/* UdyogSetu - Zero-Knowledge Edition
 * Global Styles & CSS Variables
 */

:root {
    /* Colors */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b7280;

    --color-primary: #00d4ff;
    --color-secondary: #7c3aed;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    --border-color: #2d2d4a;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-md);
}

small {
    font-size: 0.875rem;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }

/* Auth Page */
.auth-page {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.auth-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 900px;
    width: 100%;
}

@media (min-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr 1fr;
    }
}

.auth-box {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.logo-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.auth-box h1 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.auth-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--bg-primary);
    font-weight: 600;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.label-icon {
    margin-right: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

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

.toggle-password {
    position: absolute;
    right: var(--spacing-sm);
    top: 2.25rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.toggle-password:hover {
    opacity: 1;
}

/* Security Notice */
.security-notice {
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--color-warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
}

.notice-icon {
    font-size: 1.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: #00b8e6;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-success {
    background: var(--color-success);
    color: white;
}

.btn-warning {
    background: var(--color-warning);
    color: var(--bg-primary);
}

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    font-size: 1.25rem;
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-danger);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-success);
    color: #6ee7b7;
}

/* Dashboard */
.dashboard-page {
    background: var(--bg-primary);
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
}

.brand-icon {
    font-size: 1.5rem;
}

.vault-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-success);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.nav-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-btn:hover {
    background: var(--bg-tertiary);
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.stat-icon {
    font-size: 2rem;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-income .stat-value { color: var(--color-success); }
.stat-expenses .stat-value { color: var(--color-danger); }
.stat-net .stat-value { color: var(--color-primary); }

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.action-btn {
    flex: 1;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.action-btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.action-icon {
    font-size: 2rem;
}

.action-invoice { border-left: 4px solid var(--color-primary); }
.action-expense { border-left: 4px solid var(--color-warning); }
.action-contract { border-left: 4px solid var(--color-secondary); }
.action-report { border-left: 4px solid var(--color-info); }

/* Content Tabs */
.content-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
}

.content-tabs .tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.content-tabs .tab-btn:hover {
    color: var(--text-primary);
}

.content-tabs .tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Data Lists */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.list-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.search-input {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.data-list {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.loading {
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--text-secondary);
}

/* List Items */
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

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

.list-item:hover {
    background: var(--bg-tertiary);
}

.item-info {
    flex: 1;
}

.item-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.item-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    gap: var(--spacing-md);
}

.item-amount {
    font-weight: 700;
    font-size: 1.125rem;
}

.item-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.item-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.item-btn:hover {
    background: var(--bg-primary);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-large {
    max-width: 800px;
}

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

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-secondary);
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.modal-form {
    padding: var(--spacing-lg);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Premium Banner */
.premium-banner {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    max-width: 90%;
}

.premium-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.premium-icon {
    font-size: 2rem;
}

.premium-text {
    display: flex;
    flex-direction: column;
}

.premium-text strong {
    font-size: 1rem;
}

.premium-text span {
    font-size: 0.875rem;
    opacity: 0.9;
}

.premium-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: white;
    opacity: 0.7;
    padding: 0;
    line-height: 1;
}

.premium-close:hover {
    opacity: 1;
}

/* Toast */
.toast {
    display: none;
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    min-width: 300px;
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

/* View Page */
.view-page {
    background: var(--bg-primary);
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.view-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

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

.link-expiry {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-warning);
    font-size: 0.875rem;
}

.invoice-view {
    padding: var(--spacing-2xl);
}

.invoice-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
}

.invoice-number {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.invoice-status {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.status-paid {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.status-pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
}

.status-overdue {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.invoice-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.detail-section h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.invoice-items {
    margin-bottom: var(--spacing-xl);
}

.invoice-terms {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.invoice-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
}

.total-label {
    font-size: 1.125rem;
    font-weight: 600;
}

.total-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-success);
}

.invoice-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.payment-info {
    padding: var(--spacing-lg);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-success);
    border-radius: var(--radius-md);
}

.error-view {
    text-align: center;
    padding: var(--spacing-2xl);
}

.error-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

/* Settings Page */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.settings-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-danger {
    border-color: var(--color-danger);
}

.card-danger .card-header {
    background: rgba(239, 68, 68, 0.1);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row label {
    color: var(--text-secondary);
}

.badge {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-premium {
    background: rgba(124, 58, 237, 0.2);
    color: #a855f7;
}

.badge-free {
    background: rgba(107, 114, 128, 0.2);
    color: var(--text-secondary);
}

.settings-form {
    margin-top: var(--spacing-md);
}

.security-list {
    list-style: none;
}

.security-list li {
    padding: var(--spacing-sm) 0;
    display: flex;
    gap: var(--spacing-sm);
}

.mt-2 { margin-top: var(--spacing-md); }

/* Features Preview */
.features-preview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--border-color);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Auth Footer */
.auth-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* Share Options */
.share-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.share-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-option:hover {
    border-color: var(--color-primary);
    background: var(--bg-secondary);
}

.share-icon {
    font-size: 2rem;
}

.secure-link-area {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.link-container {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* Payment Info */
.payment-info {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.premium-features ul {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.premium-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.qr-placeholder {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.qr-code {
    width: 200px;
    height: 200px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: black;
    border-radius: var(--radius-md);
    font-weight: 600;
}

/* Report Modal */
.report-summary {
    margin-bottom: var(--spacing-xl);
}

.report-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.report-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.report-card label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.report-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.report-value.income { color: var(--color-success); }
.report-value.expense { color: var(--color-danger); }

.report-chart {
    margin-bottom: var(--spacing-lg);
}

/* Responsive */
@media (max-width: 640px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .top-nav {
        padding: var(--spacing-sm) var(--spacing-md);
    }

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

    .quick-actions {
        flex-direction: column;
    }

    .action-btn {
        width: 100%;
    }

    .list-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .list-actions {
        width: 100%;
    }

    .search-input {
        flex: 1;
    }

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

    .invoice-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .invoice-details {
        grid-template-columns: 1fr;
    }

    .invoice-actions {
        flex-direction: column;
    }

    .premium-banner {
        flex-direction: column;
        text-align: center;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.list-item {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}