/* Modern Black & White Corporate Dashboard */

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f9f9f9;
    --text-primary: #000000;
    --text-secondary: #888888;
    --border-color: #e5e5e5;
    --border-hover: #000000;
    --accent-black: #000000;
    --accent-gray: #333333;
    --accent-light: #f5f5f5;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

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

html {
    scroll-behavior: smooth;
    font-size: 14px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   LOGIN STYLES
   ============================================ */
body {
    background: linear-gradient(135deg, #f9f9f9 0%, #f0f0f0 100%);
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-box {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    max-width: 420px;
    width: 100%;
    border: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.02em;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.login-form label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.25rem;
}

.login-form input {
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    background: var(--bg-secondary);
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent-black);
    background: var(--bg-primary);
}

.login-form button {
    background: var(--accent-black);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
}

.login-form button:hover {
    background: var(--accent-gray);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.login-form button:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
}

.login-error {
    background: #fff5f5;
    border: 1px solid #ffe5e5;
    color: var(--text-primary);
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    display: none;
}

.login-error.show {
    display: block;
}

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */
.app-shell {
    display: none;
}

.app-shell[style*="display: grid"] {
    display: grid !important;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    display: flex;
    flex-direction: column;
    width: 280px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    height: 100vh;
    position: sticky;
    top: 0;
}

.sidebar-header {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.02em;
}

.sidebar-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-secondary);
    border-left-color: var(--accent-black);
}

.nav-item.active {
    background: var(--accent-black);
    color: #fff;
    border-left-color: var(--accent-black);
}

.nav-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.nav-label {
    font-weight: 500;
    font-size: 0.9rem;
}

.sidebar-footer {
    margin-top: auto;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
}

.logout-button {
    width: 100%;
    padding: 0.875rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 8px;
}

.logout-button:hover {
    background: var(--accent-black);
    color: #fff;
    border-color: var(--accent-black);
}

.logout-icon {
    font-size: 1rem;
}

/* ============================================
   MAIN PANEL
   ============================================ */
.main-panel {
    flex: 1;
    padding: 2rem;
    background: var(--bg-secondary);
    overflow-y: auto;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.hero-content {
    flex: 1;
}

.eyebrow {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.hero h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.75rem 0;
    letter-spacing: -0.02em;
}

.hero-copy {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.refresh-button {
    background: var(--accent-black);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.refresh-button:hover {
    background: var(--accent-gray);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.refresh-icon {
    font-size: 0.875rem;
}

/* ============================================
   STATUS BANNER
   ============================================ */
.status-banner {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.status-banner.error {
    background: #fff5f5;
    border: 1px solid #ffe5e5;
    color: var(--text-primary);
}

.status-banner.info {
    background: #f0f9f9;
    border: 1px solid #e0e0e0;
    color: var(--text-primary);
}

/* ============================================
   KPI GRID
   ============================================ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.kpi-card.warning {
    border-color: #d4a02c;
    background: linear-gradient(135deg, #fff 0%, #fff9f0 100%);
}

.kpi-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.kpi-card strong {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.kpi-sublabel {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ============================================
   PANELS
   ============================================ */
.panel {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.panel-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.span-two {
    grid-column: span 2;
}

/* ============================================
   FILTERS
   ============================================ */
.filter-row,
.filter-stack {
    display: grid;
    gap: 0.75rem;
}

.filter-row {
    grid-template-columns: 1.5fr 1fr auto;
    align-items: center;
}

.filter-stack {
    grid-template-columns: 1fr;
}

.filter-row input,
.filter-stack input,
.filter-row select,
.filter-stack select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    background: var(--bg-primary);
    font-family: inherit;
    transition: all 0.2s ease;
}

.filter-row input:focus,
.filter-stack input:focus,
.filter-row select:focus,
.filter-stack select:focus {
    outline: none;
    border-color: var(--accent-black);
}

.filter-button {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.filter-button:hover {
    background: var(--accent-black);
    color: #fff;
    border-color: var(--accent-black);
}

/* ============================================
   TABLES
   ============================================ */
.table-wrap {
    overflow: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

th {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

/* ============================================
   LIST CARDS
   ============================================ */
.list-wrap {
    display: grid;
    gap: 0.75rem;
}

.list-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}

.list-card strong {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.list-meta {
    display: flex;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    flex-wrap: wrap;
}

/* ============================================
   PILLS
   ============================================ */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-secondary);
}

.pill.low_stock {
    background: #fff5f5;
    color: #a02820;
    border: 1px solid #ffe5e5;
}

.pill.out_of_stock {
    background: #ffe5e5;
    color: #a02820;
}

.pill.in_stock {
    background: #e8f0e8;
    color: #347458;
    border: 1px solid #d6e8d4;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    padding: 2rem;
    color: var(--text-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    text-align: center;
    font-size: 0.9rem;
}

/* ============================================
   CONTENT GRID
   ============================================ */
.content-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

/* ============================================
   PPC STYLES (overrides from ppc.css)
   ============================================ */
.ppc-upload-section {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.ppc-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.file-info {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.upload-button {
    background: var(--accent-black);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.upload-button:hover {
    background: var(--accent-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-icon {
    font-size: 1.125rem;
}

.reset-button {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reset-button:hover {
    background: var(--accent-black);
    color: #fff;
    border-color: var(--accent-black);
}

.reset-icon {
    font-size: 0.875rem;
}

.download-button {
    background: var(--accent-black);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.download-button:hover {
    background: var(--accent-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-icon {
    font-size: 1rem;
}

/* ============================================
   LOCATION CELL
   ============================================ */
.location-cell {
    min-width: 140px;
}

.location-item {
    font-size: 0.875rem;
    padding: 0.25rem 0;
}

/* ============================================
   AI INSIGHTS
   ============================================ */
.ai-insights-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.ai-insights-content {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-primary);
    white-space: pre-line;
}

.ai-no-data {
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.875rem;
}

/* ============================================
   ACTION SUMMARY
   ============================================ */
.action-summary-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.action-summary-card {
    padding: 1.25rem;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.2s ease;
}

.action-summary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.action-summary-card.summary-danger {
    border-color: #ffe5e5;
    background: linear-gradient(135deg, #fff 0%, #fff9f5 100%);
}

.action-summary-card.summary-warning {
    border-color: #fff5f5;
    background: linear-gradient(135deg, #fff 0%, #fff9f5 100%);
}

.action-summary-card.summary-success {
    border-color: #e8f0e8;
    background: linear-gradient(135deg, #fff 0%, #f0fff5 100%);
}

.action-summary-card.summary-info {
    border-color: #e0e0e0;
    background: linear-gradient(135deg, #fff 0%, #f9f9f9 100%);
}

.action-summary-card summary-total {
    background: var(--accent-black);
    color: #fff;
}

.action-summary-card.summary-total .kpi-label,
.action-summary-card.summary-total strong {
    color: #fff;
}

.action-summary-card.summary-total .kpi-sublabel {
    color: rgba(255, 255, 255, 0.7);
}

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

.actions-header h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.actions-filter select {
    padding: 0.625rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.actions-filter select:focus {
    outline: none;
    border-color: var(--accent-black);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1400px) {
    .kpi-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .content-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .action-summary-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1100px) {
    .kpi-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .action-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .span-two {
        grid-column: span 1;
    }
}

@media (max-width: 900px) {
    .app-shell {
        display: flex;
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
        overflow-y: visible;
    }

    .nav-item {
        flex-shrink: 0;
    }

    .main-panel {
        padding: 1.5rem;
    }

    .hero,
    .panel-header,
    .filter-row {
        flex-direction: column;
    }

    .filter-row {
        grid-template-columns: 1fr;
    }

    .hero-meta {
        margin-top: 1rem;
    }

    .action-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .action-details,
    .action-metrics {
        flex-direction: column;
        gap: 0.4rem;
    }
}

@media (max-width: 600px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .sidebar-title {
        font-size: 1.25rem;
    }

    .kpi-card strong {
        font-size: 1.5rem;
    }