/* M&M Oil — field app. Mobile first, high contrast for outdoor use. */
:root {
  --bg: #eef1f3;
  --surface: #ffffff;
  --ink: #142028;
  --ink-2: #44535d;
  --muted: #6b7a84;
  --line: #d5dce1;
  --line-2: #e6eaed;
  --brand: #1d2a33;
  --brand-2: #2b3d49;
  --accent: #e0a100;
  --accent-ink: #1a1400;
  --ok: #1f7a4a;
  --ok-bg: #e3f4ea;
  --warn: #9a5b00;
  --warn-bg: #fff3d6;
  --bad: #b3261e;
  --bad-bg: #fde8e6;
  --focus: #1769c4;
  --radius: 12px;
  --tap: 48px;
  --shadow: 0 1px 2px rgba(20,32,40,.06), 0 2px 8px rgba(20,32,40,.05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f161b; --surface: #172229; --ink: #e8eef2; --ink-2: #b7c3cb; --muted: #8796a0;
    --line: #2c3a44; --line-2: #22303a; --brand: #0b1115; --brand-2: #16222a;
    --ok-bg: #12301f; --ok: #6fd39b; --warn-bg: #3a2a08; --warn: #f2c35a; --bad-bg: #3a1513; --bad: #ff8a80;
    --focus: #6aa8ff; --shadow: none; color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.45 var(--font); }
a { color: inherit; }
img, svg { display: block; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* ---------------------------------------------------------------- top bar */
.topbar { position: sticky; top: 0; z-index: 20; background: var(--brand); color: #fff; padding-top: env(safe-area-inset-top); }
.topbar-inner { display: flex; align-items: center; gap: 10px; max-width: 1180px; margin: 0 auto; padding: 0 12px; min-height: 56px; }
.back { display: grid; place-items: center; width: 40px; height: 40px; margin-left: -6px; border-radius: 10px; color: #fff; }
.back:active { background: rgba(255,255,255,.12); }
.brand { display: flex; align-items: baseline; gap: 4px; text-decoration: none; font-weight: 800; letter-spacing: .02em; }
.brand-mark { background: var(--accent); color: var(--accent-ink); padding: 2px 6px; border-radius: 6px; font-size: 14px; }
.brand-text { font-size: 15px; opacity: .9; }
.topbar-title { flex: 1; min-width: 0; font-weight: 650; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.menu-btn { display: grid; place-items: center; width: 44px; height: 44px; margin-right: -6px; border: 0; border-radius: 10px; background: transparent; color: #fff; cursor: pointer; }
.menu-btn:active { background: rgba(255,255,255,.12); }

.mainnav { display: none; background: var(--brand-2); padding: 6px 12px 14px; }
.mainnav.open { display: block; }
.mainnav > a { display: block; padding: 12px 10px; border-radius: 10px; color: #dfe7ec; text-decoration: none; font-weight: 600; }
.mainnav > a.active { background: rgba(224,161,0,.18); color: #ffd56a; }
.nav-user { border-top: 1px solid rgba(255,255,255,.12); margin-top: 8px; padding: 12px 10px 0; color: #aebbc4; font-size: 14px; display: grid; gap: 8px; }
.nav-user a, .nav-user .linklike { color: #fff; font-weight: 600; }

@media (min-width: 960px) {
  .menu-btn { display: none; }
  .mainnav { display: flex; flex-wrap: wrap; gap: 2px; align-items: center; max-width: 1180px; margin: 0 auto; background: transparent; padding: 0 12px 8px; }
  .mainnav > a { padding: 8px 12px; font-size: 15px; }
  .nav-user { margin: 0 0 0 auto; padding: 0; border: 0; display: flex; gap: 14px; align-items: center; }
  .topbar { background: var(--brand); }
}

/* ---------------------------------------------------------------- page */
.page { max-width: 1180px; margin: 0 auto; padding: 16px 16px calc(40px + env(safe-area-inset-bottom)); }
h1 { font-size: 24px; line-height: 1.2; margin: 6px 0 4px; }
h2 { font-size: 18px; margin: 22px 0 10px; }
h3 { font-size: 16px; margin: 0 0 6px; }
p { margin: 0 0 10px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px 16px; margin-bottom: 14px; }
.page-head .grow { flex: 1 1 260px; min-width: 0; }
.page-head .sub { color: var(--muted); margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin: 0 0 14px; }
.card > :last-child { margin-bottom: 0; }

.flash { padding: 12px 14px; border-radius: 10px; margin: 0 0 14px; font-weight: 600; border: 1px solid transparent; }
.flash-ok { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.flash-error { background: var(--bad-bg); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 30%, transparent); }
.flash-warn { background: var(--warn-bg); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }

/* ---------------------------------------------------------------- buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--tap); padding: 0 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: 650 16px/1 var(--font); text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-dark { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 40%, var(--line)); }
.btn-sm { min-height: 38px; padding: 0 12px; font-size: 14px; }
.btn-block { width: 100%; }
.linklike { background: none; border: 0; padding: 0; font: inherit; color: inherit; text-decoration: underline; cursor: pointer; }

/* sticky save bar on long forms */
.savebar { position: sticky; bottom: 0; z-index: 10; display: flex; gap: 10px; padding: 12px 0 calc(12px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg) 70%, transparent); }
.savebar .btn-primary { flex: 1; }
@media (min-width: 720px) { .savebar .btn-primary { flex: 0 0 auto; min-width: 200px; } }

/* ---------------------------------------------------------------- home tiles */
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (min-width: 720px) { .tiles { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.tile { display: flex; flex-direction: column; gap: 10px; min-height: 112px; padding: 16px; border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--line); box-shadow: var(--shadow); text-decoration: none; }
.tile:active { background: var(--line-2); }
.tile .ico { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--brand); color: var(--accent); }
.tile strong { font-size: 17px; }
.tile span { color: var(--muted); font-size: 14px; margin-top: -6px; }

/* ---------------------------------------------------------------- lists */
.list { list-style: none; margin: 0 0 14px; padding: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.list > li + li { border-top: 1px solid var(--line-2); }
.list a.row, .list .row { display: flex; align-items: center; gap: 12px; padding: 14px 16px; min-height: 60px; text-decoration: none; }
.list a.row:active { background: var(--line-2); }
.row .main { flex: 1; min-width: 0; }
.row .title { font-weight: 650; }
.row .meta { color: var(--muted); font-size: 14px; }
.row .end { text-align: right; flex: 0 0 auto; }
.row .chev { color: var(--muted); }
.group-label { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 700; margin: 18px 4px 8px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; background: var(--line-2); color: var(--ink-2); vertical-align: middle; }
.badge-sold { background: #dbeafe; color: #1e3a8a; }
.badge-off { background: var(--bad-bg); color: var(--bad); }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
@media (prefers-color-scheme: dark) { .badge-sold { background: #1b2c4d; color: #a9c5ff; } }

/* data tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 14px; }
table.data { width: 100%; border-collapse: collapse; font-size: 15px; }
table.data th, table.data td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line-2); white-space: nowrap; }
table.data th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--surface); position: sticky; top: 0; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data tr:last-child td { border-bottom: 0; }
table.data tfoot td { font-weight: 700; border-top: 2px solid var(--line); }
table.data td.wrap { white-space: normal; min-width: 220px; }
table.data td.stack span { display: block; }
@media (max-width: 479px) {
  .hide-sm { display: none; }
  table.data th, table.data td { padding: 9px 8px; }
  table.data { font-size: 14px; }
}
table.data tr.inactive td { color: var(--muted); text-decoration: line-through; }
table.data a { font-weight: 650; }
table.pivot th:first-child, table.pivot td:first-child { position: sticky; left: 0; background: var(--surface); z-index: 1; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 14px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.stat .k { font-size: 13px; color: var(--muted); font-weight: 600; }
.stat .v { font-size: 22px; font-weight: 750; font-variant-numeric: tabular-nums; }
.stat .s { font-size: 13px; color: var(--muted); }

/* ---------------------------------------------------------------- forms */
fieldset.section { border: 1px solid var(--line); }
fieldset.section legend { font-weight: 750; font-size: 16px; padding: 0 6px; margin-left: -6px; }
.grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px 16px; }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1000px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.field.wide { grid-column: 1 / -1; }
.field label, .field .label { display: block; font-weight: 650; font-size: 14px; color: var(--ink-2); margin-bottom: 6px; }
.req { color: var(--bad); }
input[type=text], input[type=password], input[type=email], input[type=date], input[type=time], input[type=search], select, textarea {
  width: 100%; min-height: var(--tap); padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface);
  color: var(--ink); font: 16px/1.3 var(--font); appearance: none; -webkit-appearance: none; }
select { background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%; background-size: 6px 6px; background-repeat: no-repeat; padding-right: 34px; }
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--focus); outline: 2px solid color-mix(in srgb, var(--focus) 30%, transparent); outline-offset: 0; }
.has-error input, .has-error select, .has-error textarea { border-color: var(--bad); }
.error { color: var(--bad); font-size: 14px; font-weight: 600; margin: 6px 0 0; }
.help { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
.static { min-height: var(--tap); display: flex; align-items: center; font-weight: 650; }
.with-suffix { display: flex; align-items: center; gap: 8px; }
.with-suffix .suffix { color: var(--muted); font-size: 14px; white-space: nowrap; }

.field-check { display: flex; align-items: center; }
.check { display: flex !important; align-items: center; gap: 10px; min-height: var(--tap); padding: 0 12px; border: 1px solid var(--line); border-radius: 10px;
  cursor: pointer; width: 100%; margin: 0 !important; color: var(--ink) !important; font-size: 16px !important; }
.check input { width: 22px; height: 22px; accent-color: var(--accent); flex: 0 0 auto; }
.check:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--surface)); }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg label { margin: 0 !important; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: grid; place-items: center; min-width: 72px; min-height: var(--tap); padding: 0 14px; font-weight: 650; cursor: pointer; color: var(--ink); }
.seg label + label span { border-left: 1px solid var(--line); }
.seg input:checked + span { background: var(--brand); color: #fff; }
.seg input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: -3px; }

.distance { display: flex; gap: 8px; align-items: stretch; }
.distance label { display: flex !important; align-items: center; gap: 6px; margin: 0 !important; font-weight: 600; color: var(--muted) !important; }
.distance input { width: 76px; text-align: center; font-variant-numeric: tabular-nums; }
.distance select { width: 76px; padding-right: 26px; text-align: center; }
.distance.big { gap: 6px; }
.distance.big input, .distance.big select { min-height: 64px; font-size: 26px; font-weight: 700; width: 78px; padding: 8px 6px; }
.distance.big select { width: 82px; padding-right: 24px; background-position: calc(100% - 14px) 50%, calc(100% - 8px) 50%; }
.distance.big label span { font-size: 17px; }
@media (min-width: 420px) { .distance.big input { width: 92px; } .distance.big select { width: 96px; } }

.filters { display: grid; grid-template-columns: minmax(0,1fr); gap: 10px; }
@media (min-width: 640px) { .filters { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); align-items: end; } }
.filters .field label { margin-bottom: 4px; }
details.filter-box > summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; align-items: center; justify-content: space-between; }
details.filter-box > summary::-webkit-details-marker { display: none; }
details.filter-box > summary::after { content: "Show"; font-weight: 600; color: var(--muted); font-size: 14px; }
details.filter-box[open] > summary::after { content: "Hide"; }
details.filter-box[open] > summary { margin-bottom: 12px; }

.search { position: relative; margin-bottom: 12px; }
.search input { padding-left: 40px; }
.search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); }

/* gauge entry */
.gauge-preview { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 8px; margin-top: 12px; }
.gauge-preview div { background: var(--bg); border-radius: 10px; padding: 10px; text-align: center; }
.gauge-preview .k { font-size: 12px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.gauge-preview [data-out=last] { font-size: 14px !important; line-height: 1.3; padding-top: 4px; }
.gauge-preview .v { font-size: 20px; font-weight: 750; font-variant-numeric: tabular-nums; }
.tank-chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
.tank-chips label { margin: 0 !important; }
.tank-chips input { position: absolute; opacity: 0; }
.tank-chips span { display: block; padding: 12px; border: 1px solid var(--line); border-radius: 10px; font-weight: 700; color: var(--ink); cursor: pointer; min-height: var(--tap); }
.tank-chips small { display: block; font-weight: 500; color: var(--muted); font-size: 13px; }
.tank-chips input:checked + span { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, var(--surface)); box-shadow: inset 0 0 0 1px var(--accent); }
.tank-chips input:focus-visible + span { outline: 3px solid var(--focus); }

.calc { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.calc div { background: var(--bg); border-radius: 10px; padding: 12px; }
.calc .k { font-size: 13px; color: var(--muted); font-weight: 650; }
.calc .v { font-size: 22px; font-weight: 750; font-variant-numeric: tabular-nums; }
.calc .low .v { color: var(--bad); }

/* login */
.signed-out .page { min-height: 100vh; display: grid; place-items: center; padding-top: 24px; }
.login { width: min(400px, 100%); }
.login .brand-big { display: flex; align-items: center; gap: 10px; justify-content: center; margin-bottom: 18px; font-weight: 800; font-size: 22px; }
.login .brand-big .brand-mark { font-size: 20px; padding: 4px 9px; }
.login form { display: grid; gap: 14px; }

.pager { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 6px 0 16px; color: var(--muted); font-size: 14px; }
.empty { text-align: center; padding: 28px 16px; color: var(--muted); }
.kv { display: grid; grid-template-columns: minmax(120px, max-content) 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--muted); font-weight: 600; }
.kv dd { margin: 0; }

/* printable report */
.report-doc h2 { border-bottom: 2px solid var(--ink); padding-bottom: 4px; }
.entry { break-inside: avoid; border-top: 1px solid var(--line); padding: 12px 0; }
.entry h3 { display: flex; justify-content: space-between; gap: 10px; }
.entry dl { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 4px 18px; margin: 6px 0 0; }
.entry dl div { display: flex; gap: 6px; }
.entry dt { color: var(--muted); }
.entry dd { margin: 0; font-weight: 600; }
.entry .notes { white-space: pre-wrap; margin-top: 6px; }

[data-forms][hidden] { display: none !important; }

@media print {
  .topbar, .no-print, .savebar, .flash { display: none !important; }
  body { background: #fff; color: #000; font-size: 12px; }
  .page { padding: 0; max-width: none; }
  .card, .table-wrap, .list { box-shadow: none; border-color: #999; }
  table.data th { position: static; }
}