/* CheckDamCal — styles.
   Chrome borrows MyWell's teal and ink so the tool reads as part of the same
   family; data colours are a validated categorical set (see README, "Colour").
   Water is blue, recharge aqua, evaporation orange; spill — the water the dam
   did not keep — takes the recessive grey. Earth tones appear only in the
   dam section drawing. */

@font-face {
  font-family: "Nunito";
  src: url("../fonts/nunito-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Nunito";
  src: url("../fonts/nunito-latin-600-normal.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "Nunito";
  src: url("../fonts/nunito-latin-700-normal.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Nunito";
  src: url("../fonts/nunito-latin-800-normal.woff2") format("woff2");
  font-weight: 800;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f1f5f4;
  --surface: #ffffff;
  --surface-2: #f6f9f8;
  --ink: #102a33;
  --ink-2: #34515a;
  --muted: #5a6d73;
  --rule: #dde6e4;
  --rule-strong: #c3d0ce;
  --accent: #18776f;
  --accent-hover: #12625b;
  --accent-ink: #ffffff;
  --accent-soft: #e1f1ee;
  --focus: #18776f;

  --c-water: #2a78d6;
  --c-rain: #3987e5;
  --c-recharge: #1baf7a;
  --c-evap: #eb6834;
  --c-spill: #7c878c;
  --c-other: #b4bec1;
  --c-storage: #86b6ef;
  --wash: 0.1;

  --grid: #e7edec;
  --axis: #c3d0ce;

  --warn-bg: #fff6de;
  --warn-line: #e0a100;
  --warn-ink: #5e4200;
  --error-bg: #fdeeee;
  --error-line: #d03b3b;
  --error-ink: #8a1c1c;
  --info-bg: #e9f3fb;
  --info-line: #2a78d6;
  --info-ink: #173f6b;

  --earth: #ecdfc9;
  --earth-line: #a78655;
  --stone: #d6cfc3;
  --stone-line: #8f877a;
  --stone-course: #bdb4a6;
  --gauge-face: #ffffff;
  --gauge-mark: #c33a2f;
  --water-fill: rgba(42, 120, 214, 0.28);

  --radius-card: 12px;
  --radius-ctl: 7px;
  --shadow-pop: 0 10px 30px rgba(16, 42, 51, 0.16), 0 1px 3px rgba(16, 42, 51, 0.12);

  --font: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #0b1316;
    --surface: #121c20;
    --surface-2: #17242a;
    --ink: #eaf1f1;
    --ink-2: #c0cdcd;
    --muted: #93a3a6;
    --rule: #22333a;
    --rule-strong: #30454d;
    --accent: #48c3b8;
    --accent-hover: #6fd2c9;
    --accent-ink: #062a27;
    --accent-soft: #15322f;
    --focus: #6fd2c9;
    --c-water: #3987e5;
    --c-rain: #5598e7;
    --c-recharge: #199e70;
    --c-evap: #d95926;
    --c-spill: #8f9ca1;
    --c-other: #4d5b60;
    --c-storage: #2f6cb8;
    --wash: 0.16;
    --grid: #1c2a30;
    --axis: #30454d;
    --warn-bg: #2d2610;
    --warn-line: #fab219;
    --warn-ink: #f4d690;
    --error-bg: #2e1717;
    --error-line: #e66767;
    --error-ink: #f3b8b8;
    --info-bg: #13263a;
    --info-line: #5598e7;
    --info-ink: #c4dcf7;
    --earth: #3a3127;
    --earth-line: #8c7450;
    --stone: #4a4640;
    --stone-line: #6f695f;
    --stone-course: #5c564d;
    --gauge-face: #e6ecec;
    --gauge-mark: #d24a3f;
    --water-fill: rgba(57, 135, 229, 0.34);
    --shadow-pop: 0 10px 30px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0b1316;
  --surface: #121c20;
  --surface-2: #17242a;
  --ink: #eaf1f1;
  --ink-2: #c0cdcd;
  --muted: #93a3a6;
  --rule: #22333a;
  --rule-strong: #30454d;
  --accent: #48c3b8;
  --accent-hover: #6fd2c9;
  --accent-ink: #062a27;
  --accent-soft: #15322f;
  --focus: #6fd2c9;
  --c-water: #3987e5;
  --c-rain: #5598e7;
  --c-recharge: #199e70;
  --c-evap: #d95926;
  --c-spill: #8f9ca1;
  --c-other: #4d5b60;
  --c-storage: #2f6cb8;
  --wash: 0.16;
  --grid: #1c2a30;
  --axis: #30454d;
  --warn-bg: #2d2610;
  --warn-line: #fab219;
  --warn-ink: #f4d690;
  --error-bg: #2e1717;
  --error-line: #e66767;
  --error-ink: #f3b8b8;
  --info-bg: #13263a;
  --info-line: #5598e7;
  --info-ink: #c4dcf7;
  --earth: #3a3127;
  --earth-line: #8c7450;
  --stone: #4a4640;
  --stone-line: #6f695f;
  --stone-course: #5c564d;
  --gauge-face: #e6ecec;
  --gauge-mark: #d24a3f;
  --water-fill: rgba(57, 135, 229, 0.34);
  --shadow-pop: 0 10px 30px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* ------------------------------------------------------------------ base */

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  overflow-x: hidden;
}
h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.25;
}
h2 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
h3 {
  font-size: 16px;
  font-weight: 700;
}
p {
  margin: 0;
}
a {
  color: var(--accent);
}
code,
.mono {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}
.num,
.tnum {
  font-variant-numeric: tabular-nums;
}
[hidden] {
  display: none !important;
}
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  background: var(--surface);
  color: var(--ink);
  padding: 8px 12px;
  border-radius: var(--radius-ctl);
  z-index: 50;
}
.skip-link:focus {
  top: 8px;
}
/* Horizontal padding only: a shorthand here would cancel main's vertical padding. */
.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}
@media (min-width: 720px) {
  .wrap {
    padding-left: 24px;
    padding-right: 24px;
  }
}

/* ---------------------------------------------------------------- header */

.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
  position: relative;
  z-index: 20;
}
/* Sticky only where there is room for it; on a phone it would cover a third of the screen. */
@media (min-width: 720px) and (min-height: 560px) {
  .app-header {
    position: sticky;
    top: 0;
  }
}
@media (max-width: 719px) {
  .brand-mark {
    width: 26px;
    height: 26px;
  }
  .brand-name {
    font-size: 17px;
  }
  .header-actions .btn {
    font-size: 13.5px;
    padding: 6px 10px;
  }
  .site {
    order: 3;
    flex-basis: 100%;
  }
  .site-label {
    display: none;
  }
  .site-input {
    padding-left: 0;
  }
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 12px 20px;
  padding-top: 12px;
  padding-bottom: 8px;
  flex-wrap: wrap;
}
@media (max-width: 719px) {
  .header-inner {
    gap: 8px 10px;
  }
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex: none;
}
.brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
}
.brand-name {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
}
.site {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 220px;
  min-width: 0;
}
.site-label {
  color: var(--muted);
  font-size: 13px;
}
.site-input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-weight: 700;
  color: var(--ink);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-ctl);
  padding: 5px 8px;
}
.site-input:hover {
  border-color: var(--rule);
}
.site-input:focus {
  border-color: var(--accent);
  background: var(--surface);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-left: auto;
}

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar {
  display: none;
}
.tab {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  color: var(--muted);
  padding: 10px 12px 11px;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tab:hover {
  color: var(--ink-2);
}
.tab[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.tab-badge {
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--error-line);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  line-height: 18px;
  text-align: center;
}
.tab-badge.warn {
  background: var(--warn-line);
  color: #2b1d00;
}

.status-bar {
  background: var(--surface-2);
  border-bottom: 1px solid var(--rule);
  font-size: 13.5px;
  color: var(--ink-2);
}
.status-bar .wrap {
  padding-top: 7px;
  padding-bottom: 7px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  align-items: baseline;
}
.status-item strong {
  color: var(--ink);
  font-weight: 700;
}
.status-error {
  color: var(--error-ink);
  font-weight: 700;
}
.status-error a {
  color: inherit;
}

/* --------------------------------------------------------------- buttons */

.btn {
  appearance: none;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  padding: 7px 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.3;
}
.btn:hover {
  border-color: var(--ink-2);
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-ghost {
  border-color: transparent;
  background: transparent;
  color: var(--ink-2);
}
.btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--rule);
}
.btn-sm {
  font-size: 13px;
  padding: 4px 9px;
}
.btn-link {
  appearance: none;
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  color: var(--accent);
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.menu {
  position: relative;
}
.menu > summary {
  list-style: none;
}
.menu > summary::-webkit-details-marker {
  display: none;
}
.menu-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 30;
  min-width: 250px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 10px;
  box-shadow: var(--shadow-pop);
  padding: 6px;
  display: grid;
}
.menu-panel button {
  appearance: none;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  text-align: left;
  color: var(--ink);
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
}
.menu-panel button:hover,
.menu-panel button:focus-visible {
  background: var(--surface-2);
}
.menu-panel hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 5px 4px;
}
.menu-theme {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 13px;
  color: var(--muted);
}
.seg {
  display: inline-flex;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  overflow: hidden;
}
.seg button {
  padding: 4px 9px !important;
  border-radius: 0 !important;
  font-size: 13px !important;
}
.seg button[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--ink);
  font-weight: 700;
}

/* ------------------------------------------------------------------ main */

main {
  padding-top: 24px;
  padding-bottom: 48px;
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 16px;
}
.panel-head p {
  color: var(--ink-2);
  max-width: 68ch;
  margin-top: 6px;
}
.panel-sub {
  color: var(--muted);
  font-size: 14px;
}
.stack {
  display: grid;
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: 18px;
  min-width: 0;
}
@media (min-width: 720px) {
  .card {
    padding: 22px;
  }
}
.card-head {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}
.card-head p {
  color: var(--muted);
  font-size: 14px;
}
.card > p + p {
  margin-top: 8px;
}
.grid-2 {
  display: grid;
  gap: 16px;
}
@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* --------------------------------------------------------------- notices */

.notice {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--info-line);
  border-left-width: 4px;
  background: var(--info-bg);
  color: var(--info-ink);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
}
.notice.warn {
  border-color: var(--warn-line);
  background: var(--warn-bg);
  color: var(--warn-ink);
}
.notice.error {
  border-color: var(--error-line);
  background: var(--error-bg);
  color: var(--error-ink);
}
.notice-icon {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 1px;
}
.notice-body {
  flex: 1;
  min-width: 0;
}
.notice-body strong {
  font-weight: 800;
}
.notice ul {
  margin: 4px 0 0;
  padding-left: 18px;
}
.notice-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.notice-close {
  flex: none;
  appearance: none;
  border: 0;
  background: none;
  color: inherit;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  opacity: 0.7;
}
.notices {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}
.notices:empty {
  display: none;
}

/* ------------------------------------------------------------ hero block */

.hero {
  display: grid;
  gap: 16px;
}
@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(300px, 5fr) 7fr;
  }
}
.hero-figure-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-2);
}
.hero-figure {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 2px 0 4px;
}
.hero-figure .unit {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-2);
  margin-left: 4px;
}
.hero-sentence {
  color: var(--ink-2);
  max-width: 44ch;
}
.partition {
  display: flex;
  gap: 2px;
  height: 16px;
  margin: 18px 0 12px;
}
.partition span {
  display: block;
  height: 100%;
  min-width: 2px;
  background: var(--c);
}
.partition span:first-child {
  border-radius: 4px 0 0 4px;
}
.partition span:last-child {
  border-radius: 0 4px 4px 0;
}
.partition span:only-child {
  border-radius: 4px;
}
.split-list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.split-list li {
  display: grid;
  grid-template-columns: 12px 1fr auto auto;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}
.split-key {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--c);
  align-self: center;
}
.split-list .v {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.split-list .p {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 48px;
  text-align: right;
}
.split-note {
  color: var(--muted);
  font-size: 13px;
  margin-top: 10px;
}

.section-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.section-host {
  width: 100%;
  min-height: 200px;
}
.section-svg {
  display: block;
  width: 100%;
  height: auto;
}
.scrubber {
  display: flex;
  align-items: center;
  gap: 10px;
}
.scrubber input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  min-width: 0;
}
.day-readout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px 16px;
  margin: 0;
}
.day-readout div {
  min-width: 0;
}
.day-readout dt {
  font-size: 12.5px;
  color: var(--muted);
}
.day-readout dd {
  margin: 0;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.day-date {
  font-weight: 800;
}

/* dam section drawing */
.sec-earth {
  fill: var(--earth);
}
.sec-bed {
  fill: none;
  stroke: var(--earth-line);
  stroke-width: 1.5;
  stroke-linejoin: round;
}
.sec-dam {
  fill: var(--stone);
  stroke: var(--stone-line);
  stroke-width: 1;
}
.sec-course line {
  stroke: var(--stone-course);
  stroke-width: 1;
}
.sec-crest {
  stroke: var(--stone-line);
  stroke-width: 2;
}
.sec-water {
  fill: var(--water-fill);
}
.sec-surface {
  stroke: var(--c-water);
  stroke-width: 2;
  stroke-linecap: round;
}
.sec-nappe {
  fill: none;
  stroke: var(--c-water);
  stroke-width: 3;
  stroke-linecap: round;
}
.sec-gauge {
  fill: var(--gauge-face);
  stroke: var(--stone-line);
  stroke-width: 1;
}
.sec-gauge-mark rect {
  fill: var(--gauge-mark);
}
.sec-scale line {
  stroke: var(--muted);
}
.sec-tick {
  font-size: 11px;
  fill: var(--muted);
  font-variant-numeric: tabular-nums;
}
.sec-pointer {
  fill: var(--ink);
}
.sec-label {
  font-size: 12.5px;
  fill: var(--ink-2);
  font-weight: 600;
}
.sec-tick,
.sec-label {
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 3px;
  stroke-linejoin: round;
}
.sec-label-strong {
  fill: var(--ink);
  font-weight: 800;
}
.sec-label-muted {
  fill: var(--muted);
  font-weight: 600;
}

/* ------------------------------------------------------------------ KPIs */

/* Hairlines drawn by each tile (right + bottom), clipped by the container,
   so a short last row leaves plain surface rather than a grey block. */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.kpi {
  padding: 14px 16px;
  min-width: 0;
  box-shadow:
    1px 0 0 var(--rule),
    0 1px 0 var(--rule);
}
.kpi-label {
  font-size: 13px;
  color: var(--muted);
}
.kpi-value {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.25;
  margin-top: 2px;
}
.kpi-value .unit {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-2);
  margin-left: 3px;
}
.kpi-note {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 2px;
}

/* ---------------------------------------------------------------- charts */

.chart-stack {
  display: grid;
  gap: 6px;
}
.chart-stack .chart + .chart {
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}
.chart {
  min-width: 0;
}
.chart-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.chart-heading {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  min-width: 0;
}
.chart-title {
  font-size: 15px;
  font-weight: 700;
}
.chart-unit {
  font-size: 13px;
  color: var(--muted);
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 13px;
  color: var(--ink-2);
  margin: 4px 0 2px;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.legend-key {
  display: inline-block;
  flex: none;
}
.legend-key-line {
  width: 14px;
  height: 2px;
  border-radius: 1px;
  background: var(--key);
}
.legend-key-rect {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--key);
}
.legend-key-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--key);
}
.chart-body {
  position: relative;
  width: 100%;
  touch-action: pan-y;
}
.chart-body:focus-visible {
  outline-offset: 4px;
  border-radius: 4px;
}
.chart-svg {
  display: block;
  overflow: visible;
}
.chart-note {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 4px;
}
.grid-line {
  stroke: var(--grid);
  stroke-width: 1;
  shape-rendering: crispEdges;
}
.axis-line {
  stroke: var(--axis);
  stroke-width: 1;
  shape-rendering: crispEdges;
}
.tick {
  font-size: 11.5px;
  fill: var(--muted);
  font-variant-numeric: tabular-nums;
}
.axis-title {
  font-weight: 600;
}
.ref-line {
  stroke: var(--ink-2);
  stroke-width: 1;
  opacity: 0.55;
  shape-rendering: crispEdges;
}
.ref-label {
  font-size: 12px;
  fill: var(--ink-2);
  font-weight: 600;
  /* A halo in the surface colour keeps the label legible where it crosses data. */
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 4px;
  stroke-linejoin: round;
}
.end-label {
  font-size: 12.5px;
  fill: var(--ink);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.label-key {
  stroke: var(--c);
  stroke-width: 2;
  stroke-linecap: round;
}
.leader {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1;
}
.line {
  fill: none;
  stroke: var(--c);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.area {
  fill: var(--c);
  opacity: var(--wash);
}
.bar {
  fill: var(--c);
}
.bars .bar:hover {
  opacity: 0.8;
}
.fit {
  stroke: var(--c);
  stroke-width: 2.5;
  stroke-linecap: round;
}
.dot {
  fill: var(--c);
  stroke: var(--surface);
  stroke-width: 2;
}
.dot.hollow {
  fill: var(--surface);
  stroke: var(--c);
  stroke-width: 2;
}
.faded {
  opacity: 0.28;
}
.hit {
  fill: transparent;
  cursor: crosshair;
}
.cross-line {
  stroke: var(--ink-2);
  stroke-width: 1;
  opacity: 0.6;
  shape-rendering: crispEdges;
}
.cross-dot {
  fill: var(--c);
  stroke: var(--surface);
  stroke-width: 2;
}
.cross-ring {
  fill: none;
  stroke: var(--c);
  stroke-width: 2;
}
.chart-tooltip {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  box-shadow: var(--shadow-pop);
  padding: 8px 10px;
  font-size: 13px;
  min-width: 150px;
  max-width: 280px;
}
.tt-head {
  font-weight: 800;
  margin-bottom: 4px;
}
.tt-row {
  display: grid;
  grid-template-columns: 14px auto 1fr;
  gap: 8px;
  align-items: baseline;
  line-height: 1.5;
}
.tt-key {
  align-self: center;
  justify-self: center;
}
.tt-key-line {
  width: 12px;
  height: 2px;
  background: var(--key);
  border-radius: 1px;
}
.tt-key-rect {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--key);
}
.tt-key-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--key);
}
.tt-value {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tt-label {
  color: var(--muted);
}

/* --------------------------------------------------------------- tables */

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}
.table-scroll.tall {
  max-height: 560px;
  overflow-y: auto;
  border: 1px solid var(--rule);
  border-radius: 10px;
}
.data-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
}
.data-table th,
.data-table td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: baseline;
  white-space: nowrap;
}
.data-table th {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-2);
  background: var(--surface-2);
  position: sticky;
  top: 0;
  z-index: 1;
  white-space: normal;
  vertical-align: bottom;
  line-height: 1.3;
}
.data-table .num {
  text-align: right;
}
.data-table tbody tr:hover td {
  background: var(--surface-2);
}
.data-table tfoot td {
  font-weight: 800;
  border-top: 2px solid var(--rule-strong);
  border-bottom: 0;
}
.data-table tr.selected td {
  background: var(--accent-soft);
}
.data-table tr.clickable {
  cursor: pointer;
}
.delta-up {
  color: var(--ink);
}
.muted {
  color: var(--muted);
}

/* ----------------------------------------------------------------- forms */

.form-grid {
  display: grid;
  gap: 14px 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.field {
  display: grid;
  gap: 4px;
  align-content: start;
  min-width: 0;
}
.field label,
.field .label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
}
.field .help {
  font-size: 12.5px;
  color: var(--muted);
}
.input-unit {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-ctl);
  background: var(--surface);
  overflow: hidden;
}
.input-unit:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input-unit input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
}
.input-unit .u {
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-size: 13px;
  color: var(--muted);
  background: var(--surface-2);
  border-left: 1px solid var(--rule);
  white-space: nowrap;
}
input[type="text"],
input[type="number"],
input[type="date"],
input:not([type]),
select {
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  padding: 7px 10px;
  border-radius: var(--radius-ctl);
  border: 1px solid var(--rule-strong);
  background: var(--surface);
  font-variant-numeric: tabular-nums;
  min-width: 0;
}
.input-unit input {
  border-radius: 0;
}
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input-unit input:focus {
  box-shadow: none;
}
input.invalid,
.input-unit.invalid {
  border-color: var(--error-line) !important;
  background: var(--error-bg);
}
.field-error {
  font-size: 12.5px;
  color: var(--error-ink);
  font-weight: 700;
}
fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}
legend {
  padding: 0;
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 6px;
}
.choice {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  padding: 3px 0;
  cursor: pointer;
}
.choice input {
  margin-top: 4px;
  accent-color: var(--accent);
}
.choice .help {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
}
.inline-input {
  display: inline-flex;
  margin-top: 6px;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  padding: 2px 4px 2px 6px;
  background: var(--surface);
}
.chip input {
  border: 0;
  padding: 2px 4px;
  font-size: 13.5px;
}
.chip input:focus {
  box-shadow: none;
}
.chip button {
  appearance: none;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 0 4px;
}

/* ------------------------------------------------------------ edit grids */

.edit-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.edit-table th {
  text-align: left;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-2);
  padding: 6px 6px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 1;
  white-space: nowrap;
}
.edit-table td {
  padding: 2px 4px;
  border-bottom: 1px solid var(--rule);
  vertical-align: middle;
}
.edit-table input {
  width: 100%;
  border-color: transparent;
  background: transparent;
  padding: 5px 6px;
  font-size: 14px;
}
.edit-table input:hover {
  border-color: var(--rule);
}
.edit-table input:focus {
  border-color: var(--accent);
  background: var(--surface);
}
.edit-table td.derived {
  color: var(--ink-2);
  padding: 2px 10px;
  white-space: nowrap;
}
.edit-table td.derived.num,
.edit-table th.num {
  text-align: right;
}
.edit-table .row-del {
  appearance: none;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 6px;
}
.edit-table .row-del:hover {
  color: var(--error-ink);
  background: var(--error-bg);
}
.edit-table tr.flag-warn td {
  background: var(--warn-bg);
}
.edit-table tr.flag-override td:first-child {
  box-shadow: inset 3px 0 0 var(--c-water);
}
.edit-table tr.flag-interp td:first-child {
  box-shadow: inset 3px 0 0 var(--c-other);
}
.row-note {
  font-size: 12.5px;
  color: var(--muted);
  white-space: normal;
  min-width: 160px;
}
.row-note .btn-link {
  font-size: 12.5px;
}
.col-date {
  width: 140px;
}
.col-num {
  width: 96px;
}
.edit-table th.col-num {
  white-space: normal;
  line-height: 1.25;
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}
.toolbar .spacer {
  flex: 1;
}
.toolbar-note {
  font-size: 13px;
  color: var(--muted);
}

/* ---------------------------------------------------------- checks list */

.checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.checks li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
}
.checks .notice-icon {
  margin-top: 2px;
}
.check-ok {
  color: var(--ink-2);
  font-size: 14px;
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ------------------------------------------------------------- estimates */

.estimates {
  display: grid;
  gap: 10px;
  margin: 0;
}
.estimate {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr;
  gap: 4px 14px;
  align-items: center;
}
@media (max-width: 560px) {
  .estimate {
    grid-template-columns: 1fr;
  }
}
.estimate dt {
  font-size: 13.5px;
  color: var(--ink-2);
}
.estimate dt small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}
.estimate dd {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.est-bar {
  height: 14px;
  border-radius: 0 4px 4px 0;
  background: var(--c);
  min-width: 2px;
}
.est-value {
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------------------------------------------------------------- method */

.prose > h3,
.prose > p,
.prose > ul,
.prose > ol,
.prose > .formula {
  max-width: 76ch;
}
.prose h3 {
  margin: 26px 0 8px;
  font-size: 18px;
}
.prose h3:first-child {
  margin-top: 0;
}
.prose p,
.prose ul,
.prose ol {
  margin: 0 0 10px;
}
.prose ul,
.prose ol {
  padding-left: 22px;
}
.prose li + li {
  margin-top: 4px;
}
.formula {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  background: var(--surface-2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 6px 0 12px;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.6;
}
.diff-table td {
  white-space: normal;
  min-width: 180px;
  line-height: 1.45;
}
.diff-table td:first-child {
  font-weight: 700;
}

/* ---------------------------------------------------------------- dialog */

dialog {
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px;
  max-width: min(480px, calc(100vw - 32px));
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-pop);
}
dialog::backdrop {
  background: rgba(8, 20, 24, 0.45);
}
dialog h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
dialog p {
  color: var(--ink-2);
}
dialog textarea {
  width: 100%;
  min-height: 180px;
  font: 13px ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  padding: 8px;
  background: var(--surface);
  color: var(--ink);
  margin-top: 10px;
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
}

.app-footer {
  color: var(--muted);
  font-size: 13px;
  padding-bottom: 32px;
}
.app-footer p + p {
  margin-top: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}
@media print {
  .app-header,
  .status-bar,
  .chart-table-toggle,
  .scrubber,
  .toolbar {
    display: none !important;
  }
  body {
    background: #fff;
  }
  .card {
    break-inside: avoid;
  }
}

/* ============================================================ guided steps */

/* Easy shows the essentials; Advanced adds every setting and table. */
:root[data-mode="easy"] .adv {
  display: none !important;
}
:root[data-mode="advanced"] .easy-only {
  display: none !important;
}

.mode-switch button {
  font-weight: 700 !important;
}
@media (max-width: 719px) {
  .mode-switch button {
    padding: 5px 8px !important;
  }
}

.steps {
  gap: 2px;
}
.step {
  gap: 8px;
}
.step-n {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--rule-strong);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  line-height: 19px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.step[data-state="done"] .step-n {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.step[data-state="check"] .step-n {
  background: var(--warn-bg);
  border-color: var(--warn-line);
  color: var(--warn-ink);
}
.step[data-state="problem"] .step-n {
  background: var(--error-bg);
  border-color: var(--error-line);
  color: var(--error-ink);
}
.step[aria-selected="true"] .step-n {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.step-ref {
  color: var(--muted);
  font-weight: 600;
}
@media (min-width: 1100px) {
  .step-ref {
    margin-left: auto;
  }
}

/* Status bar as "what to do next" */
.status-next {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: baseline;
}
.status-next strong {
  color: var(--ink);
}
.status-next .btn-link {
  font-size: inherit;
}
.status-ok::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 800;
}

/* Step head and foot */
.step-head {
  margin-bottom: 18px;
  display: grid;
  gap: 8px;
  max-width: 78ch;
}
.step-kicker {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent);
}
.step-head h2 {
  font-size: 28px;
}
.step-why {
  font-size: 16px;
  color: var(--ink-2);
}
.step-need {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.step-need strong {
  color: var(--ink);
}
.step-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}
.step-foot .btn {
  padding: 10px 16px;
  font-size: 15px;
}
.step-foot .spacer {
  flex: 1;
}

/* Step 1: fields beside the diagram */
.dam-layout {
  display: grid;
  gap: 18px;
  align-items: start;
}
@media (min-width: 960px) {
  .dam-layout {
    grid-template-columns: 1fr 1fr;
  }
}
.field-stack {
  display: grid;
  gap: 16px;
}
.field .why-inline {
  font-size: 12.5px;
  color: var(--muted);
}
.diagram-caption {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 6px;
}

/* Start page */
.start-hero {
  display: grid;
  gap: 10px;
  max-width: 72ch;
  margin-bottom: 18px;
}
.start-hero h2 {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.start-hero p {
  font-size: 16.5px;
  color: var(--ink-2);
}
.explainer-host {
  width: 100%;
  min-height: 260px;
}
.sec-groundwater {
  fill: var(--c-water);
  opacity: 0.1;
}
.sec-rain line {
  stroke: var(--c-rain);
  stroke-width: 2;
  stroke-linecap: round;
}
.sec-arrow {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
}
.sec-arrow-in {
  stroke: var(--c-water);
}
.sec-arrow-evap {
  stroke: var(--c-evap);
}
.sec-arrow-rech {
  stroke: var(--c-recharge);
}
.sec-arrow-spill {
  stroke: var(--c-spill);
}
.order-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: order;
}
.order-list > li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px 14px;
  align-items: start;
}
.order-list > li::before {
  counter-increment: order;
  content: counter(order);
  grid-row: span 3;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
  text-align: center;
  line-height: 30px;
}
.order-list h4 {
  font-size: 16px;
  font-weight: 800;
}
.order-list .when {
  font-weight: 600;
  color: var(--muted);
  font-size: 13.5px;
}
.order-list p {
  color: var(--ink-2);
  font-size: 14.5px;
}
.order-list .why {
  color: var(--ink-2);
  font-size: 14px;
}
.order-list .why strong {
  color: var(--ink);
}
.get-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
@media (min-width: 560px) {
  .get-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.get-item {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--surface);
}
.get-item h4 {
  font-size: 14.5px;
  font-weight: 800;
  display: flex;
  gap: 8px;
  align-items: center;
}
.get-item .key {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--c);
  flex: none;
}
.get-item p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 4px;
}
.get-item .ex {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}
.start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}
.start-actions .btn {
  padding: 11px 16px;
  font-size: 15px;
}

/* Results: plain-language reading of the numbers */
.per100 {
  font-size: 15px;
  color: var(--ink-2);
  margin-top: 14px;
}
.per100 strong {
  color: var(--ink);
}
.howto {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.howto li {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 14.5px;
  color: var(--ink-2);
}
.howto .key {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--c);
  transform: translateY(1px);
}
.howto strong {
  color: var(--ink);
}


/* ================================================================ learn */

.learn-card {
  display: grid;
  gap: 16px;
}
.learn-daybar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.learn-daybar .label {
  font-weight: 700;
  font-size: 14px;
  margin-right: 4px;
}
.learn-day-select {
  font: inherit;
  font-size: 14.5px;
  padding: 6px 10px;
  border-radius: var(--radius-ctl);
  border: 1px solid var(--rule-strong);
  background: var(--surface);
  color: var(--ink);
}
.learn-picks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-left: 6px;
}
.learn-nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  border-bottom: 1px solid var(--rule);
  scrollbar-width: none;
}
.learn-nav::-webkit-scrollbar {
  display: none;
}
.learn-tab {
  appearance: none;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  padding: 8px 10px 10px;
  border-bottom: 3px solid transparent;
  display: inline-flex;
  gap: 7px;
  align-items: center;
  white-space: nowrap;
  cursor: pointer;
}
.learn-tab[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.learn-tab[aria-selected="true"] .step-n {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.learn-lesson {
  display: grid;
  gap: 12px;
}
.learn-kicker {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}
.learn-title {
  font-size: 22px;
  font-weight: 800;
}
.learn-intro {
  color: var(--ink-2);
  max-width: 78ch;
  font-size: 15.5px;
}
.learn-extras {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.learn-toggle button {
  padding: 5px 12px !important;
}
.learn-stage {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px;
  background: var(--surface-2);
  display: grid;
  gap: 10px;
}
.learn-visual {
  background: var(--surface);
  border-radius: 8px;
  min-height: 200px;
  display: grid;
  gap: 8px;
  padding: 8px;
}
.learn-visual:focus-visible {
  outline-offset: 3px;
}
.learn-svg {
  display: block;
  width: 100%;
  height: auto;
}
.learn-section-host {
  width: 100%;
}
.learn-caption {
  font-size: 16px;
  color: var(--ink);
  min-height: 3em;
  max-width: 80ch;
}
.learn-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}
.learn-controls .spacer {
  flex: 1;
}
.learn-counter {
  font-size: 13.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 48px;
  text-align: center;
}
.learn-chart {
  min-width: 0;
}
.learn-in-bar {
  font-size: 12.5px;
  font-weight: 700;
  fill: #fff;
  paint-order: stroke;
  stroke: rgba(0, 0, 0, 0.25);
  stroke-width: 2px;
}
.learn-in-bar.on-light {
  fill: var(--ink);
  stroke: none;
}
.learn-bracket {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
}
.learn-curve {
  fill: none;
  stroke: var(--c-water);
  stroke-width: 1.5;
  opacity: 0.5;
}
.learn-segment {
  stroke: var(--accent);
  stroke-width: 4;
  stroke-linecap: round;
}
.learn-guide {
  stroke: var(--ink-2);
  stroke-width: 1;
  opacity: 0.7;
}
.sec-prev {
  stroke: var(--ink-2);
  stroke-width: 1.5;
  opacity: 0.6;
}
.enter {
  animation: learn-enter 0.45s ease-out both;
}
@keyframes learn-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .enter {
    animation: none;
  }
}

/* The equation, three ways */
.learn-eq-title {
  font-size: 16px;
  font-weight: 800;
  margin-top: 6px;
}
.eq-box {
  display: grid;
  gap: 10px;
}
.eq {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 12px;
  align-items: start;
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--surface);
}
.eq-main {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.eq-key {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--c);
  margin-top: 5px;
}
.eq-key.blank {
  background: transparent;
}
.eq-lines {
  display: grid;
  gap: 4px;
  min-width: 0;
}
.eq-lines > div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 10px;
  align-items: baseline;
}
.eq-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}
.eq-words {
  font-size: 14.5px;
  color: var(--ink);
}
.eq-lines code {
  font-family: "Cambria Math", "STIX Two Math", Cambria, "Times New Roman", serif;
  font-size: 16px;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.eq-numbers code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
}
.eq-note {
  font-size: 13.5px;
  color: var(--muted);
  max-width: 80ch;
}
@media (max-width: 560px) {
  .eq-lines > div {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

/* Data formats */
.format-grid {
  display: grid;
  gap: 14px;
}
@media (min-width: 900px) {
  .format-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.format-item h4 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 6px;
}
.format-item p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-bottom: 8px;
}
.format-item .data-table {
  font-size: 12.5px;
}
.format-item .data-table th,
.format-item .data-table td {
  padding: 4px 8px;
}
.downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.downloads a.btn {
  text-decoration: none;
}
.learn-link {
  font-size: 14px;
  font-weight: 700;
}

.learn-small-parts {
  font-size: 13px;
  color: var(--muted);
  margin: 2px 0 0 4px;
}

/* ------------------------------------------------------- start: two ways in */

.ways {
  display: grid;
  gap: 16px;
  margin-bottom: 18px;
}
@media (min-width: 900px) {
  .ways {
    grid-template-columns: 7fr 5fr;
  }
}
.way {
  border-radius: var(--radius-card);
  padding: 20px;
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
}
@media (min-width: 720px) {
  .way {
    padding: 24px;
  }
}
.way h3 {
  font-size: 20px;
  line-height: 1.25;
}
.way p {
  color: var(--ink-2);
  font-size: 15px;
}
.way-file {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.way-steps {
  background: var(--surface);
  border: 1px solid var(--rule);
}
.drop-zone {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  justify-content: center;
  padding: 22px 16px;
  border: 2px dashed color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 10px;
  background: var(--surface);
  transition: background-color 0.15s, border-color 0.15s;
}
.drop-hint {
  color: var(--ink-2);
  font-weight: 600;
}
body.dragging .drop-zone {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
}
.way-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.way .way-foot {
  font-size: 14px;
  color: var(--muted);
}
.way-foot a {
  color: var(--accent);
  font-weight: 700;
}
@media (prefers-reduced-motion: reduce) {
  .drop-zone {
    transition: none;
  }
}

/* The report tab's marker is a small document, not a number. */
.step-icon svg {
  width: 12px;
  height: 12px;
  margin-top: 3px;
}

/* ------------------------------------------------------------------ report */

.report-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  margin-bottom: 16px;
}
.report-actions-note {
  font-size: 13.5px;
  flex: 1 1 260px;
}
.report-empty ul {
  margin: 8px 0 14px;
  padding-left: 20px;
  display: grid;
  gap: 4px;
}
/* What the PDF says, set like its first page: one sheet, quiet type. */
.report-sheet {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 22px 18px;
  max-width: 860px;
}
@media (min-width: 720px) {
  .report-sheet {
    padding: 40px 48px 44px;
  }
}
.rs-kicker {
  color: var(--accent);
  font-weight: 800;
  font-size: 14px;
}
.rs-title {
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-top: 4px;
}
.rs-meta {
  color: var(--ink-2);
  margin-top: 6px;
}
.rs-source {
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 2px;
}
.rs-headline {
  background: var(--accent-soft);
  padding: 16px 18px;
  margin: 18px 0 8px;
}
.rs-big {
  font-size: clamp(30px, 5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.rs-big .unit {
  font-size: 0.55em;
  margin-left: 4px;
}
.rs-headline p:last-child {
  color: var(--ink-2);
  margin-top: 4px;
}
.report-sheet h4 {
  font-size: 16px;
  margin: 22px 0 8px;
}
.rs-split .partition {
  margin-top: 4px;
}
.rs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.rs-table th,
.rs-table td {
  border-bottom: 1px solid var(--rule);
  padding: 7px 0;
  vertical-align: top;
  text-align: left;
}
.rs-table th {
  font-weight: 600;
  padding-right: 12px;
}
.rs-table td.num {
  font-weight: 800;
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  padding-right: 14px;
}
.rs-note {
  color: var(--muted);
  font-size: 13px;
}
@media (max-width: 600px) {
  /* A narrow screen: the note moves under its label and value. */
  .rs-table tr {
    display: grid;
    grid-template-columns: 1fr auto;
    border-bottom: 1px solid var(--rule);
    padding: 7px 0;
  }
  .rs-table th,
  .rs-table td {
    border: 0;
    padding: 0;
  }
  .rs-table td.num {
    padding-right: 0;
  }
  .rs-table td.rs-note {
    grid-column: 1 / -1;
    padding-top: 2px;
  }
}
.rs-checks {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
  color: var(--ink-2);
  font-size: 14px;
}

/* ------------------------------------------------- embedded in OurWater */

/* The app shows its own title and theme; the calculator keeps its steps. */
.embed .brand,
.embed .menu-theme,
.embed .menu-panel hr:has(+ .menu-theme) {
  display: none;
}
/* Focus mode: the host page owns the steps, the buttons and the scrolling,
   so this document is just the current panel with no chrome of its own. */
.focus .app-header,
.focus .app-footer,
.focus .status-bar,
.focus .step-foot,
.focus .report-actions,
.focus .step-kicker {
  display: none;
}
.focus body {
  background: transparent;
}
/* Focus mode shows just the form unless the host turns explanations on
   (message "explain"): no why / you'll-need text, lesson links, help lines,
   tips, diagrams, survey charts, checks card, or info and warning notices.
   Errors stay, and so do notes about the data itself (.notice-keep: what was
   loaded, which rain gauge, how many days have rain). */
.focus:not(.explain) :is(.step-why, .step-need, .learn-link, .field .help, .choice .help, .diagram-caption, p.toolbar-note, .card p.muted),
.focus:not(.explain) .notice:not(.error):not(.notice-keep),
.focus:not(.explain) .dam-layout > :nth-child(2),
.focus:not(.explain) #panel-survey .grid-2 > :nth-child(2),
.focus:not(.explain) #panel-readings .stack > .card:first-child {
  display: none;
}
.focus:not(.explain) .dam-layout,
.focus:not(.explain) #panel-survey .grid-2 {
  grid-template-columns: minmax(0, 560px);
}
.focus main {
  padding-top: 4px;
  padding-bottom: 8px;
}