/* ── Tokens ───────────────────────────────────────────── */
:root {
  --ink:        #141414;
  --ink-soft:   #4a4a4a;
  --ink-faint:  #8a8a8a;
  --paper:      #FBFBF9;
  --backdrop:   #D8D8D4;
  --rule:       #141414;
  --rule-faint: #BDBDB8;
  --glow:       none;
  --sheet-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 14px 34px rgba(0,0,0,0.16);
  --scan-op:    0;
}

:root[data-mode="crt"] {
  --ink:        #EDEDEA;
  --ink-soft:   #A8A8A4;
  --ink-faint:  #6E6E6A;
  --paper:      #0C0C0C;
  --backdrop:   #000000;
  --rule:       #EDEDEA;
  --rule-faint: #3A3A38;
  --glow:       0 0 12px rgba(255, 255, 255, 0.18);
  --sheet-shadow: 0 0 0 1px #262624;
  --scan-op:    0.5;
}

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: clamp(1rem, 4vw, 3.5rem) 0;
  background: var(--backdrop);
  color: var(--ink);
  font-family: "IBM Plex Mono", ui-monospace, "Courier New", monospace;
  font-size: 0.94rem;
  line-height: 1.68;
  font-variant-ligatures: none;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s, color 0.25s;
}

/* CRT scanlines + vignette */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  opacity: var(--scan-op);
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.26) 0 1px,
      rgba(0, 0, 0, 0) 1px 3px
    ),
    radial-gradient(ellipse at center, rgba(0,0,0,0) 55%, rgba(0,0,0,0.55) 100%);
  transition: opacity 0.25s;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

/* ── The slip ─────────────────────────────────────────── */
.receipt {
  width: min(860px, 94vw);
  margin: 0 auto;
  background: var(--paper);
  box-shadow: var(--sheet-shadow);
  padding: 0 clamp(1.2rem, 4vw, 3rem);
  transition: background-color 0.25s, box-shadow 0.25s;
}

.tear {
  height: 10px;
  background: var(--paper);
  margin: 0 clamp(-1.2rem, -4vw, -3rem);
  transition: background-color 0.25s;
}

.tear-top {
  -webkit-mask: repeating-conic-gradient(from -45deg at bottom, #0000 0deg 90deg, #000 90deg 180deg) 0 0 / 16px 100%;
          mask: repeating-conic-gradient(from -45deg at bottom, #0000 0deg 90deg, #000 90deg 180deg) 0 0 / 16px 100%;
}

.tear-bottom {
  -webkit-mask: repeating-conic-gradient(from 135deg at top, #0000 0deg 90deg, #000 90deg 180deg) 0 0 / 16px 100%;
          mask: repeating-conic-gradient(from 135deg at top, #0000 0deg 90deg, #000 90deg 180deg) 0 0 / 16px 100%;
}

/* ── Rules ────────────────────────────────────────────── */
.rule {
  border-top: 1px dashed var(--rule-faint);
  margin: 1.1rem 0;
}

.rule-dash {
  border-top-style: dotted;
  border-top-color: var(--rule-faint);
}

.rule-double {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  height: 3px;
  margin: 1.2rem 0;
}

/* ── Head ─────────────────────────────────────────────── */
.slip-head {
  padding-top: 1.6rem;
  text-align: center;
}


h1 {
  margin: 0;
  font-size: clamp(1.05rem, 3.4vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-wrap: balance;
  text-shadow: var(--glow);
}

.sub {
  margin: 0.3rem 0 0;
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ── Meta rows ────────────────────────────────────────── */
.meta {
  margin: 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  font-size: 0.82rem;
}

.meta > div {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.meta dt {
  flex: 0 0 4.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

.meta dd {
  margin: 0;
  color: var(--ink);
}

.meta dd a {
  text-decoration: none;
  border-bottom: 1px dotted var(--rule-faint);
}

.meta dd a:hover {
  border-bottom-style: solid;
  border-bottom-color: var(--ink);
}

/* ── Command nav ──────────────────────────────────────── */
.cmd-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 1.4rem;
  padding-bottom: 0.3rem;
}

.cmd-nav a {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  padding: 0.1rem 0.2rem;
  transition: background-color 0.12s, color 0.12s;
}

.cmd-nav a:hover,
.cmd-nav a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.prompt { color: var(--ink-faint); }

.cmd-nav a:hover .prompt,
.cmd-nav a:focus-visible .prompt { color: var(--paper); }

/* ── Portrait ─────────────────────────────────────────── */
.portrait {
  margin: 1.6rem 0 0;
  text-align: center;
}

.portrait img {
  width: 164px;
  height: 164px;
  margin: 0 auto;
  object-fit: cover;
  object-position: top center;
  border: 1px solid var(--rule);
  filter: grayscale(1);
}

.portrait figcaption {
  margin-top: 0.5rem;
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
}

/* ── Blocks ───────────────────────────────────────────── */
.block { padding: 2.2rem 0 0; }

h2 {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-align: center;
  text-shadow: var(--glow);
}

.bracket { color: var(--ink-faint); }

.block p {
  margin: 0 0 0.8rem;
  color: var(--ink-soft);
  text-align: justify;
  hyphens: auto;
}

.block p:last-child { margin-bottom: 0; }

.block strong {
  color: var(--ink);
  font-weight: 500;
  background: linear-gradient(to top, var(--rule-faint) 0 2px, transparent 2px);
}

.block p a {
  text-decoration: none;
  border-bottom: 1px dotted var(--rule-faint);
  color: var(--ink);
}

.block p a:hover { border-bottom-style: solid; border-bottom-color: var(--ink); }

.aside {
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-align: center !important;
  color: var(--ink-faint) !important;
}

/* ── Line items ───────────────────────────────────────── */
.items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.item + .item {
  margin-top: 1.4rem;
  padding-top: 1.4rem;
  border-top: 1px dotted var(--rule-faint);
}

.item-head {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0 0.5rem;
  margin-bottom: 0.5rem;
}

.qty {
  grid-row: span 2;
  font-size: 0.78rem;
  color: var(--ink-faint);
  padding-top: 0.12rem;
}

h3 {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  text-wrap: balance;
}

.tag {
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
}

.item p { font-size: 0.86rem; }

.grant {
  font-size: 0.74rem !important;
  letter-spacing: 0.02em;
  color: var(--ink-faint) !important;
  text-align: left !important;
  border-left: 2px solid var(--rule-faint);
  padding-left: 0.7rem;
}

.grant em { font-style: italic; }

/* ── Papers (price rows) ──────────────────────────────── */
.papers {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.papers a {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: 0.76rem;
  text-decoration: none;
  color: var(--ink-soft);
}

.papers a::before {
  content: "›";
  flex: 0 0 auto;
  color: var(--ink-faint);
}

.paper-title { flex: 0 1 auto; }

.leader {
  flex: 1 1 1.5rem;
  min-width: 1.2rem;
  border-bottom: 1px dotted var(--rule-faint);
  transform: translateY(-0.22em);
}

.venue {
  flex: 0 0 auto;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}

.papers a:hover { color: var(--ink); }
.papers a:hover .venue,
.papers a:hover::before { color: var(--ink); }
.papers a:hover .leader { border-bottom-color: var(--ink-soft); }

/* ── Totals ───────────────────────────────────────────── */
.totals {
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.totals > div {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.totals .leader { flex: 1 1 auto; }

.totals .grand {
  font-weight: 600;
  color: var(--ink);
}

/* ── Foot ─────────────────────────────────────────────── */
.slip-foot {
  padding: 2.2rem 0 1.8rem;
  text-align: center;
}

.thanks {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
}

.stamp {
  margin: 0.8rem 0 0;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  line-height: 1.9;
  color: var(--ink-faint);
}

.barcode {
  height: 46px;
  margin: 1.2rem auto 0.4rem;
  width: min(260px, 70%);
  background-image: repeating-linear-gradient(
    to right,
    var(--ink) 0 2px, transparent 2px 5px,
    var(--ink) 5px 6px, transparent 6px 8px,
    var(--ink) 8px 11px, transparent 11px 12px,
    var(--ink) 12px 13px, transparent 13px 16px,
    var(--ink) 16px 18px, transparent 18px 21px,
    var(--ink) 21px 22px, transparent 22px 25px
  );
}

.barcode-num {
  margin: 0;
  font-size: 0.64rem;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
}

.caret-line {
  margin: 1.6rem 0 0;
  font-size: 0.86rem;
  text-align: left;
}

.caret {
  display: inline-block;
  width: 0.56em;
  height: 1.05em;
  vertical-align: text-bottom;
  background: var(--ink);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* ── Mode toggle ──────────────────────────────────────── */
.mode-toggle {
  position: fixed;
  top: 0.9rem;
  right: 0.9rem;
  z-index: 1000;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
  font-family: inherit;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  padding: 0.5rem 0.7rem;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.mode-toggle:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 560px) {
  .meta > div { flex-direction: column; gap: 0; }
  .meta dt { flex: none; }
  .papers a { flex-wrap: wrap; }
  .papers .leader { display: none; }
  .venue { margin-left: auto; }
  .block p { text-align: left; }
  .item-head { grid-template-columns: 1.8rem 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .caret { animation: none; }
}

@media print {
  :root { --scan-op: 0; }
  body { background: #fff; padding: 0; }
  .receipt { box-shadow: none; width: 100%; }
  .mode-toggle { display: none; }
}