@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');

:root {
    /* MD3 Light Theme Colors */
    --color-primary: #0061a4;
    --color-on-primary: #ffffff;
    --color-primary-container: #d1e4ff;
    --color-on-primary-container: #001d36;
    
    --color-secondary: #535f70;
    --color-on-secondary: #ffffff;
    --color-secondary-container: #d7e3f7;
    --color-on-secondary-container: #101c2b;
    
    --color-tertiary: #6b5778;
    --color-tertiary-container: #f2daff;
    --color-on-tertiary-container: #251431;

    /* Surface & Background */
    --color-bg: #fdfcff;
    --color-surface: #fdfcff;
    --color-surface-variant: #e0e2ec;
    --color-on-surface-variant: #43474e;
    
    --color-surface-container-lowest: #ffffff;
    --color-surface-container-low: #f3f3fa;
    --color-surface-container: #ededf4;
    --color-surface-container-high: #e7e8ee;
    --color-surface-container-highest: #e2e2e9;
    
    /* Text */
    --color-text: #1a1c1e;
    --color-text-muted: #43474e;
    
    /* Borders */
    --color-border: #c4c6d0;
    --color-outline-variant: #c4c6d0;
    
    /* Status Colors mapped to MD3-like tones */
    --color-success: #146c2e;
    --color-success-bg: #c4eed0;
    
    --color-danger: #ba1a1a;
    --color-danger-bg: #ffdad6;
    
    --color-warning: #7d5260; 
    --color-warning-bg: #ffd8e4;
    
    --color-unknown: #73777f;
    --color-unknown-bg: #e2e2e9;
    
    /* Elevation (Shadows) */
    --elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
    --elevation-2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
    --elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
    
    /* Shape (Border Radius) */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-standard: 200ms cubic-bezier(0.2, 0, 0, 1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    color: var(--color-text);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-standard);
}
a:hover {
    color: var(--color-primary-container);
}

/* Layout */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* MD3 Topbar */
.topbar {
    background: var(--color-surface);
    color: var(--color-text);
    position: sticky;
    top: 0;
    z-index: 40;
    padding: 1rem 0;
    transition: background-color var(--transition-standard);
}
.topbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--color-text);
}
.brand svg {
    color: var(--color-primary);
}
.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: none;
    background: var(--color-primary-container);
    color: var(--color-on-primary-container);
}

/* MD3 Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full); /* MD3 pill buttons */
    border: none;
    cursor: pointer;
    transition: all var(--transition-standard);
    font-family: inherit;
    letter-spacing: 0.01em;
}
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}
.btn-primary:hover {
    background-color: var(--color-primary);
    box-shadow: var(--elevation-1);
    opacity: 0.92;
}
.btn-secondary {
    background-color: var(--color-secondary-container);
    color: var(--color-on-secondary-container);
}
.btn-secondary:hover {
    background-color: var(--color-secondary-container);
    box-shadow: var(--elevation-1);
    opacity: 0.92;
}
.btn-danger {
    background-color: transparent;
    color: var(--color-danger);
    border: 1px solid var(--color-outline-variant);
}
.btn-danger:hover {
    background-color: var(--color-danger-bg);
    border-color: transparent;
}
.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.875rem;
}
.btn:disabled, .btn.disabled {
    opacity: 0.38;
    background-color: rgba(28, 27, 31, 0.12);
    color: rgba(28, 27, 31, 0.38);
    box-shadow: none;
    cursor: not-allowed;
}

/* Stat Cards (MD3 Elevated Card style) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0 2rem 0;
}
.stat-card {
    background: var(--color-surface-container-low);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border: 1px solid transparent; /* No border in MD3 if elevated, or subtle outline */
    transition: background-color var(--transition-standard), box-shadow var(--transition-standard);
}
.stat-card:hover {
    background: var(--color-surface-container);
}
.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}
.stat-value {
    font-size: 2.25rem;
    font-weight: 400;
    line-height: 2.75rem;
    color: var(--color-text);
}

/* MD3 Category Tabs (Primary Navigation) */
.tabs-container {
    border-bottom: 1px solid var(--color-outline-variant);
    position: relative;
}
.tabs-slider-wrapper {
    display: flex;
    align-items: center;
    position: relative;
}
.tabs-scroll {
    display: flex;
    overflow-x: auto;
    gap: 0;
    flex: 1;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.tabs-scroll::-webkit-scrollbar { display: none; }

/* Fade edges to hint overflow */
.tabs-slider-wrapper::before,
.tabs-slider-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 40px;
    z-index: 2;
    pointer-events: none;
    transition: opacity var(--transition-standard);
}
.tabs-slider-wrapper::before {
    left: 32px;
    background: linear-gradient(to right, var(--color-surface), transparent);
}
.tabs-slider-wrapper::after {
    right: 32px;
    background: linear-gradient(to left, var(--color-surface), transparent);
}
.tabs-slider-wrapper.at-start::before { opacity: 0; }
.tabs-slider-wrapper.at-end::after   { opacity: 0; }

/* Arrow buttons */
.tabs-arrow {
    flex-shrink: 0;
    width: 32px;
    height: 100%;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    z-index: 3;
    transition: color var(--transition-standard), opacity var(--transition-standard);
    opacity: 1;
}
.tabs-arrow:hover { color: var(--color-primary); }
.tabs-arrow.hidden { opacity: 0; pointer-events: none; }

.tab {
    padding: 0.875rem 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-standard);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 4px 4px 0 0;
}
.tab:hover {
    color: var(--color-text);
    background-color: var(--color-surface-variant);
}
.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.tab-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    padding: 0 6px;
    height: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    background: var(--color-surface-container-highest);
    color: var(--color-text-muted);
    line-height: 1;
    transition: all var(--transition-standard);
}
.tab.active .tab-count {
    background: var(--color-primary-container);
    color: var(--color-primary);
}
.tab-add {
    background: transparent;
    border: none;
    color: var(--color-primary);
    font-weight: 500;
    cursor: pointer;
    padding: 0.875rem 0.5rem;
    border-bottom: 3px solid transparent;
}
.tab-add:hover {
    background-color: var(--color-primary-container);
    color: var(--color-on-primary-container);
}

/* Main Content Area */
.content-wrapper {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    margin-bottom: 4rem;
}

/* Toolbar */
.toolbar {
    padding: 1rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-surface);
}
.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.toolbar-select-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--color-surface-container-high);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 1.25rem;
}
.form-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    margin-bottom: 0px;
    color: var(--color-primary);
    padding-left: 1rem;
    position: relative;
    top: 8px;
    background: transparent;
    width: min-content;
    white-space: nowrap;
    z-index: 1;
}
.form-control, .form-select {
    width: 100%;
    padding: 1rem 1rem 0.5rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-surface-container-highest);
    border: none;
    border-bottom: 1px solid var(--color-on-surface-variant);
    border-radius: 4px 4px 0 0;
    transition: background-color var(--transition-standard), border-bottom-color var(--transition-standard);
}
.form-control:focus, .form-select:focus {
    outline: none;
    background-color: var(--color-surface-variant);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: calc(0.5rem - 1px);
}

/* MD3 Table */
.table-responsive {
    overflow-x: auto;
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-lg);
    background: var(--color-surface-container-lowest);
}
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
th {
    padding: 1rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-outline-variant);
    background: var(--color-surface-container-low);
}
td {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--color-outline-variant);
    vertical-align: middle;
}
tr {
    transition: background-color var(--transition-standard);
}
tr:hover {
    background-color: var(--color-surface-container-high);
}
tr.selected {
    background-color: var(--color-primary-container);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}
.badge-instock {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}
.badge-outofstock {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}
.badge-unrecognized {
    background-color: var(--color-unknown-bg);
    color: var(--color-unknown);
}
.badge-failed {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}
.badge-pending {
    background-color: transparent;
    color: var(--color-text-muted);
    border: 1px dashed var(--color-outline-variant);
}
.badge-icon {
    width: 14px;
    height: 14px;
}

/* Checkboxes (MD3 style) */
.checkbox-custom {
    appearance: none;
    background-color: transparent;
    margin: 0;
    font: inherit;
    color: currentColor;
    width: 1.25em;
    height: 1.25em;
    border: 2px solid var(--color-on-surface-variant);
    border-radius: 2px;
    display: grid;
    place-content: center;
    cursor: pointer;
    transition: all var(--transition-standard);
}
.checkbox-custom::before {
    content: "";
    width: 0.8em;
    height: 0.8em;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--color-on-primary);
    transform-origin: center;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}
.checkbox-custom:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}
.checkbox-custom:checked::before {
    transform: scale(1);
}
.checkbox-custom:disabled {
    border-color: rgba(28, 27, 31, 0.38);
    background-color: transparent;
    cursor: not-allowed;
}

/* Utilities */
.text-muted { color: var(--color-text-muted); }
.font-medium { font-weight: 500; }
.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    max-width: 250px;
}
.empty-state {
    padding: 4rem 2rem;
    text-align: center;
    color: var(--color-text-muted);
}
.empty-state svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* MD3 Dialogs (Modals) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.32);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-standard);
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.modal-container {
    background-color: var(--color-surface-container-high);
    border-radius: 28px;
    width: 100%;
    max-width: 480px;
    box-shadow: var(--elevation-3);
    border: none;
    transform: scale(0.9) translateY(10px);
    transition: transform var(--transition-standard);
    overflow: hidden;
}
.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}
.modal-header {
    padding: 1.5rem 1.5rem 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-title {
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 2rem;
    color: var(--color-text);
}
.modal-close {
    background: transparent;
    border: none;
    color: var(--color-on-surface-variant);
    cursor: pointer;
    border-radius: var(--radius-full);
    padding: 0.5rem;
    aspect-ratio: 1;
    transition: background-color var(--transition-standard);
}
.modal-close:hover {
    background-color: rgba(67, 71, 78, 0.08); /* state layer */
}
.modal-body {
    padding: 0 1.5rem 1.5rem 1.5rem;
}
.modal-footer {
    padding: 1rem 1.5rem 1.5rem 1.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* MD3 Snackbars (Toasts) */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.toast {
    background-color: #313033;
    color: #f4eff4;
    padding: 0.875rem 1rem;
    border-radius: 4px;
    box-shadow: var(--elevation-3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    animation: toast-slide-in 0.3s cubic-bezier(0.2, 0, 0, 1);
    min-width: 300px;
}
.toast-icon { opacity: 0.8; color: var(--color-primary-container); }
.toast.success .toast-icon { color: var(--color-success-bg); }
.toast.error .toast-icon { color: var(--color-danger-bg); }

@keyframes toast-slide-in {
    from { opacity: 0; transform: translateY(100%); }
    to { opacity: 1; transform: translateY(0); }
}

/* Progress Loader */
.checking-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--color-primary-container);
    color: var(--color-on-primary-container);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(0, 97, 164, 0.3);
    border-top-color: var(--color-on-primary-container);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === Clickable Stat Cards === */
.stat-card {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    border: 1.5px solid transparent;
    position: relative;
    overflow: hidden;
}
.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-primary);
    opacity: 0;
    transition: opacity var(--transition-standard);
    pointer-events: none;
}
.stat-card:hover::after { opacity: 0.04; }
.stat-card:hover {
    border-color: var(--color-outline-variant);
    box-shadow: var(--elevation-1);
    color: inherit;
    text-decoration: none;
}
.stat-card-active {
    border-color: var(--color-primary) !important;
    background: var(--color-primary-container) !important;
}
.stat-card-active .stat-label { color: var(--color-on-primary-container); }
.stat-card-active .stat-value { color: var(--color-primary); }
.stat-card-active .stat-hint  { color: var(--color-on-primary-container); }
.stat-card-success:hover { background: #d6f5e3; }
.stat-card-danger:hover  { background: #ffe9e9; }
.stat-hint {
    font-size: 0.75rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-top: 0.125rem;
}

/* === Stat Filter Banner === */
.stat-filter-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-primary-container);
    color: var(--color-on-primary-container);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.25rem;
    margin: 1.25rem 0 0 0;
    font-size: 0.875rem;
    gap: 1rem;
}
.stat-filter-banner strong { font-weight: 600; }

/* === Pagination Bar === */
.pagination-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--color-outline-variant);
    background: var(--color-surface-container-low);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    gap: 1rem;
    flex-wrap: wrap;
}
.pagination-controls {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* === Settings Page === */
.settings-card {
    background: var(--color-surface-container-lowest);
    border: 1px solid var(--color-outline-variant);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.settings-card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-outline-variant);
    background: var(--color-surface-container-low);
}
.settings-card-title {
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--color-text);
}
.settings-card-body {
    padding: 1.5rem;
}
.settings-list {
    /* No extra padding — each item handles it */
}
.settings-list-item {
    border-bottom: 1px solid var(--color-outline-variant);
}
.settings-list-item:last-child {
    border-bottom: none;
}
.settings-list-view,
.settings-list-edit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    flex-wrap: wrap;
}
.cat-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: var(--radius-full);
    background: var(--color-primary-container);
    color: var(--color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

/* === Settings Alerts === */
.settings-alert {
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}
.settings-alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}
.settings-alert-error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}