/* Is This AI Pilot Worth It? — one stylesheet, no frameworks. */

:root {
  --navy: #004B8D;
  --navy-soft: #E8EFF7;
  --gold: #EAB234;
  --green: #206A5D;
  --green-soft: #D6E8E4;
  --red: #B3261E;
  --red-soft: #F4DCDA;
  --ink: #17212B;
  --muted: #5B6673;
  --line: #DCE2E9;
  --line-strong: #C3CDD8;
  --paper: #FFFFFF;
  --ground: #F5F7FA;
  --radius: 10px;
  color-scheme: light;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 32px 40px;
}

/* ---------- Title ---------- */

.top {
  border-bottom: 2px solid var(--navy);
  padding-bottom: 20px;
  margin-bottom: 32px;
}

.top h1 {
  margin: 0;
  color: var(--navy);
  font-size: 2.25rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.lede {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1.125rem;
}

/* ---------- Two columns: guesses on the left, answer on the right ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 468px) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.panel h2,
.results h2 {
  margin: 0 0 4px;
  font-size: 1.125rem;
  color: var(--navy);
}

.hint {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* ---------- The guesses table ---------- */

.guesses {
  width: 100%;
  border-collapse: collapse;
}

.guesses th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-align: center;
  padding: 0 4px 8px;
}

.guesses th.col-best { color: var(--navy); }

.guesses tbody tr { border-top: 1px solid var(--line); }

.guesses td {
  padding: 8px 4px;
  vertical-align: middle;
}

.guesses .row-label {
  padding-left: 0;
  padding-right: 12px;
  font-size: 0.9375rem;
  line-height: 1.3;
  text-wrap: balance;
}

.unit { color: var(--muted); white-space: nowrap; }

.guesses input,
.ramp input {
  width: 100%;
  min-width: 0;
  font: inherit;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 6px 8px;
}

.guesses td:not(.row-label) { width: 82px; }

/* Hide the tiny up/down arrows: they crowd the numbers. */
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.guesses input.best {
  border-color: var(--navy);
  font-weight: 600;
}

.guesses input:focus,
.ramp input:focus {
  outline: 2px solid var(--navy);
  outline-offset: 1px;
}

input[aria-invalid="true"] {
  border-color: var(--red) !important;
  background: #FDF6F5;
}

.ramp {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.9375rem;
}

.ramp input { width: 76px; flex: none; font-weight: 600; border-color: var(--navy); }

.note {
  margin-top: 16px;
  padding: 10px 12px;
  border-left: 3px solid var(--line-strong);
  background: var(--ground);
  color: var(--muted);
  font-size: 0.875rem;
}

.note p { margin: 0; }
.note p + p { margin-top: 4px; }
.note .blocking { color: var(--red); }

.reset {
  margin-top: 16px;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 0.875rem;
  color: var(--navy);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

/* ---------- The answer ---------- */

.results { min-width: 0; }

.figures {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.figure {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.figure-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.swatch { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.swatch-gold { background: var(--gold); }

.figure-value {
  margin-top: 4px;
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--navy);
}

.figure-value.is-long { font-size: 1.75rem; line-height: 1.25; padding: 6px 0; }
.figure-value.is-positive { color: var(--green); }
.figure-value.is-negative { color: var(--red); }
.figure-value.is-empty { color: var(--line-strong); }

.figure-sub {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.875rem;
}

/* ---------- Cards below the figures ---------- */

.card {
  margin-top: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px 24px;
}

.card h3 {
  margin: 0;
  font-size: 1.125rem;
  color: var(--navy);
}

.card-sub {
  margin: 4px 0 16px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* ---------- The running-total chart ---------- */

.chart { width: 100%; min-height: 240px; }
.chart svg { display: block; overflow: visible; }

.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .zero { stroke: #7D8894; stroke-width: 1.25; }
.chart .tick-label { fill: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.chart .area-up { fill: var(--green-soft); }
.chart .area-down { fill: var(--red-soft); }
.chart .line { fill: none; stroke: var(--navy); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart .payback-line { stroke: var(--gold); stroke-width: 2; }
.chart .payback-dot { fill: var(--gold); stroke: var(--paper); stroke-width: 2; }
.chart .payback-label { fill: var(--ink); font-size: 13px; font-weight: 600; }
.chart .payback-label-bg { fill: var(--paper); }

.chart-caption {
  margin: 12px 0 0;
  text-wrap: balance;
  color: var(--muted);
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

.chart-caption strong { color: var(--ink); font-weight: 600; }

/* ---------- The number to check first ---------- */

.verdict {
  margin: 0 0 20px;
  padding: 14px 18px;
  border-left: 3px solid var(--navy);
  background: var(--navy-soft);
  border-radius: 0 6px 6px 0;
}

.verdict[hidden] { display: none; }
.verdict p { margin: 0; text-wrap: balance; }

.verdict-first {
  font-size: 1.125rem;
  line-height: 1.45;
  color: var(--ink);
}

.verdict-first strong { color: var(--navy); }

.verdict-least {
  margin-top: 6px !important;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* ---------- Which number matters most (a "tornado" chart) ---------- */

.tornado {
  --worse: #E2A7A2;
  --better: #86B8AD;
  font-variant-numeric: tabular-nums;
}

.t-row {
  display: grid;
  grid-template-columns: minmax(120px, 170px) 84px minmax(0, 1fr) 84px;
  column-gap: 12px;
  align-items: stretch;
}

.t-head {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  align-items: end;
}

.t-head .t-track { height: 34px; }
.t-head .t-worse,
.t-head .t-better { padding-bottom: 6px; }

.t-name {
  align-self: center;
  padding: 10px 0;
  font-size: 0.9375rem;
  line-height: 1.3;
  text-wrap: balance;
}

.t-worse,
.t-better {
  align-self: center;
  font-size: 0.875rem;
  line-height: 1.25;
}

.t-worse { text-align: right; }
.t-better { text-align: left; }
.t-at { display: block; color: var(--muted); font-size: 0.8125rem; }

.t-track { position: relative; min-height: 44px; }

.t-bar {
  position: absolute;
  top: 50%;
  height: 20px;
  margin-top: -10px;
}

.t-bar.worse { background: var(--worse); border-radius: 4px 0 0 4px; }
.t-bar.better { background: var(--better); border-radius: 0 4px 4px 0; }

.t-best {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: var(--navy);
}

.t-zero {
  position: absolute;
  top: 0;
  bottom: 0;
  border-left: 1px dashed #7D8894;
}

.t-best-label {
  position: absolute;
  bottom: 6px;
  transform: translateX(-50%);
  white-space: nowrap;
  color: var(--navy);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.8125rem;
}

.t-row + .t-row:not(.t-head) .t-name { border-top: 1px solid var(--line); }
.t-head + .t-row .t-name { border-top: 0; }

/* ---------- Footer ---------- */

.foot {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
  text-wrap: balance;
}

/* ---------- Narrower screens ---------- */

@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .inputs { max-width: 560px; }
}

@media (max-width: 560px) {
  .page { padding: 28px 16px 32px; }
  .top { margin-bottom: 24px; }
  .top h1 { font-size: 1.75rem; }
  .lede { font-size: 1rem; }
  .panel { padding: 18px 16px; }

  /* Each guess becomes a label on its own line with three boxes beneath. */
  .guesses thead tr,
  .guesses tbody tr {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 8px;
  }
  .guesses thead .col-label { display: none; }
  .guesses tbody tr { padding: 10px 0 12px; }
  .guesses td { padding: 0; width: auto !important; }
  .guesses .row-label { grid-column: 1 / -1; padding: 0 0 6px; }

  .figures { gap: 12px; }
  .figure { padding: 16px; }
  .figure-value { font-size: 2rem; }
  .figure-value.is-long { font-size: 1.25rem; }
  .card { padding: 16px; }
  .chart { min-height: 200px; }

  .t-row { grid-template-columns: 72px minmax(0, 1fr) 72px; column-gap: 8px; }
  .t-name { grid-column: 1 / -1; padding: 12px 0 2px; }
  .t-head .t-name { display: none; }
  .t-track { min-height: 40px; }
}