/* ============================================
   CB Classifier v3 — Premium SaaS Design System
   ============================================ */

/* --- Design Tokens --- */
:root {
    /* Colors - Neutral */
    --color-bg: #f8f9fb;
    --color-surface: #ffffff;
    --color-surface-hover: #f3f4f6;
    --color-surface-active: #eef0f3;
    --color-border: #e2e5ea;
    --color-border-light: #eef0f3;
    --color-divider: #f0f1f3;

    /* Colors - Text */
    --color-text-primary: #111827;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    --color-text-inverse: #ffffff;

    /* Colors - Accent */
    --color-accent: #4f46e5;
    --color-accent-hover: #4338ca;
    --color-accent-light: #eef2ff;
    --color-accent-subtle: #f5f3ff;

    /* Colors - Semantic */
    --color-success: #059669;
    --color-success-light: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-warning-border: #fde68a;
    --color-danger: #dc2626;
    --color-danger-light: #fef2f2;
    --color-danger-border: #fecaca;
    --color-info: #2563eb;
    --color-info-light: #eff6ff;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;

    /* Sidebar */
    --sidebar-width: 240px;

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 180ms ease;
}


/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-bg);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent-hover); }

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}
h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

p { color: var(--color-text-secondary); }

small { font-size: var(--font-size-xs); color: var(--color-text-tertiary); }

hr {
    border: none;
    border-top: 1px solid var(--color-border-light);
    margin: var(--space-6) 0;
}

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

::selection {
    background: var(--color-accent-light);
    color: var(--color-accent);
}


/* ============================================
   APP LAYOUT (Sidebar + Main)
   ============================================ */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-6) var(--space-5);
    border-bottom: 1px solid var(--color-border-light);
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: var(--color-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.brand-icon .brand-lucide,
.brand-icon svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-inverse);
    stroke: var(--color-text-inverse);
}

.brand-name {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-primary);
    display: block;
    line-height: 1.2;
}

.brand-version {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4) var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}
.nav-item:hover {
    color: var(--color-text-primary);
    background: var(--color-surface-hover);
}
.nav-item.active {
    color: var(--color-accent);
    background: var(--color-accent-light);
}
.nav-item .nav-icon,
.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke-width: 1.75;
}

.sidebar-footer {
    padding: var(--space-3);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.nav-item-secondary {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}
.nav-item-secondary:hover {
    color: var(--color-text-secondary);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--space-8) var(--space-10);
    min-height: 100vh;
    max-width: 100%;
}


/* ============================================
   PAGE HEADER
   ============================================ */

.page-header {
    margin-bottom: var(--space-8);
}
.page-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-1);
}
.page-header p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}
.page-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}


/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-xs);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}
.card-header h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
}

.card-body { /* container only */ }

.card-footer {
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}


/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}
.btn:hover {
    background: var(--color-surface-hover);
    border-color: #d1d5db;
    color: var(--color-text-primary);
}
.btn:active {
    background: var(--color-surface-active);
}
.btn:disabled, .btn[aria-busy="true"] {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn svg {
    width: 15px;
    height: 15px;
    stroke-width: 2;
}

.btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-text-inverse);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-text-inverse);
}

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

.btn-ghost {
    border-color: transparent;
    background: transparent;
    color: var(--color-text-secondary);
}
.btn-ghost:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
}

.btn-xs {
    padding: 2px var(--space-2);
    font-size: var(--font-size-xs);
    border-radius: 4px;
}

.btn-full { width: 100%; }

.btn-icon {
    padding: var(--space-2);
    border-color: transparent;
    background: transparent;
    color: var(--color-text-tertiary);
}
.btn-icon:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.btn-group {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}


/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
    margin-bottom: var(--space-4);
}
.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="search"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, select:focus, textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.08);
}
input::placeholder { color: var(--color-text-tertiary); }

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
    border-radius: 3px;
}

/* Compact form inputs for tables */
.input-compact {
    padding: var(--space-1) var(--space-2) !important;
    font-size: var(--font-size-xs) !important;
    border-radius: 4px !important;
}

select.input-compact {
    padding-right: var(--space-6) !important;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.form-inline {
    display: flex;
    gap: var(--space-3);
    align-items: flex-end;
}

.form-section {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
}


/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 2px var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: 9999px;
    white-space: nowrap;
    line-height: 1.5;
}

.badge-success {
    background: var(--color-success-light);
    color: var(--color-success);
}
.badge-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}
.badge-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}
.badge-neutral {
    background: var(--color-surface-hover);
    color: var(--color-text-secondary);
}
.badge-accent {
    background: var(--color-accent-light);
    color: var(--color-accent);
}


/* ============================================
   ALERTS
   ============================================ */

.alert {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
    border: 1px solid;
}
.alert svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    stroke-width: 2;
}
.alert-error {
    background: var(--color-danger-light);
    border-color: var(--color-danger-border);
    color: var(--color-danger);
}
.alert-success {
    background: var(--color-success-light);
    border-color: var(--color-success-border);
    color: var(--color-success);
}
.alert-info {
    background: var(--color-info-light);
    border-color: #bfdbfe;
    color: var(--color-info);
}


/* ============================================
   TABLES (Premium)
   ============================================ */

.table-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: visible;
    box-shadow: var(--shadow-xs);
}

.table-container table {
    font-size: var(--font-size-sm);
}

.table-container thead th {
    background: var(--color-bg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-tertiary);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 5;
}

.table-container tbody td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-divider);
    vertical-align: middle;
    color: var(--color-text-primary);
}

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

.table-container tbody tr:hover {
    background: var(--color-surface-hover);
}

.table-container tbody tr.row-highlight-success {
    background: #f0fdf4;
}
.table-container tbody tr.row-highlight-warning {
    background: #fffbeb;
}
.table-container tbody tr.row-highlight-danger {
    background: #fef8f8;
}

.td-mono {
    font-variant-numeric: tabular-nums;
    font-feature-settings: 'tnum';
}
.td-right { text-align: right; }
.td-center { text-align: center; }
.td-nowrap { white-space: nowrap; }

/* Table inline selects */
.table-container select,
.table-container input[type="text"],
.table-container input[type="number"] {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    border-radius: 4px;
    min-width: 100px;
    margin: 0;
    background: var(--color-surface);
}

.table-container input[type="checkbox"] {
    margin: 0;
}

.table-scroll {
    overflow-x: auto;
    overflow-y: visible;
}


/* ============================================
   IMPORT PAGE
   ============================================ */

.import-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-10) var(--space-8);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--color-surface);
}
.dropzone:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}
.dropzone-active {
    border-color: var(--color-accent) !important;
    background: var(--color-accent-light) !important;
}
.dropzone-has-file {
    border-color: var(--color-success);
    background: var(--color-success-light);
    border-style: solid;
}

.dropzone-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    background: var(--color-accent-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}
.dropzone-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
    stroke: var(--color-accent);
}
.dropzone-icon-success {
    background: var(--color-success-light);
}
.dropzone-icon-success svg {
    color: var(--color-success);
    stroke: var(--color-success);
}

.dropzone-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}
.dropzone-subtitle {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}
.dropzone-filename {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-success);
    margin-bottom: var(--space-1);
}

/* Info cards */
.info-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
}
.info-card-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.info-card-title svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-tertiary);
}
.info-card ul {
    list-style: none;
    padding: 0;
}
.info-card li {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    padding: var(--space-1) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.info-card li svg {
    width: 14px;
    height: 14px;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

/* Multi-select bar */
.multi-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--color-accent-light);
    border: 1px solid #c7d2fe;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-weight: 500;
}


/* ============================================
   REVIEW PAGE
   ============================================ */

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}
.review-title h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2);
}
.review-meta {
    display: flex;
    gap: var(--space-5);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}
.review-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}
.review-meta strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.review-actions {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

/* Filter bar */
.filter-bar {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.filter-tabs {
    display: flex;
    gap: var(--space-1);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 2px;
}
.filter-tab {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    font-family: var(--font-family);
}
.filter-tab:hover {
    color: var(--color-text-primary);
    background: var(--color-surface);
}
.filter-tab.active {
    color: var(--color-text-primary);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
}

.filter-search {
    display: flex;
    gap: var(--space-2);
    align-items: center;
    margin-left: auto;
}
.filter-search input[type="search"] {
    width: 220px;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
}
.filter-search select {
    width: 200px;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
}

.filter-info {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-3);
}

/* Confidence badge */
.confidence-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.confidence-high {
    background: var(--color-success-light);
    color: var(--color-success);
}
.confidence-medium {
    background: var(--color-warning-light);
    color: var(--color-warning);
}
.confidence-low {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

/* AI tag */
.ai-tag {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 1px 5px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-left: var(--space-1);
}

/* Label cell */
.label-cell {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.label-primary {
    font-weight: 500;
    color: var(--color-text-primary);
}
.label-secondary {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* Receipt / attachment cell */
.receipt-cell {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}
.receipt-upload {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-tertiary);
    transition: all var(--transition-fast);
}
.receipt-upload svg {
    width: 14px;
    height: 14px;
}
.receipt-upload:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-light);
}
.receipt-upload.has-file {
    border-color: var(--color-success-border);
    background: var(--color-success-light);
    color: var(--color-success);
}

/* Action buttons */
.action-btns {
    display: flex;
    gap: 4px;
}

.validated-btn {
    background: var(--color-success-light) !important;
    border-color: var(--color-success-border) !important;
    color: var(--color-success) !important;
}

/* Comment input */
.comment-input {
    padding: var(--space-1) var(--space-2) !important;
    font-size: var(--font-size-xs) !important;
    min-width: 100px;
}

/* Global actions bar */
.global-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-6);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border-light);
    gap: var(--space-4);
    flex-wrap: wrap;
}


/* ============================================
   DASHBOARD
   ============================================ */

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: var(--shadow-xs);
}
.kpi-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: var(--space-2);
}
.kpi-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}
.kpi-sub {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
}
.kpi-value-warning { color: var(--color-warning); }
.kpi-value-success { color: var(--color-success); }

/* Confidence bar */
.confidence-summary {
    margin-bottom: var(--space-8);
}
.conf-bar {
    display: flex;
    height: 8px;
    border-radius: 9999px;
    overflow: hidden;
    background: var(--color-border-light);
    margin-bottom: var(--space-3);
}
.conf-segment {
    transition: width 0.5s ease;
    min-width: 2px;
}
.conf-high { background: var(--color-success); }
.conf-med { background: var(--color-warning); }
.conf-low { background: var(--color-danger); }

.conf-legend {
    display: flex;
    gap: var(--space-5);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}
.conf-legend-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 9999px;
    margin-right: var(--space-1);
    vertical-align: middle;
}
.conf-legend-dot-high { background: var(--color-success); }
.conf-legend-dot-med { background: var(--color-warning); }
.conf-legend-dot-low { background: var(--color-danger); }

/* Charts grid */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}
.chart-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-xs);
}
.chart-card-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}


/* ============================================
   SETTINGS PAGE
   ============================================ */

.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.tab-btn {
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-tertiary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.tab-btn:hover {
    color: var(--color-text-primary);
}
.tab-active {
    color: var(--color-accent) !important;
    border-bottom-color: var(--color-accent) !important;
    font-weight: 600;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
}
.settings-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.settings-form {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
}

.settings-search {
    max-width: 320px;
    margin-bottom: var(--space-4);
}
.settings-search input {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
}

details {
    margin-top: var(--space-3);
}
details summary {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    cursor: pointer;
    padding: var(--space-2) 0;
}
details summary:hover {
    color: var(--color-text-secondary);
}


/* ============================================
   NOTIFICATION (toast)
   ============================================ */

.notification {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-inverse);
    cursor: pointer;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    max-width: 360px;
}
.notification.success { background: var(--color-success); }
.notification.info { background: var(--color-info); }
.notification.warning { background: var(--color-warning); }
.notification.error { background: var(--color-danger); }


/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-8);
    color: var(--color-text-tertiary);
}
.empty-state-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    background: var(--color-surface-hover);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}
.empty-state-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-text-tertiary);
}
.empty-state-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}
.empty-state-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}


/* ============================================
   AUTH PAGES (Login / Register)
   ============================================ */

.auth-body {
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: var(--space-4);
}

.auth-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-6);
}
.auth-logo {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    background: var(--color-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}
.auth-logo svg {
    width: 24px;
    height: 24px;
    color: var(--color-text-inverse);
    stroke: var(--color-text-inverse);
}
.auth-header h1 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-1);
}
.auth-header p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.auth-form {
    margin-bottom: var(--space-4);
}

.auth-footer {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}
.auth-footer a {
    font-weight: 500;
    margin-left: var(--space-1);
}


/* ============================================
   UTILITIES
   ============================================ */

.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-tertiary); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-mono { font-variant-numeric: tabular-nums; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none; }


/* ============================================
   PAGE TRANSITIONS
   ============================================ */

.main-content {
    animation: fadeInUp 0.3s ease both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card entrance stagger */
.kpi-card,
.chart-card,
.info-card,
.table-container,
.card {
    animation: fadeIn 0.35s ease both;
}
.kpi-card:nth-child(1) { animation-delay: 0.03s; }
.kpi-card:nth-child(2) { animation-delay: 0.06s; }
.kpi-card:nth-child(3) { animation-delay: 0.09s; }
.kpi-card:nth-child(4) { animation-delay: 0.12s; }
.kpi-card:nth-child(5) { animation-delay: 0.15s; }
.kpi-card:nth-child(6) { animation-delay: 0.18s; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Toast animation */
.notification {
    animation: slideInRight 0.25s ease both;
}
@keyframes slideInRight {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* Settings form expand */
.settings-form,
.add-form-wrapper {
    animation: expandDown 0.2s ease both;
}
@keyframes expandDown {
    from { opacity: 0; transform: scaleY(0.96); transform-origin: top; }
    to   { opacity: 1; transform: scaleY(1); }
}


/* ============================================
   SKELETON LOADERS
   ============================================ */

.skeleton {
    position: relative;
    overflow: hidden;
    background: var(--color-surface-hover);
    border-radius: var(--radius-sm);
    color: transparent !important;
}
.skeleton * { visibility: hidden; }

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.5) 50%,
        transparent 100%
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.skeleton-line {
    height: 14px;
    background: var(--color-surface-hover);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-2);
}
.skeleton-line::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.5) 50%, transparent 100%);
    animation: shimmer 1.5s infinite;
}
.skeleton-line-short { width: 60%; }
.skeleton-line-medium { width: 80%; }

.skeleton-block {
    height: 120px;
    background: var(--color-surface-hover);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-4);
}
.skeleton-block::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.5) 50%, transparent 100%);
    animation: shimmer 1.5s infinite;
}

/* Skeleton grid for KPIs */
.skeleton-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}
.skeleton-kpi {
    height: 100px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}
.skeleton-kpi::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.4) 50%, transparent 100%);
    animation: shimmer 1.5s infinite;
}


/* ============================================
   MOBILE SIDEBAR (hamburger)
   ============================================ */

.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    z-index: 200;
    padding: 0 var(--space-4);
    align-items: center;
    gap: var(--space-3);
}

.hamburger {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    color: var(--color-text-primary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    padding: 0;
    flex-shrink: 0;
}
.hamburger:hover {
    background: var(--color-surface-hover);
}
.hamburger svg {
    width: 20px;
    height: 20px;
}

.mobile-brand {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-primary);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 299;
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.25s ease;
}
.sidebar-overlay.visible {
    opacity: 1;
}

/* Sidebar mobile slide */
.sidebar {
    transition: transform 0.25s ease;
}


/* ============================================
   DARK MODE
   ============================================ */

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f1117;
        --color-surface: #1a1d27;
        --color-surface-hover: #22252f;
        --color-surface-active: #2a2d38;
        --color-border: #2e3140;
        --color-border-light: #252836;
        --color-divider: #22252f;

        --color-text-primary: #f1f3f5;
        --color-text-secondary: #9ca3af;
        --color-text-tertiary: #6b7280;
        --color-text-inverse: #ffffff;

        --color-accent: #818cf8;
        --color-accent-hover: #6366f1;
        --color-accent-light: rgba(129, 140, 248, 0.12);
        --color-accent-subtle: rgba(129, 140, 248, 0.06);

        --color-success: #34d399;
        --color-success-light: rgba(52, 211, 153, 0.1);
        --color-success-border: rgba(52, 211, 153, 0.25);
        --color-warning: #fbbf24;
        --color-warning-light: rgba(251, 191, 36, 0.1);
        --color-warning-border: rgba(251, 191, 36, 0.25);
        --color-danger: #f87171;
        --color-danger-light: rgba(248, 113, 113, 0.1);
        --color-danger-border: rgba(248, 113, 113, 0.25);
        --color-info: #60a5fa;
        --color-info-light: rgba(96, 165, 250, 0.1);

        --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    }

    body { color-scheme: dark; }

    input, select, textarea {
        background: var(--color-surface) !important;
        color: var(--color-text-primary);
        border-color: var(--color-border);
    }
    input::placeholder { color: var(--color-text-tertiary); }

    .dropzone { background: var(--color-surface); }
    .dropzone:hover { background: var(--color-surface-hover); }

    .multi-actions {
        border-color: rgba(129, 140, 248, 0.2);
    }

    .table-container tbody tr.row-highlight-success { background: rgba(52, 211, 153, 0.06); }
    .table-container tbody tr.row-highlight-warning { background: rgba(251, 191, 36, 0.06); }
    .table-container tbody tr.row-highlight-danger  { background: rgba(248, 113, 113, 0.06); }

    .table-container select,
    .table-container input[type="text"] {
        background: var(--color-bg) !important;
    }

    .skeleton::after,
    .skeleton-line::after,
    .skeleton-block::after,
    .skeleton-kpi::after {
        background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.04) 50%, transparent 100%);
    }

    .mobile-header {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .sidebar-overlay {
        background: rgba(0, 0, 0, 0.55);
    }

    /* Auth pages dark */
    .auth-body { background: var(--color-bg); }
    .auth-card { background: var(--color-surface); border-color: var(--color-border); }
    .auth-logo { background: var(--color-accent); }

    .conf-bar { background: var(--color-border); }
}


/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .sidebar {
        width: 200px;
    }
    .main-content {
        margin-left: 200px;
        padding: var(--space-6);
    }
    :root { --sidebar-width: 200px; }
}

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--sidebar-width);
        transform: translateX(-100%);
        z-index: 300;
        box-shadow: var(--shadow-lg);
    }
    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding: var(--space-4);
        padding-top: calc(56px + var(--space-4));
    }

    .import-grid {
        grid-template-columns: 1fr;
    }
    .chart-grid {
        grid-template-columns: 1fr;
    }
    .review-header {
        flex-direction: column;
    }
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .filter-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .filter-search {
        margin-left: 0;
        flex-direction: column;
    }
    .filter-search input,
    .filter-search select {
        width: 100%;
    }
    .global-actions {
        flex-direction: column;
    }
    .review-meta {
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}