/* Review-Theme Demand Pulse — editorial / data-ink direction.
   Warm paper, serif display voice, hairline rules, quiet chrome so the data
   is the loudest thing on the page. Chart tokens follow the dataviz palette. */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --chart-surface: #fcfcfb;
  --ink-1: #0b0b0b;
  --ink-2: #52514e;
  --ink-3: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --series-1: #2a78d6;
  --series-1-hover: #5598e7;
  --pole-neg: #e34948;
  --pole-mid: #c3c2b7;
  --pole-pos: #2a78d6;
  --accent: #17457e; /* deep ink-blue for brand marks */
  --accent-2: #eb6834;
  --wash: #eef3f9;
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.05), 0 8px 28px rgba(11, 11, 11, 0.07);
  --serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme='light'])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --chart-surface: #1a1a19;
    --ink-1: #ffffff;
    --ink-2: #c3c2b7;
    --ink-3: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --series-1: #3987e5;
    --series-1-hover: #6da7ec;
    --pole-neg: #e66767;
    --pole-mid: #383835;
    --pole-pos: #3987e5;
    --accent: #9ec5f4;
    --accent-2: #eb6834;
    --wash: #14202e;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 28px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink-1);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
h1, h2, h3 { font-family: var(--serif); font-weight: 560; line-height: 1.08; letter-spacing: -0.01em; margin: 0; }
p { margin: 0; }
a { color: var(--accent); text-underline-offset: 3px; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--series-1); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--surface); padding: 10px 16px; z-index: 99; }
.skip:focus { left: 12px; top: 12px; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }

/* ---------------------------------------------------------------- header -- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--grid);
}
.site-head .container { display: flex; align-items: center; gap: 28px; height: 62px; }
.wordmark { font-family: var(--serif); font-size: 21px; font-weight: 600; color: var(--ink-1); text-decoration: none; display: flex; align-items: baseline; gap: 8px; }
.wordmark .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent-2); display: inline-block; transform: translateY(-1px); }
.site-nav { display: flex; gap: 22px; margin-left: auto; }
.site-nav a { color: var(--ink-2); text-decoration: none; font-size: 14.5px; }
.site-nav a:hover { color: var(--ink-1); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ink-1);
  background: var(--ink-1);
  color: var(--page);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn.ghost { background: transparent; color: var(--ink-1); border-color: var(--baseline); }
.btn.ghost:hover { border-color: var(--ink-1); }
.btn.small { padding: 7px 14px; font-size: 14px; }
.btn[data-done]::after { content: '✓'; }

/* ------------------------------------------------------------------ hero -- */
.hero { padding: 84px 0 66px; border-bottom: 1px solid var(--grid); position: relative; overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 7fr 5fr; gap: 56px; align-items: center; }
.kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 20px; }
.hero h1 { font-size: clamp(38px, 5.2vw, 62px); }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero .lede { margin: 24px 0 0; font-size: 18.5px; color: var(--ink-2); max-width: 34em; }
.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; align-items: center; }
.hero-note { font-size: 13.5px; color: var(--ink-3); margin-top: 12px; }

/* specimen card (static preview of the output) */
.specimen {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 22px 22px 18px;
  transform: rotate(0.6deg);
}
.specimen .spec-head { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--grid); padding-bottom: 12px; margin-bottom: 14px; }
.specimen .spec-head strong { font-family: var(--serif); font-size: 17px; }
.spec-row { display: grid; grid-template-columns: 108px 1fr 34px; gap: 10px; align-items: center; margin: 11px 0; }
.spec-row .bar { height: 13px; border-radius: 0 4px 4px 0; background: linear-gradient(to right, var(--series-1) calc(var(--w) - 4px), transparent var(--w)); }
.spec-row .lab { font-size: 12.5px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.spec-row .val { font-family: var(--mono); font-size: 12px; color: var(--ink-1); text-align: right; }
.spec-foot { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--grid); font-size: 12px; color: var(--ink-3); font-family: var(--mono); }

/* --------------------------------------------------------------- problem -- */
.problem { padding: 66px 0; border-bottom: 1px solid var(--grid); background: var(--surface); }
.sec-tag { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.problem h2 { font-size: clamp(28px, 3.4vw, 40px); max-width: 20em; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.quote { border-left: 2px solid var(--accent-2); padding: 4px 0 4px 18px; }
.quote p { font-family: var(--serif); font-style: italic; font-size: 17px; line-height: 1.45; color: var(--ink-1); }
.quote cite { display: block; margin-top: 10px; font-style: normal; font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); }
.problem .fine { margin-top: 26px; font-size: 13px; color: var(--ink-3); }

/* --------------------------------------------------------------- how it --- */
.how { padding: 66px 0; border-bottom: 1px solid var(--grid); }
.how h2 { font-size: clamp(28px, 3.4vw, 40px); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 40px; counter-reset: step; }
.step { padding: 26px 28px 30px; border: 1px solid var(--grid); margin-right: -1px; margin-bottom: -1px; background: var(--surface); }
.step:nth-child(1) { border-radius: 12px 0 0 12px; }
.step:nth-child(3) { border-radius: 0 12px 12px 0; }
.step .n { font-family: var(--mono); font-size: 12px; color: var(--accent-2); letter-spacing: 0.1em; }
.step h3 { font-size: 20px; margin: 12px 0 10px; font-family: var(--sans); font-weight: 650; letter-spacing: 0; }
.step p { font-size: 14.5px; color: var(--ink-2); }

/* ------------------------------------------------------------------ tool -- */
.tool { padding: 70px 0; border-bottom: 1px solid var(--grid); background: var(--surface); }
.tool h2 { font-size: clamp(28px, 3.4vw, 40px); }
.tool > .container > .lede { color: var(--ink-2); margin-top: 14px; max-width: 44em; }

.tool-shell { margin-top: 36px; border: 1px solid var(--border); border-radius: 16px; background: var(--page); box-shadow: var(--shadow); overflow: hidden; }
.tool-bar { display: flex; align-items: center; gap: 10px; padding: 13px 18px; border-bottom: 1px solid var(--grid); background: var(--surface); }
.tool-bar .dots { display: flex; gap: 6px; }
.tool-bar .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--grid); display: block; }
.tool-bar .path { font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin-left: 8px; }

.tabs { display: flex; gap: 6px; padding: 14px 18px 0; }
.tab {
  border: 1px solid transparent;
  background: none;
  padding: 9px 16px;
  border-radius: 9px 9px 0 0;
  color: var(--ink-2);
  font-size: 14.5px;
  font-weight: 550;
  border-bottom: none;
}
.tab[aria-selected='true'] { background: var(--surface); border-color: var(--grid); color: var(--ink-1); margin-bottom: -1px; position: relative; z-index: 2; border-bottom: 1px solid var(--surface); }
.tab-panel { padding: 22px 18px 26px; background: var(--surface); border-top: 1px solid var(--grid); }
.tab-panel[hidden] { display: none; }

.field-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 180px; }
.field.grow { flex: 3; min-width: 260px; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--ink-2); letter-spacing: 0.02em; }
.field select, .field input, .field textarea {
  font: 15px var(--sans);
  color: var(--ink-1);
  background: var(--page);
  border: 1px solid var(--baseline);
  border-radius: 8px;
  padding: 10px 12px;
}
.field textarea { min-height: 150px; resize: vertical; font-family: var(--mono); font-size: 13px; line-height: 1.5; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--series-1); }
.hint { font-size: 12.5px; color: var(--ink-3); margin-top: 10px; }
.hint a { color: var(--ink-2); }
.import-warn { font-size: 12.5px; color: var(--accent-2); margin-top: 8px; min-height: 1em; }

.tool-actions { display: flex; gap: 12px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.tool-status { font-family: var(--mono); font-size: 12.5px; color: var(--accent); }

.error-box { margin-top: 16px; border: 1px solid color-mix(in srgb, var(--pole-neg) 45%, var(--surface)); background: color-mix(in srgb, var(--pole-neg) 7%, var(--surface)); border-radius: 10px; padding: 14px 16px; }
.error-box strong { display: block; font-size: 14.5px; }
.error-box span { font-size: 13px; color: var(--ink-2); }

/* --------------------------------------------------------------- results -- */
#results[hidden] { display: none; }
#results { padding: 26px 18px 30px; border-top: 1px solid var(--grid); transition: opacity 0.2s; }
#results.is-loading { opacity: 0.55; }
.res-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.res-head h3 { font-size: 24px; }
.res-head .sub { color: var(--ink-2); font-size: 14px; }
.badge { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; padding: 4px 9px; border-radius: 999px; border: 1px solid var(--baseline); color: var(--ink-2); }
.badge-live { border-color: color-mix(in srgb, var(--series-1) 55%, var(--surface)); color: var(--accent); background: color-mix(in srgb, var(--series-1) 8%, var(--surface)); }
.badge-sample { border-color: color-mix(in srgb, var(--accent-2) 55%, var(--surface)); color: color-mix(in srgb, var(--accent-2) 80%, var(--ink-1)); background: color-mix(in srgb, var(--accent-2) 8%, var(--surface)); }

.tiles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin: 22px 0; }
.tile { background: var(--page); border: 1px solid var(--grid); border-radius: 11px; padding: 14px 16px; }
.tile .lab { font-size: 12px; color: var(--ink-3); }
.tile .val { font-size: 30px; font-weight: 640; margin-top: 2px; color: var(--ink-1); }
.tile .sub { font-size: 11.5px; color: var(--ink-3); }

.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.chart-card { position: relative; background: var(--chart-surface); border: 1px solid var(--grid); border-radius: 12px; padding: 16px 18px 10px; }
.chart-card.wide { grid-column: 1 / -1; }
.chart-card h4 { font-family: var(--sans); font-size: 13px; font-weight: 650; letter-spacing: 0.01em; margin: 0 0 4px; }
.chart-card .chart-sub { font-size: 12px; color: var(--ink-3); margin: 0 0 10px; }
.chart-tip {
  position: absolute;
  transform: translate(-50%, -100%);
  background: var(--ink-1);
  color: var(--page);
  padding: 7px 11px;
  border-radius: 8px;
  font-size: 12.5px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  white-space: nowrap;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.chart-tip strong { font-weight: 650; }
.chart-tip span { opacity: 0.75; font-size: 11.5px; }
.legend { display: flex; gap: 16px; margin: 2px 0 10px; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }

details.table-twin { margin-top: 8px; border-top: 1px dashed var(--grid); padding-top: 8px; }
details.table-twin summary { font-size: 12px; color: var(--ink-3); cursor: pointer; user-select: none; }
.data-table { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-top: 8px; font-variant-numeric: tabular-nums; }
.data-table th { text-align: left; font-weight: 600; color: var(--ink-2); border-bottom: 1px solid var(--baseline); padding: 4px 10px 4px 0; }
.data-table td { border-bottom: 1px solid var(--grid); padding: 4px 10px 4px 0; color: var(--ink-1); }

.theme-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.theme-card { background: var(--page); border: 1px solid var(--grid); border-radius: 12px; padding: 18px 20px; }
.theme-card header { display: flex; align-items: baseline; gap: 12px; }
.theme-rank { font-family: var(--mono); font-size: 12px; color: var(--accent-2); }
.theme-card h4 { font-size: 18.5px; margin: 0; flex: 1; }
.theme-stats { list-style: none; display: flex; gap: 20px; padding: 0; margin: 12px 0 4px; flex-wrap: wrap; }
.theme-stats li { display: flex; flex-direction: column; }
.theme-stats strong { font-size: 15px; font-weight: 650; }
.theme-stats span { font-size: 11.5px; color: var(--ink-3); }
.theme-card blockquote { margin: 12px 0 0; border-left: 2px solid var(--baseline); padding-left: 14px; }
.theme-card blockquote p { font-size: 13.5px; color: var(--ink-2); font-style: italic; line-height: 1.5; }
.theme-card blockquote cite { display: block; margin-top: 5px; font-style: normal; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }

.res-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; align-items: center; }
.method-note { font-size: 12px; color: var(--ink-3); margin-top: 14px; max-width: 60em; }
.empty-note { font-size: 13px; color: var(--ink-3); border: 1px dashed var(--grid); border-radius: 8px; padding: 14px 16px; margin: 6px 0; }

/* --------------------------------------------------------------- pricing -- */
.pricing { padding: 76px 0; border-bottom: 1px solid var(--grid); }
.pricing h2 { font-size: clamp(28px, 3.4vw, 40px); }
.price-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 26px; margin-top: 38px; align-items: start; }
.price-card { border: 1.5px solid var(--ink-1); border-radius: 16px; padding: 30px 30px 26px; background: var(--surface); box-shadow: var(--shadow); }
.price-card .per { font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-2); }
.price-card .amount { font-size: 58px; font-weight: 640; letter-spacing: -0.02em; margin: 8px 0 2px; font-family: var(--sans); }
.price-card .amount small { font-size: 17px; font-weight: 500; color: var(--ink-2); letter-spacing: 0; }
.price-card ul { list-style: none; padding: 0; margin: 20px 0 24px; }
.price-card li { padding: 7px 0 7px 26px; position: relative; font-size: 14.5px; color: var(--ink-2); border-bottom: 1px solid var(--grid); }
.price-card li:last-child { border-bottom: none; }
.price-card li::before { content: '→'; position: absolute; left: 2px; color: var(--accent-2); }
.price-anchor { font-size: 13px; color: var(--ink-3); margin-top: 16px; line-height: 1.55; }
.pricing-notes { display: flex; flex-direction: column; gap: 14px; }
.pnote { background: var(--surface); border: 1px solid var(--grid); border-radius: 12px; padding: 18px 20px; }
.pnote h3 { font-family: var(--sans); font-size: 14.5px; font-weight: 650; letter-spacing: 0; margin-bottom: 6px; }
.pnote p { font-size: 13.5px; color: var(--ink-2); }

/* ------------------------------------------------------------------- faq -- */
.faq { padding: 70px 0; border-bottom: 1px solid var(--grid); background: var(--surface); }
.faq h2 { font-size: clamp(26px, 3vw, 36px); }
.faq-list { margin-top: 30px; max-width: 780px; }
.faq-item { border-bottom: 1px solid var(--grid); }
.faq-item summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 18px; padding: 18px 4px; font-size: 16.5px; font-weight: 600; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-family: var(--mono); color: var(--accent-2); font-size: 18px; }
.faq-item[open] summary::after { content: '–'; }
.faq-item .a { padding: 0 4px 20px; color: var(--ink-2); font-size: 14.5px; max-width: 62em; }

/* ----------------------------------------------------------------- pilot -- */
.pilot { padding: 76px 0; }
.pilot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.pilot h2 { font-size: clamp(28px, 3.4vw, 40px); }
.pilot .lede { color: var(--ink-2); margin-top: 16px; font-size: 17px; }
.pilot ul { list-style: none; padding: 0; margin: 22px 0 0; }
.pilot ul li { padding: 8px 0 8px 26px; position: relative; color: var(--ink-2); font-size: 15px; border-bottom: 1px solid var(--grid); }
.pilot ul li::before { content: '✓'; position: absolute; left: 0; color: var(--accent-2); font-weight: 700; }
.lead-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px 30px; box-shadow: var(--shadow); }
.lead-card h3 { font-size: 21px; }
.lead-card .sub { font-size: 13.5px; color: var(--ink-3); margin: 6px 0 18px; }
.lead-card .field { margin-bottom: 14px; }
.hp { position: absolute; left: -5000px; opacity: 0; height: 1px; overflow: hidden; }
.form-msg { font-size: 13.5px; margin-top: 10px; min-height: 1.2em; }
.form-msg.err { color: var(--pole-neg); }
.form-ok { border: 1px solid color-mix(in srgb, var(--series-1) 45%, var(--surface)); background: color-mix(in srgb, var(--series-1) 8%, var(--surface)); border-radius: 10px; padding: 18px 20px; font-size: 14.5px; }
.form-ok p { color: var(--ink-2); margin-top: 6px; font-size: 13.5px; }

/* ---------------------------------------------------------------- footer -- */
.site-foot { border-top: 1px solid var(--grid); padding: 34px 0 44px; background: var(--surface); }
.site-foot .container { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.site-foot p { font-size: 12.5px; color: var(--ink-3); max-width: 62em; line-height: 1.6; }

/* ------------------------------------------------------------ responsive -- */
@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .specimen { transform: none; max-width: 560px; }
  .quotes { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { border-radius: 12px !important; margin: 0 0 12px; }
  .chart-grid { grid-template-columns: 1fr; }
  .theme-list { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .pilot-grid { grid-template-columns: 1fr; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .site-nav { display: none; }
  .hero { padding: 56px 0 48px; }
  .container { padding: 0 18px; }
  .field-row .field { min-width: 100%; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}