:root {
    --primary-color: #2c3e50;
    --primary-dark: #1a252f;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f5f6fa;
    --card-bg: #fff;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    color: #fff;
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: all 0.3s;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.1);
    color: #fff;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle .hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #fff;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle.active .hamburger:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid rgba(255,255,255,0.2);
}

.nav-user-name {
    font-weight: 600;
}

.nav-warning {
    color: var(--warning-color) !important;
    animation: pulse 2s infinite;
}

.nav-logout {
    background-color: rgba(231,76,60,0.2);
}

.nav-logout:hover {
    background-color: var(--danger-color) !important;
}

.btn-nav {
    background-color: var(--accent-color);
    color: #fff !important;
}

.btn-nav:hover {
    background-color: #2980b9 !important;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: #fff;
}

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

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

.btn-success:hover {
    background-color: #219a52;
}

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

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-sm {
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border-color: var(--danger-color);
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: var(--warning-color);
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: var(--accent-color);
    color: #0c5460;
}

/* Auth Forms */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 420px;
}

.auth-card-large {
    max-width: 600px;
}

.auth-card h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-links {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-links a {
    color: var(--accent-color);
    text-decoration: none;
}

.auth-links a:hover {
    text-decoration: underline;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

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

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input {
    width: auto;
}

.checkbox-group label {
    margin-bottom: 0;
}

.form-help {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.8rem;
    color: var(--text-light);
}

.form-help-text {
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 0.5rem;
    background-color: #f8f9fa;
    border-radius: var(--radius);
}

.form-section {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.form-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.form-notice {
    background-color: #fff3cd;
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.styled-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* Dashboard */
.dashboard {
    padding: 1rem 0;
}

.dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-header h1 {
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

.dashboard-header p {
    color: var(--text-light);
}

.beta-banner {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: #fff;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(247, 147, 30, 0.3);
    font-size: 0.95rem;
    line-height: 1.5;
}

.beta-banner a {
    color: #fff;
    font-weight: 600;
    text-decoration: underline;
}

.beta-banner a:hover {
    color: var(--primary-dark);
}

.beta-banner strong {
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
}

.stat-label {
    color: var(--text-light);
    margin-top: 0.3rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.dashboard-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.dashboard-card.full-width {
    grid-column: 1 / -1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: #f8f9fa;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.1rem;
    color: var(--primary-color);
}

.card-content {
    padding: 1.5rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table th,
.data-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 500;
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
}

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

/* Mini tables */
.mini-table-container {
    overflow-x: auto;
}

.mini-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.mini-table th,
.mini-table td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.mini-table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-pending {
    background-color: #fff3cd;
    color: #856404;
}

.status-approved {
    background-color: #d4edda;
    color: #155724;
}

.status-rejected {
    background-color: #f8d7da;
    color: #721c24;
}

.status-completed {
    background-color: #d1ecf1;
    color: #0c5460;
}

.status-paid {
    background-color: #d4edda;
    color: #155724;
}

.status-unpaid {
    background-color: #f8d7da;
    color: #721c24;
}

.status-active {
    background-color: #d4edda;
    color: #155724;
}

.status-inactive {
    background-color: #f8d7da;
    color: #721c24;
}

/* Lists */
.appointments-list,
.invoices-list,
.services-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.appointment-item,
.invoice-item,
.service-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--radius);
    gap: 1rem;
}

.appointment-info,
.invoice-info,
.service-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    flex: 1;
}

.appointment-date,
.appointment-time,
.appointment-service,
.invoice-number,
.invoice-date,
.invoice-due,
.invoice-user,
.invoice-amount,
.service-price {
    font-size: 0.9rem;
}

.invoice-number,
.service-info h3 {
    font-weight: 600;
    color: var(--primary-color);
}

.appointment-actions,
.invoice-status,
.service-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.service-edit-form {
    margin-top: -0.5rem;
    padding: 0 1rem 1rem 1rem;
}

.edit-form {
    padding: 1.25rem;
    background-color: #f8f9fa;
}

.edit-form h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.inline-form {
    display: inline-flex;
    gap: 0.3rem;
    align-items: center;
}

.input-sm {
    padding: 0.3rem 0.5rem !important;
    font-size: 0.85rem !important;
    width: auto !important;
    min-width: 80px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.empty-state .btn {
    margin-top: 1rem;
}

/* No Data */
.no-data {
    text-align: center;
    color: var(--text-light);
    padding: 1rem;
}

/* Page Container */
.page-container {
    padding: 1rem 0;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    color: var(--primary-color);
}

.page-header p {
    color: var(--text-light);
}

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

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-color);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* Action Bar */
.action-bar {
    margin-bottom: 1.5rem;
}

/* User Details */
.user-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.detail-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.detail-card.full-width {
    grid-column: 1 / -1;
}

.detail-card h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.detail-table {
    width: 100%;
}

.detail-table td {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.detail-table td:first-child {
    font-weight: 500;
    width: 40%;
    color: var(--text-light);
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Invoice */
.invoice-container {
    max-width: 900px;
    margin: 0 auto;
}

.invoice-paper {
    background: #fff;
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--primary-color);
}

.invoice-company h2 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.invoice-company p {
    color: var(--text-light);
    margin: 0.2rem 0;
}

.invoice-meta {
    text-align: right;
}

.invoice-meta h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.invoice-meta-table {
    margin-left: auto;
}

.invoice-meta-table td {
    padding: 0.3rem 0;
}

.invoice-meta-table td:first-child {
    padding-right: 1rem;
    color: var(--text-light);
}

.invoice-parties {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.invoice-parties h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.invoice-parties p {
    margin: 0.2rem 0;
}

.invoice-description {
    margin-bottom: 2rem;
}

.invoice-description h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

.invoice-table th,
.invoice-table td {
    padding: 0.7rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.invoice-table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.invoice-table tfoot td {
    border-top: 2px solid var(--primary-color);
}

.invoice-total td {
    background-color: #f8f9fa;
    font-size: 1.1rem;
}

.invoice-payment {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.invoice-payment h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.payment-table td {
    padding: 0.3rem 0;
}

.payment-table td:first-child {
    padding-right: 1rem;
    color: var(--text-light);
    width: 150px;
}

.invoice-footer {
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.invoice-footer p {
    margin: 0.3rem 0;
}

/* Payment Method Select */
.payment-method-select {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: var(--radius);
}

.payment-method-select h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.payment-method-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.payment-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.payment-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.2rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s;
}

.payment-option:hover {
    border-color: var(--accent-color);
}

.payment-option.selected {
    border-color: var(--accent-color);
    background-color: #e8f4fc;
}

.payment-option input[type="radio"] {
    width: auto;
}

.payment-label {
    font-weight: 500;
}

/* Notes Tooltip */
.notes-tooltip {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    background-color: #e9ecef;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: help;
}

/* Text Muted */
.text-muted {
    color: var(--text-light);
}

/* Error Page */
.error-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

.error-card {
    text-align: center;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.error-card h1 {
    font-size: 5rem;
    color: var(--primary-color);
}

.error-card p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin: 1rem 0 2rem;
}

/* Landing Page */
.landing-page {
    text-align: center;
}

.hero-section {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-radius: var(--radius);
    margin-bottom: 3rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.features-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-light);
}

.info-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.info-section h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-table {
    margin: 0 auto;
}

.info-table td {
    padding: 0.5rem 1.5rem;
    text-align: left;
}

.info-table td:first-child {
    color: var(--text-light);
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: rgba(255,255,255,0.8);
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

.footer p {
    font-size: 0.9rem;
}

.footer-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.footer-link:hover {
    text-decoration: underline;
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        position: relative;
        padding: 0.5rem 12px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
        padding: 0.5rem 0;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
        border-radius: 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        width: 100%;
    }

    .nav-link:hover {
        background-color: rgba(255,255,255,0.12);
    }

    .nav-user {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        border-top: 1px solid rgba(255,255,255,0.2);
        padding-top: 0.5rem;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-user .nav-link {
        padding-left: 2.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
    
    .invoice-parties {
        grid-template-columns: 1fr;
    }
    
    .invoice-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .invoice-meta {
        text-align: left;
    }
    
    .invoice-meta-table {
        margin-left: 0;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .user-details-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 12px;
    }

    .main-content {
        padding: 1rem 0;
    }

    .data-table {
        font-size: 0.85rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.5rem 0.6rem;
    }

    .invoice-paper {
        padding: 1.5rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .styled-form {
        padding: 1.25rem;
    }

    .payment-options {
        flex-direction: column;
        align-items: stretch;
    }

    .payment-option {
        width: 100%;
    }

    .action-buttons,
    .form-actions {
        flex-wrap: wrap;
    }

    .dashboard-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .appointment-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .invoice-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .invoice-status {
        flex-direction: column;
        align-items: flex-start;
    }
}

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