/* ==========================================================================
   1. VARIABLES & GLOBAL RESET
   ========================================================================== */
:root {
    --primary-color: #3B82F6; /* أزرق عصري */
    --primary-dark: #2563EB;
    --secondary-color: #6B7280; /* رمادي هادئ */
    --background-color: #F9FAFB;
    --surface-color: #FFFFFF;
    --text-color: #1F2937;
    --border-color: #E5E7EB;
    --light-gray: #F3F4F6;
    
    --success-bg: #F0FDF4; --success-border: #BBF7D0; --success-text: #166534;
    --error-bg: #FEF2F2; --error-border: #FECACA; --error-text: #991B1B;
    --warning-bg: #FEFCE8; --warning-border: #FEF08A; --warning-text: #854D0E;
    
    --sidebar-bg: #111827;
    --sidebar-text: #9CA3AF;
    --sidebar-hover-bg: #374151;
    --sidebar-active-text: #FFFFFF;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Cairo', sans-serif;
    margin: 0;
    color: var(--text-color);
    background-color: var(--background-color);
    font-size: 16px;
    line-height: 1.6;
}

/* ==========================================================================
   2. CORE LAYOUT (SIDEBAR, LOGIN PAGE, ETC.)
   ========================================================================== */

.page-wrapper {
    display: flex;
}

/* --- Layout for Logged-in Users --- */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    min-height: 100vh;
}
.main-content {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
}

/* --- Special Layout for Login Page --- */
body.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}
body.login-body .page-wrapper, 
body.login-body .main-content {
    display: contents; /* Makes containers invisible to layout */
}
body.login-body .sidebar,
body.login-body .university-header {
    display: none;
}

/* ==========================================================================
   3. COMPONENTS
   ========================================================================== */

/* --- University Header --- */
.university-header {
    background-color: var(--primary-dark);
    color: white;
    text-align: center;
    padding: 1rem 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.university-header h1 { margin: 0; font-size: 1.75rem; }
.university-header h2 { margin: 0.25rem 0 0 0; font-size: 1rem; font-weight: 400; opacity: 0.9; }

/* --- Sidebar --- */
.sidebar-header { padding: 1.5rem; text-align: center; border-bottom: 1px solid var(--sidebar-hover-bg); }
.sidebar-header h3 { margin: 0; color: var(--sidebar-active-text); font-size: 1.5rem; }
.sidebar-nav { flex-grow: 1; }
.sidebar-nav ul { list-style: none; padding: 0; margin: 1rem 0; }
.sidebar-nav a { display: flex; align-items: center; padding: 0.8rem 1.5rem; color: var(--sidebar-text); text-decoration: none; transition: all 0.2s; border-radius: 0.5rem; margin: 0.25rem 0.5rem; }
.sidebar-nav a:hover, .sidebar-nav a.active { background-color: var(--sidebar-hover-bg); color: var(--sidebar-active-text); }
.sidebar-nav i { font-size: 1.4rem; margin-left: 1rem; }
.sidebar-footer { padding: 1.5rem; text-align: center; border-top: 1px solid var(--sidebar-hover-bg); }
.sidebar-footer p { margin: 0 0 0.5rem 0; color: var(--sidebar-active-text); font-weight: 700; }
.sidebar-footer a { color: var(--error-color); text-decoration: none; font-weight: 700; }
.sidebar-footer .copyright { font-size: 0.75rem; color: var(--secondary-color); margin-top: 1rem; }

/* --- Page Content & Containers --- */
.page-content { background-color: var(--surface-color); padding: 2rem; border-radius: 1rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05); }
.page-content h2 { margin-top: 0; padding-bottom: 1rem; margin-bottom: 2rem; border-bottom: 1px solid var(--border-color); color: var(--text-color); }

/* --- Forms --- */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: #374151; font-weight: 700; font-size: 0.95rem; }
.form-group input, .form-group select { width: 100%; padding: 0.875rem; border: 1px solid var(--border-color); border-radius: 0.5rem; transition: border-color 0.2s, box-shadow 0.2s; font-family: 'Cairo', sans-serif; font-size: 1rem; }
.form-group input:focus, .form-group select:focus { border-color: var(--primary-color); outline: none; box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }
.form-actions { margin-top: 1.5rem; }
button, .form-actions a { padding: 0.8rem 1.5rem; border-radius: 0.5rem; font-weight: 700; cursor: pointer; transition: all 0.2s; border: none; font-family: 'Cairo', sans-serif; }
button[type="submit"] { background-color: var(--primary-color); color: white; }
button[type="submit"]:hover { background-color: var(--primary-dark); }
.form-actions a.cancel-btn { background-color: var(--secondary-color); color: white; margin-right: 0.5rem; }
.form-actions a.cancel-btn:hover { background-color: #4B5563; }
.form-row { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-bottom: 1.25rem; }
.form-row .form-group { flex: 1; min-width: 200px; margin-bottom: 0; }

/* --- Aesthetic Form Containers --- */
.add-schedule-form, .manage-entity-form { margin: 0 auto 40px auto; border: 1px solid var(--border-color); border-radius: 1rem; overflow: hidden; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
.add-schedule-form { max-width: 800px; }
.manage-entity-form { max-width: 600px; }
.add-schedule-form h3, .manage-entity-form h3 { background-color: var(--light-gray); margin: 0; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border-color); font-size: 1.25rem; color: var(--text-color); }
.add-schedule-form .form-body, .manage-entity-form .form-body { padding: 1.5rem; }

/* --- Login Form Specifics --- */
.login-container { background-color: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); padding: 2.5rem 3rem; border-radius: 1rem; box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); width: 100%; max-width: 450px; text-align: center; }
.login-header h1 { font-size: 2rem; color: #111827; margin: 0; }
.login-header h2 { font-size: 1rem; color: var(--secondary-color); margin: 0.5rem 0 2rem 0; }
.login-container .form-group { text-align: right; }
.login-container button[type="submit"] { width: 100%; font-size: 1.1rem; }

/* --- Tables --- */
.table-container { margin-bottom: 40px; overflow-x: auto; }
table { width: 100%; border-collapse: separate; border-spacing: 0; }
table th, table td { padding: 1rem; text-align: right; border-bottom: 1px solid var(--border-color); vertical-align: middle; white-space: nowrap; }
table th { background-color: var(--light-gray); font-weight: 700; color: var(--secondary-color); font-size: 0.9rem; text-transform: uppercase; }
table tbody tr:hover { background-color: #f9fafb; }
.actions { white-space: nowrap; }
.actions a, .actions button { color: white; padding: 0.4rem 0.8rem; border-radius: 0.375rem; text-decoration: none; margin: 0 0.125rem; border: none; font-size: 0.9rem; }
.actions form { margin: 0; display: inline-block; }
.edit-btn { background-color: #28a745; }
.edit-btn:hover { background-color: #218838; }
.delete-btn { background-color: #dc3545; }
.delete-btn:hover { background-color: #c82333; }

/* --- Messages (Success/Error) --- */
.message { padding: 1rem; margin-bottom: 1.5rem; border-radius: 0.5rem; border: 1px solid transparent; }
.message.success { background-color: var(--success-bg); color: var(--success-text); border-color: var(--success-border); }
.message.error { background-color: var(--error-bg); color: var(--error-text); border-color: var(--error-border); }

/* ==========================================================================
   4. SPECIFIC COMPONENT STYLES
   ========================================================================== */

/* --- Admin Dashboard --- */
.stats-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; margin-bottom: 2.5rem; }
.card { padding: 1.5rem; border-radius: 1rem; background: var(--surface-color); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05); display: flex; align-items: center; }
.card-icon { width: 50px; height: 50px; border-radius: 50%; margin-left: 1.25rem; display:flex; justify-content:center; align-items:center; flex-shrink: 0; }
.card-icon.icon-hall { background-color: #DBEAFE; } .card-icon.icon-hall svg { fill: #3B82F6; }
.card-icon.icon-rep { background-color: #D1FAE5; } .card-icon.icon-rep svg { fill: #10B981; }
.card-icon.icon-today { background-color: #FEF9C3; } .card-icon.icon-today svg { fill: #F59E0B; }
.card-icon.icon-faculty { background-color: #E0E7FF; } .card-icon.icon-faculty svg { fill: #6366F1; }
.card-icon.icon-supervisor { background-color: #FEE2E2; } .card-icon.icon-supervisor svg { fill: #EF4444; }
.card-icon svg { width: 50%; height: 50%; }
.card-info h4 { margin: 0 0 0.25rem 0; color: var(--secondary-color); font-size: 1rem; }
.card-info p { margin: 0; font-size: 2rem; font-weight: 700; color: var(--text-color); }
.quick-links h3 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.75rem; margin-bottom: 1.5rem; }
.links-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.link-card { background: var(--surface-color); padding: 1.5rem; border-radius: 1rem; text-decoration: none; color: inherit; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05); transition: transform 0.2s, box-shadow 0.2s; }
.link-card:hover { transform: translateY(-4px); box-shadow: 0 10px 20px rgba(0,0,0,0.07); }
.link-card h4 { margin: 0 0 0.5rem 0; font-size: 1.125rem; color: var(--primary-color); }
.link-card p { margin: 0; color: var(--secondary-color); line-height: 1.6; }

/* --- Schedule Grid (Admin/Supervisor) --- */
.filter-form form { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 1.5rem; }
.filter-form .form-group { margin-bottom: 0; }
.schedule-grid table { table-layout: fixed; }
.schedule-grid th, .schedule-grid td { text-align: center; }
.booking-cell { padding: 0.75rem; border-radius: 0.75rem; min-height: 100px; display: flex; flex-direction: column; justify-content: center; align-items: center; position: relative; }
.booking-cell strong { font-size: 0.9rem; }
.booking-cell small { font-size: 0.8rem; color: var(--secondary-color); }
.booking-cell em { font-size: 0.85rem; font-style: normal; font-weight: 700; }
.booking-cell.busy { background-color: var(--error-bg); border: 1px solid var(--error-border); color: var(--error-text); }
.booking-cell.free { background-color: var(--success-bg); border: 1px solid var(--success-border); color: var(--success-text); }
.booking-cell.noshow { background-color: var(--warning-bg); border: 1px solid var(--warning-border); color: var(--warning-text); text-decoration: line-through; opacity: 0.9; }
.booking-cell.cancelled { background-color: var(--light-gray); border: 1px solid var(--border-color); color: var(--secondary-color); text-decoration: line-through; opacity: 0.8; }
.status-label { margin-top: 0.5rem; font-weight: 700; font-size: 0.75rem; }
.admin-actions { position: absolute; top: 0.5rem; right: 0.5rem; display: flex; gap: 0.3rem; }
.admin-actions a { background-color: rgba(0,0,0,0.4); color: white !important; width: 24px; height: 24px; line-height: 24px; font-size: 16px; transition: all 0.2s; }
.admin-actions a:hover { background-color: rgba(0,0,0,0.6); transform: scale(1.1); }

/* --- Other Components --- */
.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }
.checkbox-item { background-color: var(--light-gray); padding: 0.75rem; border-radius: 0.5rem; display: flex; align-items: center; }
.checkbox-item input[type="checkbox"] { margin-left: 0.75rem; width: 1.25rem; height: 1.25rem; }
.main-actions { margin: 1.5rem 0; text-align: center; display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.action-btn { padding: 1rem 1.75rem; border-radius: 0.5rem; text-decoration: none; font-size: 1.125rem; font-weight: 700; transition: all 0.3s; border: 2px solid transparent; }
.action-btn:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.action-btn.primary-btn { background-color: var(--primary-color); color: #fff; border-color: var(--primary-color); }
.action-btn.secondary-btn { background-color: var(--secondary-color); color: #fff; border-color: var(--secondary-color); }
.admin-tools-link {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--sidebar-hover-bg);
}
.admin-tools-link a {
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: normal;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.admin-tools-link a:hover {
    color: var(--sidebar-active-text);
}
.admin-tools-link i {
    margin-left: 0.5rem;
}
/* ==========================================================================
   SPECIAL BUTTON STYLES
   ========================================================================== */

/* --- Destructive Action Button Style --- */
.btn-danger {
    background-color: var(--error-color) !important; /* استخدام اللون الأحمر الرئيسي */
    color: white !important;
    border: 2px solid #B91C1C !important; /* إطار أغمق قليلاً */
    font-size: 1.1rem !important; /* خط أكبر */
    padding: 0.9rem 2rem !important; /* مساحة داخلية أكبر */
    width: 100%;
    max-width: 400px; /* تحديد عرض أقصى */
    display: block;
    margin: 1rem auto 0 auto; /* توسيط الزر */
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3); /* ظل أحمر ناعم */
}

.btn-danger:hover {
    background-color: #B91C1C !important; /* لون أحمر أغمق عند المرور */
    border-color: #991B1B !important;
    transform: translateY(-2px); /* تأثير رفع بسيط */
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-danger i {
    margin-left: 0.5rem;
    vertical-align: middle; /* محاذاة الأيقونة مع النص */
    font-size: 1.2rem;
}
.form-group.checkbox-style {
    display: flex;
    align-items: center;
    background-color: var(--light-gray);
    padding: 1rem;
    border-radius: 0.5rem;
}
.form-group.checkbox-style input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-left: 0.75rem;
}
.form-group.checkbox-style label {
    margin-bottom: 0;
    font-weight: normal;
}

.badge-core, .badge-visiting {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 700;
}
.badge-core {
    background-color: var(--success-bg);
    color: var(--success-text);
}
.badge-visiting {
    background-color: var(--warning-bg);
    color: var(--warning-text);
}
/* --- Live View Page Styles --- */
.live-view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}
.live-view-header h2 {
    margin: 0;
    border: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.live-view-header h2 i {
    color: var(--error-color);
}
#last-updated {
    color: var(--secondary-color);
    font-weight: 700;
}

.live-view-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.hall-card {
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.07);
    border: 3px solid transparent;
    transition: all 0.3s ease;
}
.hall-card-header {
    padding: 0.75rem 1rem;
    background-color: #343a40;
    color: white;
}
.hall-card-header h3 { margin: 0; font-size: 1.2rem; }
.hall-card-header p { margin: 0; font-size: 0.8rem; opacity: 0.8; }
.hall-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 120px;
}
.hall-card-body i { font-size: 2.5rem; margin-bottom: 0.75rem; }
.hall-card-body strong { font-size: 1.1rem; }
.hall-card-body small { color: var(--secondary-color); font-size: 0.85rem; }
.hall-card-body span { font-weight: 700; }

/* Status Colors */
.hall-card.busy { border-color: var(--error-color); }
.hall-card.busy .hall-card-body i { color: var(--error-color); }

.hall-card.vacant { border-color: var(--success-color); }
.hall-card.vacant .hall-card-body i { color: var(--success-color); }

.hall-card.no_show { border-color: var(--warning-color); }
.hall-card.no_show .hall-card-body i { color: var(--warning-color); }

.hall-card.closed { border-color: var(--secondary-color); }
.hall-card.closed .hall-card-body i { color: var(--secondary-color); }
/* --- Reports Page Grid Layout --- */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}
/* ==========================================================================
   PUBLIC VIEW STYLES (schedule.php)
   ========================================================================== */

body.public-view-body {
    background-color: #eef1f4; /* نفس خلفية صفحة الدخول */
}

/* في الصفحة العامة، لا نحتاج للـ flex layout الخاص بلوحة التحكم */
body.public-view-body .page-wrapper,
body.public-view-body .main-content {
    display: block;
    padding: 0;
}

body.public-view-body .main-content .container {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

/* تنسيق أفضل للجدول في العرض العام */
.public-view-body .table-container {
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
    border-radius: 1rem;
    overflow: hidden;
}

.public-view-body .course-info {
    line-height: 1.4;
}
.public-view-body .course-info strong {
    font-size: 1.05rem;
    color: var(--text-color);
}
.public-view-body .course-info small {
    display: block;
    color: var(--secondary-color);
}
.public-view-body .course-info .group-name {
    display: block;
    font-style: normal;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 0.25rem;
}