/* FinChronicle — Category Pie Chart (v1.0)
 *
 * Pure CSS conic-gradient donut. The JS render function (js/chart.js) sets
 * background-image only, leaving background-color intact so transparent gaps
 * between segments always show the surface token — light or dark mode.
 *
 * New tokens to append to css/tokens.css :root:
 *   --chart-c1..c8  (see bottom of this file for the block to copy)
 * =========================================================================== */

/* === Layout ================================================================ */

.category-chart {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--space-2xl);
    align-items: center;
    padding: var(--space-xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-xl);
}

/* Empty state spans both columns */
.category-chart:has(.chart-empty) {
    grid-template-columns: 1fr;
}

/* === Donut wrapper ========================================================= */

.chart-donut-wrapper {
    position: relative;
    width: 180px;
    height: 180px;
    flex-shrink: 0;
    margin: auto;
}

/* Outer compass tick ring — 12 marks via repeating-conic + mask */
.chart-donut-wrapper::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    background: repeating-conic-gradient(
        from 0deg,
        transparent 0deg 28deg,
        var(--color-border) 28deg 30deg
    );
    -webkit-mask-image: radial-gradient(
        farthest-side,
        transparent calc(100% - 7px),
        #000 calc(100% - 7px)
    );
    mask-image: radial-gradient(
        farthest-side,
        transparent calc(100% - 7px),
        #000 calc(100% - 7px)
    );
    opacity: 0;
    animation: tick-appear 0.35s 0.55s ease forwards;
    pointer-events: none;
}

@keyframes tick-appear {
    to { opacity: 0.45; }
}

/* === Donut ring ============================================================ */

.chart-donut {
    position: absolute;
    inset: 0;
    border-radius: 50%;

    /* background-color shows through transparent gaps — adapts via dark-mode token */
    background-color: var(--color-surface);
    transition: background-color var(--transition-fast);

    /* background-image is set by JS: donut.style.backgroundImage = conic-gradient(...) */

    /* Start from 12 o'clock */
    transform: rotate(-90deg);
    animation: donut-bloom 0.6s cubic-bezier(0.34, 1.4, 0.64, 1) both;
}

@keyframes donut-bloom {
    from {
        transform: rotate(-90deg) scale(0.8);
        opacity: 0;
        filter: blur(1px);
    }
    to {
        transform: rotate(-90deg) scale(1);
        opacity: 1;
        filter: blur(0);
    }
}

/* Donut hole — surface-coloured circle punched through the centre */
.chart-donut::after {
    content: '';
    position: absolute;
    inset: 28%;
    border-radius: 50%;
    background: var(--color-surface);
    transition: background var(--transition-fast);
    z-index: 1;
}

/* === Centre display ======================================================== */

.chart-center-info {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
    pointer-events: none;
    /* constrain text to the visible hole (~80px) */
    padding: 32%;
    box-sizing: border-box;
}

.chart-center-amount {
    font-size: var(--font-md);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.3px;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    text-align: center;
    white-space: nowrap;
    transition: color var(--transition-fast);
    animation: center-appear 0.3s 0.6s ease both;
}

.chart-center-label {
    font-size: 9px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-top: 3px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    transition: color var(--transition-fast);
    animation: center-appear 0.3s 0.7s ease both;
}

@keyframes center-appear {
    from { opacity: 0; transform: scale(0.85); }
    to   { opacity: 1; transform: scale(1); }
}

/* === Legend ================================================================ */

.chart-legend {
    display: flex;
    flex-direction: column;
    gap: 1px;
    max-height: 256px;
    overflow-y: auto;
    /* subtle scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.chart-legend::-webkit-scrollbar        { width: 3px; }
.chart-legend::-webkit-scrollbar-thumb  { background: var(--color-border); border-radius: 2px; }
.chart-legend::-webkit-scrollbar-track  { background: transparent; }

/* Dim all siblings while any one row is hovered */
.chart-legend:has(.legend-item:hover) .legend-item:not(:hover) {
    opacity: 0.22;
}

.legend-item {
    display: grid;
    grid-template-columns: 8px 1fr auto auto;
    align-items: center;
    gap: var(--space-sm);
    /* bottom padding leaves room for the micro-bar */
    padding: 5px var(--space-sm) 10px var(--space-sm);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
    cursor: default;
    transition:
        opacity    var(--transition-fast),
        background var(--transition-fast);
    /* staggered entrance — delay set by JS via --legend-delay */
    animation: legend-enter 0.35s ease both;
    animation-delay: var(--legend-delay, 0s);
}

@keyframes legend-enter {
    from { opacity: 0; transform: translateX(-7px); }
    to   { opacity: 1; transform: translateX(0); }
}

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

/* Coloured swatch */
.legend-swatch {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    background: var(--item-color, var(--color-text-muted));
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.legend-item:hover .legend-swatch {
    transform: scale(1.55);
}

/* Category name */
.legend-name {
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

/* Percentage — uses text color for WCAG AA contrast (swatch encodes the category color) */
.legend-pct {
    font-size: var(--font-sm);
    font-weight: 700;
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
    text-align: right;
    white-space: nowrap;
}

/* Amount */
.legend-amt {
    font-size: var(--font-sm);
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
    text-align: right;
    white-space: nowrap;
    min-width: 52px;
}

/* Micro progress bar — pinned to bottom of each row */
.legend-bar {
    position: absolute;
    bottom: 2px;
    left: var(--space-sm);
    right: var(--space-sm);
    height: 1.5px;
    background: var(--color-border);
    border-radius: 1px;
    overflow: hidden;
}

.legend-bar-fill {
    height: 100%;
    width: var(--item-pct, 0%);
    background: var(--item-color, var(--color-text-muted));
    border-radius: 1px;
    transform-origin: left;
    transform: scaleX(0);
    /* delay = legend-delay + 0.25s so bars arrive after rows */
    animation: bar-grow 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    animation-delay: calc(var(--legend-delay, 0s) + 0.25s);
}

@keyframes bar-grow {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

/* === Empty / no-data state ================================================= */

.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-xl);
    color: var(--color-text-muted);
    gap: var(--space-sm);
    font-size: var(--font-md);
    width: 100%;
}

.chart-empty i {
    font-size: 36px;
    opacity: 0.2;
    display: block;
}

/* === Section header (optional title above chart) =========================== */

.chart-section-title {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: var(--space-md);
}

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

@media (max-width: 480px) {
    .category-chart {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        padding: var(--space-lg);
    }

    .chart-donut-wrapper {
        width: 160px;
        height: 160px;
    }

    .chart-legend {
        max-height: 200px;
    }
}

/* =============================================================================
 * TOKENS TO ADD TO css/tokens.css  (inside the :root { } block)
 * ---------------------------------------------------------------------------
 *   --chart-c1: #FF9F0A;   amber   — Food
 *   --chart-c2: #FF6B35;   coral   — Groceries / Housing
 *   --chart-c3: #0051D5;   blue    — Transport (matches --color-primary)
 *   --chart-c4: #5AC8FA;   sky     — Utilities / Bills
 *   --chart-c5: #BF5AF2;   purple  — Personal / Shopping
 *   --chart-c6: #FF3B30;   red     — Healthcare (matches --color-danger)
 *   --chart-c7: #34C759;   green   — Savings (matches --color-success)
 *   --chart-c8: #8E8E93;   slate   — Misc / Other
 * ============================================================================= */


/* =============================================================================
 * v3.12.0 — Reports: range selector, bar chart, weekly chart, day heatmap
 * ============================================================================= */

/* === Shared card shell for new charts ====================================== */

.bar-chart-card,
.weekly-chart-card,
.day-heatmap-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

/* === Chart date range selector ============================================= */

.chart-range-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.chart-range-label {
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.range-pills {
    display: flex;
    gap: 4px;
}

.range-date-span {
    margin-left: auto;
    font-size: var(--font-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
    align-self: center;
    font-variant-numeric: tabular-nums;
}

.range-pill {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    padding: 4px 12px;
    cursor: pointer;
    transition:
        color var(--transition-fast),
        background var(--transition-fast),
        border-color var(--transition-fast);
    line-height: 1.4;
}

.range-pill:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.range-pill.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-on-primary);
}

/* === Small empty state (for new charts) ==================================== */

.chart-empty-sm {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-2xl) var(--space-xl);
    color: var(--color-text-muted);
    font-size: var(--font-sm);
}

.chart-empty-sm i {
    font-size: 20px;
    opacity: 0.35;
    flex-shrink: 0;
}

/* === Income vs Expenses bar chart ========================================= */

.bar-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.bar-cols {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
    height: 120px;
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.bar-cols::-webkit-scrollbar       { height: 3px; }
.bar-cols::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }
.bar-cols::-webkit-scrollbar-track { background: transparent; }

.bar-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    flex: 1;
    min-width: 36px;
    animation: col-enter 0.35s ease both;
    animation-delay: var(--bar-delay, 0s);
}

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

.bar-group {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 100px;
    width: 100%;
    justify-content: center;
}

.bar {
    flex: 1;
    max-width: 14px;
    min-height: 2px;
    height: var(--bar-h, 0%);
    border-radius: 3px 3px 0 0;
    transform-origin: bottom;
    animation: bar-rise 0.55s cubic-bezier(0.34, 1.3, 0.64, 1) both;
    animation-delay: var(--bar-delay, 0s);
}

@keyframes bar-rise {
    from { transform: scaleY(0); }
    to   { transform: scaleY(1); }
}

.bar.income-bar  { background: var(--color-success); }
.bar.expense-bar { background: var(--color-danger); }

.bar-month-label {
    font-size: 10px;
    color: var(--color-text-muted);
    white-space: nowrap;
    text-align: center;
}

.bar-net-label {
    font-size: 9px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    text-align: center;
    letter-spacing: -0.2px;
}

/* -strong variants are dark enough for WCAG AA on light bg (≥4.5:1)
   dark-mode.css remaps them to bright values that pass on dark surfaces */
.bar-net-label.positive { color: var(--color-success-strong); }
.bar-net-label.negative { color: var(--color-danger-strong); }

.bar-chart-legend {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    font-size: var(--font-sm);
    color: var(--color-text-muted);
}

.bar-legend-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    margin-right: 4px;
    vertical-align: middle;
}

.bar-legend-dot.income-dot  { background: var(--color-success); }
.bar-legend-dot.expense-dot { background: var(--color-danger); }

/* === Weekly spending chart ================================================= */

.weekly-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.week-row {
    display: grid;
    grid-template-columns: 90px 1fr auto auto;
    align-items: center;
    gap: var(--space-md);
    animation: legend-enter 0.35s ease both;
    animation-delay: var(--week-delay, 0s);
}

.week-label {
    font-size: var(--font-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
}

.week-bar-track {
    height: 6px;
    background: var(--color-bg);
    border-radius: 3px;
    overflow: hidden;
}

.week-bar-fill {
    height: 100%;
    width: var(--week-w, 0%);
    background: var(--color-primary);
    border-radius: 3px;
    transform-origin: left;
    transform: scaleX(0);
    animation: bar-grow 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    animation-delay: calc(var(--week-delay, 0s) + 0.15s);
}

.week-amount {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    min-width: 52px;
    text-align: right;
}

.week-trend {
    font-size: 11px;
    font-weight: 600;
    min-width: 40px;
    text-align: right;
    white-space: nowrap;
}

.week-trend.up   { color: var(--color-danger-strong); }
.week-trend.down { color: var(--color-success-strong); }
.week-trend.same { color: var(--color-text-muted); }

/* === Day-of-month heatmap ================================================== */

/*
 * Cell intensity: rgba of the danger colour, scaled by --cell-intensity.
 * Light: rgb 255, 59, 48 (--color-danger)
 * Dark:  rgb 255, 80, 68  (override via dark-mode.css token --chart-heat)
 */
.day-heatmap {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.heatmap-cell {
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: default;
    transition: transform var(--transition-fast);
    border: 1px solid var(--color-border);
}

.heatmap-cell.active {
    background: rgba(var(--chart-heat), calc(0.15 + var(--cell-intensity, 0) * 0.80));
    border-color: transparent;
}

.heatmap-cell:hover {
    transform: scale(1.15);
    z-index: 1;
    position: relative;
}

.heatmap-day {
    font-size: 10px;
    font-weight: 500;
    color: var(--color-text-muted);
    pointer-events: none;
    line-height: 1;
}

.heatmap-cell.active .heatmap-day {
    color: var(--color-text);
}

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 11px;
    color: var(--color-text-muted);
    justify-content: flex-end;
}

.heatmap-legend-scale {
    width: 64px;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(
        to right,
        rgba(var(--chart-heat), 0.12),
        rgba(var(--chart-heat), 0.90)
    );
}

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

@media (max-width: 400px) {
    .range-date-span {
        display: none;
    }
}

@media (max-width: 480px) {
    .bar-chart-card,
    .weekly-chart-card,
    .day-heatmap-card {
        padding: var(--space-lg);
    }

    .bar-cols {
        height: 100px;
        gap: var(--space-xs);
    }

    .bar-group {
        height: 80px;
    }

    .week-row {
        grid-template-columns: 76px 1fr auto auto;
        gap: var(--space-sm);
    }

    .heatmap-grid {
        grid-template-columns: repeat(7, 1fr);
        gap: 3px;
    }

    .heatmap-cell {
        height: 28px;
    }
}