/* ===============================
   Global Styles - Student Management System
   =============================== */

/* -------------------------------
   Base Styles
---------------------------------*/
body {
    font-family: 'Poppins', Arial, sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    overflow-x: hidden;
}

/* -------------------------------
   Login Page Styles
---------------------------------*/
.login-body {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* -------------------------------
   Top Bar
---------------------------------*/
.top-bar {
    background: #0d6efd;
    color: #fff;
    font-size: 14px;
}

.top-bar a {
    color: #fff;
    text-decoration: none;
}

/* -------------------------------
   Navbar
---------------------------------*/
.navbar {
    background-color: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

/* -------------------------------
   Dropdown Menu
---------------------------------*/
.dropdown-menu {
    background-color: rgba(0, 0, 0, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

.dropdown-item {
    color: #fff;
    padding: 10px 15px;
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background-color: rgba(118, 75, 162, 0.8);
    color: #fff;
}

.dropdown-item i {
    width: 20px;
    text-align: center;
}

.dropdown-toggle::after {
    margin-left: 8px;
}

.navbar-logo h5,
.navbar-logo small {
    margin: 0;
    color: #fff;
}

.navbar-logo small {
    color: #ccc;
}

.hamburger {
    font-size: 24px;
    cursor: pointer;
    color: #fff;
}

/* -------------------------------
   Sidebar
---------------------------------*/
.sidebar {
    height: 100vh;
    width: 250px;
    position: fixed;
    top: 0;
    left: -250px;
    background: #222;
    color: #fff;
    transition: 0.3s;
    z-index: 1050;
    padding-top: 70px;
}

.sidebar a {
    display: block;
    color: #fff;
    padding: 14px 20px;
    text-decoration: none;
    font-weight: 500;
    transition: 0.3s;
}

.sidebar a:hover {
    background: linear-gradient(90deg, #0d6efd, #6610f2);
    color: #fff;
}

.sidebar .close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 30px;
    cursor: pointer;
}

/* -------------------------------
   Main Content
---------------------------------*/
#main-content {
    transition: margin-left 0.3s;
    padding: 20px;
}

/* -------------------------------
   Cards
---------------------------------*/
.card {
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.dashboard-card {
    position: relative;
    overflow: hidden;
    color: #fff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

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

.card-icon {
    position: absolute;
    right: 20px;
    bottom: 20px;
    font-size: 2rem;
    opacity: 0.2;
}

.glass-card {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    color: #fff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
}

.card-header {
    font-weight: bold;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
}

.card-header .card-title,
.card-title {
    color: #fff;
}

/* -------------------------------
   Dashboard Gradients
---------------------------------*/
.gradient-blue {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
}

.gradient-green {
    background: linear-gradient(135deg, #1e6f5c, #28a745);
}

.gradient-yellow {
    background: linear-gradient(135deg, #f0ad4e, #ffc107);
}

.gradient-purple {
    background: linear-gradient(135deg, #764ba2, #9a5edd);
}

/* -------------------------------
   Buttons
---------------------------------*/
.btn-primary {
    transition: all 0.3s ease-in-out;
    box-shadow: 0 4px 10px rgba(118, 75, 162, 0.3);
}

.btn-primary:hover {
    background-color: #5a3e99;
    box-shadow: 0 0 20px rgba(118, 75, 162, 0.8), 0 0 40px rgba(118, 75, 162, 0.6);
    transform: translateY(-2px);
}

.btn-outline-light {
    border: 1px solid #fff;
    color: #fff;
}

.btn-outline-light:hover {
    background-color: #0d6efd;
    border-color: #0d6efd;
    color: #fff;
}

.btn-gradient {
    background: linear-gradient(135deg, #764baa, #9a5edd);
    border: none;
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    transition: all 0.3s;
}

.btn-gradient:hover {
    background: linear-gradient(135deg, #9a5edd, #764baa);
    box-shadow: 0 0 15px rgba(118, 75, 162, 0.7);
}

/* -------------------------------
   University Logo
---------------------------------*/
.univ-logo {
    display: block;
    margin: 10px auto;
}

/* -------------------------------
   Page Wrapper
---------------------------------*/
.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.flex-grow-1 {
    flex: 1 0 auto;
}

/* -------------------------------
   Responsive Design
---------------------------------*/
@media (max-width: 768px) {
    #main-content {
        margin-left: 0 !important;
    }
    
    .sidebar {
        width: 100%;
        left: -100%;
    }
}

/* -------------------------------
   Form Enhancements
---------------------------------*/
.form-control:focus {
    border-color: #764baa;
    box-shadow: 0 0 8px rgba(118, 75, 162, 0.7);
}

/* -------------------------------
   Table Enhancements
---------------------------------*/
.table-dark {
    color: #fff;
}

.table-dark th {
    background-color: rgba(0, 0, 0, 0.3);
    color: #fff;
}

.table-dark td {
    color: #fff;
}

/* -------------------------------
   Modal Enhancements
---------------------------------*/
.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, #764baa, #9a5edd);
    color: #fff;
    border-bottom: none;
}

/* -------------------------------
   Alert Enhancements
---------------------------------*/
.alert {
    border-radius: 10px;
    border: none;
}

/* -------------------------------
   Badge Enhancements
---------------------------------*/
.badge {
    border-radius: 20px;
    font-weight: 600;
}

/* -------------------------------
   Animation Classes
---------------------------------*/
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* -------------------------------
   Utility Classes
---------------------------------*/
.text-shadow {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* -------------------------------
   DataTables Customization
---------------------------------*/
.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter,
.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_processing,
.dataTables_wrapper .dataTables_paginate {
    color: #fff;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: #764baa !important;
    color: #fff !important;
    border-radius: 0.35rem;
}

.dataTables_wrapper .dataTables_filter input {
    background-color: rgba(255, 255, 255, 0.9);
    color: #333;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.dataTables_wrapper .dataTables_length select {
    background-color: rgba(255, 255, 255, 0.9);
    color: #333;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* -------------------------------
   Profile Pictures
---------------------------------*/
.profile-picture {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.profile-picture:hover {
    border-color: rgba(118, 75, 162, 0.8);
    transform: scale(1.05);
}

.profile-picture-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.profile-picture-medium {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.profile-picture-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.profile-picture-upload {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.profile-picture-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.profile-picture-preview {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px dashed rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.profile-picture-preview:hover {
    border-color: rgba(118, 75, 162, 0.8);
    background: rgba(118, 75, 162, 0.1);
}

.profile-picture-preview img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.profile-picture-placeholder {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    text-align: center;
}

.profile-picture-upload-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 12px;
    margin-top: 5px;
    text-align: center;
}

/* Profile picture in tables */
.table .profile-picture {
    margin-right: 10px;
    vertical-align: middle;
}

/* Profile picture in cards */
.card .profile-picture {
    float: left;
    margin-right: 15px;
    margin-bottom: 10px;
}

/* Profile picture in forms */
.form-group .profile-picture-preview {
    margin-bottom: 10px;
}

/* Profile picture upload area */
.upload-area {
    border: 2px dashed #0d6efd;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    background: rgba(13, 110, 253, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.upload-area:hover {
    border-color: #0d6efd;
    background: rgba(13, 110, 253, 0.2);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #28a745;
    background: rgba(40, 167, 69, 0.2);
}

.upload-icon {
    font-size: 48px;
    color: #0d6efd;
    margin-bottom: 10px;
}

.upload-text {
    color: #333;
    font-size: 14px;
    margin-bottom: 5px;
    font-weight: 500;
}

.upload-hint {
    color: #666;
    font-size: 12px;
}

.upload-filename {
    color: #28a745;
    font-size: 12px;
    margin-top: 5px;
    font-weight: 500;
}

.upload-actions {
    margin-top: 10px;
    display: flex;
    gap: 10px;
    justify-content: center;
}

.upload-remove-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-remove-btn:hover {
    background: #c82333;
    transform: translateY(-1px);
}

/* Print Styles
---------------------------------*/
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    .profile-picture {
        border: 1px solid #ccc !important;
    }
}

/* Hover effect for student rows */
.student-row:hover {
    cursor: pointer;
    background-color: #f1f1f1;
}

/* Profile images in table */
.table img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 50%;
}

/* Responsive table for small screens */
.table-responsive {
    overflow-x: auto;
}

/* Modal images */
.modal img {
    max-width: 100%;
    height: auto;
    border-radius: 50%;
}

/* Buttons spacing in modals or card actions */
.btn-group .btn {
    margin: 2px 2px;
}

/* Optional: adjust badge for mobile */
.badge {
    font-size: 0.85rem;
}

/* Optional: change table row pointer for mobile devices */
@media (max-width: 768px) {
    .student-row:hover {
        background-color: #f9f9f9;
    }
}
/* End of global.css */
/* Sidebar base styles */
/* ===============================
   Sidebar Styles
   =============================== */

/* Sidebar base styles */
/* ===============================
   Sidebar Styles
   =============================== */

/* Base Sidebar */
#mySidebar {
    position: fixed;
    top: 0;
    left: -280px; /* hidden by default */
    width: 280px;
    height: 100vh;
    background-color: #1c1c1c;
    color: #ccc;
    overflow-y: auto;
    transition: left 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 1050;
    box-shadow: 3px 0 15px rgba(0,0,0,0.3);
}

#mySidebar.open {
    left: 0;
}

/* Sidebar links */
#mySidebar a {
    display: block;
    padding: 12px 20px;
    color: #ccc;
    text-decoration: none;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

#mySidebar a:hover,
#mySidebar a.active {
    background-color: #343434;
    border-left: 3px solid #0d6efd;
    color: #fff;
}

/* Profile Section */
#mySidebar .sidebar-profile {
    text-align: center;
    padding: 20px;
    border-bottom: 1px solid #444;
}

#mySidebar .sidebar-profile i {
    font-size: 4rem;
    margin-bottom: 8px;
    color: #ccc;
}

/* Logout Section */
#mySidebar .sidebar-bottom {
    border-top: 1px solid #444;
    padding: 15px 20px;
}

#mySidebar .sidebar-bottom a {
    color: #dc3545;
    font-weight: 600;
}

/* Close button */
#mySidebar .close-btn {
    display: none;
    position: absolute;
    top: 10px;
    right: 10px;
    color: #fff;
    font-size: 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
}

/* Main content margin for desktop */
#main-content.sidebar-open {
    margin-left: 280px;
    transition: margin-left 0.3s ease;
}

/* Overlay for mobile (optional) */
#sidebarOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: 1040;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#sidebarOverlay.active {
    display: block;
    opacity: 1;
}

/* -------------------------------
   Responsive for mobile
---------------------------------*/
@media (max-width: 768px) {
    #mySidebar {
        width: 50%; /* half screen */
        left: -50%; /* hide by default */
    }

    #mySidebar.open {
        left: 0;
    }

    #mySidebar .close-btn {
        display: block;
    }

    #main-content.sidebar-open {
        margin-left: 0; /* do not shift content */
    }
}

/* Smooth hover for links */
#mySidebar a {
    transition: all 0.3s ease;
}

/* Scrollbar customization */
#mySidebar::-webkit-scrollbar {
    width: 6px;
}

#mySidebar::-webkit-scrollbar-thumb {
    background-color: rgba(118,75,162,0.5);
    border-radius: 3px;
}

#mySidebar::-webkit-scrollbar-track {
    background-color: rgba(0,0,0,0.1);
}

/* Optional: add shadow when open on mobile */
@media (max-width: 768px) {
    #mySidebar.open {
        box-shadow: 3px 0 20px rgba(0,0,0,0.5);
    }
}

/* Optional: profile hover effect */
#mySidebar .sidebar-profile:hover i {
    color: #0d6efd;
    transform: scale(1.05);
    transition: all 0.3s ease;
}

/* End of sidebar styles */
/* Sidebar */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: -260px;
    transition: left 0.3s ease;
    z-index: 1045;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar .nav-link {
    color: #ccc;
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    border-radius: 0.375rem;
    transition: background-color 0.2s ease;
}

.sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar .nav-link.active {
    background-color: #495057;
    color: #fff;
    font-weight: 600;
}

#sidebarOverlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    z-index: 1040;
}

#sidebarOverlay.active {
    display: block;
}