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

body {
    font-family: Arial, sans-serif;
    margin: 20px;
    line-height: 1.6;
    background-color: #f5f5f5;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    color: #333;
}

h1 {
    border-bottom: 2px solid #4CAF50;
    padding-bottom: 10px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="date"],
input[type="time"],
textarea,
select {
    width: 100%;
    padding: 10px 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.3);
}

button, 
input[type="submit"],
.button {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

input[type="submit"],
.button-primary {
    background-color: #667eea;
    color: white;
}

input[type="submit"]:hover,
.button-primary:hover {
    background-color: #5568d3;
}

.button-secondary {
    background-color: #e0e0e0;
    color: #333;
}

.button-secondary:hover {
    background-color: #d0d0d0;
}

.button-danger {
    background-color: #f44336;
    color: white;
}

.button-danger:hover {
    background-color: #da190b;
}

.edit-btn {
    background-color: #2196f3;
    color: white;
    padding: 6px 12px;
    font-size: 12px;
}

.edit-btn:hover {
    background-color: #1976d2;
}

.delete-btn {
    background-color: #f44336;
    color: white;
    padding: 6px 12px;
    font-size: 12px;
}

.delete-btn:hover {
    background-color: #da190b;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    margin-top: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

th {
    background-color: #667eea;
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 12px 15px;
    border-bottom: 1px solid #e0e0e0;
}

th, td {
    border: 1px solid #ddd;
}

tr:hover {
    background-color: #f5f5f5;
}

.alert,
.error,
.success {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-weight: 500;
    border-left: 4px solid;
}

.alert-error,
.error {
    background-color: #ffebee;
    color: #c62828;
    border-left-color: #c62828;
}

.alert-success,
.success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left-color: #2e7d32;
}

.pagination {
    display: flex;
    gap: 5px;
    justify-content: center;
    margin: 20px 0;
}

.pagination a,
.pagination span {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #667eea;
    font-weight: 500;
    display: inline-block;
}

.pagination a:hover {
    background-color: #f0f0f0;
}

.pagination .current {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

.login-form {
    border: 1px solid #ddd;
    padding: 20px;
    border-radius: 5px;
    max-width: 400px;
    margin: 50px auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.login-form h1 {
    margin-top: 0;
}

.actions {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
}

.actions h3 {
    margin-top: 0;
}

.actions a {
    display: inline-block;
    margin-right: 10px;
    margin-bottom: 10px;
    padding: 10px 16px;
    background-color: #008CBA;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.actions a:hover {
    background-color: #007399;
}

.actions a.logout {
    background-color: #f44336;
}

.actions a.logout:hover {
    background-color: #da190b;
}

nav {
    background-color: #f2f2f2;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}

nav a {
    margin-right: 15px;
    display: inline-block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 28px;
    margin-bottom: 5px;
    border: none;
    padding: 0;
}

.header-right {
    text-align: right;
}

.header-right p {
    font-size: 14px;
    opacity: 0.9;
}

.nav-tabs {
    display: flex;
    border-bottom: 1px solid #e0e0e0;
    background-color: #fafafa;
}

.nav-tab {
    padding: 15px 25px;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 16px;
    color: #666;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.nav-tab:hover {
    background-color: #f0f0f0;
    color: #667eea;
}

.nav-tab.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.content {
    padding: 30px;
}

.form-section {
    background: #fafafa;
    padding: 25px;
    border-radius: 6px;
    margin-bottom: 30px;
    border: 1px solid #e0e0e0;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.button-group {
    display: flex;
    gap: 10px;
    justify-content: flex-start;
}

.table-container {
    overflow-x: auto;
    margin-bottom: 20px;
}

.action-buttons {
    display: flex;
    gap: 8px;
}

.action-buttons a,
.action-buttons form {
    margin: 0;
}

.footer {
    text-align: center;
    padding: 20px;
    color: #999;
    font-size: 12px;
    border-top: 1px solid #e0e0e0;
    background-color: #fafafa;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #999;
}

.required {
    color: #f44336;
}

.form-hint {
    font-size: 12px;
    color: #999;
    margin-top: 5px;
}

@media (max-width: 768px) {
    body {
        margin: 10px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    table, th, td {
        font-size: 12px;
    }
    
    input[type="text"],
    input[type="password"],
    input[type="email"],
    input[type="date"],
    input[type="time"] {
        font-size: 16px;
    }
    
    .login-form {
        margin: 20px auto;
        padding: 15px;
    }
    
    .actions a {
        display: block;
        margin-right: 0;
        margin-bottom: 8px;
    }
    
    .header {
        flex-direction: column;
        text-align: center;
    }
    
    .action-buttons {
        flex-wrap: wrap;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

nav {
    background-color: #f2f2f2;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}

nav a {
    margin-right: 15px;
    display: inline-block;
}