/* Water — one page about one house's water.
   Light and dark both, following the machine. Nothing here is the wall's
   business: the hall has its own app and its own look. */

:root {
  --bg:        #f6f7f8;
  --card:      #ffffff;
  --ink:       #14181c;
  --quiet:     #6b7680;
  --line:      #e3e7ea;
  --blue:      #2f7fd1;
  --blue-soft: #cfe3f6;
  --ok:        #3a9b62;
  --warn:      #c98a12;
  --alarm:     #c8442e;
  --radius:    14px;
  --shadow:    0 1px 2px rgba(20, 24, 28, .06), 0 4px 16px rgba(20, 24, 28, .04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #14181c;
    --card:      #1c2126;
    --ink:       #e8ecef;
    --quiet:     #949ea7;
    --line:      #2a3138;
    --blue:      #6fb0ea;
    --blue-soft: #24384c;
    --ok:        #5cbb84;
    --warn:      #e0aa3c;
    --alarm:     #e8705a;
    --shadow:    none;
  }
}

* { box-sizing: border-box; }

/* `display` set by an id selector outbids the browser's own rule for [hidden],
   so hiding a panel by setting .hidden did nothing at all. */
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 16px 48px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 760px; margin: 0 auto; }

header { padding: 28px 4px 8px; }
h1 { margin: 0; font-size: 28px; letter-spacing: -.02em; }
h2 { margin: 0 0 14px; font-size: 15px; font-weight: 600; color: var(--quiet);
     text-transform: uppercase; letter-spacing: .06em; }
h3 { margin: 22px 0 8px; font-size: 14px; font-weight: 600; color: var(--quiet); }
h3:first-of-type { margin-top: 6px; }

.when { margin: 4px 0 0; color: var(--quiet); font-size: 14px; }
.when.stale { color: var(--warn); }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 16px 0;
}

/* ------------------------------- alerts ------------------------------- */

#alerts { margin: 16px 0 0; display: grid; gap: 8px; }
.alert {
  border-radius: 10px; padding: 12px 14px; font-size: 15px;
  border-left: 4px solid var(--quiet); background: var(--card); box-shadow: var(--shadow);
}
.alert.alarm { border-left-color: var(--alarm); }
.alert.warn  { border-left-color: var(--warn); }
.alert.info  { border-left-color: var(--blue); color: var(--quiet); }

/* ------------------------------- tanks -------------------------------- */

.tank { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; margin-bottom: 16px; }
.tank:last-child { margin-bottom: 0; }
.tank .name { font-weight: 500; }
.tank .num  { color: var(--quiet); font-variant-numeric: tabular-nums; font-size: 14px; }
.tank .bar  {
  grid-column: 1 / -1; height: 10px; border-radius: 5px;
  background: var(--blue-soft); overflow: hidden;
}
.tank .fill { height: 100%; background: var(--blue); border-radius: 5px; transition: width .4s ease; }
.tank.warn  .fill { background: var(--warn); }
.tank.alarm .fill { background: var(--alarm); }
.tank.alarm .name { color: var(--alarm); }

.total { margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--line);
         color: var(--quiet); font-size: 15px; }
.total strong { color: var(--ink); font-weight: 600; }

/* ------------------------------ figures ------------------------------- */

.figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 18px; }
.figure .label { color: var(--quiet); font-size: 13px; text-transform: uppercase; letter-spacing: .05em; }
.figure .value { font-size: 26px; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.figure .unit  { font-size: 15px; color: var(--quiet); margin-left: 3px; }
.figure .under { color: var(--quiet); font-size: 13px; }
.figure.warn  .value { color: var(--warn); }
.figure.alarm .value { color: var(--alarm); }

/* ------------------------------ forecast ------------------------------ */

.verdict { margin: 0 0 16px; font-size: 18px; line-height: 1.45; }
.caveats { margin: 14px 0 0; padding: 0; list-style: none; }
.caveats li {
  color: var(--quiet); font-size: 14px; line-height: 1.5;
  padding: 8px 0 0 14px; border-left: 2px solid var(--line); margin-bottom: 6px;
}

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

svg { display: block; width: 100%; height: auto; overflow: visible; }
.axis { fill: var(--quiet); font-size: 10px; }
.gridline { stroke: var(--line); stroke-width: 1; }
.bar { fill: var(--blue); }
.bar.today { fill: var(--ok); }
.band { fill: var(--blue-soft); }
.median { stroke: var(--blue); stroke-width: 2; fill: none; }
.reserve { stroke: var(--alarm); stroke-width: 1.5; stroke-dasharray: 4 3; fill: none; }
.line { fill: none; stroke-width: 2; }
.empty { color: var(--quiet); font-size: 14px; padding: 12px 0; }

.range { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.range button {
  border: 1px solid var(--line); background: transparent; color: var(--quiet);
  border-radius: 999px; padding: 5px 12px; font-size: 13px; cursor: pointer;
}
.range button.on { background: var(--blue); border-color: var(--blue); color: #fff; }

.legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px;
          color: var(--quiet); font-size: 13px; }
.legend span::before {
  content: ""; display: inline-block; width: 10px; height: 3px;
  border-radius: 2px; background: currentColor; margin-right: 6px; vertical-align: middle;
}

/* -------------------------------- notes ------------------------------- */

#note-form { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
#note-form input, #note-form select, #note-form button, #signin input, #signin button {
  font: inherit; padding: 9px 12px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
}
#note-form #note-detail { flex: 1 1 200px; }
#note-form #note-gallons { width: 110px; }
#note-form button, #signin button, #signout {
  background: var(--blue); border-color: var(--blue); color: #fff; cursor: pointer;
}

#notes { list-style: none; margin: 0; padding: 0; }
#notes li {
  display: flex; gap: 10px; align-items: baseline;
  padding: 9px 0; border-top: 1px solid var(--line); font-size: 15px;
}
#notes .at   { color: var(--quiet); font-size: 13px; white-space: nowrap; }
#notes .gal  { font-variant-numeric: tabular-nums; font-weight: 600; }
#notes .what { flex: 1; color: var(--quiet); }
#notes .rm   { border: 0; background: none; color: var(--quiet); cursor: pointer; font-size: 16px; }

/* ------------------------------- sign in ------------------------------ */

#signin { min-height: 80vh; display: grid; place-items: center; }
#signin form { display: grid; gap: 12px; width: min(320px, 90vw); text-align: center; }
#signin p { margin: 0; color: var(--quiet); }
.err { color: var(--alarm); }

footer { text-align: center; padding: 8px 0 0; }
#signout { border: 0; padding: 8px 18px; border-radius: 9px; font: inherit; }