/* ============================================================
   Article figures — hand-rolled HTML/CSS diagrams (no Mermaid).
   Tuned to blend into the page: the site's surface tint
   (--md-code-bg-color) for fills, light borders, no drop shadows,
   colour used only as restrained accents. Adapts to light/dark
   via Material variables. Used in the Vibe Coding articles.
   ============================================================ */

/* ---------- Model + Harness = Agent ---------- */
.md-typeset .eqn {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 0.6rem;
  margin: 1.8rem 0;
}
.md-typeset .eqn__chip {
  flex: 1 1 0;
  min-width: 160px;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem 1.1rem;
  border-radius: 0.7rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
}
.md-typeset .eqn__chip b { font-size: 19px; font-weight: 700; }
.md-typeset .eqn__chip small {
  margin-top: 0.3rem;
  font-size: 19px;
  line-height: 1.45;
  color: var(--md-default-fg-color--light);
}
.md-typeset .eqn__chip--model { border-top: 3px solid var(--md-default-fg-color--lightest); }
.md-typeset .eqn__chip--harness { border-top: 3px solid var(--md-default-fg-color--light); }
.md-typeset .eqn__chip--agent {
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid var(--md-default-fg-color--light);
}
.md-typeset .eqn__chip--agent b { font-size: 19px; }
.md-typeset .eqn__op {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--md-default-fg-color--light);
}

/* ---------- two halves: taste × framework ---------- */
.md-typeset .duo {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 0.6rem;
  margin: 1.8rem 0;
}
.md-typeset .duo__card {
  flex: 1 1 0;
  min-width: 200px;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  padding: 1rem 1.1rem;
  border-radius: 0.7rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
}
.md-typeset .duo__label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--md-default-fg-color--light);
}
.md-typeset .duo__sub {
  margin-top: 0.25rem;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--md-default-fg-color);
}
.md-typeset .duo__items {
  margin-top: 0.45rem;
  font-size: 15px;
  line-height: 1.55;
  color: var(--md-default-fg-color--light);
}
.md-typeset .duo__op {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--md-default-fg-color--light);
}

/* ---------- ultracode dynamic pipeline (left-to-right) ---------- */
.md-typeset .pipe {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin: 1.9rem 0 0.5rem;
}
.md-typeset .pipe__stage {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  max-width: 165px;
  padding: 0.55rem 0.75rem;
  border-radius: 0.6rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.3;
}
.md-typeset .pipe__stage small {
  display: block;
  margin-top: 0.2rem;
  font-weight: 400;
  font-size: 12px;
  line-height: 1.35;
  color: var(--md-default-fg-color--light);
}
.md-typeset .pipe__stage--io { border-color: var(--md-default-fg-color--light); }
.md-typeset .pipe__stage--verify { border-color: #d99000; }
.md-typeset .pipe__stage--done {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.4);
}
.md-typeset .pipe__arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--md-default-fg-color--light);
  font-size: 1.05rem;
  line-height: 1;
}
.md-typeset .pipe__arrow em {
  font-style: normal;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin-bottom: 2px;
  white-space: nowrap;
}
.md-typeset .pipe__fan {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.45rem;
  border: 1px dashed var(--md-default-fg-color--lightest);
  border-radius: 0.6rem;
  background: transparent;
}
.md-typeset .pipe__node {
  padding: 0.3rem 0.7rem;
  border-radius: 0.45rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}
.md-typeset .pipe__node--more { font-weight: 400; font-style: italic; opacity: 0.75; border-style: dashed; }
.md-typeset .pipe__caption {
  width: 100%;
  font-size: 13px;
  color: var(--md-default-fg-color--light);
  text-align: center;
  margin-top: 0.35rem;
}

/* ---------- concentric rings: prompt ⊂ context ⊂ harness ---------- */
.md-typeset .rings {
  position: relative;
  width: 100%;
  height: 374px;
  margin: 2rem 0 1.5rem;
}
.md-typeset .ring {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  box-sizing: border-box;
}
.md-typeset .ring__label {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-weight: 700;
  line-height: 1;
}
.md-typeset .ring--outer {
  width: 364px;
  height: 364px;
  background: rgba(127, 127, 127, 0.05);
  border: 1.5px solid var(--md-default-fg-color--lightest);
}
.md-typeset .ring--outer .ring__label { top: 16px; color: var(--md-default-fg-color--light); font-size: 0.9rem; }
.md-typeset .ring--mid {
  width: 252px;
  height: 252px;
  background: rgba(127, 127, 127, 0.07);
  border: 1.5px solid var(--md-default-fg-color--light);
}
.md-typeset .ring--mid .ring__label { top: 15px; color: var(--md-default-fg-color--light); font-size: 0.82rem; }
.md-typeset .ring--inner {
  width: 146px;
  height: 146px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-code-bg-color);
  border: 1.5px solid var(--md-default-fg-color);
}
.md-typeset .ring--inner .ring__label {
  position: static;
  transform: none;
  white-space: normal;
  text-align: center;
  color: var(--md-default-fg-color);
  font-size: 0.78rem;
  padding: 0 12px;
}
@media screen and (max-width: 30em) {
  .md-typeset .rings { height: 312px; }
  .md-typeset .ring--outer { width: 300px; height: 300px; }
  .md-typeset .ring--mid { width: 208px; height: 208px; }
  .md-typeset .ring--inner { width: 122px; height: 122px; }
}

/* ---------- the agent loop ---------- */
.md-typeset .loop { margin: 1.9rem 0; }
.md-typeset .loop__row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}
.md-typeset .loop__io {
  padding: 0.5rem 0.9rem;
  border-radius: 0.6rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--md-default-fg-color);
}
.md-typeset .loop__io--task { border-color: var(--md-default-fg-color--light); }
.md-typeset .loop__io--done {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.4);
}
.md-typeset .loop__box {
  max-width: 100%;
  border: 1px dashed var(--md-default-fg-color--lightest);
  border-radius: 0.85rem;
  padding: 0.85rem 0.95rem 0.7rem;
  background: transparent;
}
.md-typeset .loop__box-label {
  display: block;
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.6rem;
}
.md-typeset .loop__nodes {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 0.4rem;
}
.md-typeset .loop__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-width: 98px;
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
  font-size: 0.8rem;
  font-weight: 600;
}
.md-typeset .loop__node small {
  font-weight: 400;
  font-size: 0.67rem;
  color: var(--md-default-fg-color--light);
  margin-top: 0.15rem;
}
.md-typeset .loop__node--model { border-color: var(--md-default-fg-color--light); }
.md-typeset .loop__node--check { border-color: #d99000; }
.md-typeset .loop__arrow {
  display: flex;
  align-items: center;
  color: var(--md-default-fg-color--light);
  font-size: 1rem;
}
.md-typeset .loop__back,
.md-typeset .loop__branch {
  margin-top: 0.6rem;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--md-default-fg-color--light);
}
.md-typeset .loop__back b { color: #d99000; }
.md-typeset .loop__branch { text-align: center; }
.md-typeset .loop__branch b { color: var(--md-default-fg-color); }

/* ---------- long-horizon timeline ---------- */
.md-typeset .timeline { margin: 1.9rem 0; }
.md-typeset .timeline__axis {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  text-align: center;
  margin-bottom: 0.7rem;
}
.md-typeset .timeline__row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem 0.95rem;
  border-radius: 0.7rem;
  margin-bottom: 0.6rem;
  background: var(--md-code-bg-color);
}
.md-typeset .timeline__row--bad { border-left: 3px solid rgba(239, 68, 68, 0.6); }
.md-typeset .timeline__row--good { border-left: 3px solid rgba(34, 197, 94, 0.6); }
.md-typeset .timeline__tag {
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--md-default-fg-color--light);
}
.md-typeset .timeline__steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
}
.md-typeset .step {
  padding: 0.25rem 0.55rem;
  border-radius: 0.4rem;
  font-size: 0.74rem;
  font-weight: 600;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
}
.md-typeset .step--ghost { opacity: 0.6; font-style: italic; }
.md-typeset .seq-arrow { color: var(--md-default-fg-color--light); font-size: 0.8rem; }
.md-typeset .outcome {
  padding: 0.25rem 0.6rem;
  border-radius: 2rem;
  font-size: 0.71rem;
  font-weight: 700;
  margin-left: 0.2rem;
  border: 1px solid transparent;
}
.md-typeset .outcome--bad { background: rgba(239, 68, 68, 0.13); color: #dc2626; border-color: rgba(239, 68, 68, 0.35); }
.md-typeset .outcome--good { background: rgba(34, 197, 94, 0.13); color: #16a34a; border-color: rgba(34, 197, 94, 0.35); }
.md-typeset .timeline__note {
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--md-default-fg-color--light);
  margin-top: 0.45rem;
}
@media screen and (max-width: 45em) {
  .md-typeset .timeline__row { grid-template-columns: 1fr; gap: 0.4rem; }
}