/* ==========================================================================
   Nasser Ibn Dawood Library — unified book page shell
   Works for RTL (ar) and LTR (en) via logical properties.
   ========================================================================== */

:root {
  --bp-ink: #1f2a37;
  --bp-muted: #5b6876;
  --bp-bg: #f6f4ed;
  --bp-card: #ffffff;
  --bp-line: #e3ded1;
  --bp-soft: #faf8f2;
  --bp-primary: #2c3e50;
  --bp-accent: #8e44ad;
  --bp-accent-2: #9b59b6;
  --bp-radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.bp {
  margin: 0;
  background: var(--bp-bg);
  color: var(--bp-ink);
  font: 17px/1.95 "Tajawal", "Segoe UI", Tahoma, system-ui, -apple-system, sans-serif;
  -webkit-text-size-adjust: 100%;
}

html[lang="en"] body.bp { font-size: 17.5px; line-height: 1.85; }

.bp a { color: #075a8c; }
.bp a:hover { color: var(--bp-accent); }

/* ---------- top navigation ---------- */
.bp-topbar {
  background: #101826;
  color: #cbd5e1;
  font-size: 0.9rem;
}
.bp-topbar-inner {
  max-width: 1020px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  justify-content: space-between;
}
.bp-topbar a { color: #e2e8f0; text-decoration: none; }
.bp-topbar a:hover { color: #fff; text-decoration: underline; }
.bp-topbar .bp-crumbs { display: flex; flex-wrap: wrap; gap: 6px 10px; opacity: 0.9; }
.bp-topbar .bp-crumbs span { opacity: 0.55; }

/* ---------- hero ---------- */
.bp-hero {
  background: linear-gradient(135deg, var(--bp-primary) 0%, var(--bp-accent) 100%);
  color: #fff;
  padding: clamp(30px, 5vw, 58px) 20px clamp(56px, 8vw, 84px);
}
.bp-hero-inner { max-width: 1020px; margin: 0 auto; }
.bp-kicker {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0 0 14px;
}
.bp-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.45;
  font-weight: 700;
}
.bp-lede {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: rgba(255, 255, 255, 0.94);
}

/* ---------- main card ---------- */
.bp-wrap { max-width: 1020px; margin: 0 auto; padding: 0 20px 64px; }

.bp-card {
  background: var(--bp-card);
  border: 1px solid var(--bp-line);
  border-radius: var(--bp-radius);
  padding: clamp(18px, 3vw, 30px);
  margin-top: clamp(-56px, -6vw, -40px);
  box-shadow: 0 18px 40px rgba(16, 24, 38, 0.1);
}

.bp-top {
  display: grid;
  grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  align-items: start;
}
.bp-cover {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--bp-line);
  box-shadow: 0 10px 24px rgba(16, 24, 38, 0.16);
  background: var(--bp-soft);
}

.bp-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 18px; }
.bp-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--bp-primary);
  color: var(--bp-primary);
  background: #fff;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.bp-btn:hover { transform: translateY(-1px); }
.bp-btn--solid { background: var(--bp-primary); color: #fff; }
.bp-btn--solid:hover { background: #1b2a38; color: #fff; }
.bp-btn--accent { background: var(--bp-accent); border-color: var(--bp-accent); color: #fff; }
.bp-btn--accent:hover { background: #7a3a95; color: #fff; }

/* ---------- facts ---------- */
.bp-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 10px;
}
.bp-fact {
  background: var(--bp-soft);
  border: 1px solid var(--bp-line);
  border-radius: 12px;
  padding: 10px 13px;
}
.bp-fact dt {
  margin: 0 0 3px;
  font-size: 0.76rem;
  letter-spacing: 0.01em;
  color: var(--bp-muted);
}
.bp-fact dd { margin: 0; font-weight: 700; font-size: 0.98rem; }

/* ---------- sections ---------- */
.bp-section { margin-top: clamp(30px, 4.5vw, 46px); }
.bp-section > h2 {
  margin: 0 0 14px;
  font-size: clamp(1.12rem, 2vw, 1.32rem);
  color: var(--bp-primary);
  border-inline-start: 4px solid var(--bp-accent);
  padding-inline-start: 12px;
  line-height: 1.5;
}
.bp-section > h2 .bp-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--bp-muted);
  margin-inline-start: 8px;
}

.bp-prose p { margin: 0 0 1.05em; }
.bp-prose p:last-child { margin-bottom: 0; }
.bp-note {
  font-size: 0.86rem;
  color: var(--bp-muted);
  margin: 12px 0 0;
}

/* ---------- table of contents ---------- */
.bp-toc { list-style: none; margin: 0; padding: 0; }
.bp-toc li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px dotted var(--bp-line);
}
.bp-toc li:last-child { border-bottom: 0; }
.bp-toc .bp-t {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}
.bp-toc .bp-pg {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--bp-muted);
  background: var(--bp-soft);
  border: 1px solid var(--bp-line);
  border-radius: 6px;
  padding: 0 7px;
  direction: ltr;
}
.bp-toc .d1 > .bp-t { font-weight: 700; color: var(--bp-primary); }
.bp-toc .d1 { margin-top: 12px; border-top: 1px solid var(--bp-line); padding-top: 10px; }
.bp-toc .d2 { padding-inline-start: 18px; }
.bp-toc .d3 { padding-inline-start: 38px; font-size: 0.96rem; }

.bp-chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.bp-chips li {
  background: #f1ecf8;
  color: #5b3a72;
  border: 1px solid #ddcfe9;
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.88rem;
}

/* ---------- quote ---------- */
.bp-quote {
  margin: 0;
  background: #f4f0fa;
  border-inline-start: 4px solid var(--bp-accent-2);
  border-radius: 12px;
  padding: 16px 20px;
  color: #33283d;
}
.bp-quote p { margin: 0; }
.bp-quote cite {
  display: block;
  margin-top: 10px;
  font-size: 0.84rem;
  font-style: normal;
  color: var(--bp-muted);
}

/* ---------- downloads & reader ---------- */
.bp-dl { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 6px; }
.bp-fmt {
  font-size: 0.78rem;
  color: var(--bp-muted);
  margin: 10px 0 0;
}

/* ---------- related ---------- */
.bp-related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.bp-related li {
  background: #fff;
  border: 1px solid var(--bp-line);
  border-radius: 12px;
  padding: 12px 14px;
}
.bp-related a { font-weight: 600; text-decoration: none; }
.bp-related a:hover { text-decoration: underline; }
.bp-related .bp-rn {
  display: block;
  font-size: 0.76rem;
  color: var(--bp-muted);
  margin-bottom: 3px;
}

/* ---------- footer ---------- */
.bp-footer {
  background: #101826;
  color: #cbd5e1;
  padding: 34px 20px;
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.9;
}
.bp-footer a { color: #a5c9f0; text-decoration: none; }
.bp-footer a:hover { text-decoration: underline; }
.bp-footer p { margin: 0 0 6px; }

/* ---------- responsive ---------- */
@media (max-width: 680px) {
  .bp-top { grid-template-columns: 1fr; }
  .bp-cover { max-width: 230px; margin-inline: auto; }
  .bp-card { margin-top: -28px; }
  .bp-toc li { gap: 8px; }
}

@media print {
  .bp-topbar, .bp-actions, .bp-footer, .bp-related, .bp-dl { display: none; }
  .bp-hero { background: none; color: #000; padding: 0 0 12px; }
  .bp-card { box-shadow: none; border: 0; margin: 0; padding: 0; }
}