/* ==========================================================================
   UpSynQ — Our Work (casebook)
   Requires foundation.css + home.css. No page script: all case content is
   in the HTML.
   ========================================================================== */

/* 1 · Hero + casebook index */
.wk-hero { padding: clamp(28px, 4.5vw, 64px) 0 clamp(48px, 6vw, 80px); }
.wk-hero__title { font-size: clamp(2.5rem, 1.3rem + 3.6vw, 4.6rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.02; max-width: 16ch; }
.wk-hero__row { margin-top: 28px; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(20px, 4vw, 64px); align-items: end; }
.wk-hero__row .hero__lede { margin: 0; }
.wk-hero__row .hero__ctas { margin: 0; justify-content: flex-end; }

.casebook { margin-top: clamp(40px, 5vw, 64px); }
.casebook__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 2px solid var(--ink); }
.casebook__list li + li { border-left: 1px solid var(--rule); }
.casebook__list a { display: grid; gap: 10px; align-content: start; height: 100%; padding: 18px 20px 22px; text-decoration: none; color: var(--ink); transition: background .2s; }
.casebook__list li:first-child a { padding-left: 0; }
.casebook__list a:hover { background: var(--cream-warm); }
.casebook__list a:hover .casebook__t { color: var(--terracotta); }
.casebook__n { font-family: var(--font-display); font-weight: 800; font-size: 2.1rem; letter-spacing: -0.03em; line-height: 1; color: var(--terracotta); }
.casebook__status { display: flex; flex-wrap: wrap; gap: 6px; }
.casebook__sector { font-family: var(--font-mono); font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.casebook__t { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; line-height: 1.3; letter-spacing: -0.01em; transition: color .2s; }

@media (max-width: 960px) {
  .wk-hero__row { grid-template-columns: 1fr; align-items: start; }
  .wk-hero__row .hero__ctas { justify-content: flex-start; }
  .casebook__list { grid-template-columns: 1fr 1fr; }
  .casebook__list li:nth-child(3) { border-left: 0; }
  .casebook__list li:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .casebook__list li:nth-child(3) a { padding-left: 0; }
}
@media (max-width: 560px) {
  .casebook__list { grid-template-columns: 1fr; }
  .casebook__list li + li { border-left: 0; border-top: 1px solid var(--rule); }
  .casebook__list a, .casebook__list li:first-child a, .casebook__list li:nth-child(3) a { padding: 16px 0; grid-template-columns: 52px 1fr; column-gap: 12px; }
  .casebook__n { grid-row: 1 / span 3; font-size: 1.7rem; }
  .wk-hero .hero__ctas .btn { flex: 1 1 100%; }
}

/* Case studies */
.case-study { padding: clamp(64px, 8vw, 112px) 0; border-top: 1px solid var(--rule); }
.case-study--ink { background: var(--ink); color: var(--cream); border-top-color: var(--ink); }
.case-study--warm { background: var(--cream-warm); }
.case-study--ink + .case-study { border-top-color: transparent; }

.cs-head { display: grid; grid-template-columns: clamp(80px, 11vw, 150px) minmax(0, 1fr); gap: clamp(16px, 3vw, 40px); align-items: start; }
.cs-head__n { font-family: var(--font-display); font-weight: 800; font-size: clamp(3.6rem, 2rem + 5vw, 7.5rem); line-height: .85; letter-spacing: -0.05em; color: var(--terracotta); }
.case-study--ink .cs-head__n { color: var(--terracotta-light); }
.cs-head__sector { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; font-family: var(--font-mono); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.case-study--ink .cs-head__sector { color: var(--on-ink-soft); }
.cs-head__title { margin-top: 14px; font-size: clamp(1.9rem, 1.2rem + 2.2vw, 3.1rem); letter-spacing: -0.03em; line-height: 1.08; max-width: 22ch; }
.cs-head__dek { margin-top: 18px; font-size: var(--fs-lede); line-height: 1.55; color: var(--ink-mid); max-width: 760px; }
.case-study--ink .cs-head__dek { color: var(--on-ink-soft); }

.cs-meta { margin: clamp(28px, 4vw, 44px) 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule); }
.case-study--ink .cs-meta { border-top-color: var(--ink-line); border-bottom-color: var(--ink-line); }
.cs-meta div { padding: 14px 18px 14px 0; }
.cs-meta div + div { padding-left: 18px; border-left: 1px solid var(--rule); }
.case-study--ink .cs-meta div + div { border-left-color: var(--ink-line); }
.cs-meta dt { font-family: var(--font-mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
.case-study--ink .cs-meta dt { color: var(--on-ink-soft); }
.cs-meta dd { margin: 4px 0 0; font-size: .92rem; font-weight: 600; line-height: 1.45; }

.cs-body { margin-top: clamp(32px, 4vw, 52px); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.cs-body--flip > .cs-side { order: -1; }
.cs-prose { display: grid; gap: 14px; }
.cs-prose h3 { font-size: 1.2rem; letter-spacing: -0.015em; margin-top: 10px; }
.cs-prose h3:first-child { margin-top: 0; }
.cs-prose p { line-height: 1.65; color: var(--ink-mid); }
.case-study--ink .cs-prose p { color: var(--on-ink-soft); }
.cs-list, .cs-protocol { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.cs-list li { padding-left: 16px; border-left: 2px solid var(--terracotta); line-height: 1.55; color: var(--ink-mid); }
.cs-list b, .cs-protocol b { color: var(--ink); }
.cs-protocol { counter-reset: pr; }
.cs-protocol li { counter-increment: pr; position: relative; padding-left: 40px; line-height: 1.55; color: var(--ink-mid); }
.cs-protocol li::before { content: counter(pr, decimal-leading-zero); position: absolute; left: 0; top: 1px; width: 28px; height: 22px; display: grid; place-items: center; border: 1px solid var(--ink); font-family: var(--font-mono); font-size: .66rem; color: var(--ink); background: var(--cream); }
.cs-protocol li:last-child::before { background: var(--terracotta); border-color: var(--terracotta); color: var(--cream); }
.cs-link { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 6px; }
.cs-side { display: grid; gap: 16px; }

.cs-proof { padding: 18px 20px; border-left: 3px solid var(--terracotta); background: #fff; display: grid; gap: 6px; }
.case-study--ink .cs-proof { background: var(--ink-raised); border-left-color: var(--terracotta-light); }
.cs-proof__v { font-family: var(--font-display); font-weight: 800; font-size: clamp(2.2rem, 1.6rem + 1.8vw, 3.2rem); letter-spacing: -0.03em; line-height: 1; }
.cs-proof__v span { font-size: .42em; font-weight: 600; color: var(--ink-soft); margin-left: 4px; }
.cs-proof__d { font-size: .92rem; line-height: 1.5; color: var(--ink-mid); }
.case-study--ink .cs-proof__d { color: var(--on-ink-soft); }
.cs-proof--quiet .cs-proof__v { font-size: clamp(1.6rem, 1.3rem + 1vw, 2.2rem); }

/* Case 01 — decision trail */
.trail { margin: 0; padding: 20px; background: #fff; border: 1px solid var(--ink); }
.trail__h { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-family: var(--font-mono); font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 14px; }
.trail__steps { list-style: none; margin: 0; padding: 0; position: relative; }
.trail__steps::before { content: ''; position: absolute; left: 6px; top: 10px; bottom: 26px; width: 1.5px; background: var(--ink); }
.trail__steps li { position: relative; padding: 0 0 16px 28px; display: grid; gap: 2px; }
.trail__steps li::before { content: ''; position: absolute; left: 0; top: 5px; width: 13px; height: 13px; background: var(--cream); border: 1.5px solid var(--ink); }
.trail__steps li.is-end::before { background: var(--terracotta); border-color: var(--terracotta); border-radius: 50%; }
.trail__steps b { font-size: .95rem; }
.trail__steps span { font-family: var(--font-mono); font-size: .78rem; line-height: 1.5; color: var(--ink-mid); }
.trail figcaption { margin-top: 4px; font-size: .82rem; color: var(--ink-soft); line-height: 1.5; }

/* Case 02 — day flow */
.dayflow { margin: 0; padding: 16px; border: 1px solid var(--ink-line); }
.dayflow__svg { width: 100%; height: auto; }
.dayflow__area { fill: var(--ink-raised); }
.dayflow__line { fill: none; stroke: var(--cream); stroke-width: 2; }
.dayflow__corr { stroke: var(--terracotta-light); stroke-width: 1; stroke-dasharray: 4 4; }
.dayflow__steps { list-style: none; margin: 12px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
.dayflow__steps li { padding: 8px 8px 0 0; border-top: 2px solid var(--ink-line); font-size: .8rem; color: var(--on-ink-soft); }
.dayflow__steps li + li { padding-left: 8px; }
.dayflow__steps .is-end { border-top-color: var(--terracotta-light); color: var(--cream); }
.dayflow figcaption { margin-top: 10px; font-size: .8rem; color: var(--on-ink-soft); }
.dayflow .illustrative { color: var(--on-ink-soft); margin-right: 6px; }

/* Case 03 — censored demand + hierarchy */
.censor { margin: 0; padding: 18px; background: #fff; border: 1px solid var(--rule); }
.censor__t { width: 100%; border-collapse: collapse; font-size: .86rem; }
.censor__t th, .censor__t td { padding: 8px 6px; border-bottom: 1px solid var(--rule-soft); text-align: right; }
.censor__t th[scope="row"], .censor__t thead th:first-child { text-align: left; font-weight: 500; }
.censor__t thead th { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.censor__t td { font-family: var(--font-mono); }
.censor__t .is-zero { color: var(--terracotta); font-weight: 700; }
.censor__t .is-fix th, .censor__t .is-fix td { border-top: 1px solid var(--ink); font-weight: 700; }
.censor figcaption { margin-top: 10px; font-size: .84rem; color: var(--ink-soft); }
.hier { margin: 0; display: grid; gap: 6px; }
.hier__lvl { display: flex; justify-content: space-between; gap: 12px; padding: 10px 14px; border: 1px solid var(--rule); background: #fff; font-size: .9rem; }
.hier__lvl:nth-child(2) { margin-left: 18px; } .hier__lvl:nth-child(3) { margin-left: 36px; }
.hier__lvl span { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-soft); text-align: right; }
.hier__lvl.is-key { border-color: var(--terracotta); box-shadow: inset 3px 0 0 var(--terracotta); }

/* Case 04 — rulers + code continuity */
.rulers { margin: 0; padding: 20px; background: var(--cream-warm); border: 1px solid var(--rule); }
.rulers__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.rulers__list li { display: grid; grid-template-columns: minmax(0, 1fr) 54px; grid-template-areas: "label val" "bar bar" "base base"; gap: 4px 10px; align-items: baseline; }
.rulers__list span { grid-area: label; font-size: .86rem; color: var(--ink-mid); }
.rulers__list b { grid-area: val; font-family: var(--font-mono); font-size: .95rem; text-align: right; }
.rulers__list i { grid-area: bar; height: 10px; background: linear-gradient(90deg, var(--ink) 0 calc((var(--v) - 50) * 2%), var(--cream-deep) calc((var(--v) - 50) * 2%)); }
.rulers__list .is-key i { background: linear-gradient(90deg, var(--terracotta) 0 calc((var(--v) - 50) * 2%), var(--cream-deep) calc((var(--v) - 50) * 2%)); }
.rulers__list em { grid-area: base; font-style: normal; font-family: var(--font-mono); font-size: .72rem; color: var(--ink-soft); }
.rulers figcaption { margin-top: 14px; font-size: .82rem; line-height: 1.5; color: var(--ink-soft); }
.codes { margin: 0; padding: 18px; background: #fff; border: 1px solid var(--rule); }
.codes__svg { width: 100%; height: auto; }
.codes__old { fill: none; stroke: var(--ink-soft); stroke-width: 2.2; stroke-dasharray: 5 4; }
.codes__new { fill: none; stroke: var(--terracotta); stroke-width: 2.2; }
.codes__sum { fill: none; stroke: var(--ink); stroke-width: 1.4; }
.codes__t { font-family: var(--font-mono); font-size: 8px; fill: var(--ink-soft); }
.codes figcaption { margin-top: 8px; font-size: .82rem; color: var(--ink-soft); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.k-old, .k-new { display: inline-block; width: 16px; height: 0; border-top: 2px dashed var(--ink-soft); }
.k-new { border-top: 2px solid var(--terracotta); margin-left: 8px; }

@media (max-width: 960px) {
  .cs-body { grid-template-columns: minmax(0, 1fr); }
  .cs-body--flip > .cs-side { order: 0; }
}
@media (max-width: 720px) {
  .cs-head { grid-template-columns: 1fr; gap: 6px; }
  .cs-meta { grid-template-columns: 1fr; }
  .cs-meta div, .cs-meta div + div { padding: 10px 0; border-left: 0; }
  .cs-meta div + div { border-top: 1px solid var(--rule); }
  .case-study--ink .cs-meta div + div { border-top-color: var(--ink-line); }
  .dayflow__steps { grid-template-columns: 1fr 1fr; gap: 8px 0; }
  .dayflow__steps li:nth-child(3) { padding-left: 0; }
  .hier__lvl:nth-child(2) { margin-left: 10px; } .hier__lvl:nth-child(3) { margin-left: 20px; }
  .hier__lvl { flex-direction: column; gap: 2px; }
  .censor { padding: 14px 10px; }
  .censor__t { font-size: .76rem; }
  .censor__t th, .censor__t td { padding: 6px 3px; }
  .censor__t thead th { font-size: .56rem; }
  .hier__lvl span { text-align: left; }
}

/* 7 · Synthesis */
.rep { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink-line); }
.rep__col { padding: 22px 24px 22px 0; display: grid; gap: 12px; align-content: start; }
.rep__col + .rep__col { padding-left: 24px; border-left: 1px solid var(--ink-line); }
.rep__k { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--on-ink-soft); }
.rep__col--diff .rep__k { color: var(--terracotta-light); }
.rep ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.rep li { font-size: .95rem; line-height: 1.5; padding-left: 12px; border-left: 1px solid var(--ink-line); color: var(--cream); }
.rep__col--diff li { border-left-color: var(--terracotta-light); color: var(--on-ink-soft); }
.rep__col--diff b { color: var(--cream); }
.rep p { color: var(--on-ink-soft); line-height: 1.6; }
@media (max-width: 860px) {
  .rep { grid-template-columns: 1fr; }
  .rep__col, .rep__col + .rep__col { padding: 20px 0; border-left: 0; }
  .rep__col + .rep__col { border-top: 1px solid var(--ink-line); }
}

/* 8 · Also applied */
.wk-next { padding: clamp(40px, 5vw, 64px) 0; }
.wk-next .wrap { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: baseline; }
.wk-next__h { font-family: var(--font-mono); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.wk-next__p { font-size: 1.02rem; color: var(--ink-mid); max-width: 720px; }
@media (max-width: 720px) { .wk-next .wrap { grid-template-columns: 1fr; gap: 8px; } }

/* 9 · CTA */
.wk-cta { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: end; }
.wk-cta h2 { font-size: var(--fs-h2); }
.wk-cta .lede { margin-top: 18px; }
.wk-cta__actions { display: grid; gap: 16px; justify-items: start; }
@media (max-width: 860px) { .wk-cta { grid-template-columns: 1fr; align-items: start; } }
@media (max-width: 480px) { .wk-cta__actions .btn { width: 100%; } }