:root {
  --bg: #f8f3e9;
  --surface: rgba(255, 252, 246, 0.9);
  --surface-strong: #fffdf8;
  --line: #e1d3bf;
  --ink: #1f2937;
  --muted: #667085;
  --blue: #e24a3b;
  --blue-soft: #fff0eb;
  --green: #0f766e;
  --green-soft: #e3f5ef;
  --amber: #b86f16;
  --amber-soft: #fff1c7;
  --coral: #c9342b;
  --coral-soft: #ffe4de;
  --violet: #7c3aed;
  --violet-soft: #efe7ff;
  --shadow: 0 18px 42px rgba(94, 64, 38, 0.13);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(rgba(31, 41, 55, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.065) 1px, transparent 1px),
    linear-gradient(135deg, #fffdf8 0%, var(--bg) 44%, #edf7f1 100%);
  background-size:
    34px 34px,
    34px 34px,
    auto;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 242, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 176px;
}

.brand img {
  width: 44px;
  height: 44px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 20px;
  line-height: 1;
}

.brand small {
  margin-top: 5px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.topnav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: var(--radius);
  color: #1f2937;
  font-size: 14px;
  font-weight: 800;
}

.topnav a.active,
.topnav a:hover {
  background: var(--blue-soft);
  color: var(--blue);
}

.top-actions,
.intro-actions,
.dialog-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    border-color 0.16s ease,
    background 0.16s ease;
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover,
.tool-card:hover,
.asset-tile:hover {
  transform: translateY(-1px);
}

.icon-button {
  width: 42px;
  height: 42px;
  color: var(--ink);
  background: var(--surface-strong);
}

.primary-button,
.secondary-button {
  min-height: 42px;
  gap: 8px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 900;
}

.primary-button {
  border-color: var(--blue);
  color: #ffffff;
  background: linear-gradient(180deg, #f0644d, var(--blue));
  box-shadow: 0 14px 28px rgba(226, 74, 59, 0.28);
}

.secondary-button {
  color: var(--ink);
  background: #fffaf1;
}

.app-shell {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
  gap: 24px;
  width: min(1200px, calc(100% - 48px));
  margin: 30px auto 64px;
}

.sidebar {
  position: sticky;
  top: 102px;
  align-self: start;
  display: grid;
  gap: 8px;
  padding: 18px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 241, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.eyebrow {
  color: #64748b;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.side-link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: #1f2937;
  background: transparent;
  cursor: pointer;
  font-weight: 900;
  text-align: left;
}

.side-link.active,
.side-link:hover {
  border-color: #f5b2a1;
  color: var(--blue);
  background: rgba(255, 240, 235, 0.92);
}

.content {
  min-width: 0;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 24px;
  align-items: center;
  min-height: 224px;
  padding: clamp(28px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(226, 74, 59, 0.08), transparent 28%),
    linear-gradient(135deg, rgba(255, 253, 248, 0.98), rgba(238, 247, 241, 0.9));
  box-shadow: var(--shadow);
}

.intro h1,
.section-heading h2,
.tool-dialog h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

.intro h1 {
  max-width: 720px;
  margin-top: 12px;
  font-size: clamp(38px, 5vw, 64px);
}

.intro p {
  max-width: 690px;
  margin: 18px 0 24px;
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.8;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 251, 242, 0.82);
}

.stat-strip div {
  min-height: 118px;
  padding: 22px 18px;
}

.stat-strip div + div {
  border-left: 1px solid var(--line);
}

.stat-strip strong {
  display: block;
  color: var(--blue);
  font-size: 34px;
}

.stat-strip div:nth-child(2) strong {
  color: var(--green);
}

.stat-strip div:nth-child(3) strong {
  color: var(--amber);
}

.stat-strip span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.5;
  word-break: keep-all;
}

.panel {
  margin-top: 24px;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 251, 244, 0.84);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.section-view {
  display: none;
}

.section-view.active {
  display: block;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.section-heading h2 {
  display: inline;
  margin-left: 12px;
  font-size: clamp(30px, 4vw, 46px);
  vertical-align: middle;
}

.section-heading p {
  margin: 14px 0 0;
  color: var(--muted);
  font-weight: 800;
  line-height: 1.7;
}

.mini-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  color: var(--blue);
  background: var(--blue-soft);
  vertical-align: middle;
}

.accent-green {
  color: var(--green);
  background: var(--green-soft);
}

.accent-amber {
  color: var(--amber);
  background: var(--amber-soft);
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.pill.green {
  color: var(--green);
  background: var(--green-soft);
}

.pill.amber {
  color: var(--amber);
  background: var(--amber-soft);
}

.controls {
  display: grid;
  gap: 14px;
  margin-bottom: 18px;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 50px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: #6b7280;
  background: #fffdf8;
}

.search-field input {
  width: 100%;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 800;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: #334155;
  background: rgba(255, 253, 248, 0.9);
  cursor: pointer;
  font-size: 14px;
  font-weight: 900;
}

.filter-chip.active,
.filter-chip:hover {
  border-color: #f5a491;
  color: var(--blue);
  background: var(--blue-soft);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.tool-section-stack,
.asset-stack {
  display: grid;
  gap: 18px;
}

.tool-section,
.asset-group {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.74);
}

.tool-section > header,
.asset-group > header {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
}

.tool-section > header > span,
.asset-group > header > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 900;
}

.asset-group > header > span {
  color: var(--green);
  background: var(--green-soft);
}

.tool-section h3,
.asset-group h3 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.25;
}

.tool-section > header p,
.asset-group > header p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.tool-section > header strong,
.asset-group > header strong {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 13px;
  white-space: nowrap;
}

.tool-section:nth-child(2n) > header > span,
.tool-section:nth-child(2n) > header strong {
  color: var(--green);
  background: var(--green-soft);
}

.tool-section:nth-child(3n) > header > span,
.tool-section:nth-child(3n) > header strong {
  color: var(--amber);
  background: var(--amber-soft);
}

.tool-card {
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  gap: 14px;
  min-height: 350px;
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: var(--radius);
  background: var(--surface-strong);
  box-shadow: 0 12px 26px rgba(94, 64, 38, 0.09);
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    border-color 0.16s ease;
}

.tool-card:hover {
  border-color: #edb19f;
  box-shadow: 0 16px 34px rgba(94, 64, 38, 0.14);
}

.tool-card:nth-child(2n) {
  border-top-color: var(--green);
}

.tool-card:nth-child(3n) {
  border-top-color: var(--amber);
}

.tool-card:nth-child(5n) {
  border-top-color: var(--violet);
}

.tool-card header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  color: var(--blue);
  background: var(--blue-soft);
  border: 1px solid transparent;
  font-weight: 900;
  overflow: hidden;
  position: relative;
}

.tool-icon.has-logo {
  background: #ffffff;
  border-color: var(--line);
}

.tool-icon img {
  display: block;
  width: 82%;
  height: 82%;
  object-fit: contain;
}

.tool-icon.has-logo .tool-initials {
  display: none;
}

.tool-card:nth-child(2n) .tool-icon {
  color: var(--green);
  background: var(--green-soft);
}

.tool-card:nth-child(3n) .tool-icon {
  color: var(--amber);
  background: var(--amber-soft);
}

.tool-card:nth-child(5n) .tool-icon {
  color: var(--violet);
  background: var(--violet-soft);
}

.tool-card h3 {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.25;
}

.card-kicker {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  color: #5f4d3f;
  background: #f7efe3;
  font-size: 12px;
  font-weight: 900;
}

.card-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 2px;
}

.card-action button {
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--blue);
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
}

.card-action a {
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.card-action span {
  color: #64748b;
  font-size: 12px;
  font-weight: 900;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-card__notes {
  display: grid;
  gap: 10px;
}

.tool-card__notes div {
  padding: 10px;
  border-radius: var(--radius);
  background: #fff8ec;
}

.tool-card__notes em,
.asset-license-line span,
.roadmap em {
  display: block;
  margin-bottom: 5px;
  color: #64748b;
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.asset-tile {
  min-height: 180px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  transition: transform 0.16s ease;
}

.asset-tile span {
  display: inline-flex;
  margin-bottom: 28px;
  color: #334155;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.asset-tile h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.asset-tile p {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
  line-height: 1.6;
}

.tone-mint {
  background: linear-gradient(160deg, #ffffff, var(--green-soft));
}

.tone-amber {
  background: linear-gradient(160deg, #ffffff, var(--amber-soft));
}

.tone-coral {
  background: linear-gradient(160deg, #ffffff, var(--coral-soft));
}

.tone-blue {
  background: linear-gradient(160deg, #ffffff, var(--blue-soft));
}

.asset-list {
  display: grid;
  gap: 10px;
}

.asset-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.34fr);
  gap: 16px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  box-shadow: 0 8px 18px rgba(94, 64, 38, 0.06);
}

.asset-main {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
}

.asset-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  color: var(--green);
  background: var(--green-soft);
  font-size: 13px;
  font-weight: 900;
}

.asset-title-line {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.asset-title-line strong {
  font-size: 16px;
}

.asset-link {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.asset-row p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.asset-license-line {
  padding-top: 8px;
  color: #344154;
}

.asset-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.asset-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  color: #355c58;
  background: var(--green-soft);
  font-size: 12px;
  font-weight: 900;
}

.asset-tags .is-risk {
  color: var(--coral);
  background: var(--coral-soft);
}

.lesson-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 16px;
  align-items: stretch;
  margin-bottom: 18px;
}

.lesson-intro > div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fffdf8, #fff5d8);
}

.lesson-intro span {
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lesson-intro h3 {
  margin: 10px 0 8px;
  font-size: 24px;
}

.lesson-intro p,
.lesson-stack span {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
  line-height: 1.7;
}

.lesson-stack {
  display: grid;
  align-content: center;
  gap: 8px;
}

.roadmap {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.roadmap li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  border-left: 4px solid var(--amber);
}

.roadmap li::before {
  content: counter(steps);
  grid-column: 1;
  grid-row: 1 / span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: var(--amber);
  background: var(--amber-soft);
  font-size: 18px;
  font-weight: 900;
}

.lesson-main {
  grid-column: 2;
  display: grid;
  grid-template-columns: minmax(130px, 0.55fr) minmax(180px, 0.8fr) minmax(260px, 1.55fr);
  gap: 18px;
  align-items: start;
}

.roadmap strong {
  color: var(--ink);
  font-size: 20px;
  line-height: 1.35;
}

.roadmap span {
  color: var(--muted);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
}

.roadmap p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.lesson-detail-grid {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.lesson-detail-grid > div {
  padding: 10px;
  border-radius: var(--radius);
  background: #fff6da;
}

.empty-result {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--surface-strong);
  font-weight: 800;
}

.tool-dialog {
  width: min(560px, calc(100% - 32px));
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--surface-strong);
  box-shadow: 0 30px 90px rgba(94, 64, 38, 0.28);
}

.tool-dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(8px);
}

.dialog-close {
  position: absolute;
  top: 16px;
  right: 16px;
}

.dialog-kicker {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.tool-dialog h2 {
  margin-top: 12px;
  font-size: 30px;
}

.tool-dialog p {
  margin: 14px 0;
  color: var(--muted);
  font-weight: 700;
  line-height: 1.7;
}

.prompt-box {
  margin: 18px 0;
  padding: 16px;
  border: 1px solid #ead2bb;
  border-radius: var(--radius);
  color: #3f3328;
  background: #fff8ec;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .topbar {
    flex-wrap: wrap;
  }

  .topnav {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sidebar .eyebrow {
    grid-column: 1 / -1;
  }

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

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

  .asset-row {
    grid-template-columns: 1fr;
  }

  .asset-tags {
    justify-content: flex-start;
  }

  .lesson-intro {
    grid-template-columns: 1fr;
  }

  .lesson-main {
    grid-template-columns: minmax(130px, 0.6fr) minmax(180px, 0.85fr) minmax(240px, 1.4fr);
  }

  .lesson-detail-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .top-actions {
    margin-left: auto;
  }

  .top-actions .primary-button {
    width: 42px;
    padding: 0;
    overflow: hidden;
    color: transparent;
    gap: 0;
  }

  .top-actions .primary-button svg {
    color: #ffffff;
  }

  .app-shell {
    width: min(100% - 28px, 1200px);
    margin-top: 18px;
  }

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

  .intro {
    padding: 24px;
  }

  .intro h1 {
    font-size: 36px;
  }

  .intro-actions,
  .dialog-actions,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .stat-strip,
  .tool-grid,
  .asset-grid {
    grid-template-columns: 1fr;
  }

  .tool-section,
  .asset-group {
    padding: 14px;
  }

  .tool-section > header,
  .asset-group > header {
    grid-template-columns: 38px minmax(0, 1fr);
  }

  .tool-section > header strong,
  .asset-group > header strong {
    grid-column: 2;
    justify-self: start;
  }

  .asset-main {
    grid-template-columns: 1fr;
  }

  .stat-strip div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section-heading h2 {
    display: block;
    margin: 12px 0 0;
    font-size: 34px;
  }

  .roadmap li {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .roadmap li::before {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .lesson-main,
  .lesson-detail-grid {
    grid-column: 2;
  }

  .lesson-main {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .lesson-detail-grid {
    grid-template-columns: 1fr;
  }
}