:root {
    --primary-color: #FF6600; /* A vibrant Vista College Orange */
    --primary-hover: #CC5200; /* Darker orange for hover states */
    --secondary-color: #6c757d; /* A neutral grey for secondary elements */
    --success-color: #28a745; /* Standard green for success */
    --warning-color: #ffc107; /* Standard yellow for warning */
    --danger-color: #dc3545; /* Standard red for danger */
    --info-color: #17a2b8; /* Standard blue for info */

    --bg-primary: #ffffff; /* Pure white for main backgrounds */
    --bg-secondary: #f8f9fa; /* Very light grey for secondary backgrounds */
    --bg-tertiary: #e9ecef; /* Light grey for input fields, table headers etc. */

    --text-primary: #212529; /* Dark grey/black for primary text */
    --text-secondary: #6c757d; /* Medium grey for secondary text */
    --text-muted: #adb5bd; /* Lighter grey for muted text */
    --border-color: #dee2e6; /* Light grey for borders */

    --shadow-sm: 0 .125rem .25rem rgba(0,0,0,.075);
    --shadow-md: 0 .5rem 1rem rgba(0,0,0,.15);
    --shadow-lg: 0 1rem 3rem rgba(0,0,0,.175);

    --sidebar-width: 280px;
    --header-height: 70px;
    --border-radius: 8px;
}

/* Dark theme variables (kept distinct for contrast) */
[data-theme="dark"] {
    --primary-color: #ff8c00; /* Brighter orange for dark mode primary */
    --primary-hover: #e67e00;
    --secondary-color: #94a3b8;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #ef4444;
    --info-color: #60a5fa;

    --bg-primary: #212529; /* Dark background */
    --bg-secondary: #343a40; /* Slightly lighter dark background */
    --bg-tertiary: #495057; /* Even lighter dark background */

    --text-primary: #f8fafc;
    --text-secondary: #ced4da;
    --text-muted: #adb5bd;
    --border-color: #495057;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Layout for login and dashboard */
.login-container, .dashboard-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
}

.dashboard-container {
    align-items: flex-start;
    justify-content: flex-start;
}

/* Login Box */
.login-box {
    background-color: var(--bg-primary);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-header h1 i {
    margin-right: 0.5rem;
    color: var(--secondary-color);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Forms */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select,
.form-group textarea,
.search-filter-container .form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.search-filter-container .form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    /* For rgba, you might need to define an RGB version of primary-color in JS or a separate CSS variable */
    /* Example: --primary-color-rgb: 255, 102, 0; */
    /* box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.2); */
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2); /* Using direct rgba for now */
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-primary);
    border: 1px solid var(--primary-color);
}

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--bg-primary);
    border: 1px solid var(--danger-color);
}

.btn-danger:hover {
    background-color: #c82333; /* Slightly darker red */
    border-color: #bd2130;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

.btn-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0.5rem;
    margin-left: 0.5rem;
}
.btn-icon:hover {
    color: var(--primary-color);
}

.link-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    text-decoration: underline;
}

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

/* Error Messages */
.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    text-align: left;
    display: none;
}

.error-message.show {
    display: block;
}

/* Auth Toggle Text */
.auth-toggle-text {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-toggle-text .link-btn {
    margin-left: 0.5rem;
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    flex-grow: 1;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
}

.sidebar-header h3 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.sidebar-menu ul {
    list-style: none;
    padding: 0;
}

.sidebar-menu li {
    margin-bottom: 0.5rem;
}

.sidebar-menu a.menu-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-menu a.menu-item i {
    font-size: 1.1rem;
    margin-right: 1rem;
}

.sidebar-menu a.menu-item.active,
.sidebar-menu a.menu-item:hover {
    background-color: var(--primary-color);
    color: var(--bg-primary);
}

.sidebar-footer {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.sidebar-footer .btn {
    width: 100%;
}

.main-content {
    flex-grow: 1;
    padding: 1.5rem 2rem;
    background-color: var(--bg-secondary);
    display: flex;
    flex-direction: column;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-primary);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    height: var(--header-height);
}

.main-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-actions #currentUser {
    font-weight: 600;
    color: var(--primary-color);
    margin-right: 1rem;
}

/* Page Content */
.page {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
    flex-grow: 1;
}

.page.active {
    display: flex;
}

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

.page-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.page-content {
    background-color: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    flex-grow: 1;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.card {
    background-color: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.card h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.card p {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.recent-activity {
    text-align: left;
}

.recent-activity h3 {
    text-align: left;
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.activity-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 1rem;
    font-size: 1.1rem;
}

.activity-content p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.activity-content .activity-time {
    font-size: 0.85rem;
    color: var(--text-muted);
}


/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th, .data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.85rem;
}

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

.data-table td .btn {
    margin-right: 0.5rem;
}

/* Status Badges */
.status-badge {
    padding: 0.3em 0.7em;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    color: var(--bg-primary);
}

.status-pending { background-color: var(--warning-color); }
.status-approved { background-color: var(--success-color); }
.status-rejected { background-color: var(--danger-color); }
.status-completed { background-color: var(--primary-color); } /* Use primary color for completed */

/* Search and Filter */
.search-filter-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.search-filter-container .form-control {
    flex-grow: 1;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--bg-primary);
    margin: auto;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    position: relative;
}

.modal-content h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.close-button {
    color: var(--text-muted);
    font-size: 1.8rem;
    font-weight: bold;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.spinner {
    border: 8px solid rgba(255, 255, 255, 0.3);
    border-top: 8px solid var(--primary-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    min-width: 250px;
    max-width: 350px;
    border-left: 5px solid;
}

.toast.info { border-left-color: var(--info-color); }
.toast.success { border-left-color: var(--success-color); }
.toast.error { border-left-color: var(--danger-color); }
.toast.warning { border-left-color: var(--warning-color); }


/* Responsive adjustments */
@media (max-width: 768px) {
    .login-box {
        margin: 1rem;
    }
    .dashboard-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        min-height: auto;
        padding-bottom: 1rem;
        border-bottom: 1px solid var(--border-color);
    }
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        height: auto;
        padding-bottom: 1rem;
    }
    .header-actions {
        margin-top: 1rem;
        width: 100%;
        justify-content: space-between;
    }
    .main-content {
        padding: 1rem;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .search-filter-container {
        flex-direction: column;
    }
}

.language-selector-container {
    margin-right: 1rem;
}

.language-selector-container select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.language-selector-container select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2); /* Using direct rgba for now */
}