/* =====================================================
   GEROITE DESIGN SYSTEM - BASE COMPONENTS
   =====================================================
   
   This file defines all reusable UI components.
   Components use design tokens from design-tokens.css.
   
   COMPONENT CATEGORIES:
   1. Layout Components (containers, grids)
   2. Card Components
   3. Button Components
   4. Form Components
   5. Badge & Status Components
   6. Table Components
   7. Alert & Notification Components
   8. Modal Components
   9. Navigation Components
   10. Loading States
   
   Version: 1.0.0
   ===================================================== */

/* ========================================
   1. LAYOUT COMPONENTS
   ======================================== */

/* Container */
.g-container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-5);
}

.g-container-sm { max-width: var(--container-sm); }
.g-container-md { max-width: var(--container-md); }
.g-container-lg { max-width: var(--container-lg); }
.g-container-xl { max-width: var(--container-xl); }

/* Grid System */
.g-grid {
    display: grid;
    gap: var(--space-4);
}

.g-grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.g-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.g-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.g-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.g-grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.g-grid-cols-6 { grid-template-columns: repeat(6, 1fr); }

/* Auto-fit grid for responsive cards */
.g-grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.g-grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Flex utilities */
.g-flex { display: flex; }
.g-flex-inline { display: inline-flex; }
.g-flex-col { flex-direction: column; }
.g-flex-row { flex-direction: row; }
.g-flex-wrap { flex-wrap: wrap; }
.g-flex-nowrap { flex-wrap: nowrap; }

.g-items-start { align-items: flex-start; }
.g-items-center { align-items: center; }
.g-items-end { align-items: flex-end; }
.g-items-stretch { align-items: stretch; }

.g-justify-start { justify-content: flex-start; }
.g-justify-center { justify-content: center; }
.g-justify-end { justify-content: flex-end; }
.g-justify-between { justify-content: space-between; }
.g-justify-around { justify-content: space-around; }

.g-gap-1 { gap: var(--space-1); }
.g-gap-2 { gap: var(--space-2); }
.g-gap-3 { gap: var(--space-3); }
.g-gap-4 { gap: var(--space-4); }
.g-gap-5 { gap: var(--space-5); }
.g-gap-6 { gap: var(--space-6); }
.g-gap-8 { gap: var(--space-8); }

/* ========================================
   2. CARD COMPONENTS
   ======================================== */

/* Base Card */
.g-card {
    background: var(--surface-default);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    border: var(--card-border);
}

/* Card Variants */
.g-card-compact { padding: var(--card-padding-sm); }
.g-card-spacious { padding: var(--card-padding-lg); }

/* Card with accent border */
.g-card-accent { border-left: 4px solid var(--color-brand-primary); }
.g-card-accent-success { border-left: 4px solid var(--color-success); }
.g-card-accent-warning { border-left: 4px solid var(--color-warning); }
.g-card-accent-danger { border-left: 4px solid var(--color-danger); }
.g-card-accent-info { border-left: 4px solid var(--color-info); }

/* Card with hover effect */
.g-card-interactive {
    cursor: pointer;
    transition: var(--transition-normal);
}

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

/* Card Header */
.g-card-header {
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-default);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.g-card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
}

.g-card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-1);
}

/* Card Body */
.g-card-body {
    flex: 1;
}

/* Card Footer */
.g-card-footer {
    padding-top: var(--space-4);
    margin-top: var(--space-4);
    border-top: 1px solid var(--border-default);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* Stat Card (Dashboard KPIs) */
.g-stat-card {
    background: var(--surface-default);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    border: var(--card-border);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.g-stat-card.primary { border-left: 4px solid var(--color-brand-primary); }
.g-stat-card.success { border-left: 4px solid var(--color-success); }
.g-stat-card.warning { border-left: 4px solid var(--color-warning); }
.g-stat-card.danger { border-left: 4px solid var(--color-danger); }
.g-stat-card.info { border-left: 4px solid var(--color-info); }

.g-stat-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-3);
}

.g-stat-value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

.g-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-2);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

/* ========================================
   3. BUTTON COMPONENTS
   ======================================== */

/* Base Button */
.g-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-size: var(--btn-font-size);
    font-weight: var(--btn-font-weight);
    font-family: inherit;
    line-height: var(--line-height-normal);
    text-decoration: none;
    border: none;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: var(--transition-colors), var(--transition-transform);
    white-space: nowrap;
}

.g-btn:disabled,
.g-btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Button Sizes */
.g-btn-sm {
    padding: var(--btn-padding-y-sm) var(--btn-padding-x-sm);
    font-size: var(--font-size-xs);
}

.g-btn-lg {
    padding: var(--btn-padding-y-lg) var(--btn-padding-x-lg);
    font-size: var(--font-size-base);
}

.g-btn-full {
    width: 100%;
}

/* Button Variants - Solid */
.g-btn-primary {
    background: var(--color-brand-primary);
    color: white;
}

.g-btn-primary:hover:not(:disabled) {
    background: var(--color-brand-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

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

.g-btn-secondary:hover:not(:disabled) {
    background: var(--btn-secondary-hover);
}

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

.g-btn-success:hover:not(:disabled) {
    background: var(--color-success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-success);
}

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

.g-btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-danger);
}

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

.g-btn-warning:hover:not(:disabled) {
    background: var(--color-warning-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-warning);
}

/* Button Variants - Outline */
.g-btn-outline-primary {
    background: transparent;
    color: var(--color-brand-primary);
    border: 2px solid var(--color-brand-primary);
}

.g-btn-outline-primary:hover:not(:disabled) {
    background: var(--color-brand-primary);
    color: white;
    transform: translateY(-2px);
}

.g-btn-outline-success {
    background: transparent;
    color: var(--color-success);
    border: 2px solid var(--color-success);
}

.g-btn-outline-success:hover:not(:disabled) {
    background: var(--color-success);
    color: white;
    transform: translateY(-2px);
}

.g-btn-outline-danger {
    background: transparent;
    color: var(--color-danger);
    border: 2px solid var(--color-danger);
}

.g-btn-outline-danger:hover:not(:disabled) {
    background: var(--color-danger);
    color: white;
    transform: translateY(-2px);
}

/* Button Variants - Ghost/Link */
.g-btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.g-btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.g-btn-link {
    background: transparent;
    color: var(--text-link);
    padding: 0;
}

.g-btn-link:hover:not(:disabled) {
    text-decoration: underline;
    color: var(--text-link-hover);
}

/* Icon Button */
.g-btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

.g-btn-icon-sm {
    width: 28px;
    height: 28px;
}

.g-btn-icon-lg {
    width: 44px;
    height: 44px;
}

/* Button Group */
.g-btn-group {
    display: inline-flex;
}

.g-btn-group .g-btn {
    border-radius: 0;
}

.g-btn-group .g-btn:first-child {
    border-radius: var(--btn-radius) 0 0 var(--btn-radius);
}

.g-btn-group .g-btn:last-child {
    border-radius: 0 var(--btn-radius) var(--btn-radius) 0;
}

/* ========================================
   4. FORM COMPONENTS
   ======================================== */

/* Form Group */
.g-form-group {
    margin-bottom: var(--space-5);
}

/* Form Label */
.g-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.g-label-required::after {
    content: " *";
    color: var(--color-danger);
}

/* Input Base */
.g-input {
    width: 100%;
    padding: var(--input-padding-y) var(--input-padding-x);
    font-size: var(--input-font-size);
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--surface-default);
    border: var(--input-border);
    border-radius: var(--input-radius);
    transition: var(--transition-colors);
}

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

.g-input:hover {
    border-color: var(--color-brand-primary);
}

.g-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: var(--focus-ring);
}

.g-input:disabled {
    background-color: var(--bg-tertiary);
    color: var(--text-disabled);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Input States */
.g-input-error {
    border-color: var(--color-danger);
}

.g-input-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.g-input-success {
    border-color: var(--color-success);
}

/* Textarea */
.g-textarea {
    min-height: 100px;
    resize: vertical;
}

/* Select */
.g-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
    cursor: pointer;
}

/* Checkbox & Radio */
.g-checkbox,
.g-radio {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.g-checkbox input,
.g-radio input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-brand-primary);
}

/* Form Help Text */
.g-form-hint {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.g-form-error {
    color: var(--color-danger);
}

/* Input Group */
.g-input-group {
    display: flex;
}

.g-input-group .g-input {
    flex: 1;
    border-radius: var(--input-radius) 0 0 var(--input-radius);
}

.g-input-group .g-btn {
    border-radius: 0 var(--btn-radius) var(--btn-radius) 0;
}

/* Form Row (horizontal layout) */
.g-form-row {
    display: flex;
    gap: var(--space-4);
}

.g-form-row .g-form-group {
    flex: 1;
}

/* ========================================
   5. BADGE & STATUS COMPONENTS
   ======================================== */

/* Base Badge */
.g-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--badge-padding-y) var(--badge-padding-x);
    font-size: var(--badge-font-size);
    font-weight: var(--badge-font-weight);
    line-height: 1;
    border-radius: var(--badge-radius);
    border: 1px solid;
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

/* Badge Variants */
.g-badge-primary {
    background: var(--color-brand-primary-subtle);
    color: var(--color-brand-primary-light);
    border-color: var(--color-brand-primary);
}

.g-badge-success {
    background: var(--color-success-bg);
    color: var(--color-success-light);
    border-color: var(--color-success-border);
}

.g-badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning-light);
    border-color: var(--color-warning-border);
}

.g-badge-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger-light);
    border-color: var(--color-danger-border);
}

.g-badge-info {
    background: var(--color-info-bg);
    color: var(--color-info-light);
    border-color: var(--color-info-border);
}

.g-badge-neutral {
    background: var(--color-neutral-bg);
    color: var(--color-neutral-light);
    border-color: var(--color-neutral-border);
}

/* Badge Sizes */
.g-badge-sm {
    padding: var(--space-0-5) var(--space-1-5);
    font-size: var(--font-size-2xs);
}

.g-badge-lg {
    padding: var(--space-1-5) var(--space-3);
    font-size: var(--font-size-sm);
}

/* Pill Badge */
.g-badge-pill {
    border-radius: var(--radius-full);
}

/* Status Dot */
.g-status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    display: inline-block;
}

.g-status-dot-success { background: var(--color-success); }
.g-status-dot-warning { background: var(--color-warning); }
.g-status-dot-danger { background: var(--color-danger); }
.g-status-dot-info { background: var(--color-info); }
.g-status-dot-neutral { background: var(--color-neutral); }

/* Attribute Badge */
.g-attr-badge {
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-default);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.g-attr-badge-name {
    color: var(--color-brand-primary);
    font-weight: var(--font-weight-normal);
    margin-right: var(--space-1);
}

.g-attr-badge-value {
    font-weight: var(--font-weight-bold);
}

/* ========================================
   6. TABLE COMPONENTS
   ======================================== */

/* Table Container */
.g-table-container {
    background: var(--surface-default);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-default);
    overflow: hidden;
}

/* Base Table */
.g-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.g-table thead {
    background: var(--table-header-bg);
    border-bottom: 2px solid var(--border-default);
}

.g-table th {
    padding: var(--table-cell-padding-y) var(--table-cell-padding-x);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--text-secondary);
    white-space: nowrap;
}

.g-table td {
    padding: var(--table-cell-padding-y) var(--table-cell-padding-x);
    vertical-align: middle;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.g-table tbody tr {
    transition: background var(--duration-fast);
}

.g-table tbody tr:hover {
    background: var(--table-row-hover-bg);
}

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

/* Sortable Column */
.g-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.g-table th.sortable:hover {
    background: var(--bg-hover);
}

.g-table th.sortable .sort-icon {
    margin-left: var(--space-1);
    opacity: 0.5;
}

.g-table th.sortable.sort-asc .sort-icon::after { content: '↑'; opacity: 1; }
.g-table th.sortable.sort-desc .sort-icon::after { content: '↓'; opacity: 1; }

/* Table Variants */
.g-table-compact th,
.g-table-compact td {
    padding: var(--space-2) var(--space-3);
}

.g-table-striped tbody tr:nth-child(even) {
    background: var(--bg-tertiary);
}

/* Clickable Row */
.g-table-clickable tbody tr {
    cursor: pointer;
}

/* ========================================
   7. ALERT & NOTIFICATION COMPONENTS
   ======================================== */

/* Base Alert */
.g-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
    font-size: var(--font-size-sm);
    animation: slideDown var(--duration-slow) var(--ease-out);
}

.g-alert-icon {
    flex-shrink: 0;
    font-size: var(--font-size-lg);
}

.g-alert-content {
    flex: 1;
}

.g-alert-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.g-alert-dismiss {
    flex-shrink: 0;
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity var(--duration-fast);
}

.g-alert-dismiss:hover {
    opacity: 1;
}

/* Alert Variants */
.g-alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-light);
    border: 1px solid var(--color-success-border);
}

.g-alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning-light);
    border: 1px solid var(--color-warning-border);
}

.g-alert-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger-light);
    border: 1px solid var(--color-danger-border);
    border-left: 4px solid var(--color-danger);
}

.g-alert-info {
    background: var(--color-info-bg);
    color: var(--color-info-light);
    border: 1px solid var(--color-info-border);
}

.g-alert-neutral {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-default);
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========================================
   8. MODAL COMPONENTS
   ======================================== */

/* Modal Overlay */
.g-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--surface-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal), visibility var(--duration-normal);
}

.g-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Modal Content */
.g-modal {
    background: var(--surface-default);
    border-radius: var(--modal-radius);
    box-shadow: var(--modal-shadow);
    max-width: var(--modal-max-width);
    width: 95%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn var(--duration-slow) var(--ease-out);
}

.g-modal-sm { max-width: 450px; }
.g-modal-lg { max-width: 800px; }
.g-modal-xl { max-width: 1000px; }

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Modal Header */
.g-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--modal-padding);
    border-bottom: 1px solid var(--border-default);
}

.g-modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
}

.g-modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: color var(--duration-fast);
}

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

/* Modal Body */
.g-modal-body {
    padding: var(--modal-padding);
    overflow-y: auto;
    flex: 1;
}

/* Modal Footer */
.g-modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--modal-padding);
    border-top: 1px solid var(--border-default);
}

/* ========================================
   9. NAVIGATION COMPONENTS
   ======================================== */

/* Tabs */
.g-tabs {
    display: flex;
    gap: var(--space-1);
    border-bottom: 2px solid var(--border-default);
    margin-bottom: var(--space-6);
}

.g-tab {
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition-colors);
    margin-bottom: -2px;
}

.g-tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.g-tab.active {
    color: var(--color-brand-primary);
    border-bottom-color: var(--color-brand-primary);
}

.g-tab-content {
    display: none;
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Breadcrumb */
.g-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.g-breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.g-breadcrumb-item::after {
    content: "/";
    color: var(--text-disabled);
}

.g-breadcrumb-item:last-child::after {
    display: none;
}

.g-breadcrumb-link {
    color: var(--text-link);
    text-decoration: none;
}

.g-breadcrumb-link:hover {
    text-decoration: underline;
}

.g-breadcrumb-current {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

/* ========================================
   10. LOADING STATES
   ======================================== */

/* Loading Overlay */
.g-loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-overlay);
}

/* Loading Spinner */
.g-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-default);
    border-top-color: var(--color-brand-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

.g-spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.g-spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Loading Card */
.g-loading-card {
    background: var(--surface-default);
    padding: var(--space-10) var(--space-16);
    border-radius: var(--card-radius);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.g-loading-text {
    margin-top: var(--space-5);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

/* Skeleton Loader */
.g-skeleton {
    background: linear-gradient(90deg, 
        var(--bg-secondary) 25%, 
        var(--bg-hover) 50%, 
        var(--bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-default);
}

.g-skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-2);
}

.g-skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: var(--space-3);
}

.g-skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

.g-skeleton-image {
    width: 100%;
    height: 200px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Empty State */
.g-empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--text-muted);
}

.g-empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-5);
}

.g-empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.g-empty-state-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-6);
}

/* ========================================
   UTILITY: HIDDEN CLASS
   ======================================== */
.hidden {
    display: none !important;
}

.g-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =====================================================
   LEGACY BUTTON COMPATIBILITY
   =====================================================
   
   These aliases map old button classes to the new design 
   system. This allows gradual migration without breaking 
   existing templates.
   
   OLD CLASS              → NEW CLASS (via alias)
   ---------------------------------------------
   .btn                   → g-btn base styles
   .btn-primary           → g-btn-primary
   .btn-secondary         → g-btn-secondary  
   .btn-success           → g-btn-success
   .btn-danger            → g-btn-danger
   .btn-warning           → g-btn-warning
   .btn-outline           → g-btn-outline-primary
   .btn-outline-primary   → g-btn-outline-primary
   .btn-outline-success   → g-btn-outline-success
   .btn-outline-danger    → g-btn-outline-danger
   .btn-sm / .btn-small   → g-btn-sm
   .btn-icon              → g-btn-icon
   .btn-link              → g-btn-link
   
   Page-specific buttons are also unified:
   .btn-edit, .btn-save   → g-btn-primary
   .btn-back, .btn-cancel → g-btn-secondary
   .btn-import            → g-btn-primary (with icon)
   .btn-reserve           → g-btn-primary
   .btn-copy, .btn-track  → g-btn-ghost icon buttons
   .tab-btn               → g-tab (navigation tabs)
   .period-btn            → g-btn-group toggle style
   
   ===================================================== */

/* Base .btn class - applies g-btn foundation */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-size: var(--btn-font-size);
    font-weight: var(--btn-font-weight);
    font-family: inherit;
    line-height: var(--line-height-normal);
    text-decoration: none;
    border: none;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: var(--transition-colors), var(--transition-transform);
    white-space: nowrap;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Primary button - uses brand primary color */
.btn-primary,
.btn-edit,
.btn-save,
.btn-import,
.btn-reserve {
    background: var(--color-brand-primary);
    color: white;
}

.btn-primary:hover:not(:disabled),
.btn-edit:hover:not(:disabled),
.btn-save:hover:not(:disabled),
.btn-import:hover:not(:disabled),
.btn-reserve:hover:not(:disabled) {
    background: var(--color-brand-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* Secondary button - neutral style */
.btn-secondary,
.btn-back,
.btn-cancel,
.btn-muted {
    background: var(--btn-secondary-bg);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled),
.btn-back:hover:not(:disabled),
.btn-cancel:hover:not(:disabled),
.btn-muted:hover:not(:disabled) {
    background: var(--btn-secondary-hover);
}

/* Success button - green confirmation actions */
.btn-success {
    background: var(--color-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: var(--color-success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-success);
}

/* Danger button - red destructive actions */
.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-danger);
}

/* Warning button - yellow/orange caution actions */
.btn-warning {
    background: var(--color-warning);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: var(--color-warning-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-warning);
}

/* Outline buttons - transparent with border */
.btn-outline,
.btn-outline-primary {
    background: transparent;
    color: var(--color-brand-primary);
    border: 2px solid var(--color-brand-primary);
}

.btn-outline:hover:not(:disabled),
.btn-outline-primary:hover:not(:disabled) {
    background: var(--color-brand-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-success {
    background: transparent;
    color: var(--color-success);
    border: 2px solid var(--color-success);
}

.btn-outline-success:hover:not(:disabled) {
    background: var(--color-success);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-danger {
    background: transparent;
    color: var(--color-danger);
    border: 2px solid var(--color-danger);
}

.btn-outline-danger:hover:not(:disabled) {
    background: var(--color-danger);
    color: white;
    transform: translateY(-2px);
}

/* Small buttons */
.btn-sm,
.btn-small {
    padding: var(--btn-padding-y-sm) var(--btn-padding-x-sm);
    font-size: var(--font-size-xs);
}

/* Large buttons */
.btn-lg {
    padding: var(--btn-padding-y-lg) var(--btn-padding-x-lg);
    font-size: var(--font-size-base);
}

/* Full width button */
.btn-block,
.btn-full-width {
    width: 100%;
}

/* Link style button - text only, no background */
.btn-link {
    background: transparent;
    color: var(--text-link);
    padding: 0;
    border: none;
}

.btn-link:hover:not(:disabled) {
    text-decoration: underline;
    color: var(--text-link-hover);
}

/* Icon-only buttons */
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    border: none;
    cursor: pointer;
    transition: var(--transition-colors);
}

.btn-icon:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-icon.delete:hover:not(:disabled) {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* Copy/Track mini action buttons */
.btn-copy,
.btn-track {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-colors);
}

.btn-copy:hover:not(:disabled),
.btn-track:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--color-brand-primary);
}

/* Tab buttons - navigation style */
.tab-btn {
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition-colors);
    margin-bottom: -2px;
}

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

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

/* Period selector buttons (dashboard) */
.period-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-colors);
}

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

.period-btn.active {
    background: var(--color-brand-primary);
    color: white;
    border-color: var(--color-brand-primary);
}

/* Quick action buttons (dashboard) */
.quick-action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    background: var(--surface-default);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-colors);
}

.quick-action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--color-brand-primary);
    color: var(--color-brand-primary);
}

/* Kebab menu button */
.kebab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-colors);
}

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

/* Action buttons (production schedule) */
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-colors);
}

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

.btn-action.btn-fulfill:hover {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success);
}

.btn-action.btn-reschedule:hover {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.btn-action.btn-complete:hover,
.btn-action.btn-mark-produced:hover {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success);
}

.btn-action.btn-unmark-produced:hover {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: var(--color-danger);
}

/* Inventory adjustment buttons */
.adjust-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    background: var(--surface-default);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-colors);
}

.adjust-btn:hover {
    background: var(--bg-hover);
    border-color: var(--color-brand-primary);
}

/* Add/Remove item buttons (forms) */
.btn-add-item,
.btn-add-option,
.add-variation-btn,
.add-image-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-brand-primary);
    background: transparent;
    border: 1px dashed var(--color-brand-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-colors);
}

.btn-add-item:hover,
.btn-add-option:hover,
.add-variation-btn:hover,
.add-image-btn:hover {
    background: var(--color-brand-primary-subtle);
}

.btn-remove-item,
.btn-remove-option,
.btn-remove-variation,
.btn-remove-image {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    background: transparent;
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-colors);
}

.btn-remove-item:hover,
.btn-remove-option:hover,
.btn-remove-variation:hover,
.btn-remove-image:hover {
    background: var(--color-danger);
    color: white;
}

/* ========================================
   TABLE ACTION BUTTONS
   Unified small action buttons for tables
   ======================================== */

/* Base view-btn-small - gray/secondary by default */
.view-btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: white;
    background: var(--text-muted);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-colors);
    text-decoration: none;
    white-space: nowrap;
    margin-right: 4px;
}

.view-btn-small:last-child {
    margin-right: 0;
}

.view-btn-small:hover {
    background: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

/* Primary variant - blue/purple for main actions */
.view-btn-small.btn-primary-small {
    background: var(--color-brand-primary);
}

.view-btn-small.btn-primary-small:hover {
    background: var(--color-brand-primary-hover);
}

/* Success variant - green */
.view-btn-small.btn-success {
    background: var(--color-success);
}

.view-btn-small.btn-success:hover {
    background: var(--color-success-hover);
}

/* Danger variant - red for delete actions */
.view-btn-small.btn-danger-small {
    background: var(--color-danger);
}

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

/* Warning variant - orange */
.view-btn-small.btn-warning-small {
    background: var(--color-warning);
}

.view-btn-small.btn-warning-small:hover {
    background: var(--color-warning-hover);
}

/* Bulk shipping page buttons */
.btn-bs {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-size: var(--btn-font-size);
    font-weight: var(--btn-font-weight);
    font-family: inherit;
    border: none;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: var(--transition-colors), var(--transition-transform);
}

.btn-bs:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-bs-primary:hover:not(:disabled) {
    background: var(--color-brand-primary-hover);
}

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

.btn-bs-secondary:hover:not(:disabled) {
    background: var(--btn-secondary-hover);
}

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

.btn-bs-success:hover:not(:disabled) {
    background: var(--color-success-hover);
}