/* ===================================================================
   EXPENSE STRUCTURE - Editorial Redesign (Mar 2026)
   Aligned with Margin Analysis & Break-Even/CVP design language
   =================================================================== */

/* ===== Design Tokens ===== */
.expense-structure-container {
    /* Module-specific semantic colours (not in shared tokens) */
    --exp-cogs: #DC2626;
    --exp-cogs-light: #FEE2E2;
    --exp-opex: #D97706;
    --exp-opex-light: #FEF3C7;
    --exp-fixed: #1E40AF;
    --exp-fixed-light: #DBEAFE;
    --exp-variable: #059669;
    --exp-variable-light: #D1FAE5;

    --exp-profit: #047857;
    --exp-profit-light: #D1FAE5;
    --exp-loss: #BE123C;
    --exp-loss-light: #FFE4E6;
    --exp-warning: #CA8A04;
    --exp-warning-light: #FEF9C3;

    /* Aliases mapping to shared tokens */
    --exp-accent: var(--liq-accent);
    --exp-accent-light: var(--liq-accent-light);
    --exp-bg: var(--liq-bg);
    --exp-surface: var(--liq-surface);
    --exp-border: var(--liq-border-light);
    --exp-border-light: var(--liq-border-lighter);
    --exp-shadow-sm: var(--liq-shadow-sm);
    --exp-shadow-md: var(--liq-shadow-md);
    --exp-shadow-lg: var(--liq-shadow-lg);
    --exp-text: var(--liq-text);
    --exp-text-primary: var(--liq-text);
    --exp-text-secondary: var(--liq-text-secondary);
    --exp-text-tertiary: var(--liq-text-muted);
    --exp-text-muted: var(--liq-text-muted);
    --exp-hero-from: var(--liq-hero-from);
    --exp-hero-to: var(--liq-hero-to);
    --exp-display: var(--liq-font-display);
    --exp-body: var(--liq-font-body);
    --exp-mono: var(--liq-font-mono);
}

/* ===== Container ===== */
.expense-structure-container {
    font-family: var(--exp-body);
    background: var(--exp-bg);
    padding: 0;
    min-height: calc(100vh - 200px);
    position: relative;
}

/* ===== Module Actions Bar (Budget/Explainer Buttons) ===== */
.expense-module-actions {
    padding: 0.75rem 1.25rem !important;
    border-bottom: 1px solid var(--exp-border) !important;
    margin-bottom: 0 !important;
    text-align: right !important;
    background: var(--exp-bg);
}

.expense-module-actions .module-action-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    background: var(--exp-surface);
    color: var(--exp-text);
    font-size: 0.813rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--exp-body);
}

.expense-module-actions .module-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--exp-shadow-sm);
    border-color: var(--exp-accent);
    color: var(--exp-accent);
}

/* ===== Dark Slate Hero Header ===== */
.expense-header {
    background: linear-gradient(135deg, var(--exp-hero-from) 0%, var(--exp-hero-to) 100%);
    color: white;
    padding: 0.875rem 1.25rem;
    border-radius: 12px;
    box-shadow: var(--exp-shadow-lg);
    position: relative;
    overflow: hidden;
    margin: 0.875rem 1.25rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: none;
}

.expense-header::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -5%;
    width: 40%;
    height: 180%;
    background: radial-gradient(ellipse at center, rgba(255,255,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.expense-title-section h2,
.expense-title-section h3,
.content-section-title {
    font-family: var(--exp-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: white;
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.expense-subtitle {
    font-size: 0.938rem;
    color: rgba(255, 255, 255, 0.85);
    font-family: var(--exp-body);
    font-weight: 400;
    line-height: 1.5;
    position: relative;
    z-index: 1;
    letter-spacing: 0;
}

.expense-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.action-button,
.expense-actions .module-action-btn {
    padding: 0.5rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 0.813rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--exp-body);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-button:hover,
.expense-actions .module-action-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
    box-shadow: none;
}

/* ===== Controls Bar — Scrollable Pill Tabs ===== */
.expense-controls {
    background: transparent;
    border-radius: 0;
    padding: 0.5rem 0.875rem 0;
    margin: 0;
    box-shadow: none;
    border: none;
    display: flex;
    flex-wrap: nowrap;
    gap: 0.375rem;
    align-items: center;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.expense-controls::-webkit-scrollbar {
    display: none;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.control-label {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    font-weight: 600;
    color: var(--exp-text);
    text-transform: none;
    letter-spacing: 0;
}

.analysis-type-selector {
    display: flex;
    gap: 0.5rem;
    background: transparent;
    border-radius: 0;
    padding: 0;
}

.analysis-type-btn {
    padding: 0.625rem 1.25rem;
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--exp-body);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--exp-text-secondary);
    white-space: nowrap;
}

.analysis-type-btn:hover:not(.active) {
    transform: translateY(-1px);
    border-color: var(--exp-accent);
    color: var(--exp-text);
    box-shadow: var(--exp-shadow-sm);
}

.analysis-type-btn.active {
    background: transparent;
    border-color: transparent;
    color: var(--exp-text);
    font-weight: 600;
    box-shadow: none;
    border-bottom: 2px solid var(--exp-accent, #4a9080);
    border-radius: 0;
}

.view-options {
    display: flex;
    gap: 0.5rem;
}

.view-option {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    background: var(--exp-surface);
    color: var(--exp-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--exp-body);
    white-space: nowrap;
}

.view-option:hover:not(.active) {
    transform: translateY(-1px);
    border-color: var(--exp-accent);
    color: var(--exp-text);
    box-shadow: var(--exp-shadow-sm);
}

.view-option.active {
    background: var(--exp-surface, #fff);
    color: var(--exp-text);
    border-color: var(--exp-accent, #4a9080);
    font-weight: 600;
    box-shadow: var(--exp-shadow-sm);
}

/* Time period select */
.expense-controls select {
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    background: var(--exp-surface);
    font-family: var(--exp-body);
    font-size: 0.813rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--exp-text);
}

.expense-controls select:hover {
    border-color: var(--exp-accent);
}

.expense-controls select:focus {
    outline: none;
    border-color: var(--exp-accent);
    box-shadow: 0 0 0 3px rgba(74, 144, 128, 0.12);
}

/* ===== Visualization Area — Content Container ===== */
.expense-visualization-area {
    background: var(--exp-surface);
    border-radius: 12px;
    margin: 0 0.875rem;
    padding: 0.625rem;
    border: 1px solid var(--exp-border);
    box-shadow: var(--exp-shadow-sm);
    min-height: 240px;
    position: relative;
}

/* ===== View Container (for overview with grid layout) ===== */
.expense-view-container {
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.expense-view-container .expense-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.625rem;
    margin-bottom: 0;
}

.expense-view-container .expense-chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

/* ===== Hero Card — Total Expenses with Breakdown ===== */
.expense-hero {
    background: linear-gradient(135deg, var(--exp-hero-from) 0%, var(--exp-hero-to) 100%);
    color: white;
    padding: 0.875rem;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--exp-shadow-lg);
    margin-bottom: 0;
}

.expense-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -5%;
    width: 40%;
    height: 180%;
    background: radial-gradient(ellipse at center, rgba(255,255,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.expense-hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.expense-hero-main {
    flex: 1;
}

.expense-hero-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    opacity: 0.8;
    margin-bottom: 0.75rem;
}

.expense-hero-value {
    font-family: var(--exp-mono);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.expense-hero-context {
    font-family: var(--exp-body);
    font-size: 1rem;
    opacity: 0.9;
    line-height: 1.5;
    max-width: 600px;
}

.expense-hero-breakdown {
    display: flex;
    gap: 0.875rem;
    align-items: center;
}

.expense-hero-stat {
    text-align: right;
}

.expense-hero-stat-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.7;
    margin-bottom: 0.5rem;
}

.expense-hero-stat-value {
    font-family: var(--exp-mono);
    font-size: 1.15rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.expense-hero-composition {
    width: 160px;
    height: 160px;
    position: relative;
}

/* ===== Metric Cards Grid ===== */
.expense-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.625rem;
}

.metric-card {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 10px;
    padding: 0.5rem 0.625rem;
    border-left: 4px solid var(--exp-border);
    transition: all 0.25s ease;
    position: relative;
    overflow: visible;
    animation: expSlideInUp 0.35s ease both;
}

.metric-card::before {
    display: none;
}

.metric-card.cogs { border-left-color: var(--exp-cogs); }
.metric-card.opex { border-left-color: var(--exp-opex); }
.metric-card.fixed { border-left-color: var(--exp-fixed); }
.metric-card.variable { border-left-color: var(--exp-variable); }

.metric-card:nth-child(1) { animation-delay: 0.05s; }
.metric-card:nth-child(2) { animation-delay: 0.1s; }
.metric-card:nth-child(3) { animation-delay: 0.15s; }
.metric-card:nth-child(4) { animation-delay: 0.2s; }

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

.metric-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.metric-icon.cogs { background: var(--exp-cogs-light); color: var(--exp-cogs); }
.metric-icon.opex { background: var(--exp-opex-light); color: var(--exp-opex); }
.metric-icon.fixed { background: var(--exp-fixed-light); color: var(--exp-fixed); }
.metric-icon.variable { background: var(--exp-variable-light); color: var(--exp-variable); }

.metric-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    color: var(--exp-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.625rem;
}

.metric-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--exp-text);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
    margin-bottom: 0.375rem;
}

.metric-card.cogs .metric-value { color: var(--exp-text); }
.metric-card.opex .metric-value { color: var(--exp-text); }
.metric-card.fixed .metric-value { color: var(--exp-text); }
.metric-card.variable .metric-value { color: var(--exp-text); }

.metric-trend {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-family: var(--exp-mono);
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

.trend-positive { color: var(--exp-profit); }
.trend-negative { color: var(--exp-loss); }
.trend-neutral { color: var(--exp-text-muted); }

/* New-style expense metric cards (used in overview) */
.expense-metric-card {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 10px;
    padding: 0.5rem 0.625rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    box-shadow: var(--exp-shadow-sm);
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
    border-left: 4px solid var(--exp-border);
    animation: expSlideInUp 0.35s ease both;
}

.expense-metric-card::before {
    display: none;
}

.expense-metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--exp-shadow-md);
}

.expense-metric-cogs { border-left-color: var(--exp-cogs); }
.expense-metric-opex { border-left-color: var(--exp-opex); }
.expense-metric-fixed { border-left-color: var(--exp-fixed); }
.expense-metric-variable { border-left-color: var(--exp-variable); }

.expense-metric-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.expense-metric-card:hover .expense-metric-icon {
    transform: scale(1.05);
}

.expense-metric-icon svg {
    width: 24px;
    height: 24px;
    stroke-width: 2.5;
}

.expense-metric-cogs .expense-metric-icon { background: var(--exp-cogs-light); color: var(--exp-cogs); }
.expense-metric-opex .expense-metric-icon { background: var(--exp-opex-light); color: var(--exp-opex); }
.expense-metric-fixed .expense-metric-icon { background: var(--exp-fixed-light); color: var(--exp-fixed); }
.expense-metric-variable .expense-metric-icon { background: var(--exp-variable-light); color: var(--exp-variable); }

.expense-metric-content {
    flex: 1;
    min-width: 0;
}

.expense-metric-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    color: var(--exp-text-muted);
    margin-bottom: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    line-height: 1.2;
}

.expense-metric-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--exp-text);
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    margin-bottom: 0.375rem;
}

.expense-metric-subtitle {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text-secondary);
    font-weight: 500;
    line-height: 1.3;
}

/* ===== Chart Cards ===== */
.expense-chart-card {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
    padding: 0.75rem;
    box-shadow: var(--exp-shadow-sm);
    position: relative;
}

.expense-chart-card-1 { grid-area: chart1; }
.expense-chart-card-2 { grid-area: chart2; }
.expense-chart-card-3 { grid-area: chart3; }
.expense-chart-card-4 { grid-area: chart4; }

.chart-header,
.expense-chart-header,
.visualization-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.625rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--exp-bg);
}

.chart-title,
.expense-chart-title,
.visualization-title {
    font-family: var(--exp-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--exp-text);
    letter-spacing: -0.01em;
}

.chart-subtitle,
.expense-chart-subtitle {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text-muted);
    font-weight: 500;
}

.chart-container,
.expense-chart-canvas {
    height: 280px;
    position: relative;
    width: 100%;
    display: block;
}

.chart-container canvas,
.expense-chart-canvas canvas {
    display: block;
    box-sizing: border-box;
}

/* ===== Key Insight Banner ===== */
.expense-key-insight {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.625rem 0.875rem;
    border-radius: 12px;
    border-left: 6px solid var(--exp-border);
    box-shadow: var(--exp-shadow-md);
    animation: expSlideInUp 0.35s ease both;
}

.expense-key-insight.warning {
    background: linear-gradient(135deg, var(--exp-opex-light) 0%, #FFFBEB 100%);
    border-left-color: var(--exp-opex);
}

.expense-key-insight.danger {
    background: linear-gradient(135deg, var(--exp-cogs-light) 0%, #FFF1F2 100%);
    border-left-color: var(--exp-cogs);
}

.expense-key-insight.success {
    background: linear-gradient(135deg, var(--exp-variable-light) 0%, #ECFDF5 100%);
    border-left-color: var(--exp-variable);
}

.expense-key-insight.info {
    background: linear-gradient(135deg, var(--exp-fixed-light) 0%, #EFF6FF 100%);
    border-left-color: var(--exp-fixed);
}

.expense-insight-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.expense-insight-content {
    flex: 1;
}

.expense-insight-title {
    font-family: var(--exp-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--exp-text);
    margin-bottom: 0.375rem;
    letter-spacing: -0.01em;
}

.expense-insight-text {
    font-family: var(--exp-body);
    font-size: 0.875rem;
    color: var(--exp-text-secondary);
    line-height: 1.6;
}

/* ===== Insights Panel (bottom of module) ===== */
.expense-insights-panel {
    background: var(--exp-bg);
    border-radius: 12px;
    padding: 0.625rem;
    margin: 0 0.875rem 0.75rem;
    border: 1px solid var(--exp-border);
}

.expense-insights-panel .insights-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.625rem;
}

.expense-insights-panel .insights-icon {
    width: 36px;
    height: 36px;
    background: var(--exp-accent-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--exp-accent);
    flex-shrink: 0;
}

.expense-insights-panel .insights-title {
    font-family: var(--exp-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--exp-text);
    margin: 0;
}

.expense-insights-panel .insights-list {
    display: grid;
    gap: 0.45rem;
}

.expense-insights-panel .insight-item {
    background: var(--exp-surface);
    border-radius: 10px;
    padding: 0.75rem 0.875rem;
    display: flex;
    gap: 0.45rem;
    align-items: start;
    transition: all 0.2s ease;
    border: 1px solid var(--exp-border);
    border-left: 4px solid var(--exp-accent);
}

.expense-insights-panel .insight-item:hover {
    transform: translateX(4px);
    box-shadow: var(--exp-shadow-sm);
}

.expense-insights-panel .insight-bullet {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 0.375rem;
    flex-shrink: 0;
    background: var(--exp-accent);
}

.expense-insights-panel .insight-bullet.high {
    background: var(--exp-loss);
}

.expense-insights-panel .insight-bullet.medium {
    background: var(--exp-warning);
}

.expense-insights-panel .insight-bullet.low {
    background: var(--exp-accent);
}

.expense-insights-panel .insight-text {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text);
    line-height: 1.6;
}

/* ===== Detailed View ===== */
.expense-detailed-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.expense-detailed-section {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--exp-shadow-sm);
}

.expense-detailed-header {
    padding: 0.625rem 0.875rem;
    background: var(--exp-bg);
    border-bottom: 2px solid var(--exp-border);
    border-left: 4px solid var(--exp-accent);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.expense-detailed-header-main {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.expense-detailed-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--exp-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--exp-accent);
    border: 1px solid var(--exp-border);
}

.expense-detailed-icon svg {
    width: 22px;
    height: 22px;
}

.expense-detailed-title {
    font-family: var(--exp-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--exp-text);
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.01em;
}

.expense-detailed-subtitle {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text-secondary);
    font-weight: 500;
}

.expense-detailed-header-stats {
    display: flex;
    gap: 0.875rem;
}

.expense-detailed-stat {
    text-align: right;
}

.expense-detailed-stat-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--exp-text);
    margin-bottom: 0.25rem;
    font-variant-numeric: tabular-nums;
}

.expense-detailed-stat-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-text-muted);
}

.expense-detailed-table-wrapper {
    overflow-x: auto;
}

.expense-detailed-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--exp-body);
}

.expense-detailed-table thead {
    background: var(--exp-bg);
    border-bottom: 2px solid var(--exp-border);
}

.expense-detailed-table th {
    padding: 0.625rem 1rem;
    text-align: left;
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-text-muted);
}

.expense-detail-col-rank { width: 50px; text-align: center !important; }
.expense-detail-col-name { width: 35%; }
.expense-detail-col-amount { width: 25%; }
.expense-detail-col-percent { width: 20%; }
.expense-detail-col-split { width: 20%; }

.expense-detail-row {
    border-bottom: 1px solid var(--exp-border-light);
    transition: background 0.2s ease;
}

.expense-detail-row:hover {
    background: var(--exp-bg);
}

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

.expense-detail-rank {
    text-align: center;
    font-family: var(--exp-mono);
    font-weight: 600;
    color: var(--exp-text-muted);
    font-size: 0.813rem;
    padding: 1rem;
}

.expense-detail-name {
    padding: 0.625rem 1rem;
}

.expense-detail-name-text {
    font-family: var(--exp-body);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--exp-text);
    margin-bottom: 0.25rem;
}

.expense-detail-category {
    font-family: var(--exp-body);
    font-size: 0.75rem;
    color: var(--exp-text-secondary);
}

.expense-detail-amount {
    padding: 0.625rem 1rem;
}

.expense-detail-amount-value {
    font-family: var(--exp-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--exp-text);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.expense-detail-amount-bar {
    height: 6px;
    background: var(--exp-bg);
    border-radius: 3px;
    overflow: hidden;
}

.expense-detail-amount-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.expense-detail-percent {
    padding: 0.625rem 1rem;
}

.expense-detail-percent-category {
    font-family: var(--exp-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--exp-text);
    margin-bottom: 0.25rem;
}

.expense-detail-percent-revenue {
    font-family: var(--exp-body);
    font-size: 0.75rem;
    color: var(--exp-text-secondary);
}

.expense-detail-split {
    padding: 0.625rem 1rem;
}

.expense-detail-split-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.expense-detail-split-row:last-child {
    margin-bottom: 0;
}

.expense-detail-split-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    color: var(--exp-text-muted);
    min-width: 16px;
}

.expense-detail-split-value {
    font-family: var(--exp-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--exp-text-secondary);
    font-variant-numeric: tabular-nums;
}

/* ===== Treemap View ===== */
.expense-treemap-container {
    padding: 0;
}

.expense-treemap-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.875rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--exp-bg);
}

.expense-treemap-title-section {
    flex: 1;
}

.expense-treemap-title {
    font-family: var(--exp-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--exp-text);
    margin: 0 0 0.375rem 0;
    letter-spacing: -0.01em;
}

.expense-treemap-subtitle {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text-muted);
    font-weight: 500;
}

.expense-treemap-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.expense-treemap-label {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    font-weight: 600;
    color: var(--exp-text-secondary);
}

.expense-treemap-select {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    background: var(--exp-surface);
    color: var(--exp-text);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.expense-treemap-select:hover { border-color: var(--exp-accent); }

.expense-treemap-select:focus {
    outline: none;
    border-color: var(--exp-accent);
    box-shadow: 0 0 0 3px rgba(74, 144, 128, 0.12);
}

.expense-treemap-stats {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.625rem;
    background: var(--exp-bg);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
}

.expense-treemap-stat {
    flex: 1;
    text-align: center;
}

.expense-treemap-stat-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-text-muted);
    margin-bottom: 0.5rem;
}

.expense-treemap-stat-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--exp-text);
    font-variant-numeric: tabular-nums;
}

.expense-treemap-viz {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 10px;
    padding: 0.625rem;
    min-height: 290px;
}

.expense-treemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.625rem;
    width: 100%;
}

.expense-treemap-box {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-left: 4px solid var(--exp-accent);
    border-radius: 10px;
    padding: 0.875rem;
    box-shadow: var(--exp-shadow-sm);
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.expense-treemap-box:hover {
    transform: translateY(-3px);
    box-shadow: var(--exp-shadow-md);
}

.expense-treemap-box.treemap-box-large { grid-column: span 2; grid-row: span 2; }
.expense-treemap-box.treemap-box-medium { grid-column: span 1; grid-row: span 2; }
.expense-treemap-box.treemap-box-small { grid-column: span 1; grid-row: span 1; }

.expense-treemap-box-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.75rem;
}

.expense-treemap-box-category {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-text-secondary);
}

.expense-treemap-box-percent {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--exp-text);
}

.expense-treemap-box-amount {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    font-variant-numeric: tabular-nums;
    color: var(--exp-text);
}

.expense-treemap-box.treemap-box-large .expense-treemap-box-category { font-size: 0.813rem; }
.expense-treemap-box.treemap-box-large .expense-treemap-box-percent { font-size: 1rem; }
.expense-treemap-box.treemap-box-large .expense-treemap-box-amount { font-size: 1.15rem; }

.expense-treemap-children {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.expense-treemap-child {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.625rem;
    background: var(--exp-bg);
    border-radius: 6px;
    font-size: 0.75rem;
    transition: background 0.2s ease;
    cursor: default;
}

.expense-treemap-child:hover { background: var(--exp-border-light); }

.expense-treemap-child-name {
    color: var(--exp-text-secondary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 0.5rem;
}

.expense-treemap-child-percent {
    font-family: var(--exp-mono);
    font-weight: 600;
    color: var(--exp-text);
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
}

.expense-treemap-child-more {
    font-size: 0.688rem;
    color: var(--exp-text-muted);
    font-style: italic;
    padding: 0.5rem 0.625rem;
    text-align: center;
}

/* ===== Comparison View ===== */
.expense-comparison-container {
    padding: 0;
}

.expense-comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.625rem;
    border-bottom: 2px solid var(--exp-bg);
}

.expense-comparison-title-section { flex: 1; }

.expense-comparison-title {
    font-family: var(--exp-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--exp-text);
    margin: 0 0 0.375rem 0;
    letter-spacing: -0.01em;
}

.expense-comparison-subtitle {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text-muted);
    font-weight: 500;
}

.expense-comparison-summary {
    background: linear-gradient(135deg, var(--exp-hero-from) 0%, var(--exp-hero-to) 100%);
    color: white;
    padding: 0.75rem 0.875rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--exp-shadow-md);
}

.expense-comparison-summary-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.8;
    margin-bottom: 0.375rem;
}

.expense-comparison-summary-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    margin-bottom: 0.25rem;
}

.expense-comparison-summary-value.positive { color: #6EE7B7; }
.expense-comparison-summary-value.negative { color: #FCA5A5; }

.expense-comparison-summary-percent {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.expense-comparison-summary-percent.positive { color: #6EE7B7; }
.expense-comparison-summary-percent.negative { color: #FCA5A5; }

.expense-comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.expense-comparison-card {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-left: 4px solid var(--exp-accent);
    border-radius: 10px;
    padding: 0.875rem;
    box-shadow: var(--exp-shadow-sm);
    transition: all 0.25s ease;
}

.expense-comparison-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--exp-shadow-md);
}

.expense-comparison-card-header {
    margin-bottom: 0.625rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--exp-bg);
}

.expense-comparison-card-category {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-text-secondary);
    margin-bottom: 0.25rem;
}

.expense-comparison-card-full-name {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    color: var(--exp-text-muted);
    font-weight: 500;
}

.expense-comparison-card-values {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.625rem;
}

.expense-comparison-card-value-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.375rem 0;
}

.expense-comparison-card-value-row.current {
    padding: 0.625rem 0.75rem;
    background: var(--exp-bg);
    border-radius: 6px;
}

.expense-comparison-card-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--exp-text-muted);
}

.expense-comparison-card-amount {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--exp-text);
    font-variant-numeric: tabular-nums;
}

.expense-comparison-card-value-row.current .expense-comparison-card-amount {
    font-size: 1.125rem;
}

.expense-comparison-card-change {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    border-radius: 8px;
    font-weight: 600;
}

.expense-comparison-card-change.positive {
    background: var(--exp-profit-light);
    color: var(--exp-profit);
}

.expense-comparison-card-change.negative {
    background: var(--exp-loss-light);
    color: var(--exp-loss);
}

.expense-comparison-card-change-icon {
    font-size: 1.125rem;
    font-weight: 700;
}

.expense-comparison-card-change-amount {
    font-family: var(--exp-mono);
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
}

.expense-comparison-card-change-percent {
    font-family: var(--exp-mono);
    font-size: 0.813rem;
    opacity: 0.8;
    font-variant-numeric: tabular-nums;
}

.expense-comparison-chart-section {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
    padding: 0.75rem;
    box-shadow: var(--exp-shadow-sm);
}

.expense-comparison-chart-title {
    font-family: var(--exp-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--exp-text);
    margin: 0 0 0.625rem 0;
    letter-spacing: -0.01em;
}

.expense-comparison-chart-container {
    height: 260px;
    position: relative;
}

/* ===== Interactive Feature: Metric Card Drill-Down ===== */
.metric-card[data-drilldown],
.expense-metric-card[data-drilldown] {
    cursor: pointer;
    position: relative;
}

.metric-card[data-drilldown]::after,
.expense-metric-card[data-drilldown]::after {
    content: '';
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23A8A29E' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: contain;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.metric-card[data-drilldown]:hover::after,
.expense-metric-card[data-drilldown]:hover::after {
    opacity: 1;
    transform: translateX(2px);
}

.metric-card[data-drilldown]:hover,
.expense-metric-card[data-drilldown]:hover {
    border-color: var(--exp-accent);
}

/* ===== Interactive Feature: RiQ Explain Buttons ===== */
.riq-explain-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3rem 0.75rem;
    background: transparent;
    border: 1.5px solid var(--exp-accent);
    border-radius: 2rem;
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    color: var(--exp-accent);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.riq-explain-btn:hover {
    background: var(--exp-accent);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(74, 144, 128, 0.25);
}

.riq-explain-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.riq-explain-btn .riq-spinner {
    width: 12px;
    height: 12px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: expRiqSpin 0.6s linear infinite;
}

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

.riq-explanation-card {
    background: linear-gradient(135deg, var(--liq-bg) 0%, var(--liq-border-lighter) 100%);
    border: 1px solid var(--exp-border);
    border-left: 4px solid var(--exp-accent);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-top: 0.75rem;
    position: relative;
    animation: expSlideDown 0.3s ease;
}

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

.riq-explanation-card .riq-text {
    font-family: var(--exp-body);
    font-size: 0.875rem;
    color: var(--exp-text);
    line-height: 1.65;
}

.riq-explanation-card .riq-dismiss {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--exp-text-muted);
    cursor: pointer;
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.15s ease;
}

.riq-explanation-card .riq-dismiss:hover {
    background: var(--exp-border);
    color: var(--exp-text);
}

.riq-explanation-card .riq-label {
    font-family: var(--exp-body);
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--exp-accent);
    margin-bottom: 0.375rem;
}

/* ===== Interactive Feature: Expense Alerts ===== */
.expense-alerts-container {
    margin: 0 2rem 0.75rem;
}

.expense-alert-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    border-radius: 10px;
    border-left: 4px solid var(--exp-border);
    margin-bottom: 0.5rem;
    animation: expSlideInUp 0.3s ease;
    font-family: var(--exp-body);
}

.expense-alert-banner.alert-critical {
    background: var(--exp-loss-light);
    border-left-color: var(--exp-loss);
    color: var(--exp-loss);
}

.expense-alert-banner.alert-warning {
    background: var(--exp-warning-light);
    border-left-color: var(--exp-warning);
    color: #92400E;
}

.expense-alert-banner.alert-success {
    background: var(--exp-profit-light);
    border-left-color: var(--exp-profit);
    color: var(--exp-profit);
}

.expense-alert-banner .alert-icon { flex-shrink: 0; font-size: 1.125rem; }
.expense-alert-banner .alert-message { flex: 1; font-size: 0.813rem; font-weight: 500; }

.expense-alert-banner .alert-dismiss {
    background: none;
    border: none;
    color: inherit;
    opacity: 0.5;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem;
    transition: opacity 0.15s ease;
}

.expense-alert-banner .alert-dismiss:hover { opacity: 1; }

/* ===== Interactive Feature: Expense Alert Builder ===== */
.expense-alert-builder {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
    margin-top: 1rem;
    overflow: hidden;
}

.alert-builder-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--exp-border);
    transition: background 0.15s ease;
}

.alert-builder-header:hover {
    background: var(--exp-accent-light);
}

.alert-builder-title {
    margin: 0;
    font-family: var(--exp-body);
    font-size: 0.813rem;
    font-weight: 700;
    color: var(--exp-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.alert-builder-toggle {
    font-family: var(--exp-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--exp-accent);
}

.alert-builder-body {
    padding: 1rem 1.25rem;
}

.alert-rule-form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.alert-rule-form select,
.alert-rule-form input {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    background: var(--exp-bg);
    color: var(--exp-text);
    outline: none;
}

.alert-rule-form select:focus,
.alert-rule-form input:focus {
    border-color: var(--exp-accent);
    box-shadow: 0 0 0 3px rgba(74, 144, 128, 0.12);
}

.alert-threshold-wrap {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.alert-threshold-input {
    width: 70px;
}

.alert-threshold-suffix {
    font-family: var(--exp-mono);
    font-size: 0.813rem;
    color: var(--exp-text-muted);
}

.alert-add-btn {
    background: var(--exp-accent);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-family: var(--exp-body);
    font-size: 0.813rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.alert-add-btn:hover {
    background: #3d7a6a;
    transform: translateY(-1px);
}

.alert-rules-list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.alert-rule-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    background: var(--exp-bg);
    border-radius: 8px;
    border-left: 3px solid var(--exp-accent);
}

.alert-rule-text {
    font-family: var(--exp-body);
    font-size: 0.813rem;
    color: var(--exp-text);
}

.alert-rule-delete {
    background: none;
    border: none;
    color: var(--exp-text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem;
    opacity: 0.6;
    transition: all 0.15s ease;
}

.alert-rule-delete:hover {
    opacity: 1;
    color: var(--exp-loss);
}

.expense-alert-banners-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0.75rem 0;
}

/* ===== Interactive Feature: Expense Reduction Calculator ===== */
.expense-reduction-calculator {
    background: var(--exp-surface);
    border: 1px solid var(--exp-border);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 0.875rem;
}

.expense-reduction-header {
    background: linear-gradient(135deg, var(--exp-hero-from) 0%, var(--exp-hero-to) 100%);
    color: white;
    padding: 0.75rem 0.875rem;
}

.expense-reduction-header h4 {
    margin: 0 0 0.25rem 0;
    font-family: var(--exp-display);
    font-size: 1.125rem;
    font-weight: 600;
}

.expense-reduction-header p {
    margin: 0;
    font-family: var(--exp-body);
    font-size: 0.75rem;
    opacity: 0.85;
}

.expense-reduction-body {
    padding: 0.625rem;
}

.expense-slider-group {
    margin-bottom: 0.75rem;
}

.expense-slider-group .slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.expense-slider-group .slider-label {
    font-family: var(--exp-body);
    font-weight: 600;
    color: var(--exp-text);
    font-size: 0.813rem;
}

.expense-slider-group .slider-value {
    font-family: var(--exp-mono);
    font-weight: 700;
    color: var(--exp-accent);
    font-size: 0.875rem;
}

.expense-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--exp-border);
    border-radius: 3px;
    outline: none;
}

.expense-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--exp-surface);
    border: 3px solid var(--exp-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    transition: all 0.2s ease;
}

.expense-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 3px 10px rgba(74, 144, 128, 0.35);
}

.expense-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--exp-surface);
    border: 3px solid var(--exp-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.expense-result-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.45rem;
    margin-top: 0.625rem;
}

.expense-result-card {
    background: var(--exp-bg);
    border-radius: 10px;
    padding: 0.75rem;
    border-left: 3px solid var(--exp-accent);
    text-align: center;
}

.expense-result-card .result-label {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--exp-text-muted);
    margin-bottom: 0.375rem;
}

.expense-result-card .result-value {
    font-family: var(--exp-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--exp-text);
}

.expense-result-card .result-delta {
    font-family: var(--exp-mono);
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

.expense-result-card .result-delta.positive { color: var(--exp-profit); }
.expense-result-card .result-delta.negative { color: var(--exp-loss); }

.expense-result-card:nth-child(1) { border-left-color: var(--exp-accent); }
.expense-result-card:nth-child(2) { border-left-color: var(--exp-loss); }
.expense-result-card:nth-child(3) { border-left-color: var(--exp-profit); }
.expense-result-card:nth-child(4) { border-left-color: var(--exp-fixed); }
.expense-result-card:nth-child(5) { border-left-color: var(--exp-warning); }
.expense-result-card:nth-child(6) { border-left-color: var(--exp-variable); }

/* ===== Interactive Feature: Expense Pressure Heatmap ===== */
.expense-pressure-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
    padding: 1rem 0;
}

.expense-cell {
    border-radius: 10px;
    padding: 0.625rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.expense-cell:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    z-index: 5;
}

.expense-cell .expense-name {
    font-family: var(--exp-body);
    font-size: 0.688rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    line-height: 1.3;
    word-break: break-word;
}

.expense-cell .expense-amount {
    font-family: var(--exp-mono);
    font-size: 0.813rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    margin-top: 0.375rem;
}

.expense-cell .expense-change {
    font-family: var(--exp-mono);
    font-size: 0.625rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 0.25rem;
}

/* ===== Animations ===== */
@keyframes expSlideInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes expFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== Loading State ===== */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    gap: 0.375rem;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--exp-border);
    border-top-color: var(--exp-accent);
    border-radius: 50%;
    animation: expRiqSpin 0.8s linear infinite;
}

.loading-text {
    font-family: var(--exp-body);
    font-size: 0.875rem;
    color: var(--exp-text-muted);
}

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

/* Desktop: 2-column layout */
@media (min-width: 1025px) {
    .expense-view-container {
        grid-template-columns: 1fr 1fr;
        grid-template-areas:
            "hero hero"
            "metrics metrics"
            "chart1 chart2"
            "chart3 chart4"
            "insight insight";
    }

    .expense-metrics-grid {
        grid-template-columns: repeat(4, 1fr) !important;
    }

    .expense-hero-content {
        flex-direction: row !important;
        align-items: center !important;
    }

    .expense-key-insight {
        flex-direction: row !important;
        align-items: center !important;
    }
}

/* 1200px breakpoint */
@media (max-width: 1200px) {
    .expense-metrics-grid,
    .expense-view-container .expense-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .expense-view-container .expense-chart-grid {
        grid-template-columns: 1fr;
    }

    .expense-comparison-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .expense-result-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .expense-pressure-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

/* 1024px — single column */
@media (max-width: 1024px) {
    .expense-view-container {
        grid-template-columns: 1fr;
        grid-template-areas:
            "hero"
            "metrics"
            "chart1"
            "chart2"
            "chart3"
            "chart4"
            "insight";
    }

    .expense-hero-content {
        flex-direction: column;
        gap: 0.875rem;
        align-items: flex-start;
    }

    .expense-hero-composition {
        align-self: center;
        width: 140px;
        height: 140px;
    }

    .expense-treemap-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    .expense-treemap-box.treemap-box-large,
    .expense-treemap-box.treemap-box-medium {
        grid-column: span 1;
        grid-row: span 1;
    }
}

/* 768px — tablet */
@media (max-width: 768px) {
    .expense-header {
        padding: 0.875rem;
        margin: 0.625rem;
        border-radius: 12px;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.625rem;
    }

    .expense-title-section h2,
    .expense-title-section h3,
    .content-section-title {
        font-size: 1.15rem;
    }

    .expense-visualization-area {
        margin: 0 0.625rem;
        padding: 0.625rem;
    }

    .expense-controls {
        padding: 0.75rem 1rem 0;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .analysis-type-btn,
    .view-option {
        padding: 0.5rem 0.875rem;
        font-size: 0.75rem;
    }

    .expense-metrics-grid,
    .expense-view-container .expense-metrics-grid {
        grid-template-columns: 1fr;
    }

    .expense-hero {
        padding: 1.25rem;
    }

    .expense-hero-value {
        font-size: 1.5rem;
    }

    .expense-hero-composition {
        width: 120px;
        height: 120px;
    }

    .expense-chart-card {
        padding: 1.25rem;
    }

    .chart-container,
    .expense-chart-canvas {
        height: 240px;
    }

    .expense-key-insight {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.75rem;
        gap: 0.5rem;
    }

    .expense-insights-panel {
        margin: 0 1rem 1rem;
    }

    .expense-comparison-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .expense-comparison-summary { width: 100%; }

    .expense-comparison-grid { grid-template-columns: 1fr; }

    .expense-comparison-chart-container { height: 280px; }

    .expense-treemap-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .expense-treemap-stats {
        flex-direction: column;
        gap: 0.75rem;
    }

    .expense-treemap-grid { grid-template-columns: 1fr; }

    .expense-treemap-box.treemap-box-large,
    .expense-treemap-box.treemap-box-medium,
    .expense-treemap-box.treemap-box-small {
        grid-column: span 1;
        grid-row: span 1;
    }

    .expense-result-cards {
        grid-template-columns: 1fr;
    }

    .expense-pressure-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .expense-alerts-container {
        margin: 0 1rem 0.5rem;
    }

    .expense-detailed-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .expense-detailed-header-stats {
        width: 100%;
        justify-content: flex-start;
        gap: 1.25rem;
    }

    .expense-detailed-stat { text-align: left; }
}

/* 480px — mobile */
@media (max-width: 480px) {
    .expense-header {
        padding: 1.25rem;
        margin: 0.75rem;
    }

    .expense-title-section h2,
    .expense-title-section h3,
    .content-section-title {
        font-size: 1.375rem;
    }

    .expense-hero {
        padding: 0.875rem;
    }

    .expense-hero-value {
        font-size: 1.25rem;
    }

    .expense-hero-composition {
        width: 100px;
        height: 100px;
    }

    .expense-chart-card {
        padding: 1rem;
    }

    .chart-container,
    .expense-chart-canvas {
        height: 200px;
    }

    .chart-title,
    .expense-chart-title,
    .visualization-title {
        font-size: 1rem;
    }

    .metric-value {
        font-size: 1.375rem;
    }

    .expense-metric-value {
        font-size: 1.375rem;
    }

    .expense-key-insight {
        padding: 1rem;
        border-left-width: 4px;
    }
}

/* ===== Print Styles ===== */
@media print {
    .expense-header .expense-actions,
    .expense-module-actions,
    .expense-controls,
    .action-button,
    .module-action-btn,
    .riq-explain-btn,
    .riq-explanation-card,
    .expense-alerts-container,
    .expense-reduction-calculator {
        display: none !important;
    }

    .expense-structure-container {
        background: white;
    }

    .expense-visualization-area {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .metric-card,
    .expense-metric-card,
    .expense-chart-card,
    .expense-key-insight {
        border: 1px solid var(--liq-border);
        page-break-inside: avoid;
        break-inside: avoid;
    }
}

/* ===== Accessibility ===== */
.action-button:focus,
.module-action-btn:focus,
.analysis-type-btn:focus,
.view-option:focus {
    outline: 2px solid var(--exp-accent);
    outline-offset: 2px;
}