/* =============================================================================
   CSS Variables & Reset
   ============================================================================= */

:root {
    /* Colors */
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-hover: #f1f5f9;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;

    /* Status colors */
    --color-success: #22c55e;
    --color-success-bg: #dcfce7;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-bg: #fee2e2;
    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;

    /* Primary */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;

    /* Course colors */
    --color-course-positive: #22c55e;
    --color-course-negative: #ef4444;
    --color-course-neutral: #64748b;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Borders */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

    /* Nav */
    --nav-height: 3.5rem;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
}

/* =============================================================================
   Navigation
   ============================================================================= */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-lg);
    z-index: 100;
    gap: var(--space-xl);
}

.nav.hidden {
    display: none;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

.nav-logo {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    flex: 1;
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

.nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.nav-actions {
    display: flex;
    gap: var(--space-sm);
}

/* =============================================================================
   Main Content
   ============================================================================= */

.main {
    margin-top: var(--nav-height);
    padding: var(--space-xl);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.main.full-page {
    margin-top: 0;
    padding: 0;
    max-width: none;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* =============================================================================
   Typography
   ============================================================================= */

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.25;
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
}

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

.text-sm {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

/* =============================================================================
   Buttons
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text);
    border-color: var(--color-border);
}

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
}

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

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
}

.btn-icon {
    width: 2rem;
    height: 2rem;
    padding: 0;
}

/* =============================================================================
   Cards
   ============================================================================= */

.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

/* =============================================================================
   Stats Cards (Dashboard)
   ============================================================================= */

.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.stat-value.positive {
    color: var(--color-course-positive);
}

.stat-value.negative {
    color: var(--color-course-negative);
}

.stat-change {
    font-size: 0.75rem;
    margin-top: var(--space-xs);
}

.stat-change.up {
    color: var(--color-success);
}

.stat-change.down {
    color: var(--color-danger);
}

/* =============================================================================
   Course Chart
   ============================================================================= */

.course-chart {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.course-chart canvas {
    width: 100%;
    height: 300px;
}

/* =============================================================================
   Forms
   ============================================================================= */

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    transition: border-color 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

.form-error {
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-top: var(--space-xs);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

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

/* =============================================================================
   Tables
   ============================================================================= */

.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: var(--color-bg);
}

.table tr:hover td {
    background: var(--color-bg-hover);
}

.table .amount {
    font-family: var(--font-mono);
    text-align: right;
}

.table .amount.positive {
    color: var(--color-success);
}

.table .amount.negative {
    color: var(--color-danger);
}

/* =============================================================================
   Transaction List
   ============================================================================= */

.transaction-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.transaction-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    align-items: center;
    cursor: pointer;
    transition: all 0.15s;
}

.transaction-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.transaction-category {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.transaction-info {
    min-width: 0;
}

.transaction-description {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.transaction-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.transaction-amount {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1rem;
}

.transaction-amount.positive {
    color: var(--color-success);
}

.transaction-amount.negative {
    color: var(--color-text);
}

/* =============================================================================
   Pattern Badge (structureel/incidenteel)
   ============================================================================= */

.pattern-badge {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-full);
    font-size: 0.65rem;
    font-weight: 500;
    margin-left: 0.25rem;
    text-transform: lowercase;
}

.pattern-badge.structural {
    background: var(--color-info-bg);
    color: var(--color-info);
}

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

/* =============================================================================
   Category Badge
   ============================================================================= */

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.category-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-full);
}

/* =============================================================================
   Modal
   ============================================================================= */

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--space-lg);
}

.modal {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--color-text-muted);
    border-radius: var(--radius-md);
}

.modal-close:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
}

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

/* =============================================================================
   Toast Notifications
   ============================================================================= */

#toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: slideIn 0.2s ease-out;
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* =============================================================================
   Login Page
   ============================================================================= */

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

.login-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
}

/* =============================================================================
   File Upload
   ============================================================================= */

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.15s;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.upload-text {
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* =============================================================================
   Progress Bar
   ============================================================================= */

.progress {
    height: 0.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    transition: width 0.3s;
}

.progress-bar.success {
    background: var(--color-success);
}

.progress-bar.warning {
    background: var(--color-warning);
}

.progress-bar.danger {
    background: var(--color-danger);
}

/* =============================================================================
   Empty State
   ============================================================================= */

.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.empty-description {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* =============================================================================
   Loading
   ============================================================================= */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
}

.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* =============================================================================
   Filters
   ============================================================================= */

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

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

.filter-group label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* =============================================================================
   Pagination
   ============================================================================= */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.pagination-btn {
    min-width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.15s;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =============================================================================
   Utilities
   ============================================================================= */

.hidden {
    display: none !important;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

/* =============================================================================
   Responsive
   ============================================================================= */

@media (max-width: 768px) {
    .nav {
        flex-wrap: wrap;
        height: auto;
        padding: var(--space-md);
    }

    .nav-links {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding: var(--space-sm) 0;
    }

    .main {
        padding: var(--space-md);
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .filters {
        flex-direction: column;
    }

    .transaction-item {
        grid-template-columns: auto 1fr;
    }

    .transaction-amount {
        grid-column: 1 / -1;
        text-align: right;
    }
}

/* =============================================================================
   Category Overview / Pattern Analysis
   ============================================================================= */

.category-patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
    padding: var(--space-md);
}

.pattern-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.pattern-card:hover {
    box-shadow: var(--shadow-md);
}

.pattern-card-header {
    padding: var(--space-md);
    background: var(--color-bg-card);
}

.pattern-card-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.pattern-card-title .category-icon {
    font-size: 1.25rem;
}

.pattern-card-title .category-name {
    font-weight: 600;
    flex: 1;
}

.pattern-card-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pattern-metric .metric-value {
    font-size: 1.25rem;
    font-weight: 600;
}

.pattern-metric .metric-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Pattern Frequency */
.pattern-frequency {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    font-size: 0.75rem;
}

.pattern-frequency .frequency-label {
    font-weight: 600;
    color: var(--color-text);
}

.pattern-frequency .regularity-label {
    font-size: 0.65rem;
    color: var(--color-text-muted);
}

.pattern-frequency.very-regular {
    background: var(--color-success-bg);
}

.pattern-frequency.very-regular .frequency-label {
    color: var(--color-success);
}

.pattern-frequency.regular {
    background: var(--color-info-bg);
}

.pattern-frequency.regular .frequency-label {
    color: var(--color-info);
}

.pattern-frequency.variable {
    background: var(--color-warning-bg);
}

.pattern-frequency.variable .frequency-label {
    color: var(--color-warning);
}

.pattern-frequency.irregular {
    background: var(--color-danger-bg);
}

.pattern-frequency.irregular .frequency-label {
    color: var(--color-danger);
}

/* Pattern Chips */
.pattern-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
}

.pattern-chip {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 4px 8px;
    border-radius: var(--radius-full);
    background: var(--color-bg);
    font-size: 0.7rem;
    border: 1px solid var(--color-border);
}

.pattern-chip.very-regular {
    background: var(--color-success-bg);
    border-color: var(--color-success);
}

.pattern-chip.regular {
    background: var(--color-info-bg);
    border-color: var(--color-info);
}

.pattern-chip.variable {
    background: var(--color-warning-bg);
    border-color: var(--color-warning);
}

.pattern-chip.irregular {
    background: var(--color-danger-bg);
    border-color: var(--color-danger);
}

.chip-freq {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.6rem;
}

.chip-amount {
    font-weight: 500;
}

.chip-phase {
    color: var(--color-text-muted);
}

/* Pattern Metrics Bar */
.pattern-metrics-bar {
    display: flex;
    justify-content: space-around;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.metric-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.metric-item .metric-icon {
    font-size: 0.875rem;
}

.metric-item .metric-text {
    white-space: nowrap;
}

/* Statistics Grid (expanded details) */
.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.stat-section {
    padding: var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.stat-section h4 {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-border);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
    font-size: 0.8rem;
}

.stat-row .stat-label {
    color: var(--color-text-muted);
}

.stat-row .stat-value {
    font-weight: 500;
}

/* Patterns Detail Grid */
.patterns-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.pattern-detail-card {
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
}

.pattern-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-border);
}

.pattern-freq-label {
    font-weight: 600;
    font-size: 0.8rem;
}

.pattern-regularity {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-card);
}

.pattern-regularity.zeer-regelmatig {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.pattern-regularity.regelmatig {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.pattern-regularity.variabel {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.pattern-regularity.onregelmatig {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.pattern-detail-stats .stat-row {
    font-size: 0.75rem;
}

/* Outlier explanation badge */
.outlier-explanation {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.outlier-best-match {
    font-size: 0.65rem;
    color: var(--color-text-light);
}

/* Pattern Details (expandable) */
.pattern-details {
    display: none;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
}

.pattern-details.show {
    display: block;
}

.layer-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.layer-detail h4 {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
}

.layer-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs);
}

.layer-stat {
    text-align: center;
}

.layer-stat .stat-value {
    font-size: 0.875rem;
    font-weight: 600;
}

.layer-stat .stat-label {
    font-size: 0.65rem;
    color: var(--color-text-muted);
}

/* Outliers */
.outliers-section {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-md);
}

.outliers-section h4 {
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
}

.outliers-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.outlier-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
}

.outlier-item:hover {
    background: var(--color-bg-hover);
}

.outlier-item.amount {
    border-left: 3px solid var(--color-danger);
}

.outlier-item.timing {
    border-left: 3px solid var(--color-warning);
}

.outlier-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.outlier-date {
    color: var(--color-text-muted);
    white-space: nowrap;
}

.outlier-type-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.outlier-type-badge.amount {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.outlier-type-badge.timing {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.outlier-amount {
    font-weight: 600;
    text-align: right;
}

.outlier-info {
    display: flex;
    justify-content: space-between;
    grid-column: 1 / -1;
}

.outlier-counterparty {
    color: var(--color-text-muted);
}

.outlier-zscore {
    color: var(--color-danger);
    font-weight: 500;
}

.outlier-expected {
    grid-column: 1 / -1;
    font-size: 0.7rem;
    color: var(--color-text-light);
}

/* Expand button */
.pattern-expand-btn {
    width: 100%;
    padding: var(--space-sm);
    border: none;
    background: transparent;
    color: var(--color-primary);
    font-size: 0.75rem;
    cursor: pointer;
    border-top: 1px solid var(--color-border);
}

.pattern-expand-btn:hover {
    background: var(--color-bg-hover);
}

/* =============================================================================
   Pattern Engine V2 - Dynamic Pattern Visualization
   ============================================================================= */

/* Predictions Panel */
.predictions-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.predictions-panel .card-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.predictions-list {
    max-height: 300px;
    overflow-y: auto;
}

.prediction-item {
    display: grid;
    grid-template-columns: 100px auto 1fr auto;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    transition: background 0.15s;
}

.prediction-item:last-child {
    border-bottom: none;
}

.prediction-item:hover {
    background: var(--color-bg-hover);
}

.prediction-date {
    font-weight: 500;
    font-size: 0.875rem;
}

.prediction-category {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.prediction-category-icon {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.prediction-category-name {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.prediction-amount {
    font-family: var(--font-mono);
    font-weight: 600;
    text-align: right;
}

.prediction-confidence {
    font-size: 0.7rem;
    color: var(--color-text-light);
}

/* Pattern Card V2 */
.pattern-card-v2 {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.pattern-card-v2:hover {
    box-shadow: var(--shadow-md);
}

.pattern-card-v2 .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.pattern-card-v2 .category-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.pattern-card-v2 .category-icon {
    font-size: 1.25rem;
}

.pattern-card-v2 .category-name {
    font-weight: 600;
    font-size: 1rem;
}

.pattern-card-v2 .category-stats {
    display: flex;
    gap: var(--space-lg);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Discovered Patterns Section */
.discovered-patterns {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
}

.discovered-patterns-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.pattern-row {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.pattern-row:last-child {
    border-bottom: none;
}

.pattern-row.clickable {
    cursor: pointer;
    border-radius: var(--radius-sm);
    margin: 0 calc(-1 * var(--space-sm));
    padding: var(--space-sm);
    transition: background-color 0.15s ease;
}

.pattern-row.clickable:hover {
    background-color: var(--color-surface);
}

.pattern-period {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 500;
}

.pattern-period-icon {
    color: var(--color-primary);
}

.pattern-period-value {
    font-size: 0.875rem;
}

.pattern-period-unit {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.pattern-amount {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.pattern-amount-range {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* Confidence Bar */
.confidence-bar {
    width: 80px;
    height: 6px;
    background: var(--color-bg-hover);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.confidence-fill.high {
    background: var(--color-success);
}

.confidence-fill.medium {
    background: var(--color-warning);
}

.confidence-fill.low {
    background: var(--color-danger);
}

.confidence-label {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 2px;
}

/* Next Expected */
.pattern-next {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.pattern-next-date {
    font-weight: 500;
    color: var(--color-text);
}

/* Pattern Timeline */
.pattern-timeline {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.timeline-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.timeline-legend {
    display: flex;
    gap: var(--space-md);
    font-size: 0.65rem;
    color: var(--color-text-light);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
}

.legend-dot.matched {
    background: var(--color-success);
}

.legend-dot.predicted {
    background: var(--color-info);
    opacity: 0.5;
}

.legend-dot.outlier {
    background: var(--color-danger);
}

.timeline-track {
    position: relative;
    height: 40px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.timeline-months {
    display: flex;
    justify-content: space-between;
    padding: 0 var(--space-sm);
    font-size: 0.65rem;
    color: var(--color-text-light);
    margin-bottom: 4px;
}

.timeline-dots {
    position: relative;
    height: 24px;
    margin: 0 var(--space-sm);
}

.timeline-dot {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    transform: translateX(-50%);
    top: 7px;
    cursor: pointer;
    transition: transform 0.15s;
}

.timeline-dot:hover {
    transform: translateX(-50%) scale(1.3);
}

.timeline-dot.matched {
    background: var(--color-success);
}

.timeline-dot.predicted {
    background: var(--color-info);
    opacity: 0.5;
    border: 2px dashed var(--color-info);
    background: transparent;
}

.timeline-dot.outlier {
    background: var(--color-danger);
}

/* Discovery Indicator */
.discovery-indicator {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-info-bg);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

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

.discovery-text {
    flex: 1;
    font-size: 0.75rem;
    color: var(--color-info);
}

.buffer-progress {
    width: 100px;
    height: 4px;
    background: var(--color-bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.buffer-progress-fill {
    height: 100%;
    background: var(--color-info);
    transition: width 0.3s;
}

.buffer-count {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* Stats Footer */
.pattern-stats-footer {
    display: flex;
    justify-content: space-around;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.stat-item-icon {
    font-size: 0.875rem;
}

.stat-item-value {
    font-weight: 500;
    color: var(--color-text);
}

/* Outliers V2 */
.outliers-section-v2 {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.outliers-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-danger);
    margin-bottom: var(--space-sm);
}

.outlier-item-v2 {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-md);
    padding: var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-xs);
    cursor: pointer;
    transition: background 0.15s;
}

.outlier-item-v2:hover {
    background: var(--color-bg-hover);
}

.outlier-item-v2:last-child {
    margin-bottom: 0;
}

.outlier-date-v2 {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.outlier-info-v2 {
    min-width: 0;
}

.outlier-counterparty-v2 {
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.outlier-explanation-v2 {
    font-size: 0.65rem;
    color: var(--color-warning);
}

.outlier-amount-v2 {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
}

/* No Patterns State */
.no-patterns {
    padding: var(--space-lg);
    text-align: center;
    color: var(--color-text-muted);
}

.no-patterns-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    opacity: 0.5;
}

.no-patterns-text {
    font-size: 0.875rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .prediction-item {
        grid-template-columns: 80px 1fr auto;
    }

    .prediction-category-name {
        display: none;
    }

    .pattern-row {
        grid-template-columns: 1fr auto;
        gap: var(--space-sm);
    }

    .confidence-bar {
        display: none;
    }

    .pattern-next {
        display: none;
    }

    .timeline-track {
        display: none;
    }
}