/* ═══════════════════════════════════════════════════════════════════════════
 * Kallisto Design System — Charts & Data Visualization
 * Line, bar, donut, sparkline, area, heatmap, compare, trend components.
 * Pure CSS + inline SVG — no external charting libraries.
 *
 * Layer order:  tokens.css → components.css → smart-tiles.css → THIS FILE
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── Chart Tokens ─────────────────────────────────────────────────────────── */
:root {
  --chart-1: var(--violet);
  --chart-2: var(--sky);
  --chart-3: var(--mint);
  --chart-4: var(--warn);
  --chart-5: var(--ok);
  --chart-6: var(--bad);
  --chart-grid: var(--line);
  --chart-label: var(--ink-3);
  --chart-draw-speed: 1.2s;
  --chart-bar-speed: 0.6s;
  --chart-dot-size: 4px;
  --chart-container-bg: var(--glass-bg);
  --chart-container-border: var(--glass-stroke-2);
  --chart-container-shadow: var(--shadow-sm);
  --chart-container-radius: var(--r-lg);
  --heatmap-min-l: 0.94;
  --heatmap-min-c: 0.02;
  --heatmap-max-l: 0.55;
  --heatmap-max-c: 0.18;
  --heatmap-h: 295;
}

/* ── Shared Chart Container ───────────────────────────────────────────────── */
.kal-chart {
  position: relative;
  width: 100%;
  border-radius: var(--chart-container-radius);
  background: var(--chart-container-bg);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid var(--chart-container-border);
  box-shadow: inset 0 1px 0 var(--glass-stroke), var(--chart-container-shadow);
  padding: 16px;
  overflow: hidden;
  transition: box-shadow var(--motion-fast) var(--ease-standard),
              transform var(--motion-fast) var(--ease-standard);
}
.kal-chart:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 var(--glass-stroke), var(--shadow-md);
}
.kal-chart__title {
  font-size: 11px; font-family: var(--font-mono);
  letter-spacing: var(--ls-wide); text-transform: uppercase;
  color: var(--chart-label); margin-bottom: 12px;
}
.kal-chart svg {
  display: block; width: 100%; height: auto;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 1. LINE CHART
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-chart-line { position: relative; width: 100%; }
.kal-chart-line svg { display: block; width: 100%; height: auto; }

.kal-chart-line__grid {
  stroke: var(--chart-grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.kal-chart-line__path {
  fill: none;
  stroke: var(--chart-1);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  transition: stroke-dashoffset var(--chart-draw-speed) var(--ease-decelerate);
}
.kal-chart-line__area {
  opacity: 0.18;
  transition: opacity var(--motion-base) var(--ease-standard);
}
.kal-chart-line__dot {
  fill: var(--chart-1);
  stroke: var(--bg-1);
  stroke-width: 2;
  r: var(--chart-dot-size);
  vector-effect: non-scaling-stroke;
  opacity: 0;
  transition: opacity var(--motion-fast), r var(--motion-fast);
}
.kal-chart-line:hover .kal-chart-line__dot { opacity: 1; }
.kal-chart-line__dot:hover { r: 6px; }

.kal-chart-line__label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--chart-label);
  letter-spacing: 0.04em;
  text-anchor: middle;
}
.kal-chart-line__y-label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--chart-label);
  letter-spacing: 0.04em;
  text-anchor: end;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 2. BAR CHART
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-chart-bar { position: relative; width: 100%; }
.kal-chart-bar svg { display: block; width: 100%; height: auto; }

.kal-chart-bar__grid {
  stroke: var(--chart-grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.kal-chart-bar__bar {
  fill: var(--chart-1);
  rx: 3;
  transition: opacity var(--motion-fast);
}
.kal-chart-bar__bar:hover { opacity: 0.82; }
.kal-chart-bar__bar--s2 { fill: var(--chart-2); }
.kal-chart-bar__bar--s3 { fill: var(--chart-3); }
.kal-chart-bar__bar--s4 { fill: var(--chart-4); }
.kal-chart-bar__bar--s5 { fill: var(--chart-5); }
.kal-chart-bar__bar--s6 { fill: var(--chart-6); }

.kal-chart-bar--animate .kal-chart-bar__bar {
  animation: kal-bar-grow var(--chart-bar-speed) var(--ease-decelerate) both;
  animation-delay: calc(var(--i, 0) * 60ms);
}
.kal-chart-bar__label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--chart-label);
  letter-spacing: 0.04em;
  text-anchor: middle;
}
.kal-chart-bar__val {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--ink-2);
  text-anchor: middle;
  font-weight: var(--fw-bold);
}

/* Horizontal variant */
.kal-chart-bar--horizontal .kal-chart-bar__bar {
  rx: 3;
}
.kal-chart-bar--horizontal.kal-chart-bar--animate .kal-chart-bar__bar {
  animation-name: kal-bar-grow-x;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 3. DONUT / RING CHART
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-chart-donut {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.kal-chart-donut__ring { position: relative; }
.kal-chart-donut__ring svg { display: block; }

.kal-chart-donut__track {
  fill: none;
  stroke: var(--chart-grid);
  vector-effect: non-scaling-stroke;
}
.kal-chart-donut__seg {
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.8s var(--ease-decelerate),
              opacity var(--motion-fast);
}
.kal-chart-donut__seg:hover { opacity: 0.78; }
.kal-chart-donut__seg--s1 { stroke: var(--chart-1); }
.kal-chart-donut__seg--s2 { stroke: var(--chart-2); }
.kal-chart-donut__seg--s3 { stroke: var(--chart-3); }
.kal-chart-donut__seg--s4 { stroke: var(--chart-4); }
.kal-chart-donut__seg--s5 { stroke: var(--chart-5); }
.kal-chart-donut__seg--s6 { stroke: var(--chart-6); }

.kal-chart-donut__center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; gap: 2px;
  pointer-events: none;
}
.kal-chart-donut__center-val {
  font-size: 22px; font-weight: var(--fw-bold);
  color: var(--ink); letter-spacing: -0.02em; line-height: 1;
}
.kal-chart-donut__center-label {
  font-size: 10px; font-family: var(--font-mono);
  letter-spacing: var(--ls-wide); text-transform: uppercase;
  color: var(--chart-label);
}

.kal-chart-donut__legend {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.kal-chart-donut__legend-item {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--ink-2);
}
.kal-chart-donut__legend-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 4. SPARKLINE
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-sparkline {
  display: inline-block; vertical-align: middle;
}
.kal-sparkline svg { display: block; }
.kal-sparkline__line {
  fill: none;
  stroke: var(--ink-3);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.kal-sparkline--up .kal-sparkline__line { stroke: var(--ok); }
.kal-sparkline--down .kal-sparkline__line { stroke: var(--bad); }
.kal-sparkline--flat .kal-sparkline__line { stroke: var(--ink-3); }

.kal-sparkline__area {
  opacity: 0.12;
}
.kal-sparkline--up .kal-sparkline__area { fill: var(--ok); }
.kal-sparkline--down .kal-sparkline__area { fill: var(--bad); }
.kal-sparkline--flat .kal-sparkline__area { fill: var(--ink-3); }

/* ═══════════════════════════════════════════════════════════════════════════
 * 5. AREA CHART
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-chart-area { position: relative; width: 100%; }
.kal-chart-area svg { display: block; width: 100%; height: auto; }

.kal-chart-area__grid {
  stroke: var(--chart-grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.kal-chart-area__fill {
  opacity: 0.22;
  transition: opacity var(--motion-base) var(--ease-standard);
}
.kal-chart-area__fill--s1 { fill: var(--chart-1); }
.kal-chart-area__fill--s2 { fill: var(--chart-2); }
.kal-chart-area__fill--s3 { fill: var(--chart-3); }

.kal-chart-area__stroke {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  transition: stroke-dashoffset var(--chart-draw-speed) var(--ease-decelerate);
}
.kal-chart-area__stroke--s1 { stroke: var(--chart-1); }
.kal-chart-area__stroke--s2 { stroke: var(--chart-2); }
.kal-chart-area__stroke--s3 { stroke: var(--chart-3); }

.kal-chart-area__label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--chart-label);
  letter-spacing: 0.04em;
  text-anchor: middle;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 6. HEATMAP GRID
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-heatmap { width: 100%; }
.kal-heatmap__grid {
  display: grid;
  gap: 3px;
}
.kal-heatmap__cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: oklch(
    calc(var(--heatmap-min-l) - (var(--heatmap-min-l) - var(--heatmap-max-l)) * var(--val, 0))
    calc(var(--heatmap-min-c) + (var(--heatmap-max-c) - var(--heatmap-min-c)) * var(--val, 0))
    var(--heatmap-h)
  );
  transition: transform var(--motion-fast) var(--ease-standard),
              box-shadow var(--motion-fast);
  cursor: default;
  position: relative;
}
.kal-heatmap__cell:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
.kal-heatmap__row-label,
.kal-heatmap__col-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--chart-label);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex; align-items: center; justify-content: center;
}
.kal-heatmap__row-label { justify-content: flex-end; padding-right: 6px; }
.kal-heatmap__col-label { padding-bottom: 4px; }

.kal-heatmap__scale {
  display: flex; align-items: center; gap: 6px;
  margin-top: 10px; justify-content: flex-end;
}
.kal-heatmap__scale-label {
  font-family: var(--font-mono); font-size: 9px;
  color: var(--chart-label); letter-spacing: 0.04em;
}
.kal-heatmap__scale-bar {
  width: 80px; height: 8px; border-radius: 4px;
  background: linear-gradient(90deg,
    oklch(var(--heatmap-min-l) var(--heatmap-min-c) var(--heatmap-h)),
    oklch(var(--heatmap-max-l) var(--heatmap-max-c) var(--heatmap-h))
  );
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 7. STAT COMPARISON
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-compare {
  display: flex; align-items: flex-end; gap: 16px;
}
.kal-compare__label {
  font-size: 11px; font-family: var(--font-mono);
  letter-spacing: var(--ls-wide); text-transform: uppercase;
  color: var(--chart-label); margin-bottom: 4px;
}
.kal-compare__current {
  font-size: 28px; font-weight: var(--fw-bold);
  color: var(--ink); letter-spacing: -0.03em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.kal-compare__previous {
  font-size: 16px; font-weight: var(--fw-medium);
  color: var(--ink-3); letter-spacing: -0.01em; line-height: 1;
  font-variant-numeric: tabular-nums;
  text-decoration: line-through;
  text-decoration-color: var(--line-strong);
  text-decoration-thickness: 1px;
}
.kal-compare__delta {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; border-radius: var(--r-full);
  font-size: 11px; font-weight: var(--fw-bold);
  font-family: var(--font-mono); letter-spacing: 0.02em;
}
.kal-compare__delta--up {
  color: var(--ok);
  background: oklch(from var(--ok) l c h / 0.10);
}
.kal-compare__delta--down {
  color: var(--bad);
  background: oklch(from var(--bad) l c h / 0.10);
}
.kal-compare__delta--flat {
  color: var(--ink-3);
  background: oklch(from var(--ink-3) l c h / 0.08);
}
.kal-compare__bar {
  height: 4px; border-radius: 2px; margin-top: 8px;
  background: var(--line);
  overflow: hidden;
}
.kal-compare__bar-fill {
  height: 100%; border-radius: 2px;
  background: linear-gradient(90deg, var(--chart-1), var(--chart-2));
  transition: width 0.8s var(--ease-decelerate);
}

/* ═══════════════════════════════════════════════════════════════════════════
 * 8. TREND INDICATOR
 * ═══════════════════════════════════════════════════════════════════════════ */
.kal-trend {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; font-weight: var(--fw-bold);
  font-family: var(--font-mono);
  animation: kalFadeUp var(--motion-base) var(--ease-decelerate) both;
}
.kal-trend__arrow {
  display: inline-flex; flex-shrink: 0;
}
.kal-trend__arrow svg {
  display: block; stroke: currentColor; fill: none;
  stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round;
}
.kal-trend--up { color: var(--ok); }
.kal-trend--down { color: var(--bad); }
.kal-trend--flat { color: var(--ink-3); }

.kal-trend__delta {
  letter-spacing: 0.02em;
}
.kal-trend__value {
  color: var(--ink-2); font-weight: var(--fw-medium);
  margin-left: 4px;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * KEYFRAMES
 * ═══════════════════════════════════════════════════════════════════════════ */
@keyframes kal-bar-grow {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}
@keyframes kal-bar-grow-x {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@keyframes kal-chart-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════════════════════
 * REDUCED MOTION
 * ═══════════════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .kal-chart-line__path,
  .kal-chart-area__stroke { transition-duration: 1ms !important; }
  .kal-chart-bar--animate .kal-chart-bar__bar { animation-duration: 1ms !important; }
  .kal-chart-donut__seg { transition-duration: 1ms !important; }
  .kal-trend { animation-duration: 1ms !important; }
  .kal-heatmap__cell { transition-duration: 1ms !important; }
  .kal-compare__bar-fill { transition-duration: 1ms !important; }
}


/* ═══════════════════════════════════════════════════════════════════════════
 * THEME OVERRIDES
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── Dark themes: shared container patch ──────────────────────────────────── */
[data-theme="dark-glass"],
[data-theme="dark-yellow"],
[data-theme="neumorph"],
[data-theme="midnight"],
[data-theme="obsidian"] {
  & .kal-chart {
    background: var(--glass-bg); border-color: var(--glass-stroke-2);
  }
  & .kal-chart-donut__center-val { color: var(--ink); }
  & .kal-chart-line__dot { stroke: var(--bg-1); }
  & .kal-compare__delta--up { background: oklch(from var(--ok) l c h / 0.15); }
  & .kal-compare__delta--down { background: oklch(from var(--bad) l c h / 0.15); }
  & .kal-compare__bar { background: rgba(255,255,255,0.08); }
}

/* ── DARK GLASS — Cinema Luxury ───────────────────────────────────────────── */
[data-theme="dark-glass"] {
  --chart-draw-speed: 1.8s;
  --chart-bar-speed: 1s;
  --chart-1: #c8a878;
  --chart-2: #a78bfa;
  --chart-3: #60a5fa;
}
[data-theme="dark-glass"] .kal-chart {
  box-shadow:
    inset 0 1px 0 rgba(255,210,150,0.10),
    inset 0 0 0 1px rgba(255,210,150,0.05),
    0 8px 24px rgba(0,0,0,0.55);
  transition: transform .4s cubic-bezier(0.2,0.8,0.2,1), box-shadow .4s;
}
[data-theme="dark-glass"] .kal-chart:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,210,150,0.18),
    inset 0 0 0 1px rgba(255,210,150,0.10),
    0 16px 40px rgba(0,0,0,0.6);
}
[data-theme="dark-glass"] .kal-chart-line__path { stroke-width: 3; }
[data-theme="dark-glass"] .kal-chart-bar__bar { rx: 5; }
[data-theme="dark-glass"] .kal-heatmap__cell { border-radius: 5px; }

/* ── LIGHT WARM — Editorial Paper ─────────────────────────────────────────── */
[data-theme="light-warm"] {
  --chart-1: #e87a3a;
  --chart-2: #f0a060;
  --chart-3: #e8b888;
  --chart-draw-speed: 1s;
  --chart-bar-speed: 0.5s;
}
[data-theme="light-warm"] .kal-chart {
  background-image:
    radial-gradient(circle at 20% 30%, rgba(232,120,58,0.04) 0, transparent 40%);
  transition: transform .35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow .35s;
}
[data-theme="light-warm"] .kal-chart:hover {
  transform: translateY(-3px) scale(1.005);
}
[data-theme="light-warm"] .kal-chart-line__path { stroke-width: 2.5; }
[data-theme="light-warm"] .kal-chart-bar__bar { rx: 4; }
[data-theme="light-warm"] .kal-chart-donut__seg { stroke-linecap: round; }

/* ── DARK YELLOW — Terminal HUD ───────────────────────────────────────────── */
[data-theme="dark-yellow"] {
  --chart-1: #f5d547;
  --chart-2: #a3e635;
  --chart-3: #fde68a;
  --chart-draw-speed: 0.3s;
  --chart-bar-speed: 0.2s;
  --heatmap-h: 100;
  --heatmap-max-l: 0.80;
  --heatmap-max-c: 0.16;
}
[data-theme="dark-yellow"] .kal-chart {
  position: relative; overflow: hidden;
  transition: box-shadow .15s ease-out, transform .15s ease-out;
}
[data-theme="dark-yellow"] .kal-chart::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg, transparent 0, transparent 3px, rgba(245,213,71,0.02) 3px, rgba(245,213,71,0.02) 4px);
  border-radius: inherit;
}
[data-theme="dark-yellow"] .kal-chart:hover {
  border-color: rgba(245,213,71,0.4);
  box-shadow: 0 0 0 1px rgba(245,213,71,0.3), 0 0 24px rgba(245,213,71,0.18);
}
[data-theme="dark-yellow"] .kal-chart__title,
[data-theme="dark-yellow"] .kal-chart-line__label,
[data-theme="dark-yellow"] .kal-chart-bar__label,
[data-theme="dark-yellow"] .kal-chart-line__y-label,
[data-theme="dark-yellow"] .kal-chart-area__label,
[data-theme="dark-yellow"] .kal-heatmap__row-label,
[data-theme="dark-yellow"] .kal-heatmap__col-label {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em;
}
[data-theme="dark-yellow"] .kal-chart__title::before { content: '> '; color: #f5d547; opacity: 0.7; }
[data-theme="dark-yellow"] .kal-chart-line__path { stroke-width: 2; }
[data-theme="dark-yellow"] .kal-chart-bar__bar { rx: 2; }
[data-theme="dark-yellow"] .kal-heatmap__cell { border-radius: 2px; }

/* ── B&W — Swiss Brutalist ────────────────────────────────────────────────── */
[data-theme="bw"] {
  --chart-1: #000000;
  --chart-2: #555555;
  --chart-3: #888888;
  --chart-draw-speed: 0.08s;
  --chart-bar-speed: 0.08s;
  --chart-container-radius: 2px;
  --heatmap-h: 0;
  --heatmap-min-l: 0.95;
  --heatmap-min-c: 0;
  --heatmap-max-l: 0.15;
  --heatmap-max-c: 0;
}
[data-theme="bw"] .kal-chart {
  background: #fff;
  border: 1.5px solid #000;
  box-shadow: 4px 4px 0 0 #000;
  backdrop-filter: none;
  transition: transform .08s ease, box-shadow .08s ease;
}
[data-theme="bw"] .kal-chart:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 #000;
}
[data-theme="bw"] .kal-chart-line__path { stroke-width: 2; stroke-linecap: butt; }
[data-theme="bw"] .kal-chart-line__area { display: none; }
[data-theme="bw"] .kal-chart-area__fill { opacity: 0.08; }
[data-theme="bw"] .kal-chart-bar__bar { rx: 0; }
[data-theme="bw"] .kal-chart-donut__seg { stroke-linecap: butt; }
[data-theme="bw"] .kal-heatmap__cell { border-radius: 0; }
[data-theme="bw"] .kal-compare__bar-fill { background: #000; }
[data-theme="bw"] .kal-compare__delta--up,
[data-theme="bw"] .kal-compare__delta--down {
  background: transparent; border: 1.5px solid currentColor; border-radius: 0;
}
[data-theme="bw"] .kal-chart__title {
  font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
}

/* ── NEUMORPH — Soft Clay ─────────────────────────────────────────────────── */
[data-theme="neumorph"] {
  --chart-1: oklch(0.68 0.24 330);
  --chart-2: oklch(0.80 0.14 195);
  --chart-3: oklch(0.80 0.16 165);
  --chart-draw-speed: 1.4s;
  --chart-bar-speed: 0.8s;
  --chart-container-radius: 20px;
  --heatmap-h: 330;
}
[data-theme="neumorph"] .kal-chart {
  background: #232733;
  border: 1px solid transparent;
  backdrop-filter: none; -webkit-backdrop-filter: none;
  box-shadow:
    -7px -7px 16px rgba(255,255,255,0.025),
    9px 9px 22px rgba(0,0,0,0.50),
    inset 1px 1px 0 rgba(255,255,255,0.04);
}
[data-theme="neumorph"] .kal-chart:hover {
  box-shadow:
    -10px -10px 22px rgba(255,255,255,0.035),
    14px 14px 30px rgba(0,0,0,0.6),
    inset 1px 1px 0 rgba(255,255,255,0.05);
  transform: translateY(-2px);
}
[data-theme="neumorph"] .kal-chart-line__path {
  filter: drop-shadow(0 0 4px var(--chart-1));
}
[data-theme="neumorph"] .kal-chart-donut__seg {
  filter: drop-shadow(0 0 6px currentColor);
}
[data-theme="neumorph"] .kal-heatmap__cell {
  border-radius: 6px;
  box-shadow:
    inset 2px 2px 4px rgba(0,0,0,0.35),
    inset -2px -2px 4px rgba(255,255,255,0.03);
}

/* ── MOCHA — Artisan Pour ─────────────────────────────────────────────────── */
[data-theme="mocha"] {
  --chart-1: #8a5a3b;
  --chart-2: #b18968;
  --chart-3: #c8a685;
  --chart-draw-speed: 1.6s;
  --chart-bar-speed: 1s;
  --chart-container-radius: 28px;
  --heatmap-h: 50;
  --heatmap-max-l: 0.45;
}
[data-theme="mocha"] .kal-chart {
  border-radius: 28px 32px 36px 26px;
  box-shadow:
    inset 0 1px 0 rgba(255,247,235,0.5),
    0 4px 12px rgba(80,50,20,0.06),
    0 16px 36px rgba(80,50,20,0.08);
  transition: transform .6s cubic-bezier(0.4, 0, 0.2, 1), box-shadow .6s;
}
[data-theme="mocha"] .kal-chart:hover {
  transform: translateY(-2px) rotate(-0.5deg);
}
[data-theme="mocha"] .kal-chart-line__grid,
[data-theme="mocha"] .kal-chart-bar__grid,
[data-theme="mocha"] .kal-chart-area__grid {
  stroke-dasharray: 4 3;
}
[data-theme="mocha"] .kal-chart-bar__bar { rx: 8; }
[data-theme="mocha"] .kal-heatmap__cell { border-radius: 8px; }
[data-theme="mocha"] .kal-chart-donut__seg { stroke-linecap: round; }

/* ── SAGE — Spa Calm ──────────────────────────────────────────────────────── */
[data-theme="sage"] {
  --chart-1: #5a8a52;
  --chart-2: #88b07a;
  --chart-3: #b5cfa2;
  --chart-draw-speed: 1.4s;
  --chart-bar-speed: 0.8s;
  --heatmap-h: 140;
}
[data-theme="sage"] .kal-chart {
  box-shadow:
    inset 0 1px 0 rgba(255,255,250,0.7),
    inset 0 -1px 0 rgba(40,60,30,0.06),
    0 1px 3px rgba(40,60,30,0.04),
    0 8px 20px rgba(40,60,30,0.06);
  transition: transform .35s ease, box-shadow .35s ease;
}
[data-theme="sage"] .kal-chart:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,255,250,0.7),
    inset 0 -1px 0 rgba(40,60,30,0.06),
    0 4px 8px rgba(40,60,30,0.06),
    0 16px 32px rgba(40,60,30,0.10);
}
[data-theme="sage"] .kal-chart__title,
[data-theme="sage"] .kal-chart-line__label,
[data-theme="sage"] .kal-chart-bar__label {
  letter-spacing: 0.12em; font-weight: 500;
}

/* ── MIDNIGHT — Mission Control ───────────────────────────────────────────── */
[data-theme="midnight"] {
  --chart-1: #5cd8ff;
  --chart-2: #82e8ff;
  --chart-3: #7df3c4;
  --chart-draw-speed: 0.8s;
  --chart-bar-speed: 0.4s;
  --heatmap-h: 220;
}
[data-theme="midnight"] .kal-chart {
  position: relative; overflow: hidden;
  box-shadow:
    inset 0 0 0 1px rgba(92,216,255,0.10),
    0 4px 16px rgba(92,216,255,0.06),
    0 12px 30px rgba(0,5,20,0.5);
  transition: box-shadow .25s var(--ease-decelerate), transform .25s;
}
[data-theme="midnight"] .kal-chart::before {
  content: ''; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: linear-gradient(180deg, rgba(92,216,255,0.04) 0%, transparent 30%);
  z-index: 1;
}
[data-theme="midnight"] .kal-chart:hover {
  box-shadow:
    inset 0 0 0 1px rgba(92,216,255,0.35),
    0 0 30px rgba(92,216,255,0.20),
    0 16px 40px rgba(0,5,20,0.55);
}
[data-theme="midnight"] .kal-chart-line__path {
  filter: drop-shadow(0 0 6px rgba(92,216,255,0.5));
}
[data-theme="midnight"] .kal-chart-donut__seg {
  filter: drop-shadow(0 0 4px currentColor);
}
[data-theme="midnight"] .kal-chart__title,
[data-theme="midnight"] .kal-chart-line__label,
[data-theme="midnight"] .kal-chart-bar__label,
[data-theme="midnight"] .kal-chart-line__y-label,
[data-theme="midnight"] .kal-chart-area__label,
[data-theme="midnight"] .kal-heatmap__row-label,
[data-theme="midnight"] .kal-heatmap__col-label {
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em;
}
[data-theme="midnight"] .kal-chart__title::before { content: '[ '; color: var(--violet); opacity: 0.7; }
[data-theme="midnight"] .kal-chart__title::after  { content: ' ]'; color: var(--violet); opacity: 0.7; }

/* ── CORAL — Bubble Pop ───────────────────────────────────────────────────── */
[data-theme="coral"] {
  --chart-1: #e85a55;
  --chart-2: #f49080;
  --chart-3: #f8b8a0;
  --chart-draw-speed: 1s;
  --chart-bar-speed: 0.6s;
  --chart-container-radius: 24px;
  --heatmap-h: 30;
}
[data-theme="coral"] .kal-chart {
  background-image:
    radial-gradient(circle at 0% 0%, rgba(232,90,85,0.05) 0, transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(244,144,128,0.04) 0, transparent 40%);
  box-shadow:
    inset 0 1px 0 rgba(255,250,245,0.8),
    0 6px 18px rgba(120,40,20,0.07),
    0 20px 40px rgba(120,40,20,0.10);
  transition: transform .45s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow .45s;
}
[data-theme="coral"] .kal-chart:hover {
  transform: translateY(-4px) scale(1.01);
}
[data-theme="coral"] .kal-chart-bar__bar { rx: 6; }
[data-theme="coral"] .kal-heatmap__cell { border-radius: 6px; }
[data-theme="coral"] .kal-heatmap__cell:hover { transform: scale(1.25); }

/* ── OBSIDIAN — Cron Premium ──────────────────────────────────────────────── */
[data-theme="obsidian"] {
  --chart-1: #c8c8d4;
  --chart-2: #e0e0ea;
  --chart-3: #aebcc8;
  --chart-draw-speed: 1.5s;
  --chart-bar-speed: 0.9s;
  --heatmap-h: 280;
}
[data-theme="obsidian"] .kal-chart {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04) 0%, transparent 50%),
    var(--glass-bg);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.10),
    inset 0 0 0 1px rgba(255,255,255,0.04),
    0 12px 36px rgba(0,0,0,0.55);
  transition: transform .5s var(--ease-decelerate), box-shadow .5s;
}
[data-theme="obsidian"] .kal-chart:hover {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 50%),
    var(--glass-bg-strong);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.15),
    inset 0 0 0 1px rgba(255,255,255,0.08),
    0 20px 50px rgba(0,0,0,0.7);
  transform: translateY(-2px);
}
[data-theme="obsidian"] .kal-chart__title {
  font-size: 9px; letter-spacing: 0.16em; font-weight: 600;
}

/* ── LIQUID GLASS — Frosted Translucent ───────────────────────────────────── */
[data-theme="liquid-glass"] {
  --chart-draw-speed: 1s;
  --chart-bar-speed: 0.6s;
  --chart-container-radius: 20px;
}
[data-theme="liquid-glass"] .kal-chart {
  background: rgba(255,255,255,0.35);
  backdrop-filter: blur(24px) saturate(1.8) brightness(1.05);
  -webkit-backdrop-filter: blur(24px) saturate(1.8) brightness(1.05);
  border: 1px solid rgba(255,255,255,0.50);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.75),
    inset 0 0 0 0.5px rgba(255,255,255,0.35),
    0 8px 32px oklch(0.50 0.06 270 / 0.10),
    0 2px 8px oklch(0.50 0.06 270 / 0.06);
  transition: transform 0.3s cubic-bezier(0.2,0.8,0.2,1),
              box-shadow 0.3s cubic-bezier(0.2,0.8,0.2,1),
              background 0.3s cubic-bezier(0.2,0.8,0.2,1);
}
[data-theme="liquid-glass"] .kal-chart:hover {
  background: rgba(255,255,255,0.45);
  transform: translateY(-3px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.85),
    inset 0 0 0 0.5px rgba(255,255,255,0.45),
    0 16px 48px oklch(0.50 0.06 270 / 0.14),
    0 4px 12px oklch(0.50 0.06 270 / 0.08);
}
[data-theme="liquid-glass"] .kal-heatmap__cell { border-radius: 8px; }