/* ========== Theme tokens ========== */
:root{
  --bg:#ffffff;
  --text:#0b0b0b;
  --muted:#6b7280;
  --card:#f5f5f7;
  --accent:#2563eb;
  --shadow:0 8px 24px rgba(0,0,0,.06);
  --radius:14px;

  /* Typography scales */
  --title-size: clamp(22px, 3vw, 34px);
  --tagline-size: clamp(12px, 2.2vw, 16px);
  --card-title-size: clamp(14px, 2vw, 18px);
}

.dark{
  --bg:#0f1115;
  --text:#f5f7fa;
  --muted:#9aa4b2;
  --card:#161a22;
  --accent:#60a5fa;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  line-height:1.6;
  transition: background .2s ease, color .2s ease;
}

/* ========== Header ========== */
header.site-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 20px;
  background:var(--card);
  box-shadow: var(--shadow);
  position:sticky;
  top:0;
  z-index:10;
}
.header-left{display:flex; flex-direction:column; gap:2px}
.site-title{
  margin:0;
  font-size: var(--title-size);
  font-weight:800;
  letter-spacing:.3px;
}
.tagline{
  margin:0;
  font-size: var(--tagline-size);
  color:var(--muted);
}
.header-right{display:flex; gap:10px; align-items:center}

/* Theme button */
#theme-toggle{
  border:none;
  background:var(--text);
  color:var(--bg);
  padding:10px 12px;
  border-radius:999px;
  cursor:pointer;
}

/* ========== Nav buttons ========== */
.nav-buttons {
  display: flex;
  gap: 10px;
  padding: 12px 20px;
  flex-wrap: wrap;
}

.nav-btn {
  display: inline-block;
  text-decoration: none;
  background: #0073aa;
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  transition: transform .15s ease, background .15s ease;
  font-size: 14px;
}

.nav-btn:hover {
  background: #005f8d;
  transform: translateY(-2px);
}

/* ========== Filter buttons ========== */
.filters{
  display:flex; gap:10px; padding:10px 20px; flex-wrap:wrap;
}
.filter-btn{
  border:none; background:var(--card); color:var(--text);
  padding:8px 12px; border-radius:10px; cursor:pointer;
}
.filter-btn.active, .filter-btn:hover{ background:var(--text); color:var(--bg);}

/* ========== Grid ========== */
.book-list{
  display:grid;
  gap:18px;
  padding:20px;
  grid-template-columns: repeat(2, 1fr); /* phones */
}
@media (min-width:700px){ .book-list{ grid-template-columns: repeat(3, 1fr);} } /* tablets */
@media (min-width:1024px){ .book-list{ grid-template-columns: repeat(4, 1fr);} } /* desktops */

/* ========== Cards ========== */
.book-card{
  display:block;
  background:var(--card);
  border-radius: var(--radius);
  overflow:hidden;
  text-decoration:none;
  color:inherit;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.book-card:hover{ transform: translateY(-3px); box-shadow:0 14px 32px rgba(0,0,0,.12); }
.book-card img{ width:100%; display:block; aspect-ratio: 2/3; object-fit: cover; }
.book-card h2{
  margin:10px 12px 14px;
  font-size: var(--card-title-size);
  font-weight:700;
  text-align:left; /* لا يتم توسيط العناوين */
}

/* category chips on cards (optional hidden on index for now) */
.card-chips{ display:flex; gap:8px; padding:0 12px 12px; flex-wrap:wrap;}
.chip{
  display:inline-block; font-size:12px; padding:4px 8px; border-radius:999px;
  background:rgba(99,102,241,.12); color:var(--text); text-decoration:none;
}

/* ========== Pagination ========== */
#pagination{ display:flex; gap:10px; justify-content:center; align-items:center; padding:10px 0 28px;}
#pagination button{
  padding:8px 12px; border:none; border-radius:10px; background:var(--card); color:var(--text); cursor:pointer;
}
#pagination button[disabled]{ opacity:.5; cursor:not-allowed }

/* ========== Content pages ========== */
.main-content{ max-width: 820px; margin: 26px auto; padding: 0 20px;}
.book-header{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:16px 20px; background:var(--card); box-shadow:var(--shadow);
}
.header-left h1{ margin:6px 0 0; font-size: clamp(22px, 4vw, 36px);}
.back-btn{ text-decoration:none; color:var(--text); background:var(--card); padding:8px 12px; border-radius:10px; }
.tag-row{ display:flex; gap:10px; flex-wrap:wrap; margin:0; }
.tag-row a{ text-decoration:none; padding:6px 10px; border-radius:999px; background:var(--card); color:var(--text); }
.tag-row a:hover{ background:var(--text); color:var(--bg); }

/* Paragraph rhythm */ 
.entry-content {
  line-height: 1.9;
  font-size: 18px; /* 📏 حجم الخط */
}

.narrow-container {
  max-width: 600px;
  margin: 1.5rem auto;
  background: var(--card);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

body {
  margin: 0;
  font-family: 'Times New Roman', Times, serif;
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

/* Base styles (Light mode) */
:root {
  --bg: #ffffff;
  --text: #000000;
  --input-bg: #f9f9f9;
  --input-border: #ccc;
}

/* Dark mode */
.dark {
  --bg: #121212;
  --text: #ffffff;
  --input-bg: #1e1e1e;
  --input-border: #555;
}

/* Search */
.search-container {
  text-align: center;
  margin: 1rem;
}

#searchBox {
  width: 60%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  font-size: 1rem;
  background-color: var(--input-bg);
  color: var(--text);
}


    .site-footer {
      background: #f0f0f0;
      padding: 20px 10px;
      margin-top: 40px;
      text-align: center;
      font-size: 14px;
      border-top: 1px solid #ddd;
    }
    .site-footer a {
      color: inherit;
      text-decoration: none;
      margin: 0 5px;
    }
    .site-footer a:hover {
      text-decoration: underline;
    }
    /* Dark mode support */
    .dark .site-footer {
      background: #1e1e1e;
      color: #fff;
      border-top: 1px solid #444;
    }

img, video, iframe {
  max-width: 100%;
  height: auto;
  display: block;
}


.main-content {
  padding: 1rem;
  word-wrap: break-word;
  overflow-x: hidden;
}

.narrow-container {
  max-width: 800px;
  margin: 1 auto;
  padding: 1 1rem;
}

p, h1, h2, h3, h4, h5, h6, ul, ol, blockquote {
  word-break: break-word;
}

/* Toggle button style */
#toggleFilters {
  display: block;
  margin: 10px 0 10px 20px;
  padding: 8px 14px;
  background: #0073aa;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background .2s ease, transform .2s ease;
}

#toggleFilters:hover {
  background: #005f8d;
  transform: translateY(-2px);
}

/* Hide filters by default on small screens */
.filters {
  display: none;
  margin-bottom: 15px;
}

.filters.show {
  display: block;
}

/* ========== General Action Buttons ========== */
.action-btn {
  background: #0073aa;
  color: #fff;
  padding: 10px 12px;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.3s ease, transform 0.2s ease;
}

.action-btn:hover {
  background: #005f8d;
  transform: translateY(-2px);
}

.action-btn:active {
  transform: translateY(0);
}

/* Share button */
.share-btn svg {
  stroke: white;
}

/* TOC toggle button */
#toc-toggle-btn svg {
  fill: #e3e3e3;
}

/* Bookmark button */
.bookmark-btn .icon-saved { display: none; }
.bookmark-btn.saved .icon-default { display: none !important; }
.bookmark-btn.saved .icon-saved { display: inline !important; }

/* ========== Bookmark Notification ========== */
#saveNotice {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1001;
  text-align: center;
  font-family: 'Times New Roman', serif;
  padding: 20px;
  border-radius: 8px;
  background: #fff;
  color: #222;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  width: 90%;
  max-width: 400px;
}

#saveNotice button {
  padding: 5px 15px;
  font-family: 'Times New Roman', serif;
  cursor: pointer;
}

/* ========== Table of Contents ========== */
#toc {
  position: fixed;
  top: 80px;
  left: 20px;
  width: 220px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  font-size: 14px;
  z-index: 9999;
  display: none;
}

#toc h3 {
  font-size: 16px;
  margin: 0;
}

#toc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  border-bottom: 1px solid #ccc;
  padding-bottom: 6px;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 10;
}

#toc-header button {
  background: none;
  border: none;
  font-size: 18px;
  font-weight: bold;
  color: #555;
  cursor: pointer;
  padding: 0 5px;
}

#toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#toc ul li {
  margin: 4px 0;
}

#toc ul a {
  text-decoration: none;
  color: #0077cc;
  cursor: pointer;
  transition: color 0.2s ease;
}

#toc ul a:hover {
  color: #0056b3;
}

/* ========== Dark Mode Support ========== */
@media (prefers-color-scheme: dark) {
  #saveNotice { background: #1e1e1e !important; color: #fff !important; }
  #toc { background: #1e1e1e; border-color: #444; }
  #toc h3, #toc a { color: #f1f1f1; }
  #toc-header { background: #1e1e1e; border-color: #444; }
  .action-btn { background: #2563eb; }
  .action-btn:hover { background: #1d4ed8; }
}

#pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
}

#pagination button {
  background: #444;
  color: #fff;
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
}

#pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#pagination span {
  color: #555;
  font-weight: bold;
}