:root {
  --u6-navy: #071f4f;
  --u6-green: #17785f;
  --u6-green-dark: #0c5d49;
  --u6-coral: #cf4a44;
  --u6-gold: #d9a441;
  --u6-ink: #182235;
  --u6-muted: #526176;
  --u6-paper: #ffffff;
  --u6-soft: #f1f8f5;
  --u6-blue-soft: #edf3fc;
  --u6-gold-soft: #fff7e2;
  --u6-coral-soft: #fff1ef;
  --u6-border: #d8e4e0;
  --u6-shadow: 0 16px 38px rgba(7, 31, 79, 0.11);
}

.unit6-explanation-page {
  max-width: 100%;
  overflow-x: hidden;
  background: #f4f7fb;
  color: var(--u6-ink);
}

.unit6-hero {
  width: 100%;
  max-width: 100%;
  margin: 0;
  box-sizing: border-box;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(7, 31, 79, 0.94), rgba(23, 120, 95, 0.52)),
    url("../img/english-intermediate/unit-6/unit-6-future-plans-advice-hero.webp") center / cover no-repeat;
  color: #fff;
  grid-template-columns: minmax(0, 1fr);
}

.unit6-hero .lesson-hero-content {
  width: 100%;
  max-width: 780px;
  min-width: 0;
  box-sizing: border-box;
}

.unit6-hero .lesson-hero-content * {
  max-width: 100%;
  min-width: 0;
}

.unit6-hero .lesson-hero-content h1,
.unit6-hero .lesson-hero-content p {
  overflow-wrap: break-word;
}

.unit6-hero .lesson-hero-content p,
.unit6-hero .eyebrow {
  color: #fff;
}

.unit6-hero .lesson-hero-content .eyebrow {
  color: var(--u6-navy) !important;
  background: rgba(255, 255, 255, 0.94);
}

.unit6-page {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0 4rem;
}

.unit6-toolbar {
  position: relative;
  z-index: 1;
  margin: 0 0 1.5rem;
  padding: 1.35rem max(24px, calc((100vw - 1360px) / 2));
  border: 0;
  border-bottom: 1px solid var(--u6-border);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.unit6-toolbar h2 {
  margin: 0 0 0.75rem;
  color: var(--u6-navy);
  font-size: 1rem;
}

.unit6-topic-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.55rem;
}

.unit6-topic-button,
.unit6-toggle-button,
.speed-button {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.58rem 0.8rem;
  font: inherit;
  font-weight: 900;
  line-height: 1.15;
  text-align: center;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.unit6-topic-button {
  background: var(--u6-navy);
  color: #fff;
}

.unit6-toggle-button {
  border-color: var(--u6-border);
  background: var(--u6-blue-soft);
  color: var(--u6-navy);
}

.unit6-topic-button:hover,
.unit6-toggle-button:hover,
.speed-button:hover {
  transform: translateY(-1px);
}

.unit6-topic-button:focus-visible,
.unit6-toggle-button:focus-visible,
.speed-button:focus-visible,
.unit6-section summary:focus-visible {
  outline: 3px solid rgba(217, 164, 65, 0.7);
  outline-offset: 3px;
}

.unit6-section {
  margin-bottom: 0;
  overflow: hidden;
  scroll-margin-top: 1rem;
  border: 0;
  border-top: 1px solid var(--u6-border);
  background: var(--u6-paper);
  box-shadow: none;
}

.unit6-section:nth-of-type(odd) {
  background: var(--u6-blue-soft);
}

.unit6-section:nth-of-type(even) {
  background: var(--u6-soft);
}

.unit6-section summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: min(1360px, calc(100% - 48px));
  margin: 0 auto;
  padding: 1.35rem 0;
  list-style: none;
  cursor: pointer;
  background: transparent;
}

.unit6-section summary::-webkit-details-marker {
  display: none;
}

.summary-copy {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}

.summary-copy > span {
  color: var(--u6-green-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.summary-copy h2 {
  margin: 0;
  color: var(--u6-navy);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  letter-spacing: 0;
}

.summary-copy p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.55;
}

.summary-icon {
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--u6-gold-soft);
  color: var(--u6-navy);
  font-weight: 900;
  transition: transform 180ms ease, background-color 180ms ease;
}

.unit6-section[open] .summary-icon {
  transform: rotate(45deg);
  background: var(--u6-gold);
}

.unit6-section[open] .section-body {
  animation: unit6-reveal 210ms ease-out;
}

@keyframes unit6-reveal {
  from { opacity: 0; transform: translateY(-7px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-body {
  display: grid;
  gap: 1.2rem;
  width: min(1360px, calc(100% - 48px));
  margin: 0 auto;
  padding: 0 0 1.5rem;
}

.unit6-grid,
.contrast-grid,
.form-grid,
.response-grid,
.calendar-grid,
.expression-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.unit6-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 1rem;
  align-items: start;
}

.unit6-two-col > * {
  min-width: 0;
}

.explain-card,
.grammar-card,
.model-card,
.contrast-card,
.response-card,
.expression-item,
.visual-card,
.audio-model {
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.explain-card,
.grammar-card,
.model-card,
.contrast-card,
.response-card,
.expression-item {
  padding: 1rem;
}

.explain-card h3,
.grammar-card h3,
.model-card h3,
.contrast-card h3,
.response-card h3,
.expression-item h3,
.visual-card h3 {
  margin: 0.1rem 0 0.55rem;
  color: var(--u6-navy);
  letter-spacing: 0;
}

.explain-card p,
.grammar-card p,
.model-card p,
.contrast-card p,
.response-card p,
.expression-item p,
.visual-card p,
.explain-card li,
.grammar-card li,
.model-card li,
.expression-item li {
  color: var(--u6-muted);
  line-height: 1.65;
}

.explain-card p:first-of-type,
.grammar-card p:first-of-type,
.model-card p:first-of-type {
  margin-top: 0;
}

.visual-card {
  position: relative !important;
  inset: auto !important;
  display: block;
  max-width: 100%;
  margin: 0;
  overflow: hidden;
  box-shadow: none;
}

.visual-card img {
  width: 100%;
  max-width: 100%;
  height: 250px;
  display: block;
  object-fit: cover;
}

.visual-card > div {
  padding: 1rem;
}

.visual-card p {
  margin: 0;
}

.official-map {
  width: 100%;
  overflow: hidden;
  border-collapse: collapse;
  border-radius: 8px;
  background: #fff;
}

.official-map th,
.official-map td {
  padding: 0.85rem;
  border: 1px solid var(--u6-border);
  color: #334155;
  line-height: 1.55;
  text-align: left;
  vertical-align: top;
}

.official-map th {
  background: var(--u6-soft);
  color: var(--u6-navy);
}

.formula {
  padding: 0.85rem;
  border-radius: 8px;
  background: var(--u6-navy);
  color: #fff;
  font-weight: 900;
  line-height: 1.55;
}

.example-list {
  display: grid;
  gap: 0.55rem;
  margin: 0.85rem 0 0;
}

.example-line {
  padding: 0.75rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #f8fbff;
  color: #26374f;
  line-height: 1.58;
}

.example-line strong {
  color: var(--u6-navy);
}

.meaning-tag {
  display: inline-flex;
  margin-bottom: 0.5rem;
  padding: 0.34rem 0.58rem;
  border-radius: 999px;
  background: var(--u6-soft);
  color: var(--u6-green-dark);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.mistake-pair {
  display: grid;
  gap: 0.55rem;
}

.mistake-box,
.ok-box,
.reason-box {
  padding: 0.85rem;
  border-radius: 8px;
  line-height: 1.6;
}

.mistake-box {
  border: 1px solid #fecaca;
  background: #fff1f2;
  color: #7f1d1d;
}

.ok-box {
  border: 1px solid #86efac;
  background: #ecfdf5;
  color: #064e3b;
}

.reason-box {
  border: 1px solid #bfd5ee;
  background: #eff6ff;
  color: #173a68;
}

.decision-map,
.discourse-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
}

.future-timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.timeline-node {
  position: relative;
  min-height: 190px;
  padding: 1rem;
  border-right: 1px solid var(--u6-border);
}

.timeline-node:last-child {
  border-right: 0;
}

.timeline-node::before {
  content: "";
  position: absolute;
  top: 3.15rem;
  left: 1rem;
  right: 1rem;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--u6-green), var(--u6-gold));
}

.timeline-node::after {
  content: "";
  position: absolute;
  top: 2.82rem;
  left: 1rem;
  width: 0.75rem;
  height: 0.75rem;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--u6-coral);
  box-shadow: 0 0 0 2px rgba(207, 74, 68, 0.22);
}

.timeline-node span,
.ladder-row span,
.language-bank span,
.arrangement-evidence span {
  display: inline-flex;
  margin-bottom: 0.55rem;
  color: var(--u6-coral);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.timeline-node h3 {
  margin: 2.6rem 0 0.45rem;
  color: var(--u6-navy);
  letter-spacing: 0;
}

.timeline-node p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.55;
}

.decision-step,
.flow-step {
  position: relative;
  min-height: 145px;
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.decision-step:not(:last-child)::after,
.flow-step:not(:last-child)::after {
  content: ">";
  position: absolute;
  top: 50%;
  right: -0.58rem;
  z-index: 2;
  width: 1.1rem;
  height: 1.1rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--u6-gold);
  color: var(--u6-navy);
  font-weight: 900;
  transform: translateY(-50%);
}

.decision-step span,
.flow-step span {
  display: inline-flex;
  margin-bottom: 0.45rem;
  color: var(--u6-coral);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.decision-step b,
.flow-step b {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--u6-navy);
}

.decision-step p,
.flow-step p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.55;
}

.strength-scale {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.strength-level {
  min-height: 130px;
  padding: 0.9rem;
  border-top: 8px solid var(--scale-color);
  border-radius: 6px;
  background: var(--scale-bg);
}

.strength-level:nth-child(1) { --scale-color: #4c8cc6; --scale-bg: #eff6ff; }
.strength-level:nth-child(2) { --scale-color: #2f9b79; --scale-bg: #ecfdf5; }
.strength-level:nth-child(3) { --scale-color: #d9a441; --scale-bg: #fff7e2; }
.strength-level:nth-child(4) { --scale-color: #cf4a44; --scale-bg: #fff1ef; }

.strength-level b {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--u6-navy);
}

.strength-level p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.5;
}

.advice-ladder {
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.ladder-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.28fr) minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
  padding: 0.85rem;
  border-left: 7px solid var(--ladder-color);
  border-radius: 6px;
  background: var(--ladder-bg);
}

.ladder-row.soft { --ladder-color: #4c8cc6; --ladder-bg: #eff6ff; }
.ladder-row.clear { --ladder-color: #2f9b79; --ladder-bg: #ecfdf5; }
.ladder-row.formal { --ladder-color: #d9a441; --ladder-bg: #fff7e2; }
.ladder-row.necessary { --ladder-color: #cf4a44; --ladder-bg: #fff1ef; }

.ladder-row span {
  margin: 0;
  color: var(--u6-navy);
}

.ladder-row p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.55;
}

.arrangement-evidence {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.arrangement-evidence > div,
.language-bank {
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.arrangement-evidence strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--u6-navy);
}

.arrangement-evidence p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.5;
}

.language-bank {
  display: grid;
  gap: 0.85rem;
}

.language-bank h3 {
  margin: 0;
  color: var(--u6-navy);
}

.language-bank-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.language-bank-grid > div {
  padding: 0.85rem;
  border-radius: 6px;
  background: var(--u6-blue-soft);
}

.language-bank p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.55;
}

.calendar-grid {
  grid-template-columns: 1fr 1fr;
}

.calendar-panel {
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #fff;
}

.calendar-panel h3 {
  margin: 0 0 0.75rem;
  color: var(--u6-navy);
}

.calendar-slots {
  display: grid;
  gap: 0.5rem;
}

.calendar-slot {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 0.65rem;
  align-items: center;
  padding: 0.65rem;
  border-radius: 6px;
  background: var(--u6-blue-soft);
  color: var(--u6-navy);
}

.calendar-slot.conflict {
  border-left: 6px solid var(--u6-coral);
  background: var(--u6-coral-soft);
}

.calendar-slot.resolved {
  border-left: 6px solid var(--u6-green);
  background: var(--u6-soft);
}

.calendar-slot time {
  font-weight: 900;
}

.calendar-slot span {
  min-width: 0;
  overflow-wrap: break-word;
}

.unit6-section[open] .calendar-slot.conflict {
  animation: unit6-conflict 520ms ease-out both;
}

.unit6-section[open] .calendar-slot.resolved {
  animation: unit6-resolved 420ms ease-out both;
}

@keyframes unit6-conflict {
  0% { box-shadow: inset 0 0 0 0 rgba(207, 74, 68, 0); }
  55% { box-shadow: inset 0 0 0 2px rgba(207, 74, 68, 0.42); }
  100% { box-shadow: inset 0 0 0 0 rgba(207, 74, 68, 0); }
}

@keyframes unit6-resolved {
  from { opacity: 0; transform: translateX(-7px); }
  to { opacity: 1; transform: translateX(0); }
}

.audio-model {
  display: grid;
  gap: 0.6rem;
  padding: 0.9rem;
  background: #edf9f5;
  border-color: rgba(23, 120, 95, 0.24);
}

.audio-model strong {
  color: var(--u6-navy);
}

.audio-model > span {
  color: var(--u6-muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.audio-model audio {
  width: 100%;
  min-width: 0;
}

.audio-speed-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.audio-speed-controls::before {
  content: "Speed";
  color: var(--u6-muted);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

.speed-button {
  min-height: 36px;
  padding: 0.38rem 0.64rem;
  border-color: rgba(7, 31, 79, 0.18);
  background: #fff;
  color: var(--u6-navy);
}

.speed-button.active {
  border-color: var(--u6-navy);
  background: var(--u6-navy);
  color: #fff;
}

.expression-item {
  display: grid;
  gap: 0.55rem;
}

.expression-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.expression-meta span {
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  background: var(--u6-soft);
  color: var(--u6-green-dark);
  font-size: 0.78rem;
  font-weight: 900;
}

.expression-item p,
.expression-item ul {
  margin: 0;
}

.expression-item ul {
  padding-left: 1.15rem;
}

.dialogue {
  display: grid;
  gap: 0.65rem;
}

.dialogue-line {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.8rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #f8fbff;
  color: var(--u6-muted);
  line-height: 1.58;
}

.dialogue-line b {
  color: var(--u6-navy);
}

.language-key {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.language-key span {
  padding: 0.42rem 0.65rem;
  border-radius: 999px;
  color: var(--u6-navy);
  font-size: 0.82rem;
  font-weight: 900;
}

.language-key span:nth-child(4n + 1) { background: var(--u6-blue-soft); }
.language-key span:nth-child(4n + 2) { background: var(--u6-soft); }
.language-key span:nth-child(4n + 3) { background: var(--u6-gold-soft); }
.language-key span:nth-child(4n + 4) { background: var(--u6-coral-soft); }

.teacher-boundary {
  padding: 1rem;
  border-left: 6px solid var(--u6-green);
  border-radius: 6px;
  background: var(--u6-soft);
  color: var(--u6-green-dark);
  line-height: 1.6;
}

.unit6-practice-bridge {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--u6-border);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 26px rgba(7, 31, 79, 0.08);
}

.unit6-practice-bridge h3 {
  margin: 0 0 0.35rem;
  color: var(--u6-navy);
  font-size: 1.18rem;
}

.unit6-practice-bridge p {
  margin: 0;
  color: var(--u6-muted);
  line-height: 1.5;
}

@media (max-width: 980px) {
  .unit6-two-col,
  .calendar-grid {
    grid-template-columns: 1fr;
  }

  .visual-card img {
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .decision-map,
  .discourse-flow,
  .strength-scale,
  .future-timeline,
  .arrangement-evidence,
  .language-bank-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .decision-step:nth-child(2)::after,
  .flow-step:nth-child(2)::after {
    display: none;
  }

  .timeline-node:nth-child(2) {
    border-right: 0;
  }

  .timeline-node:nth-child(-n + 2) {
    border-bottom: 1px solid var(--u6-border);
  }
}

@media (max-width: 680px) {
  .unit6-explanation-page .navbar {
    flex-direction: column;
    align-items: center;
    gap: 0.55rem;
    width: 100%;
    max-width: 100vw;
    padding: 8px 10px;
    overflow: hidden;
    box-sizing: border-box;
  }

  .unit6-explanation-page .brand img {
    height: 38px;
  }

  .unit6-explanation-page .nav-links {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
    max-width: 100% !important;
    gap: 6px !important;
    padding: 2px 0;
    overflow-x: hidden !important;
    box-sizing: border-box;
  }

  .unit6-explanation-page .nav-links li {
    min-width: 0 !important;
  }

  .unit6-explanation-page .nav-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 34px;
    padding: 0 8px;
    font-size: 0.76rem;
    line-height: 1.15;
    text-align: center;
    white-space: normal !important;
  }

  .unit6-explanation-page .global-course-switcher {
    position: static;
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    margin: 0.35rem 0 0.2rem;
    padding: 0 12px;
    box-sizing: border-box;
  }

  .unit6-explanation-page .global-course-switcher summary {
    min-height: 40px;
  }

  .unit6-explanation-page .global-course-switcher nav {
    right: auto;
    left: 50%;
    top: calc(100% + 0.5rem);
    bottom: auto;
    width: min(260px, calc(100vw - 24px));
    transform: translateX(-50%);
  }

  .unit6-explanation-page .jaralingua-auth {
    display: none !important;
  }

  .unit6-hero {
    display: block;
    width: 100vw;
    max-width: 100vw;
    margin: 0;
    padding: 36px 12px 40px;
  }

  .unit6-hero .lesson-hero-content {
    width: calc(100vw - 24px) !important;
    max-width: calc(100vw - 24px) !important;
    margin: 0 auto;
    padding: 26px 20px;
    border-radius: 24px;
    overflow: hidden;
  }

  .unit6-hero .lesson-hero-content h1 {
    font-size: clamp(1.85rem, 8.6vw, 2.35rem);
    line-height: 1.08;
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .unit6-hero .lesson-hero-content p {
    font-size: 0.98rem;
    line-height: 1.55;
  }

  .unit6-hero .lesson-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
    width: 100%;
  }

  .unit6-hero .lesson-meta span {
    justify-content: center;
    padding: 8px 10px;
    line-height: 1.15;
    text-align: center;
    white-space: normal;
  }

  .unit6-page {
    width: 100%;
    max-width: 100%;
    padding: 0 0 3rem;
  }

  .unit6-toolbar {
    padding: 1rem 10px;
  }

  .unit6-topic-buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
  }

  .unit6-topic-button,
  .unit6-toggle-button {
    min-height: 40px;
    padding: 0.5rem 0.56rem;
    font-size: 0.8rem;
  }

  .unit6-practice-bridge {
    grid-template-columns: 1fr;
  }

  .unit6-practice-bridge .btn {
    width: 100%;
    justify-content: center;
  }

  .unit6-section summary {
    gap: 0.7rem;
    width: calc(100% - 20px);
    padding: 1rem 0;
  }

  .summary-copy h2 {
    font-size: 1.22rem;
    line-height: 1.15;
  }

  .summary-copy p {
    font-size: 0.94rem;
  }

  .summary-icon {
    width: 2rem;
    height: 2rem;
  }

  .section-body {
    width: calc(100% - 20px);
    gap: 1rem;
    padding: 0 0 1.15rem;
  }

  .unit6-grid,
  .contrast-grid,
  .form-grid,
  .response-grid,
  .expression-grid,
  .decision-map,
  .discourse-flow,
  .strength-scale,
  .future-timeline,
  .arrangement-evidence,
  .language-bank-grid {
    grid-template-columns: 1fr;
  }

  .decision-step,
  .flow-step,
  .strength-level,
  .timeline-node {
    min-height: 0;
  }

  .decision-step::after,
  .flow-step::after {
    display: none !important;
  }

  .timeline-node {
    border-right: 0;
    border-bottom: 1px solid var(--u6-border);
  }

  .timeline-node:last-child {
    border-bottom: 0;
  }

  .timeline-node::before,
  .timeline-node::after {
    display: none;
  }

  .timeline-node h3 {
    margin-top: 0;
  }

  .ladder-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .official-map {
    display: block;
    border: 0;
    background: transparent;
  }

  .official-map thead {
    display: none;
  }

  .official-map tbody,
  .official-map tr,
  .official-map td {
    display: block;
    width: 100%;
  }

  .official-map tr {
    margin-bottom: 0.8rem;
    overflow: hidden;
    border: 1px solid var(--u6-border);
    border-radius: 8px;
    background: #fff;
  }

  .official-map td {
    padding: 0.8rem;
    border: 0;
    border-bottom: 1px solid var(--u6-border);
  }

  .official-map td:last-child {
    border-bottom: 0;
  }

  .official-map td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 0.25rem;
    color: var(--u6-green-dark);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
  }

  .dialogue-line {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .calendar-slot {
    grid-template-columns: 72px minmax(0, 1fr);
  }
}

@media (max-width: 420px) {
  .unit6-topic-buttons,
  .unit6-hero .lesson-meta {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .unit6-section[open] .section-body {
    animation: none;
  }

  .summary-icon,
  .unit6-topic-button,
  .unit6-toggle-button,
  .speed-button {
    transition: none;
  }

  .unit6-section[open] .calendar-slot.conflict,
  .unit6-section[open] .calendar-slot.resolved {
    animation: none;
  }
}