:root {
  color-scheme: light dark;
  --paper: #f7f3e8;
  --surface: #fffdf7;
  --ink: #18211b;
  --muted: #526057;
  --line: #c8c4b8;
  --accent: #7b2d1e;
  --accent-ink: #ffffff;
  --banner: #34251f;
  --banner-ink: #ffffff;
  --focus: #005fcc;
  --success: #27633a;
  --warning: #8a4b00;
  --danger: #a12222;
  --content: 48rem;
}

* { box-sizing: border-box; }
html { font-size: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.55;
}

button, input, textarea { font: inherit; }
button, input, textarea, audio { max-width: 100%; }
button { min-height: 44px; }
button:not(:disabled) { cursor: pointer; }

:focus-visible {
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.skip-link {
  background: var(--surface);
  color: var(--ink);
  left: 1rem;
  padding: 0.75rem 1rem;
  position: absolute;
  top: -8rem;
  z-index: 10;
}
.skip-link:focus { top: 1rem; }

.site-header, main, footer {
  margin-inline: auto;
  max-width: var(--content);
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}
.site-header {
  align-items: end;
  display: flex;
  gap: 1.25rem;
  justify-content: space-between;
  padding-block: 1.25rem 0.75rem;
}
h1, h2, legend {
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  line-height: 1.12;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 10vw, 3.5rem); letter-spacing: -0.035em; margin: 0; }
h2 { font-size: clamp(1.75rem, 7vw, 2.5rem); margin: 0 0 0.75rem; }
p { max-width: 65ch; }
.eyebrow, .step {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  margin: 0 0 0.3rem;
  text-transform: uppercase;
}
.business-name { color: var(--muted); margin: 0.25rem 0 0; }

nav { display: flex; gap: 0.35rem; }
.nav-button {
  background: transparent;
  border: 0;
  border-bottom: 0.2rem solid transparent;
  color: var(--ink);
  font-weight: 750;
  padding: 0.7rem;
}
.nav-button[aria-current="page"] { border-color: var(--accent); color: var(--accent); }
.count {
  background: var(--accent);
  border-radius: 100%;
  color: var(--accent-ink);
  display: inline-grid;
  font-size: 0.75rem;
  min-height: 1.4rem;
  min-width: 1.4rem;
  place-items: center;
}

main { min-height: 70vh; padding-block: clamp(1.5rem, 6vw, 3rem); }
.screen[hidden], [hidden] { display: none !important; }
.session-card {
  background: var(--surface);
  border-top: 0.3rem solid var(--accent);
  margin-inline: auto;
  max-width: 32rem;
  padding: clamp(1.25rem, 6vw, 2.5rem);
}
.session-card form { display: grid; gap: 0.75rem; margin-top: 1.5rem; }

label, legend { font-weight: 800; }
input, textarea {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  color: var(--ink);
  min-height: 48px;
  padding: 0.75rem;
  width: 100%;
}
textarea { resize: vertical; }
fieldset {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
  padding: 1.5rem 0 0;
}
legend { font-size: 1.35rem; padding: 0 0.5rem 0 0; }

.capture-form { display: grid; gap: 1.75rem; }
.capture-button {
  align-items: center;
  background: var(--banner);
  border-radius: 0.35rem;
  color: var(--banner-ink);
  display: flex;
  font-size: clamp(1.15rem, 5vw, 1.55rem);
  gap: 0.6rem;
  justify-content: center;
  margin-top: 0.75rem;
  min-height: 7.5rem;
  padding: 1.25rem;
  text-align: center;
}
.capture-button span { font-size: 2.4rem; line-height: 1; }
.capture-button:focus-within { outline: 0.2rem solid var(--focus); outline-offset: 0.2rem; }
.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}
.field { display: grid; gap: 0.4rem; }
.field-help { color: var(--muted); font-size: 0.9rem; margin: 0.5rem 0 0; }
.media-list { display: grid; gap: 0.5rem; list-style: none; margin: 1rem 0 0; padding: 0; }
.media-list li {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  padding: 0.65rem;
}
.media-name { min-width: 0; overflow-wrap: anywhere; }
.voice-controls, .receipt-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.recording-state { color: var(--muted); font-variant-numeric: tabular-nums; }
.recording-state.is-recording { color: var(--danger); font-weight: 800; }

.primary-button, .secondary-button, .text-button {
  border-radius: 0.25rem;
  font-weight: 800;
  padding: 0.75rem 1rem;
}
.primary-button { background: var(--accent); border: 2px solid var(--accent); color: var(--accent-ink); }
.secondary-button { background: var(--surface); border: 2px solid var(--accent); color: var(--accent); }
.text-button { background: transparent; border: 0; color: var(--accent); text-decoration: underline; text-underline-offset: 0.2em; }
.save-button { font-size: 1.25rem; min-height: 4.25rem; width: 100%; }
button:disabled { cursor: wait; opacity: 0.6; }

.section-heading { display: grid; gap: 0.75rem; margin-bottom: 1.75rem; }
.section-heading > p { color: var(--muted); margin: 0; }
.notice, .empty-state {
  background: var(--surface);
  border-left: 0.3rem solid var(--accent);
  margin: 0 0 1.5rem;
  padding: 0.9rem 1rem;
}
.notice[data-tone="success"] { border-color: var(--success); }
.notice[data-tone="warning"] { border-color: var(--warning); }
.field-error { color: var(--danger); font-weight: 700; margin: 0; }

.receipt-list { display: grid; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.receipt-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 0.25rem solid var(--line);
  padding: 1rem;
}
.receipt-card header { align-items: start; display: flex; gap: 0.75rem; justify-content: space-between; }
.receipt-card h3 { font-size: 1.1rem; margin: 0; overflow-wrap: anywhere; }
.receipt-card p { margin: 0.45rem 0; }
.receipt-meta { color: var(--muted); font-size: 0.88rem; }
.status-chip {
  border: 1px solid currentColor;
  border-radius: 999px;
  flex: 0 0 auto;
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.55rem;
  text-transform: uppercase;
}
.status-uploaded { color: var(--success); }
.status-failed, .status-conflict { color: var(--danger); }
.status-uploading { color: var(--warning); }
.hash-list { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.75rem; overflow-wrap: anywhere; padding-left: 1.2rem; }

.review-workspace { display: grid; gap: 1rem; }
.proposal-list {
  display: grid;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.proposal-list-button {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  gap: 0.2rem;
  min-height: 60px;
  padding: 0.75rem;
  text-align: left;
  width: 100%;
}
.proposal-list-button[aria-current="true"] {
  border-color: var(--accent);
  box-shadow: inset 0.25rem 0 0 var(--accent);
}
.proposal-list-button span {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: capitalize;
}
.proposal-detail {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 0.3rem solid var(--accent);
  min-width: 0;
  padding: clamp(1rem, 4vw, 1.5rem);
}
.proposal-detail > header {
  align-items: start;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
}
.proposal-detail h3 { font-size: 1.45rem; margin: 0; overflow-wrap: anywhere; }
.proposal-version { color: var(--muted); margin: 0.35rem 0 0; }
.proposal-digest {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.72rem;
  overflow-wrap: anywhere;
}
.proposal-status { text-align: center; }
.status-awaiting_approval { color: var(--warning); }
.status-approved { color: var(--success); }
.status-rejected, .status-superseded { color: var(--muted); }
.proposal-fields { border-top: 1px solid var(--line); margin: 1.25rem 0; }
.proposal-fields > div {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 0.35rem;
  padding: 0.75rem 0;
}
.proposal-fields dt { font-weight: 800; }
.proposal-fields dd {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: space-between;
  margin: 0;
  min-width: 0;
}
.field-value { overflow-wrap: anywhere; }
.epistemic-chip { text-transform: lowercase; }
.epistemic-observed, .epistemic-confirmed { color: var(--success); }
.epistemic-inferred { color: var(--warning); }
.epistemic-conflicting { color: var(--danger); }
.epistemic-unknown { color: var(--muted); }
.review-questions { border-top: 1px solid var(--line); padding-top: 1.25rem; }
.review-questions h4 { font-size: 1.15rem; margin: 0 0 1rem; }
.review-complete { color: var(--success); font-weight: 700; }
.answer-form { display: grid; gap: 1.25rem; }
.review-actions {
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
}
.danger-button { border-color: var(--danger); color: var(--danger); }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; padding-block: 1.5rem 2.5rem; }

@media (min-width: 40rem) {
  .section-heading { align-items: end; grid-template-columns: 1fr 1fr; }
  .receipts-heading { grid-template-columns: 1fr auto; }
  .review-workspace { align-items: start; grid-template-columns: minmax(12rem, 0.72fr) minmax(0, 2fr); }
  .proposal-list { position: sticky; top: 1rem; }
  .proposal-fields > div { align-items: center; grid-template-columns: minmax(8rem, 0.65fr) minmax(0, 1.35fr); }
}

@media (max-width: 31rem) {
  .site-header { align-items: stretch; flex-direction: column; }
  nav { justify-content: space-between; }
  .nav-button { flex: 1; padding-inline: 0.4rem; }
}

@media (prefers-reduced-motion: no-preference) {
  button, .capture-button { transition: transform 120ms ease, opacity 120ms ease; }
  button:not(:disabled):active, .capture-button:active { transform: translateY(1px); }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141814;
    --surface: #202620;
    --ink: #f4f1e7;
    --muted: #b8c3ba;
    --line: #4a554c;
    --accent: #ffb5a3;
    --accent-ink: #25100b;
    --banner: #f2c7a5;
    --banner-ink: #24130e;
    --focus: #ffd166;
    --success: #8fd49e;
    --warning: #ffd08a;
    --danger: #ffaaa1;
  }
}