/* humanor — the entire visual language.
   Two voices, and the page is the argument between them:
   the SERIF is the human hand, the MONO is the machine.
   Nothing else is allowed in. No accent colour. Ever.

   FONTS — before launch, self-host to keep the site third-party-free
   (the manifesto promises no tracking; Google Fonts sends visitor IPs).
   Drop InstrumentSerif-Regular.woff2 + IBMPlexMono-Regular.woff2 in /fonts,
   uncomment the @font-face rules below, and delete the <link> in the HTML. */

/*
@font-face { font-family:"Instrument Serif"; src:url(/fonts/InstrumentSerif-Regular.woff2) format("woff2"); font-display:swap; }
@font-face { font-family:"IBM Plex Mono";   src:url(/fonts/IBMPlexMono-Regular.woff2)   format("woff2"); font-display:swap; }
*/

:root {
  --bg:        #050505;
  --ink:       #F4F1EA;
  --ink-dim:   rgba(244, 241, 234, 0.46);
  --ink-faint: rgba(244, 241, 234, 0.20);
  --ink-ghost: rgba(244, 241, 234, 0.09);

  --serif: "Instrument Serif", Georgia, "Iowan Old Style", Times, serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --breath: clamp(1.6rem, 7vh, 5rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* The light behind the words — the only "effect" on the whole site.
   Same radial breath as the profile mark, so the two feel cut from one block. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 70% 55% at 50% 42%,
              rgba(244, 241, 234, 0.055), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Film grain: the page should feel printed, not exported. */
body::after {
  content: "";
  position: fixed;
  inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
  opacity: 0.035;
  pointer-events: none;
  z-index: 1;
}

main {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--breath) 1.5rem;
  text-align: center;
}

/* Optical centring: the eye reads centre as slightly high. */
main > * + * { margin-top: var(--breath); }
#receipt { margin-top: 1.4rem; }
#seal    { margin-top: 2.1rem; }
main { padding-bottom: calc(var(--breath) * 1.9); }

/* ---------------------------------------------------------------- round no. */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-indent: 0.42em;
}

/* -------------------------------------------------------------- the phrase */

.line {
  font-size: clamp(1.85rem, 5.6vw, 3.9rem);
  line-height: 1.28;
  font-weight: 400;
  max-width: 19ch;
  letter-spacing: -0.005em;
  text-wrap: balance;
}

/* --------------------------------------------------------------- the vote */

.vote {
  display: flex;
  align-items: center;
  gap: clamp(1.6rem, 7vw, 3.4rem);
}

/* The two answers are set in the two voices. You can read the choice
   in the letterforms before you read the words. */
.choice {
  background: none;
  border: 0;
  padding: 0.5rem 0.2rem;
  color: var(--ink-dim);
  cursor: pointer;
  transition: color 0.5s ease, opacity 0.5s ease;
  position: relative;
}

.choice--human {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 3.4vw, 1.7rem);
  letter-spacing: 0.14em;
}

.choice--ai {
  font-family: var(--mono);
  font-size: clamp(0.95rem, 2.9vw, 1.4rem);
  letter-spacing: 0.22em;
}

.choice::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transition: transform 0.45s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.choice:hover, .choice:focus-visible { color: var(--ink); outline: none; }
.choice:hover::after, .choice:focus-visible::after { transform: scaleX(1); }

/* The rule between them — the same rule as the profile mark. */
.divider {
  width: 1px;
  height: 2.1em;
  background: var(--ink-ghost);
}

/* voted state */
.vote.done .choice { cursor: default; }
.vote.done .choice[aria-pressed="false"] { opacity: 0.14; }
.vote.done .choice[aria-pressed="true"]  { color: var(--ink); }
.vote.done .choice::after { transform: scaleX(0); }

/* ------------------------------------------------------------- after vote */

.receipt {
  animation: rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  font-family: var(--mono);
  font-size: 0.74rem;
  line-height: 2;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}
.receipt b { color: var(--ink); font-weight: 400; }

/* ---------------------------------------------------------------- the seal */

.seal {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  color: var(--ink-ghost);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.9;
  transition: color 0.5s ease;
}
.seal:hover, .seal:focus-visible { color: var(--ink-dim); outline: none; }

/* ----------------------------------------------------------------- footer */

footer {
  position: relative;
  z-index: 2;
  padding: 1.6rem 1.5rem 2.2rem;
  display: flex;
  justify-content: center;
  gap: 1.6rem;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
footer a {
  color: var(--ink-ghost);
  text-decoration: none;
  transition: color 0.5s ease;
}
footer a:hover, footer a:focus-visible { color: var(--ink-dim); outline: none; }

/* ------------------------------------------------- inner pages (proof etc.) */

.page {
  align-items: flex-start;
  text-align: left;
  justify-content: flex-start;
  max-width: 46rem;
  margin: 0 auto;
  width: 100%;
  gap: 2.4rem;
  padding-top: clamp(3rem, 12vh, 7rem);
}

.page h1 {
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  font-weight: 400;
  letter-spacing: -0.01em;
}

.page p {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 2.1;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
  max-width: 58ch;
}
.page p b { color: var(--ink); font-weight: 400; }

.page section { width: 100%; }

.label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1rem;
  display: block;
}

pre {
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 2;
  color: var(--ink);
  background: rgba(244, 241, 234, 0.028);
  padding: 1.2rem 1.3rem;
  overflow-x: auto;
  white-space: pre;
}

/* archive + proof rows */
.row {
  display: flex;
  gap: 1.2rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-top: 1px solid var(--ink-ghost);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
}
.row:last-child { border-bottom: 1px solid var(--ink-ghost); }
.row .no { color: var(--ink-faint); flex: 0 0 3.2rem; }
.row .txt { font-family: var(--serif); font-size: 1.05rem; letter-spacing: 0; color: var(--ink); flex: 1; }
.row .verdict { flex: 0 0 auto; color: var(--ink-faint); }
.row .verdict[data-label="HUMAN"] { font-family: var(--serif); font-size: 0.95rem; letter-spacing: 0.1em; }
.row .verdict[data-label="AI"]    { font-family: var(--mono);  letter-spacing: 0.18em; }

/* --------------------------------------------------------------- page load */

.rise { opacity: 0; transform: translateY(0.7rem); animation: rise 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.rise-1 { animation-delay: 0.15s; }
.rise-2 { animation-delay: 0.75s; }
.rise-3 { animation-delay: 1.35s; }
.rise-4 { animation-delay: 1.8s; }

@keyframes rise { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .rise { animation: none; opacity: 1; transform: none; }
  * { transition-duration: 0.01ms !important; }
}

@media (max-width: 30rem) {
  .row { flex-wrap: wrap; }
  .row .txt { flex: 1 1 100%; order: 2; }
  .row .verdict { order: 1; margin-left: auto; }
}

/* proof — the check row reads as one instrument, not four parts */
.check-row { display: flex; flex-wrap: wrap; gap: .7rem; align-items: stretch; }
.check-row input { flex: 0 0 auto; }
.check-row input#i-salt { flex: 1 1 12rem; min-width: 0; }
.check-row button { padding: .6rem 1.1rem; }