/* ========================================
   المتغيرات الأساسية - Design Tokens
======================================== */
:root {
    /* الألوان الرئيسية */
    --primary: #1e3a5f;
    --primary-light: #2d5a8a;
    --primary-dark: #0d1f33;
    --secondary: #d4af37;
    --secondary-light: #e5c85c;
    --accent: #ff6b35;
    
    /* ألوان الخلفية */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-dark: #1a1a2e;
    
    /* ألوان النص */
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --text-on-dark: #f7fafc;
    
    /* التدرجات */
    --gradient-primary: linear-gradient(135deg, #1e3a5f 0%, #2d5a8a 100%);
    --gradient-gold: linear-gradient(135deg, #d4af37 0%, #f4d03f 100%);
    --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #16213e 50%, #0f0f23 100%);
    
    /* الظلال */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.3);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: blur(10px);
    
    /* الحركة */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* المسافات */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* الحدود */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50%;
}

/* ========================================
   التصفير الأساسي - Reset
======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    direction: rtl;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ========================================
   الحاويات - Containers
======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-wide {
    max-width: 1400px;
}

.container-narrow {
    max-width: 800px;
}

/* ========================================
   شريط التنقل - Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(30, 58, 95, 0.95);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-gold);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-dark);
    font-weight: bold;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-on-dark);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--text-on-dark);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--secondary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-on-dark);
    border-radius: 3px;
    transition: var(--transition-base);
}

/* ========================================
   قسم البطل - Hero Section
======================================== */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--text-on-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.hero-text h1 span {
    color: var(--secondary);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book-showcase {
    display: flex;
    gap: var(--spacing-md);
    perspective: 1000px;
}

.book-card-hero {
    width: 180px;
    height: 270px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-slow);
    transform-style: preserve-3d;
}

.book-card-hero:nth-child(1) {
    transform: rotateY(-15deg) translateZ(-50px);
}

.book-card-hero:nth-child(2) {
    transform: scale(1.1) translateZ(50px);
    z-index: 2;
}

.book-card-hero:nth-child(3) {
    transform: rotateY(15deg) translateZ(-50px);
}

.book-card-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-card-hero:hover {
    transform: scale(1.15) translateZ(60px);
    box-shadow: var(--shadow-gold);
}

/* ========================================
   الأزرار - Buttons
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--primary-dark);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-on-dark);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-on-dark);
}

/* ========================================
   عناوين الأقسام - Section Headers
======================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-subtitle {
    display: inline-block;
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.section-desc {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   بطاقات الكتب - Book Cards
======================================== */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.book-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.book-cover {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.book-card:hover .book-cover img {
    transform: scale(1.05);
}

.book-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--gradient-gold);
    color: var(--primary-dark);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 600;
}

.book-info {
    padding: var(--spacing-lg);
}

.book-series {
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.book-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.book-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ========================================
   قسم السلاسل - Series Section
======================================== */
.series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.series-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    color: var(--text-on-dark);
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.series-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 60%);
    transition: var(--transition-slow);
}

.series-card:hover::before {
    transform: translate(25%, 25%);
}

.series-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.series-icon {
    width: 60px;
    height: 60px;
    background: var(--glass-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
}

.series-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.series-count {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.series-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* ========================================
   قسم عن المؤلف - About Author
======================================== */
.about-section {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.author-image {
    position: relative;
}

.author-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.author-image::before {
    content: '';
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 100%;
    height: 100%;
    background: var(--gradient-gold);
    border-radius: var(--radius-lg);
    z-index: -1;
}

.about-text h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
}

.author-achievements {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.achievement {
    text-align: center;
}

.achievement-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 1.3rem;
}

.achievement-text {
    font-weight: 600;
    color: var(--primary);
}

/* ========================================
   شهادات القراء - Testimonials
======================================== */
.testimonials-section {
    background: var(--gradient-hero);
    color: var(--text-on-dark);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.testimonial-name {
    font-weight: 600;
}

.testimonial-role {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ========================================
   التذييل - Footer
======================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-on-dark);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-about p {
    color: var(--text-light);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--secondary);
    color: var(--primary-dark);
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--secondary);
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-light);
}

.footer-links a:hover {
    color: var(--secondary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ========================================
   زر العودة للأعلى - Scroll to Top
======================================== */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-xl);
    left: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--gradient-gold);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-size: 1.3rem;
    box-shadow: var(--shadow-gold);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
}

/* ========================================
   الرسوم المتحركة - Animations
======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.animate-fade-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ========================================
   التوافق مع الأجهزة - Responsive
======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text p {
        margin: 0 auto var(--spacing-xl);
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: var(--spacing-2xl);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .author-image {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        justify-content: center;
        padding: var(--spacing-2xl);
        transition: var(--transition-base);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .book-showcase {
        flex-direction: column;
        align-items: center;
    }
    
    .book-card-hero {
        transform: none !important;
    }
    
    .book-card-hero:nth-child(2) {
        order: -1;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .book-card-hero {
        width: 150px;
        height: 225px;
    }
    
    .author-achievements {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}