/* إعادة تعيين الأساسيات */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* المتغيرات CSS للألوان والقيم */
:root {
    /* الوضع الفاتح */
    --primary-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-bg: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    --accent-color: #4facfe;
    --accent-hover: #00f2fe;
    --success-color: #4ade80;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* الظلال */
    --shadow-light: 0 8px 32px rgba(31, 38, 135, 0.37);
    --shadow-medium: 0 15px 35px rgba(31, 38, 135, 0.5);
    --shadow-heavy: 0 25px 50px rgba(31, 38, 135, 0.7);
    
    /* الانتقالات */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* الخطوط */
    --font-family: 'Cairo', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
}

/* الوضع المظلم */
[data-theme="dark"] {
    --primary-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --secondary-bg: rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(0, 0, 0, 0.2);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);
}

/* الجسم الرئيسي */
body {
    font-family: var(--font-family);
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    direction: rtl;
}

/* تأثير الزجاج */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--shadow-light);
}

/* شاشة التحميل */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loading-content {
    text-align: center;
    animation: fadeInUp 1s ease;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--glass-border);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* الحاوي الرئيسي */
.main-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: opacity var(--transition-slow);
}

.main-container.hidden {
    opacity: 0;
    pointer-events: none;
}

/* الهيدر */
.header {
    padding: 20px 0;
    position: relative;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 5px;
    background: linear-gradient(45deg, var(--accent-color), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 300;
}

.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
}

.theme-icon {
    font-size: var(--font-size-xl);
    transition: transform var(--transition-fast);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(180deg);
}

/* المحتوى الرئيسي */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* حاوي البحث */
.search-container {
    width: 100%;
    max-width: 800px;
    margin-bottom: 40px;
}

.search-box {
    padding: 30px;
    animation: slideInDown 0.8s ease;
}

.search-input-container {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

#search-input {
    flex: 1;
    padding: 18px 25px;
    font-size: var(--font-size-lg);
    border: 2px solid var(--glass-border);
    border-radius: 15px;
    background: var(--secondary-bg);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

#search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.3);
    transform: translateY(-2px);
}

#search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 18px 30px;
    background: linear-gradient(45deg, var(--accent-color), var(--accent-hover));
    border: none;
    border-radius: 15px;
    color: white;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-light);
    font-family: var(--font-family);
}

.search-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.search-btn:active {
    transform: translateY(-1px);
}

.search-options {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

#results-limit {
    padding: 8px 15px;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: var(--secondary-bg);
    color: var(--text-primary);
    font-family: var(--font-family);
    cursor: pointer;
}

/* حاوي النتائج */
.results-container {
    width: 100%;
    animation: fadeInUp 0.6s ease;
}

.results-container.hidden {
    display: none;
}

.results-header {
    margin-bottom: 30px;
    text-align: center;
}

.results-header h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: 10px;
    color: var(--text-primary);
}

.results-info {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.results-list {
    display: grid;
    gap: 25px;
}

/* عنصر النتيجة */
.result-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 25px;
    transition: all var(--transition-medium);
    animation: slideInUp 0.5s ease;
    box-shadow: var(--shadow-light);
}

.result-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-color);
}

.result-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--accent-color);
    text-decoration: none;
    display: block;
    transition: color var(--transition-fast);
}

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

.result-url {
    font-size: var(--font-size-sm);
    color: var(--success-color);
    margin-bottom: 15px;
    word-break: break-all;
}

.result-snippet {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.result-summary {
    background: var(--secondary-bg);
    padding: 20px;
    border-radius: 15px;
    border-right: 4px solid var(--accent-color);
    margin-top: 15px;
}

.result-summary h4 {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: var(--font-size-base);
    font-weight: 600;
}

.result-summary p {
    color: var(--text-primary);
    line-height: 1.7;
}

/* حالة التحميل */
.search-loading {
    text-align: center;
    padding: 60px 20px;
    animation: fadeIn 0.5s ease;
}

.search-loading.hidden {
    display: none;
}

.search-loading .loading-spinner {
    margin-bottom: 20px;
}

/* رسالة الخطأ */
.error-message {
    text-align: center;
    padding: 40px 20px;
    animation: fadeIn 0.5s ease;
}

.error-message.hidden {
    display: none;
}

.error-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--error-color);
    border-radius: 20px;
    padding: 30px;
    max-width: 500px;
    margin: 0 auto;
}

.error-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: 15px;
    display: block;
}

.retry-btn {
    margin-top: 20px;
    padding: 12px 25px;
    background: var(--error-color);
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.retry-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* زر تحميل المزيد */
.load-more-container {
    text-align: center;
    margin-top: 40px;
}

.load-more-container.hidden {
    display: none;
}

.load-more-btn {
    padding: 15px 40px;
    background: var(--glass-bg);
    border: 2px solid var(--accent-color);
    border-radius: 15px;
    color: var(--accent-color);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
    font-family: var(--font-family);
}

.load-more-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

/* الفوتر */
.footer {
    margin-top: auto;
    padding: 30px 0;
    border-top: 1px solid var(--glass-border);
    background: var(--secondary-bg);
    backdrop-filter: blur(10px);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: var(--font-size-sm);
}

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

/* النافذة المنبثقة */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    padding: 0;
    animation: modalSlideIn 0.3s ease;
}

.modal-header {
    padding: 25px 30px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 30px;
    color: var(--text-secondary);
    line-height: 1.7;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

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

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

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

/* التجاوب مع الشاشات الصغيرة */
@media (max-width: 768px) {
    .header-content {
        padding: 0 15px;
    }
    
    .logo h1 {
        font-size: var(--font-size-2xl);
    }
    
    .main-content {
        padding: 20px 15px;
    }
    
    .search-box {
        padding: 20px;
    }
    
    .search-input-container {
        flex-direction: column;
        gap: 15px;
    }
    
    #search-input {
        font-size: var(--font-size-base);
        padding: 15px 20px;
    }
    
    .search-btn {
        padding: 15px 25px;
        justify-content: center;
    }
    
    .search-options {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .result-item {
        padding: 20px;
    }
    
    .result-title {
        font-size: var(--font-size-lg);
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-header,
    .modal-body {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: var(--font-size-xl);
    }
    
    .tagline {
        font-size: var(--font-size-xs);
    }
    
    .theme-toggle {
        width: 45px;
        height: 45px;
    }
    
    .search-box {
        padding: 15px;
    }
    
    #search-input {
        padding: 12px 15px;
    }
    
    .search-btn {
        padding: 12px 20px;
    }
    
    .result-item {
        padding: 15px;
    }
}

/* تحسينات الأداء */
.results-list {
    contain: layout style paint;
}

.result-item {
    contain: layout style paint;
    will-change: transform;
}

/* تحسينات إمكانية الوصول */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* تحسين التباين للنصوص */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #ffffff;
        --text-secondary: #e5e5e5;
        --glass-border: rgba(255, 255, 255, 0.5);
    }
}

/* إخفاء العناصر */
.hidden {
    display: none !important;
}