/* SPEC-002 §1.2 — mobile-first, AA contrast, no framework, no blocking third-party assets. */

:root {
  --ink: #1a1a1a;
  --ink-muted: #4a4a4a;
  --paper: #ffffff;
  --paper-tint: #f4f2ee;
  --line: #d8d3ca;
  --accent: #1554b3; /* AA on white and on --paper-tint */
  --warning-bg: #fff4d6;
  --warning-border: #9a6a00;
  --focus: #1554b3;
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

a { color: var(--accent); }

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

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

.site-header, .site-footer {
  padding: 0.75rem 1rem;
}

.site-header .brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

.tool h1 {
  font-size: 1.5rem;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.lede {
  color: var(--ink-muted);
  margin-top: 0;
}

.inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
}

.field label {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.field input, .field select {
  font-size: 1rem;
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
}

.hint {
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin: 0.25rem 0 0;
}

.noscript-note {
  font-size: 0.875rem;
  color: var(--ink-muted);
  border-left: 3px solid var(--line);
  padding-left: 0.75rem;
}

.result {
  background: var(--paper-tint);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
}

.result-headline {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.result-breakdown {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.result-breakdown th, .result-breakdown td {
  text-align: left;
  padding: 0.25rem 0.5rem 0.25rem 0;
  vertical-align: top;
}

.result-breakdown th { font-weight: 500; color: var(--ink-muted); width: 8rem; }
.result-breakdown td:nth-child(2) { font-weight: 700; width: 4.5rem; }
.result-breakdown .detail { color: var(--ink-muted); font-size: 0.8125rem; }

.warnings { margin: 0.75rem 0; }

.warning {
  background: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  color: #4a3800;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  font-size: 0.9375rem;
  margin: 0 0 0.5rem;
}

.warning[hidden] { display: none; }

.provenance {
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.email-capture {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  margin-top: 1rem;
}

.email-capture label { font-weight: 600; display: block; margin-bottom: 0.25rem; }

.email-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.email-row input {
  flex: 1 1 12rem;
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 1rem;
}

button {
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:hover { filter: brightness(1.1); }

.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-weight: 400;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  color: var(--ink-muted);
}

.consent-row input { margin-top: 0.2rem; }

.privacy-note { font-size: 0.75rem; color: var(--ink-muted); }

.permalink-row button {
  background: transparent;
  color: var(--accent);
}

#how-it-works, #comparison, #faq {
  margin-top: 2.5rem;
}

h2 { font-size: 1.25rem; }

.table-scroll { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

#comparison th, #comparison td {
  border-bottom: 1px solid var(--line);
  padding: 0.5rem;
  text-align: left;
}

.table-note {
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.faq-item { margin-bottom: 1rem; }
.faq-item dt { font-weight: 600; margin-bottom: 0.25rem; }
.faq-item dd { margin: 0; color: var(--ink-muted); }

@media (min-width: 480px) {
  .inputs { grid-template-columns: 1fr 1fr 1fr; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f0ede6;
    --ink-muted: #b8b2a5;
    --paper: #14130f;
    --paper-tint: #1e1c17;
    --line: #3a362c;
    --accent: #7aa7ff;
    --warning-bg: #3a2e0a;
    --warning-border: #d9a441;
  }
  .warning { color: #f5dfa0; }
  button { color: #0c0c0c; }
}