.lesson2-3-page {
  min-height: 100vh;
  background: linear-gradient(180deg, var(--color-bg) 0%, #eef4f1 100%);
}

.lesson2-3-page .navbar {
  direction: ltr;
}

.lesson2-3-page .nav-menu {
  direction: ltr;
}

.l23-main {
  padding: clamp(1rem, 3vw, 1.5rem) 0 clamp(3rem, 8vw, 5rem);
}

.l23-container {
  max-width: min(100%, 980px);
}

.l23-card,
.l23-hero h1,
.l23-lead,
.l23-card p,
.l23-list li,
.l23-download-row .btn {
  word-break: normal;
  overflow-wrap: anywhere;
}

.l23-back {
  margin: 0 0 1rem;
  text-align: left;
  direction: ltr;
}

.l23-back a {
  font-size: 0.95rem;
  font-weight: 600;
}

.l23-hero {
  margin-bottom: 1.2rem;
}

.l23-kicker {
  margin: 0 0 0.5rem;
  color: #2d6b56;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: left;
  direction: ltr;
}

.l23-hero h1 {
  margin: 0 0 0.6rem;
  color: #1b2b25;
  font-size: clamp(1.5rem, 3.8vw, 2.1rem);
  line-height: 1.35;
}

.l23-lead {
  margin: 0;
  color: #4f6760;
  line-height: 1.9;
}

.l23-card {
  margin-top: 1rem;
  padding: clamp(1rem, 2.8vw, 1.4rem);
  border: 1px solid rgba(28, 58, 48, 0.12);
  border-radius: 16px;
  background: #f5f9f7;
  box-shadow: 0 4px 14px rgba(28, 58, 48, 0.06);
}

.l23-card h2,
.l23-card h3 {
  margin: 0 0 0.8rem;
  color: #1f322b;
}

.l23-card p {
  margin: 0 0 0.75rem;
  color: #2f443d;
  line-height: 1.95;
}

.l23-list {
  margin: 0.2rem 0 0;
  padding-right: 1.25rem;
  color: #2f443d;
}

.l23-list li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
}

.l23-list--ordered {
  padding-right: 1.4rem;
}

.l23-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

/* Soft section palette */
.l23-container > section.l23-card:nth-of-type(1) {
  background: #f0f7ff;
  border-color: rgba(73, 117, 160, 0.18);
}

.l23-container > section.l23-card:nth-of-type(2) {
  background: #f6f2ff;
  border-color: rgba(112, 93, 164, 0.18);
}

.l23-container > section.l23-card:nth-of-type(3) {
  background: #f2fbf6;
  border-color: rgba(64, 130, 97, 0.18);
}

.l23-container > section.l23-card:nth-of-type(4) {
  background: #fff8ee;
  border-color: rgba(181, 125, 55, 0.2);
}

.l23-grid .l23-card:first-child {
  background: #eefaf8;
  border-color: rgba(59, 132, 123, 0.2);
}

.l23-grid .l23-card:last-child {
  background: #fdf5ff;
  border-color: rgba(148, 98, 171, 0.2);
}

.l23-download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.85rem;
}

.l23-download-row .btn {
  position: relative;
  overflow: hidden;
  transition: transform 220ms ease, box-shadow 220ms ease, filter 220ms ease;
  animation: l23-btn-in 420ms ease both;
  white-space: normal;
}

.l23-download-row .btn:nth-child(2) {
  animation-delay: 90ms;
}

.l23-download-row .btn::before {
  content: "";
  position: absolute;
  top: -120%;
  left: -30%;
  width: 42%;
  height: 300%;
  transform: rotate(22deg);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.42) 45%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
  transition: left 420ms ease;
}

.l23-download-row .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(28, 58, 48, 0.16);
  filter: brightness(1.02);
}

.l23-download-row .btn:hover::before {
  left: 125%;
}

.l23-download-row .btn:active {
  transform: translateY(0);
}

.l23-download-row .btn:focus-visible {
  outline: 2px solid #2d6b56;
  outline-offset: 3px;
}

.l23-guide {
  margin-top: 0.85rem;
  padding: 0.8rem 0.95rem;
  border-radius: 12px;
  border: 1px dashed rgba(28, 58, 48, 0.22);
  background: #edf7f1;
}

.l23-download-row .btn.is-downloaded {
  transform: translateY(1px);
  filter: brightness(1.05);
}

@keyframes l23-btn-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 992px) {
  .l23-main {
    padding-bottom: 3rem;
  }

  .l23-container {
    max-width: 92vw;
  }

  .l23-card {
    border-radius: 14px;
    padding: 1rem 1.05rem;
  }

  .l23-card h2,
  .l23-card h3 {
    font-size: 1.05rem;
    line-height: 1.55;
  }
}

@media (max-width: 760px) {
  .l23-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .l23-main {
    padding: 0.75rem 0 2.25rem;
  }

  .l23-container {
    max-width: 100%;
    padding-inline: 0.8rem;
  }

  .l23-back {
    margin-bottom: 0.7rem;
  }

  .l23-hero h1 {
    font-size: clamp(1.25rem, 6vw, 1.55rem);
    line-height: 1.5;
  }

  .l23-kicker {
    font-size: 0.8rem;
    margin-bottom: 0.35rem;
  }

  .l23-lead,
  .l23-card p,
  .l23-list li {
    line-height: 1.8;
    font-size: 0.95rem;
  }

  .l23-card {
    margin-top: 0.8rem;
    padding: 0.9rem 0.9rem;
    border-radius: 12px;
  }

  .l23-card h2,
  .l23-card h3 {
    margin-bottom: 0.6rem;
    font-size: 1rem;
  }

  .l23-download-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.55rem;
  }

  .l23-download-row .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
    padding: 0.72rem 0.95rem;
    min-height: 50px;
    font-size: 0.95rem;
  }

  .l23-download-row .btn::before {
    display: none;
  }

  .l23-list {
    padding-right: 1rem;
  }

  .l23-list--ordered {
    padding-right: 1.15rem;
  }

  .l23-guide {
    margin-top: 0.7rem;
    padding: 0.7rem 0.8rem;
    border-radius: 10px;
  }
}

@media (max-width: 480px) {
  .l23-main {
    padding-top: 0.55rem;
  }

  .l23-container {
    padding-inline: 0.65rem;
  }

  .l23-hero h1 {
    font-size: clamp(1.1rem, 6.4vw, 1.35rem);
  }

  .l23-lead,
  .l23-card p,
  .l23-list li {
    font-size: 0.92rem;
  }

  .l23-download-row .btn {
    min-height: 48px;
    padding-inline: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .l23-download-row .btn {
    animation: none;
    transition: none;
  }
}