/* HOMNOX — case studies.
   Built on the main site's styles.css (tokens, type, header, footer, buttons).
   This file adds only the editorial components a long-form, interactive
   research page needs. The same rules as the site: the four-colour palette,
   square corners, no shadows, no blur, hairlines only where they carry
   meaning. Loaded after ../styles.css. */

/* ── Page shell ───────────────────────────────────────────────────────── */

.cs {
  background: var(--white);
  color: var(--black);
}

.cs-wrap {
  width: var(--shell);
  margin-inline: auto;
}

/* ── Cover ────────────────────────────────────────────────────────────── */

.cs-cover {
  position: relative;
  background: var(--black);
  color: var(--white);
  padding: calc(var(--hdr) + var(--row) * 1.9) 0 calc(var(--row) * 1.5);
  overflow: clip;
}

.cs-cover .cs-wrap {
  display: grid;
  gap: calc(var(--row) * .45);
  max-width: 66rem;
}

.cs-cover h1 {
  font-size: clamp(2.25rem, 3vw + 1rem, 4.25rem);
  max-width: 22ch;
}

.cs-cover .cs-lead {
  max-width: 58ch;
  color: rgba(255, 255, 255, .72);
  font-size: var(--fs-lead);
  line-height: var(--lh-lead);
}

.cs-cover .cs-kicker {
  color: var(--silver);
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .55);
}

.cs-meta b {
  color: var(--white);
  font-weight: 400;
}

/* ── Bands and sections ───────────────────────────────────────────────── */

.cs-band {
  padding: calc(var(--row) * 1.4) 0;
}

.cs-band--tight {
  padding: calc(var(--row) * .85) 0;
}

.cs-band--dark {
  background: var(--black);
  color: var(--white);
  --ink: var(--white);
  --ink-2: rgba(255, 255, 255, .68);
  --rule: rgba(255, 255, 255, .16);
}

.cs-band--wash {
  background: rgba(10, 10, 10, .03);
}

.cs-stack {
  display: grid;
  gap: calc(var(--row) * .75);
}

.cs-stack--tight {
  display: grid;
  gap: calc(var(--row) * .45);
}

.cs-head {
  display: grid;
  gap: .75rem;
  max-width: 64ch;
}

.cs-head--center {
  justify-items: center;
  text-align: center;
}

.cs-kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  line-height: 1.4;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--green);
}

.cs-band--dark .cs-kicker {
  /* green fails 4.5:1 on black at this size */
  color: var(--silver);
}

.cs-h2 {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  letter-spacing: -.015em;
}

.cs-h3 {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  line-height: 1.3;
}

.cs-lead {
  max-width: 66ch;
  color: var(--ink-2, rgba(10, 10, 10, .62));
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

.cs-body {
  max-width: 72ch;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

.cs-body strong,
.cs-lead strong {
  color: inherit;
  font-weight: 600;
}

/* ── Grids ────────────────────────────────────────────────────────────── */

.cs-grid {
  display: grid;
  gap: var(--gut);
}

.cs-grid--2,
.cs-grid--3 {
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 900px) {
  .cs-grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .cs-grid--sidebar {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: calc(var(--row) * .9) var(--gut);
    align-items: start;
  }
}

/* ── Cards, stats, pills ──────────────────────────────────────────────── */

.cs-card {
  display: grid;
  align-content: start;
  gap: .6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule, rgba(10, 10, 10, .16));
}

.cs-card--pad {
  padding: 1.25rem 0 1.5rem;
}

/* Market selectors are buttons: left-aligned, with the hairline as the only
   affordance. */
button.cs-card {
  text-align: left;
  cursor: pointer;
  transition: border-color .18s linear;
}

button.cs-card:hover,
button.cs-card:focus-visible {
  border-top-color: var(--green);
}

button.cs-card[aria-pressed="true"] {
  border-top-color: var(--green);
}

.cs-stat {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 2.4vw + .8rem, 3rem);
  line-height: 1.05;
  letter-spacing: -.02em;
}

.cs-stat--sm {
  font-size: clamp(1.4rem, 1.2vw + .9rem, 2rem);
}

.cs-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

.cs-small {
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

.cs-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-height: 1.75rem;
  padding: .2rem .6rem;
  border: 1px solid var(--rule, rgba(10, 10, 10, .2));
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  line-height: 1;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-2, rgba(10, 10, 10, .62));
  white-space: nowrap;
}

.cs-pill--green {
  border-color: rgba(15, 116, 76, .4);
  color: var(--green);
}

.cs-band--dark .cs-pill {
  border-color: rgba(255, 255, 255, .2);
  color: rgba(255, 255, 255, .72);
}

.cs-band--dark .cs-pill--green {
  border-color: rgba(192, 192, 192, .35);
  color: var(--silver);
}

.cs-pills {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.cs-mark {
  color: var(--green);
  font-family: var(--font-mono);
}

.cs-band--dark .cs-mark {
  color: var(--silver);
}

/* ── Tabs ─────────────────────────────────────────────────────────────── */

.cs-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
  border-bottom: 1px solid var(--rule, rgba(10, 10, 10, .16));
}

.cs-tab {
  position: relative;
  padding: .9rem 0 .85rem;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-2, rgba(10, 10, 10, .62));
  cursor: pointer;
  transition: color .18s linear;
}

.cs-tab:hover {
  color: var(--ink, currentColor);
}

.cs-tab[aria-selected="true"],
.cs-tab.is-active {
  color: var(--ink, currentColor);
  border-bottom-color: var(--green);
}

.cs-panel[hidden] {
  display: none;
}

/* ── Charts ───────────────────────────────────────────────────────────── */

.cs-chart {
  position: relative;
  width: 100%;
  height: clamp(260px, 32vh, 380px);
  padding: 1rem;
  border: 1px solid var(--rule, rgba(10, 10, 10, .16));
  /* A chart is a reading surface: keep it on white even inside a dark band,
     so the mono labels and the plot stay legible. */
  background: var(--white);
}

.cs-chart--tall {
  height: clamp(320px, 40vh, 460px);
}

.cs-chart canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.cs-chart-note {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

/* ── Tables ───────────────────────────────────────────────────────────── */

.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
  line-height: 1.5;
}

.cs-table th,
.cs-table td {
  padding: .7rem .9rem .7rem 0;
  border-bottom: 1px solid var(--rule, rgba(10, 10, 10, .16));
  text-align: left;
  vertical-align: top;
}

.cs-table th {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

.cs-table td.num,
.cs-table th.num {
  font-family: var(--font-mono);
  white-space: nowrap;
}

.cs-table tr:last-child td {
  border-bottom: 0;
}

.cs-scroll {
  overflow-x: auto;
}

/* ── Steps / process ──────────────────────────────────────────────────── */

.cs-steps {
  display: grid;
  counter-reset: cs-step;
  border-top: 1px solid var(--rule, rgba(10, 10, 10, .16));
}

.cs-steps > li {
  position: relative;
  display: grid;
  gap: .3rem;
  padding: 1rem 0 1rem 3rem;
  border-bottom: 1px solid var(--rule, rgba(10, 10, 10, .16));
  counter-increment: cs-step;
}

.cs-steps > li::before {
  content: counter(cs-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .14em;
  color: var(--green);
}

.cs-band--dark .cs-steps > li::before {
  color: var(--silver);
}

.cs-steps p {
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

/* ── Notes, quotes, disclosure ────────────────────────────────────────── */

.cs-note {
  max-width: 72ch;
  padding: .9rem 0 .9rem 1.25rem;
  border-left: 2px solid var(--green);
  color: var(--ink-2, rgba(10, 10, 10, .62));
  font-size: var(--fs-small);
  line-height: 1.6;
}

.cs-quote {
  max-width: 34ch;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 1.9vw + .6rem, 2.5rem);
  line-height: 1.2;
  letter-spacing: -.015em;
}

.cs-disclosure {
  border-top: 1px solid var(--rule, rgba(10, 10, 10, .16));
  padding-top: 1.25rem;
  max-width: 82ch;
  font-size: .75rem;
  line-height: 1.6;
  color: var(--ink-2, rgba(10, 10, 10, .62));
}

/* ── Case-study index ─────────────────────────────────────────────────── */

.cs-cards {
  display: grid;
  border-top: 1px solid var(--rule, rgba(10, 10, 10, .16));
}

.cs-card-link {
  display: grid;
  gap: .55rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule, rgba(10, 10, 10, .16));
}

.cs-card-link .cs-h3 {
  max-width: 28ch;
}

.cs-card-link .cs-small {
  max-width: 62ch;
}

.cs-card-link .more {
  justify-self: start;
  margin-top: .35rem;
}

/* ── Narrow ───────────────────────────────────────────────────────────── */

@media (max-width: 899px) {
  .cs-tabs {
    gap: 0 1.1rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    /* The bar scrolls sideways on phones; fade the cut edge so it reads as
       "more to the right" rather than a clipped label. */
    mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 2.5rem), transparent 100%);
  }

  .cs-tabs::-webkit-scrollbar {
    display: none;
  }

  .cs-tab {
    white-space: nowrap;
  }

  .cs-chart {
    height: 280px;
    padding: .5rem;
  }
}