/* NiftyBias - one stylesheet, no external fonts or libraries.
   Colour roles: --bull is bullish / support / put OI, --bear is bearish /
   resistance / call OI. The pair was checked for colour-blind separation on
   both surfaces; every use is also labelled in text, never colour alone. */

:root {
  color-scheme: light;
  --page: #f1f2ee;
  --surface: #fbfbf9;
  --ink: #131a19;
  --ink-2: #4a5452;
  --muted: #727b79;
  --hair: #dfe2dc;
  --axis: #c2c7c0;
  --track: #e7e9e3;
  --bull: #0f8a6d;
  --bear: #cf4332;
  --spot: #2a78d6;
  --warn: #9a6400;
  --focus: #2a78d6;
  --btn: #131a19;
  --btn-ink: #ffffff;
  --row: rgba(19, 26, 25, 0.045);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d1213;
    --surface: #141a1c;
    --ink: #f2f5f3;
    --ink-2: #b9c2bf;
    --muted: #8a9592;
    --hair: #263033;
    --axis: #3a4649;
    --track: #222b2e;
    --bull: #1c9c79;
    --bear: #de5846;
    --spot: #3987e5;
    --warn: #e0a63a;
    --focus: #6aa6f0;
    --btn: #f2f5f3;
    --btn-ink: #0d1213;
    --row: rgba(242, 245, 243, 0.06);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3 { margin: 0; font-weight: 650; line-height: 1.25; text-wrap: balance; }
h2 { font-size: 17px; }
h3 { font-size: 15px; margin-top: 24px; }
p { margin: 8px 0; }
a { color: inherit; }
code, .mono { font-family: Consolas, "Cascadia Mono", ui-monospace, Menlo, monospace; font-size: 0.93em; }
[hidden] { display: none !important; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.nowrap { white-space: nowrap; }
.hint { color: var(--ink-2); font-size: 13.5px; max-width: 78ch; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

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

.top {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--hair);
}
.brand { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; text-decoration: none; }
.top nav { display: flex; gap: 4px; flex: 1; }
.top nav a { padding: 6px 10px; border-radius: 6px; text-decoration: none; color: var(--ink-2); }
.top nav a[aria-current="page"] { color: var(--ink); background: var(--row); font-weight: 600; }
.signout { margin: 0; }

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

label { display: block; font-weight: 600; font-size: 13.5px; margin: 14px 0 4px; }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], textarea, select {
  width: 100%;
  padding: 8px 10px;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--axis);
  border-radius: 6px;
}
textarea { resize: vertical; font-family: Consolas, "Cascadia Mono", ui-monospace, Menlo, monospace; font-size: 13px; }
input[readonly] { background: var(--page); }
input[type="checkbox"], input[type="radio"] { accent-color: var(--ink); }

button {
  font: inherit; font-weight: 600;
  padding: 8px 14px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--axis);
  border-radius: 6px;
  cursor: pointer;
}
button:hover { border-color: var(--ink-2); }
button.primary { background: var(--btn); color: var(--btn-ink); border-color: var(--btn); }
button.link { border: 0; background: none; padding: 4px 6px; font-weight: 500; color: var(--ink-2); text-decoration: underline; white-space: nowrap; }
button.link:hover { color: var(--ink); }
button:disabled { opacity: 0.55; cursor: default; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
form.inline { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0 20px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 20px; align-items: end; }
.grid3 .bottom { padding-bottom: 1px; }
.copyrow { display: flex; gap: 8px; }
.copyrow input { flex: 1; min-width: 0; }
fieldset.choice { border: 0; padding: 0; margin: 14px 0 0; }
fieldset.choice legend { font-weight: 600; font-size: 13.5px; padding: 0; margin-bottom: 4px; }
fieldset.choice label { font-weight: 400; font-size: 15px; margin: 4px 0; display: flex; gap: 8px; align-items: baseline; }

.msg { padding: 10px 14px; border-radius: 6px; border: 1px solid var(--hair); border-left-width: 4px; background: var(--surface); overflow-wrap: anywhere; }
.msg.good { border-left-color: var(--bull); }
.msg.bad { border-left-color: var(--bear); }
.msg.warn { border-left-color: var(--warn); }

.state { display: flex; gap: 8px; align-items: baseline; }
.dot { flex: none; width: 9px; height: 9px; border-radius: 50%; background: var(--muted); transform: translateY(-1px); }
.good > .dot, .dot.good { background: var(--bull); }
.bad > .dot, .dot.bad { background: var(--bear); }
.warn > .dot, .dot.warn { background: var(--warn); }

.tag { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 12.5px; font-weight: 600; border: 1px solid var(--axis); }
.tag.good { border-color: var(--bull); }
.tag.bad { border-color: var(--bear); }
.tag.warn { border-color: var(--warn); }

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

.scroll { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th { text-align: left; font-weight: 600; font-size: 13px; color: var(--ink-2); padding: 6px 10px 6px 0; border-bottom: 1px solid var(--axis); white-space: nowrap; }
table.data th.num { text-align: right; }
table.data td { padding: 6px 10px 6px 0; border-bottom: 1px solid var(--hair); vertical-align: top; }
table.data td.wrap { min-width: 240px; overflow-wrap: anywhere; }
table.data.form td { vertical-align: middle; }
table.data.form input[type="number"], table.data.form input[type="date"] { min-width: 96px; padding: 5px 8px; }
table.data.form input[type="text"] { min-width: 180px; padding: 5px 8px; }
table.data.form label { margin: 0; font-weight: 500; font-size: 14px; }

/* ------------------------------------------------- sign-in and settings */

body.plain { display: grid; place-items: start center; padding: 9vh 16px 40px; }
.narrow { width: 100%; max-width: 440px; background: var(--surface); border: 1px solid var(--hair); border-radius: 10px; padding: 28px; }
.wordmark { font-size: 24px; letter-spacing: -0.02em; margin-bottom: 18px; }
.narrow h2 { margin-bottom: 8px; }
.narrow button.primary { width: 100%; margin-top: 20px; padding: 10px; }
.wide { width: 100%; }

main.settings { max-width: 1040px; margin: 0 auto; padding: 20px 16px 60px; display: grid; gap: 16px; }
main.settings > section { background: var(--surface); border: 1px solid var(--hair); border-radius: 10px; padding: 20px 22px 22px; }
main.settings > section > h2 { margin-bottom: 10px; }

/* ------------------------------------------------------------- dashboard */

main.dash { max-width: 1440px; margin: 0 auto; padding: 14px 16px 60px; display: grid; gap: 14px; }
.panel { background: var(--surface); border: 1px solid var(--hair); border-radius: 10px; padding: 16px 18px 18px; min-width: 0; }
.panel > h2 { margin-bottom: 2px; }
.panel > .sub { color: var(--ink-2); font-size: 13.5px; margin: 0 0 12px; }

#banner { display: grid; gap: 8px; }
#banner .msg { margin: 0; }

/* market strip */
.strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--hair); border: 1px solid var(--hair); border-radius: 10px; overflow: hidden; }
.tile { background: var(--surface); padding: 10px 14px 12px; min-width: 0; }
.tile .k { color: var(--ink-2); font-size: 13px; }
.tile .v { font-size: 21px; font-weight: 650; letter-spacing: -0.01em; line-height: 1.25; }
.tile .d { font-size: 13px; color: var(--ink-2); display: flex; gap: 6px; align-items: center; min-height: 20px; }
.mark { flex: none; width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; }
.mark.up { border-bottom: 8px solid var(--bull); }
.mark.down { border-top: 8px solid var(--bear); }
.mark.flat { width: 9px; height: 2px; border: 0; background: var(--muted); }

.cols { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 14px; align-items: start; }
.col { display: grid; gap: 14px; min-width: 0; }
@media (max-width: 1020px) { .cols { grid-template-columns: minmax(0, 1fr); } }

/* bias */
.bias-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 18px; }
.bias-label { font-size: clamp(30px, 5vw, 46px); font-weight: 700; letter-spacing: -0.025em; line-height: 1.05; }
.bias-score { font-size: clamp(30px, 5vw, 46px); font-weight: 300; letter-spacing: -0.02em; line-height: 1.05; color: var(--ink-2); }
.bias-note { color: var(--ink-2); margin: 6px 0 14px; }
.meter { position: relative; height: 70px; }
.meter .track { position: absolute; left: 0; right: 0; top: 10px; height: 12px; border-radius: 6px; background: var(--track); }
.meter .fill { position: absolute; top: 10px; height: 12px; }
.meter .fill.bull { background: var(--bull); border-radius: 0 6px 6px 0; }
.meter .fill.bear { background: var(--bear); border-radius: 6px 0 0 6px; }
.meter .needle { position: absolute; top: 3px; width: 4px; height: 26px; margin-left: -2px; border-radius: 2px; background: var(--ink); box-shadow: 0 0 0 2px var(--surface); }
.meter .tick { position: absolute; top: 8px; width: 1px; height: 16px; background: var(--axis); }
.meter .lbl { position: absolute; top: 32px; transform: translateX(-50%); font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.meter .lbl.first { transform: none; }
.meter .lbl.last { transform: translateX(-100%); }
.meter .lbl.zone { top: 50px; color: var(--ink-2); }
@media (max-width: 620px) { .meter { height: 54px; } .meter .lbl.zone { display: none; } }

/* factor ledger */
.ledger { display: grid; }
.ledger .group { font-size: 13px; font-weight: 600; color: var(--muted); padding: 14px 0 4px; border-bottom: 1px solid var(--axis); }
.ledger .group:first-child { padding-top: 4px; }
.frow { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(120px, 1fr) 62px; gap: 2px 14px; padding: 9px 0 10px; border-bottom: 1px solid var(--hair); align-items: center; }
.frow .name { font-weight: 600; }
.frow .val { color: var(--ink-2); font-size: 13.5px; }
.frow .pts { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.frow .why { grid-column: 1 / -1; color: var(--ink-2); font-size: 13.5px; max-width: 86ch; }
.frow.off .name, .frow.off .pts { color: var(--muted); font-weight: 500; }
.dbar { position: relative; height: 14px; }
.dbar::before { content: ""; position: absolute; left: 50%; top: -3px; bottom: -3px; width: 1px; background: var(--axis); }
.dbar .b { position: absolute; top: 0; height: 14px; min-width: 2px; }
.dbar .b.bull { left: 50%; margin-left: 1px; background: var(--bull); border-radius: 0 4px 4px 0; }
.dbar .b.bear { right: 50%; margin-right: 0; background: var(--bear); border-radius: 4px 0 0 4px; }
.dbar .zero { position: absolute; left: 50%; top: 4px; width: 7px; height: 7px; margin-left: -3px; border-radius: 50%; background: var(--muted); box-shadow: 0 0 0 2px var(--surface); }
.ledger-foot { color: var(--ink-2); font-size: 13.5px; margin-top: 12px; }
@media (max-width: 560px) {
  .frow { grid-template-columns: minmax(0, 1fr) 62px; }
  .frow .dbar { grid-column: 1 / -1; grid-row: 2; }
}

/* charts */
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 13px; color: var(--ink-2); margin: 0 0 8px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { width: 12px; height: 10px; border-radius: 2px; flex: none; }
.sw.bull { background: var(--bull); }
.sw.bear { background: var(--bear); }
.sw.line { height: 2px; border-radius: 1px; background: var(--spot); }
.sw.ink { height: 2px; border-radius: 1px; background: var(--ink); }
.chart { position: relative; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .cap { font-size: 13px; color: var(--ink-2); margin: 10px 0 2px; }
svg text { font-family: inherit; font-size: 11.5px; fill: var(--muted); font-variant-numeric: tabular-nums; }
svg .grid { stroke: var(--hair); stroke-width: 1; }
svg .base { stroke: var(--axis); stroke-width: 1; }
svg .spot { stroke: var(--spot); stroke-width: 2; fill: none; stroke-linejoin: round; stroke-linecap: round; }
svg .score { stroke: var(--ink); stroke-width: 2; fill: none; stroke-linejoin: round; stroke-linecap: round; }
svg .wash-bull { fill: var(--bull); opacity: 0.14; }
svg .wash-bear { fill: var(--bear); opacity: 0.14; }
svg .cross { stroke: var(--ink-2); stroke-width: 1; }
svg .enddot { stroke: var(--surface); stroke-width: 2; }
svg .enddot.spot-dot { fill: var(--spot); }
svg .enddot.score-dot { fill: var(--ink); }
svg .endlbl { fill: var(--ink); font-weight: 600; font-size: 12px; }

.tip {
  position: absolute; z-index: 5; pointer-events: none;
  background: var(--ink); color: var(--surface);
  padding: 7px 10px; border-radius: 6px; font-size: 12.5px; line-height: 1.45;
  white-space: nowrap; font-variant-numeric: tabular-nums;
}
.tip b { font-weight: 650; }
.tip .t { opacity: 0.75; }

/* OI by strike */
.oi { display: grid; gap: 2px; font-size: 13px; font-variant-numeric: tabular-nums; }
.oi .hd, .oi .r { display: grid; grid-template-columns: 58px minmax(0, 1fr) 88px minmax(0, 1fr) 58px; gap: 8px; align-items: center; }
.oi .hd { color: var(--ink-2); font-size: 12.5px; padding-bottom: 4px; border-bottom: 1px solid var(--axis); margin-bottom: 3px; }
.oi .hd :nth-child(3), .oi .r .k { text-align: center; }
.oi .hd :nth-child(2) { text-align: right; }
.oi .hd :nth-child(5), .oi .r .pc { text-align: right; }
.oi .r { border-radius: 4px; padding: 1px 0; }
.oi .r:hover, .oi .r:focus-visible { background: var(--row); }
.oi .r.atm { background: var(--row); }
.oi .r.atm .k { font-weight: 700; }
.oi .r .k { color: var(--ink); }
.oi .r .cc, .oi .r .pc { color: var(--ink-2); }
.oi .barL, .oi .barR { height: 14px; display: flex; }
.oi .barL { justify-content: flex-end; }
.oi .barL i, .oi .barR i { display: block; height: 14px; min-width: 2px; }
.oi .barL i { background: var(--bear); border-radius: 4px 0 0 4px; }
.oi .barR i { background: var(--bull); border-radius: 0 4px 4px 0; }
@media (max-width: 420px) { .oi .hd, .oi .r { grid-template-columns: 50px minmax(0, 1fr) 82px minmax(0, 1fr) 50px; gap: 5px; } }

/* levels */
.levels { display: grid; font-variant-numeric: tabular-nums; }
.lv { display: grid; grid-template-columns: 14px minmax(0, 1fr) auto 78px; gap: 10px; align-items: center; padding: 5px 0; border-bottom: 1px solid var(--hair); }
.lv .p { font-weight: 600; text-align: right; }
.lv .away { text-align: right; color: var(--ink-2); font-size: 13px; }
.lv .g { width: 9px; height: 9px; border-radius: 2px; background: var(--muted); justify-self: center; }
.lv.res .g { background: var(--bear); }
.lv.sup .g { background: var(--bull); }
.lv.now { background: var(--row); border-radius: 4px; border-bottom-color: transparent; font-weight: 700; margin: 2px -8px; padding: 6px 8px; }
.lv.now .g { background: var(--ink); border-radius: 50%; }

/* heavyweights */
.hv { display: grid; gap: 3px; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.hv .r { display: grid; grid-template-columns: 104px minmax(0, 1fr) 58px; gap: 10px; align-items: center; }
.hv .r .c { text-align: right; }

/* inputs */
.seg { display: inline-flex; border: 1px solid var(--axis); border-radius: 6px; overflow: hidden; }
.seg label { margin: 0; font-weight: 500; font-size: 14px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: block; padding: 6px 12px; cursor: pointer; border-left: 1px solid var(--axis); }
.seg label:first-child span { border-left: 0; }
.seg input:checked + span { background: var(--btn); color: var(--btn-ink); }
.seg input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: -2px; }
.field { margin-top: 12px; }
.field > .cap { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 4px; }
.check { display: flex; gap: 8px; align-items: center; font-weight: 500; font-size: 15px; margin: 12px 0 0; }
.result { margin-top: 12px; font-size: 15px; }
.result b { font-size: 19px; }
.saved { color: var(--ink-2); font-size: 13.5px; align-self: center; }

.foot { color: var(--muted); font-size: 13px; max-width: 110ch; }

@media (prefers-reduced-motion: no-preference) {
  .meter .needle, .meter .fill, .dbar .b { transition: left 0.35s ease, width 0.35s ease; }
}