body.landing-tutorial-open {
  overflow: hidden;
}

.landing-tutorial-backdrop[hidden],
.landing-tutorial-step[hidden] {
  display: none !important;
}

.landing-tutorial-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.landing-tutorial-launcher {
  position: fixed;
  right: 92px;
  bottom: 22px;
  z-index: 2147481900;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 2px solid var(--brand-navy-900);
  border-radius: 50%;
  background: var(--brand-accent-500);
  color: var(--brand-navy-900);
  box-shadow: 0 14px 30px rgba(11, 27, 52, 0.2);
  cursor: pointer;
  font: 900 23px/1 var(--font-sans);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.landing-tutorial-launcher:hover {
  transform: translateY(-2px);
  background: var(--brand-accent-400);
  box-shadow: 0 18px 34px rgba(11, 27, 52, 0.24);
}

.landing-tutorial-launcher:focus-visible,
.landing-tutorial-modal button:focus-visible,
.landing-tutorial-modal input:focus-visible {
  outline: 3px solid var(--brand-primary-300);
  outline-offset: 3px;
}

.landing-tutorial-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2147482600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 18, 34, 0.68);
}

.landing-tutorial-modal {
  width: min(760px, calc(100vw - 48px));
  max-height: calc(100dvh - 48px);
  overflow: auto;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-body);
  box-shadow: 0 24px 70px rgba(8, 18, 34, 0.32);
}

.landing-tutorial-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 30px 18px;
  border-bottom: 1px solid var(--divider);
}

.landing-tutorial-kicker {
  display: block;
  margin-bottom: 6px;
  color: var(--brand-primary-700);
  font-size: 13px;
  font-weight: 800;
}

.landing-tutorial-head h2 {
  margin: 0;
  color: var(--text-strong);
  font-size: 28px;
  line-height: 1.25;
}

.landing-tutorial-head p {
  margin: 8px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}

.landing-tutorial-close {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--text-body);
  cursor: pointer;
  font: 400 27px/1 var(--font-sans);
}

.landing-tutorial-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 30px 0;
}

.landing-tutorial-progress span {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 800;
}

.landing-tutorial-progress span.is-active {
  border-color: var(--brand-primary-600);
  background: var(--brand-primary-600);
  color: #fff;
}

.landing-tutorial-progress span.is-done {
  border-color: var(--brand-primary-300);
  background: var(--brand-primary-100);
  color: var(--brand-primary-700);
}

.landing-tutorial-progress i {
  width: 72px;
  height: 2px;
  background: var(--border);
}

.landing-tutorial-body {
  padding: 22px 30px 30px;
}

.landing-tutorial-copy strong {
  color: var(--brand-primary-700);
  font-size: 12px;
}

.landing-tutorial-copy h3 {
  margin: 6px 0 8px;
  color: var(--text-strong);
  font-size: 22px;
  line-height: 1.35;
}

.landing-tutorial-copy p {
  margin: 0 0 18px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.landing-youtube-demo {
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #fff;
}

.landing-youtube-demo__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--divider);
}

.landing-youtube-demo__logo {
  color: #111;
  font-weight: 900;
}

.landing-youtube-demo__logo b {
  display: inline-grid;
  width: 27px;
  height: 19px;
  margin-right: 4px;
  place-items: center;
  border-radius: 5px;
  background: #ff0033;
  color: #fff;
  font-size: 9px;
}

.landing-youtube-demo__badge {
  padding: 3px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-secondary);
  font-size: 10px;
  font-weight: 800;
}

.landing-youtube-demo__search {
  max-width: 600px;
  display: flex;
  margin: auto;
  padding: 23px 23px 10px;
}

.landing-youtube-demo__search input {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--border-strong);
  border-radius: 999px 0 0 999px;
  padding: 12px 17px;
  font: inherit;
}

.landing-youtube-demo__search button {
  border: 1px solid var(--border-strong);
  border-left: 0;
  border-radius: 0 999px 999px 0;
  padding: 0 21px;
  background: var(--bg-alt);
  color: var(--text-body);
  cursor: pointer;
  font: 700 14px/1 var(--font-sans);
}

.landing-youtube-demo__hint {
  margin: 0;
  padding: 0 23px 20px;
  color: var(--text-tertiary);
  font-size: 12px;
  text-align: center;
}

.landing-youtube-demo__query {
  padding: 13px 16px;
  border-bottom: 1px solid var(--divider);
  background: var(--surface-2);
  color: var(--text-secondary);
  font-size: 13px;
}

.landing-youtube-result {
  display: grid;
  grid-template-columns: 178px minmax(0, 1fr);
  gap: 16px;
  padding: 15px;
  border-bottom: 1px solid var(--divider);
}

.landing-youtube-result:last-child {
  border-bottom: 0;
}

.landing-youtube-result__thumb {
  min-height: 100px;
  position: relative;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: #172033;
  color: #fff;
  font-size: 27px;
}

.landing-youtube-result__thumb small {
  position: absolute;
  right: 6px;
  bottom: 6px;
  padding: 2px 5px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.76);
  font-size: 10px;
}

.landing-youtube-result__meta h4 {
  margin: 2px 0 5px;
  color: var(--text-strong);
  font-size: 15px;
  line-height: 1.4;
}

.landing-youtube-result__meta p {
  margin: 0 0 10px;
  color: var(--text-secondary);
  font-size: 12px;
}

.landing-youtube-result__meta button {
  min-height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 0 11px;
  background: #fff;
  color: var(--text-body);
  cursor: pointer;
  font: 700 13px/1 var(--font-sans);
}

.landing-youtube-result__meta button.is-copied {
  border-color: var(--brand-primary-500);
  background: var(--brand-primary-50);
  color: var(--brand-primary-700);
}

.landing-tutorial-actions {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
}

.landing-tutorial-primary,
.landing-tutorial-secondary {
  min-height: 44px;
  border-radius: 8px;
  padding: 0 17px;
  cursor: pointer;
  font: 800 14px/1 var(--font-sans);
}

.landing-tutorial-primary {
  border: 1px solid var(--brand-primary-600);
  background: var(--brand-primary-600);
  color: #fff;
}

.landing-tutorial-primary:disabled {
  border-color: var(--border-strong);
  background: var(--border-strong);
  cursor: not-allowed;
}

.landing-tutorial-secondary {
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text-body);
}

.landing-tutorial-success {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px;
  border: 1px solid #91d5aa;
  border-radius: 8px;
  background: #effaf3;
}

.landing-tutorial-success__icon {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #198754;
  color: #fff;
  font-weight: 900;
}

.landing-tutorial-success b,
.landing-tutorial-success span {
  display: block;
}

.landing-tutorial-success b {
  color: var(--text-strong);
}

.landing-tutorial-success span {
  margin-top: 4px;
  color: var(--text-secondary);
  font-size: 12px;
}

.hero__lecture-input.is-tutorial-target {
  border-color: var(--brand-primary-500);
  box-shadow: 0 0 0 4px var(--brand-primary-100);
}

@media (max-width: 640px) {
  .landing-tutorial-launcher {
    right: 82px;
    bottom: 14px;
  }

  .landing-tutorial-backdrop {
    align-items: flex-end;
    padding: 10px;
  }

  .landing-tutorial-modal {
    width: 100%;
    max-height: calc(100dvh - 20px);
  }

  .landing-tutorial-head,
  .landing-tutorial-body {
    padding-left: 18px;
    padding-right: 18px;
  }

  .landing-tutorial-head h2 {
    font-size: 24px;
  }

  .landing-tutorial-copy h3 {
    font-size: 19px;
  }

  .landing-tutorial-progress i {
    width: 44px;
  }

  .landing-youtube-result {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 11px;
    padding: 12px;
  }

  .landing-youtube-result__thumb {
    min-height: 82px;
  }

  .landing-youtube-result__meta h4 {
    font-size: 13px;
  }

  .landing-tutorial-actions {
    align-items: stretch;
  }

  .landing-tutorial-primary,
  .landing-tutorial-secondary {
    white-space: normal;
  }
}