:root {
    /* Premium Color Palette */
    --bg-body: #f8f9fa;
    --bg-surface: #ffffff;
    --bg-sidebar: #f1f3f5;

    --text-primary: #1a1d20;
    --text-secondary: #6c757d;
    --text-tertiary: #adb5bd;

    --primary: #228be6;
    --primary-hover: #1c7ed6;
    --primary-light: #e7f5ff;

    --danger: #fa5252;
    --danger-hover: #e03131;

    --border: #dee2e6;
    --border-focus: #228be6;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.5;
}

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

.app-header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    flex-shrink: 0;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.header-content img {
    max-height: 60px;
    width: auto;
    object-fit: contain;
}

.app-header h1 {
    font-size: 1.25em;
    font-weight: 600;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
}

/* Sidebar */
.sidebar {
    width: 320px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

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

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.product-item {
    padding: 1rem;
    background: var(--bg-surface);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

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

.product-item.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.product-item h4 {
    font-size: 1em;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.product-item p {
    font-size: 1em;
    color: var(--text-secondary);
}

/* Editor Panel */
.editor-panel {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    background: var(--bg-surface);
}

.empty-state {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary);
    text-align: center;
}

.empty-icon {
    margin-bottom: 1.5rem;
    color: var(--text-tertiary);
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: 1.5rem;
}

/* Form */
.product-form {
    max-width: 800px;
    margin: 0 auto;
}

.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

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

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 1em;
    font-weight: 500;
    color: var(--text-secondary);
}

.label-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.field-delete-btn {
    opacity: 0;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px;
    border-radius: 4px;
    transition: all 0.2s;
}

.form-group:hover .field-delete-btn {
    opacity: 1;
}

.field-delete-btn:hover {
    color: var(--danger);
    background-color: #fff5f5;
}

.form-group input,
.form-group select {
    max-width: 100% !important;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95em;
    transition: border-color 0.2s ease;
    background: var(--bg-body);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-body);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.checkbox-wrapper label {
    margin: 0;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

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

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

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

.btn-secondary:hover {
    background: var(--bg-body);
    border-color: var(--text-tertiary);
}

.btn-danger {
    background: #fff5f5;
    color: var(--danger);
}

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

.btn-text {
    background: transparent;
    color: var(--primary);
    padding: 0.5rem;
}

.btn-text:hover {
    background: var(--primary-light);
}

.btn-icon {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    border: none;
    cursor: pointer;
}

.btn-icon:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-md);
}

.modal-content h3 {
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.hidden {
    display: none !important;
}

/* Utilities */
/* Save Status */
.save-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-right: 1rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #40c057;
    /* Green */
}

.save-status.unsaved .status-dot {
    background-color: #fab005;
    /* Yellow */
}

.save-status.unsaved .status-text::after {
    content: '...';
}

input[type=checkbox]:checked:before{
  margin-left: -6px !important;
  line-height: 0px !important;
}