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

:root {
    --primary-blue: #1e3a8a;
    --secondary-blue: #1e40af;
    --light-blue: #3b82f6;
    --very-light-blue: #dbeafe;
    --white: #ffffff;
    --gray: #f8fafc;
    --dark-gray: #4b5563;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --arabic-pattern: #1e3a8a20;
    --gold: #FFD700;
    --silver: #C0C0C0;
    --bronze: #CD7F32;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --dark-text: #e2e8f0;
    --transition: all 0.3s ease;
}

body {
    background-color: var(--gray);
    color: #1f2937;
    direction: rtl;
    overflow-x: hidden;
    font-size: 0.9rem;
    background-image:
        radial-gradient(circle at 10% 20%, var(--arabic-pattern) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, var(--arabic-pattern) 0%, transparent 20%);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

.container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* تصميم صفحة تسجيل الدخول */
.login-page {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-blue) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    position: relative;
    overflow: hidden;
}

.arabic-pattern-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image:
        url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M50 0C22.4 0 0 22.4 0 50s22.4 50 50 50 50-22.4 50-50S77.6 0 50 0zm0 90c-22.1 0-40-17.9-40-40s17.9-40 40-40 40 17.9 40 40-17.9 40-40 40z' fill='%23ffffff'/%3E%3Cpath d='M50 20c16.5 0 30 13.5 30 30S66.5 80 50 80 20 66.5 20 50s13.5-30 30-30zm0 50c11 0 20-9 20-20s-9-20-20-20-20 9-20 20 9 20 20 20z' fill='%23ffffff'/%3E%3C/svg%3E"),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0c16.5 0 30 13.5 30 30S46.5 60 30 60 0 46.5 0 30 13.5 0 30 0zm0 50c11 0 20-9 20-20s-9-20-20-20-20 9-20 20 9 20 20 20z' fill='%23ffffff'/%3E%3C/svg%3E");
    background-size: 200px 200px, 100px 100px;
    background-position: 10% 20%, 80% 70%;
}

.login-container {
    display: flex;
    background-color: var(--white);
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    max-width: 1100px;
    width: 100%;
    min-height: 550px;
    margin: 1rem;
    z-index: 1;
    position: relative;
    animation: fadeInScale 0.8s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.login-image {
    flex: 1;
    background: linear-gradient(135deg, var(--dark-bg), var(--primary-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.login-image::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.3;
}

.login-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    transition: var(--transition);
}

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

.login-form {
    flex: 1;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 350px;
}

.login-form h2 {
    color: var(--dark-bg);
    margin-bottom: 1rem;
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.login-form h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    right: 50%;
    transform: translateX(50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    border-radius: 2px;
}

.login-subtitle {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-gray);
    font-size: 1rem;
}

.form-group {
    margin-bottom: 1.2rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--dark-gray);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.9rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: var(--transition);
    font-family: 'Cairo', sans-serif;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--light-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

/* تصميم حقل كلمة المرور مع زر الإظهار */
.password-input-container {
    position: relative;
}

.password-toggle {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--dark-gray);
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: var(--transition);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    background-color: var(--very-light-blue);
    color: var(--primary-blue);
}

.password-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.password-input-container input {
    padding-right: 0.9rem;
    padding-left: 3rem;
}

.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 1.2rem;
}

.remember-me input {
    margin-left: 0.5rem;
}

.btn {
    padding: 0.9rem;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    font-weight: 600;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Cairo', sans-serif;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-blue) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(30, 64, 175, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    margin-top: 0.5rem;
}

.btn-secondary:hover {
    background-color: var(--very-light-blue);
}

.btn-sm {
    padding: 0.5rem 1rem;
    width: auto;
    font-size: 0.85rem;
}

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

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

/* تصميم شريط قوة كلمة المرور */
.password-strength {
    margin-top: 10px;
    display: none;
}

.strength-bar {
    width: 100%;
    height: 6px;
    background: #e5e7eb;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 5px;
}

.strength-fill {
    height: 100%;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.strength-text {
    font-size: 0.8rem;
    color: var(--dark-gray);
    text-align: center;
}

.strength-weak {
    background: var(--danger);
    width: 33%;
}

.strength-medium {
    background: var(--warning);
    width: 66%;
}

.strength-strong {
    background: var(--success);
    width: 100%;
}

/* رسائل الخطأ */
.input-error {
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 5px;
    display: none;
}

/* تصميم الصفحة الرئيسية */
.dashboard {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.sidebar {
    width: 250px;
    background: linear-gradient(180deg, var(--primary-blue) 0%, #1e3a8a 100%);
    color: white;
    padding: 1.2rem 0.8rem;
    overflow-y: auto;
    box-shadow: 3px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
    position: fixed;
    height: 100vh;
    transition: var(--transition);
    border-left: 3px solid var(--light-blue);
    bottom: 0;
    top: 0;
}

.logo {
    display: flex;
    align-items: center;
    margin-bottom: 1.8rem;
    padding: 0 0.5rem;
}

.logo i {
    font-size: 1.8rem;
    margin-left: 0.5rem;
    transition: var(--transition);
}

.logo:hover i {
    transform: rotate(15deg);
}

.logo h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 0.9rem;
    margin-bottom: 0.4rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

.sidebar li::before {
    content: '';
    position: absolute;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition);
}

.sidebar li:hover::before,
.sidebar li.active::before {
    right: 100%;
}

.sidebar li:hover,
.sidebar li.active {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateX(-5px);
    border-right: 3px solid var(--light-blue);
}

.sidebar li i {
    width: 18px;
    text-align: center;
}

.main-content {
    flex: 1;
    padding: 1.8rem;
    overflow-y: auto;
    background-color: var(--gray);
    margin-right: 250px;
    width: calc(100% - 250px);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.8rem;
    background-color: var(--white);
    padding: 1.2rem 1.8rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    animation: slideInFromTop 0.5s ease-out;
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-info {
    background-color: var(--white);
    padding: 1.8rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 1.8rem;
    animation: fadeIn 0.5s;
}

.user-info h3 {
    color: var(--primary-blue);
    margin-bottom: 1.2rem;
    padding-bottom: 0.9rem;
    border-bottom: 2px solid #eee;
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 1.2rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    padding: 0.8rem;
    border-radius: 8px;
    transition: var(--transition);
}

.info-item:hover {
    background-color: var(--very-light-blue);
}

.info-item label {
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
}

.info-item span {
    font-size: 1rem;
    color: #374151;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
    margin-bottom: 1.8rem;
}

.stat-card {
    background-color: var(--white);
    padding: 1.8rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid var(--primary-blue);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin-bottom: 0.9rem;
    font-weight: 600;
}

.stat-card .value {
    color: var(--primary-blue);
    font-size: 1.8rem;
    font-weight: 700;
}

.points-card {
    border-top-color: var(--gold);
}

.points-card .value {
    color: var(--gold);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    position: relative;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.08);
}

.course-thumbnail {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    position: relative;
    overflow: hidden;
}

.course-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.7) 0%, rgba(59, 130, 246, 0.7) 100%);
    opacity: 0;
    transition: var(--transition);
}

.course-card:hover .course-thumbnail::after {
    opacity: 1;
}

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

.course-card:hover .course-thumbnail img {
    transform: scale(1.1);
}

.course-info {
    padding: 1.2rem;
}

.course-info h3 {
    margin-bottom: 0.7rem;
    color: var(--primary-blue);
    font-size: 1.1rem;
    font-weight: 700;
}

.course-info p {
    color: var(--dark-gray);
    margin-bottom: 0.9rem;
    line-height: 1.5;
    font-size: 0.9rem;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    color: var(--dark-gray);
    font-size: 0.85rem;
    margin-bottom: 1.2rem;
    font-weight: 500;
}

/* تصميم النوافذ المنبثقة */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s;
    padding: 1rem;
}

.modal-content {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 12px;
    width: 100%;
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
    animation: slideUp 0.4s;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.8rem;
    padding-bottom: 1.2rem;
    border-bottom: 2px solid #eee;
}

.modal-header h2 {
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 1.3rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--dark-gray);
    transition: var(--transition);
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-btn:hover {
    color: var(--danger);
    background-color: #f3f4f6;
    transform: rotate(90deg);
}

/* تصميم لوحة المعلم */
.teacher-dashboard {
    padding: 1.8rem;
}

.video-list {
    background-color: var(--white);
    border-radius: 12px;
    padding: 1.8rem;
    margin-bottom: 1.8rem;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.video-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem;
    border-bottom: 1px solid #eee;
    transition: var(--transition);
}

.video-item:hover {
    background-color: var(--very-light-blue);
}

.video-item:last-child {
    border-bottom: none;
}

.student-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.student-table th,
.student-table td {
    padding: 1rem;
    text-align: right;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
    transition: var(--transition);
}

.student-table tr:hover td {
    background-color: var(--very-light-blue);
}

.student-table th {
    background-color: var(--very-light-blue);
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 0.9rem;
}

.student-table tr:last-child td {
    border-bottom: none;
}

.action-btn {
    background: none;
    border: none;
    color: var(--primary-blue);
    cursor: pointer;
    margin-left: 0.4rem;
    transition: var(--transition);
    font-size: 1rem;
}

.action-btn:hover {
    color: var(--light-blue);
    transform: scale(1.2);
}

.file-upload {
    border: 3px dashed #ddd;
    border-radius: 12px;
    padding: 2.5rem 1.8rem;
    text-align: center;
    margin-bottom: 1.8rem;
    transition: var(--transition);
    cursor: pointer;
    background-color: #fafafa;
}

.file-upload:hover {
    border-color: var(--light-blue);
    background-color: var(--very-light-blue);
}

.file-upload i {
    font-size: 2.5rem;
    color: var(--dark-gray);
    margin-bottom: 1.2rem;
    transition: var(--transition);
}

.file-upload:hover i {
    color: var(--primary-blue);
    transform: translateY(-5px);
}

.file-upload input {
    display: none;
}

.upload-progress {
    margin-top: 1rem;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: #e5e7eb;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.4rem;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    width: 0%;
    transition: width 0.3s;
}

/* تأثيرات الحركة */
.fade-in {
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.slide-in {
    animation: slideIn 0.4s;
}

@keyframes slideIn {
    from {
        transform: translateY(-15px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.slide-up {
    animation: slideUp 0.5s;
}

@keyframes slideUp {
    from {
        transform: translateY(25px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* إشعارات */
.flash-messages {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 10000;
    max-width: 400px;
}

.flash-message {
    padding: 1rem 1.5rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideIn 0.5s;
}

.flash-message.success {
    background-color: var(--success);
}

.flash-message.error {
    background-color: var(--danger);
}

.flash-message.warning {
    background-color: var(--warning);
}

.empty-state {
    text-align: center;
    padding: 3rem 1.8rem;
    color: var(--dark-gray);
}

.empty-state i {
    font-size: 3.5rem;
    margin-bottom: 1.2rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.video-player {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.video-player video {
    width: 100%;
    display: block;
}

.thumbnail-upload {
    margin-bottom: 1.2rem;
}

.thumbnail-preview {
    width: 100%;
    max-width: 280px;
    height: 160px;
    border-radius: 8px;
    overflow: hidden;
    margin-top: 0.8rem;
    border: 2px solid #e5e7eb;
    display: none;
}

.thumbnail-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.student-management-modal .modal-content {
    max-width: 550px;
}

.status-badge {
    padding: 0.3rem 0.7rem;
    border-radius: 5px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.active {
    background-color: var(--success);
    color: white;
}

.status-badge.banned {
    background-color: var(--danger);
    color: white;
}

/* تأثيرات عربية */
.arabic-decoration {
    position: absolute;
    font-size: 8rem;
    opacity: 0.03;
    color: var(--primary-blue);
    z-index: 0;
    pointer-events: none;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px) rotate(15deg);
    }

    50% {
        transform: translateY(-10px) rotate(15deg);
    }

    100% {
        transform: translateY(0px) rotate(15deg);
    }
}

.decoration-1 {
    top: 10%;
    left: 5%;
    transform: rotate(15deg);
}

.decoration-2 {
    bottom: 10%;
    right: 5%;
    transform: rotate(-15deg);
    animation-delay: 2s;
}

/* تنسيقات نظام النقاط */
.points-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 1.8rem;
}

.points-table th,
.points-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
}

.points-table th {
    background-color: var(--very-light-blue);
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 0.9rem;
}

.points-table tr:last-child td {
    border-bottom: none;
}

.rank-1 {
    background-color: rgba(255, 215, 0, 0.1);
}

.rank-2 {
    background-color: rgba(192, 192, 192, 0.1);
}

.rank-3 {
    background-color: rgba(205, 127, 50, 0.1);
}

.rank-badge {
    display: inline-block;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    margin-left: 0.5rem;
}

.rank-1 .rank-badge {
    background-color: var(--gold);
    color: white;
}

.rank-2 .rank-badge {
    background-color: var(--silver);
    color: white;
}

.rank-3 .rank-badge {
    background-color: var(--bronze);
    color: white;
}

.grade-tabs {
    display: flex;
    margin-bottom: 1.5rem;
    background-color: var(--white);
    border-radius: 10px;
    padding: 0.5rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.grade-tab {
    flex: 1;
    text-align: center;
    padding: 0.8rem;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 600;
}

.grade-tab.active {
    background-color: var(--primary-blue);
    color: white;
}

/* حماية الفيديو */
.video-protection {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 10;
    border-radius: 8px;
}

.watch-count {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    z-index: 5;
}

/* تأثيرات جديدة */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.zoom-on-hover {
    transition: var(--transition);
}

.zoom-on-hover:hover {
    transform: scale(1.05);
}

/* صفحة تشغيل الفيديو */
.video-player-page {
    min-height: 100vh;
    background: var(--dark-bg);
    color: var(--dark-text);
}

.player-nav {
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.player-nav h1 {
    color: white;
    font-size: 1.2rem;
    margin: 0;
}

.points-badge {
    background: linear-gradient(135deg, var(--gold), #ffed4a);
    color: #000;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.video-player-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.video-wrapper {
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.video-wrapper video {
    width: 100%;
    height: auto;
    display: block;
}

.custom-controls {
    position: absolute;
    bottom: 1rem;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
}

.control-group {
    background: rgba(0, 0, 0, 0.7);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    display: flex;
    gap: 1rem;
    backdrop-filter: blur(10px);
}

.control-btn {
    background: none;
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.video-info-panel {
    background: var(--dark-card);
    border-radius: 12px;
    padding: 1.5rem;
}

.video-meta h2 {
    color: white;
    margin-bottom: 1rem;
}

.video-description {
    color: var(--dark-text);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.meta-grid {
    display: grid;
    gap: 0.8rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark-text);
}

.meta-item i {
    color: var(--light-blue);
    width: 16px;
}

.points-panel {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.points-panel h3 {
    color: white;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.points-status {
    color: white;
}

.points-message {
    margin-bottom: 1rem;
    font-weight: 500;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gold);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    font-weight: bold;
    min-width: 40px;
}

.points-earned {
    background: linear-gradient(135deg, var(--success), #34d399);
}

/* الفيديوهات المقترحة */
.suggested-videos {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.suggested-videos h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.suggested-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.suggested-card {
    background: var(--dark-card);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.suggested-card:hover {
    transform: translateY(-5px);
}

.suggested-thumbnail {
    position: relative;
    height: 140px;
    overflow: hidden;
}

.suggested-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.suggested-card:hover .play-overlay {
    opacity: 1;
}

.play-overlay i {
    color: white;
    font-size: 2rem;
}

.suggested-info {
    padding: 1rem;
}

.suggested-info h4 {
    color: white;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.suggested-info p {
    color: var(--dark-text);
    font-size: 0.8rem;
}

/* ===== تصميم الفوتر الجديد ===== */
.site-footer {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-blue) 100%);
    color: var(--dark-text);
    padding: 2.5rem 0 0;
    margin-top: auto;
    border-top: 4px solid var(--light-blue);
    border-bottom: 4px solid var(--gold);
    position: relative;

    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h4 i {
    color: var(--light-blue);
}

.footer-section p {
    line-height: 1.6;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    margin-top: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark-text);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
    font-weight: 500;
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-5px);
    color: white;
}

.social-link.whatsapp:hover {
    color: #25D366;
}

.social-link.facebook:hover {
    color: #1877F2;
}

.social-link.youtube:hover {
    color: #FF0000;
}

.developer-contact {
    margin-top: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark-text);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light-blue);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark-text);
    text-decoration: none;
    padding: 0.3rem 0;
    transition: var(--transition);
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--light-blue);
    transform: translateX(-5px);
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.3);
    text-align: center;
    padding: 1.2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--dark-text);
    margin: 0;
    font-size: 0.9rem;
}

/* ===== تصميم أزرار التصفية بين الصفوف ===== */
.students-tabs {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.8rem;
    background: var(--white);
    border-radius: 15px;
    padding: 0.8rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 2px solid rgba(59, 130, 246, 0.1);
    position: relative;
    overflow: hidden;
}

.students-tabs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue), var(--success));
}

.students-tab {
    flex: 1;
    text-align: center;
    padding: 1rem 1.2rem;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-weight: 700;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    color: var(--dark-gray);
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 60px;
}

.students-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgb(255, 255, 255), transparent);
    transition: all 0.5s ease;
}

.students-tab:hover::before {
    left: 100%;
}

.students-tab:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 60, 255, 0.15);
    border-color: var(--light-blue);
    color: var(--primary-blue);
}

.students-tab.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    color: white;
    border-color: var(--primary-blue);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.25);
    transform: translateY(-2px);
}

.students-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--gold);
    border-radius: 2px;
}

.students-tab i {
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.students-tab.active i {
    color: var(--gold);
    transform: scale(1.1);
}

.tab-badge {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-blue);
    padding: 0.2rem 0.6rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-right: 0.3rem;
    transition: all 0.3s ease;
}

.students-tab.active .tab-badge {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* ===== تصميم محرك البحث ===== */
.search-container {
    background: var(--white);
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.1);
    position: relative;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    right: 1rem;
    color: var(--dark-gray);
    font-size: 1.1rem;
    z-index: 2;
}

.search-input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'Cairo', sans-serif;
    transition: all 0.3s ease;
    background: var(--gray);
    padding-left: 3.5rem;
}

.search-input:focus {
    border-color: var(--light-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
    background: var(--white);
}

.search-input::placeholder {
    color: var(--dark-gray);
    opacity: 0.7;
}

.search-clear {
    position: absolute;
    left: 1rem;
    background: none;
    border: none;
    color: var(--dark-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.search-clear:hover {
    background: var(--gray);
    color: var(--danger);
    transform: scale(1.1);
}

.search-results-info {
    text-align: center;
    margin-top: 1rem;
    padding: 0.8rem;
    background: var(--very-light-blue);
    border-radius: 8px;
    border-right: 4px solid var(--primary-blue);
    display: none;
}

.search-results-info.show {
    display: block;
    animation: slideIn 0.3s ease;
}

.search-results-info .results-count {
    font-weight: 700;
    color: var(--primary-blue);
}

.search-results-info .search-query {
    font-weight: 600;
    color: var(--dark-gray);
}

/* ===== تصميم قسم الفيديوهات الجديد ===== */
.videos-filter-tabs {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.8rem;
    background: var(--white);
    border-radius: 15px;
    padding: 0.8rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 2px solid rgba(59, 130, 246, 0.1);
    flex-wrap: wrap;
}

.filter-tab {
    flex: 1;
    text-align: center;
    padding: 1rem 1.2rem;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-weight: 700;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: var(--dark-gray);
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-width: 150px;
}

.filter-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: all 0.5s ease;
}

.filter-tab:hover::before {
    left: 100%;
}

.filter-tab:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.15);
    border-color: var(--light-blue);
    color: var(--primary-blue);
}

.filter-tab.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    color: white;
    border-color: var(--primary-blue);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.25);
    transform: translateY(-2px);
}

.filter-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--gold);
    border-radius: 2px;
}

.filter-tab i {
    font-size: 1rem;
    transition: all 0.3s ease;
}

.filter-tab.active i {
    color: var(--gold);
    transform: scale(1.1);
}

/* شبكة عرض الفيديوهات */
.videos-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.video-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 2px solid rgba(59, 130, 246, 0.1);
    position: relative;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--light-blue);
}

.video-thumbnail {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--dark-bg), var(--primary-blue));
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.7), rgba(59, 130, 246, 0.7));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .video-overlay {
    opacity: 1;
}

.play-button {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-blue);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.play-button:hover {
    background: white;
    transform: scale(1.1);
}

.video-info {
    padding: 1.5rem;
}

.video-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1.4;
    flex: 1;
    margin-right: 1rem;
}

.video-actions {
    display: flex;
    gap: 0.5rem;
}

.video-action-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
}

.delete-btn {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.delete-btn:hover {
    background: var(--danger);
    color: white;
    transform: scale(1.1);
}

.code-btn {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.code-btn:hover {
    background: var(--success);
    color: white;
    transform: scale(1.1);
}

.video-description {
    color: var(--dark-gray);
    line-height: 1.5;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.video-grade {
    background: var(--very-light-blue);
    color: var(--primary-blue);
    padding: 0.3rem 0.7rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.video-stats {
    display: flex;
    gap: 1rem;
    color: var(--dark-gray);
    font-size: 0.8rem;
}

.video-stat {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.video-stat i {
    color: var(--primary-blue);
}

/* ===== تحسينات للاستجابة على الموبايل ===== */

/* شاشات متوسطة (تابلات) */
@media (max-width: 1200px) {
    .sidebar {
        width: 220px;
    }

    .main-content {
        margin-right: 220px;
        width: calc(100% - 220px);
    }

    .video-player-container {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* شاشات صغيرة (موبايل أفقي) */
@media (max-width: 992px) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        margin-right: 200px;
        width: calc(100% - 200px);
        padding: 1.2rem;
    }

    .login-container {
        flex-direction: column;
        max-width: 450px;
    }

    .login-image {
        padding: 1.2rem;
        min-height: 180px;
    }

    .login-form {
        padding: 1.8rem;
        min-width: auto;
    }

    .header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .videos-grid-container {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}
@media(max-width:1656px){
    .footer-container {
     max-width: 1000px;
        margin: 5 auto;
        padding: 1 2.5rem;
        display: grid;
        grid-template-columns: repeat(4, 2fr);
        gap: 4rem;
}

} 
@media(max-width:1500px){
    .footer-container {
     max-width: 800px;
        margin: 5 auto;
        padding: 1 2.5rem;
        display: grid;
        grid-template-columns: repeat(4, 2fr);
        gap: 4rem;
}

} 
@media(max-width:1300px){
    .footer-container {
     max-width: 700px;
      text-align: center;

}


} 
@media(max-width:1332px){
    .modal-content {
        padding: 1.2rem;
        margin: 0.8rem;
    }


    .footer-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .social-links {
        align-items: center;
    }

    .footer-section h4 {
        justify-content: center;
    }
} 



/* شاشات الموبايل */
@media (max-width: 796px) {
    .dashboard {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        min-height: auto;
        padding: 1rem 0.5rem;
    }

    .sidebar ul {
        display: flex;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }

    .sidebar li {
        flex: 0 0 auto;
        white-space: nowrap;
        margin-bottom: 0;
        margin-left: 0.5rem;
    }

    .main-content {
        margin-right: 0;
        width: 100%;
        padding: 1rem;
    }

    .logo {
        justify-content: center;
        text-align: center;
        margin-bottom: 1rem;
    }

    .login-page {
        padding: 0.5rem;
    }

    .login-container {
        margin: 0.5rem;
        max-width: 100%;
    }

 

    .login-form {
        padding: 1.5rem;
        width: 100%;
    }

    .header {
        padding: 1rem;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-card .value {
        font-size: 1.4rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .students-tabs {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.8rem;
    }

    .students-tab {
        min-height: 50px;
        font-size: 0.9rem;
    }

    .students-tab i {
        font-size: 1rem;
    }

    .videos-filter-tabs {
        flex-direction: column;
    }

    .filter-tab {
        min-width: auto;
    }

    .videos-grid-container {
        grid-template-columns: 1fr;
    }

    .video-header {
        flex-direction: column;
        gap: 1rem;
    }

    .video-actions {
        align-self: flex-end;
    }

    .modal-content {
        padding: 1.2rem;
        margin: 0.8rem;
    }

    .search-container {
        padding: 1rem;
    }

    .search-input {
        padding: 0.8rem 2.5rem 0.8rem 0.8rem;
        font-size: 0.9rem;
    }

    .search-icon {
        right: 0.8rem;
    }

    .search-clear {
        left: 0.8rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .social-links {
        align-items: center;
    }

    .footer-section h4 {
        justify-content: center;
    }

    .video-player-container {
        padding: 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .control-group {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* شاشات الموبايل الصغيرة */
@media (max-width: 480px) {
    .main-content {
        padding: 0.8rem;
    }

    .login-form {
        padding: 1.2rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }

    .btn {
        padding: 0.8rem;
        font-size: 0.9rem;
    }

    .video-card {
        margin: 0 0.5rem;
    }

    .video-info {
        padding: 1rem;
    }

    .students-tabs {
        padding: 0.6rem;
    }

    .students-tab {
        padding: 0.8rem 1rem;
        font-size: 0.85rem;
    }

    .tab-badge {
        padding: 0.15rem 0.4rem;
        font-size: 0.75rem;
    }

    .modal-content {
        padding: 1rem;
        margin: 0.5rem;
    }

    .search-box {
        width: 100%;
        margin-top: 0.5rem;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .search-box input {
        padding: 10px 45px 10px 15px;
        font-size: 0.9rem;
    }
}

/* تحسينات إضافية للاستجابة */
@media (max-width: 360px) {
    .login-form h2 {
        font-size: 1.5rem;
    }

    .stat-card {
        padding: 0.8rem;
    }

    .stat-card .value {
        font-size: 1.2rem;
    }

    .video-thumbnail {
        height: 150px;
    }

    .course-thumbnail {
        height: 120px;
    }
}

/* تحسينات للوضع الأفقي على الموبايل */
@media (max-height: 500px) and (orientation: landscape) {
    .login-page {
        padding: 0.5rem;
    }

    .login-container {
        min-height: auto;
        max-height: 90vh;
        overflow-y: auto;
    }

    .login-form {
        padding: 1rem;
    }

    .form-group {
        margin-bottom: 0.8rem;
    }
}

/* تحسينات للشاشات عالية الدقة */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
        margin: 0 auto;
    }

    .main-content {
        padding: 2rem;
    }
}

/* تحسينات للطباعة */
@media print {

    .sidebar,
    .player-nav,
    .footer,
    .btn,
    .modal,
    .search-container {
        display: none !important;
    }

    .main-content {
        margin-right: 0;
        width: 100%;
    }

    body {
        background: white;
        color: black;
    }
}

/* تحسينات إضافية للصور المصغرة */
.video-thumbnail img.cover {
    object-fit: cover;
}

.video-thumbnail img.contain {
    object-fit: contain;
    background: #f8fafc;
}

.video-thumbnail.ratio-16-9 {
    aspect-ratio: 16/9;
}

.video-thumbnail.ratio-4-3 {
    aspect-ratio: 4/3;
}

.video-thumbnail.ratio-1-1 {
    aspect-ratio: 1/1;
}

.course-thumbnail.background-image {
    background-size: cover;
    background-position: center;
}

.course-thumbnail.centered img {
    object-fit: contain;
    background: white;
    padding: 10px;
}

/* الصور المصغرة الذكية */
.smart-thumbnail {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.smart-thumbnail.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.responsive-image {
    max-width: 100%;
    height: auto;
}

.adaptive-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.aspect-ratio-box {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 Aspect Ratio */
}

.aspect-ratio-box img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.aspect-ratio-1-1 {
    padding-top: 100%;
    /* 1:1 Aspect Ratio */
}

.aspect-ratio-4-3 {
    padding-top: 75%;
    /* 4:3 Aspect Ratio */
}

/* تنسيق حقل إدخال الكود لكل فيديو */
.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.code-input {
    flex: 1;
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-family: 'Cairo', sans-serif;
}

.code-hint {
    color: #6c757d;
    font-size: 0.8rem;
    display: block;
}

.alert {
    transition: opacity 0.5s ease-in-out;
    padding-right: 40px !important;
}

.close-btn:hover {
    opacity: 0.7;
}/* تنسيقات شريط تقدم الرفع */
.upload-progress-container {
    background: #f8f9fa;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    display: none;
}

.upload-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.upload-progress-header h4 {
    margin: 0;
    color: var(--primary-blue);
    font-size: 1.1rem;
}

.upload-progress-header span {
    font-weight: bold;
    color: var(--primary-blue);
    font-size: 1.1rem;
}

.upload-progress-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.upload-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), #60a5fa);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.upload-progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.upload-progress-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    font-size: 0.85rem;
}

.upload-detail {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background: white;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
}

.upload-detail span:first-child {
    font-weight: 500;
    color: var(--dark-gray);
}

.upload-detail span:last-child {
    font-weight: bold;
    color: var(--primary-blue);
}

/* تأثيرات للشريط أثناء الرفع */
.upload-progress-fill {
    background: linear-gradient(90deg, #3b82f6, #60a5fa, #93c5fd);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}