/* Costs Simulator styles - Metric frontend theme.
   Tokens mirror metric-frontend src/styles/metric-theme.css (dark only, cyan accent,
   Inter for text, Gridnik for every figure, 20px cards on hairline borders). The
   older token names (--surface-1, --text-muted, --series-*) are kept as aliases
   because the chart code reads them through cssVar(). */
@font-face {
  font-family: 'Inter';
  src: url('fonts/inter-variable.ttf') format('truetype-variations');
  font-display: swap;
  font-style: normal;
  font-weight: 100 900;
}
@font-face {
  font-family: 'Gridnik';
  src: url('fonts/gridnik-medium.otf') format('opentype');
  font-display: swap;
  font-style: normal;
  font-weight: 500;
  unicode-range: U+0020-007E;
}

:root {
  color-scheme: dark;

  /* Metric frontend tokens */
  --metric-cyan: #84e0f7;
  --metric-cyan-hover: #9ce7fa;
  --bg: #161616;
  --bg-elev: #1b1b1b;
  --bg-inline: rgb(255 255 255 / 4%);
  --hairline: rgb(255 255 255 / 6%);
  --hairline-strong: rgb(255 255 255 / 10%);
  --fg: #ffffff;
  --fg-strong: rgb(255 255 255 / 92%);
  --fg-default: rgb(255 255 255 / 78%);
  --fg-muted: rgb(255 255 255 / 55%);
  --fg-dim: rgb(255 255 255 / 45%);
  --fg-faint: rgb(255 255 255 / 30%);
  --fg-on-cyan: #161616;
  --gray-450: #4d4d52;
  --gray-500: #343337;
  --gray-550: #272729;
  --neutral-50: #f3f3f3;
  --aquamarine-200: #4bdfe5;
  --aquamarine-250: #1ed7de;
  --aquamarine-300: #18acb2;
  --status-success: #3cc88c;
  --status-warning: #e2b341;
  --status-error: #e2004f;
  --status-error-soft: #ff8a8a;
  --zone-prop: #8b5cf6;
  --r-button: 10px;
  --r-chip: 14px;
  --r-card: 20px;
  --r-pill: 9999px;
  --shadow-popover: 0 14px 36px rgb(0 0 0 / 55%);
  --ease-out: cubic-bezier(0.22, 0.9, 0.32, 1);
  --font-ui: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-num: 'Gridnik', 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-num-track: -0.05em;

  /* simulator names, mapped onto the tokens above (read by the chart JS) */
  --page: var(--bg);
  --surface-1: #1f1f1f;            /* --bg-inline flattened over --bg, for chart marker rims */
  --text-primary: var(--fg);
  --text-secondary: var(--fg-default);
  --text-muted: var(--fg-dim);
  --grid: rgb(255 255 255 / 6%);
  --baseline: rgb(255 255 255 / 18%);
  --border: var(--hairline);
  --tooltip-bg: var(--bg-elev);

  --series-rev: var(--metric-cyan);         /* owner revenue curve */
  --series-avg: var(--fg-dim);              /* gross P&L reference */
  --series-margin: var(--zone-prop);        /* margin curve, LP share */
  --series-mr: var(--status-warning);       /* marginal revenue */
  --cost: var(--status-error-soft);         /* cost line */
  --good: var(--status-success);
  --bad: var(--status-error);
  --wash-good: rgb(60 200 140 / 10%);
  --wash-bad: rgb(226 0 79 / 12%);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--bg); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--fg);
  padding: 40px 24px 48px;
  min-width: 320px;
}
::selection { background: rgb(132 224 247 / 28%); }
:focus-visible { outline: 2px solid rgb(132 224 247 / 50%); outline-offset: 2px; }

.sim-nav { margin: 0 0 10px; font-size: 13px; }
.sim-nav a { color: var(--metric-cyan); text-decoration: underline transparent; text-underline-offset: 4px; transition: text-decoration-color 220ms var(--ease-out); }
.sim-nav a:hover { text-decoration-color: currentColor; }

.page { max-width: 1440px; margin: 0 auto; }
h1 {
  font-size: 32px; font-weight: 500; line-height: 1; letter-spacing: -0.01em;
  color: var(--fg);
}
.intro { color: var(--fg-muted); font-size: 14px; line-height: 1.6; margin-top: 14px; max-width: 920px; }
.intro b { color: var(--fg-default); font-weight: 600; }
.subtitle { color: var(--fg-dim); font-size: 12px; margin-top: 10px; max-width: 980px; }
.subtitle code {
  font-family: var(--font-ui); font-size: 11.5px; background: var(--bg-inline);
  border: 1px solid var(--hairline); border-radius: 6px; padding: 1px 6px;
}

.layout { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 18px; margin-top: 28px; align-items: start; }
@media (max-width: 1080px) { .layout { grid-template-columns: minmax(0, 1fr); } }

/* ---- sidebar ---- */
.sidebar {
  background: var(--bg-inline); border: 1px solid var(--hairline); border-radius: var(--r-card);
  padding: 8px 20px 20px;
}
.group { padding: 16px 0 18px; }
.group + .group { border-top: 1px solid var(--hairline); }
.group h3 {
  font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--fg-dim); margin-bottom: 14px; line-height: 1;
}
.ctl { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.ctl:last-child { margin-bottom: 0; }
.ctl > label, .ctl > .lbl {
  font-size: 13px; font-weight: 500; color: var(--fg-default); line-height: 1.3;
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px;
}
.ctl output {
  font-family: var(--font-num); font-weight: 500; letter-spacing: var(--font-num-track);
  font-variant-numeric: tabular-nums; color: var(--fg); white-space: nowrap; font-size: 14px;
}
select, input[type=number] {
  font-family: var(--font-ui); font-size: 13.5px; font-weight: 500; color: var(--fg); width: 100%;
  height: 36px; padding: 0 12px;
  background: rgb(255 255 255 / 3%); border: 1px solid rgb(255 255 255 / 9%); border-radius: var(--r-button);
  caret-color: var(--metric-cyan); outline: none;
  transition: border-color 200ms, background 200ms;
}
input[type=number] { font-family: var(--font-num); letter-spacing: -0.02em; }
select {
  appearance: none; -webkit-appearance: none; cursor: pointer; padding-right: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-opacity='0.55' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
select option { background: var(--bg-elev); color: var(--fg); }
select:hover, input[type=number]:hover { border-color: rgb(255 255 255 / 16%); }
select:focus, input[type=number]:focus { background-color: rgb(255 255 255 / 4.5%); border-color: rgb(132 224 247 / 45%); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* range - the app's percentage-slider: hairline track, white-core cyan-ring thumb */
input[type=range] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 22px;
  background: transparent; cursor: pointer; outline: none;
}
input[type=range]::-webkit-slider-runnable-track { height: 4px; border-radius: var(--r-pill); background: var(--hairline-strong); }
input[type=range]::-moz-range-track { height: 4px; border-radius: var(--r-pill); background: var(--hairline-strong); }
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 18px; height: 18px; margin-top: -7px; border: none; border-radius: 50%;
  background: radial-gradient(circle at center, var(--neutral-50) 0 4px, var(--aquamarine-300) 4px 9px);
  transition: transform 140ms ease;
}
input[type=range]::-moz-range-thumb {
  width: 18px; height: 18px; border: none; border-radius: 50%;
  background: radial-gradient(circle at center, var(--neutral-50) 0 4px, var(--aquamarine-300) 4px 9px);
}
input[type=range]:not(:disabled):hover::-webkit-slider-thumb { background: radial-gradient(circle at center, var(--neutral-50) 0 4px, var(--aquamarine-250) 4px 9px); transform: scale(1.08); }
input[type=range]:not(:disabled):active::-webkit-slider-thumb { background: radial-gradient(circle at center, var(--neutral-50) 0 4px, var(--aquamarine-200) 4px 9px); }
input[type=range]:not(:disabled):hover::-moz-range-thumb { background: radial-gradient(circle at center, var(--neutral-50) 0 4px, var(--aquamarine-250) 4px 9px); }
input[type=range]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 3px rgb(165 239 242 / 32%); }
input[type=range]:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 3px rgb(165 239 242 / 32%); }
input[type="range"]:disabled { opacity: 0.4; cursor: not-allowed; }

/* segmented controls - the app's tab pill: inline track, gray-500 pill on the active option */
.seg, .scale-seg {
  display: flex; gap: 2px; padding: 3px; width: 100%;
  background: var(--bg-inline); border: 1px solid var(--hairline); border-radius: var(--r-pill);
}
.scale-seg { display: inline-flex; width: auto; }
.seg button, .scale-seg button {
  font-family: var(--font-ui); font-size: 13px; font-weight: 500; line-height: 1;
  height: 30px; padding: 0 10px; flex: 1; white-space: nowrap; cursor: pointer;
  background: transparent; color: var(--fg-dim); border: none; border-radius: var(--r-pill);
  transition: background-color 220ms var(--ease-out), color 140ms;
}
.scale-seg button { padding: 0 14px; }
.seg button:not([aria-pressed="true"]):not(:disabled):hover,
.scale-seg button:not([aria-pressed="true"]):hover { color: var(--fg-default); }
.seg button[aria-pressed="true"], .scale-seg button[aria-pressed="true"] {
  background: var(--gray-500); color: var(--fg); font-weight: 600;
}
.seg button[aria-pressed="true"]:hover, .scale-seg button[aria-pressed="true"]:hover { background: var(--gray-450); }
.seg button:disabled { opacity: 0.4; cursor: not-allowed; }

details.adv { margin-top: 6px; }
details.adv summary, details.margins > summary {
  list-style: none; display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none;
}
details.adv summary::-webkit-details-marker, details.margins > summary::-webkit-details-marker { display: none; }
details.adv summary::before, details.margins > summary::before {
  content: ''; width: 6px; height: 6px; flex: none; margin: 0 2px 0 1px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg); transition: transform 220ms var(--ease-out);
}
details[open].adv > summary::before, details[open].margins > summary::before { transform: rotate(45deg); }
details.adv summary {
  font-size: 12.5px; font-weight: 500; color: var(--metric-cyan); margin-bottom: 12px; line-height: 1.35;
}
details.adv summary:hover { color: var(--metric-cyan-hover); }

.vol-group {
  margin-top: 4px; padding: 14px 14px 10px; border-radius: var(--r-chip);
  background: rgb(132 224 247 / 6%); border: 1px solid rgb(132 224 247 / 14%);
}
.vol-group .ctl > label { font-size: 13px; color: var(--fg); font-weight: 600; }
.vol-group output { font-size: 20px; color: var(--metric-cyan); }

.ctl .warn { display: none; font-size: 12px; line-height: 1.4; color: var(--status-warning); margin-top: 2px; }
.ctl .warn.on { display: block; }

.help {
  display: inline-flex; align-items: center; justify-content: center;
  width: 15px; height: 15px; border-radius: 50%; flex: none;
  border: 1px solid var(--fg-faint); color: var(--fg-dim);
  font-size: 9.5px; font-weight: 600; cursor: help; user-select: none;
  vertical-align: 1px; margin-left: 3px; transition: color 140ms, border-color 140ms;
}
.help:hover { color: var(--metric-cyan); border-color: rgb(132 224 247 / 60%); }
.helptip {
  position: fixed; z-index: 20; max-width: 280px; display: none; pointer-events: none;
  background: var(--bg-elev); border: 1px solid var(--hairline-strong); border-radius: 12px;
  padding: 10px 12px; font-size: 12px; line-height: 1.5; color: var(--fg-default); white-space: pre-line;
  box-shadow: var(--shadow-popover);
}

/* ---- right column ---- */
.gas-readout {
  display: none;
  font-size: 11px; color: var(--fg-dim); line-height: 1.5; word-break: break-word;
  margin-bottom: 12px; padding: 8px 12px;
  background: var(--bg-inline); border: 1px solid var(--hairline); border-radius: 12px;
}
.gas-readout b { color: var(--fg-default); font-weight: 600; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 18px; }
.tile {
  background: var(--bg-inline); border: 1px solid var(--hairline); border-radius: var(--r-card);
  padding: 16px 18px 15px; min-width: 0;
  display: grid; grid-row: span 3; grid-template-rows: subgrid; row-gap: 0; align-content: start;
}
.tile .lbl { font-size: 13px; font-weight: 500; color: var(--fg-muted); line-height: 1.3; }
.tile .val {
  font-family: var(--font-num); font-weight: 500; font-size: 26px; line-height: 1;
  letter-spacing: var(--font-num-track); font-variant-numeric: tabular-nums;
  color: var(--fg); margin-top: 12px; align-self: end;
}
.tile .sub { font-size: 12px; color: var(--fg-dim); margin-top: 8px; line-height: 1.4; align-self: start; }

.card {
  background: var(--bg-inline); border: 1px solid var(--hairline);
  border-radius: var(--r-card); padding: 22px 24px 12px; position: relative; min-width: 0;
}
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.card h2 { font-size: 16px; font-weight: 500; line-height: 1.2; color: var(--fg); }
.card .desc { font-size: 13px; color: var(--fg-muted); margin-top: 6px; line-height: 1.5; max-width: 760px; }
.legend { display: flex; gap: 18px; margin: 16px 0 6px; flex-wrap: wrap; }
.legend .lg { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--fg-muted); }
.legend .lg .key-line { width: 16px; height: 0; border-top: 2.5px solid var(--series-rev); border-radius: 2px; }
.legend .lg .key-dash { width: 16px; height: 0; border-top: 2.5px dashed var(--cost); }
.legend .lg .key-rect { width: 11px; height: 11px; border-radius: 3px; border: 1px solid var(--hairline-strong); }
svg { display: block; width: 100%; height: auto; }
svg text { font-family: var(--font-ui); }
.tick { fill: var(--fg-dim); font-family: var(--font-num); font-size: 11.5px; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.dlabel { fill: var(--fg-default); font-size: 12px; font-weight: 600; }

details.margins { margin-top: 18px; }
details.margins > summary {
  font-size: 14px; font-weight: 500; color: var(--fg-default);
  padding: 16px 20px; background: var(--bg-inline); border: 1px solid var(--hairline); border-radius: var(--r-card);
  transition: border-color 200ms, color 140ms;
}
details.margins > summary:hover { color: var(--fg); border-color: var(--hairline-strong); }
.margin-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; margin-top: 18px; }
@media (min-width: 1400px) { .margin-grid { grid-template-columns: 1fr 1fr; } }

.tooltip {
  position: fixed; pointer-events: none; z-index: 10;
  background: var(--bg-elev); border: 1px solid var(--hairline-strong);
  border-radius: 12px; padding: 10px 12px;
  box-shadow: var(--shadow-popover);
  font-size: 12px; display: none; min-width: 180px;
}
.tooltip .tt-x { color: var(--fg-dim); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.tooltip .tt-row { display: flex; align-items: center; gap: 8px; margin-top: 5px; }
.tooltip .tt-key { width: 12px; height: 0; border-top: 2.5px solid; border-radius: 2px; flex: none; }
.tooltip .tt-val { font-family: var(--font-num); font-weight: 500; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; color: var(--fg); }
.tooltip .tt-name { color: var(--fg-muted); }

.foot { margin-top: 18px; font-size: 12px; color: var(--fg-dim); max-width: 980px; line-height: 1.6; }
.foot p + p { margin-top: 8px; }
.foot b { color: var(--fg-default); font-weight: 600; }

@media (max-width: 640px) {
  body { padding: 28px 16px 40px; }
  h1 { font-size: 26px; }
  .card { padding: 18px 16px 10px; }
  .tiles { grid-template-columns: 1fr 1fr; }
  .tile .val { font-size: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}