:root {
    --primary-color: #6a6ee0; /* Modern Purple-Blue */
    --primary-dark-color: #5355c0;
    --secondary-color: #00bcd4; /* Vibrant Cyan */
    --background-color: #f0f2f5; /* Soft light grey */
    --card-background: #ffffff;
    --text-color: #2c3e50; /* Dark desaturated blue */
    --light-text-color: #7f8c8d;
    --border-color: #e0e4e8;
    --shadow-color: rgba(0, 0, 0, 0.1); /* More subtle shadow */
    --success-bg: #d4edda;
    --success-color: #155724;
    --success-border: #c3e6cb;
    --error-bg: #f8d7da;
    --error-color: #721c24;
    --error-border: #f5c6cb;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
    overflow: hidden; /* Prevent body scroll, content area will scroll */
}

#app-container {
    display: flex;
    width: 100%;
    height: 100vh;
}

/* Login Screen */
#login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#login-screen.active {
    opacity: 1;
    visibility: visible;
}

#login-screen.hidden {
    display: none;
}

.login-card {
    background-color: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h2 {
    color: var(--primary-color);
    font-size: 2.2em;
    margin-bottom: 30px;
}

.login-card .form-group {
    margin-bottom: 25px;
    text-align: left;
}

.login-card .btn {
    width: 100%;
    margin-top: 20px;
}

.login-info {
    margin-top: 20px;
    font-size: 0.9em;
    color: var(--light-text-color);
}

/* Sidebar */
#sidebar {
    width: 250px;
    background-color: var(--card-background);
    padding: 20px;
    box-shadow: 2px 0 15px var(--shadow-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto; /* Allow sidebar to scroll if content overflows */
}

#sidebar .logo {
    text-align: center;
    margin-bottom: 30px;
}

#sidebar .logo h1 {
    color: var(--primary-color);
    font-size: 2em; /* Slightly larger */
    font-weight: 700; /* Bolder */
    letter-spacing: 0.5px;
}

#sidebar nav ul {
    list-style: none;
}

#sidebar nav ul li {
    margin-bottom: 10px;
}

#sidebar nav ul li a {
    display: flex;
    align-items: center;
    padding: 14px 18px; /* Slightly more padding */
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500; /* More defined */
    border-radius: 10px; /* Softer rounded corners */
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

#sidebar nav ul li a:hover:not(.disabled) {
    background-color: rgba(0, 188, 212, 0.1); /* Secondary color with transparency */
    color: var(--text-color);
    transform: translateX(5px);
}

#sidebar nav ul li a.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 10px rgba(106, 110, 224, 0.3); /* Shadow for active state */
}

#sidebar nav ul li a.active:hover {
    background-color: var(--primary-dark-color); /* Darker on hover for active */
    color: white;
    transform: translateX(0); /* No transform on active hover */
}

#sidebar nav ul li a.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--background-color);
    color: var(--light-text-color);
}

#sidebar nav ul li a.disabled:hover {
    transform: none;
    background-color: var(--background-color);
}

#sidebar nav ul li a span {
    margin-right: 12px; /* More space for emojis */
    font-size: 1.2em; /* Larger emojis */
}

#logout-btn {
    margin-top: auto; /* Pushes button to the bottom */
    width: calc(100% - 40px); /* Adjust to padding */
    align-self: center;
}

/* Main Content */
#main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: 25px 35px; /* More padding */
    overflow-y: auto; /* Allow main content to scroll */
}

#main-content header {
    background-color: var(--card-background);
    padding: 25px 35px; /* Matches main content padding */
    margin: -25px -35px 25px -35px; /* Adjust to full width within padding */
    box-shadow: 0 4px 15px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
    border-radius: 0 0 8px 8px; /* Rounded bottom corners for header */
}

#main-content header h2 {
    font-size: 2em; /* Larger header */
    color: var(--primary-color);
    font-weight: 700;
}

#app-module-content {
    flex-grow: 1;
    background-color: var(--card-background);
    padding: 30px; /* More internal padding */
    border-radius: 10px; /* Softer rounded corners */
    box-shadow: 0 6px 20px var(--shadow-color); /* Stronger shadow */
}

/* Common elements for modules */
.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px; /* More spacing */
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color); /* Thicker border */
}

.module-header h3 {
    font-size: 1.8em; /* Larger module titles */
    color: var(--primary-color);
    font-weight: 700;
}

.btn {
    padding: 12px 25px; /* More padding */
    border: none;
    border-radius: 8px; /* Softer corners */
    cursor: pointer;
    font-size: 1.05em; /* Slightly larger font */
    font-weight: 600; /* Bolder text */
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    letter-spacing: 0.2px;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(106, 110, 224, 0.4);
}

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

.btn-secondary:hover {
    background-color: #00a4bd; /* Slightly darker cyan */
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 188, 212, 0.3);
}

.btn-danger {
    background-color: #ef5350; /* Softer red */
    color: white;
}

.btn-danger:hover {
    background-color: #d32f2f;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(239, 83, 80, 0.4);
}

.form-group {
    margin-bottom: 20px; /* More spacing */
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600; /* Bolder label */
    color: var(--text-color); /* Darker label for better contrast */
    font-size: 0.95em;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px; /* More padding */
    border: 1px solid var(--border-color);
    border-radius: 8px; /* Softer corners */
    font-family: 'Poppins', sans-serif;
    font-size: 1.05em; /* Slightly larger font */
    color: var(--text-color);
    background-color: var(--background-color); /* Light grey input background */
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(106, 110, 224, 0.2); /* Stronger focus halo */
    outline: none;
}

textarea {
    resize: vertical;
    min-height: 100px; /* Taller textareas */
}

.data-table {
    width: 100%;
    border-collapse: separate; /* Allows border-radius on cells */
    border-spacing: 0; /* Remove default spacing */
    margin-top: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08); /* Shadow for table */
    border-radius: 10px; /* Overall table rounded corners */
    overflow: hidden; /* Ensures child elements respect border-radius */
}

.data-table th, .data-table td {
    border: none; /* Remove individual cell borders */
    padding: 15px 20px; /* More padding */
    text-align: left;
}

.data-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.95em;
    position: sticky; /* Make headers sticky */
    top: 0;
    z-index: 20;
}

/* Rounded corners for table headers */
.data-table thead tr:first-child th:first-child {
    border-top-left-radius: 10px;
}
.data-table thead tr:first-child th:last-child {
    border-top-right-radius: 10px;
}

.data-table tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:nth-child(even) {
    background-color: #f9fbfe; /* Lighter even rows */
}

.data-table tbody tr:hover {
    background-color: #eef2f7; /* Subtle hover effect */
}

.data-table .actions {
    display: flex;
    gap: 10px; /* More space between action buttons */
}

.data-table .actions .btn {
    padding: 8px 14px; /* Adjust button size within table */
    font-size: 0.8em;
    font-weight: 500;
}

.card {
    background-color: var(--card-background);
    padding: 30px; /* More padding */
    border-radius: 10px; /* Softer rounded corners */
    box-shadow: 0 6px 20px var(--shadow-color); /* Stronger shadow */
    margin-bottom: 25px; /* More spacing */
}

.card h4 {
    font-size: 1.5em; /* Larger card titles */
    color: var(--text-color);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px dashed var(--border-color); /* Dashed separator */
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Larger min width */
    gap: 25px; /* More gap */
    margin-top: 25px;
}

.grid-item {
    background-color: var(--card-background);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.grid-item h4 {
    color: var(--primary-color);
    font-size: 1.4em;
    margin-bottom: 15px;
    border-bottom: none; /* No border for dashboard cards */
    padding-bottom: 0;
}

.grid-item p {
    font-size: 2.5em; /* Large numbers */
    font-weight: 700;
    color: var(--text-color);
    margin-top: 10px;
}

.grid-item .small-text {
    font-size: 0.9em;
    color: var(--light-text-color);
    margin-top: 5px;
}

.alert {
    padding: 18px; /* More padding */
    border-radius: 8px; /* Softer corners */
    margin-bottom: 20px;
    font-weight: 600;
    opacity: 0; /* Start hidden for animation */
    transform: translateY(-10px); /* Start slightly above */
    animation: fadeInSlideDown 0.4s ease-out forwards;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

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

@keyframes fadeInSlideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    display: none !important;
}

.search-container {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    align-items: flex-end; /* Align button to bottom of input */
}

.search-container .form-group {
    flex-grow: 1;
    margin-bottom: 0; /* Remove default margin from form-group */
}

.search-container input {
    margin-bottom: 0; /* Remove default margin from input */
}

/* New styles for user management module */
.permission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    padding: 10px; /* Adjusted padding */
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-color);
}

.permission-grid .checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px; /* Adjusted padding */
}

.permission-grid .checkbox-group label {
    margin-bottom: 0;
    font-weight: 400;
    cursor: pointer;
}

.permission-grid .checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* Specific small text style for form hints */
.form-group .small-text {
    font-size: 0.85em;
    color: var(--light-text-color);
    margin-top: 5px;
    display: block;
}

.no-data {
    text-align: center;
    color: var(--light-text-color);
    padding: 20px;
    font-style: italic;
}