/* ==========================================================================
   الأساسيات والمتغيرات (Root Variables & Reset)
   ========================================================================== */
:root {
    /* الألوان الأساسية */
    --primary-color: #00B4D8;      /* أزرق مدرار التعليمية (السماوي التقني) */
    --primary-dark: #0077b6;       /* أزرق داكن للـ Hover */
    --primary-light: #e0f0ff;
    
    /* ألوان الدلالات (Semantic Colors) */
    --success-color: #10b981;      /* أخضر للنجاح */
    --danger-color:  #ef4444;      /* أحمر للحذف والأخطاء */
    --warning-color: #f59e0b;      /* برتقالي للتنبيهات والتعديل */
    --purple-color:  #8b5cf6;      /* بنفسجي للأنشطة الإبداعية */
    
    /* ألوان النصوص والخلفيات */
    --text-color:    #1e293b;      /* نصوص داكنة مريحة للعين */
    --text-muted:    #64748b;      /* نصوص ثانوية (رمادي) */
    --bg-color:      #f4f7f6;      /* خلفية المنصة (رمادي فاتح جداً) */
    --card-bg:       #ffffff;      /* خلفية البطاقات (أبيض نقي) */
    
    /* إعدادات عامة */
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Cairo', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* ==========================================================================
   شريط التنقل العلوي (Navbar)
   ========================================================================== */
.navbar {
    background-color: var(--card-bg);
    padding: 15px 5%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

/* زر العودة في شريط التنقل */
.btn-back {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}
.btn-back:hover {
    color: var(--primary-color);
}

/* ==========================================================================
   الأزرار (Buttons)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: 'Cairo', sans-serif;
}

.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }

.btn-success { background: var(--success-color); color: #fff; }
.btn-success:hover { background: #059669; transform: translateY(-2px); }

.btn-warning { background: var(--warning-color); color: #fff; }
.btn-warning:hover { background: #d97706; transform: translateY(-2px); }

.btn-danger { background: #fee2e2; color: var(--danger-color); }
.btn-danger:hover { background: var(--danger-color); color: #fff; }

/* ==========================================================================
   النماذج والحقول (Forms & Inputs)
   ========================================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: 'Cairo', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
    background-color: #fff;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15); /* لون تركيز سماوي */
}

/* ==========================================================================
   البطاقات والأقسام (Cards & Sections)
   ========================================================================== */
.content-section, .form-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    margin-bottom: 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--bg-color);
}

.section-header h3 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin: 0;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ==========================================================================
   الجداول (Tables)
   ========================================================================== */
.table-responsive {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

.table-responsive::-webkit-scrollbar { height: 8px; }
.table-responsive::-webkit-scrollbar-thumb { background-color: #cbd5e1; border-radius: 10px; }

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

th, td {
    padding: 16px 20px;
    text-align: right;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

th {
    background-color: #f8fafc;
    font-weight: 700;
    color: var(--text-muted);
    font-size: 0.95rem;
}

tbody tr { transition: var(--transition); }
tbody tr:hover { background-color: #f8fafc; }

/* ==========================================================================
   الشارات والتنبيهات (Badges & Alerts)
   ========================================================================== */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.badge-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.badge-muted { background: #f1f5f9; color: #64748b; border: 1px solid #e2e8f0; }

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 25px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success { background-color: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background-color: #fee2e2; color: #b91c1c; border: 1px solid #fca5a5; }

/* ==========================================================================
   التوافقية مع الشاشات (Responsive Mobile Media Queries)
   ========================================================================== */
@media (max-width: 768px) {
    .navbar { padding: 15px 20px; }
    .navbar-brand { font-size: 1.2rem; }
    .btn { padding: 8px 16px; font-size: 0.9rem; }
    .container { padding: 0 15px; margin: 20px auto; }
    .content-section, .form-card { padding: 20px 15px; }
    .section-header h3 { font-size: 1.2rem; }
}