/* ============================================================
   Deutsch Ecke — contents pages and the Written Book
   Loaded after theme.css. Covers the Picture Book contents
   grid, the Written Book chapter list, and the reading
   typography inside a chapter.
   ============================================================ */

/* ============================================================
   Shared page intro
   ============================================================ */

.premium .toc-intro {
  padding: 52px 0 10px;
  text-align: center;
}

.premium .toc-intro h1 {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 90;
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 3.2rem);
  line-height: 1.02;
  letter-spacing: -0.032em;
  margin: 0 0 12px;
}

.premium .toc-intro > p {
  color: var(--text-muted);
  max-width: 58ch;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.7;
}

.toc-kicker {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.toc-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 6px;
}

.toc-meta span {
  font-family: var(--ui);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text-muted);
  box-shadow: var(--shadow);
}

/* ============================================================
   Picture Book contents — thumbnail grid
   ============================================================ */

.contents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 20px;
  padding: 34px 0 60px;
  list-style: none;
  margin: 0;
}

.sheet-card {
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
  height: 100%;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.28s ease,
              border-color 0.28s ease;
}

a.sheet-card:hover {
  text-decoration: none;
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: 0 18px 38px color-mix(in srgb, var(--accent) 18%, transparent);
}

.sheet-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  max-width: 100%;
  overflow: hidden;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.sheet-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

a.sheet-card:hover .sheet-thumb img {
  transform: scale(1.05);
}

.sheet-num {
  position: absolute;
  top: 10px;
  left: 10px;
  min-width: 30px;
  height: 30px;
  padding: 0 9px;
  border-radius: 9px;
  background: var(--grad);
  color: #fff;
  font-family: var(--display);
  font-weight: 900;
  font-size: 0.86rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.28);
}

.sheet-body {
  padding: 15px 16px 17px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex-grow: 1;
}

.sheet-de {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 30;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.sheet-en {
  font-family: var(--ui);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.sheet-syl {
  margin-top: auto;
  padding-top: 9px;
  font-family: var(--ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ============================================================
   Written Book contents — chapter list
   ============================================================ */

.chapter-list {
  list-style: none;
  margin: 0;
  padding: 30px 0 60px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 12px;
}

.chapter-row {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px 17px;
  border-radius: 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
  height: 100%;
  transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.24s ease,
              border-color 0.24s ease;
}

a.chapter-row:hover {
  text-decoration: none;
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 16%, transparent);
}

.chapter-row .n {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "opsz" 30;
  font-weight: 900;
  font-size: 0.95rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 11%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  transition: background 0.24s ease, color 0.24s ease;
}

a.chapter-row:hover .n {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

.chapter-row .t {
  min-width: 0;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.chapter-row .t .de {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 30;
  font-weight: 700;
  font-size: 0.99rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--text);
  font-style: normal;
}

.chapter-row .t .en {
  font-family: var(--ui);
  font-size: 0.83rem;
  color: var(--text-muted);
  font-style: normal;
  line-height: 1.4;
}

.chapter-row .go {
  flex-shrink: 0;
  color: var(--text-muted);
  display: flex;
  transition: transform 0.24s ease, color 0.24s ease;
}

.chapter-row .go .icon-svg {
  width: 18px;
  height: 18px;
}

a.chapter-row:hover .go {
  color: var(--accent);
  transform: translateX(4px);
}

.chapter-row.not-ready {
  opacity: 0.5;
  pointer-events: none;
}

/* ============================================================
   Written Book — a chapter page
   ============================================================ */

.premium .book-header {
  padding: 46px 0 6px;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.premium .book-kicker {
  font-family: var(--ui);
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  font-weight: 800;
}

.premium .book-header h1 {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 90;
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 12px 0 8px;
}

.premium .book-header .subtitle {
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--text-muted);
}

.premium .image-link {
  margin: 30px auto 10px;
  max-width: 640px;
  border-radius: 16px;
  padding: 15px 20px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.24s ease,
              border-color 0.24s ease;
}

.premium .image-link:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 16%, transparent);
}

.premium .image-link .label {
  font-family: var(--ui);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2px;
}

.premium .image-link .cta {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "opsz" 30;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.015em;
  color: var(--text);
}

.premium .chapter-body {
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--ui);
  font-size: 1.04rem;
  line-height: 1.75;
  padding-top: 14px;
}

.premium .chapter-body h2 {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 50;
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: -0.024em;
  margin: 48px 0 16px;
  padding-bottom: 10px;
  border-bottom: none;
  position: relative;
}

.premium .chapter-body h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: var(--grad);
}

.premium .chapter-body h3 {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "opsz" 30;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  margin: 30px 0 10px;
}

.premium .chapter-body table {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  box-shadow: var(--shadow);
}

.premium .chapter-body th {
  font-family: var(--ui);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-raised));
  color: var(--text-muted);
  letter-spacing: 0.07em;
}

.premium .chapter-body th,
.premium .chapter-body td {
  padding: 11px 14px;
}

.premium .chapter-body tr:last-child td {
  border-bottom: none;
}

.premium .info-box {
  border-radius: 14px;
  border-left-width: 4px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.premium .info-box h3,
.premium .info-box h4 {
  font-family: var(--display);
  font-variation-settings: "SOFT" 30, "opsz" 30;
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: -0.015em;
}

.premium .de-word {
  font-weight: 700;
  color: var(--accent);
}

/* bottom chapter nav */
.premium .chapter-nav-bottom {
  max-width: 720px;
  margin: 30px auto 0;
  padding: 26px 0 10px;
}

.premium .chapter-nav-bottom .nav-btn,
.premium .chapter-jump select {
  font-family: var(--ui);
  border-radius: 12px;
  font-weight: 700;
}

.premium .chapter-nav-bottom .nav-btn {
  padding: 12px 18px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.premium .chapter-nav-bottom .nav-btn:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 14%, transparent);
}

.premium .chapter-jump select {
  padding: 10px 14px;
  max-width: 100%;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 760px) {
  .premium .toc-intro {
    padding: 36px 0 6px;
  }

  .contents-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
    padding: 26px 0 48px;
  }

  .sheet-body {
    padding: 12px 13px 14px;
  }

  .sheet-de {
    font-size: 0.92rem;
  }

  .sheet-en {
    font-size: 0.78rem;
  }

  .chapter-list {
    grid-template-columns: 1fr;
    padding: 24px 0 48px;
  }

  .premium .chapter-body {
    font-size: 1rem;
  }
}