body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

h1, h2, h3 {
    margin-top: 0;
    margin-bottom: 1rem;
}

button {
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 14px;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3;
}

input, select, textarea {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 100%;
    box-sizing: border-box;
    font-family: inherit;
}

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

.auth-card {
    max-width: 400px;
    margin: 100px auto;
}

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

.filters-row {
    display: flex;
    gap: 15px;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-top: 20px;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

.chart-container {
    padding: 10px;
}

.table-responsive {
    overflow-x: auto;
}

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

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

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

tr:hover {
    background-color: #f9f9f9;
}

.error-msg {
    color: #dc3545;
    margin-bottom: 15px;
    font-size: 0.9em;
}

.toggle-auth {
    text-align: center;
    margin-top: 15px;
}

.toggle-auth button {
    background: none;
    color: #007bff;
    padding: 0;
    text-decoration: underline;
}

.toggle-auth button:hover {
    background: none;
    color: #0056b3;
}