/* 3way.dev — "the attributed record".
   Every claim on this site carries a provenance stamp, in the same visual language the
   widget uses for message origins. A page about attribution attributes itself. */

:root {
  --paper:      #EAEDF0;
  --raised:     #F7F9FA;
  --ink:        #11151A;
  --ink-soft:   #4C565F;
  --rule:       #C9D0D7;
  /* The only two hues on the site. Both mean something. */
  --unverified: #5B3FD1;  /* an agent's claim about itself */
  --present:    #0B6E5F;  /* a human, actually here */

  --measure: 34rem;
  --gap: clamp(1rem, 2.5vw, 2rem);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  font-synthesis-weight: none;
}

/* Faint horizontal ruling, like security paper. Sits under everything, reads as texture. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom, transparent 0 43px, rgba(17,21,26,.035) 43px 44px);
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

h1, h2, h3 {
  font-family: 'Bricolage Grotesque', ui-sans-serif, system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2.3rem, 1.5rem + 2.6vw, 3.7rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 1.2rem + 2vw, 2.7rem); }
h3 { font-size: 1.18rem; letter-spacing: -0.012em; }

p { margin: 0 0 1.05em; max-width: var(--measure); }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:focus-visible, button:focus-visible {
  outline: 2.5px solid var(--unverified);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---- The stamp. The signature element. ------------------------------------ */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: .625rem;
  font-weight: 500;
  letter-spacing: .13em;
  text-transform: uppercase;
  padding: .28em .55em;
  border: 1px solid currentColor;
  border-radius: 2px;
  white-space: nowrap;
  vertical-align: 2px;
}
.stamp::before { content: ''; width: 5px; height: 5px; background: currentColor; border-radius: 50%; }
.stamp--measured { color: var(--present); }
.stamp--claimed   { color: var(--unverified); }
.stamp--weak      { color: var(--ink); border-style: dashed; }
.stamp--measured::before { border-radius: 50%; }
.stamp--claimed::before  { border-radius: 0; transform: rotate(45deg); }
.stamp--weak::before     { border-radius: 0; }

/* ---- Shell ---------------------------------------------------------------- */
.wrap { width: min(72rem, 100% - 2 * var(--gap)); margin-inline: auto; }

.masthead {
  display: flex; align-items: baseline; gap: 1.5rem; flex-wrap: wrap;
  padding: 1.4rem 0 1.2rem;
  border-bottom: 1px solid var(--rule);
}
.wordmark {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700; font-size: 1.22rem; letter-spacing: -.03em;
  text-decoration: none;
}
.wordmark span { color: var(--unverified); }
.masthead nav { margin-left: auto; display: flex; gap: 1.25rem; flex-wrap: wrap; }
.masthead nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: .74rem; letter-spacing: .07em; text-transform: uppercase;
  text-decoration: none; color: var(--ink-soft);
  padding-bottom: 2px; border-bottom: 1px solid transparent;
}
.masthead nav a:hover, .masthead nav a[aria-current] { color: var(--ink); border-bottom-color: var(--ink); }

section { padding: clamp(3.5rem, 7vw, 6.5rem) 0; border-bottom: 1px solid var(--rule); }
section:last-of-type { border-bottom: 0; }

/* An eyebrow that encodes the section's role in the argument, not decoration. */
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: .7rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0 0 1.1rem;
  display: flex; align-items: center; gap: .7rem;
}
.eyebrow::after { content: ''; flex: 1; height: 1px; background: var(--rule); }

.lede { font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); line-height: 1.5; color: var(--ink); max-width: 38rem; }
.two { display: grid; grid-template-columns: 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); }
@media (min-width: 62rem) { .two { grid-template-columns: 1.05fr .95fr; align-items: start; } }
/* The hero's left column carries a display headline and needs more room than a prose
   column does, or the type has to shrink to fit and stops being a hero. */
@media (min-width: 62rem) { .hero .two { grid-template-columns: 1.18fr .82fr; } }

/* ---- Hero: the thesis is the transcript ----------------------------------- */
.hero { padding-top: clamp(3rem, 6vw, 5rem); }
.hero h1 { margin-bottom: 1.4rem; }
.hero h1 em { font-style: normal; color: var(--unverified); }
.hero .lede { margin-bottom: 2rem; }

.cta-row { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; }
.btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
  text-decoration: none; padding: .8em 1.3em; border: 1.5px solid var(--ink);
  border-radius: 2px; background: var(--ink); color: var(--paper);
  transition: transform .12s ease, background .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }

/* ---- The transcript artifact ---------------------------------------------- */
.record {
  background: var(--raised);
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -28px rgba(17,21,26,.5);
  overflow: hidden;
}
.record__head {
  display: flex; align-items: center; gap: .6rem;
  padding: .7rem .9rem; border-bottom: 1px solid var(--rule);
  font-family: 'IBM Plex Mono', monospace; font-size: .68rem;
  letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft);
}
.record__head b { color: var(--ink); font-weight: 500; }
.record__body { padding: .9rem; display: flex; flex-direction: column; gap: .85rem; }

.line { opacity: 0; transform: translateY(6px); animation: line-in .45s ease forwards; }
@keyframes line-in { to { opacity: 1; transform: none; } }
.line__who {
  font-family: 'IBM Plex Mono', monospace;
  font-size: .625rem; letter-spacing: .13em; text-transform: uppercase;
  display: block; margin-bottom: .3rem;
}
.line__who i { font-style: normal; opacity: .55; }
.line__text {
  margin: 0; max-width: none; font-size: .93rem; line-height: 1.5;
  padding: .6rem .75rem; border-radius: 3px; border: 1px solid transparent;
}
.line--agent   .line__who  { color: var(--unverified); }
.line--agent   .line__text { background: rgba(91,63,209,.07); border-color: rgba(91,63,209,.18); }
.line--store   .line__who  { color: var(--ink-soft); }
.line--store   .line__text { background: #fff; border-color: var(--rule); }
.line--human   .line__who  { color: var(--present); }
.line--human   .line__text { background: rgba(11,110,95,.08); border-color: rgba(11,110,95,.22); }

/* The refusal. Deliberately not an error colour: in this design a refusal is a
   conversational move, not a failure. Ink, a rule, and a stamp. */
.refusal {
  border: 1px solid var(--ink);
  border-left-width: 4px;
  border-radius: 3px;
  padding: .75rem .85rem;
  background: #fff;
}
.refusal__tag {
  font-family: 'IBM Plex Mono', monospace; font-size: .625rem;
  letter-spacing: .13em; text-transform: uppercase; color: var(--ink-soft);
  display: block; margin-bottom: .35rem;
}
.refusal p { margin: 0; font-size: .93rem; max-width: none; }
.sensor {
  margin-top: .7rem; display: inline-flex; align-items: center; gap: .55rem;
  font-family: 'IBM Plex Mono', monospace; font-size: .72rem;
  letter-spacing: .06em; text-transform: uppercase;
  padding: .6em 1em; border: 1.5px solid var(--present); color: var(--present);
  border-radius: 2px; background: transparent;
}
.sensor::before {
  content: ''; width: 9px; height: 9px; border-radius: 50%;
  background: var(--present); animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .25; } }

/* ---- Claims list: every claim stamped ------------------------------------- */
.claims { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; }
.claims li {
  display: grid; gap: .25rem .9rem; padding: 1.15rem 0;
  border-top: 1px solid var(--rule);
  grid-template-columns: 1fr;
}
@media (min-width: 48rem) {
  .claims li { grid-template-columns: 8.5rem 1fr; align-items: baseline; }
}
/* A stamp hugs its text. As a grid item it would otherwise stretch to the column and
   stop reading as a stamp. */
.claims > li > .stamp { justify-self: start; }
.claims li:last-child { border-bottom: 1px solid var(--rule); }
.claims p { margin: 0; max-width: 42rem; }

.grid3 { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
@media (min-width: 50rem) { .grid3 { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }
.card h3 { margin-bottom: .45rem; }
.card p { font-size: .95rem; color: var(--ink-soft); margin: 0; }
.card__n {
  font-family: 'IBM Plex Mono', monospace; font-size: .68rem; letter-spacing: .12em;
  color: var(--unverified); display: block; margin-bottom: .6rem;
}

table { width: 100%; border-collapse: collapse; font-size: .93rem; margin: 1.2rem 0; }
th, td { text-align: left; padding: .7rem .8rem .7rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
th {
  font-family: 'IBM Plex Mono', monospace; font-size: .66rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500;
}
td b { font-weight: 600; }
code, .mono { font-family: 'IBM Plex Mono', monospace; font-size: .88em; }

.foot { padding: 3rem 0 4rem; color: var(--ink-soft); font-size: .87rem; }
.foot a { color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .line { opacity: 1; transform: none; }
}