:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #10b981;
    --accent-hover: #059669;
    --accent-secondary: #f59e0b;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --accent: #059669;
    --accent-hover: #047857;
    --accent-secondary: #d97706;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Cairo', 'Tajawal', sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    transition: var(--transition);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Navbar */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

[data-theme="light"] header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.navbar {
    max-width: 1350px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-theme, .btn-login {
    background: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}
.btn-theme-hover{
    background-color: #f8fafc;

}

.btn-login {
    background: var(--accent);
    color: #ffffff;
    border: none;
}

.btn-login:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(15, 23, 42, 0.95) 100%), url('https://images.unsplash.com/photo-1507842217343-583bb7270b66?auto=format&fit=crop&w=1600&q=80');
    background-size: cover;
    background-position: center;
    padding: 4.5rem 2rem;
    text-align: center;

}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Search Bar */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    display: flex;
}

.search-container input {
    width: 100%;
    padding: 1.1rem 1.5rem;
    padding-left: 60px;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: var(--bg-secondary);
    color: var(--text-main);
    font-size: 1.05rem;
    outline: none;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.search-container input:focus {
    border-color: var(--accent);
}

.search-container button {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.search-container button:hover {
    background: var(--accent-hover);
}

/* Main Container & Titles */
.main-container {
    max-width: 1350px;
    margin: 3rem auto;
    padding: 0 2rem;
    flex: 1;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.book-count-badge {
    background: var(--bg-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--accent);
    border: 1px solid rgba(255,255,255,0.05);
}

/* 🌟 تنسيق شبكة المؤلفين (Authors Grid CSS) 🌟 */
.authors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.author-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.author-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
}

.author-avatar-wrapper {
    width: 90px;
    height: 90px;
    margin-bottom: 1rem;
}

.author-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--accent);
}

.author-name {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.author-title {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.author-bio {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 1.2rem;
}

.author-footer {
    margin-top: auto;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding-top: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.author-stat.rating {
    color: var(--accent-secondary);
    font-weight: 700;
}

/* Categories & Filter */
.categories-filter {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 15px;
    margin-bottom: 2.5rem;
    scrollbar-width: thin;
}

.filter-btn {
    background: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.7rem 1.4rem;
    border-radius: 30px;
    cursor: pointer;
    white-space: nowrap;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-btn:hover, .filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Book Grid & Cards */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 2rem;
}

.book-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 30px -10px var(--accent);
}

.book-cover {
    height: 310px;
    width: 100%;
    object-fit: cover;
    background-color: var(--bg-secondary);
}

.book-info {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.book-badge {
    align-self: flex-start;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.book-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.book-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.book-rating {
    color: var(--accent-secondary);
    font-weight: 700;
    font-size: 0.9rem;
}

.btn-read {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.btn-read:hover {
    background: var(--accent-hover);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 3rem 2rem 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1350px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.footer-col p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-primary);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--accent);
    color: white;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Media Queries للهواتف والشاشات الصغيرة */
@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 1rem; }
    .hero h1 { font-size: 2.1rem; }
    .nav-links { width: 100%; justify-content: center; flex-wrap: wrap; }

    .authors-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
    }

    .author-card { padding: 1rem; }
    .author-avatar-wrapper { width: 70px; height: 70px; }
    .author-name { font-size: 1rem; }
    .author-bio { font-size: 0.78rem; margin-bottom: 0.8rem; }
}
/* قسم التعليقات داخل بطاقة الكتاب */
.comments-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed rgba(255, 255, 255, 0.1);
    text-align: right;
}

.comments-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
}

.comments-list {
    max-height: 120px;
    overflow-y: auto;
    margin-bottom: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-left: 4px;
}

.comment-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--text-main);
    line-height: 1.4;
    word-break: break-word;
}

[data-theme="light"] .comment-item {
    background: rgba(0, 0, 0, 0.05);
}

.comment-input-wrapper {
    display: flex;
    gap: 6px;
}

.comment-input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 6px 10px;
    color: var(--text-main);
    font-size: 0.85rem;
    outline: none;
}

.comment-input:focus {
    border-color: var(--accent);
}

.btn-add-comment {
    background: var(--accent);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-add-comment:hover {
    background: var(--accent-hover);
/* }
/* تنسيق زر الأطفال في الناف بار */
/* .nav-links a.nav-kids-btn {
    background: linear-gradient(135deg, #ff7675, #fdcb6e);
    color: #fff !important;
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: bold;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-links a.nav-kids-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(253, 203, 110, 0.4); */
} */






.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 8px;
}



 .nav-links a.nav-kids-btn:hover{
    display: flex;
    align-items: center;
    gap: 1rem;
}


.btn-random {
    background: linear-gradient(135deg,  var(--accent, #10b981), var(--accent-secondary,    #5ea549));  
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: #10b981;
    transition: var(--transition, all 0.3s ease);
    outline: none;
    width: 220px;
    margin: 20px auto;
}

/* تأثير عند مرور الماوس (Hover) */ 
.btn-random:hover {
    background: linear-gradient(135deg,  var(--accent, #10b981), var(--accent-secondary,    #5ea549));  
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 6px 18px #10b981;
}

/* تأثير الدوران للأيقونة عند تحريك الماوس فوق الزر */
.btn-random:hover i {
    animation: diceRoll 0.6s ease-in-out;
}

/* حركة دوران النرد/الأيقونة */
@keyframes diceRoll {
    0% { transform: rotate(0deg); }
    50% { transform: rotate(180deg) scale(1.2); }
    100% { transform: rotate(360deg); }
}

/* التوافق مع الشاشات الصغيرة (الهواتف) */
@media (max-width: 600px) {
    .btn-random {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
}
img, video {
  max-width: 100%;
  height: auto;
}
/* التصميم الأساسي للشاشات الكبيرة (الكمبيوتر) */
.container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

/* الشاشات المتوسطة والصغيرة (الموبايل والتابلت - أقل من 768px) */
@media (max-width: 768px) {
  .container {
    flex-direction: column; /* تحويل العناصر لتصبح فوق بعضها بدلاً من بجانب بعضها */
  }

  body {
    font-size: 14px; /* تصغير حجم الخط للشاشات الصغيرة */
  }
}