:root {
  --ink: #111111;
  --accent: #d92027;
  --line: #d9d9d9;
  --line-light: #e5e7eb;
  --paper: #ffffff;
  --muted: #686868;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shell: min(1440px, calc(100vw - 80px));
  --mono: "JetBrains Mono", monospace;
}

* { box-sizing: border-box; }

html {
  color: var(--ink);
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font: 14px/1.75 var(--mono);
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

button, a { font: inherit; letter-spacing: 0; }
a { color: inherit; }

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1, h2, p, dd, dt { overflow-wrap: break-word; }

.selfdev-shell {
  width: var(--shell);
  margin: 0 auto;
}

.selfdev-eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-hero { border-bottom: 1px solid var(--ink); }

.selfdev-hero__inner {
  display: grid;
  grid-template-columns: minmax(360px, 0.8fr) minmax(460px, 1.2fr);
  grid-template-rows: auto minmax(520px, auto);
  column-gap: clamp(52px, 7vw, 118px);
  padding-top: 24px;
}

.selfdev-hero__inner > *,
.selfdev-catalog-head__inner > * { min-width: 0; }

.selfdev-masthead {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-masthead a {
  text-decoration-color: var(--line);
  text-underline-offset: 4px;
}

.selfdev-masthead a:hover { text-decoration-color: var(--accent); }

.selfdev-hero__copy {
  grid-column: 2;
  grid-row: 2;
  align-self: center;
  max-width: 760px;
  padding: 64px 0;
  opacity: 0;
  transform: translateY(12px);
  animation: hero-in 520ms ease 80ms forwards;
}

.selfdev-hero h1 {
  max-width: 760px;
  margin: 20px 0 34px;
  font-size: clamp(34px, 3.2vw, 52px);
  font-weight: 700;
  line-height: 1.12;
}

.selfdev-hero__lead {
  max-width: 680px;
  margin: 0;
  font-size: 18px;
  line-height: 1.55;
}

.selfdev-cycle {
  position: relative;
  grid-column: 1;
  grid-row: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: center;
  gap: 26px 48px;
  padding: 64px 0;
}

.selfdev-cycle::before {
  position: absolute;
  top: 72px;
  bottom: 72px;
  left: 50%;
  width: 1px;
  background: var(--line);
  content: "";
}

.selfdev-cycle::after {
  position: absolute;
  top: 50%;
  left: calc(50% - 5px);
  width: 10px;
  height: 10px;
  border-radius: 9999px;
  background: var(--accent);
  content: "";
  transform: translateY(-50%);
}

.cycle-step {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 9px;
  align-items: center;
  min-height: 62px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.4;
}

.cycle-step:nth-child(odd)::after,
.cycle-step:nth-child(even)::before {
  position: absolute;
  top: 50%;
  width: 25px;
  border-top: 1px solid var(--line);
  content: "";
}

.cycle-step:nth-child(odd)::after { right: -25px; }
.cycle-step:nth-child(even)::before { left: -25px; }

.cycle-step__index,
.cycle-step__arrow { color: var(--accent); font-weight: 400; }
.cycle-step__label { font-weight: 400; }

.selfdev-catalog-intro {
  border-bottom: 1px solid var(--line);
}

.selfdev-catalog-intro__inner {
  display: grid;
  grid-template-columns: minmax(150px, 0.55fr) minmax(360px, 1.15fr) minmax(320px, 1fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
  padding: 38px 0 36px;
}

.selfdev-catalog-intro h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 400;
  line-height: 1.28;
}

.selfdev-catalog-note {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.selfdev-catalog-head {
  position: sticky;
  z-index: 4;
  top: 0;
  border-bottom: 1px solid var(--ink);
  background: rgb(255 255 255 / 96%);
}

.selfdev-catalog-head__inner {
  padding: 12px 0;
}

.selfdev-filter-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
}

.selfdev-filters {
  display: grid;
  grid-template-columns: minmax(72px, 0.58fr) repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.selfdev-filter {
  width: 100%;
  min-width: 0;
  min-height: 40px;
  padding: 7px 10px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 11px;
  line-height: 1.4;
  transition: background-color 140ms ease, color 140ms ease;
}

.selfdev-filter:hover { border-color: var(--ink); }
.selfdev-filter[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.selfdev-result-count {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
  white-space: nowrap;
}

.selfdev-artifacts { counter-reset: experiments; }

.selfdev-artifact {
  display: grid;
  grid-template-columns: minmax(320px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(40px, 5vw, 80px);
  align-items: start;
  padding: 72px 0 82px;
  border-bottom: 1px solid var(--ink);
  animation: artifact-in 300ms ease both;
}

.selfdev-artifact__media {
  position: sticky;
  top: 174px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
  background: var(--paper);
}

.selfdev-artifact__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 280ms ease;
}

.selfdev-artifact__media--gallery {
  display: grid;
  grid-template-columns: repeat(var(--gallery-columns), minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.selfdev-artifact__media--gallery img { min-width: 0; }

.selfdev-artifact[data-artifact="daily-self-control"] .selfdev-artifact__media img,
.selfdev-artifact[data-artifact="genome-review"] .selfdev-artifact__media img {
  object-fit: contain;
  background: var(--paper);
}

.selfdev-artifact:hover .selfdev-artifact__media img { transform: scale(1.01); }

.selfdev-artifact__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-artifact__number,
.selfdev-artifact__status { color: var(--accent); }

.selfdev-artifact__creator {
  color: var(--ink);
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.selfdev-artifact__creator:hover { text-decoration-color: var(--accent); }

.selfdev-artifact__heading h2 {
  margin: 20px 0 14px;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 400;
  line-height: 1.16;
  letter-spacing: -0.72px;
}

.selfdev-artifact__summary {
  max-width: 720px;
  margin: 0 0 38px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.55;
}

.selfdev-modules {
  margin-bottom: 40px;
  border-top: 1px solid var(--ink);
}

.selfdev-modules__heading,
.selfdev-install h3 {
  margin: 18px 0 10px;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
}

.selfdev-modules__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.selfdev-modules__item {
  display: grid;
  grid-template-columns: 34px minmax(150px, 0.75fr) minmax(0, 1.25fr);
  gap: 1px 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.selfdev-modules__number,
.selfdev-modules__cue {
  grid-row: 1 / 3;
  padding-top: 3px;
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-modules__number { color: var(--accent); }
.selfdev-modules__cue { color: var(--muted); }

.selfdev-modules__link {
  grid-column: 3;
  font-size: 15px;
  line-height: 1.45;
  text-decoration-color: var(--line);
  text-underline-offset: 4px;
}

.selfdev-modules__link:hover { text-decoration-color: var(--accent); }

.selfdev-modules__action {
  grid-column: 3;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.selfdev-install {
  margin-top: 34px;
  padding-top: 4px;
  border-top: 1px solid var(--ink);
}

.selfdev-install p {
  margin: 8px 0 0;
  font-size: 14px;
}

.selfdev-install blockquote {
  margin: 18px 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent);
  font-size: 18px;
  line-height: 1.5;
}

.selfdev-mechanism {
  margin: 0 0 42px;
  padding-top: 20px;
  border-top: 1px solid var(--ink);
}

.selfdev-mechanism__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-mechanism__header strong { font-weight: 400; }

.selfdev-mechanism__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: flex-end;
  color: var(--muted);
  font-size: 11px;
}

.selfdev-mechanism__legend span { position: relative; padding-left: 24px; }

.selfdev-mechanism__legend span::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 16px;
  border-top: 1px solid var(--ink);
  content: "";
}

.selfdev-mechanism__legend-observed::before {
  border-top-color: var(--accent) !important;
  border-top-style: dashed !important;
}

.selfdev-mechanism__flow {
  display: grid;
    grid-template-columns: minmax(0, 1fr) 74px minmax(0, 1fr) 74px minmax(0, 1fr) 74px minmax(0, 1fr);
  align-items: stretch;
  margin: 0;
  padding: 0;
  list-style: none;
}

.selfdev-mechanism__step {
  min-width: 0;
  min-height: 154px;
  padding: 14px 12px;
  border: 1px solid var(--line-light);
  border-top: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.selfdev-mechanism__step:nth-child(5),
.selfdev-mechanism__step:nth-child(7) { border-top-color: var(--accent); }

.selfdev-mechanism__step-index,
.selfdev-mechanism__step small {
  display: block;
  font-size: 11px;
  line-height: 1.35;
}

.selfdev-mechanism__step-index { margin-bottom: 18px; color: var(--accent); }
.selfdev-mechanism__step small { margin-bottom: 8px; color: var(--muted); }

.selfdev-mechanism__step p {
  margin: 0;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.45;
}

.selfdev-mechanism__connector {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  color: var(--ink);
}

.selfdev-mechanism__connector::before {
  position: absolute;
  right: 6px;
  left: 6px;
  border-top: 1px solid currentColor;
  content: "";
}

.selfdev-mechanism__connector::after {
  position: absolute;
  right: 5px;
  width: 6px;
  height: 6px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  content: "";
  transform: rotate(45deg);
}

.selfdev-mechanism__connector span {
  position: relative;
  z-index: 1;
    max-width: 72px;
  padding: 3px 4px;
  background: var(--paper);
  font-size: 9px;
  line-height: 1.2;
  text-align: center;
}

.selfdev-mechanism__connector--observed { color: var(--accent); }
.selfdev-mechanism__connector--observed::before { border-top-style: dashed; }

.selfdev-mechanism__fit {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 18px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.selfdev-mechanism__fit-item {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 14px 15px 0;
}

.selfdev-mechanism__fit-item + .selfdev-mechanism__fit-item {
  padding-right: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.selfdev-mechanism__fit dt { color: var(--ink); font-size: 11px; }
.selfdev-mechanism__fit-item--boundary dt { color: var(--accent); }

.selfdev-mechanism__fit dd {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.selfdev-evidence-list { margin: 0; border-top: 1px solid var(--ink); }

.selfdev-evidence-list__item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.selfdev-evidence-list__item--result { padding: 25px 0; }

.selfdev-evidence-list dt {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-evidence-list dd {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.75;
}

.selfdev-evidence-list__item--result dd { font-size: 18px; line-height: 1.5; }

.selfdev-artifact__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 24px;
}

.selfdev-artifact__tags span {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-artifact__tags small {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.selfdev-artifact__source {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 20px;
  border-bottom: 1px solid currentColor;
  font-size: 14px;
  text-decoration: none;
}

.selfdev-artifact__source:hover { color: var(--accent); }

.selfdev-noscript { padding: 64px 0; }

@keyframes hero-in {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes artifact-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1080px) {
  :root { --shell: min(100% - 48px, 980px); }

  .selfdev-hero__inner {
    grid-template-columns: minmax(300px, 0.8fr) minmax(380px, 1.2fr);
    column-gap: 40px;
  }

  .selfdev-cycle { gap: 20px 36px; }
  .cycle-step:nth-child(odd)::after { right: -19px; width: 19px; }
  .cycle-step:nth-child(even)::before { left: -19px; width: 19px; }

  .selfdev-catalog-head { position: static; }

  .selfdev-catalog-intro__inner {
    grid-template-columns: minmax(130px, 0.45fr) minmax(300px, 1fr) minmax(260px, 0.9fr);
    gap: 28px;
  }

  .selfdev-filter-panel {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .selfdev-filters { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .selfdev-artifact { grid-template-columns: 1fr; }

  .selfdev-artifact__media { position: static; max-width: 820px; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100vw - 32px); }

  .selfdev-shell {
    width: calc(100vw - 32px);
    max-width: calc(100vw - 32px);
    margin-right: 16px;
    margin-left: 16px;
  }

  .selfdev-hero__inner {
    display: flex;
    flex-direction: column;
    padding-top: 18px;
  }

  .selfdev-masthead { align-items: flex-start; font-size: 10px; }
  .selfdev-masthead span { max-width: 145px; text-align: right; }

  .selfdev-hero__copy { order: 1; padding: 52px 0 44px; }

  .selfdev-hero h1 {
    margin: 16px 0 24px;
    font-size: 36px;
    line-height: 1.16;
  }

  .selfdev-hero__lead { font-size: 16px; line-height: 1.55; }

  .selfdev-cycle {
    order: 2;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 0 40px 24px;
  }

  .selfdev-cycle::before { top: 8px; bottom: 48px; left: 4px; }
  .selfdev-cycle::after { top: 8px; left: 0; transform: none; }

  .cycle-step { min-height: 52px; border-bottom-color: var(--line); }

  .cycle-step:nth-child(odd)::after,
  .cycle-step:nth-child(even)::before {
    top: 50%;
    right: auto;
    left: -20px;
    width: 20px;
  }

  .selfdev-catalog-intro__inner {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 30px 0 28px;
  }

  .selfdev-catalog-intro h2 { font-size: 24px; }
  .selfdev-catalog-note { max-width: none; }

  .selfdev-catalog-head__inner { padding: 12px 0; }
  .selfdev-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .selfdev-filter { min-height: 42px; }

  .selfdev-artifact { gap: 30px; padding: 52px 0 62px; }
  .selfdev-artifact__heading h2 { font-size: 28px; letter-spacing: 0; }
  .selfdev-artifact__summary { margin-bottom: 30px; font-size: 16px; }
  .selfdev-modules__item { grid-template-columns: 28px minmax(0, 1fr); gap: 3px 10px; }
  .selfdev-modules__number { grid-column: 1; grid-row: 1 / 4; }
  .selfdev-modules__cue { grid-column: 2; grid-row: 1; }
  .selfdev-modules__link { grid-column: 2; grid-row: 2; }
  .selfdev-modules__action { grid-column: 2; grid-row: 3; }
  .selfdev-install blockquote { font-size: 16px; }

  .selfdev-mechanism { margin-bottom: 34px; }
  .selfdev-mechanism__header { align-items: flex-start; flex-direction: column; gap: 10px; }
  .selfdev-mechanism__legend { justify-content: flex-start; }
  .selfdev-mechanism__flow { grid-template-columns: 1fr; }

  .selfdev-mechanism__step { min-height: 0; padding: 14px 16px 16px; }
  .selfdev-mechanism__step-index { margin-bottom: 12px; }
  .selfdev-mechanism__step p { font-size: 13px; }

  .selfdev-mechanism__connector { min-height: 44px; }

  .selfdev-mechanism__connector::before {
    inset: 5px auto 5px 50%;
    border-top: 0;
    border-left: 1px solid currentColor;
  }

  .selfdev-mechanism__connector--observed::before { border-left-style: dashed; }

  .selfdev-mechanism__connector::after {
    right: auto;
    bottom: 4px;
    left: calc(50% - 3px);
    transform: rotate(135deg);
  }

  .selfdev-mechanism__connector span { max-width: none; padding: 4px 8px; }
  .selfdev-mechanism__fit { grid-template-columns: 1fr; }

  .selfdev-mechanism__fit-item {
    grid-template-columns: 78px minmax(0, 1fr);
    padding: 14px 0;
  }

  .selfdev-mechanism__fit-item + .selfdev-mechanism__fit-item {
    padding: 14px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .selfdev-evidence-list__item {
    grid-template-columns: 1fr;
    gap: 7px;
    padding: 18px 0;
  }

  .selfdev-evidence-list__item--result dd { font-size: 16px; }
  .selfdev-artifact__tags small { flex-basis: 100%; margin: 8px 0 0; }
}

@media (max-width: 360px) {
  .selfdev-hero h1 { font-size: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .selfdev-hero__copy,
  .selfdev-artifact {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .selfdev-artifact__media img,
  .selfdev-filter { transition: none; }
}