body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    margin: 0;
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: #343a40;
    color: #fff;
    height: 100vh;
    position: fixed;
    transition: all 0.3s;
}

.sidebar-header {
    padding: 20px;
    background-color: #3f474e;
    text-align: center;
}

.sidebar-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

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

.sidebar-menu li a {
    display: block;
    padding: 15px 20px;
    color: #c2c7d0;
    text-decoration: none;
    transition: 0.3s;
    border-bottom: 1px solid #3f474e;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background-color: #007bff;
    color: #fff;
}

/* Main Content */
.main-content {
    margin-left: 250px;
    width: calc(100% - 250px);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background-color: #fff;
    padding: 15px 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header .title {
    font-size: 1.2rem;
    font-weight: 500;
}

.header .user-info a {
    color: #dc3545;
    text-decoration: none;
    font-weight: 500;
}

/* Dashboard Cards */
.content {
    padding: 30px;
}

.card-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.05);
    padding: 20px;
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.card h3 {
    margin: 0;
    font-size: 2rem;
    color: #333;
}

.card p {
    color: #777;
    margin: 5px 0 0;
}

/* Tables */
.table-container {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.05);
    padding: 20px;
    margin-top: 20px;
}

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

table th,
table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.btn {
    padding: 5px 10px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    color: #fff;
    display: inline-block;
}

.btn-primary {
    background-color: #007bff;
}

.btn-danger {
    background-color: #dc3545;
}

.btn-success {
    background-color: #28a745;
}

/* Login */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #e9ecef;
}

.login-box {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 350px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-sizing: border-box;
    /* Important for padding */
}

.login-btn {
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}