*, *::before, *::after {
    box-sizing: border-box;
}
:root {
    --color-bg: #fff;
    --color-text: #222;
    --color-header: #f8f9fa;
    --color-card: #fff;
    --color-border: #dee2e6;
    --color-link: #007bff;
    --color-btn: #007bff;
    --color-btn-hover: #0056b3;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-table-header: #f1f3f5;
    --color-table-row: #fff;
    --color-badge: #222;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg);
    margin: 0;
    color: var(--color-text);
}
header {
    background-color: var(--color-header);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
}
.header-right {
    margin-left: auto;
}
.admin-dropdown {
    position: relative;
    display: inline-block;
}
.admin-btn {
    background-color: transparent;
    border: 2px solid #6b2c7a;
    border-radius: 5px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 1rem;
}
.admin-btn span {
    padding-bottom: 2px;
    border-bottom: 2px solid #8a2be2; /* Purple underline */
}
.arrow-down {
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #333;
    margin-left: 8px;
}
.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: var(--color-header);
    color: var(--color-text);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}
.dropdown-content a {
    color: var(--color-link) !important;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}
.dropdown-content a:hover {
    background-color: var(--color-border);
}
.show-dropdown {
    display: block;
}
.logo {
    height: 40px;
    margin-right: 1.5rem;
}
header h1 {
    font-size: 1.5rem;
    margin: 0;
    font-weight: 600;
}
main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    min-height: calc(100vh - 120px);
    background: none;
    color: var(--color-text);
}
.upload-container {
    background-color: var(--color-card);
    padding: 2.5rem;
    border-radius: 8px;
    border: 2px solid #6b2c7a;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 1600px;
    width: 100%;
}
.batch-controls {
    max-width: 1600px;
    width: 100%;
    margin: 2rem auto 0;
    text-align: left;
}
.upload-container h2 {
    margin-top: 0;
    font-size: 1.75rem;
    font-weight: 600;
}
.upload-container p {
    color: #666;
    margin-bottom: 2rem;
}
.upload-box {
    border: 2px dashed #6b2c7a;
    border-radius: 8px;
    padding: 2rem;
    cursor: pointer;
    transition: background-color 0.2s;
}
.upload-box:hover {
    background-color: #f3e8ff;
}
.upload-box.dragover {
    background-color: #e8d9ff;
    border-color: #6a1b9a;
}
.upload-label span {
    color: #7e3ff2;
    font-weight: 500;
}
.file-name {
    margin-top: 1rem;
    font-style: italic;
    color: #555;
}
button, .submit-btn, .download-btn {
    background-color: var(--color-btn) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 4px;
    font-weight: 500;
    box-shadow: none !important;
}
button:hover, .submit-btn:hover, .download-btn:hover {
    background-color: var(--color-btn-hover) !important;
}
button:disabled, .submit-btn:disabled, .download-btn:disabled {
    background-color: #cccccc !important;
    color: #666666 !important;
    cursor: not-allowed;
}
.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #7e3ff2;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.preview-container {
    overflow-y: auto;
    border-top: 1px solid #e0e0e0;
    padding: 1rem;
}

.preview-container table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.preview-container th, .preview-container td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

.preview-container th {
    background-color: #f2f2f2;
    font-weight: 600;
}

.semester-header {
    background-color: #e2efff;
    font-weight: bold;
    text-align: center;
}

.semester-header td {
    background-color: #e2efff;
    font-weight: bold;
}

.semester-header td:last-child {
    background-color: #e2efff;
    font-weight: bold;
    text-align: center;
}

.error {
    color: #D8000C;
    background-color: #FFD2D2;
    border: 1px solid #D8000C;
    padding: 10px;
    border-radius: 5px;
}

details {
    margin: 2rem auto;
    width: 100%;
    max-width: 1600px;
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

details + details {
    margin-top: 1rem;
}

summary {
    padding: 1rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    outline: none;
    user-select: none;
    display: flex;
    align-items: center;
}

summary::-webkit-details-marker {
    display: none;
}

summary:before {
    content: '▶';
    margin-right: 0.5rem;
    display: inline-block;
    transition: transform 0.2s;
}

details[open] > summary:before {
    transform: rotate(90deg);
}

.summary-left {
    flex-grow: 1;
    min-width: 0; /* Prevents text from overflowing when the container is narrow */
    margin-right: 1rem; /* Adds space between the title and the button */
}

.summary-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

#download-btn {
    margin-top: 0;
}

.download-btn {
    margin-top: 0;
}

.submit-btn {
    margin-top: 2.5rem;
} 

.index-container {
    display: flex;
    justify-content: center;
    width: 100%;
}

.pdf-upload-form {
    width: 100%;
    max-width: 1600px;
}

.previews-main-container {
    margin-top: 1rem;
    width: 100%;
    max-width: 1600px;
}

.status-message {
    color: #1976d2;
    background-color: #e3f2fd;
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    border: 1px solid #bbdefb;
    text-align: center;
}

.error-message {
    color: #d32f2f;
    background-color: #ffebee;
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    border: 1px solid #ffcdd2;
}

.success-message {
    color: #2e7d32;
    background: #e8f5e8;
    border: 1px solid #a5d6a7;
    border-radius: 4px;
    padding: 0.5rem;
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.preview-details {
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 1rem;
    background-color: #fff;
}



.preview-summary {
    padding: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f9f9f9;
    border-radius: 8px 8px 0 0;
    height: 4.5rem;
}

.preview-summary:hover {
    background-color: #f0f0f0;
}

.preview-container {
    height: 600px;
    overflow-y: auto;
    border-top: 1px solid #e0e0e0;
    padding: 1rem;
}

.pdf-preview-container {
    height: 600px;
    border-top: 1px solid #e0e0e0;
}

.pdf-preview-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.submit-btn, .download-btn {
    background-color: #1976d2;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1.2rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    margin: auto 0;
}

.submit-btn:hover, .download-btn:hover {
    background-color: #1565c0;
}

/* Spacing for the process files button */
.upload-box + .submit-btn {
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .index-container {
        flex-direction: column;
    }
    
    div[style*="flex: 0 0 180px"] {
        flex: 1;
        margin-bottom: 1rem;
    }
} 

/* Login Page Styles */
.login-container {
    max-width: 450px;
    margin: 10rem auto;
    padding: 2rem;
    border: 1px solid #ddd;
    border-radius: 15px;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.login-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.login-error-message {
    margin-bottom: 1rem;
    text-align:center;
}

.login-form-group {
    margin-bottom: 1rem;
}

.login-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.login-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.login-form-group-password {
    margin-bottom: 1.5rem;
}

.login-submit-btn {
    width: 100%;
    padding: 0.75rem;
} 

.login-submit-btn:hover {
    background-color: #0056b3;
}

.back-to-home-container {
    margin-bottom: 2rem;
}
.back-to-home-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #6c757d;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
}
.back-to-home-btn:hover {
    background-color: #5a6268;
}

.testing-excel-upload-p {
    margin-top: 0;
    margin-bottom: 1rem;
    color: #666;
}

.testing-excel-upload-btn {
    margin-top: 1rem;
    width: 100%;
}

.testing-excel-status,
.testing-excel-error,
.testing-excel-success {
    margin-top: 1rem;
    padding: 0.75rem 1.25rem;
    border: 1px solid transparent;
    border-radius: .25rem;
}

.testing-excel-preview-th,
.testing-excel-preview-td {
    padding: 0.75rem;
    vertical-align: top;
    border-top: 1px solid #dee2e6;
}

.testing-excel-preview-table {
    width: 100%;
    margin-bottom: 1rem;
    color: #212529;
}

.header-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.admin-btn-style {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    font-size: 1rem;
    color: #212529;
    cursor: pointer;
}

.file-preview-wrapper {
    display: flex;
    gap: 1rem;
    width: 100%;
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
}
.file-preview-wrapper .preview-details {
    flex: 1;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    box-shadow: none;
}

.file-preview-wrapper .preview-details > summary {
    border-bottom: none;
}



#excel-previews-container > .preview-details {
    margin-top: 0;
    margin-bottom: 1rem;
} 

/* Invert for dark mode where needed */
.dropdown-content {
    background-color: #23272a;
    color: #e0e0e0;
}
.dropdown-content a {
    color: #8ab4f8 !important;
}
.dropdown-content a:hover {
    background-color: #222;
}
.badge.bg-light {
    background-color: var(--color-badge) !important;
    color: var(--color-text) !important;
}
.badge.bg-warning {
    background-color: var(--color-warning) !important;
    color: #23272a !important;
}
.badge.bg-danger {
    background-color: var(--color-danger) !important;
}
.badge.bg-primary {
    background-color: var(--color-btn) !important;
}
.table {
    background-color: var(--color-table-row) !important;
    color: var(--color-text) !important;
}
.table th, .table td {
    border-color: #333 !important;
}
.modal-content {
    background-color: #23272a !important;
    color: #e0e0e0 !important;
}
/* End dark mode */ 

.card, .stat-card, .pipeline-stage, .modal-content, .tab-content {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    border: none;
    margin-bottom: 2rem;
}
.card-header, .modal-header {
    background: #f5f6fa;
    font-weight: 700;
    border-radius: 16px 16px 0 0;
    border-bottom: 1px solid #e0e0e0;
}
.btn, .btn-outline-primary, .btn-outline-success, .btn-outline-warning {
    background: #7c3aed !important;
    color: #fff !important;
    border: none !important;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: background 0.2s;
}
.btn:hover, .btn-outline-primary:hover, .btn-outline-success:hover, .btn-outline-warning:hover {
    background: #5f2ab6 !important;
}
.table th {
    background: #fff;
    color: #333;
    font-weight: 700;
    border-bottom: 2px solid #e0e0e0;
}
.table td {
    background: #f7f8fa;
    color: #333;
    border-bottom: 1px solid #e0e0e0;
}
.bg-success, .badge.bg-success {
    background-color: #34c759 !important;
    color: #fff !important;
}
.bg-warning, .badge.bg-warning {
    background-color: #ffd60a !important;
    color: #23272a !important;
}
.bg-danger, .badge.bg-danger {
    background-color: #ff453a !important;
    color: #fff !important;
}
.bg-info, .badge.bg-info {
    background-color: #5bc0f8 !important;
    color: #23272a !important;
}
.card, .stat-card, .pipeline-stage, .modal-content, .tab-content {
    margin-bottom: 2rem;
}
.pipeline-stage {
    padding: 1.5rem;
}
.card-header, .modal-header {
    padding: 1.25rem 1.5rem;
}
/* Remove floating dark mode toggle styles if present */
#theme-toggle {
    display: none !important;
}