/* --- Design System --- */
:root {
    --brand-50: #f0f9ff;
    --brand-100: #e0f2fe;
    --brand-500: #0ea5e9;
    --brand-600: #0284c7;
    --emerald-100: #d1fae5;
    --emerald-600: #059669;
    --amber-100: #fef3c7;
    --amber-600: #d97706;
    --red-50: #fef2f2;
    --red-600: #dc2626;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(226, 232, 240, 0.8);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Outfit', sans-serif;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
}

.dark-mode {
    --slate-50: #020617;
    --slate-100: #0f172a;
    --slate-200: #1e293b;
    --slate-300: #334155;
    --slate-400: #475569;
    --slate-500: #64748b;
    --slate-600: #94a3b8;
    --slate-700: #cbd5e1;
    --slate-800: #e2e8f0;
    --slate-900: #f1f5f9;
    --slate-950: #ffffff;
    --white: #0f172a;
    --glass: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* --- Color Utilities --- */
.bg-brand-500 { background-color: var(--brand-500); }
.bg-emerald-500 { background-color: var(--emerald-600); }
.bg-amber-500 { background-color: var(--amber-600); }
.bg-indigo-500 { background-color: #6366f1; }
.bg-red-500 { background-color: var(--red-600); }

.text-brand-600 { color: var(--brand-600); }
.text-emerald-600 { color: var(--emerald-600); }
.text-amber-600 { color: var(--amber-600); }
.text-indigo-600 { color: #4f46e5; }

.bg-brand-100 { background-color: var(--brand-100); }
.bg-emerald-100 { background-color: var(--emerald-100); }
.bg-amber-100 { background-color: var(--amber-100); }
.bg-indigo-100 { background-color: #e0e7ff; }

.dark-mode .bg-brand-100 { background-color: rgba(14, 165, 233, 0.1); }
.dark-mode .bg-emerald-100 { background-color: rgba(5, 150, 105, 0.1); }
.dark-mode .bg-amber-100 { background-color: rgba(217, 119, 6, 0.1); }
.dark-mode .bg-indigo-100 { background-color: rgba(99, 102, 241, 0.1); }

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

html, body {
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--slate-50);
    color: var(--slate-900);
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: currentColor;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    transition: all 0.2s;
}

input, select, textarea {
    font-family: inherit;
    transition: all 0.2s;
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

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

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 40;
    display: none;
}

.sidebar-overlay.open {
    display: block;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--sidebar-width);
    background: var(--white);
    border-right: 1px solid var(--slate-200);
    z-index: 50;
    display: flex;
    flex-direction: column;
    transition: width 0.3s, transform 0.3s;
}

.dark-mode .sidebar {
    border-right-color: var(--slate-200);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--brand-500);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 10px 15px -3px rgba(14, 165, 233, 0.3);
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
    white-space: nowrap;
}

.sidebar.collapsed .logo-text {
    display: none;
}

.mobile-close-btn {
    display: none;
    padding: 0.5rem;
    border-radius: 0.75rem;
    color: var(--slate-500);
}

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

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

.nav-item:hover {
    background: var(--slate-100);
    color: var(--brand-500);
}

.dark-mode .nav-item:hover {
    background: var(--slate-800);
}

.nav-item.active {
    background: var(--brand-500);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(14, 165, 233, 0.2);
}

.sidebar.collapsed .nav-item span {
    display: none;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--slate-200);
}

.dark-mode .sidebar-footer {
    border-top-color: var(--slate-200);
}

.theme-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    color: var(--slate-500);
}

.theme-toggle-btn:hover {
    background: var(--slate-100);
}

.dark-mode .theme-toggle-btn:hover {
    background: var(--slate-800);
}

.sun-icon { display: none; }
.dark-mode .sun-icon { display: block; }
.dark-mode .moon-icon { display: none; }

.sidebar.collapsed .theme-toggle-btn span {
    display: none;
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-width: 0;
    transition: margin-left 0.3s;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed + .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.header {
    position: sticky;
    top: 0;
    z-index: 30;
    padding: 0 1rem;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
}

@media (min-width: 640px) {
    .header {
        padding: 0 2rem;
    }
}

.dark-mode .header {
    background: rgba(15, 23, 42, 0.8);
    border-bottom-color: var(--slate-200);
}

.toggle-sidebar-btn {
    padding: 0.5rem;
    border-radius: 0.75rem;
    color: var(--slate-500);
}

.toggle-sidebar-btn:hover {
    background: var(--slate-100);
}

.dark-mode .toggle-sidebar-btn:hover {
    background: var(--slate-800);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.icon-btn {
    padding: 0.5rem;
    border-radius: 0.75rem;
    color: var(--slate-500);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--slate-100);
}

.dark-mode .icon-btn:hover {
    background: var(--slate-800);
}

.user-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    background: var(--brand-500);
    color: white;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.content-area {
    padding: 1rem;
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
    min-width: 0;
}

@media (min-width: 640px) {
    .content-area {
        padding: 2rem;
    }
}

/* --- Components --- */
.page-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .page-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.page-title h1 {
    font-family: var(--font-display);
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.page-title p {
    color: var(--slate-500);
    margin-top: 0.25rem;
}

.btn-primary {
    background: var(--brand-500);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(14, 165, 233, 0.2);
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--brand-600);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: scale(0.95);
}

/* --- Stats Grid --- */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat-card {
    background: var(--white);
    padding: 1.25rem;
    border-radius: 1.5rem;
    border: 1px solid var(--slate-200);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
}

@media (min-width: 640px) {
    .stat-card {
        padding: 1.5rem;
    }
}

.dark-mode .stat-card {
    border-color: var(--slate-200);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.stat-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

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

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

/* --- Dashboard Grid --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    min-width: 0;
}

@media (min-width: 1024px) {
    .dashboard-grid { 
        grid-template-columns: 2fr 1fr; 
        gap: 2rem;
    }
}

.card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1.5rem;
    padding: 1rem;
    min-width: 0;
    overflow: hidden;
}

@media (min-width: 640px) {
    .card {
        padding: 1.5rem;
    }
}

.dark-mode .card {
    border-color: var(--slate-200);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

/* --- Activity List --- */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.activity-item {
    display: flex;
    gap: 1rem;
}

.activity-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-info {
    flex: 1;
    min-width: 0;
}

.activity-info p {
    font-size: 0.875rem;
    font-weight: 500;
    word-break: break-word;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--slate-400);
    margin-top: 0.25rem;
}

/* --- Client Cards --- */
.clients-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .clients-grid { grid-template-columns: repeat(3, 1fr); }
}

.client-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1.5rem;
    padding: 1.5rem;
    position: relative;
    transition: all 0.3s;
}

.dark-mode .client-card {
    border-color: var(--slate-200);
}

.client-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.client-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.client-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 1rem;
    background: var(--slate-100);
    color: var(--brand-500);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode .client-avatar {
    background: var(--slate-800);
}

.client-actions {
    display: flex;
    gap: 0.5rem;
}

@media (min-width: 1024px) {
    .client-actions {
        opacity: 0;
        transition: opacity 0.2s;
    }
    .client-card:hover .client-actions {
        opacity: 1;
    }
}

.action-btn {
    padding: 0.5rem;
    border-radius: 0.75rem;
    background: var(--white);
    border: 1px solid var(--slate-200);
    color: var(--slate-400);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode .action-btn {
    background: var(--slate-800);
    border-color: var(--slate-700);
}

.action-btn:hover {
    color: var(--brand-500);
    border-color: var(--brand-500);
}

.action-btn.delete:hover {
    color: var(--red-600);
    border-color: var(--red-600);
}

.client-name {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
}

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

.client-details {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--slate-500);
    font-size: 0.875rem;
}

.client-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--slate-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dark-mode .client-footer {
    border-top-color: var(--slate-200);
}

.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}

.badge-active { background: #dcfce7; color: #166534; }
.badge-inactive { background: #f1f5f9; color: #64748b; }

.dark-mode .badge-active { background: rgba(5, 150, 105, 0.2); color: #10b981; }
.dark-mode .badge-inactive { background: rgba(100, 116, 139, 0.2); color: #94a3b8; }

.view-details-btn {
    color: var(--brand-500);
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* --- Tables --- */
.table-container {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.dark-mode .table-container {
    border-color: var(--slate-200);
}

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

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

th {
    background: var(--slate-50);
    padding: 1rem 1.5rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    text-align: left;
    border-bottom: 1px solid var(--slate-200);
}

.dark-mode th {
    background: rgba(30, 41, 59, 0.5);
    border-bottom-color: var(--slate-200);
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--slate-100);
}

.dark-mode td {
    border-bottom-color: var(--slate-200);
}

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

tr:hover td {
    background: var(--slate-50);
}

.dark-mode tr:hover td {
    background: rgba(30, 41, 59, 0.3);
}

/* --- Mobile Cards --- */
.mobile-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 1024px) {
    .mobile-cards { display: none; }
    .desktop-table { display: block; }
}

@media (max-width: 1023px) {
    .mobile-cards { display: flex; }
    .desktop-table { display: none; }
}

.mobile-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1.5rem;
    padding: 1.5rem;
}

.dark-mode .mobile-card {
    border-color: var(--slate-200);
}

/* --- Pipeline --- */
.pipeline-container {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    padding-bottom: 1rem;
    min-height: calc(100vh - 250px);
}

.pipeline-column {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--slate-100);
    padding: 1rem;
    border-radius: 1.5rem;
    transition: background-color 0.2s;
}

.dark-mode .pipeline-column {
    background: rgba(15, 23, 42, 0.5);
}

.pipeline-column.drag-over {
    background: var(--brand-50);
    border: 2px dashed var(--brand-500);
}

.dark-mode .pipeline-column.drag-over {
    background: rgba(14, 165, 233, 0.1);
}

.column-header {
    padding: 0 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.column-title {
    font-family: var(--font-display);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--slate-900);
}

.count-badge {
    background: var(--slate-200);
    color: var(--slate-600);
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
}

.dark-mode .count-badge {
    background: var(--slate-200);
    color: var(--slate-600);
}

.column-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 100px;
}

.pipeline-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1rem;
    padding: 1.25rem;
    cursor: grab;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.pipeline-card:active {
    cursor: grabbing;
}

.pipeline-card.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.dark-mode .pipeline-card {
    border-color: var(--slate-200);
}

.pipeline-card:hover {
    border-color: var(--brand-500);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.count-badge {
    background: var(--slate-200);
    color: var(--slate-500);
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
}

.dark-mode .count-badge {
    background: var(--slate-200);
}

.column-content {
    background: rgba(241, 245, 249, 0.5);
    border-radius: 1.5rem;
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.dark-mode .column-content {
    background: rgba(15, 23, 42, 0.5);
}

.pipeline-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1.25rem;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
}

.dark-mode .pipeline-card {
    border-color: var(--slate-200);
}

.pipeline-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* --- Modals --- */
.modal-container {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-container.open {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.4);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 32rem;
    background: var(--white);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    z-index: 10;
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--slate-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dark-mode .modal-header {
    border-bottom-color: var(--slate-800);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-body {
    padding: 1.5rem;
    max-height: 80vh;
    overflow-y: auto;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    background: var(--slate-100);
    border: 2px solid transparent;
    outline: none;
    color: var(--slate-900);
}

.dark-mode .form-control {
    background: var(--slate-100);
    color: var(--slate-900);
    border-color: var(--slate-200);
}

.form-control:focus {
    border-color: var(--brand-500);
    background: var(--white);
    color: var(--slate-900);
}

.dark-mode .form-control:focus {
    background: var(--slate-200);
    color: var(--slate-950);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 1rem center !important;
    background-size: 1.25rem !important;
    padding-right: 2.5rem !important;
}

.dark-mode select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E") !important;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    border-radius: 4px;
    padding: 2px;
}

.dark-mode input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1) brightness(1.5);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

/* --- Toasts --- */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--white);
    border-radius: 1rem;
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: toastIn 0.3s ease-out;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

.toast.success { border-left: 4px solid var(--emerald-600); }
.toast.error { border-left: 4px solid var(--red-600); }

/* --- Responsive Utilities --- */
@media (max-width: 1023px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0 !important;
    }
    .mobile-close-btn {
        display: block;
    }
    .sidebar-overlay.open {
        display: block;
    }
}

/* --- Custom Scrollbar --- */
.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--slate-200);
    border-radius: 10px;
}

.dark-mode .custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--slate-800);
}