading);
  --room-soft: var(--reading-soft);
}
.ag-card.pw-vocabulary {
  --room: var(--listening);
  --room-soft: var(--listening-soft);
}
.ag-head {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}
.ag-head .in-ic {
  background: var(--room-soft);
  color: var(--room);
}
.ag-head h2 {
  margin: 0.1rem 0 0.3rem;
  font: 600 1.6rem/1.15 var(--font-display);
}
.ag-head p {
  margin: 0;
}
.ag-kind {
  color: var(--room);
  font-weight: 700;
  font-size: 0.92rem;
}
.ag-body {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 1.25rem;
}
.ag-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.ag-body h4 {
  margin: 0.8rem 0 0.2rem;
  font-size: 0.95rem;
}
.ag-body p,
.ag-body ul {
  margin: 0;
}
.ag-steps ol {
  margin: 0 0 0.6rem;
  padding: 0;
  list-style: none;
  counter-reset: ag;
  display: grid;
  gap: 0.55rem;
}
.ag-steps li {
  counter-increment: ag;
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0.6rem;
}
.ag-steps li::before {
  content: counter(ag);
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--room);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}
.ag-side {
  padding: 1rem;
  border-radius: 0.9rem;
  background: var(--room-soft);
}
.ag-side ul {
  padding-left: 1.1rem;
}
.ag-teach {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
}
.ag-teach div {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
}
.ag-teach dt {
  font-weight: 700;
  color: var(--room);
}
.ag-teach dd,
.ag-stuck dd {
  margin: 0.2rem 0 0;
}
.ag-stuck {
  margin: 0 0 0.8rem;
}
.ag-stuck dt {
  font-weight: 700;
  margin-top: 0.5rem;
}
@media (max-width: 860px) {
  .ag-body,
  .ag-teach {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 980px) {
  .ag-index {
    display: none;
  }
}

/* ── Layers of depth: How the site teaches, Activity Guide views ── */
.ov-loop {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.6rem;
}
.ov-loop li {
  position: relative;
  display: grid;
  gap: 0.3rem;
  align-content: start;
  padding: 0.9rem;
  border-radius: 0.9rem;
  background: var(--surface);
  border: 1px solid var(--line);
}
.ov-loop li span:last-child {
  color: var(--ink-2);
  font-size: 0.95rem;
}
.ov-loop-n {
  display: grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 700;
}
.ov-cancan {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.ov-cancan h3 {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin: 0;
}
.ov-cancan ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.35rem;
}
.ov-cannot {
  background: var(--copper-200, var(--surface-2));
}
.ov-words {
  margin: 0 0 0.8rem;
}
.ov-words dt {
  font-weight: 700;
  margin-top: 0.6rem;
}
.ov-words dd {
  margin: 0.15rem 0 0;
}
.ag-view {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.ag-deep {
  display: grid;
  gap: 1rem;
  padding-top: 0.5rem;
}
.ag-why {
  padding: 0.8rem 1rem;
  border-left: 4px solid var(--room, var(--brand));
  background: var(--surface-2);
  border-radius: 0.5rem;
}
.ag-why h3,
.ag-stuck-wrap h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
}
.ag-why p {
  margin: 0;
}
.ag-steps h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}
@media (max-width: 980px) {
  .ov-loop {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 640px) {
  .ov-loop,
  .ov-cancan {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── /start overview: grade picker card, domain cards, guide, resources, families (src/intro/start*.js) ── */
.ov-start {
  display: grid;
  gap: 1.1rem;
  padding: clamp(1rem, 2.4vw, 1.5rem);
  margin-inline: clamp(0.5rem, 2vw, 1.5rem);
  border-radius: var(--r-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
}
.ov-start.ts-lift {
  padding-inline: clamp(1rem, 2.4vw, 1.5rem);
}
.ov-start .in-choices {
  margin: 0;
}
.ov-head {
  display: grid;
  gap: 0.35rem;
  max-width: 48rem;
}
.ov-head > * {
  margin: 0;
}
.ov-head h2 {
  font: 600 clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem) / 1.15 var(--font-display);
}
.ov-section {
  padding-top: clamp(0.5rem, 2vw, 1.25rem);
}
.ov-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.3rem 0 0;
}
.tb-domain .ov-card-actions .btn {
  margin-top: 0;
}
.ov-guide {
  max-width: 56rem;
}
.ov-cancan {
  align-items: start;
}
.ov-can {
  display: grid;
  gap: 0.6rem;
  padding: 1rem 1.1rem;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--sage-200, var(--surface-2));
}
.ov-can.ov-cannot {
  background: var(--copper-200, var(--surface-2));
}
.ov-can h3 {
  font-size: 1.05rem;
}
/* Resources: a quiet library list, one row per item, format badges and actions on the right. */
.ov-res-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.ov-res {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr) auto;
  gap: 0.4rem 1rem;
  align-items: center;
  padding: 1rem 0.25rem;
  border-bottom: 1px solid var(--line);
}
.ov-res-ic {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius);
  background: var(--pearl-blue, var(--surface-2));
  color: var(--brand-ink, var(--brand));
}
.ov-res-body {
  display: grid;
  gap: 0.25rem;
}
.ov-res-body > * {
  margin: 0;
}
.ov-res-body h3 {
  font-size: 1.1rem;
}
.ov-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.ov-badge {
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink-2);
  font-size: 0.82rem;
  font-weight: 700;
}
.ov-res-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
  margin: 0;
}
/* Families: one warm card in the speaking room's colours, the share panel on the right. */
.ov-fam-card {
  --room: var(--speaking);
  --room-soft: color-mix(in srgb, var(--rose-200, var(--speaking-soft)) 45%, var(--surface));
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  padding: clamp(1.1rem, 3vw, 2rem);
  border-radius: var(--r-xl);
  background: var(--room-soft);
  border: 1px solid color-mix(in srgb, var(--room) 28%, transparent);
}
.ov-fam-intro,
.ov-fam-share {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}
.ov-fam-intro > *,
.ov-fam-share > * {
  margin: 0;
}
.ov-fam-intro h2 {
  font: 600 clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem) / 1.15 var(--font-display);
}
.ov-gets {
  list-style: none;
  margin: 0.3rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem 1rem;
}
.ov-gets li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.6rem;
  align-items: start;
}
.ov-gets .in-ic {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--room);
  color: #fff;
}
.ov-gets strong {
  display: block;
}
.ov-fam-share {
  padding: 1.1rem;
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.ov-fam-for {
  display: grid;
  gap: 0.1rem;
}
.ov-fam-for strong {
  font: 600 1.25rem/1.2 var(--font-display);
}
.ov-fam-url code {
  display: block;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}
.ov-fam-files h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}
.ov-fam-files ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ov-fam-files li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border-top: 1px solid var(--line);
}
.ov-fam-files li span {
  flex: 1;
}
.ov-fam-files a {
  display: inline-flex;
  align-items: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  font-weight: 700;
  color: var(--brand-ink, var(--brand));
}
.ov-more h3 {
  margin: 0;
}
.ov-more > h3,
.ov-lesson-text h3 {
  font: 600 1.4rem/1.2 var(--font-display);
}
.ov-more > h3 {
  margin-top: 0.75rem;
}
.ov-routine h4 {
  margin: 0;
  font-size: 1.1rem;
}
.ov-explore {
  margin: 0;
}
@media (max-width: 860px) {
  .ov-fam-card {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 640px) {
  .ov-start {
    margin-inline: 0;
  }
  .ov-res {
    grid-template-columns: 2.75rem minmax(0, 1fr);
  }
  .ov-res-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }
  .ov-gets {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── Teacher nav on phones: one scrollable row with faded edges, never overlapping labels ── */
.ts-nav li {
  flex: none;
}
@media (max-width: 640px) {
  .ts-nav ul {
    scroll-snap-type: x proximity;
    padding-inline-end: 1.5rem;
    mask-image: linear-gradient(90deg, #000 85%, transparent);
  }
  .ts-nav li {
    scroll-snap-align: start;
  }
  .ts-nav a {
    padding-inline: 0.75rem;
    border: 1px solid rgb(255 255 255 / 18%);
  }
}