:root {
    /* Color Palette */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    --primary-50: #eff6ff;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;

    --success-500: #10b981;
    --success-50: #ecfdf5;

    --warning-500: #f59e0b;
    --warning-50: #fffbeb;

    --danger-500: #ef4444;
    --danger-50: #fef2f2;

    --surface: #ffffff;
    --background: var(--slate-50);
    --border: var(--slate-200);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 70px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--slate-800);
    line-height: 1.5;
    overflow: hidden;
    /* App takes full height */
}

/* Material Symbols Adjustments */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

/* Base Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary-600);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary:hover {
    background-color: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.23);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--slate-300);
    color: var(--slate-700);
}

.btn-outline:hover {
    background-color: var(--slate-100);
    border-color: var(--slate-400);
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--slate-500);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.icon-btn:hover:not(:disabled) {
    background-color: var(--slate-100);
    color: var(--slate-800);
}

.icon-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background-color: var(--danger-500);
    color: white;
    font-size: 0.625rem;
    font-weight: 700;
    min-width: 1.25rem;
    height: 1.25rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--surface);
}

.text-primary {
    color: var(--primary-600);
    font-weight: 500;
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    z-index: 10;
}

.sidebar-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-600);
}

.logo h2 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--slate-900);
}

.logo-icon {
    font-size: 1.75rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--slate-600);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: var(--slate-100);
    color: var(--slate-900);
}

.nav-item.active {
    background-color: var(--primary-50);
    color: var(--primary-600);
}

.nav-item.active .material-symbols-outlined {
    font-variation-settings: 'FILL' 1;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.user-profile:hover {
    background-color: var(--slate-100);
}

.avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    object-fit: cover;
}

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

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--slate-900);
}

.user-role {
    font-size: 0.75rem;
    color: var(--slate-500);
}

/* Sidebar Collapsed State */
.sidebar.collapsed {
    width: 80px;
}

.sidebar.collapsed .logo h2,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .user-info,
.sidebar.collapsed #logoutBtn {
    display: none;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 0;
}

.sidebar.collapsed .logo {
    gap: 0;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .nav-item.sub-item {
    padding-left: 0.75rem !important;
}

.sidebar.collapsed .user-profile {
    justify-content: center;
    padding: 0.5rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    background: radial-gradient(circle at top right, #f1f5f9, #f8fafc);
}

/* Background ambient decoration */
.main-content::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-50) 0%, transparent 70%);
    opacity: 0.6;
    z-index: 0;
    pointer-events: none;
}

.topbar {
    height: var(--topbar-height);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

.search-bar {
    display: flex;
    align-items: center;
    background-color: var(--slate-100);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    width: 300px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.search-bar:focus-within {
    background-color: var(--surface);
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-icon {
    color: var(--slate-400);
    font-size: 1.25rem;
}

.search-bar input {
    border: none;
    background: transparent;
    padding: 0 0.5rem;
    width: 100%;
    font-size: 0.875rem;
    color: var(--slate-800);
    outline: none;
}

.search-bar input::placeholder {
    color: var(--slate-400);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.content-body {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.page-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--slate-900);
    letter-spacing: -0.025em;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--slate-500);
    font-size: 0.95rem;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.metric-card {
    background-color: var(--surface);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-icon.open {
    background-color: var(--primary-50);
    color: var(--primary-600);
}

.metric-icon.overdue {
    background-color: var(--danger-50);
    color: var(--danger-500);
}

.metric-icon.resolved {
    background-color: var(--success-50);
    color: var(--success-500);
}

.metric-icon.average {
    background-color: var(--warning-50);
    color: var(--warning-500);
}

.metric-content {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--slate-500);
    font-weight: 500;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--slate-900);
}

/* Data Container / Glass Panel */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    border-radius: 1rem;
}

.data-container {
    display: flex;
    flex-direction: column;
}

.data-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.data-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--slate-900);
}

.data-filters {
    display: flex;
    gap: 1rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.filter-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.select-input {
    appearance: none;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem 2rem 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--slate-800);
    cursor: pointer;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpolyline%20points%3D%226%209%2012%2015%2018%209%22%3E%3C%2Fpolyline%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1em;
    min-width: 150px;
    font-family: var(--font-sans);
    outline: none;
    transition: all 0.2s ease;
}

.select-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Table */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
}

.data-table th {
    padding: 1rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--slate-500);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    background-color: rgba(248, 250, 252, 0.5);
}

.data-table td {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    color: var(--slate-700);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background-color: rgba(241, 245, 249, 0.4);
}

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

.rfi-id {
    font-weight: 600;
    color: var(--slate-900);
}

.rfi-subject {
    font-weight: 500;
    color: var(--slate-800);
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Status Tags */
.status-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.status-open {
    background-color: var(--primary-50);
    color: var(--primary-700);
    border: 1px solid var(--primary-100);
}

.status-pending {
    background-color: var(--warning-50);
    color: var(--warning-700);
    border: 1px solid var(--warning-100);
}

.status-closed {
    background-color: var(--success-50);
    color: var(--success-700);
    border: 1px solid var(--success-100);
}

.status-overdue {
    background-color: var(--danger-50);
    color: var(--danger-700);
    border: 1px solid var(--danger-100);
}

/* Pagination */
.pagination {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid rgba(226, 232, 240, 0.6);
}

.page-info {
    font-size: 0.875rem;
    color: var(--slate-500);
}

.page-controls {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.page-btn {
    width: 2rem;
    height: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    border: none;
    background: transparent;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-600);
    cursor: pointer;
    transition: all 0.2s ease;
}

.page-btn:hover:not(.active) {
    background-color: var(--slate-100);
}

.page-btn.active {
    background-color: var(--primary-500);
    color: white;
}

.ellipsis {
    color: var(--slate-400);
    padding: 0 0.5rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    background: rgba(255, 255, 255, 0.95);
    /* slightly more opaque for modal */
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-900);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid rgba(226, 232, 240, 0.6);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    background-color: rgba(248, 250, 252, 0.5);
    border-radius: 0 0 1rem 1rem;
}

/* Forms */
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.flex-1 {
    flex: 1;
}

.form-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-700);
}

.input-field {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    color: var(--slate-800);
    background-color: var(--surface);
    transition: all 0.2s ease;
    outline: none;
}

.input-field:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.input-field {
    resize: vertical;
    min-height: 80px;
}

/* Specific styling for select inside modal to have consistency */
select.input-field {
    appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpolyline%20points%3D%226%209%2012%2015%2018%209%22%3E%3C%2Fpolyline%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1em;
    padding-right: 2.5rem;
}

.file-drop-zone {
    border: 2px dashed var(--border);
    border-radius: 0.5rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--slate-50);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.file-drop-zone:hover {
    border-color: var(--primary-400);
    background-color: var(--primary-50);
}

.file-drop-zone .material-symbols-outlined {
    font-size: 2rem;
    color: var(--slate-400);
}

.file-hint {
    font-size: 0.75rem;
    color: var(--slate-500);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.data-table tbody tr {
    animation: fadeIn 0.3s ease-out forwards;
}

/* Responsive */
@media (max-width: 1024px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -100%;
        height: 100vh;
        width: 280px;
        box-shadow: var(--shadow-xl);
    }

    .sidebar.open {
        left: 0;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .data-filters {
        flex-direction: column;
        width: 100%;
    }

    .select-input {
        width: 100%;
    }
}

/* Notification Dropdown */
.topbar-actions {
    position: relative;
}

#notificationDropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 300px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: none;
    overflow: hidden;
}

#notificationDropdown.active {
    display: block;
}

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

.notif-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.notif-list {
    max-height: 400px;
    overflow-y: auto;
}

.notif-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    gap: 0.75rem;
}

.notif-item:hover {
    background-color: var(--slate-50);
}

.notif-item:last-child {
    border-bottom: none;
}

.notif-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-50);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notif-icon .material-symbols-outlined {
    font-size: 1.25rem;
    color: var(--primary-600);
}

.notif-content {
    flex: 1;
}

.notif-title {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.notif-desc {
    font-size: 0.75rem;
    color: var(--slate-500);
}

.notif-time {
    font-size: 0.7rem;
    color: var(--slate-400);
    margin-top: 0.25rem;
}

.notif-empty {
    padding: 2rem;
    text-align: center;
    color: var(--slate-400);
    font-size: 0.875rem;
}