/* 
 * SFB Bursar Portal Main Stylesheet
 * 
 * This file contains all styles for the frontend portal, including the 
 * layout, file table, modal system, alert notifications, and login form.
 * It uses CSS Variables for easy theme customization and 'Inter' font.
 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* --- Theme Configuration (Colors, Shadows, Radii) --- */
:root {
    --sfb-primary: #87322e;
    --sfb-primary-hover: #702724;
    --sfb-primary-light: #f4e4c9;
    --sfb-success: #516028;
    --sfb-success-hover: #3f4a1e;
    --sfb-success-light: #f0f3e8;
    --sfb-danger: #b91c1c;
    --sfb-danger-hover: #991b1b;
    --sfb-danger-light: #fef2f2;
    --sfb-warning: #d97706;
    --sfb-warning-light: #fef3c7;
    --sfb-text: #2d2524;
    --sfb-text-muted: #786c6a;
    --sfb-bg: linear-gradient(135deg, #f4e4c9 0%, #fcffc4 100%);
    --sfb-card-bg: #ffffff;
    --sfb-border: #d8c1a2;
    --sfb-shadow-sm: 0 1px 2px 0 rgba(135, 50, 46, 0.05);
    --sfb-shadow-md: 0 4px 6px -1px rgba(135, 50, 46, 0.08), 0 2px 4px -1px rgba(135, 50, 46, 0.04);
    --sfb-shadow-lg: 0 10px 15px -3px rgba(135, 50, 46, 0.1), 0 4px 6px -2px rgba(135, 50, 46, 0.05);
    --sfb-radius-sm: 6px;
    --sfb-radius-md: 10px;
    --sfb-radius-lg: 16px;
}

/* --- Layout Container --- */
.sfb-bursar-dashboard-wrapper {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--sfb-text);
    background: var(--sfb-bg);
    padding: 30px;
    border-radius: var(--sfb-radius-lg);
    box-shadow: var(--sfb-shadow-md);
    margin: 20px 0;
    line-height: 1.5;
}

/* --- Portal Header & Profile Badge --- */
.sfb-dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--sfb-border);
    padding-bottom: 24px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.sfb-header-left .sfb-dashboard-title {
    font-size: 28px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 4px 0;
    letter-spacing: -0.025em;
}

.sfb-header-left .sfb-dashboard-subtitle {
    font-size: 14px;
    color: var(--sfb-text-muted);
    margin: 0;
}

.sfb-header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sfb-user-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--sfb-card-bg);
    padding: 6px 16px 6px 6px;
    border-radius: 50px;
    box-shadow: var(--sfb-shadow-sm);
    border: 1px solid var(--sfb-border);
}

.sfb-user-avatar {
    width: 38px;
    height: 38px;
    background-color: var(--sfb-primary);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
}

.sfb-user-info {
    display: flex;
    flex-direction: column;
}

.sfb-user-name {
    font-size: 13px;
    font-weight: 600;
    color: #111827;
}

.sfb-user-role {
    font-size: 11px;
    color: var(--sfb-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- Reusable Button Components --- */
.sfb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    border-radius: var(--sfb-radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    text-decoration: none !important;
}

.sfb-btn-primary {
    background-color: var(--sfb-primary);
    color: #ffffff !important;
}

.sfb-btn-primary:hover {
    background-color: var(--sfb-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(135, 50, 46, 0.2);
}

.sfb-btn-outline {
    background-color: transparent;
    color: var(--sfb-text) !important;
    border-color: var(--sfb-border);
}

.sfb-btn-outline:hover {
    background-color: var(--sfb-bg);
    border-color: var(--sfb-text-muted);
}

.sfb-btn-logout {
    padding: 8px 14px;
    font-size: 13px;
}

.sfb-btn-block {
    display: flex;
    width: 100%;
}

.sfb-btn-danger-outline {
    background-color: transparent;
    color: var(--sfb-danger) !important;
    border-color: var(--sfb-danger-light);
}

.sfb-btn-danger-outline:hover {
    background-color: var(--sfb-danger-light);
    border-color: var(--sfb-danger);
}

.sfb-btn-small {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: var(--sfb-radius-sm);
}

/* --- Dashboard Actions (Search, Filters) --- */
.sfb-dashboard-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    gap: 16px;
    flex-wrap: wrap;
}

.sfb-search-wrapper {
    position: relative;
    flex: 1;
    min-width: 280px;
    max-width: 450px;
}

.sfb-search-wrapper input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--sfb-border);
    border-radius: var(--sfb-radius-md);
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
    background: var(--sfb-card-bg);
}

.sfb-search-wrapper input:focus {
    border-color: var(--sfb-primary);
    box-shadow: 0 0 0 3px rgba(135, 50, 46, 0.15);
}

.sfb-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    fill: var(--sfb-text-muted);
    pointer-events: none;
}

/* --- Files Table Styling --- */
.sfb-files-card {
    background-color: var(--sfb-card-bg);
    border: 1px solid var(--sfb-border);
    border-radius: var(--sfb-radius-md);
    box-shadow: var(--sfb-shadow-sm);
    overflow: hidden;
}

.sfb-table-responsive {
    overflow-x: auto;
    width: 100%;
}

.sfb-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.sfb-table th {
    background-color: #f8fafc;
    padding: 14px 20px;
    font-weight: 600;
    color: #475569;
    border-bottom: 1px solid var(--sfb-border);
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
}

.sfb-table th:hover {
    background-color: #f1f5f9;
}

.sfb-table th.sfb-no-sort {
    cursor: default;
}

.sfb-table th.sfb-no-sort:hover {
    background-color: #f8fafc;
}

.sfb-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--sfb-border);
    vertical-align: top;
}

.sfb-table tbody tr {
    transition: background-color 0.15s ease;
}

.sfb-table tbody tr:hover {
    background-color: #f8fafc;
}

.sfb-table tr:last-child td {
    border-bottom: none;
}

/* --- Specific Table Cell Styles --- */
.sfb-col-title {
    font-weight: 600;
    color: #111827;
}

.sfb-col-desc {
    color: var(--sfb-text-muted);
    max-width: 300px;
    word-break: break-word;
    font-size: 13px;
}

.sfb-file-cell {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sfb-file-meta {
    font-size: 11px;
    color: var(--sfb-text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sfb-badge-type {
    display: inline-block;
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 4px;
    letter-spacing: 0.02em;
}

/* File Type Badge Colors */
.sfb-badge-pdf { background-color: #fee2e2; color: #ef4444; }
.sfb-badge-doc, .sfb-badge-docx { background-color: #dbeafe; color: #2563eb; }
.sfb-badge-xls, .sfb-badge-xlsx, .sfb-badge-csv { background-color: #d1fae5; color: #059669; }
.sfb-badge-img, .sfb-badge-png, .sfb-badge-jpg, .sfb-badge-jpeg { background-color: #fae8ff; color: #c084fc; }
.sfb-badge-default { background-color: #f3f4f6; color: #4b5563; }

.sfb-col-author {
    font-weight: 500;
    color: var(--sfb-text);
}

.sfb-col-date {
    white-space: nowrap;
    color: var(--sfb-text-muted);
    font-size: 13px;
}

.sfb-col-actions {
    white-space: nowrap;
    text-align: right;
}

.sfb-actions-group {
    display: inline-flex;
    gap: 8px;
}

.sfb-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--sfb-border);
    background: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--sfb-text);
}

.sfb-action-btn:hover {
    background-color: var(--sfb-bg);
}

.sfb-action-btn-download {
    color: var(--sfb-primary);
    border-color: var(--sfb-primary-light);
}

.sfb-action-btn-download:hover {
    background-color: var(--sfb-primary-light);
}

.sfb-action-btn-edit {
    color: var(--sfb-warning);
    border-color: var(--sfb-warning-light);
}

.sfb-action-btn-edit:hover {
    background-color: var(--sfb-warning-light);
}

.sfb-action-btn-delete {
    color: var(--sfb-danger);
    border-color: var(--sfb-danger-light);
}

.sfb-action-btn-delete:hover {
    background-color: var(--sfb-danger-light);
}

.sfb-action-btn svg {
    width: 15px;
    height: 15px;
    fill: currentColor;
}

/* --- Table Footer & Pagination --- */
.sfb-table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-top: 1px solid var(--sfb-border);
    background-color: #f8fafc;
    flex-wrap: wrap;
    gap: 12px;
}

.sfb-footer-status {
    font-size: 13px;
    color: var(--sfb-text-muted);
}

.sfb-pagination {
    display: flex;
    gap: 4px;
}

.sfb-page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 6px;
    font-size: 13px;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid var(--sfb-border);
    background-color: #ffffff;
    color: var(--sfb-text);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.sfb-page-link:hover {
    background-color: var(--sfb-bg);
    border-color: var(--sfb-text-muted);
}

.sfb-page-link.sfb-active {
    background-color: var(--sfb-primary);
    color: #ffffff;
    border-color: var(--sfb-primary);
}

.sfb-page-link.sfb-disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Alert Notification System --- */
.sfb-alert {
    padding: 12px 16px;
    border-radius: var(--sfb-radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid transparent;
    animation: sfbSlideDown 0.3s ease-out;
}

@keyframes sfbSlideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sfb-alert-success {
    background-color: var(--sfb-success-light);
    color: var(--sfb-success-hover);
    border-color: #a7f3d0;
}

.sfb-alert-danger {
    background-color: var(--sfb-danger-light);
    color: var(--sfb-danger-hover);
    border-color: #fca5a5;
}

.sfb-alert-warning {
    background-color: var(--sfb-warning-light);
    color: #d97706;
    border-color: #fde68a;
}

.sfb-alert-close {
    background: transparent;
    border: none;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    color: inherit;
    line-height: 1;
}

/* --- Modal Dialog System --- */
.sfb-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sfb-modal.sfb-open {
    display: flex;
    opacity: 1;
}

.sfb-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
}

.sfb-modal-container {
    position: relative;
    background-color: var(--sfb-card-bg);
    border-radius: var(--sfb-radius-lg);
    width: 100%;
    max-width: 550px;
    box-shadow: var(--sfb-shadow-lg);
    border: 1px solid var(--sfb-border);
    animation: sfbModalSlide 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 10;
}

@keyframes sfbModalSlide {
    from {
        transform: translateY(20px) scale(0.96);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.sfb-modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--sfb-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sfb-modal-header h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
    color: #111827;
}

.sfb-modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--sfb-text-muted);
    cursor: pointer;
    transition: color 0.15s;
}

.sfb-modal-close:hover {
    color: var(--sfb-text);
}

.sfb-modal-body {
    padding: 24px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.sfb-modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--sfb-border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background-color: #f8fafc;
    border-bottom-left-radius: var(--sfb-radius-lg);
    border-bottom-right-radius: var(--sfb-radius-lg);
}

/* --- Form Elements Styling --- */
.sfb-form-group {
    margin-bottom: 20px;
}

.sfb-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #374151;
}

.sfb-required {
    color: var(--sfb-danger);
}

.sfb-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--sfb-border);
    border-radius: var(--sfb-radius-md);
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
    box-shadow: var(--sfb-shadow-sm);
    font-family: inherit;
}

.sfb-input:focus {
    border-color: var(--sfb-primary);
    box-shadow: 0 0 0 3px rgba(135, 50, 46, 0.15);
}

.sfb-textarea {
    min-height: 100px;
    resize: vertical;
}

/* --- Drag and Drop Zone Styling --- */
.sfb-dropzone {
    border: 2px dashed #cbd5e1;
    border-radius: var(--sfb-radius-md);
    padding: 30px 20px;
    text-align: center;
    background-color: #f8fafc;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.sfb-dropzone:hover, .sfb-dropzone.sfb-dragover {
    border-color: var(--sfb-primary);
    background-color: var(--sfb-primary-light);
}

.sfb-dropzone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.sfb-dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.sfb-dropzone-icon {
    width: 42px;
    height: 42px;
    color: var(--sfb-text-muted);
    margin-bottom: 12px;
    transition: transform 0.2s ease;
}

.sfb-dropzone:hover .sfb-dropzone-icon, 
.sfb-dropzone.sfb-dragover .sfb-dropzone-icon {
    color: var(--sfb-primary);
    transform: translateY(-2px);
}

.sfb-dropzone-text {
    font-size: 14px;
    font-weight: 500;
    margin: 0 0 4px 0;
}

.sfb-dropzone-text .sfb-link {
    color: var(--sfb-primary);
    text-decoration: underline;
}

.sfb-dropzone-sub {
    font-size: 11px;
    color: var(--sfb-text-muted);
    margin: 0;
}

/* --- Selected File Preview --- */
.sfb-selected-file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    padding: 10px 14px;
    background-color: var(--sfb-primary-light);
    border-radius: var(--sfb-radius-sm);
    border: 1px solid #c7d2fe;
}

.sfb-selected-filename {
    font-size: 13px;
    font-weight: 500;
    color: var(--sfb-primary-hover);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: calc(100% - 30px);
}

.sfb-remove-selected-file {
    background: transparent;
    border: none;
    font-size: 18px;
    color: var(--sfb-primary-hover);
    cursor: pointer;
    line-height: 1;
    font-weight: 700;
}

/* --- Upload Progress Bar --- */
.sfb-progress-container {
    margin-top: 16px;
}

.sfb-progress-bar-wrapper {
    background-color: var(--sfb-border);
    height: 6px;
    border-radius: 3px;
    overflow: hidden;
}

.sfb-progress-bar {
    background-color: var(--sfb-success);
    height: 100%;
    width: 0%;
    transition: width 0.1s linear;
}

.sfb-progress-text {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--sfb-text-muted);
    text-align: right;
}

/* --- Empty Table State --- */
.sfb-empty-state {
    text-align: center;
    padding: 40px 20px;
}

.sfb-empty-icon {
    width: 48px;
    height: 48px;
    color: var(--sfb-text-muted);
    margin-bottom: 16px;
}

.sfb-empty-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 6px 0;
    color: #374151;
}

.sfb-empty-desc {
    font-size: 13px;
    color: var(--sfb-text-muted);
    margin: 0;
    max-width: 300px;
    margin: 0 auto;
}

/* --- Login Form Styling --- */
.sfb-login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 0;
}

.sfb-login-card {
    background-color: var(--sfb-card-bg);
    border: 1px solid var(--sfb-border);
    border-radius: var(--sfb-radius-lg);
    box-shadow: var(--sfb-shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: 30px;
}

.sfb-login-header {
    text-align: center;
    margin-bottom: 24px;
}

.sfb-login-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 8px 0;
}

.sfb-login-header p {
    font-size: 14px;
    color: var(--sfb-text-muted);
    margin: 0;
}

.sfb-login-form .sfb-form-group {
    margin-bottom: 16px;
}

/* --- Global Loading Animations --- */
.sfb-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.sfb-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--sfb-primary-light);
    border-top: 3px solid var(--sfb-primary);
    border-radius: 50%;
    animation: sfbSpin 0.8s linear infinite;
}

@keyframes sfbSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.sfb-btn.sfb-loading {
    color: transparent !important;
    position: relative;
    pointer-events: none;
}

.sfb-btn.sfb-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-left: 2px solid currentColor;
    border-radius: 50%;
    animation: sfbSpin 0.6s linear infinite;
}

/* --- Responsive Design Media Queries --- */
@media (max-width: 640px) {
    .sfb-bursar-dashboard-wrapper {
        padding: 16px;
    }

    .sfb-dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .sfb-header-right {
        width: 100%;
        justify-content: space-between;
    }

    .sfb-dashboard-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .sfb-search-wrapper {
        max-width: 100%;
    }

    .sfb-table th, .sfb-table td {
        padding: 12px 14px;
    }

    .sfb-table-footer {
        flex-direction: column;
        align-items: center;
    }
}