/* Look Both Ways. Monochrome: a black stage that draws the result in characters, and a quiet form beside it. */

:root {
  --stage: #000;
  --paper: #fff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --fill: #f5f5f7;
  --thumb: #fff;
  --knob: #fff;
  --selected: #000;
  --on-selected: #fff;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.12), 0 0 0 0.5px rgb(0 0 0 / 0.06);
  --sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --pixel: "Geist Pixel", "Geist Mono", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #000;
    --text: #f5f5f7;
    --muted: #98989d;
    --line: #2c2c2e;
    --fill: #161617;
    --thumb: #3a3a3c;
    --knob: #f5f5f7;
    --selected: #f5f5f7;
    --on-selected: #000;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.5);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #000;
  --text: #f5f5f7;
  --muted: #98989d;
  --line: #2c2c2e;
  --fill: #161617;
  --thumb: #3a3a3c;
  --knob: #f5f5f7;
  --selected: #f5f5f7;
  --on-selected: #000;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.5);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 400 15px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* --- layout ---------------------------------------------------------------------------------- */
.app { display: grid; grid-template-columns: minmax(0, 7fr) minmax(400px, 5fr); min-height: 100svh; }
.stage {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100svh;
  overflow: hidden;
  background: var(--stage);
  color: #f5f5f7;
  container-type: inline-size;
}
.panel { min-width: 0; padding: 30px clamp(20px, 4vw, 56px) 96px; border-left: 1px solid var(--line); }

@media (max-width: 900px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .stage { position: relative; height: clamp(500px, 76svh, 680px); }
  .panel { border-left: 0; padding-top: 28px; }
}

/* --- stage ----------------------------------------------------------------------------------- */
#terrain { position: absolute; inset: 0; display: block; width: 100%; height: 100%; touch-action: pan-y; }

.hud {
  position: absolute;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 22px 24px;
  font: 500 11px/1.2 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgb(255 255 255 / 0.5);
  pointer-events: none;
}
.hud-top { top: 0; }
.hud-bottom { bottom: 0; transition: opacity 240ms ease-out; }
.hud-meta, .legend { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.legend b { font-weight: 400; color: #fff; margin-right: 4px; }
.legend b.dim { color: rgb(255 255 255 / 0.45); }
.wordmark {
  pointer-events: auto;
  font: 400 19px/1 var(--pixel);
  letter-spacing: 0;
  text-transform: none;
  color: #fff;
  text-decoration: none;
}

.answer { position: absolute; top: 74px; left: 24px; right: 24px; pointer-events: none; transition: opacity 240ms ease-out; }
.answer p { margin: 0; }
.answer-label { font: 400 15px/1.3 var(--sans); color: rgb(255 255 255 / 0.62); }
.answer-value {
  margin-top: 10px !important;
  font-family: var(--pixel);
  font-size: min(128px, calc((100cqw - 48px) / var(--chars, 7) * 1.4));
  line-height: 0.95;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.answer-sub { margin-top: 14px !important; font: 400 13px/1.4 var(--mono); color: rgb(255 255 255 / 0.62); }
.answer-sub .change { margin-left: 14px; color: #fff; }
.answer.is-empty .answer-value { color: rgb(255 255 255 / 0.22); }
.stage:not(.ready) .answer, .stage:not(.ready) .hud-bottom { opacity: 0; }

.stage-message {
  position: absolute;
  left: 24px;
  right: 24px;
  top: 60%;
  margin: 0;
  font: 500 12px/1.5 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
  color: rgb(255 255 255 / 0.7);
}

.loader {
  position: absolute;
  left: 24px;
  right: 24px;
  top: 50%;
  translate: 0 -50%;
  display: grid;
  justify-items: center;
  gap: 12px;
  font: 500 11px/1.2 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgb(255 255 255 / 0.6);
  transition: opacity 240ms ease-out;
}
.loader-bar { font-size: 14px; letter-spacing: 0.12em; color: #fff; }
.loader.done { opacity: 0; pointer-events: none; }

.readout {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  gap: 1px;
  padding: 8px 10px;
  border: 1px solid rgb(255 255 255 / 0.16);
  border-radius: 8px;
  background: rgb(0 0 0 / 0.8);
  font: 400 12px/1.4 var(--mono);
  color: rgb(255 255 255 / 0.65);
  white-space: nowrap;
  pointer-events: none;
}
.readout b { font-size: 14px; font-weight: 500; color: #fff; }

/* --- panel ----------------------------------------------------------------------------------- */
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 26px; }
.mode { flex: 0 1 260px; }
h1 {
  margin: 0;
  font: 600 clamp(32px, 3.3vw, 44px)/1.04 var(--sans);
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.intro { margin: 14px 0 26px; max-width: 46ch; font-size: 17px; line-height: 1.45; color: var(--muted); text-wrap: pretty; }
.theme {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: transform 160ms var(--ease-out);
}
.theme:active { transform: scale(0.94); }
.theme svg { width: 18px; height: 18px; }

fieldset { min-width: 0; margin: 0; padding: 26px 0 28px; border: 0; border-top: 1px solid var(--line); }
legend { float: left; width: 100%; margin: 0 0 14px; padding: 0; font: 500 15px/1.3 var(--sans); }
legend + * { clear: both; }
.hint { margin: 10px 0 0; font-size: 13px; line-height: 1.45; color: var(--muted); text-wrap: pretty; }
.hint:empty { display: none; }

/* amounts */
.amounts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.money { display: grid; gap: 4px; padding: 12px 14px; border-radius: 14px; background: var(--fill); cursor: text; }
.money:focus-within { box-shadow: 0 0 0 2px var(--text); }
.money-label { font-size: 13px; color: var(--muted); }
.money-field { display: flex; align-items: baseline; gap: 3px; font: 500 26px/1.15 var(--sans); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.money-field > span { color: var(--muted); }
.money input { width: 100%; min-width: 0; padding: 0; border: 0; outline: none; background: none; font: inherit; letter-spacing: inherit; }

/* segmented controls */
.segmented {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  padding: 2px;
  border-radius: 10px;
  background: var(--fill);
}
.segmented label {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  height: 32px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  transition: color 150ms ease;
}
.segmented label:has(:checked) { color: var(--text); }
.segmented label:has(:disabled) { opacity: 0.35; cursor: default; }
.segmented label:has(:focus-visible) { outline: 2px solid var(--text); outline-offset: -2px; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.seg-thumb {
  position: absolute;
  top: 2px;
  bottom: 2px;
  left: 2px;
  width: calc((100% - 4px) / var(--count));
  border-radius: 8px;
  background: var(--thumb);
  box-shadow: var(--shadow);
}
.segmented.ready .seg-thumb { transition: transform 240ms var(--ease-out), opacity 150ms ease; }

/* period */
.period { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin: 20px 0 2px; font: 500 14px/1.3 var(--mono); }
.period-length { font: 400 13px/1.3 var(--sans); color: var(--muted); }

input[type="range"] { -webkit-appearance: none; appearance: none; margin: 0; background: transparent; cursor: pointer; }
input[type="range"]:focus-visible { outline: none; }
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: transparent; }
input[type="range"]::-moz-range-track { height: 2px; background: transparent; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -9px;
  border-radius: 50%;
  background: var(--knob);
  box-shadow: 0 0 0 0.5px rgb(0 0 0 / 0.25), 0 2px 6px rgb(0 0 0 / 0.2);
  transition: transform 160ms var(--ease-out);
}
input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: 0;
  border-radius: 50%;
  background: var(--knob);
  box-shadow: 0 0 0 0.5px rgb(0 0 0 / 0.25), 0 2px 6px rgb(0 0 0 / 0.2);
}
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.15); }
input[type="range"]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 2px var(--paper), 0 0 0 4px var(--text); }
input[type="range"]:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 2px var(--paper), 0 0 0 4px var(--text); }
input[type="range"]:disabled { cursor: default; opacity: 0.4; }

.range { position: relative; height: 32px; }
.range-track { position: absolute; left: 10px; right: 10px; top: 15px; height: 2px; border-radius: 1px; background: var(--line); }
.range-fill { position: absolute; top: 0; bottom: 0; background: var(--text); }
.range input { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.range input::-webkit-slider-thumb { pointer-events: auto; }
.range input::-moz-range-thumb { pointer-events: auto; }

/* mix */
.mixbar { display: flex; gap: 3px; height: 24px; margin-bottom: 8px; overflow: hidden; border-radius: 6px; font: 20px/24px var(--mono); }
.mixbar span { flex: 1 1 0; min-width: 0; overflow: hidden; white-space: nowrap; transition: flex-grow 240ms var(--ease-out); }
.mix { margin: 0; padding: 0; list-style: none; }
.mix-row {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) minmax(96px, 1.2fr) 48px 28px;
  align-items: center;
  gap: 10px;
  min-height: 46px;
}
.mix-row + .mix-row { border-top: 1px solid var(--line); }
.mix-glyph { overflow: hidden; font: 13px/1 var(--mono); white-space: nowrap; }
.mix-name { overflow: hidden; font-weight: 500; text-overflow: ellipsis; white-space: nowrap; }
.mix-slider { width: 100%; height: 28px; }
input.mix-slider::-webkit-slider-runnable-track {
  background: linear-gradient(to right, var(--text) calc(10px + (100% - 20px) * var(--f, 0)), var(--line) 0);
}
input.mix-slider::-moz-range-track { background: var(--line); }
input.mix-slider::-moz-range-progress { height: 2px; background: var(--text); }
.mix-pct { display: flex; align-items: baseline; justify-content: flex-end; font: 500 15px/1 var(--mono); font-variant-numeric: tabular-nums; }
.mix-pct:focus-within { box-shadow: 0 1px 0 var(--text); }
.mix-pct input { width: 3ch; padding: 0; border: 0; outline: none; background: none; text-align: right; font: inherit; }
.mix-remove {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: transform 160ms var(--ease-out), background-color 150ms ease, color 150ms ease;
}
.mix-remove:active { transform: scale(0.9); }
.mix-actions { display: flex; justify-content: flex-end; min-height: 8px; margin: 4px 0 20px; }
.link {
  padding: 4px 0;
  border: 0;
  background: none;
  font-size: 13px;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
  cursor: pointer;
}

.picker { display: grid; gap: 18px; }
.picker-label { margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; }
.chip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 2px 8px;
  padding: 10px 12px 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  text-align: left;
  cursor: pointer;
  transition: transform 160ms var(--ease-out), background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.chip:active { transform: scale(0.97); }
.chip[aria-pressed="true"] { border-color: var(--selected); background: var(--selected); color: var(--on-selected); }
.chip-code { font: 500 13px/1.2 var(--mono); }
.chip-since { font: 400 11px/1.2 var(--mono); opacity: 0.55; }
.chip-name { grid-column: 1 / -1; overflow: hidden; font-size: 13px; line-height: 1.3; text-overflow: ellipsis; white-space: nowrap; opacity: 0.65; }
.chip-spark { grid-column: 1 / -1; margin-top: 6px; overflow: hidden; font: 12px/1 var(--mono); white-space: nowrap; opacity: 0.8; }

@media (hover: hover) and (pointer: fine) {
  .chip:hover { border-color: var(--text); }
  .mix-remove:hover { background: var(--fill); color: var(--text); }
  .link:hover { text-decoration-color: currentColor; }
}

/* details */
.details { padding-top: 28px; border-top: 1px solid var(--line); }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 22px 18px; margin: 0; }
.stats div { min-width: 0; }
.stats dt { font-size: 13px; color: var(--muted); }
.stats dd { margin: 4px 0 0; font: 500 21px/1.15 var(--mono); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stats dd.help { margin-top: 5px; font: 400 12px/1.4 var(--sans); letter-spacing: 0; color: var(--muted); }
.inflation { max-width: 62ch; margin: 26px 0 0; font-size: 15px; line-height: 1.6; color: var(--muted); text-wrap: pretty; }
.table-wrap { margin-top: 24px; overflow-x: auto; }
.breakdown { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
.breakdown th { padding: 0 0 8px; font-size: 12px; font-weight: 500; color: var(--muted); text-align: right; white-space: nowrap; }
.breakdown td { padding: 10px 0; border-top: 1px solid var(--line); font: 400 13px var(--mono); text-align: right; white-space: nowrap; }
.breakdown th:first-child, .breakdown td:first-child { text-align: left; }
.breakdown td:first-child { font: 500 14px var(--sans); }
.breakdown th + th, .breakdown td + td { padding-left: 14px; }
.breakdown .glyph { margin-right: 10px; font: 400 13px var(--mono); }

.method { max-width: 64ch; margin-top: 24px; font-size: 13px; line-height: 1.55; color: var(--muted); }
.method p { margin: 0 0 10px; }
.method:empty { display: none; }

.notes { max-width: 64ch; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.55; color: var(--muted); }
.notes p { margin: 0 0 10px; }

/* small-screen dock that keeps the answer in reach while the stage is scrolled away */
.dock { display: none; }
@media (max-width: 900px) {
  .dock {
    position: fixed;
    z-index: 10;
    left: 12px;
    right: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 14px 18px;
    border: 1px solid rgb(255 255 255 / 0.14);
    border-radius: 16px;
    background: #000;
    color: rgb(255 255 255 / 0.62);
    font-size: 13px;
    cursor: pointer;
    transition: transform 240ms var(--ease-out), opacity 200ms ease-out;
  }
  .dock b { font: 400 22px/1 var(--pixel); color: #fff; }
  .dock-change { margin-left: auto; font-family: var(--mono); color: #fff; }
  .dock[data-hidden] { transform: translateY(calc(100% + 24px)); opacity: 0; pointer-events: none; }
}

@media (max-width: 520px) {
  .hud { padding: 18px 20px; }
  .hud-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .answer { top: 64px; left: 20px; right: 20px; }
}

@media (max-width: 440px) {
  .amounts { grid-template-columns: 1fr; }
  .mix-row { grid-template-columns: 22px minmax(0, 1fr) minmax(80px, 1fr) 44px 28px; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .seg-thumb, .chip, .theme, .mix-remove, .mixbar span, .dock, .answer, .hud-bottom, .loader { transition: none !important; }
}