/**
 * ثهلان – حديث الكتب: تصميم مكتبة رقمية مريح وجذاب
 * يُحمّل بعد style.css و theme-premium.css
 */

/* ========== متغيرات خاصة بقسم الكتب ========== */
.books-lane {
  --books-bg: #EDE8E0;
  --books-bg-card: #FFFFFF;
  --books-border: rgba(54, 42, 32, 0.1);
  --books-shadow: 0 8px 32px rgba(45, 36, 25, 0.08);
  --books-shadow-hover: 0 16px 48px rgba(45, 36, 25, 0.14);
  --books-cover-radius: 8px;
  --books-accent: #A0522D;
  --books-accent-soft: rgba(160, 82, 45, 0.12);
}

[data-theme="dark"] .books-lane {
  --books-bg: #1E1C1A;
  --books-bg-card: #2D2A26;
  --books-border: rgba(255, 255, 255, 0.06);
  --books-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  --books-shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.4);
  --books-accent-soft: rgba(201, 123, 74, 0.2);
}

/* ========== حاوية القسم – أجواء مكتبة ========== */
.books-lane {
  background: var(--books-bg);
  margin-right: calc(-1 * (100vw - 100%) / 2 + (100vw - min(100vw, var(--container))) / 2);
  margin-left: calc(-1 * (100vw - 100%) / 2 + (100vw - min(100vw, var(--container))) / 2);
  padding: 2.5rem 20px 3rem;
  border-radius: 0;
  position: relative;
  transition: background 0.4s var(--ease);
}

.books-lane::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--books-border) 15%, var(--books-border) 85%, transparent 100%);
  opacity: 0.8;
}

.books-lane::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 5%;
  right: 5%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--books-accent-soft) 20%, var(--accent) 50%, var(--books-accent-soft) 80%, transparent);
  border-radius: 2px;
  opacity: 0.6;
}

/* ========== عنوان القسم ========== */
.books-lane > h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 1.85rem);
  color: var(--text);
  margin: 0 0 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.02em;
}

.books-icon {
  font-size: 1.25em;
  opacity: 0.9;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.books-lane .lane-intro {
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 56ch;
  margin: 0 0 2rem;
  padding-inline-end: 0;
}

/* ========== شبكة الكتب ========== */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 1.75rem;
  position: relative;
  z-index: 1;
}

/* ========== بطاقة الكتاب ========== */
.book-card {
  display: flex;
  flex-direction: column;
  background: var(--books-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--books-shadow);
  border: 1px solid var(--books-border);
  text-decoration: none;
  color: inherit;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s var(--ease);
}

.book-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--books-shadow-hover);
  border-color: var(--books-accent-soft);
}

.book-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* غلاف الكتاب – نسبة 2:3 (بورتريه) ========== */
.book-cover-wrap {
  position: relative;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: var(--primary-2);
}

.book-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease);
}

.book-card:hover .book-cover {
  transform: scale(1.04);
}

/* شريط نوع المحتوى (مناقشة / نبذة / غلاف) ========== */
.book-type {
  position: absolute;
  bottom: 0;
  right: 0;
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-radius: var(--books-cover-radius) 0 0 0;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  backdrop-filter: blur(6px);
}

.book-type-discuss {
  background: linear-gradient(135deg, #362A20 0%, #2D2419 100%);
  color: #fff;
}

.book-type-brief {
  background: linear-gradient(135deg, #A0522D 0%, #8B4513 100%);
  color: #fff;
}

.book-type-cover {
  background: linear-gradient(135deg, #C9A227 0%, #9A7209 100%);
  color: #fff;
}

/* معلومات الكتاب ========== */
.book-info {
  padding: 1.25rem 1.25rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.book-info h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s var(--ease);
}

.book-card:hover .book-info h4 {
  color: var(--primary-2);
}

.book-meta {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* تلميح «اقرأ المزيد» على بطاقة الكتاب ========== */
.book-card .book-info::after {
  content: 'اقرأ المزيد ←';
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
  padding-top: 0.5rem;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.book-card:hover .book-info::after,
.book-card:focus-visible .book-info::after {
  opacity: 1;
  transform: translateY(0);
}

/* ========== تتابع ظهور البطاقات ========== */
.books-lane.reveal.is-visible .book-card:nth-child(1) { transition-delay: 0s; }
.books-lane.reveal.is-visible .book-card:nth-child(2) { transition-delay: 0.1s; }
.books-lane.reveal.is-visible .book-card:nth-child(3) { transition-delay: 0.2s; }
.books-lane.reveal.is-visible .book-card:nth-child(4) { transition-delay: 0.3s; }
.books-lane.reveal.is-visible .book-card:nth-child(5) { transition-delay: 0.4s; }
.books-lane.reveal.is-visible .book-card:nth-child(6) { transition-delay: 0.5s; }

/* ========== لمعان خفيف عند المرور (مثل wow.css للبطاقات) ========== */
.book-card {
  position: relative;
  overflow: hidden;
}

.book-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(105deg, transparent 0%, rgba(255,255,255,0.08) 40%, transparent 70%);
  transition: right 0.5s var(--ease);
  z-index: 0;
  pointer-events: none;
}

.book-card:hover::after {
  right: 100%;
}

.book-cover-wrap,
.book-info {
  position: relative;
  z-index: 1;
}

/* ========== هوامش على الشاشات الصغيرة ========== */
@media (max-width: 640px) {
  .books-lane {
    padding: 1.75rem 16px 2.5rem;
  }

  .books-lane .lane-intro {
    margin-bottom: 1.5rem;
  }

  .books-grid {
    gap: 1.25rem;
  }

  .book-info {
    padding: 1rem 1rem 1.25rem;
  }

  .book-info h4 {
    font-size: 1rem;
  }
}