:root {
  --bg: #f4f6f9; --panel: #fff; --ink: #1c2733; --muted: #6b7a8c; --line: #dde3ea;
  --brand: #1f3a5f; --brand-ink: #fff; --good: #1b7f4b; --good-bg: #e4f4ea;
  --bad: #b3261e; --bad-bg: #fbe7e5; --warn: #8a5a00; --warn-bg: #fff3d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1620; --panel: #17212d; --ink: #e6ecf3; --muted: #93a3b5; --line: #2a3848;
    --brand: #4f86c6; --brand-ink: #0b121a; --good: #5fd08f; --good-bg: #16352a;
    --bad: #ff8b82; --bad-bg: #3b1d1b; --warn: #f0c060; --warn-bg: #3a2f12;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, "Segoe UI", Tahoma, "Noto Naskh Arabic", sans-serif; }
h1 { font-size: 1.2rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 .6rem; }
h3 { font-size: .95rem; margin: 1rem 0 .4rem; }
.muted { color: var(--muted); font-size: .85rem; }
.inline { display: inline; margin: 0; }
.top { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: space-between; align-items: center;
  padding: .8rem 1rem; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.actions { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.btn, select, input { font: inherit; color: inherit; }
.btn { padding: .4rem .8rem; border: 1px solid var(--line); background: var(--panel); border-radius: 8px; cursor: pointer; }
.btn:hover { border-color: var(--brand); }
.btn.primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn.danger { color: var(--bad); }
select, input[type=number], input[type=text], input[type=password] {
  padding: .35rem .5rem; border: 1px solid var(--line); background: var(--panel); border-radius: 8px; }
.layout { display: grid; grid-template-columns: minmax(280px, 360px) minmax(0, 1fr); gap: 1rem; padding: 1rem; align-items: start; }
.results, .inputs { min-width: 0; }
@media (max-width: 900px) { .layout { grid-template-columns: minmax(0, 1fr); } }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: .8rem 1rem; }
.inputs { max-height: calc(100vh - 110px); overflow: auto; position: sticky; top: 76px; }
@media (max-width: 900px) { .inputs { position: static; max-height: none; } }
details.sec { border-bottom: 1px solid var(--line); padding: .35rem 0; }
details.sec > summary { cursor: pointer; font-weight: 600; padding: .3rem 0; }
.field { display: grid; grid-template-columns: 1fr auto; gap: .2rem .6rem; align-items: center; margin: .55rem 0; }
.field label { font-size: .88rem; }
.field .lab { grid-column: 1 / -1; min-width: 0; }
.field.nosw input, .field.nosw select { grid-column: 1 / -1; }
.field.off .lab label { opacity: .5; text-decoration: line-through; }
.field.off input:not(.sw), .field.off select { opacity: .45; }
input.sw { appearance: none; -webkit-appearance: none; flex: none; width: 38px; height: 22px; min-height: 0 !important; padding: 0;
  border-radius: 999px; background: var(--line); border: 0; position: relative; cursor: pointer; transition: background .15s; }
input.sw::after { content: ""; position: absolute; top: 2px; right: 2px; width: 18px; height: 18px; border-radius: 50%;
  background: #fff; transition: transform .15s; }
input.sw:checked { background: var(--good); }
input.sw:checked::after { transform: translateX(-16px); }
input.sw:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.alert.info { background: color-mix(in srgb, var(--brand) 14%, var(--panel)); color: var(--ink); }
a.btn { text-decoration: none; display: inline-block; }
.field input, .field select { width: 100%; text-align: left; direction: ltr; }
.field select { direction: rtl; text-align: right; }
.field .hint { grid-column: 1 / -1; color: var(--muted); font-size: .75rem; margin-top: -.15rem; }
.results > * { margin-bottom: 1rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: .6rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: .7rem .9rem; }
.card .k { color: var(--muted); font-size: .8rem; }
.card .v { font-size: 1.35rem; font-weight: 700; direction: ltr; text-align: right; }
.card .s { color: var(--muted); font-size: .75rem; }
.card.good .v { color: var(--good); } .card.bad .v { color: var(--bad); }
.alert { padding: .5rem .8rem; border-radius: 10px; background: var(--warn-bg); color: var(--warn); margin-bottom: .4rem; }
.tablewrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .88rem; }
th, td { padding: .35rem .55rem; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
td.n { direction: ltr; text-align: right; font-variant-numeric: tabular-nums; }
th { background: color-mix(in srgb, var(--brand) 12%, var(--panel)); font-weight: 600; }
tr.total td { font-weight: 700; }
tr.sel td { background: color-mix(in srgb, var(--brand) 12%, transparent); }
td.pos { color: var(--good); } td.neg { color: var(--bad); }
td.heat-pos { background: var(--good-bg); } td.heat-neg { background: var(--bad-bg); }
svg.chart { width: 100%; height: 240px; }
svg.chart text { fill: var(--muted); font-size: 11px; }
.toast { position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%); background: var(--brand);
  color: var(--brand-ink); padding: .5rem 1rem; border-radius: 10px; opacity: 0; pointer-events: none; transition: opacity .2s; }
.toast.show { opacity: 1; }
.tabs { display: none; }
@media (max-width: 900px) {
  .top { position: static; padding: .6rem .8rem; }
  .actions { width: 100%; }
  .actions .btn, .actions select { flex: 1 1 auto; min-height: 44px; }
  .actions select { max-width: 100%; }
  .tabs { display: flex; gap: .4rem; padding: .5rem .8rem 0; position: sticky; top: 0; z-index: 6; background: var(--bg); }
  .tab { flex: 1; min-height: 44px; border: 1px solid var(--line); background: var(--panel); border-radius: 10px; font: inherit; color: inherit; cursor: pointer; }
  .tab.active { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); font-weight: 700; }
  body.view-results .inputs, body.view-inputs .results { display: none; }
  .layout { padding: .6rem .8rem 4rem; }
  input, select, .field input, .field select { font-size: 16px; min-height: 44px; }  /* stops iOS zoom-on-focus */
  .card .v { font-size: 1.2rem; }
  .cards { grid-template-columns: repeat(2, 1fr); }
}
@supports (padding: max(0px)) { body { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); } }
.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-card { width: min(92vw, 360px); background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.4rem; display: grid; gap: .8rem; }
.login-card label { display: grid; gap: .25rem; font-size: .9rem; }
.login-card input { width: 100%; direction: ltr; font-size: 16px; min-height: 44px; }
.login-card .btn { min-height: 44px; }
.login-error { color: var(--bad); min-height: 1.2em; font-size: .85rem; }
.field input.sw { width: 38px; height: 22px; min-height: 0; justify-self: end; }

.field .itemrow { display: flex; gap: .4rem; min-width: 0; }
.field .itemrow select { flex: 0 0 48%; width: auto; direction: rtl; text-align: right; }
.field .itemrow input { flex: 1; min-width: 0; width: auto; }
.field.item.off .itemrow { opacity: .45; }
.field.item .hint { margin-top: 0; }

tr.off td { opacity: .45; text-decoration: line-through; }

.bigline { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .6rem; margin: .5rem 0 .8rem; }
.bigline > div { background: color-mix(in srgb, var(--brand) 10%, var(--panel)); border-radius: 12px; padding: .5rem .8rem; display: grid; }
.bigline .big { font-size: 1.6rem; font-weight: 800; direction: ltr; text-align: right; }
.bigline .k { color: var(--muted); font-size: .78rem; }