.thesis {
  position: relative;
  padding-block: clamp(3rem, 6vw, 5rem) var(--section-y);
  background:
    radial-gradient(60% 40% at 90% 30%, rgba(143, 227, 245, 0.28), transparent 70%),
    radial-gradient(50% 30% at 0% 70%, rgba(255, 180, 140, 0.18), transparent 70%),
    var(--paper);
}

.thesis__intro { display: grid; gap: var(--space-6); }
.thesis__statement {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 550;
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-variation-settings: "opsz" 96, "wdth" 88;
  max-width: 17ch;
  color: var(--on-paper);
  text-wrap: balance;
}
.thesis__statement .is-accent { color: var(--accent-deep); }

/* ---- Convergence ---- */
.conv { margin-top: clamp(5rem, 11vw, 9rem); }
.conv__head {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-5) var(--space-8); align-items: end;
}
.conv__title { font-size: var(--fs-h2); max-width: 16ch; }
.conv__lede { color: var(--on-paper-muted); font-size: var(--fs-lead); max-width: 46ch; line-height: 1.5; }

.conv__stage {
  position: relative;
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: minmax(0, 290px) minmax(80px, 1fr) minmax(0, 400px);
  align-items: stretch;
}
.conv__sources { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.conv__sources li {
  display: grid; gap: 2px; padding: 14px 18px;
  border-radius: var(--r-md);
  background: var(--glass-light);
  box-shadow: inset 0 0 0 1px var(--paper-line);
  backdrop-filter: blur(8px);
}
.conv__srcname { font-weight: 600; letter-spacing: -0.01em; }
.conv__srcmeta { color: var(--on-paper-faint); font-size: 10px; }
.conv__linewrap { position: relative; min-height: 100%; }
.conv__lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.conv__stage > .conv__sources, .conv__stage > .conv__record { align-self: center; }

.conv__record {
  position: relative;
  padding: 28px;
  border-radius: var(--r-xl);
  background: var(--ink-900);
  color: var(--on-ink);
  box-shadow: var(--shadow-paper), 0 40px 80px -30px rgba(10, 111, 140, 0.45);
}
.conv__record::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(143, 227, 245, 0.8), transparent 40%, rgba(255, 180, 140, 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.conv__recordlabel { color: var(--accent-soft); display: inline-flex; gap: 8px; align-items: center; }
.conv__recordname { margin-top: 10px; font-family: var(--font-display); font-size: 1.6rem; font-weight: 600; letter-spacing: -0.03em; }
.conv__record ul { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 8px; }
.conv__record li {
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  padding: 11px 14px; border-radius: 12px; background: rgba(255, 255, 255, 0.05); font-size: 0.9rem;
}
.conv__srcs { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.06em; color: var(--on-ink-faint); white-space: nowrap; }
.conv__recordfoot { margin-top: 16px; font-size: 0.8rem; color: var(--closed); }

/* ---- Principles ---- */
.prin {
  margin-top: clamp(6rem, 12vw, 10rem);
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: var(--space-8);
  align-items: center;
}
.prin__list { display: grid; }
.prin__item {
  all: unset; box-sizing: border-box; cursor: pointer;
  display: grid; gap: 8px;
  padding: 26px 0 26px 28px;
  position: relative;
  border-top: 1px solid var(--paper-line);
}
.prin__item::before {
  content: ""; position: absolute; left: 0; top: 26px; bottom: 26px; width: 2px; border-radius: 2px;
  background: var(--accent); transform: scaleY(0); transform-origin: top;
  transition: transform var(--dur-med) var(--ease-out);
}
.prin__item.is-on::before { transform: scaleY(1); }
.prin__item:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 8px; }
.prin__title {
  font-family: var(--font-display); font-size: var(--fs-h3); font-weight: 600; letter-spacing: -0.03em;
  color: var(--on-paper-faint); transition: color var(--dur-med);
}
.prin__item.is-on .prin__title, .prin__item:hover .prin__title { color: var(--on-paper); }
.prin__body { color: var(--on-paper-muted); max-width: 44ch; }
.prin__proof { color: var(--accent-deep); }
.prin__item:not(.is-on) .prin__body, .prin__item:not(.is-on) .prin__proof { display: none; }
.prin__link { padding: 20px 0 0 28px; border-top: 1px solid var(--paper-line); }

.prin__visual {
  position: relative; min-height: 440px; border-radius: var(--r-xl);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-950));
  box-shadow: var(--shadow-paper);
  overflow: hidden; display: grid;
  color: var(--on-ink);
}
.prin__visual::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 80% 0%, rgba(34, 195, 230, 0.35), transparent 70%);
}
.prin__pane { position: relative; display: grid; padding: clamp(24px, 4vw, 44px); }

.viz { display: grid; align-content: center; gap: 18px; }
.viz__cap { color: var(--on-ink-muted); max-width: 38ch; }
.viz__big { font-family: var(--font-display); font-size: clamp(4rem, 9vw, 7.5rem); font-weight: 600; letter-spacing: -0.06em; line-height: 0.9; }
.viz__big span { color: var(--accent-soft); }
.viz__grid { display: grid; grid-template-columns: repeat(20, 1fr); gap: 6px; max-width: 460px; }
.viz__grid i { aspect-ratio: 1; border-radius: 3px; background: var(--accent-soft); }

.viz--evidence { justify-items: stretch; gap: 0; }
.viz__suggest {
  display: grid; gap: 6px; padding: 18px 20px; border-radius: 16px;
  background: rgba(255, 255, 255, 0.06); box-shadow: inset 0 0 0 1px var(--ink-line-strong);
}
.viz__suggest .label { color: var(--accent-soft); }
.viz__why { display: inline-flex; gap: 6px; align-items: center; font-size: 0.82rem; color: var(--evidence); }
.viz__link { height: 44px; width: 40px; margin-left: 24px; }
.viz__doc {
  display: grid; gap: 10px; padding: 20px 22px; border-radius: 16px;
  background: #f6f9fa; color: #11212b;
  font-family: Georgia, "Times New Roman", serif; font-size: 1rem; line-height: 1.6;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8);
}
.viz__doc .label { font-family: var(--font-mono); color: #667b88; }
.viz__doc mark { background: rgba(243, 195, 90, 0.5); color: #3a2a00; padding: 1px 3px; border-radius: 3px; }

.viz--adopt { grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 32px; }
.viz__ring { width: clamp(150px, 18vw, 210px); height: auto; }
.viz__ringbg { fill: none; stroke: rgba(255, 255, 255, 0.08); stroke-width: 12; }
.viz__ringfg { fill: none; stroke: var(--accent-soft); stroke-width: 12; stroke-linecap: round; transform: rotate(-90deg); transform-origin: 90px 90px; }
.viz__ringtext { fill: var(--on-ink); font-family: var(--font-display); font-weight: 600; font-size: 34px; letter-spacing: -0.04em; }
.viz__adoptcopy { display: grid; gap: 14px; }
.viz__quote { font-family: var(--font-display); font-size: 1.35rem; line-height: 1.25; letter-spacing: -0.02em; }
.viz__adoptcopy .label { color: var(--on-ink-faint); }

@media (max-width: 960px) {
  .conv__head { grid-template-columns: minmax(0, 1fr); }
  .conv__stage { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .conv__sources { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .conv__linewrap { display: none; }
  .conv__record { justify-self: stretch; }
  .prin { grid-template-columns: minmax(0, 1fr); }
  .prin__visual { min-height: 380px; order: -1; }
}
@media (max-width: 560px) {
  .conv__sources li { padding: 12px 14px; }
  .conv__record { padding: 22px; }
  .conv__record li { flex-direction: column; align-items: flex-start; gap: 2px; }
  .viz--adopt { grid-template-columns: minmax(0, 1fr); }
  .viz__grid { grid-template-columns: repeat(12, 1fr); }
  .viz__grid i:nth-child(n + 73) { display: none; }
  .prin__item { padding-left: 20px; }
}

/* Seam into the ink platform section */
.thesis::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 200px;
  background: linear-gradient(to bottom, rgba(7, 13, 20, 0), var(--ink-950));
  pointer-events: none;
}


.viz__big span { font-size: 0.4em; letter-spacing: -0.03em; margin-left: 0.1em; }
.viz__sample { margin-top: 14px; font-size: 0.75rem; color: var(--on-ink-faint); }
.viz--adopt { grid-template-columns: minmax(0, 1fr); }
.viz__nolist { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.viz__nolist li {
  display: grid; gap: 4px; padding: 18px 22px; border-radius: 16px;
  background: rgba(255, 255, 255, 0.05); box-shadow: inset 0 0 0 1px var(--ink-line-strong);
}
.viz__nolist strong { font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; letter-spacing: -0.03em; }
.viz__nolist span { color: var(--on-ink-muted); }

/* ---- Business principle visuals ---- */
.conv__record li > span:first-child { display: inline-flex; gap: 8px; align-items: center; }
.conv__record li svg { color: var(--closed); flex: none; }
.viz__label { color: var(--on-ink-faint); }
.viz__tasks { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.viz__tasks li {
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 14px 18px; border-radius: 14px; background: rgba(255, 255, 255, 0.05);
}
.viz__strike { color: var(--on-ink-muted); text-decoration: line-through; text-decoration-color: rgba(255, 255, 255, 0.35); }
.viz__how {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600;
  padding: 4px 10px; border-radius: 99px; background: rgba(111, 220, 140, 0.14); color: var(--closed);
}
.viz--hub { justify-items: center; text-align: center; }
.hub { --r: clamp(95px, 13vw, 140px); position: relative; width: calc(var(--r) * 2 + 90px); aspect-ratio: 1; max-width: 100%; }
.hub::before { content: ""; position: absolute; inset: 45px; border-radius: 50%; border: 1px dashed var(--ink-line-strong); }
.hub__core {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 84px; height: 84px; border-radius: 50%; display: grid; place-items: center;
  background: var(--ink-900); box-shadow: 0 0 0 1px var(--ink-line-strong), 0 0 60px rgba(34, 195, 230, 0.35);
}
.hub__node { position: absolute; left: 50%; top: 50%; width: 0; height: 0; transform: rotate(var(--a)) translateX(var(--r)) rotate(calc(-1 * var(--a))); }
.hub__label {
  position: absolute; transform: translate(-50%, -50%); white-space: nowrap;
  padding: 7px 12px; border-radius: 10px; font-size: 0.8rem; font-weight: 550;
  background: rgba(255, 255, 255, 0.08); box-shadow: inset 0 0 0 1px var(--ink-line-strong);
}
.viz--hub .viz__cap { max-width: 42ch; }