/* Global Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #c0392b;
}

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

body {
    font-family: 'Open Sans', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    max-height: 60px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.8rem;
    margin: 0;
}

/* Navigation */
nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--secondary-color);
}

/* Main Content */
main {
    padding: 2rem 0;
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Form Styles */
.form-container {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin: 0 auto;
}

.form-title {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.small-text {
    font-size: 0.8rem;
    color: #666;
    font-style: italic;
    margin-top: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--secondary-color);
    outline: none;
}

.radio-group,
.checkbox-group {
    margin-top: 0.5rem;
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.radio-option input,
.checkbox-option input {
    margin-right: 0.5rem;
    width: auto;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
    text-decoration: none;
}

.btn:hover {
    background-color: #2980b9;
}

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

.btn-primary:hover {
    background-color: #1a2530;
}

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

.btn-success:hover {
    background-color: #219a52;
}

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

.btn-danger:hover {
    background-color: #a12a1e;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin-bottom: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

table tr:nth-child(even) {
    background-color: #f9f9f9;
}

table tr:hover {
    background-color: #f0f0f0;
}

/* Admin Panel */
.admin-container {
    display: flex;
    min-height: calc(100vh - 140px);
}

.sidebar {
    width: 250px;
    background-color: var(--dark-color);
    padding: 1.5rem 0;
    color: white;
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1.5rem;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 0.25rem;
}

.sidebar-nav a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.main-content {
    flex: 1;
    padding: 2rem;
    background-color: #f5f5f5;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-title {
    color: var(--primary-color);
}

/* Alert Messages */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.footer-logo {
    margin-bottom: 1rem;
}

.footer-logo img {
    max-height: 50px;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer-links a:hover {
    text-decoration: underline;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        text-align: center;
    }
    
    .logo {
        margin-bottom: 1rem;
        justify-content: center;
    }
    
    nav ul {
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 0.75rem;
    }
    
    .admin-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        padding: 1rem 0;
    }
    
    .sidebar-header {
        padding: 0 1rem 1rem;
    }
    
    .sidebar-nav a {
        padding: 0.5rem 1rem;
    }
}

/* Sidebar Heading - Non-clickable section title */
.sidebar-heading {
    font-weight: 700;
    color: rgba(255, 255, 255, 0.8);
    padding: 10px 15px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 15px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    pointer-events: none;
    background-color: transparent;
}

/* Disable hover effect on section headers */
.sidebar-nav a.sidebar-heading:hover {
    background-color: transparent;
    color: rgba(255, 255, 255, 0.8);
    cursor: default;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    position: relative;
    background-color: #fff;
    margin: 10% auto;
    padding: 0;
    width: 70%;
    max-width: 800px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    animation: modalFadeIn 0.3s;
}

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

.modal-header {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem;
    border-top: 1px solid #e9ecef;
    display: flex;
    justify-content: flex-end;
}

.close {
    font-size: 1.5rem;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
}

.close:hover {
    color: #333;
}

.modal-row {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.modal-column {
    flex: 1;
    min-width: 250px;
    padding-right: 1rem;
}

.modal-column h4 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.filter-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
}

.filter-form {
    display: flex;
    align-items: center;
}

.filter-group {
    display: flex;
    gap: 10px;
}

.filter-group select {
    width: auto;
    min-width: 150px;
}

.student-count {
    font-weight: 500;
    color: #6c757d;
}

.search-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
}

.search-container input {
    width: 250px;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-actions {
    display: flex;
    gap: 10px;
}

/* Waitlist Stats */
.waitlist-stats {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.waitlist-stats h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.stats-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.stats-column {
    flex: 1;
    min-width: 250px;
}

.stats-column h4 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.stats-list {
    list-style: none;
    padding: 0;
}

.stats-list li {
    padding: 0.3rem 0;
    color: #555;
}

/* Sortable Tables */
.sortable {
    cursor: pointer;
    position: relative;
}

.sortable:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.sort-icon {
    margin-left: 0.5rem;
    font-size: 0.8rem;
}

/* Date column special styling */
.date-column {
    min-width: 120px;
}