/* ===================================================================
 * # the method: how i work + problem-first project cards
 *
 * One method (Define, Simulate, Build, Test, Refine) shown in two places:
 * the "How I work" section, and a row of five LEDs on every project card.
 * The copper trace and the amber LEDs are the only new colors; everything
 * else follows main.css.
 *
 * ------------------------------------------------------------------- */

.s-how {
  --how-copper: #b8692f;
  --how-copper-text: #93501f;
  --how-led: #f2a900;
  --how-led-ring: #c98700;
  --how-muted: rgba(0, 0, 0, 0.6);
  --how-rule: #e0e0e0;
  --how-gap: 2.4rem;

  background-color: #ffffff;
  padding: 9rem 0 9.6rem;
}

.how__header {
  max-width: 760px;
  margin-bottom: 5.4rem;
}

.how__eyebrow {
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.5;
  text-transform: uppercase;
  letter-spacing: .25rem;
  color: #1d28a1;
  margin: 0 0 1.2rem;
}

.how__title {
  font-family: "Libre Baskerville", serif;
  font-size: 4.4rem;
  line-height: 1.2;
  letter-spacing: -.1rem;
  margin: 0 0 1.8rem;
}

.how__intro {
  font-size: 1.9rem;
  line-height: 1.6;
  color: rgba(0, 0, 0, 0.7);
  margin: 0;
}

/* steps
 * ------------------------------------------------------------------- */
.how__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 3.2rem var(--how-gap);
}

/* the trace runs from the first LED to the last one */
.how__steps::before {
  content: "";
  position: absolute;
  top: .8rem;
  left: .9rem;
  right: calc((100% - 4 * var(--how-gap)) / 5 - .9rem);
  height: 2px;
  background: var(--how-copper);
}

.how__step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "led" "name" "media" "text" "proj";
  align-content: start;
  row-gap: 1.2rem;
  padding: 0;
  margin: 0;
}

.how__led {
  grid-area: led;
  position: relative;
  z-index: 1;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--how-led);
  border: 2px solid var(--how-led-ring);
  box-shadow: 0 0 0 4px rgba(242, 169, 0, 0.18), 0 0 12px rgba(242, 169, 0, 0.55);
}

.how__name {
  grid-area: name;
  font-family: "Libre Baskerville", serif;
  font-size: 2.4rem;
  line-height: 1.2;
  margin: 0;
}

.how__num {
  display: block;
  font-family: "Nunito Sans", sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: var(--how-muted);
  margin-bottom: .4rem;
}

.how__media {
  grid-area: media;
  display: block;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--how-rule);
  border-radius: 3px;
  overflow: hidden;
  background: #ffffff;
}

.how__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-transition: transform 0.3s ease-in-out;
  transition: transform 0.3s ease-in-out;
}

.how__media:hover img {
  transform: scale(1.05);
}

/* charts keep their axes visible at any crop */
.how__media--chart img {
  object-fit: contain;
}

/* the Define step shows its requirements instead of a photo */
.how__spec {
  list-style: none;
  margin: 0;
  padding: .8rem 1.4rem;
  display: grid;
  align-content: center;
  font-family: Consolas, "Andale Mono", Courier, "Courier New", monospace;
  font-size: 1.3rem;
  line-height: 1.35;
  color: #000000;
}

.how__spec li {
  display: flex;
  gap: .8rem;
  padding: .7rem 0;
  border-bottom: 1px solid var(--how-rule);
}

.how__spec li:last-child {
  border-bottom: 0;
}

.how__spec b {
  flex: none;
  color: var(--how-copper-text);
}

.how__text {
  grid-area: text;
  font-size: 1.5rem;
  line-height: 1.6;
  color: rgba(0, 0, 0, 0.8);
  margin: 0;
}

.how__project {
  grid-area: proj;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
}

.how__project span {
  display: block;
  font-weight: 400;
  font-size: 1.3rem;
  color: var(--how-muted);
}

.how__legend {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 5.4rem 0 0;
  font-size: 1.5rem;
  line-height: 1.5;
  color: var(--how-muted);
}

.how__legend .how__led {
  flex: none;
  width: 1.4rem;
  height: 1.4rem;
}

@media (prefers-reduced-motion: reduce) {
  .how__media img, .how__media:hover img {
    transition: none;
    transform: none;
  }
}

/* -------------------------------------------------------------------
 * responsive:
 * how i work
 * ------------------------------------------------------------------- */
@media only screen and (max-width:1000px) {
  .how__steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 4rem;
    padding-left: 4rem;
  }
  /* vertical trace: each step draws the segment down to the next LED */
  .how__steps::before {
    display: none;
  }
  .how__step:not(:last-child)::before {
    content: "";
    position: absolute;
    top: 1rem;
    bottom: -4.6rem;
    left: -3.2rem;
    width: 2px;
    background: var(--how-copper);
  }
  .how__step {
    grid-template-columns: 24rem minmax(0, 1fr);
    grid-template-areas: "media name" "media text" "media proj";
    column-gap: 2.8rem;
  }
  .how__step .how__led {
    position: absolute;
    left: -4rem;
    top: .2rem;
  }
}

@media only screen and (max-width:600px) {
  .s-how {
    padding: 6rem 0 6.4rem;
  }
  .how__title {
    font-size: 3.2rem;
  }
  .how__intro {
    font-size: 1.7rem;
  }
  .how__steps {
    padding-left: 3.2rem;
  }
  .how__step .how__led {
    left: -3.2rem;
  }
  .how__step:not(:last-child)::before {
    left: -2.4rem;
  }
  .how__step {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "name" "media" "text" "proj";
  }
  .how__media {
    aspect-ratio: 16 / 9;
  }
}


/* ===================================================================
 * # project cards: problem first
 *
 * Variant of the template's .item-entry card: the problem leads, then
 * one line on what I did, then the five step LEDs, each labelled with its
 * step name. A lit LED means the project page documents that step.
 *
 * ------------------------------------------------------------------- */

.entries .item-entry--problem {
  display: flex;
  flex-direction: column;
  text-align: left;
  padding-bottom: 0;
}

.entries .item-entry--problem .item-entry__thumb-link {
  display: block;
}

.entries .item-entry--problem .item-entry__thumb-link img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.entries .item-entry--problem .item-entry__text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  padding: 2rem 2.2rem 2.2rem;
}

.item-entry__meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
}

.item-entry__meta span:first-child {
  color: #1d28a1;
}

.item-entry__problem {
  font-family: "Libre Baskerville", serif;
  font-size: 2rem;
  line-height: 1.4;
  margin: 0;
}

.item-entry__problem a {
  color: #000000;
  border-bottom: 1px solid transparent;
}

.item-entry__problem a:hover, .item-entry__problem a:focus {
  border-bottom: 1px solid rgba(0, 0, 0, 0.15);
}

.item-entry__did {
  font-size: 1.5rem;
  line-height: 1.6;
  color: rgba(0, 0, 0, 0.7);
  margin: 0;
}

/* LEDs sit at the bottom of the card so rows line up across the grid */
.item-entry__steps {
  margin: auto 0 0;
  padding-top: 1.4rem;
  border-top: 1px solid #e0e0e0;
}

/* full step names, spread across the card; the narrowest card (~245px of
 * text width, 4 columns just above 1480px) still fits all five on one line */
.leds {
  display: flex;
  justify-content: space-between;
  gap: .8rem;
}

.led-step {
  display: grid;
  justify-items: center;
  gap: .6rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(0, 0, 0, 0.4);
}

.led-step i {
  display: block;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  border: 2px solid #c4c4c4;
  background: #ffffff;
}

.led-step.is-on {
  color: #000000;
}

.led-step.is-on i {
  background: #f2a900;
  border-color: #c98700;
  box-shadow: 0 0 0 3px rgba(242, 169, 0, 0.16), 0 0 8px rgba(242, 169, 0, 0.5);
}

.item-entry__name {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
}

@media only screen and (max-width:400px) {
  .entries .item-entry--problem .item-entry__text {
    padding: 1.8rem 1.8rem 2rem;
  }
  .item-entry__problem {
    font-size: 1.9rem;
  }
}



/* ===================================================================
 * # project cards: hover previews
 *
 * js/card-preview.js fills the thumbnail with a short sequence of frames
 * from the case study while the card is hovered or focused. The chip
 * names the step on show and the matching LED under the card lights up.
 *
 * ------------------------------------------------------------------- */

/* the template's white wash and "..." would cover the preview */
.entries .item-entry--problem .item-entry__thumb-link::before,
.entries .item-entry--problem .item-entry__thumb-link::after {
  display: none;
}

.card-preview {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  overflow: hidden;
  background: #ffffff;
  pointer-events: none; /* clicks still reach the thumbnail link */
  opacity: 0;
  -webkit-transition: opacity 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out;
}

.card-preview.is-on {
  opacity: 1;
}

.card-preview__media {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  -webkit-transition: opacity 0.45s ease-in-out;
  transition: opacity 0.45s ease-in-out;
}

.card-preview__media.is-active {
  opacity: 1;
}

/* a card with a single still drifts slowly instead of cycling */
.card-preview.is-single .card-preview__media.is-active {
  animation: card-preview-drift 7s ease-out both;
}

@keyframes card-preview-drift {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.08) translate(-1.5%, -1%);
  }
}

/* the step on show, or the board name on listing cards */
.card-preview__chip {
  position: absolute;
  top: 1.2rem;
  left: 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  padding: .6rem 1.1rem .6rem .8rem;
  border-radius: 2rem;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .15rem;
  text-transform: uppercase;
  color: #000000;
}

.card-preview__chip i {
  flex: none;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: #f2a900;
  border: 1px solid #c98700;
  box-shadow: 0 0 6px rgba(242, 169, 0, 0.7);
}

.card-preview.is-labelled .card-preview__chip i {
  background: #1d28a1;
  border-color: #1d28a1;
  box-shadow: none;
}

/* one segment per frame; the current one fills while it is on show */
.card-preview__bar {
  position: absolute;
  left: 1.2rem;
  right: 1.2rem;
  bottom: 1.2rem;
  display: flex;
  gap: .4rem;
}

.card-preview__bar i {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(#f2a900, #f2a900) 0 0 / 0% 100% no-repeat, rgba(0, 0, 0, 0.25);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
  -webkit-transition: background-size 0s linear;
  transition: background-size 0s linear;
}

.card-preview__bar i.is-now, .card-preview__bar i.is-done {
  background-size: 100% 100%;
}

/* the LED of the step on show stands out; the others step back */
.item-entry--problem .led-step {
  -webkit-transition: opacity 0.3s ease-in-out, color 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out, color 0.3s ease-in-out;
}

.item-entry--problem .led-step i {
  -webkit-transition: transform 0.3s ease-in-out;
  transition: transform 0.3s ease-in-out;
}

.item-entry--problem.is-previewing .leds:has(.is-current) .led-step:not(.is-current) {
  opacity: .45;
}

.item-entry--problem.is-previewing .led-step.is-current {
  color: #1d28a1;
}

.item-entry--problem.is-previewing .led-step.is-current i {
  transform: scale(1.4);
}

@media (prefers-reduced-motion: reduce) {
  .card-preview, .card-preview__media,
  .item-entry--problem .led-step, .item-entry--problem .led-step i {
    transition: none;
  }
  .card-preview.is-single .card-preview__media.is-active {
    animation: none;
  }
  .card-preview__bar i {
    transition-duration: 0s !important;
  }
}

/* ===================================================================
 * # case studies: the five steps
 *
 * Every project page is grouped into the same five steps. A strip of
 * LEDs under the intro shows which steps the page documents (lit LEDs
 * link to their section); each documented step then opens with a
 * .cs-step__title. Steps with nothing to show are left out of the body
 * and stay unlit in the strip.
 *
 * ------------------------------------------------------------------- */

.cs-steps {
  margin: 0 0 1.2rem;
  padding: 2rem 2.4rem 2.2rem;
  border: 1px solid #e0e0e0;
  border-radius: 3px;
}

.cs-steps__label {
  margin: 0 0 1.8rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.6);
}

.cs-steps__label a {
  color: #1d28a1;
}

.cs-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

/* the copper trace runs through the LED centres, first column to last */
.cs-steps__list::before {
  content: "";
  position: absolute;
  top: calc(.8rem - 1px);
  left: 10%;
  right: 10%;
  height: 2px;
  background: #b8692f;
}

.cs-steps__item {
  display: block;
  margin: 0;
  padding: 0;
}

.cs-steps__item > a, .cs-steps__item > span {
  display: grid;
  justify-items: center;
  gap: .8rem;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  color: rgba(0, 0, 0, 0.45);
}

.cs-steps__item i {
  position: relative;
  z-index: 1;
  display: block;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  border: 2px solid #c4c4c4;
  background: #ffffff;
}

.cs-steps__item.is-on > a {
  color: #000000;
}

.cs-steps__item.is-on > a:hover, .cs-steps__item.is-on > a:focus {
  color: #1d28a1;
}

.cs-steps__item.is-on i {
  background: #f2a900;
  border-color: #c98700;
  box-shadow: 0 0 0 3px rgba(242, 169, 0, 0.16), 0 0 8px rgba(242, 169, 0, 0.5);
}

/* step headings
 * ------------------------------------------------------------------- */
.cs-step__title {
  clear: both;
  margin: 7.2rem 0 2.4rem;
  padding-top: 3.6rem;
  border-top: 1px solid #e0e0e0;
  font-family: "Libre Baskerville", serif;
  font-size: 3.6rem;
  line-height: 1.2;
  letter-spacing: -.1rem;
  scroll-margin-top: 2.4rem;
}

.cs-step__num {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  font-family: "Nunito Sans", sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: #93501f;
}

.cs-step__num::before {
  content: "";
  flex: none;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  background: #f2a900;
  border: 2px solid #c98700;
  box-shadow: 0 0 0 3px rgba(242, 169, 0, 0.16), 0 0 8px rgba(242, 169, 0, 0.5);
}

/* the first subsection sits closer to its step title */
.cs-step__title + h3, .cs-step__title + h4 {
  margin-top: 3.6rem;
}

.cs-steps + .cs-step__title {
  margin-top: 4.8rem;
}

/* optional closing block after the last step: repository, references */
.cs-after__title {
  clear: both;
  margin-top: 7.2rem;
  padding-top: 3.6rem;
  border-top: 1px solid #e0e0e0;
}

/* Define: what the project had to do, as a short spec sheet */
.cs-spec {
  list-style: none;
  margin: 0 0 3rem;
  padding: 0;
  border-top: 1px solid #e0e0e0;
}

/* the key hangs in a fixed left column; the value can hold inline
 * markup (links, code) because the row is not a grid */
.cs-spec li {
  position: relative;
  display: block;
  margin: 0;
  padding: 1rem 0 1rem 12.6rem;
  border-bottom: 1px solid #e0e0e0;
  font-size: 1.6rem;
  line-height: 1.6;
}

.cs-spec b {
  position: absolute;
  left: 0;
  top: 1rem;
  width: 11rem;
  font-family: Consolas, "Andale Mono", Courier, "Courier New", monospace;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.8;
  color: #93501f;
}

@media only screen and (max-width:600px) {
  .cs-steps {
    padding: 1.6rem 1.2rem 1.8rem;
  }
  .cs-steps__item > a, .cs-steps__item > span {
    font-size: 1.2rem;
  }
  .cs-step__title {
    margin-top: 6rem;
    padding-top: 3rem;
    font-size: 3rem;
  }
  .cs-spec li {
    padding-left: 0;
  }
  .cs-spec b {
    position: static;
    display: block;
    width: auto;
  }
}


/* ===================================================================
 * # case studies: system pages
 *
 * For pages that tie several projects together (bajasae.html): a block
 * diagram of how the parts connect, and a card per part saying where it
 * sits and what it does, linking to its own case study.
 *
 * ------------------------------------------------------------------- */

.cs-diagram {
  margin: 3rem 0 1.2rem;
  padding: 2rem;
  border: 1px solid #e0e0e0;
  border-radius: 3px;
  background: #ffffff;
  overflow-x: auto;
}

.cs-diagram svg {
  display: block;
  width: 100%;
  min-width: 64rem; /* narrow screens scroll the diagram instead of shrinking its text */
  height: auto;
  font-family: "Nunito Sans", sans-serif;
}

/* shown only while the diagram is wider than the screen */
.cs-diagram__hint {
  display: none;
}

@media only screen and (max-width:760px) {
  .cs-diagram__hint {
    display: inline;
  }
}

.cs-diagram a rect {
  -webkit-transition: fill 0.2s ease-in-out;
  transition: fill 0.2s ease-in-out;
}

.cs-diagram a:hover rect, .cs-diagram a:focus rect {
  fill: #eef0fa;
}

.cs-parts {
  list-style: none;
  margin: 2.4rem 0 3.6rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3.6rem 2.4rem;
}

.cs-part {
  display: block;
  margin: 0;
  padding: 0;
}

.cs-part__media {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid #e0e0e0;
  border-radius: 3px;
  background: #ffffff;
}

.cs-part__media img,
.entry__main .cs-part__media img { /* beats the template's full-bleed article image margins */
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  margin: 0;
  object-fit: cover;
  -webkit-transition: transform 0.3s ease-in-out;
  transition: transform 0.3s ease-in-out;
}

.cs-part__media:hover img {
  transform: scale(1.04);
}

.cs-part__where {
  margin: 1.4rem 0 .4rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: #93501f;
}

.cs-part__title {
  margin: 0 0 .8rem;
  font-size: 2.1rem;
}

.cs-part__title a {
  color: #000000;
}

.cs-part__title a:hover, .cs-part__title a:focus {
  color: #1d28a1;
}

.cs-part__text {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.6;
}

@media only screen and (max-width:600px) {
  .cs-diagram {
    padding: 1.2rem;
  }
  .cs-parts {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .cs-part__media img, .cs-diagram a rect {
    transition: none;
  }
  .cs-part__media:hover img {
    transform: none;
  }
}


/* ===================================================================
 * # case studies: credits
 *
 * A short box under the intro: my role, the team, recognition, and the
 * third-party material the page uses. Only rows with evidence are used.
 *
 * ------------------------------------------------------------------- */

.cs-credits {
  margin: 0 0 3rem;
  padding: 1rem 2.4rem;
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-left: 3px solid #b8692f;
  border-radius: 3px;
}

.cs-credits dl {
  margin: 0;
}

.cs-credits dl > div {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  gap: 1.6rem;
  padding: 1rem 0;
  border-bottom: 1px solid #eeeeee;
}

.cs-credits dl > div:last-child {
  border-bottom: 0;
}

.cs-credits dt {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 2.1;
  letter-spacing: .2rem;
  text-transform: uppercase;
  color: #93501f;
}

.cs-credits dd {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.6;
}

@media only screen and (max-width:600px) {
  .cs-credits {
    padding: .8rem 1.6rem;
  }
  .cs-credits dl > div {
    grid-template-columns: minmax(0, 1fr);
    gap: .2rem;
  }
}


/* ===================================================================
 * # homepage: project threads
 *
 * The project cards are grouped into threads: one row per thread, oldest
 * project first, wrapping onto new lines as needed. Each card's step
 * lights sit right under its photo on a copper trace; js/threads.js
 * joins the traces between cards (solid when a project was carried into
 * the next, dashed when it just came next) and drops them through a via
 * where a thread wraps. One-offs use the same cards without the trace.
 *
 * ------------------------------------------------------------------- */

/* the threads use the full wide row; the template narrows .entries-wrap for its 4-column grid */
.entries-wrap.threads-wrap {
  width: 94%;
  max-width: 1440px;
}

.threads-head {
  max-width: 80rem;
  padding-top: 2.4rem;
  margin-bottom: 1.2rem;
}

.threads-head__eyebrow {
  margin: 0 0 1.2rem;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .25rem;
  text-transform: uppercase;
  color: #1d28a1;
}

.threads-head__title {
  margin: 0 0 1.6rem;
  font-family: "Libre Baskerville", serif;
  font-size: 4.4rem;
  line-height: 1.2;
  letter-spacing: -.1rem;
}

.threads-head__intro {
  margin: 0 0 1.6rem;
  font-size: 1.9rem;
  line-height: 1.6;
  color: rgba(0, 0, 0, 0.7);
}

.threads-key {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 2.8rem;
  margin: 0;
  font-size: 1.4rem;
  line-height: 1.5;
  color: rgba(0, 0, 0, 0.6);
}

.threads-key span {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}

.threads-key i {
  display: inline-block;
  width: 3.2rem;
  height: 2px;
  background: #b8692f;
}

.threads-key i.is-dashed {
  background: repeating-linear-gradient(90deg, #b8692f 0 5px, transparent 5px 9px);
}

.thread {
  display: grid;
  grid-template-columns: 22rem minmax(0, 1fr);
  gap: 2.4rem 4rem;
  align-items: start;
  padding: 4.8rem 0;
  border-top: 1px solid #e0e0e0;
}

.threads-head + .thread {
  margin-top: 3.6rem;
}

.thread__name {
  margin: 0 0 .6rem;
  font-family: "Libre Baskerville", serif;
  font-size: 2.6rem;
  line-height: 1.2;
}

.thread__meta {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .15rem;
  text-transform: uppercase;
  color: #93501f;
}

.thread__meta a {
  color: #93501f;
  border-bottom: 1px solid rgba(147, 80, 31, 0.35);
}

.thread__meta a:hover, .thread__meta a:focus {
  color: #1d28a1;
  border-color: #1d28a1;
}

.thread__story {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.55;
  color: rgba(0, 0, 0, 0.65);
}

.entries.thread__cards {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(24rem, 1fr));
  gap: 4rem 3.6rem;
  min-width: 0;
}

.entries.thread__cards .col-block {
  flex: none;
  width: auto;
  max-width: none;
  padding: 0;
  margin: 0;
}

/* step lights under the photo, on a trace that runs edge to edge */
.thread .item-entry__steps {
  margin: 0 0 .4rem;
  padding-top: 0;
  border-top: 0;
}

.thread .item-entry__name {
  margin-top: auto;
}

.thread .leds {
  position: relative;
}

.thread .leds::before {
  content: "";
  position: absolute;
  top: calc(.6rem - 1px);
  left: -2.2rem;
  right: -2.2rem;
  height: 2px;
  background: #b8692f;
}

.thread .led-step i {
  position: relative;
  z-index: 1;
}

/* drawn by js/threads.js between cards */
.thread__trace {
  position: absolute;
  height: 2px;
  background: repeating-linear-gradient(90deg, #b8692f 0 5px, transparent 5px 9px);
  pointer-events: none;
}

.thread__trace.is-carried {
  background: #b8692f;
}

.thread__via {
  position: absolute;
  z-index: 2;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: inset 0 0 0 2.5px #b8692f;
  pointer-events: none;
}

@media only screen and (max-width:1000px) {
  .thread {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
  .threads-head__title {
    font-size: 3.6rem;
  }
}

@media only screen and (max-width:600px) {
  .entries-wrap.threads-wrap {
    width: auto;
  }
  .threads-head__title {
    font-size: 3rem;
  }
  .threads-head__intro {
    font-size: 1.7rem;
  }
}


/* ===================================================================
 * # case studies: thread strip
 *
 * Under the intro of every case study that belongs to a thread: the
 * thread's projects as small thumbnails in homepage order, this project
 * lit, joined by the same copper traces (drawn by js/threads.js). Written
 * into the pages by tools/update_cards.py from the homepage threads.
 *
 * ------------------------------------------------------------------- */

.cs-thread {
  margin: 0 0 3.2rem;
}

.cs-thread__label {
  margin: 0 0 1.4rem;
  font-size: 1.4rem;
  line-height: 1.5;
  color: rgba(0, 0, 0, 0.6);
}

.cs-thread__label a {
  font-weight: 700;
  color: #000000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.2);
}

.cs-thread__label a:hover, .cs-thread__label a:focus {
  color: #1d28a1;
  border-color: #1d28a1;
}

.cs-thread__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 3.4rem;
}

.cs-thread__item {
  display: block;
  flex: 0 0 13.2rem;
  margin: 0;
  padding: 0;
}

.cs-thread__item > a, .cs-thread__item > span {
  display: grid;
  gap: .2rem;
}

.cs-thread__thumb {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 3px;
  background: #e0e0e0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.16);
}

.cs-thread__thumb img,
.entry__main .cs-thread__thumb img { /* beats the template's full-bleed article image margins */
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  margin: 0;
  object-fit: cover;
}

.cs-thread__name {
  margin-top: .6rem;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  color: #000000;
}

.cs-thread__year {
  font-size: 1.2rem;
  line-height: 1.35;
  color: rgba(0, 0, 0, 0.55);
}

.cs-thread__item > a:hover .cs-thread__name, .cs-thread__item > a:focus .cs-thread__name {
  color: #1d28a1;
}

.cs-thread__item.is-here .cs-thread__thumb {
  box-shadow: 0 0 0 3px #f2a900, 0 0 14px rgba(242, 169, 0, 0.45);
}

.cs-thread__item.is-here .cs-thread__year {
  font-weight: 700;
  color: #93501f;
}

@media only screen and (max-width:600px) {
  .cs-thread__list {
    gap: 1.8rem 2.6rem;
  }
  .cs-thread__item {
    flex-basis: 11rem;
  }
}

/* long file and signal names in running text wrap instead of widening the page on phones */
.entry__main p code, .entry__main li code, .entry__main td code {
  white-space: normal;
  overflow-wrap: anywhere;
}


/* ===================================================================
 * # the L.W. mark
 *
 * The letter L printed on an IC package, with copper pins, a notch and the
 * pin-1 dot (images/mark.svg; favicon.svg is the same chip for the browser
 * tab).
 * On desktop it is the menu's Home item; on phones, where the menu folds
 * into its button, it sits in the header with the name; and it signs the
 * footer.
 *
 * ------------------------------------------------------------------- */

.header__nav > li.header__home > a {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  vertical-align: middle;
}

.header__home img {
  display: block;
  width: auto;
  height: 30px;
  transition: transform 0.2s ease-in-out;
}

.header__home a:hover img, .header__home a:focus img {
  transform: translateY(-1px);
}

.header__logo--mark {
  display: none;
}

.header__logo.header__logo--mark a {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: "Nunito Sans", sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .25rem;
  text-transform: uppercase;
  white-space: nowrap;
  color: #000000;
}

.header__logo.header__logo--mark img {
  display: block;
  width: auto;
  height: 30px;
}

.s-footer__mark {
  display: block;
  width: auto;
  height: 48px;
  margin: 0 0 1.8rem;
}

/* desktop: the mark alone stands for Home; the word stays for screen readers */
@media only screen and (min-width:901px) {
  .header__home span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }
}

/* phones and tablets: the menu folds away, so the header carries the mark and the name */
@media only screen and (max-width:900px) {
  .header__logo--mark {
    display: inline-block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header__home img {
    transition: none;
  }
  .header__home a:hover img, .header__home a:focus img {
    transform: none;
  }
}