/* car-tracker
   ------------------------------------------------------------------------
   One stylesheet for the whole site, served under a name that contains a hash
   of its contents so it is fetched once and then never again.

   Tokens first, components second. Anything a page wants to look different
   about should be a variable here rather than a style attribute there: half of
   this site gets read one-handed at a pump and the other half gets read
   properly at a desk, and those two want the same decisions made once.

   Every number on this site is a number, so the whole thing is set with
   tabular figures. A column of odometer readings that does not line up is a
   column you cannot scan, which is the only thing a column of odometer
   readings is for. */

/* ---------------------------------------------------------------- tokens */

:root {
  color-scheme: light dark;

  /* Surfaces, furthest to nearest: the page, the cards on it, the things that
     sit on a card, and a well for the things that sit under one. */
  --bg: #f4f5f7;
  --surface: #ffffff;
  --raised: #fafbfc;
  --sunken: #eceef1;

  --text: #161b22;
  --muted: #5c6773;
  --faint: #8b95a1;
  --line: #e0e4e9;
  --line-strong: #c8cfd7;

  /* A deep instrument-panel blue, with amber for the things that want
     watching and red for money going out. */
  --accent: #1d4e77;
  --accent-hover: #143755;
  --accent-text: #ffffff;
  --accent-weak: #e8f0f7;
  --accent-line: #c2d7e8;

  --amber: #8a5a00;
  --amber-bg: #fcf2df;
  --amber-line: #eddcb4;

  --red: #a3182b;
  --red-bg: #fbeaec;

  --green: #1c6b39;
  --green-bg: #e6f2ea;

  --error-bg: #fbeaec;
  --error-text: #8f1526;
  --ok-bg: #e6f2ea;
  --ok-text: #1c6b39;
  --warn-bg: #fcf2df;
  --warn-text: #82530f;

  /* The chart palette. It lives here rather than in the svg so a line and the
     swatch in its legend cannot drift apart, and so both are right in either
     theme without the picture being drawn twice. */
  --line-mpg: #1d4e77;
  --line-mpg-avg: #8a5a00;
  --line-paid: #1d4e77;
  --line-pump: #8b95a1;
  --line-cost: #1c6b39;
  --grid: #e0e4e9;

  --r-sm: 8px;
  --r-md: 11px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(22, 27, 34, 0.05);
  --shadow-md: 0 1px 3px rgba(22, 27, 34, 0.06), 0 6px 16px -6px rgba(22, 27, 34, 0.10);
  --shadow-lg: 0 2px 6px rgba(22, 27, 34, 0.07), 0 18px 40px -18px rgba(22, 27, 34, 0.20);

  --font-display: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --page: 1180px;
  --gutter: 26px;

  /* 44px is the smallest thing a thumb hits reliably. */
  --tap: 44px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --surface: #161b22;
    --raised: #1d232c;
    --sunken: #0b0e13;

    --text: #e8edf3;
    --muted: #9aa5b1;
    --faint: #6f7b88;
    --line: #262d37;
    --line-strong: #384250;

    --accent: #5aa9e6;
    --accent-hover: #7dbdee;
    --accent-text: #06121d;
    --accent-weak: #132434;
    --accent-line: #234158;

    --amber: #e3a83a;
    --amber-bg: #2b2412;
    --amber-line: #47391a;

    --red: #f2808f;
    --red-bg: #331a1e;

    --green: #6ec994;
    --green-bg: #13291d;

    --error-bg: #331a1e;
    --error-text: #f7b3bd;
    --ok-bg: #13291d;
    --ok-text: #8fd6a6;
    --warn-bg: #2b2412;
    --warn-text: #edcb8c;

    --line-mpg: #5aa9e6;
    --line-mpg-avg: #e3a83a;
    --line-paid: #5aa9e6;
    --line-pump: #6f7b88;
    --line-cost: #6ec994;
    --grid: #262d37;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.45), 0 6px 16px -6px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.5), 0 18px 40px -18px rgba(0, 0, 0, 0.75);
  }
}

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

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  padding: var(--gutter) var(--gutter) 96px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font-body);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

/* Signed out pages are a single centred card; signed in pages are a page. */
body.centred {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: var(--gutter);
}

body.centred main {
  width: 100%;
  max-width: 440px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 34px;
  box-shadow: var(--shadow-md);
}

main {
  width: 100%;
  max-width: var(--page);
  margin: 0 auto;
}

h1 {
  margin: 0 0 4px;
  font: 600 27px/1.25 var(--font-display);
  letter-spacing: -0.01em;
}

h2 {
  margin: 0 0 14px;
  font: 600 19px/1.3 var(--font-display);
}

h3 {
  margin: 0 0 10px;
  font: 600 15px/1.3 var(--font-body);
}

p { margin: 0 0 14px; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

small, .small { font-size: 13px; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.center { text-align: center; }

.sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14.5px;
}

hr {
  height: 1px;
  margin: 24px 0;
  border: 0;
  background: var(--line);
}

/* ----------------------------------------------------------------- head */

.bar {
  max-width: var(--page);
  margin: 0 auto 22px;
}

.bar nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: 7px 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-sm);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px 0 10px;
  color: var(--text);
  font: 600 16px/1 var(--font-display);
  white-space: nowrap;
}

.brand:hover { text-decoration: none; }

.bar .tab,
.bar .who {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 14px;
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: 14.5px;
  white-space: nowrap;
}

.bar .tab:hover,
.bar .who:hover {
  background: var(--sunken);
  color: var(--text);
  text-decoration: none;
}

.bar .tab.on,
.bar .who.on {
  background: var(--accent-weak);
  color: var(--accent);
  font-weight: 600;
}

.bar .spacer { flex: 1; }

.bar form { margin: 0; }

button.link {
  height: 36px;
  padding: 0 12px;
  background: none;
  border: 0;
  border-radius: var(--r-pill);
  color: var(--muted);
  font: inherit;
  font-size: 14.5px;
  cursor: pointer;
}

button.link:hover { background: var(--sunken); color: var(--text); }

/* The same links along the bottom, for a phone. Only one of the two is ever
   on screen. */
.tabbar { display: none; }

@media (max-width: 860px) {
  .bar nav .tab,
  .bar nav .who,
  .bar nav form { display: none; }

  .bar nav { border-radius: var(--r-lg); }

  .tabbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    display: flex;
    justify-content: space-around;
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    background: var(--surface);
    border-top: 1px solid var(--line);
  }

  .tabbar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    flex: 1;
    min-height: var(--tap);
    padding: 4px 2px;
    color: var(--muted);
    font-size: 10.5px;
    text-align: center;
  }

  .tabbar a.on { color: var(--accent); font-weight: 600; }
  .tabbar a:hover { text-decoration: none; }
  .tabbar .ico { font-size: 16px; }
}

/* A car's own row of pages. It is a second level of navigation rather than a
   filter: each one is a different question about the same car, and which one
   you are on belongs in the address so it can be sent. */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0 0 2px;
}

.tabs a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.tabs a:hover { background: var(--sunken); color: var(--text); text-decoration: none; }

.tabs a.on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

/* ---------------------------------------------------------------- cards */

.card {
  margin: 0 0 20px;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}

.card > :last-child { margin-bottom: 0; }

.card .head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
}

.card .head h2 { margin: 0; }
.card .head .spacer { flex: 1; }

.pagehead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px;
  margin-bottom: 20px;
}

.pagehead .spacer { flex: 1; }

/* --------------------------------------------------------------- garage */

.cars {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

/* The card is a box with a link filling most of it rather than a link that is
   the whole box, because the buttons along its bottom are the point of it and
   an anchor cannot hold another one. */
.car {
  display: flex;
  flex-direction: column;
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  transition: box-shadow 0.15s, border-color 0.15s;
}

.car:hover {
  border-color: var(--accent-line);
  box-shadow: var(--shadow-md);
}

.car.default { border-color: var(--accent-line); }

/* flex: 1 so that the buttons sit on the bottom edge of every card in a row,
   however much taller the tallest one is. */
.carbody {
  flex: 1;
  display: block;
  color: var(--text);
}

.carbody:hover { text-decoration: none; }

.carbtns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.carbtns .spacer { flex: 1; }
.carbtns form { margin: 0; }

.carbtns .star.on {
  background: var(--accent-weak);
  border-color: var(--accent-line);
  color: var(--accent);
}

.car h2 { margin: 0 0 2px; }
.car .desc { margin: 0 0 14px; color: var(--muted); font-size: 14px; }

.car dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
  margin: 0;
}

.car dt {
  margin: 0;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.car dd {
  margin: 1px 0 0;
  font: 600 17px/1.2 var(--font-body);
}

/* ---------------------------------------------------------------- tiles */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 1px;
  margin: 0 0 20px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.tile {
  padding: 15px 17px;
  background: var(--surface);
}

.tile .label {
  display: block;
  margin-bottom: 5px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tile .value {
  display: block;
  font: 600 23px/1.15 var(--font-body);
  letter-spacing: -0.02em;
}

.tile .value.small { font-size: 18px; }

.tile .note {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12.5px;
}

.tile.wide { grid-column: span 2; }
.tile.accent .value { color: var(--accent); }
.tile.good .value { color: var(--green); }
.tile.warn .value { color: var(--amber); }

/* ---------------------------------------------------------------- table */

.scroll {
  margin: 0 -24px;
  padding: 0 24px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  padding: 0 12px 8px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--faint);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-align: left;
  text-transform: uppercase;
  white-space: nowrap;
}

thead th.right { text-align: right; }

tbody td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--raised); }

td.right { text-align: right; }
td.num { text-align: right; white-space: nowrap; }
td.strong { font-weight: 600; }

tfoot td {
  padding: 10px 12px;
  border-top: 2px solid var(--line-strong);
  font-weight: 600;
}

/* A row that read perfectly and is still worth a second look. */
tr.odd td { background: var(--warn-bg); }
tr.bad td { background: var(--error-bg); }

.rowmark {
  display: inline-block;
  margin-left: 6px;
  color: var(--amber);
  font-size: 12px;
}

/* A bar drawn inside a table cell, behind the number. It is a comparison you
   can take in without reading, which is the whole point of putting one place's
   forty fill-ups next to another's two. */
.barcell {
  position: relative;
  min-width: 110px;
}

.barcell .fill {
  position: absolute;
  left: 12px;
  top: 50%;
  height: 6px;
  margin-top: -3px;
  background: var(--accent-weak);
  border-radius: var(--r-pill);
}

.barcell .fill.warm { background: var(--amber-bg); }
.barcell span { position: relative; }

/* ---------------------------------------------------------------- chart */

.chart {
  margin: 0 0 6px;
  overflow: hidden;
}

.chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart .grid {
  stroke: var(--grid);
  stroke-width: 1;
}

.chart .axis {
  fill: var(--faint);
  font: 10px var(--font-body);
}

.chart .axis.y { text-anchor: end; }
.chart .axis.x { text-anchor: middle; }

.chart path {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart path.dashed {
  stroke-width: 1.75;
  stroke-dasharray: 5 4;
  opacity: 0.85;
}

.chart .mpg { stroke: var(--line-mpg); }
.chart .mpg-avg { stroke: var(--line-mpg-avg); }
.chart .paid { stroke: var(--line-paid); }
.chart .pump { stroke: var(--line-pump); }
.chart .cost { stroke: var(--line-cost); }

.chart circle {
  r: 2.6;
  stroke: var(--surface);
  stroke-width: 1.5;
}

.chart circle.mpg { fill: var(--line-mpg); stroke: var(--surface); }
.chart circle.paid { fill: var(--line-paid); stroke: var(--surface); }
.chart circle.cost { fill: var(--line-cost); stroke: var(--surface); }

.chart circle:hover { r: 5; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend i {
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.legend .mpg { color: var(--line-mpg); }
.legend .mpg-avg { color: var(--line-mpg-avg); }
.legend .paid { color: var(--line-paid); }
.legend .pump { color: var(--line-pump); }
.legend .cost { color: var(--line-cost); }
.legend .name { color: var(--muted); }

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px 16px;
}

.field { margin: 0 0 14px; }
.grid .field { margin: 0; }

label {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

label .hint {
  display: block;
  margin-top: 2px;
  color: var(--faint);
  font-size: 12px;
  font-weight: 400;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  min-height: var(--tap);
  padding: 9px 12px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--text);
  font: 16px/1.4 var(--font-body);
  font-variant-numeric: tabular-nums;
}

textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.5;
}

textarea.paste {
  min-height: 220px;
  font: 13px/1.5 var(--font-mono);
  white-space: pre;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 0 0 10px;
  font-size: 14px;
}

.check input { margin: 3px 0 0; width: 17px; height: 17px; flex: none; }
.check label { margin: 0; font-weight: 500; color: var(--text); }

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.actions .spacer { flex: 1; }

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--text);
  font: 600 15px/1 var(--font-body);
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover,
button:hover { background: var(--sunken); text-decoration: none; }

.btn.primary,
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.btn.primary:hover,
button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn.danger,
button.danger {
  border-color: var(--red);
  color: var(--red);
  background: var(--surface);
}

.btn.danger:hover,
button.danger:hover { background: var(--red-bg); }

.btn.small,
button.small {
  min-height: 32px;
  padding: 0 11px;
  font-size: 13px;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }

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

.banner {
  display: flex;
  gap: 10px;
  margin: 0 0 18px;
  padding: 12px 16px;
  border-radius: var(--r-sm);
  font-size: 14.5px;
}

.banner.error { background: var(--error-bg); color: var(--error-text); }
.banner.ok { background: var(--ok-bg); color: var(--ok-text); }
.banner.warn { background: var(--warn-bg); color: var(--warn-text); }

.banner.info {
  background: var(--accent-weak);
  color: var(--accent);
  border: 1px solid var(--accent-line);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 9px;
  border-radius: var(--r-pill);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.pill.quiet { background: var(--sunken); color: var(--muted); }
.pill.accent { background: var(--accent-weak); color: var(--accent); }
.pill.warn { background: var(--amber-bg); color: var(--amber); }
.pill.bad { background: var(--red-bg); color: var(--red); }
.pill.good { background: var(--green-bg); color: var(--green); }

.empty {
  padding: 40px 24px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-lg);
  color: var(--muted);
  text-align: center;
}

.empty h2 { margin-bottom: 6px; color: var(--text); }

/* ---------------------------------------------------------------- panes */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .tile.wide { grid-column: span 1; }
  body { padding-left: 16px; padding-right: 16px; }
  .card { padding: 18px 16px; }
  .scroll { margin: 0 -16px; padding: 0 16px; }
}

/* A stack of related rows that is not quite a table: the share list, the
   preview of an import, a shop's line items. */
.rows { margin: 0; padding: 0; list-style: none; }

.rows li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.rows li:last-child { border-bottom: 0; }
.rows li .spacer { flex: 1; }

.work { margin: 0; padding-left: 18px; }
.work li { margin: 0 0 2px; }

.raw {
  display: block;
  margin-top: 3px;
  color: var(--faint);
  font: 12px/1.4 var(--font-mono);
  word-break: break-all;
}

.ico { width: 1em; text-align: center; }