/* Material Design 3 tokens + components for the AutoTS PWA.
   A focused subset of MD3: color roles, typography scale, shape, elevation,
   and the handful of components the app uses (top app bar, cards, buttons,
   text fields, segmented tabs, sliders). */

/* Self-hosted fonts (offline-capable PWA): Inter for all UI/body, Cinzel for
   the classical wordmark and rare hero headings. Subsetted woff2 in fonts/. */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/inter-variable.woff2") format("woff2");
}
@font-face {
  font-family: "Cinzel";
  font-style: normal;
  font-weight: 500 600;
  font-display: swap;
  src: url("fonts/cinzel-variable.woff2") format("woff2");
}

/* "Aegean Classical Modern" theme.
   Light = limestone/marble surfaces with deep Aegean cyan for action;
   bronze/gold as a sparse metallic accent; terracotta for error/warmth.
   Dark = "wine-dark sea" surfaces with a muted turquoise glow.
   Component CSS only ever references these role tokens, never raw hex. */

:root {
  color-scheme: light;

  /* --- Color roles: LIGHT (limestone + deep Aegean) --- */
  /* Surfaces — warm neutral keyed toward stone, not clinical white */
  --md-surface: #faf8f3;
  --md-surface-container: #efebe2;
  --md-surface-container-high: #e7e2d7;
  --md-on-surface: #1b1c1a;
  --md-on-surface-variant: #46494a;
  --md-outline: #79766e;
  --md-outline-variant: #ccc8bc;

  /* Primary — Aegean cyan (darker tone for contrast on light) */
  --md-primary: #00696e;
  --md-on-primary: #ffffff;
  --md-primary-container: #9df0ef;
  --md-on-primary-container: #00201f;

  /* Secondary — wine-dark sea / sea-slate (structure, chrome) */
  --md-secondary: #3b5461;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #cfe4ec;
  --md-on-secondary-container: #0e2a33;

  /* Tertiary — bronze / mosaic gold (sparse classical accent) */
  --md-tertiary: #7a5900;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #ffdda6;
  --md-on-tertiary-container: #3a2600;

  /* Error — terracotta clay */
  --md-error: #9c4230;
  --md-on-error: #ffffff;
  --md-error-container: #ffdad3;
  --md-on-error-container: #3d0600;

  /* Warning + success (tokenized so they survive dark mode) */
  --md-warning: #7a4d00;
  --md-on-warning-container: #3a2600;
  --md-success: #2e7d32;
  --md-success-container: #cdedcf;

  /* --- Data-viz (theme-aware) --- */
  --viz-actuals: var(--md-primary);          /* turquoise, solid */
  --viz-forecast: var(--md-tertiary);        /* bronze/gold, dashed */
  --viz-uncertainty-fill: color-mix(in srgb, #74658f 24%, transparent);
  --viz-uncertainty-line: #74658f;
  --viz-grid: color-mix(in srgb, var(--md-outline) 35%, transparent);

  /* Multi-series palette: 7 perceptually distinct colours from odyssey palette.
     Ordered for best visual separation when only a few are toggled on.
     Dark-enough for contrast on limestone light surfaces. */
  --viz-s0: #009898; /* Aegean turquoise (actuals anchor) */
  --viz-s1: #5E8B82; /* verdigris patina */
  --viz-s2: #8A3461; /* Tyrian purple */
  --viz-s3: #C0563B; /* terracotta */
  --viz-s4: #2E5A78; /* deep-sea blue */
  --viz-s5: #9B7500; /* ochre (darkened for light-bg contrast) */
  --viz-s6: #C68A2E; /* bronze/gold */

  /* --- Metallic bronze (reserved for one ceremonial emblem) --- */
  --metal-bronze-dark: #5e4200;
  --metal-bronze-mid: #c68a2e;
  --metal-bronze-light: #ffe2a8;

  /* Shape */
  --md-shape-sm: 8px;
  --md-shape-md: 12px;
  --md-shape-lg: 16px;
  --md-shape-xl: 28px;

  /* Elevation */
  --md-elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
  --md-elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);

  /* Typography — modern grotesk for UI, Cinzel for the classical wordmark */
  --md-font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --md-font-display: "Cinzel", Georgia, "Times New Roman", serif;
}

/* Dark theme tokens. Two equivalent blocks below: an explicit manual choice
   (data-theme="dark") and the OS-default fallback (prefers dark + not manually
   set to light), so the manual toggle always wins. */
:root[data-theme="dark"] {
  color-scheme: dark;

  /* Surfaces — deep desaturated sea-blue ("wine-dark sea") */
  --md-surface: #0e1a22;
  --md-surface-container: #16252f;
  --md-surface-container-high: #1e303b;
  --md-on-surface: #dfe4e3;
  --md-on-surface-variant: #bfc8c8;
  --md-outline: #899392;
  --md-outline-variant: #3f484a;

  --md-primary: #56d6ec;
  --md-on-primary: #003640;
  --md-primary-container: #005050;
  --md-on-primary-container: #9df0ef;

  --md-secondary: #a3cddb;
  --md-on-secondary: #203641;
  --md-secondary-container: #2f4c5b;
  --md-on-secondary-container: #cfe4ec;

  --md-tertiary: #f5be49;
  --md-on-tertiary: #412d00;
  --md-tertiary-container: #5e4200;
  --md-on-tertiary-container: #ffdda6;

  --md-error: #ffb4a7;
  --md-on-error: #5f160b;
  --md-error-container: #7d2c1f;
  --md-on-error-container: #ffdad3;

  --md-warning: #f5be49;
  --md-on-warning-container: #ffdda6;
  --md-success: #8fd896;
  --md-success-container: #1e3d24;

  --metal-bronze-dark: #3a2600;
  --metal-bronze-mid: #c68a2e;
  --metal-bronze-light: #f5d58a;

  --viz-uncertainty-fill: color-mix(in srgb, #b7a5d8 28%, transparent);
  --viz-uncertainty-line: #b7a5d8;

  /* Multi-series palette — bright versions for wine-dark-sea surfaces */
  --viz-s0: #56D6EC; /* bright turquoise */
  --viz-s1: #8FBAAF; /* light verdigris */
  --viz-s2: #D48BAF; /* light Tyrian purple */
  --viz-s3: #E08570; /* light terracotta */
  --viz-s4: #72A4C6; /* light sea-blue */
  --viz-s5: #D9B26A; /* gold */
  --viz-s6: #F5BE49; /* bright bronze */
}

/* OS-default dark (no explicit user choice). Mirrors the block above. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --md-surface: #0e1a22;
    --md-surface-container: #16252f;
    --md-surface-container-high: #1e303b;
    --md-on-surface: #dfe4e3;
    --md-on-surface-variant: #bfc8c8;
    --md-outline: #899392;
    --md-outline-variant: #3f484a;

    --md-primary: #56d6ec;
    --md-on-primary: #003640;
    --md-primary-container: #005050;
    --md-on-primary-container: #9df0ef;

    --md-secondary: #a3cddb;
    --md-on-secondary: #203641;
    --md-secondary-container: #2f4c5b;
    --md-on-secondary-container: #cfe4ec;

    --md-tertiary: #f5be49;
    --md-on-tertiary: #412d00;
    --md-tertiary-container: #5e4200;
    --md-on-tertiary-container: #ffdda6;

    --md-error: #ffb4a7;
    --md-on-error: #5f160b;
    --md-error-container: #7d2c1f;
    --md-on-error-container: #ffdad3;

    --md-warning: #f5be49;
    --md-on-warning-container: #ffdda6;
    --md-success: #8fd896;
    --md-success-container: #1e3d24;

    --metal-bronze-dark: #3a2600;
    --metal-bronze-mid: #c68a2e;
    --metal-bronze-light: #f5d58a;

    --viz-uncertainty-fill: color-mix(in srgb, #b7a5d8 28%, transparent);
    --viz-uncertainty-line: #b7a5d8;

    --viz-s0: #56D6EC;
    --viz-s1: #8FBAAF;
    --viz-s2: #D48BAF;
    --viz-s3: #E08570;
    --viz-s4: #72A4C6;
    --viz-s5: #D9B26A;
    --viz-s6: #F5BE49;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--md-font);
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.5;
}

/* Typography scale */
.md-display { font-size: 2.25rem; font-weight: 400; letter-spacing: 0; }
.md-headline { font-size: 1.5rem; font-weight: 500; }
.md-title { font-size: 1.125rem; font-weight: 500; }
.md-body { font-size: 0.95rem; }
.md-label { font-size: 0.8rem; font-weight: 500; color: var(--md-on-surface-variant); }

/* Top app bar */
.md-appbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--md-surface-container);
  box-shadow: var(--md-elev-1);
  position: sticky;
  top: 0;
  z-index: 10;
}
/* Wordmark + tagline are different sizes, so align them (and the emblem) by
   their vertical centers rather than a shared baseline — otherwise the smaller
   tagline's centroid sits below the larger wordmark's. */
.md-appbar .wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
}
.md-appbar .brand {
  display: inline-block;
  font-family: var(--md-font-display);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: .06em;
  /* Keep the natural mixed case ("AutoTS"): Cinzel renders the lowercase letters
     as small capitals, so the taller A/T/S vs. shorter u-t-o make the
     capitalization legible and avoid the all-caps "AU-TOTS" misreading. */
  /* thin gold keyline under the wordmark. The matching padding-top keeps the
     text centered within the box (offsetting the 3px padding + 2px border below)
     so center-alignment lands on the glyph centroid, not above it. */
  padding-top: 5px;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg,
      var(--metal-bronze-mid), color-mix(in srgb, var(--metal-bronze-light) 60%, transparent), transparent) 1;
}
/* Tagline in the same classical serif as the wordmark, smaller and lighter. */
.md-appbar .tagline {
  font-family: var(--md-font-display);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: .04em;
  color: var(--md-on-surface-variant);
}
.md-appbar .spacer { flex: 1; }

/* Ceremonial metallic emblem — the one true-metal flourish. Used sparingly on
   a key symbol only, never on a core control. */
.metal-bronze {
  --metal-angle: 220deg;
  background:
    conic-gradient(from var(--metal-angle),
      var(--metal-bronze-dark) 0deg,
      var(--metal-bronze-mid) 42deg,
      var(--metal-bronze-light) 78deg,
      var(--metal-bronze-mid) 112deg,
      var(--metal-bronze-dark) 156deg,
      var(--metal-bronze-mid) 214deg,
      var(--metal-bronze-light) 252deg,
      var(--metal-bronze-mid) 292deg,
      var(--metal-bronze-dark) 360deg);
  border: 1px solid var(--md-outline-variant);
  box-shadow: var(--md-elev-1);
}
.md-emblem {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  /* Center the (smaller) icon glyph within the box so its centroid aligns with
     the wordmark, rather than floating at the top of the line. */
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Theme toggle (icon button in the app bar) */
.md-theme-toggle {
  font-size: 1.1rem;
  line-height: 1;
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  border-radius: 999px;
  padding: 8px 10px;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.md-theme-toggle:hover { background: var(--md-surface-container-high); }
.md-theme-toggle:focus-visible { outline: 3px solid var(--md-primary-container); outline-offset: 2px; }
.md-toggle-icon { display: inline-flex; }
.md-toggle-glyph {
  width: 22px;
  height: 22px;
  display: block;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,.28));
  transition: transform .2s ease;
}
.md-theme-toggle:hover .md-toggle-glyph { transform: rotate(-12deg) scale(1.06); }

/* Subtle icon button (cached-data row actions) — quiet at rest, colours on intent. */
.md-icon-btn {
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  border-radius: 999px;
  padding: 6px;
  line-height: 0;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.md-icon-btn:hover:not(:disabled) { background: var(--md-surface-container-high); }
.md-icon-btn.danger:hover:not(:disabled) { color: var(--md-error); }
.md-icon-btn:focus-visible { outline: 3px solid var(--md-primary-container); outline-offset: 2px; }
.md-icon-btn.danger:focus-visible { outline-color: var(--md-error-container); }
.md-icon-btn:disabled { opacity: .4; cursor: not-allowed; }
.md-icon-glyph { width: 18px; height: 18px; display: block; }

.md-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.md-page-shell {
  max-width: 1368px;
  margin: 0 auto;
}

.md-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4px 24px 24px;
  text-align: right;
  font-size: .8rem;
}
.md-footer a { color: var(--md-on-surface-variant); }

/* Card */
.md-card {
  background: var(--md-surface-container);
  border-radius: var(--md-shape-lg);
  padding: 20px;
  box-shadow: var(--md-elev-1);
}
/* Card heading — classical display face, a bronze Roman-numeral ordinal, and a
   thin metallic keyline that echoes the wordmark underline. */
.md-card > h2 {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin: 0 0 18px;
  padding-bottom: 10px;
  font-family: var(--md-font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: .015em;
  color: var(--md-on-surface);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg,
      color-mix(in srgb, var(--metal-bronze-mid) 75%, transparent),
      color-mix(in srgb, var(--metal-bronze-light) 45%, transparent) 38%,
      transparent 82%) 1;
}
.md-section-num {
  flex: 0 0 auto;
  font-family: var(--md-font-display);
  font-weight: 600;
  font-size: 1.4rem;
  line-height: 1;
  letter-spacing: .04em;
  padding-right: .6rem;
  border-right: 1px solid var(--md-outline-variant);
  /* engraved-bronze fill, matching the corner emblem */
  background: linear-gradient(160deg,
      var(--metal-bronze-light),
      var(--metal-bronze-mid) 52%,
      var(--metal-bronze-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.md-section-title { color: var(--md-on-surface); }
/* Trailing action (e.g. refresh) in an unnumbered card heading: pushed to the
   right edge and vertically centered against the baseline-aligned title. */
.md-section-action { margin-left: auto; align-self: center; }

/* Buttons */
.md-btn {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  cursor: pointer;
  transition: box-shadow .15s, background .15s, opacity .15s;
}
.md-btn:disabled { opacity: .5; cursor: not-allowed; }
.md-btn.filled { background: var(--md-primary); color: var(--md-on-primary); }
.md-btn.filled:hover:not(:disabled) { box-shadow: var(--md-elev-2); }
.md-btn.filled.error { background: var(--md-error); color: var(--md-on-error); }
.md-btn.tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.md-btn.outlined { background: transparent; color: var(--md-primary); border: 1px solid var(--md-outline); }
.md-btn.text { background: transparent; color: var(--md-primary); padding: 10px 12px; }
.md-btn.text.error { color: var(--md-error); }
.md-btn.forecast-duration-short {
  background: var(--md-primary-container); color: var(--md-on-primary-container);
}
.md-btn.forecast-duration-medium {
  background: var(--md-primary); color: var(--md-on-primary);
}
.md-btn.forecast-duration-long {
  background: var(--md-secondary); color: var(--md-on-secondary);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--md-outline) 45%, transparent);
}
.md-btn.forecast-duration-short:hover:not(:disabled),
.md-btn.forecast-duration-medium:hover:not(:disabled),
.md-btn.forecast-duration-long:hover:not(:disabled) { box-shadow: var(--md-elev-2); }
.md-btn:focus-visible { outline: 3px solid var(--md-primary-container); outline-offset: 2px; }
.md-btn.error:focus-visible { outline-color: var(--md-error-container); }

.md-btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.md-card-actions {
  display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center;
  gap: 8px; margin-top: 16px; padding-top: 12px;
  border-top: 1px solid var(--md-outline-variant);
}
.md-confirmation {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: 16px; margin-top: 12px; padding: 16px;
  border-radius: var(--md-shape-md);
  background: var(--md-error-container); color: var(--md-on-error-container);
}
.md-confirmation p { margin: 4px 0 0; }

/* Text fields */
.md-field { display: flex; flex-direction: column; gap: 6px; }
.md-field textarea,
.md-field input[type="text"],
.md-field input[type="url"],
.md-field input[type="number"],
.md-field select {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 14px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-sm);
  background: var(--md-surface);
  color: var(--md-on-surface);
}
.md-field textarea { min-height: 120px; resize: vertical; font-family: ui-monospace, monospace; }
.md-field textarea:focus,
.md-field input:focus,
.md-field select:focus { outline: 2px solid var(--md-primary); border-color: var(--md-primary); }

/* Segmented tabs */
.md-tabs { display: inline-flex; border: 1px solid var(--md-outline); border-radius: 999px; overflow: hidden; }
.md-tabs button {
  font-family: inherit; font-size: 0.85rem; font-weight: 500;
  border: none; background: transparent; color: var(--md-on-surface-variant);
  padding: 8px 18px; cursor: pointer;
}
.md-tabs button.active { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }

/* Expander */
.md-expander summary {
  cursor: pointer; font-weight: 500; color: var(--md-primary);
  padding: 8px 0; list-style: none;
}
.md-expander summary::-webkit-details-marker { display: none; }
.md-expander summary::before { content: "▸ "; }
.md-expander[open] summary::before { content: "▾ "; }

/* Chart */
.md-chart-wrap { position: relative; }
.md-chart {
  width: 100%; background: var(--md-surface); border-radius: var(--md-shape-md);
  /* let pointer drag-to-zoom work without the page scrolling/selecting */
  touch-action: none; cursor: crosshair; user-select: none;
}
.md-chart svg { display: block; width: 100%; height: auto; pointer-events: none; }

/* Pointer overlay: crosshair, tooltip, drag-select rectangle.
   The plot area spans ~4.7%..88.8% of the chart height (PAD_T/PAD_B of a
   340-unit viewBox); overlay pieces align to that band. */
.md-chart-crosshair {
  position: absolute; top: 4.7%; bottom: 11.2%; width: 0;
  border-left: 1px dashed var(--md-outline);
  transform: translateX(-0.5px); pointer-events: none;
}
.md-chart-brush {
  position: absolute; top: 4.7%; bottom: 11.2%;
  background: color-mix(in srgb, var(--md-primary) 16%, transparent);
  border-left: 1px solid var(--md-primary);
  border-right: 1px solid var(--md-primary);
  pointer-events: none;
}
.md-chart-tooltip {
  position: absolute; top: 6px; transform: translateX(-50%);
  min-width: 90px; max-width: 220px;
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-sm);
  box-shadow: var(--md-elev-2);
  padding: 6px 8px; pointer-events: none; z-index: 2;
}
.md-tt-date { font-size: 0.72rem; color: var(--md-on-surface-variant); margin-bottom: 3px; }
.md-tt-row { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; line-height: 1.5; }
.md-tt-swatch { width: 9px; height: 9px; border-radius: 2px; flex-shrink: 0; }
.md-tt-name { color: var(--md-on-surface); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.md-tt-val { margin-left: auto; font-weight: 600; font-family: "Roboto Mono", ui-monospace, monospace; }
.md-tt-feature {
  margin-top: 3px; color: var(--md-on-surface-variant); font-size: 0.72rem;
  font-weight: 700; letter-spacing: .04em;
}

.md-series-chip-swatch {
  width: 10px; height: 10px; border-radius: 2px;
  background: var(--md-primary); flex-shrink: 0;
}

/* Scrollable checkbox dropdown for series selection (lives in a chart-controls
   row as a compact picker chip, alongside Reset zoom / toggle chips). */
.md-series-select { max-width: 280px; }
.md-dropdown { position: relative; }
/* Compact picker chip trigger — matches the chart-control chip vocabulary
   (md-feat-chip / md-toggle-chip): auto width, pill, outline-variant border. */
.md-series-trigger {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  border: 1.5px solid var(--md-outline-variant); background: transparent;
  color: var(--md-on-surface-variant); font: inherit; font-size: 0.85rem;
  cursor: pointer; white-space: nowrap;
  transition: background .15s, color .15s, border-color .15s;
}
.md-series-trigger:hover { color: var(--md-on-surface); border-color: var(--md-outline); }
.md-series-trigger.open {
  background: var(--md-surface-container-high);
  color: var(--md-on-surface); border-color: var(--md-outline);
}
.md-series-trigger:focus-visible { outline: 3px solid var(--md-primary-container); outline-offset: 2px; }
.md-series-trigger-mark { display: inline-flex; line-height: 0; flex-shrink: 0; }
.md-dropdown-caret { transition: transform .2s; }
.md-series-trigger.open .md-dropdown-caret { transform: rotate(180deg); }
.md-dropdown-panel {
  position: absolute; z-index: 5; margin-top: 4px; width: 100%; min-width: 220px;
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-md);
  box-shadow: var(--md-elev-2); overflow: hidden;
}
.md-dropdown-actions { padding: 4px 8px; border-bottom: 1px solid var(--md-outline-variant); }
.md-dropdown-list { max-height: 240px; overflow-y: auto; padding: 4px; }
.md-dropdown-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: var(--md-shape-sm); cursor: pointer; font-size: 0.9rem;
}
.md-dropdown-item:hover { background: var(--md-surface-container); }
.md-dropdown-item input { accent-color: var(--md-primary); }

/* Interactive detected-feature legend (toggles per-type markers on the plot) */
.md-feat-legend { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.md-feat-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px 4px 8px; border-radius: 999px;
  border: 1.5px solid var(--md-outline-variant); background: transparent;
  color: var(--md-on-surface-variant); font: inherit; font-size: 0.8rem; cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.md-feat-chip.active { background: var(--md-surface-container-high); color: var(--md-on-surface); border-color: var(--md-outline); }
.md-feat-chip:disabled { opacity: .45; cursor: default; }
.md-feat-glyph { display: inline-flex; width: 13px; height: 13px; opacity: .55; filter: saturate(.6); }
.md-feat-chip.active .md-feat-glyph { opacity: 1; filter: none; }

/* Pill toggle (e.g. uncertainty bounds) */
.md-toggle-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px 7px 12px; border-radius: 999px;
  border: 1.5px solid var(--md-outline-variant); background: transparent;
  color: var(--md-on-surface-variant); font: inherit; font-size: 0.85rem; cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.md-toggle-chip-mark {
  width: 28px; height: 16px; border-radius: 999px; flex-shrink: 0;
  background: var(--md-outline-variant); position: relative; transition: background .15s;
}
.md-toggle-chip-mark::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--md-surface); transition: transform .15s;
}
.md-toggle-chip.active { color: var(--md-on-surface); border-color: var(--md-primary); }
.md-toggle-chip.active .md-toggle-chip-mark { background: var(--md-primary); }
.md-toggle-chip.active .md-toggle-chip-mark::after { transform: translateX(12px); }
.md-toggle-chip:disabled { opacity: .45; cursor: default; }

.md-chart-controls {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 12px; margin-bottom: 10px;
}
.md-chart-controls .spacer { flex: 1; }
.md-chart-legend { display: flex; gap: 16px; color: var(--md-on-surface-variant); font-size: .85rem; }
.md-chart-legend span { display: inline-flex; align-items: center; gap: 6px; }
.md-chart-legend i { display: inline-block; width: 24px; height: 3px; border-radius: 2px; }
/* Solid line for actuals, dashed pattern for forecast (line style, not color) */
.md-chart-legend i.actuals { background: var(--viz-s0); }
.md-chart-legend i.forecast {
  background: repeating-linear-gradient(
    to right,
    var(--viz-s0) 0, var(--viz-s0) 6px,
    transparent 6px, transparent 10px
  );
}

/* Accessible data table (paired with every chart) */
.md-table-wrap { max-height: 280px; overflow: auto; border-radius: var(--md-shape-sm); }
table.md-table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
table.md-table th, table.md-table td { padding: 6px 10px; text-align: right; border-bottom: 1px solid var(--md-outline-variant); }
table.md-table th:first-child, table.md-table td:first-child { text-align: left; }
table.md-table thead th { position: sticky; top: 0; background: var(--md-surface-container-high); }

/* Adjustment sliders */
.md-adjust-row { display: grid; grid-template-columns: 120px 1fr 90px; gap: 12px; align-items: center; padding: 4px 0; }
.md-adjust-row input[type="range"] { width: 100%; accent-color: var(--md-primary); }

/* Responsive session status: fixed bottom sheet by default, sticky rail on wide screens. */
.md-session-panel {
  position: fixed;
  z-index: 20;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  width: min(680px, calc(100% - 24px));
  max-height: min(60vh, 28rem);
  max-height: min(60dvh, 28rem);
  margin: 0 auto;
  padding: 12px 16px;
  overflow-y: auto;
  color: var(--md-on-surface);
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-lg);
  box-shadow: var(--md-elev-2);
}
.md-session-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
}
.md-session-heading {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}
.md-session-title {
  flex: 0 0 auto;
  padding-right: 10px;
  font-family: var(--md-font-display);
  font-weight: 600;
  letter-spacing: .03em;
  border-right: 1px solid var(--metal-bronze-mid);
}
.md-session-state-indicator {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--md-outline);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-outline) 16%, transparent);
}
.md-session-state-indicator.ready {
  background: var(--md-success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-success) 16%, transparent);
}
.md-session-state-indicator.running {
  background: var(--md-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-primary) 16%, transparent);
}
.md-session-state-indicator.warning {
  background: var(--md-warning);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-warning) 16%, transparent);
}
.md-session-state-indicator.failed {
  background: var(--md-error);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-error) 16%, transparent);
}
.md-session-state {
  min-width: 0;
  overflow: hidden;
  color: var(--md-on-surface-variant);
  font-size: .82rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.md-session-activity {
  margin: 4px 0 0;
  overflow: hidden;
  color: var(--md-on-surface-variant);
  font-size: .85rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.md-session-panel .md-progress { margin-top: 8px; }
.md-session-error { margin: 10px 0 0; overflow-wrap: anywhere; }
.md-session-cancel { margin-top: 12px; }
.md-btn.text.error { color: var(--md-error); }
.md-btn.text.error:hover:not(:disabled) { background: var(--md-error-container); }
.md-disabled-explanation { display: inline-flex; border-radius: 999px; }
.md-disabled-explanation:focus-visible {
  outline: 3px solid var(--md-primary-container);
  outline-offset: 2px;
}
.md-chip { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--md-primary-container); color: var(--md-on-primary-container); font-size: 0.8rem; font-weight: 500; margin: 2px; }
.md-error { color: var(--md-error); }
.md-warning { color: var(--md-warning); }

/* Cache summaries keep each object to one row; metadata remains available on demand. */
.md-cache-group { margin-top: 16px; }
.md-cache-group h3 { margin: 0 0 6px; font-size: .95rem; text-transform: capitalize; }
.md-cache-table { min-width: 860px; }
.md-cache-table th:last-child, .md-cache-table td:last-child { text-align: left; }
.md-cache-table pre { max-width: 420px; white-space: pre-wrap; overflow-wrap: anywhere; }
.md-cache-id {
  max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-family: ui-monospace, monospace;
}
.md-cache-actions { display: flex; gap: 4px; align-items: center; white-space: nowrap; }
.md-storage-summary { margin: 10px 0 0; }

/* Model parameters shown inside a cached prediction's "Details" disclosure. */
.md-cache-params { display: grid; gap: 8px; margin: 8px 0 4px; }
.md-cache-params dt {
  margin: 0; font-weight: 600; font-size: .8rem; color: var(--md-on-surface-variant);
}
.md-cache-params dd {
  margin: 2px 0 0; font-family: ui-monospace, monospace; font-size: .8rem;
  max-height: 6.5em; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere;
}

/* Compact inline delete confirmation for a single cached row. */
.md-cache-confirm {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 8px 0;
  padding: 8px 12px; border-radius: var(--md-shape-md);
  background: var(--md-error-container); color: var(--md-on-error-container);
  font-size: .85rem;
}

/* Progress bar (indeterminate) */
.md-progress { height: 4px; background: var(--md-primary-container); border-radius: 2px; overflow: hidden; }
.md-progress > div { height: 100%; width: 40%; background: var(--md-primary); border-radius: 2px; animation: md-indeterminate 1.2s infinite ease-in-out; }
@keyframes md-indeterminate { 0% { margin-left: -40%; } 100% { margin-left: 100%; } }

/* Progress bar (determinate) — width set inline from "(i/total)" progress text */
.md-progress.determinate > div { margin-left: 0; animation: none; transition: width .25s ease; }

/* Live data sources */
.md-chip.off { background: var(--md-surface-container-high); color: var(--md-on-surface-variant); }
.md-chip.warn { background: var(--md-tertiary-container); color: var(--md-on-warning-container); }
.md-chip.ready { background: var(--md-success-container); color: var(--md-success); }

.md-date-row { display: flex; flex-wrap: wrap; gap: 16px; margin: 12px 0; }
.md-date-row .md-field { max-width: 200px; }

.md-sources { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; }
.md-source-card { border: 1px solid var(--md-outline-variant); border-radius: var(--md-shape-sm); padding: 6px 12px; }
.md-source-head { display: inline-flex; align-items: center; gap: 10px; vertical-align: middle; }
.md-source-head input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--md-primary); cursor: pointer; }
.md-source-title { font-weight: 500; }
.md-source-body { display: flex; flex-direction: column; gap: 12px; padding: 12px 0 6px 28px; }

.md-info-icon {
  display: inline-block; margin-left: 6px; text-decoration: none; cursor: help;
  color: var(--md-primary); font-weight: 700;
}
.md-info-icon:hover { color: var(--md-on-primary-container); }

.md-live-results { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-direction: column; gap: 4px; }
.md-live-results li { display: grid; grid-template-columns: 20px 200px 1fr; gap: 10px; align-items: baseline; font-size: .85rem; }
.md-live-mark { font-weight: 700; text-align: center; }
.md-live-ok .md-live-mark { color: var(--md-success); }
.md-live-fail .md-live-mark { color: var(--md-error); }
.md-live-name { font-weight: 500; }
.md-live-detail { color: var(--md-on-surface-variant); overflow-wrap: anywhere; }

.muted { color: var(--md-on-surface-variant); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

@media (max-width: 1279px) {
  .md-container { padding-bottom: calc(112px + env(safe-area-inset-bottom)); }
  .md-footer { padding-bottom: calc(104px + env(safe-area-inset-bottom)); }
}

@media (min-width: 1280px) {
  .md-page-shell {
    display: grid;
    grid-template-columns: minmax(0, 1080px) 240px;
    gap: 24px;
    align-items: start;
    padding: 24px;
  }
  .md-page-shell .md-container {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
  }
  .md-session-panel {
    position: sticky;
    top: 88px;
    left: auto;
    right: auto;
    bottom: auto;
    z-index: 5;
    width: 240px;
    max-height: calc(100vh - 112px);
    max-height: calc(100dvh - 112px);
    margin: 0;
    padding: 16px;
    overflow-y: auto;
  }
  .md-session-summary { align-items: flex-start; min-height: auto; }
  .md-session-heading { flex-wrap: wrap; }
  .md-session-title {
    width: 100%;
    padding: 0 0 8px;
    border-right: 0;
    border-bottom: 1px solid var(--metal-bronze-mid);
  }
  .md-session-state { white-space: normal; }
  .md-session-activity {
    margin-top: 12px;
    overflow: visible;
    white-space: normal;
  }
  .md-session-cancel { width: 100%; }
}

@media (max-width: 420px) {
  .md-session-panel {
    left: max(8px, env(safe-area-inset-left));
    right: max(8px, env(safe-area-inset-right));
    bottom: max(8px, env(safe-area-inset-bottom));
    width: calc(100% - 16px);
    padding: 10px 12px;
  }
  .md-session-title { font-size: .9rem; }
  .md-session-state { font-size: .76rem; }
  .md-session-cancel { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .md-progress.determinate > div { transition: none; }
  .md-progress > div { animation: none; width: 100%; }
}