:root {
    /* Base Palette - Clean, Utilitarian, Linear-style Dark Mode */
    --bg-layer-0: #0E0E10;
    /* Main app bg */
    --bg-layer-1: #18181B;
    /* Sidebar / Cards */
    --bg-layer-2: #27272A;
    /* Hovers / Inputs */
    --bg-layer-3: #3F3F46;
    /* Borders / Dividers */

    --text-primary: #F4F4F5;
    --text-secondary: #A1A1AA;
    --text-tertiary: #71717A;

    /* Brand / Accent */
    --primary: #6366f1;
    /* Indigo-500 similar to many SaaS tools */
    --primary-hover: #4f46e5;
    --primary-bg: rgba(99, 102, 241, 0.1);

    /* Functional Colors */
    --success: #10B981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #EF4444;
    --danger-bg: rgba(239, 68, 68, 0.1);

    /* UI Tokens */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

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

    --header-height: 64px;
    --sidebar-width: 260px;
}

* {
    box-sizing: border-box;
    outline: none;
}

body {
    margin: 0;
    font-family: var(--font-stack);
    background-color: var(--bg-layer-0);
    color: var(--text-primary);
    font-size: 14px;
    overflow: hidden;
    /* App-like feel */
}

/* Layout Grid */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-layer-1);
    border-right: 1px solid var(--bg-layer-2);
    display: flex;
    flex-direction: column;
    padding: 16px;
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    padding: 0 8px;
}

.logo-box {
    width: 32px;
    height: 32px;
    background: var(--primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.brand-text h1 {
    font-size: 15px;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
}

.brand-text .subtitle {
    font-size: 12px;
    color: var(--text-tertiary);
}

.brand-text .dim {
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.nav-group label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
    padding-left: 8px;
}

.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-stack);
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.nav-item:hover {
    background-color: var(--bg-layer-2);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--bg-layer-2);
    color: var(--text-primary);
    box-shadow: inset 2px 0 0 var(--primary);
    /* Left indicator */
}

.nav-item .material-symbols-rounded {
    font-size: 18px;
}

.user-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--bg-layer-2);
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-layer-3);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info .name {
    font-weight: 500;
    font-size: 13px;
}

.user-info .status {
    font-size: 11px;
    color: var(--success);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-layer-0);
}

.top-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--bg-layer-2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background-color: rgba(14, 14, 16, 0.8);
    backdrop-filter: blur(8px);
    z-index: 10;
}

.breadcrumbs {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.breadcrumbs .hidden {
    display: none;
}

.search-wrapper {
    position: relative;
    width: 320px;
}

.search-wrapper .icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 18px;
}

.search-wrapper input {
    width: 100%;
    background-color: var(--bg-layer-1);
    border: 1px solid var(--bg-layer-3);
    padding: 8px 10px 8px 36px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-stack);
    transition: border-color 0.2s;
}

.search-wrapper input:focus {
    border-color: var(--primary);
}

.viewport {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* --- COMPONENTS: Inventory List --- */
/* We are moving from grid cards to a structured list/table for better density */

.inventory-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.inventory-table th {
    text-align: left;
    color: var(--text-tertiary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    padding: 12px 16px;
    border-bottom: 1px solid var(--bg-layer-2);
}

.inventory-row {
    background-color: var(--bg-layer-1);
    transition: background 0.1s;
    cursor: pointer;
}

.inventory-row:hover {
    background-color: var(--bg-layer-2);
}

/* Add spacing between rows like a modern list */
.inventory-row td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--bg-layer-0);
    /* gap effect */
}

.inventory-row:first-child td {
    border-top: 1px solid var(--bg-layer-2);
}

.cell-main {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cell-img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    object-fit: cover;
    background-color: var(--bg-layer-3);
}

.cell-info div {
    font-weight: 500;
    color: var(--text-primary);
}

.cell-info span {
    font-size: 12px;
    color: var(--text-secondary);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.badge.stock {
    background: var(--success-bg);
    color: var(--success);
}

.badge.out {
    background: var(--warning-bg);
    color: var(--warning);
}

/* --- DETAIL VIEW (Slide Over or Full Page) --- */
.detail-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 24px;
    height: 100%;
}

.detail-sidebar {
    background: var(--bg-layer-1);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--bg-layer-2);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.detail-main {
    background: var(--bg-layer-1);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--bg-layer-2);
    display: flex;
    flex-direction: column;
}

.big-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius-md);
    background-color: var(--bg-layer-0);
    margin-bottom: 12px;
}

.detail-field label {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.detail-field div {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.action-btn {
    width: 100%;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--bg-layer-2);
    color: var(--text-primary);
    border-color: var(--bg-layer-3);
}

.btn-secondary:hover {
    background: var(--bg-layer-3);
}

/* Timeline / Bitacora */
.timeline {
    margin-top: 20px;
    position: relative;
    padding-left: 20px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--bg-layer-2);
}

.timeline-item {
    position: relative;
    margin-bottom: 24px;
}

.timeline-dot {
    position: absolute;
    left: -25px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--bg-layer-1);
}

.type-in {
    background: var(--success);
}

.type-out {
    background: var(--warning);
}

.type-new {
    background: var(--primary);
}

.timeline-content {
    background: var(--bg-layer-2);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: 12px;
}

.timeline-date {
    color: var(--text-tertiary);
}

.timeline-actor {
    color: var(--text-primary);
    font-weight: 600;
}

.timeline-note {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.4;
}

/* Forms */
input,
textarea,
select {
    background: var(--bg-layer-0);
    border: 1px solid var(--bg-layer-3);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    width: 100%;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
}