/* ==========================================================================
   Case template: write-up
   One reading column beside a sticky rail with the case facts and a page
   index. Every case page uses it (see case_page()); widgets of a single
   case stay in case-<slug>.css. From 960px down the rail goes and the facts
   move under the lead.
   ========================================================================== */

/* ---- Layout ------------------------------------------------------------- */

.writeup {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.writeup__main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}

.writeup__rail {
  position: sticky;
  top: 20px;
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding-top: 44px;
}

.writeup__head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.writeup__head .facts {
  display: none;
}

.writeup__title {
  font-size: var(--fs-h1-writeup);
  font-weight: var(--fw-semibold);
  line-height: 1.05;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.case__kicker + .writeup__title {
  margin-top: -4px;
}

.writeup__lead {
  color: var(--color-text-3);
  font-size: var(--fs-lead-case);
  line-height: 1.6;
  text-wrap: pretty;
}

/* ---- Facts and index ---------------------------------------------------- */

.writeup__index {
  display: flex;
  flex-direction: column;
  padding-top: 8px;
  border-top: 1px solid var(--color-ink);
}

.writeup__index a {
  padding: 6px 0;
  color: var(--color-text-5);
  font-size: var(--fs-sm);
  line-height: 1.35;
  transition: var(--transition-ui);
}

.writeup__index a:hover,
.writeup__index a[aria-current] {
  color: var(--color-ink);
}

.writeup__index a[aria-current] {
  font-weight: var(--fw-semibold);
}

/* ---- Opener: scroll video or hero screenshot ----------------------------- */

.writeup__opener {
  position: relative;
  aspect-ratio: 5 / 3;
  overflow: hidden;
  margin-top: 28px;
  border-radius: var(--radius-shot);
  background: var(--color-fill);
}

.writeup__opener img,
.writeup__opener video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.video-toggle {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: rgb(22 22 21 / 0.82);
  color: var(--color-surface);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  transition: var(--transition-ui);
}

.video-toggle:hover {
  background: var(--color-ink);
}

.video-toggle svg {
  fill: currentColor;
}

html:not(.js) .video-toggle {
  display: none;
}

/* Placeholder until real screenshots exist. */
.writeup .shot {
  aspect-ratio: 5 / 3;
  margin-top: 28px;
}

/* ---- Figures ------------------------------------------------------------ */

.figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 28px;
  padding: 32px 0 36px;
}

.figure {
  min-width: 0;
}

.figure__value {
  font-size: clamp(30px, 3.4vw, 40px);
  white-space: nowrap;
  font-weight: var(--fw-semibold);
  line-height: 1.1;
  letter-spacing: var(--tracking-tight);
  font-variant-numeric: tabular-nums;
}

.figure__label {
  margin-top: 8px;
  color: var(--color-text-3);
  font-size: var(--fs-sm);
  line-height: 1.45;
  text-wrap: pretty;
}

.figures__source {
  grid-column: 1 / -1;
  color: var(--color-text-5);
  font-size: var(--fs-xs);
}

/* ---- Sections ----------------------------------------------------------- */

.writeup__section {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
  scroll-margin-top: 8px;
}

.writeup__label {
  font-size: var(--fs-section);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-wrap: balance;
}

.writeup__sublabel {
  margin-top: 10px;
  font-size: var(--fs-point);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.015em;
}

.demo-intro {
  margin-top: -10px;
  color: var(--color-text-3);
  font-size: var(--fs-body);
  line-height: 1.6;
  text-wrap: pretty;
}

.writeup__section .point:first-child {
  padding-top: 0;
  border-top: 0;
}

.build__lead {
  color: var(--color-text-2);
  font-size: var(--fs-point);
  line-height: 1.6;
  text-wrap: pretty;
}

.build__lead strong {
  color: var(--color-ink);
}

.build__lead code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--color-fill);
  font: 0.9em/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.writeup__note {
  color: var(--color-text-5);
  font-size: var(--fs-xs);
  line-height: 1.5;
  text-wrap: pretty;
}

/* ---- Screens ------------------------------------------------------------ */

.screens {
  display: grid;
  gap: 18px 14px;
}

.screens--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.screens--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* An odd count would leave one screen alone: lead with it instead. */
.screens--2 .screen:first-child:nth-last-child(odd) {
  grid-column: 1 / -1;
}

.screen {
  min-width: 0;
}

.screen a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-thumb);
  background: var(--color-surface);
  transition: border-color var(--duration) var(--ease-out);
}

.screen a:hover {
  border-color: var(--color-ink);
}

.screen img {
  display: block;
  width: 100%;
  height: auto;
}

.screen figcaption {
  margin-top: 8px;
  color: var(--color-text-5);
  font-size: var(--fs-xs);
}

.phones {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 24px 16px;
  border-radius: var(--radius-shot);
  background: var(--color-fill);
}

.phone {
  overflow: hidden;
  width: min(170px, 42%);
  border: 6px solid var(--color-ink);
  border-radius: 28px;
  background: var(--color-surface);
}

/* Show the top of each phone screen. */
.phone img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

/* ---- Screen switch (before/after, difficulty levels) -------------------- */

.browser {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-shot);
  background: var(--color-surface);
}

.browser__bar {
  display: flex;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg);
}

.browser__bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-dot-off);
}

.browser img {
  display: block;
  width: 100%;
  height: auto;
}

.shot-switch {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.shot-switch__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

html:not(.js) .shot-switch__buttons {
  display: none;
}

.gallery__tab {
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-text-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  transition: var(--transition-ui);
}

.gallery__tab:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.gallery__tab[aria-pressed="true"] {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-surface);
}

.shot-switch__stack {
  display: grid;
}

.shot-switch__img {
  grid-area: 1 / 1;
  transition: opacity 0.45s var(--ease-out);
}

.js .shot-switch__img:not(.is-active) {
  opacity: 0;
  visibility: hidden;
}

/* Without JS every screen shows, one below the other. */
html:not(.js) .shot-switch__img {
  grid-area: auto;
}

html:not(.js) .shot-switch__stack {
  gap: 12px;
}

/* ---- Steps, branches and code ------------------------------------------- */

.flow {
  display: flex;
  flex-direction: column;
}

.flow__step {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding: 13px 0;
  border-top: 1px solid var(--color-line);
  color: var(--color-text-3);
  font-size: var(--fs-body);
  line-height: 1.55;
}

.flow__step strong {
  color: var(--color-ink);
  font-weight: var(--fw-semibold);
}

.flow__n {
  padding-top: 2px;
  color: var(--color-text-6);
  font-size: var(--fs-sm);
}

.flow code {
  font: 0.92em/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.flow__branches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.flow__branch {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  font-size: var(--fs-ui);
}

.code {
  overflow-x: auto;
  padding: 20px 22px;
  border-radius: var(--radius-shot);
  background: var(--color-ink);
  color: #f4f3ee;
  font: 13px/1.65 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  tab-size: 4;
}

.code:focus-visible {
  outline-offset: 3px;
}

.code__c {
  color: #b9b8b0;
}

/* ---- Section library ---------------------------------------------------- */

.library {
  display: flex;
  flex-direction: column;
}

.library__group {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 8px 24px;
  padding: 16px 0;
  border-top: 1px solid var(--color-line);
}

.library__group dt {
  padding-top: 5px;
  font-size: var(--fs-ui);
  font-weight: var(--fw-semibold);
}

.library__group dt span {
  margin-left: 6px;
  color: var(--color-text-5);
  font-weight: var(--fw-regular);
  font-variant-numeric: tabular-nums;
}

/* ---- What the agent caught ---------------------------------------------- */

.finds {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.find {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.find--stop {
  border-color: var(--color-accent);
}

.find__title {
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.find__text {
  margin-top: 6px;
  color: var(--color-text-3);
  font-size: var(--fs-sm);
  line-height: 1.55;
  text-wrap: pretty;
}

/* ---- Feedback triage ---------------------------------------------------- */

.triage-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.triage-wrap:focus-visible {
  outline-offset: 3px;
}

.triage {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  line-height: 1.5;
}

.triage th,
.triage td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
}

.triage th {
  color: var(--color-text-4);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  border-bottom: 1px solid var(--color-line-strong);
}

.triage td {
  color: var(--color-text-2);
}

.triage tbody tr + tr td {
  border-top: 1px solid var(--color-line);
}

.triage td:last-child,
.triage th:last-child {
  width: 1%;
  text-align: center;
}

/* Narrow screens: each row becomes a card, label top right, so no
   column hides behind a sideways scroll. */
@media (max-width: 599px) {
  .triage {
    min-width: 0;
  }

  .triage thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .triage tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
    padding: 14px 16px;
  }

  .triage tbody tr + tr {
    border-top: 1px solid var(--color-line);
  }

  .triage td {
    padding: 0;
  }

  .triage tbody tr + tr td {
    border-top: 0;
  }

  .triage td:first-child {
    color: var(--color-ink);
    font-weight: var(--fw-medium);
  }

  .triage td:nth-child(2) {
    grid-column: 1;
    grid-row: 2;
    color: var(--color-text-3);
  }

  .triage td:last-child {
    grid-column: 2;
    grid-row: 1 / span 2;
    width: auto;
  }
}

.tag-ab {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
}

.tag-ab--a {
  background: var(--color-ink);
  color: var(--color-surface);
}

.tag-ab--b {
  background: var(--color-fill);
  color: var(--color-ink);
}

.tag-ab--c {
  border: 1px dashed var(--color-ink);
  color: var(--color-ink);
}

/* ---- Closing quote ------------------------------------------------------ */

.quote {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.quote__text {
  margin: 0;
  font-size: clamp(24px, 2.4vw, 28px);
  font-weight: var(--fw-semibold);
  line-height: 1.2;
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

.quote__by {
  margin-top: 14px;
  color: var(--color-text-5);
  font-size: var(--fs-sm);
  line-height: 1.5;
}

.quote__name {
  color: var(--color-ink);
  font-weight: var(--fw-semibold);
}

/* ---- Next case with an image -------------------------------------------- */

.writeup .next-case {
  flex-wrap: nowrap;
  gap: 28px;
  margin-top: 0;
}

.next-case__thumb {
  flex: none;
  width: 240px;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-thumb);
}

/* ---- One column --------------------------------------------------------- */

@media (max-width: 959px) {
  .writeup {
    display: block;
  }

  .writeup__rail {
    display: none;
  }

  .writeup__head .facts {
    display: block;
  }
}

@media (max-width: 639px) {
  .screens--2,
  .screens--3,
  .finds,
  .flow__branches,
  .library__group {
    grid-template-columns: minmax(0, 1fr);
  }

  .figure__label {
    font-size: var(--fs-xs);
  }

  .writeup__section {
    gap: 14px;
    padding: 32px 0;
  }

  .build__lead {
    font-size: var(--fs-body);
  }

  .phones {
    gap: 12px;
    padding: 20px 12px;
  }

  .phone {
    border-width: 4px;
    border-radius: 20px;
  }

  .writeup .next-case {
    flex-direction: column-reverse;
    align-items: stretch;
    gap: 14px;
  }

  .next-case__thumb {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .shot-switch__img {
    transition: none;
  }
}