:root {
    --background-color: #ffffff;
    --container-background: #f8f9fa;
    --text-color: #000000;
    --label-color: #333333;
    --button-background: #000000;
    --button-hover-background: #333333;
    --button-text-color: #ffffff;
    --border-color: #000000;
    --input-background: #ffffff;
    --textarea-background: #ffffff;
    --delete-button-background: #dc3545;
    --delete-button-hover-background: #c82333;
    --view-button-background: #28a745;
    --view-button-hover-background: #218838;
}

* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    padding: 20px;
    margin: 0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--container-background);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1.job-title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
}

h2 {
    color: var(--label-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--button-background);
}

.form-section {
    margin-bottom: 30px;
    padding: 20px;
    background-color: white;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.form-field {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--label-color);
}

input[type="text"],
input[type="email"],
input[type="date"],
input[type="number"],
textarea {
    padding: 12px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-size: 16px;
    background-color: var(--input-background);
    color: var(--text-color);
}

input:disabled {
    background-color: #e9ecef;
    cursor: not-allowed;
}

textarea {
    resize: vertical;
    min-height: 80px;
    background-color: var(--textarea-background);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 15px 0;
}

.form-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.line-item {
    background-color: #f9f9f9;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.line-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-weight: bold;
    color: var(--button-background);
}

.remove-item-btn {
    background-color: var(--delete-button-background);
    color: var(--button-text-color);
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.remove-item-btn:hover {
    background-color: var(--delete-button-hover-background);
}

.add-item-btn {
    background-color: var(--button-background);
    color: var(--button-text-color);
    padding: 12px 24px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    width: 100%;
    margin-top: 10px;
}

.add-item-btn:hover {
    background-color: var(--button-hover-background);
}

.submit-btn,
.backbutton,
.view-invoice-btn {
    background-color: var(--button-background);
    color: var(--button-text-color);
    padding: 12px 24px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s ease;
    width: 100%;
}

.submit-btn:hover,
.backbutton:hover,
.view-invoice-btn:hover {
    background-color: var(--button-hover-background);
}

.show-invoices-btn {
    background-color: #6c757d;
    color: var(--button-text-color);
    padding: 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s ease;
    width: 100%;
    margin-top: 10px;
}

.show-invoices-btn:hover {
    background-color: #5a6268;
}

.button-wrapper {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.button-wrapper button {
    flex: 1;
}

.error {
    border: 2px solid red !important;
}

.error:focus {
    outline-color: red;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin-top: 20px;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    background-color: white;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

th {
    background-color: var(--button-background);
    color: var(--button-text-color);
    font-weight: bold;
}

tr:nth-child(even) {
    background-color: var(--container-background);
}

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

.view-btn {
    background-color: var(--view-button-background);
    color: var(--button-text-color);
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
    margin-right: 5px;
}

.view-btn:hover {
    background-color: var(--view-button-hover-background);
}

.delete-btn {
    background-color: var(--delete-button-background);
    color: var(--button-text-color);
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.delete-btn:hover {
    background-color: var(--delete-button-hover-background);
}

/* Search and Filter Styles */
.search-container {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

#searchInput {
    flex-grow: 1;
    padding: 12px;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    font-size: 16px;
    background-color: var(--input-background);
    color: var(--text-color);
}

#searchButton,
#clearSearchButton {
    background-color: var(--button-background);
    color: var(--button-text-color);
    padding: 12px 20px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

#searchButton:hover {
    background-color: var(--button-hover-background);
}

#clearSearchButton {
    background-color: var(--delete-button-background);
}

#clearSearchButton:hover {
    background-color: var(--delete-button-hover-background);
}

.filter-select-container {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

#filterSelect {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--button-background);
    color: var(--button-text-color);
    padding: 12px 40px 12px 20px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    background-image: url('data:image/svg+xml;utf8,<svg fill="white" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 10px center;
}

#filterSelect:hover,
#filterSelect:focus {
    background-color: var(--button-hover-background);
    outline: none;
}

#filterSelect option {
    background-color: var(--button-background);
    color: var(--button-text-color);
}

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.pagination-btn {
    background-color: var(--button-background);
    color: var(--button-text-color);
    border: none;
    padding: 10px 15px;
    margin: 0 10px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--button-hover-background);
}

.pagination-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#pageInfo {
    font-size: 14px;
    margin: 0 10px;
}

/* Loading Bar */
.loading-bar {
    width: 100%;
    height: 5px;
    background-color: var(--button-background);
    position: relative;
    animation: loading-animation 2s infinite;
}

@keyframes loading-animation {
    0% { width: 0%; }
    50% { width: 100%; }
    100% { width: 0%; }
}

/* Submit Page */
#submitpage {
    text-align: center;
}

/* Responsive Design */
@media screen and (max-width: 600px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 15px;
    }

    h1.job-title {
        font-size: 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .search-container {
        flex-direction: column;
        align-items: stretch;
    }

    #searchInput,
    #searchButton,
    #clearSearchButton {
        width: 100%;
        margin-bottom: 10px;
    }

    .filter-select-container {
        flex-direction: column;
        align-items: stretch;
    }

    #filterSelect {
        width: 100%;
    }

    .button-wrapper {
        flex-direction: column;
    }

    .table-container {
        overflow-x: scroll;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 8px;
    }
}