/* ===========================================================================
   Flussbilanz-Labor (flow-lab.js) — an styles.css anhaengen.
   Nutzt die vorhandenen Tokens; ergaenzt nur die beiden Fluss-Farben.
   =========================================================================== */

:root {
  --flow-fill: #6e7bd9;
  --flow-in: var(--accent);
  --flow-out: var(--warn);
}

.flow-section {
  padding-top: 10px;
}

.flow-panel {
  overflow: hidden;
  border: 1px solid rgba(110, 123, 217, 0.35);
  border-radius: 18px;
  background:
    radial-gradient(circle at 78% 4%, rgba(110, 123, 217, 0.14), transparent 28rem),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

/* --------------------------------------------------------------- Kennzahlen */

.flow-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  padding: 26px 30px 14px;
}

.flow-metric {
  display: grid;
  gap: 7px;
  align-content: start;
}

.flow-metric > span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.flow-metric strong {
  color: var(--flow-fill);
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.flow-metric-target strong {
  color: var(--ok);
}

/* Die Netto-Bilanz traegt eine Einheit und braucht darum weniger Schriftgroesse. */
.flow-metric-compact strong {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.flow-metric small {
  min-height: 1.25rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.35;
}

.flow-metric small[data-tone="ok"] {
  color: var(--ok);
}

.flow-metric small[data-tone="warn"] {
  color: var(--warn);
}

.flow-key {
  display: inline-block;
  width: 11px;
  height: 11px;
  margin-right: 7px;
  border-radius: 3px;
  vertical-align: -1px;
}

.flow-key-fill { background: var(--flow-fill); }
.flow-key-in { background: var(--flow-in); }
.flow-key-out { background: var(--flow-out); }
.flow-key-target { background: var(--ok); }

/* ------------------------------------------- Buehne: Zufluss | Speicher | Entnahme */

.flow-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr) minmax(220px, 300px);
  gap: 18px;
  padding: 8px 30px 4px;
  align-items: center;
}

#flow-connectors {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.flow-path {
  fill: none;
  stroke-linecap: round;
  opacity: 0.28;
}

.flow-path.is-idle {
  stroke-width: 1;
  opacity: 0.12;
}

.flow-path-in { stroke: var(--flow-in); }
.flow-path-out { stroke: var(--flow-out); }

.flow-dash {
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 1 18;
  animation: flow-move 1.2s linear infinite;
}

.flow-dash-in { stroke: var(--flow-in); }
.flow-dash-out { stroke: var(--flow-out); }

@keyframes flow-move {
  to { stroke-dashoffset: -19; }
}

@media (prefers-reduced-motion: reduce) {
  .flow-dash { animation: none; }
}

/* ------------------------------------------------------------------ Regler */

.flow-column {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 12px;
  align-content: center;
}

.flow-column-head {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.flow-column-out .flow-column-head {
  text-align: right;
}

.flow-card {
  display: grid;
  gap: 4px;
  padding: 12px 14px 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.flow-card-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.flow-card label {
  font-size: 0.88rem;
  font-weight: 750;
}

.flow-card-value {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.flow-card small {
  color: var(--muted);
  font-size: 0.74rem;
}

.flow-panel input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 24px;
  margin: 2px 0 0;
  background: transparent;
  cursor: pointer;
}

.flow-panel input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(128, 128, 128, 0.25);
}

.flow-panel input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(128, 128, 128, 0.25);
}

.flow-panel input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -6px;
  border: 2px solid var(--panel-strong);
  border-radius: 50%;
  background: var(--thumb, var(--flow-fill));
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.35);
}

.flow-panel input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 2px solid var(--panel-strong);
  border-radius: 50%;
  background: var(--thumb, var(--flow-fill));
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.35);
}

.flow-panel input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 999px;
}

.flow-column-in input[type="range"] { --thumb: var(--flow-in); }
.flow-column-out input[type="range"] { --thumb: var(--flow-out); }

/* -------------------------------------------------------------- Gasflasche */

.flow-bottle-wrap {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
}

.flow-bottle-wrap svg {
  display: block;
  width: min(100%, 300px);
  height: auto;
}

.flow-bottle-outline {
  fill: var(--panel);
  stroke: var(--norm-line, #66707e);
  stroke-width: 2.5;
}

.flow-bottle-metal {
  fill: #66707e;
  opacity: 0.8;
}

.flow-bottle-surface {
  fill: #aeb6f0;
}

.flow-tick {
  stroke: var(--line);
  stroke-width: 1.5;
}

.flow-tick-label {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.flow-bottle-target {
  stroke: var(--ok);
  stroke-width: 2;
  stroke-dasharray: 7 6;
}

.flow-bottle-target-label {
  fill: var(--ok);
  font-size: 13px;
  font-weight: 850;
}

.flow-bottle-norm {
  stroke: #66707e;
  stroke-width: 1.5;
  stroke-dasharray: 3 4;
}

.flow-bottle-norm-label {
  fill: #66707e;
  font-size: 10.5px;
  font-weight: 700;
}

.flow-bottle-value {
  fill: var(--ink);
  font-size: 42px;
  font-weight: 900;
  letter-spacing: -0.04em;
  /* Halo, damit der Wert auf Fuellung und Hintergrund gleich gut lesbar bleibt. */
  paint-order: stroke;
  stroke: var(--panel-strong);
  stroke-width: 5px;
  stroke-linejoin: round;
}

.flow-bottle-caption {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------- Zeitachse */

.flow-timeline {
  padding: 4px 30px 2px;
  border-top: 1px solid var(--line);
}

.flow-timeline-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 12px 0 2px;
}

.flow-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--accent-strong);
  color: var(--panel-strong);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.flow-button:hover {
  transform: translateY(-2px);
}

.flow-button-ghost {
  width: auto;
  min-width: 96px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 800;
}

.flow-day {
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.flow-day small {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flow-timeline-legend {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

/* ------------------------------------------------------ Szenario-Umschalter */

.flow-scenarios {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
}

.flow-chip {
  padding: 0 15px;
  height: 32px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 800;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.flow-chip:hover {
  color: var(--ink);
}

.flow-chip[aria-pressed="true"] {
  background: var(--accent-strong);
  color: var(--panel-strong);
}

.flow-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.flow-scenario-note {
  margin: 10px 0 4px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.45;
}

.flow-scenario-note strong {
  color: var(--ink);
}

.flow-axis-wrap {
  position: relative;
}

.flow-axis-wrap svg {
  display: block;
  width: 100%;
  height: auto;
}

#flow-scrub {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
}

.flow-axis-week {
  stroke: var(--line);
  stroke-width: 1;
}

.flow-axis-month {
  stroke: var(--muted);
  stroke-width: 1.5;
}

.flow-axis-month.is-target {
  stroke: var(--ok);
}

.flow-axis-label {
  fill: var(--muted);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.flow-axis-target {
  stroke: var(--ok);
  stroke-width: 1.5;
  stroke-dasharray: 7 6;
  opacity: 0.85;
}

.flow-axis-target-text {
  fill: var(--ok);
  font-size: 11.5px;
  font-weight: 800;
}

.flow-axis-curve {
  fill: none;
  stroke: var(--flow-fill);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.flow-axis-cursor {
  stroke: var(--ink);
  stroke-width: 1.5;
  opacity: 0.55;
}

.flow-axis-dot {
  fill: var(--flow-fill);
  stroke: var(--panel-strong);
  stroke-width: 2.5;
}

/* ------------------------------------------- Fuss: Bedarf und Temperatur */

.flow-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 380px);
  gap: 20px 40px;
  align-items: start;
  padding: 16px 30px 20px;
  border-top: 1px solid var(--line);
}

.flow-foot > div > span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.flow-required strong {
  color: var(--flow-in);
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.flow-required strong[data-tone="warn"] { color: var(--warn); }
.flow-required strong[data-tone="ok"] { color: var(--ok); }

.flow-required p,
.flow-temperature p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.flow-temperature-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.flow-temperature-row strong {
  min-width: 4.6ch;
  font-size: 1.3rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  text-align: right;
}

.flow-temperature-row input[type="range"] {
  flex: 1;
  --thumb: var(--flow-out);
}

.flow-temperature-scale {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.flow-source-note {
  padding: 0 30px 24px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.flow-source-note a {
  color: var(--accent-strong);
  font-weight: 800;
}

.flow-source-note strong {
  color: var(--ink);
}

/* ------------------------------------------------------------------ Mobil */

@media (max-width: 900px) {
  .flow-stage {
    grid-template-columns: 1fr;
    padding: 8px 18px 4px;
  }

  #flow-connectors {
    display: none;
  }

  .flow-bottle-wrap {
    order: -1;
  }

  .flow-column-out .flow-column-head {
    text-align: left;
  }

  .flow-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 22px 18px 10px;
  }

  .flow-timeline,
  .flow-foot,
  .flow-source-note {
    padding-left: 18px;
    padding-right: 18px;
  }

  .flow-foot {
    grid-template-columns: 1fr;
  }

  .flow-timeline-legend {
    margin-left: 0;
    width: 100%;
  }

  /* Die Zeitachse behaelt ihre Proportionen und scrollt in ihrem eigenen
     Container, statt auf unleserliche Beschriftungen zusammenzuschrumpfen. */
  .flow-axis-wrap {
    overflow-x: auto;
    overscroll-behavior-x: contain;
  }

  .flow-axis-wrap svg,
  #flow-scrub {
    min-width: 620px;
  }
}

/* ----------------------------------- Geisterlinie: lineare Fortschreibung */

/* Zeigt dieselbe Extrapolation wie das Cockpit-Chart darueber, damit die
   Abweichung der Simulation sichtbar wird statt zu verwirren. */
.flow-axis-linear {
  fill: none;
  stroke: var(--muted);
  stroke-width: 2;
  stroke-dasharray: 5 6;
  stroke-linecap: round;
  opacity: 0.8;
}

.flow-axis-linear-label {
  fill: var(--muted);
  font-size: 11.5px;
  font-weight: 800;
}

.flow-key-linear {
  width: 16px;
  height: 0;
  border-top: 2px dashed var(--muted);
  border-radius: 0;
  background: none;
  vertical-align: 3px;
}

/* ------------------------------------------------------- Belege am Regler */

.flow-card-name {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.flow-info {
  flex: none;
  width: 17px;
  height: 17px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 900;
  font-style: italic;
  line-height: 1;
  cursor: help;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.flow-info:hover,
.flow-info[aria-expanded="true"] {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: var(--panel-strong);
}

.flow-info:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Info-Knopf im SVG der Flasche. Gleiche Rolle wie der HTML-Knopf, aber
   Fuellung statt Hintergrund — background/border greifen in SVG nicht. */
.flow-info-svg {
  cursor: help;
}

.flow-info-svg .flow-info-ring {
  fill: transparent;
  stroke: var(--ok);
  stroke-width: 1.2;
  transition: fill 0.15s ease;
}

.flow-info-svg .flow-info-glyph {
  fill: var(--ok);
  font-size: 10px;
  font-weight: 900;
  font-style: italic;
  pointer-events: none;
}

.flow-info-svg:hover .flow-info-ring,
.flow-info-svg[aria-expanded="true"] .flow-info-ring {
  fill: var(--ok);
}

.flow-info-svg:hover .flow-info-glyph,
.flow-info-svg[aria-expanded="true"] .flow-info-glyph {
  fill: var(--panel-strong);
}

.flow-info-svg:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.flow-temperature > span .flow-info {
  vertical-align: 1px;
  margin-left: 4px;
  text-transform: none;
}

.flow-popover {
  position: fixed;
  z-index: 60;
  padding: 15px 17px 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-strong);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
  color: var(--ink);
  font-size: 0.83rem;
  line-height: 1.5;
}

.flow-popover[hidden] {
  display: none;
}

.flow-popover h4 {
  margin: 0 0 9px;
  font-size: 0.92rem;
  font-weight: 850;
}

.flow-popover p {
  margin: 0 0 9px;
  color: var(--muted);
}

.flow-popover p:last-child {
  margin-bottom: 0;
}

.flow-popover strong {
  color: var(--ink);
  font-weight: 800;
}

.flow-pop-label {
  display: block;
  margin-bottom: 2px;
  color: var(--accent-strong);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flow-pop-quelle {
  padding-top: 9px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
}

.flow-pop-quelle a {
  color: var(--accent-strong);
  font-weight: 800;
}

/* ------------------------------------------------- Referenzjahr statt Regler */

.flow-refyear .flow-scenarios {
  margin: 6px 0 8px;
}

.flow-refyear > p strong {
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 850;
}

.flow-source-note sub {
  font-size: 0.72em;
}

/* --------------------------------------------------------------- Zielpfad */

.flow-axis-goal {
  fill: none;
  stroke: var(--ok);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.85;
}

.flow-axis-goal-label {
  fill: var(--ok);
  font-size: 11.5px;
  font-weight: 800;
}

.flow-key-goal {
  background: var(--ok);
}

/* ------------------------------------------------ Benoetigter Zufluss + Luecke */

.flow-required-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 26px;
  margin: 0;
}

.flow-required-gap {
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.flow-required-gap[data-tone="warn"] { color: var(--warn); }
.flow-required-gap[data-tone="ok"] { color: var(--ok); }

/* Fuenf Gasjahre passen nicht in eine Zeile der schmalen Fussspalte. */
.flow-refyear .flow-scenarios {
  display: flex;
  flex-wrap: wrap;
  max-width: 100%;
}

.flow-refyear .flow-chip {
  padding: 0 12px;
  font-size: 0.8rem;
}

/* --------------------------------- Knopfleiste ohne Szenarien, mit Gasjahren */

.flow-refyear-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  white-space: nowrap;
}

.flow-timeline-controls .flow-scenarios {
  flex-wrap: wrap;
}

.flow-foot-single {
  grid-template-columns: 1fr;
}

/* Hoehere Spezifitaet als ".flow-download span", sonst gewinnt dort das
   flex: 1 1 320px und die Knopfreihe wird auseinandergezogen. */
.flow-download .flow-download-buttons {
  display: flex;
  /* flex: none wuerde die Reihe auf ihre Summenbreite (rund 710 px) nageln und
     unter 640 px die ganze Seite waagerecht ueberlaufen lassen. 0 1 auto plus
     min-width: 0 laesst sie stattdessen umbrechen. */
  flex: 0 1 auto;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
  max-width: 100%;
}

/* Das Methodik-PDF ist ein Link, sieht aber aus wie die beiden Knoepfe daneben. */
.flow-download-buttons .flow-button {
  text-decoration: none;
  white-space: nowrap;
}

.flow-download-buttons a.flow-button {
  display: inline-flex;
  align-items: center;
}

.flow-download {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin: 14px 0 4px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.flow-download span {
  flex: 1 1 320px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.flow-download .flow-button-ghost {
  flex: none;
}