/* ================================
   المتغيرات العامة - Theme Variables
   ================================ */
:root {
    /* الألوان الأساسية - ألوان الحضارة المصرية */
    --color-primary: #1a2b4a;          /* أزرق النيل الغامق */
    --color-primary-light: #243d6e;
    --color-primary-dark: #0d1b2e;
    --color-accent: #c9961e;           /* ذهبي فرعوني */
    --color-accent-light: #e5b84a;
    --color-accent-dark: #a07a12;
    --color-bg: #fdf8f0;               /* بيج رملي فاتح */
    --color-bg-alt: #f5edd8;           /* بيج ذهبي فاتح */
    --color-text: #2c1f0e;             /* بني داكن */
    --color-text-light: #6b5a45;
    --color-white: #ffffff;
    --color-border: #e2d5b8;           /* حدود بيج ذهبية */
    --color-success: #27ae60;
    --color-danger: #e74c3c;

    /* الخطوط */
    --font-main: 'Cairo', 'Tajawal', sans-serif;
    --font-heading: 'Tajawal', 'Cairo', sans-serif;
    --font-main-en: 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-heading-en: 'Poppins', 'Inter', 'Segoe UI', sans-serif;

    /* المسافات */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;

    /* الحدود */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* الظلال */
    --shadow-sm: 0 2px 8px rgba(26, 43, 74, 0.06);
    --shadow-md: 0 4px 20px rgba(26, 43, 74, 0.1);
    --shadow-lg: 0 10px 40px rgba(26, 43, 74, 0.15);
    --shadow-xl: 0 20px 60px rgba(26, 43, 74, 0.2);

    /* الانتقالات */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* العرض */
    --container-max: 1280px;
}

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

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

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
}

html[dir="rtl"] body {
    direction: rtl;
}

html[dir="ltr"] body {
    direction: ltr;
}

/* LTR font override */
html[dir="ltr"] body {
    font-family: var(--font-main-en);
    line-height: 1.7;
}
html[dir="ltr"] h1,
html[dir="ltr"] h2,
html[dir="ltr"] h3,
html[dir="ltr"] h4,
html[dir="ltr"] .hero-title,
html[dir="ltr"] .section-title,
html[dir="ltr"] .research-card-title,
html[dir="ltr"] .video-card-title,
html[dir="ltr"] .library-card-title,
html[dir="ltr"] .feature-title,
html[dir="ltr"] .about-profile-name,
html[dir="ltr"] .timeline-item-year,
html[dir="ltr"] .stat-item-number,
html[dir="ltr"] .hero-stat-number,
html[dir="ltr"] .about-preview-experience-number,
html[dir="ltr"] .quote-text,
html[dir="ltr"] .footer-col h4 {
    font-family: var(--font-heading-en);
}

a {
    text-decoration: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

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

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ================================
   الحاوية - Container
   ================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ================================
   الهيدر - Header
   ================================ */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(26, 43, 74, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
    border-bottom: 1px solid rgba(201, 169, 97, 0.15);
}

.header.scrolled {
    background: rgba(15, 29, 51, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 12px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    transition: var(--transition);
}

.logo:hover {
    color: var(--color-accent);
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--color-primary-dark);
    font-weight: 900;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.logo-text small {
    font-size: 0.7rem;
    color: var(--color-accent);
    font-weight: 400;
}

/* القائمة - Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-accent);
    background: rgba(201, 169, 97, 0.08);
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: 16px;
    left: 16px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* زر تبديل اللغة - Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: rgba(201, 169, 97, 0.12);
    border: 1px solid rgba(201, 169, 97, 0.25);
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 600;
    transition: var(--transition);
    flex-shrink: 0;
}

.lang-toggle:hover {
    background: rgba(201, 169, 97, 0.2);
    border-color: var(--color-accent);
}

.lang-toggle i {
    font-size: 0.9rem;
}

/* زر القائمة للجوال */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    width: 26px;
    height: 3px;
    background: var(--color-white);
    border-radius: 3px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ================================
   الهيرو - Hero Section
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23c9a961" opacity="0.15"/></svg>');
    background-size: 40px 40px;
    opacity: 0.5;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0.15;
    animation: floatParticle linear infinite;
}

@keyframes floatParticle {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 0.15; }
    90% { opacity: 0.15; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    width: 100%;
}

.hero-text {
    color: var(--color-white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(201, 169, 97, 0.15);
    border: 1px solid rgba(201, 169, 97, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.8s ease;
}

.hero-badge i {
    font-size: 0.9rem;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-title .accent {
    color: var(--color-accent);
    position: relative;
}

.hero-title .accent::after {
    content: '';
    position: absolute;
    bottom: 4px;
    right: 0;
    left: 0;
    height: 4px;
    background: var(--color-accent);
    opacity: 0.3;
    border-radius: 4px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
    line-height: 1.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.3s both;
}

/* صورة الهيرو */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.4s both;
}

.hero-image-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(201, 169, 97, 0.2), rgba(201, 169, 97, 0.05));
    border: 3px solid rgba(201, 169, 97, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-image-wrapper::before {
    content: '';
    position: absolute;
    inset: -20px;
    border: 1px dashed rgba(201, 169, 97, 0.2);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: var(--color-accent);
    font-weight: 900;
}

.hero-image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    border-radius: inherit;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeInUp 0.8s ease 0.5s both;
}

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

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
    font-family: var(--font-heading);
}

.hero-stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ================================
   الأزرار - Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-primary-dark);
    box-shadow: 0 4px 15px rgba(201, 169, 97, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(201, 169, 97, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(201, 169, 97, 0.05);
}

.btn-dark {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-dark:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-light {
    background: var(--color-white);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-light:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
    box-shadow: var(--shadow-sm);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

/* ================================
   عناوين الأقسام - Section Headers
   ================================ */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

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

.section-eyebrow {
    display: inline-block;
    color: var(--color-accent-dark);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    right: 50%;
    transform: translateX(50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    border-radius: 4px;
}

.section-subtitle {
    color: var(--color-text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: var(--spacing-md) auto 0;
}

/* ================================
   البطاقات - Cards
   ================================ */
.card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

/* بطاقة البحث */
.research-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

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

.research-card-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.research-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.research-card:hover .research-card-image img {
    transform: scale(1.07);
}

.research-card-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 43, 74, 0.5) 0%, transparent 60%);
    z-index: 1;
}

.research-card-image i {
    font-size: 3rem;
    color: var(--color-accent);
    opacity: 0.6;
}

.research-card-tag {
    z-index: 2;
}

.research-card-tag {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(201, 169, 97, 0.9);
    color: var(--color-primary-dark);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.research-card-body {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.research-card-date {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.research-card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.research-card-excerpt {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    flex: 1;
}

.research-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.research-card-link {
    color: var(--color-accent-dark);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.research-card-link:hover {
    gap: 12px;
    color: var(--color-accent);
}

.research-card-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.research-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* بطاقة الفيديو */
.video-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.07);
}

.video-thumbnail::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 29, 51, 0.75) 0%, rgba(15, 29, 51, 0.25) 100%);
    z-index: 1;
}

.video-play-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(201, 169, 97, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-dark);
    font-size: 1.5rem;
    transition: var(--transition);
    z-index: 3;
    position: relative;
}

.video-play-btn::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid rgba(201, 169, 97, 0.4);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.15); opacity: 0; }
}

.video-card:hover .video-play-btn {
    transform: scale(1.15);
    background: var(--color-accent);
}

.video-duration {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    z-index: 3;
}

.video-card-body {
    padding: var(--spacing-md);
}

.video-card-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 6px;
    line-height: 1.5;
}

.video-card-meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 12px;
}

/* بطاقة المكتبة */
.library-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.library-card:hover {
    transform: translateX(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.library-card-icon {
    width: 75px;
    height: 95px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 1.8rem;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.library-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.library-card-icon::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 12px;
    height: 100%;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.library-card-body {
    flex: 1;
}

.library-card-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.library-card-meta {
    font-size: 0.85rem;
    color: var(--color-text-light);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.library-card-actions {
    display: flex;
    gap: 8px;
}

/* ================================
   الشبكات - Grids
   ================================ */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

/* ================================
   قسم المميزات - Features
   ================================ */
.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, rgba(201, 169, 97, 0.1), rgba(201, 169, 97, 0.05));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--color-accent-dark);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    transform: scale(1.1);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.feature-text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ================================
   قسم نبذة عن الباحث - About Preview
   ================================ */
.about-preview {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-preview-image {
    position: relative;
}

.about-preview-image-wrapper {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.about-preview-image-wrapper::before {
    content: '';
    position: absolute;
    inset: -15px;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    opacity: 0.3;
    z-index: -1;
}

.about-preview-placeholder {
    font-size: 5rem;
    color: var(--color-accent);
    font-weight: 900;
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-preview-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: inherit;
}

.about-preview-experience {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background: var(--color-white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--color-border);
}

.about-preview-experience-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent-dark);
    font-family: var(--font-heading);
    line-height: 1;
}

.about-preview-experience-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

.about-preview-text h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.about-preview-text p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.9;
}

.about-preview-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.about-preview-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--color-text);
}

.about-preview-list li i {
    color: var(--color-accent-dark);
    font-size: 1.1rem;
}

/* ================================
   شريط الإحصائيات - Stats Bar
   ================================ */
.stats-bar {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.stats-bar::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><path d="M30 0 L60 30 L30 60 L0 30 Z" fill="%23c9a961" opacity="0.03"/></svg>');
}

.stats-bar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: var(--color-white);
}

.stat-item-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    font-family: var(--font-heading);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item-label {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ================================
   الاقتباس - Quote Section
   ================================ */
.quote-section {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: var(--spacing-xl) 0;
    position: relative;
    border-top: 3px solid var(--color-accent);
    border-bottom: 3px solid var(--color-accent);
}

.quote-block {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.quote-mark {
    font-size: 5rem;
    color: var(--color-accent);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
    margin-bottom: -20px;
}

.quote-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.quote-author {
    color: var(--color-accent-light);
    font-weight: 600;
    font-size: 1rem;
}

.quote-author::before {
    content: '— ';
}

/* ================================
   صفحة الهيدر الفرعي - Page Header
   ================================ */
.page-header {
    background: linear-gradient(160deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, #2c4a7c 100%);
    padding: 140px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23c9a961" opacity="0.1"/></svg>');
    background-size: 30px 30px;
}

.page-header h1 {
    position: relative;
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
    z-index: 1;
}

.page-header p {
    position: relative;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

.breadcrumb span {
    color: var(--color-accent);
}

/* ================================
   شريط البحث والتصفية - Search & Filter
   ================================ */
.filter-bar {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-bg);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.1);
}

.search-box i {
    position: absolute;
    top: 50%;
    right: 14px;
    transform: translateY(-50%);
    color: var(--color-text-light);
    font-size: 1rem;
}

.filter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-tag {
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.filter-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
}

.filter-tag.active {
    background: var(--color-primary);
    color: var(--color-white);
}

/* ================================
   صفحة السيرة الذاتية - About Page
   ================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-sidebar {
    position: sticky;
    top: 100px;
}

.about-profile-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.about-profile-image {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--color-accent);
    font-weight: 900;
    overflow: hidden;
}

.about-profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform 0.5s ease;
}

.about-profile-image:hover img {
    transform: scale(1.05);
}

.about-profile-body {
    padding: var(--spacing-lg);
    text-align: center;
}

.about-profile-name {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.about-profile-title {
    color: var(--color-accent-dark);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.about-profile-social {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    transition: var(--transition);
    font-size: 1.1rem;
}

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

.about-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
}

.about-content h3:first-child {
    margin-top: 0;
}

.about-content p {
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: var(--spacing-sm);
}

/* الجدول الزمني - Timeline */
.timeline {
    position: relative;
    padding-right: 30px;
    margin-top: var(--spacing-md);
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    right: 8px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
    padding-right: var(--spacing-md);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 6px;
    right: -26px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item-year {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-accent-dark);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.timeline-item-title {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1rem;
    margin-bottom: 4px;
}

.timeline-item-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* المهارات/الاهتمامات */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: var(--spacing-sm);
}

.tag-pill {
    padding: 6px 16px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--color-text);
    transition: var(--transition);
}

.tag-pill:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* ================================
   صفحة التواصل - Contact
   ================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
}

.contact-info-card {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.contact-info-card::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background: rgba(201, 169, 97, 0.08);
    border-radius: 50%;
}

.contact-info-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.contact-info-card p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.contact-info-item-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(201, 169, 97, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-info-item-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.contact-info-item-value {
    font-weight: 600;
    font-size: 0.95rem;
}

.contact-info-social {
    display: flex;
    gap: 10px;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.contact-info-social .social-link {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.contact-info-social .social-link:hover {
    background: var(--color-accent);
    color: var(--color-primary-dark);
}

/* نموذج التواصل */
.contact-form-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-bg);
    color: var(--color-text);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.1);
    background: var(--color-white);
}

textarea.form-input {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(39, 174, 96, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(39, 174, 96, 0.2);
}

/* ================================
   الفيديو المنبثق - Video Modal
   ================================ */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 29, 51, 0.9);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.video-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.video-modal-content {
    width: 100%;
    max-width: 900px;
    position: relative;
}

.video-modal-close {
    position: absolute;
    top: -40px;
    left: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-white);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.video-modal-close:hover {
    background: var(--color-accent);
    transform: rotate(90deg);
}

.video-modal iframe {
    width: 100%;
    height: 500px;
    border: none;
    border-radius: var(--radius-md);
}

/* ================================
   الفوتر - Footer
   ================================ */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social .social-link {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
}

.footer-social .social-link:hover {
    background: var(--color-accent);
    color: var(--color-primary-dark);
}

.footer-col h4 {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 30px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul li a:hover {
    color: var(--color-accent);
    padding-right: 4px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.footer-contact-item i {
    color: var(--color-accent);
    margin-top: 4px;
    flex-shrink: 0;
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.footer-bottom a {
    color: var(--color-accent);
}

/* ================================
   زر العودة للأعلى - Back to Top
   ================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-accent);
    color: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ================================
   التحميل - Preloader
   ================================ */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(201, 169, 97, 0.2);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ================================
   تأثيرات الحركة - Animations
   ================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

/* عناصر تظهر عند التمرير */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* ================================
   التجاوب - Responsive
   ================================ */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.8rem; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
    .about-preview { grid-template-columns: 1fr; }
    .about-preview-image { max-width: 400px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-primary-dark);
        flex-direction: column;
        align-items: stretch;
        padding: 80px var(--spacing-md) var(--spacing-md);
        gap: 0;
        transition: right 0.4s ease;
        box-shadow: -5px 0 30px rgba(0,0,0,0.3);
    }
    .nav.active { right: 0; }
    .nav-link {
        padding: 14px 16px;
        border-radius: var(--radius-sm);
        margin-bottom: 4px;
        font-size: 1rem;
    }
    .nav-link.active::after { display: none; }
    .nav-link.active { background: rgba(201, 169, 97, 0.1); }

    .hero { min-height: auto; padding: 120px 0 60px; }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-image { order: -1; }
    .hero-image-wrapper { width: 250px; height: 250px; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { margin: 0 auto var(--spacing-lg); }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; flex-wrap: wrap; }

    .section { padding: var(--spacing-xl) 0; }
    .section-title { font-size: 1.8rem; }

    .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
    .stats-bar-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
    .stat-item-number { font-size: 2rem; }

    .about-grid { grid-template-columns: 1fr; }
    .about-sidebar { position: static; max-width: 400px; margin: 0 auto; }

    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

    .filter-bar { flex-direction: column; align-items: stretch; }
    .filter-tags { justify-content: center; }

    .page-header h1 { font-size: 2rem; }
    .quote-text { font-size: 1.2rem; }
    .about-preview-list { grid-template-columns: 1fr; }

    .library-card { flex-direction: column; text-align: center; }
    .library-card-actions { justify-content: center; }
}

@media (max-width: 480px) {
    .container { padding: 0 var(--spacing-sm); }
    .hero-title { font-size: 1.8rem; }
    .section-title { font-size: 1.5rem; }
    .hero-stats { gap: var(--spacing-sm); }
    .hero-stat-number { font-size: 1.5rem; }
    .stats-bar-grid { grid-template-columns: 1fr; }
    .btn { padding: 10px 20px; font-size: 0.85rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
}

/* ================================
   دعم LTR - LTR Direction Support
   ================================ */
html[dir="ltr"] body {
    direction: ltr;
    text-align: left;
}

/* Research card tag */
html[dir="ltr"] .research-card-tag {
    right: auto;
    left: 12px;
}

/* Video duration */
html[dir="ltr"] .video-duration {
    left: auto;
    right: 12px;
}

/* Library card hover */
html[dir="ltr"] .library-card:hover {
    transform: translateX(4px);
}

/* Library card icon spine */
html[dir="ltr"] .library-card-icon::after {
    right: auto;
    left: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

/* About preview experience badge */
html[dir="ltr"] .about-preview-experience {
    left: auto;
    right: -20px;
}

/* Section title underline */
html[dir="ltr"] .section-title::after {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
}

/* Timeline */
html[dir="ltr"] .timeline {
    padding-right: 0;
    padding-left: 30px;
}

html[dir="ltr"] .timeline::before {
    right: auto;
    left: 8px;
}

html[dir="ltr"] .timeline-item {
    padding-right: 0;
    padding-left: var(--spacing-md);
}

html[dir="ltr"] .timeline-item::before {
    right: auto;
    left: -26px;
}

/* Contact info card decorative circle */
html[dir="ltr"] .contact-info-card::before {
    left: auto;
    right: -50px;
}

/* Search box */
html[dir="ltr"] .search-box input {
    padding: 12px 16px 12px 40px;
}

html[dir="ltr"] .search-box i {
    right: auto;
    left: 14px;
}

/* Video modal close */
html[dir="ltr"] .video-modal-close {
    left: auto;
    right: 0;
}

/* Footer */
html[dir="ltr"] .footer-col h4::after {
    right: auto;
    left: 0;
}

html[dir="ltr"] .footer-col ul li a:hover {
    padding-right: 0;
    padding-left: 4px;
}

/* Back to top */
html[dir="ltr"] .back-to-top {
    left: auto;
    right: 30px;
}

/* Mobile nav in LTR */
@media (max-width: 768px) {
    html[dir="ltr"] .nav {
        right: auto;
        left: -100%;
        box-shadow: 5px 0 30px rgba(0,0,0,0.3);
    }
    html[dir="ltr"] .nav.active {
        right: auto;
        left: 0;
    }
}

/* LTR arrow icons - flip direction */
html[dir="ltr"] .research-card-link i.fa-arrow-left,
html[dir="ltr"] .btn i.fa-arrow-left {
    transform: rotate(180deg);
}

/* Quote author dash */
html[dir="ltr"] .quote-author {
    direction: ltr;
}

/* Breadcrumb separator */
html[dir="ltr"] .breadcrumb {
    direction: ltr;
}

/* Preloader */
html[dir="ltr"] .preloader {
    direction: ltr;
}

/* ================================
   قاموس أسامة السعداوي - Dictionary Layout
   ================================ */
.dictionary-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.dictionary-sidebar {
    background: linear-gradient(180deg, #5a3d1a 0%, #7a5220 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--color-white);
    position: sticky;
    top: 100px;
    border: 2px solid var(--color-accent);
    box-shadow: var(--shadow-md);
}

.dictionary-sidebar-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-accent-light);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-accent);
    text-align: center;
}

.dictionary-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0;
    margin: 0;
}

.dictionary-menu li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    color: #f5edd8;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 0.78rem;
    border-right: 3px solid transparent;
    line-height: 1.4;
}

.dictionary-menu li a span {
    flex: 1;
    word-break: break-word;
}

.dictionary-menu li a:hover,
.dictionary-menu li a.active {
    background: rgba(201, 150, 30, 0.25);
    color: var(--color-accent-light);
    border-right-color: var(--color-accent);
}

.dictionary-menu li a i {
    color: var(--color-accent);
    font-size: 0.85rem;
    width: 18px;
    text-align: center;
}

.dictionary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.dictionary-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none;
    display: block;
}

.dictionary-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.dictionary-letter {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    padding: var(--spacing-sm);
    font-family: var(--font-heading);
}

.dictionary-image {
    height: 130px;
    overflow: hidden;
    position: relative;
    background: var(--color-bg-alt);
}

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

.dictionary-card:hover .dictionary-image img {
    transform: scale(1.05);
}

.dictionary-body {
    padding: var(--spacing-sm);
    text-align: center;
}

.dictionary-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 4px;
    font-weight: 700;
}

.dictionary-count {
    font-size: 0.82rem;
    color: var(--color-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.custom-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.pagination-link:hover:not(.disabled):not(.active) {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination-link.active {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-primary-dark);
    border-color: var(--color-accent);
    font-weight: 700;
}

.pagination-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    color: var(--color-text-light);
}

.dictionary-alphabet {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 992px) {
    .dictionary-layout {
        grid-template-columns: 1fr;
    }
    .dictionary-sidebar {
        position: static;
        order: -1;
    }
    .dictionary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .dictionary-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================
   صفحة الأبحاث - Research Detail Layout
   ================================ */
.research-detail {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.research-detail-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    position: relative;
}

.research-detail-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    pointer-events: none;
}

.research-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.research-detail-header {
    padding: var(--spacing-md);
}

.research-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-sm);
}

.research-detail-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, rgba(201, 150, 30, 0.12), rgba(201, 150, 30, 0.06));
    color: var(--color-accent-dark);
    font-size: 0.82rem;
    font-weight: 700;
    border: 1px solid rgba(201, 150, 30, 0.2);
}

.research-detail-badge i {
    font-size: 0.8rem;
}

.research-detail-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-border);
}

.research-detail-excerpt {
    font-size: 1.02rem;
    color: var(--color-text-light);
    line-height: 1.8;
    font-style: italic;
    border-inline-start: 4px solid var(--color-accent);
    padding-inline-start: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.research-detail-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text);
}

.research-detail-content h2,
.research-detail-content h3,
.research-detail-content h4 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.research-detail-content h2 { font-size: 1.3rem; }
.research-detail-content h3 { font-size: 1.15rem; }
.research-detail-content h4 { font-size: 1.05rem; }

.research-detail-content p {
    margin-bottom: var(--spacing-sm);
    text-align: justify;
}

.research-detail-content ul,
.research-detail-content ol {
    margin-bottom: var(--spacing-sm);
    padding-inline-start: var(--spacing-md);
}

.research-detail-content li {
    margin-bottom: 6px;
    line-height: 1.8;
}

.research-detail-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: var(--spacing-sm) 0;
    box-shadow: var(--shadow-sm);
}

.research-detail-content blockquote {
    border-inline-start: 4px solid var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-sm) 0;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    font-style: italic;
    color: var(--color-text-light);
}

.research-detail-content a {
    color: var(--color-accent-dark);
    text-decoration: underline;
    font-weight: 600;
}

.research-detail-content a:hover {
    color: var(--color-accent);
}

.research-detail-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-sm) 0;
}

.research-detail-content table th,
.research-detail-content table td {
    border: 1px solid var(--color-border);
    padding: 8px 12px;
    text-align: start;
}

.research-detail-content table th {
    background: var(--color-bg-alt);
    font-weight: 700;
    color: var(--color-primary);
}

/* Navigation buttons */
.research-detail-nav {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 2px solid var(--color-border);
    background: var(--color-bg-alt);
}

.research-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    max-width: 48%;
    overflow: hidden;
}

.research-nav-btn span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.research-nav-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.research-nav-btn i {
    font-size: 0.8rem;
    flex-shrink: 0;
}

.research-main-content {
    min-height: 400px;
}

@media (max-width: 992px) {
    .research-detail-image {
        height: 200px;
    }
    .research-detail-title {
        font-size: 1.25rem;
    }
    .research-detail-nav {
        flex-direction: column;
        gap: 8px;
    }
    .research-nav-btn {
        max-width: 100%;
        width: 100%;
        justify-content: center;
    }
}