/* Front page composition */

.cn-home {
  overflow-x: clip;
}

/* —— Hero: one composition, full-bleed visual —— */
.cn-hero {
  position: relative;
  min-height: min(92vh, 820px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: stretch;
}

.cn-hero__visual {
  position: relative;
  min-height: 320px;
  background:
    linear-gradient(90deg, rgba(42, 24, 16, 0.35) 0%, transparent 42%),
    var(--cn-hero-image) center / cover no-repeat;
  animation: cn-hero-in 1.1s var(--cn-ease) both;
}

.cn-hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1.25rem, 4vw, 3.5rem);
  background:
    linear-gradient(165deg, rgba(247, 241, 228, 0.96) 0%, rgba(244, 234, 216, 0.92) 100%);
  animation: cn-copy-in 0.9s 0.12s var(--cn-ease) both;
}

.cn-hero__brand {
  display: block;
  margin: 0 0 1.15rem;
  max-width: min(100%, 22rem);
}

.cn-hero__wordmark {
  width: min(100%, 22rem);
  height: auto;
  display: block;
  filter: drop-shadow(0 8px 20px rgba(28, 53, 48, 0.08));
}

.cn-hero__title {
  margin: 0 0 0.85rem;
  font-family: var(--cn-font-display);
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--cn-ink);
  max-width: 16ch;
}

.cn-hero__lead {
  margin: 0 0 1.6rem;
  max-width: 28ch;
  color: var(--cn-ink-soft);
  font-size: 1.05rem;
  line-height: 1.55;
}

.cn-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.cn-search--hero {
  width: min(100%, 28rem);
  margin-top: 1.1rem;
}

@keyframes cn-hero-in {
  from {
    opacity: 0;
    transform: scale(1.04);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes cn-copy-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— Sections —— */
.cn-section__head {
  max-width: var(--cn-max);
  margin: 0 auto 1.75rem;
  padding: 0 1.25rem;
}

.cn-section__head h2 {
  margin: 0 0 0.4rem;
  font-family: var(--cn-font-display);
  font-size: clamp(1.55rem, 2.5vw, 2rem);
  letter-spacing: -0.02em;
}

.cn-section__head p {
  margin: 0;
  color: var(--cn-ink-soft);
  max-width: 36rem;
}

.cn-grades,
.cn-shelf,
.cn-guide {
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.cn-grades {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.55) 30%, transparent);
}

.cn-grade-grid {
  max-width: var(--cn-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.cn-grade {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 1rem 1.1rem;
  text-decoration: none;
  color: inherit;
  border-radius: var(--cn-radius);
  border: 1.5px solid transparent;
  background: rgba(255, 255, 255, 0.55);
  transition:
    transform 0.3s var(--cn-ease),
    border-color 0.25s ease,
    background 0.25s ease;
}

.cn-grade:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 122, 95, 0.35);
  background: var(--cn-white);
  color: inherit;
}

.cn-grade__head {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.cn-grade__label {
  font-family: var(--cn-font-display);
  font-size: 1.2rem;
  color: var(--cn-leaf-deep);
}

.cn-grade__hint {
  font-size: 0.85rem;
  color: var(--cn-ink-soft);
}

.cn-grade__book {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  text-decoration: none;
  color: inherit;
  flex: 1;
}

.cn-grade__book:hover {
  color: inherit;
}

.cn-grade__cover {
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(145deg, #d7ebe3, #c5dce8);
  box-shadow: 0 8px 22px rgba(28, 53, 48, 0.08);
  transition: transform 0.35s var(--cn-ease);
}

.cn-grade__book:hover .cn-grade__cover {
  transform: translateY(-3px) rotate(-0.5deg);
}

.cn-grade__cover img,
.cn-grade__placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cn-grade__placeholder {
  background: linear-gradient(145deg, #d7ebe3, #c5dce8);
}

.cn-grade__title {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cn-grade__more,
.cn-grade__archive,
.cn-grade__empty {
  font-size: 0.86rem;
  color: var(--cn-leaf-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
}

.cn-grade__archive {
  color: var(--cn-ink-soft);
  font-size: 0.82rem;
}

.cn-grade__more:hover,
.cn-grade__archive:hover,
.cn-grade__empty:hover {
  border-bottom-color: currentColor;
}

/* Book shelf — interactive list of posts */
.cn-shelf__rail {
  max-width: var(--cn-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem 1rem;
}

.cn-book__link {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.cn-book__link:hover {
  color: inherit;
}

.cn-book__cover {
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(145deg, #d7ebe3, #c5dce8);
  box-shadow: 0 10px 28px rgba(28, 53, 48, 0.08);
  transition: transform 0.35s var(--cn-ease);
}

.cn-book__link:hover .cn-book__cover {
  transform: translateY(-4px) rotate(-0.6deg);
}

.cn-book__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cn-book__placeholder {
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 30% 25%, rgba(232, 184, 74, 0.35), transparent 45%),
    linear-gradient(160deg, #cfe6dc, #b9d4e4);
}

.cn-book__cat {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cn-sky);
}

.cn-book__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cn-book__excerpt {
  margin: 0;
  font-size: 0.88rem;
  color: var(--cn-ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* About site */
.cn-about {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.cn-about__inner {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  text-align: center;
}

.cn-about__inner h2 {
  margin: 0 0 0.85rem;
  font-family: var(--cn-font-display);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
}

.cn-about__inner p {
  margin: 0 0 0.85rem;
  color: var(--cn-ink-soft);
  line-height: 1.7;
}

.cn-about__inner a {
  color: var(--cn-leaf);
  font-weight: 600;
}

/* Guide */
.cn-guide {
  padding-bottom: clamp(4rem, 9vw, 6rem);
}

.cn-guide__inner {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  text-align: center;
}

.cn-guide__inner h2 {
  margin: 0 0 0.75rem;
  font-family: var(--cn-font-display);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
}

.cn-guide__inner > p {
  margin: 0 auto;
  color: var(--cn-ink-soft);
  max-width: 34rem;
}

.cn-guide .cn-search {
  margin-left: auto;
  margin-right: auto;
}

/* Reveal on scroll */
.cn-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--cn-ease), transform 0.7s var(--cn-ease);
}

.cn-reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (max-width: 960px) {
  .cn-shelf__rail {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 800px) {
  .cn-hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .cn-hero__visual {
    min-height: 42vh;
    order: -1;
  }

  .cn-hero__title {
    max-width: none;
  }

  .cn-grade-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cn-shelf__rail {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .cn-hero__visual {
    min-height: min(26vh, 220px);
  }

  .cn-hero__brand {
    display: none;
  }

  .cn-hero__copy {
    padding:
      1.25rem
      max(1rem, env(safe-area-inset-right))
      1.5rem
      max(1rem, env(safe-area-inset-left));
  }

  .cn-hero__title {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    word-break: keep-all;
  }

  .cn-hero__lead {
    max-width: none;
    margin-bottom: 1rem;
    font-size: 0.98rem;
    word-break: keep-all;
  }

  .cn-hero__cta .cn-btn {
    flex: 1 1 0;
  }

  .cn-search--hero {
    width: 100%;
    margin-top: 0.85rem;
  }

  .cn-grades,
  .cn-shelf,
  .cn-guide {
    padding: 2rem 0;
  }

  .cn-section__head {
    margin-bottom: 1rem;
    padding: 0 max(1rem, env(safe-area-inset-left));
  }

  .cn-section__head h2 {
    font-size: 1.4rem;
  }

  .cn-section__head p {
    font-size: 0.92rem;
    word-break: keep-all;
  }

  .cn-grade-grid {
    grid-template-columns: 1fr;
    gap: 0.6rem;
    padding: 0 max(0.85rem, env(safe-area-inset-left));
  }

  .cn-grade {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.45rem 0.9rem;
    align-items: center;
    padding: 0.8rem 0.9rem;
    background: rgba(255, 255, 255, 0.72);
    border-color: rgba(47, 122, 95, 0.1);
  }

  .cn-grade:hover {
    transform: none;
  }

  .cn-grade__head {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: baseline;
    gap: 0.55rem;
  }

  .cn-grade__label {
    font-size: 1.1rem;
  }

  .cn-grade__hint {
    font-size: 0.8rem;
  }

  .cn-grade__book {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    gap: 0.85rem;
  }

  .cn-grade__cover {
    flex: 0 0 64px;
    width: 64px;
    border-radius: 8px;
  }

  .cn-grade__book:hover .cn-grade__cover {
    transform: none;
  }

  .cn-grade__title {
    font-size: 0.95rem;
    -webkit-line-clamp: 3;
    word-break: keep-all;
  }

  .cn-grade__more,
  .cn-grade__archive,
  .cn-grade__empty {
    display: inline-flex;
    align-items: center;
    min-height: 2.5rem;
  }

  .cn-grade__empty {
    grid-column: 1 / -1;
  }

  .cn-shelf__rail {
    gap: 1rem 0.75rem;
    padding: 0 max(0.85rem, env(safe-area-inset-left));
  }

  .cn-book__title {
    font-size: 0.95rem;
    word-break: keep-all;
  }

  .cn-book__excerpt {
    display: none;
  }

  .cn-about {
    padding: 2rem 0;
  }

  .cn-about__inner,
  .cn-guide__inner {
    padding: 0 max(1rem, env(safe-area-inset-left));
    word-break: keep-all;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cn-hero__visual,
  .cn-hero__copy,
  .cn-reveal,
  .cn-book__cover,
  .cn-grade,
  .cn-btn {
    animation: none !important;
    transition: none !important;
  }
}