/* =====================================================================
   farzadrajabi.com — v6 case-study template (requires site.css first)
   Used by every /case-*.html page. A new case study reuses this file
   unchanged; only the page's HTML content differs.
   ===================================================================== */

/* ============ READING PROGRESS (phone) ============ */
.readbar{position:absolute;left:0;right:0;bottom:0;height:3px;background:transparent;display:none}
.readbar span{display:block;height:100%;width:0;background:var(--yellow);transition:width .1s linear}

/* ============ CASE HERO ============ */
.chero{padding:clamp(28px,5vw,64px) var(--gutter) clamp(48px,6vw,88px)}
.chero-grid{display:flex;flex-wrap:wrap;align-items:flex-start;gap:40px 64px}
.chero-copy{flex:1 1 560px;min-width:0}
.back{display:inline-flex;align-items:center;min-height:44px;margin:-8px 0 14px;font-weight:700;font-size:15px;color:var(--teal-dark);text-decoration:none}
.back:hover{color:var(--ink)}
.clabel{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin:0 0 18px}
.cat{display:inline-flex;align-items:center;min-height:30px;padding:0 12px;border-radius:999px;background:#E3EEF1;color:var(--ink);font-size:14px;font-weight:700}
.client{font-size:15px;font-weight:600;color:var(--ink-2)}
.ch1{margin:0;font-size:clamp(40px,5.4vw,76px);line-height:1.02;font-weight:800;letter-spacing:-.04em;max-width:16ch;animation:fadeUp .8s var(--ease-out) both}
.cdek{margin:22px 0 0;max-width:640px;font-size:clamp(17px,1.5vw,20px);line-height:1.55;color:var(--ink-2);animation:fadeUp .8s var(--ease-out) .1s both}
.cdisclaimer{margin:16px 0 0;max-width:640px;padding:12px 14px;border-radius:12px;background:#E3EEF1;font-size:14px;line-height:1.5;color:var(--ink-2)}
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:32px 0 0;padding:20px 0 0;border-top:2px solid var(--ink)}
.facts div{display:flex;flex-direction:column;gap:6px;min-width:0}
.facts dt{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.facts dd{margin:0;font-size:17px;font-weight:700;line-height:1.35}

/* Hero container: same component as the homepage grid, larger, doors open on load */
.chero-box{flex:0 1 420px;min-width:0;width:100%}
.chero-box .cbox{width:100%;height:340px;cursor:default;border-radius:18px;box-shadow:0 18px 40px rgba(19,33,43,.16)}
.chero-box .cbox .door{transition-duration:1.1s}
.chero-box .cbox.is-open{box-shadow:0 0 0 4px var(--yellow),0 18px 40px rgba(19,33,43,.18)}
.chero-box .door-l{padding:20px}
.chero-box .doorsub{font-size:14px}
.chero-box .doorlabel{font-size:34px}
.chero-box .door-bar{top:22px;bottom:22px}
.chero-box .cin{gap:10px;padding:24px}
.cin-index{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--yellow)}
.cin-metric{font-size:clamp(64px,6vw,88px);line-height:1;font-weight:800;letter-spacing:-.045em;color:#fff}
.cin-label{font-size:17px;font-weight:700;color:#fff}
.cin-sub{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:rgba(255,255,255,.72)}
.no-js .chero-box .cbox{--door:108deg}

/* ============ CASE BODY ============ */
.cbody{display:grid;grid-template-columns:220px minmax(0,760px);gap:64px;padding:0 var(--gutter) clamp(64px,8vw,112px);max-width:calc(var(--maxw) + 2 * 56px);margin:0 auto}
.toc{position:sticky;top:96px;align-self:start;display:flex;gap:16px}
.toc ol{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:4px}
.toc a{display:flex;align-items:center;gap:10px;min-height:36px;color:var(--muted);text-decoration:none;font-size:15px;font-weight:600;transition:color .25s ease}
.toc a .n{font-family:var(--mono);font-size:11px;letter-spacing:.1em}
.toc a:hover,.toc a.is-active{color:var(--ink)}
.toc a.is-active .n{color:var(--teal-dark)}
.toc-rail{position:relative;width:3px;border-radius:2px;background:#D9E2E5;order:-1}
.toc-fill{position:absolute;left:0;top:0;width:100%;height:0;border-radius:2px;background:var(--yellow)}
.cart{min-width:0}
.cs{padding:0 0 56px}
.cs + .cs{padding-top:40px;border-top:1px solid #D9E2E5}
.cs .cs-label{margin:0 0 14px;line-height:1.4;font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--teal-dark)}
.cs h2{margin:0 0 18px;font-size:clamp(28px,3vw,40px);line-height:1.1;font-weight:800;letter-spacing:-.03em}
.cs p{margin:0 0 16px;font-size:18px;line-height:1.7;color:var(--ink-2)}
.cs p:last-child{margin-bottom:0}
.clist{margin:4px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:14px}
.clist li{position:relative;padding-left:30px;font-size:18px;line-height:1.65;color:var(--ink-2)}
.clist li::before{content:"";position:absolute;left:2px;top:.62em;width:12px;height:12px;border-radius:3px;background:var(--yellow);box-shadow:0 0 0 2px var(--ink) inset}
.decisions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:6px}
.decision{background:#fff;border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:10px;box-shadow:0 1px 0 rgba(19,33,43,.06),0 12px 30px rgba(19,33,43,.06)}
.decision .n{font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--teal-dark)}
.decision h3{margin:0;font-size:20px;line-height:1.25;font-weight:800;letter-spacing:-.02em}
.decision p{margin:0;font-size:16px;line-height:1.6;color:var(--ink-3)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.takeaway{margin:8px 0 0;padding:clamp(28px,4vw,44px);border-radius:24px;background:var(--ink);color:#fff}
.takeaway-label{display:block;margin:0 0 14px;font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--yellow)}
.takeaway p{margin:0;font-size:clamp(20px,2.2vw,28px);line-height:1.4;font-weight:600;letter-spacing:-.01em}

/* Scroll reveal (enabled only when JS runs) */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.js .reveal.in{opacity:1;transform:none}

/* ============ NEXT CASE ============ */
.nextcase{background:var(--teal-band);color:#fff;padding:clamp(56px,7vw,96px) var(--gutter)}
.nextcase .eyebrow{color:var(--yellow)}
.next-link{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;color:#fff;text-decoration:none;padding:8px 0 24px;border-bottom:2px solid rgba(255,255,255,.35)}
.next-link:hover{color:#fff;border-bottom-color:var(--yellow)}
.next-title{font-size:clamp(28px,3.6vw,52px);line-height:1.08;font-weight:800;letter-spacing:-.035em;max-width:24ch}
.next-arrow{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:var(--yellow);color:var(--ink);font-size:28px;font-weight:800;transition:transform .3s var(--ease-out)}
.next-link:hover .next-arrow{transform:translateX(6px)}
.next-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:18px}
.next-meta span{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.75)}
.next-meta a{display:inline-flex;align-items:center;min-height:44px;color:#fff;font-weight:700;text-decoration:none}
.next-meta a:hover{color:var(--yellow)}

/* ============ MOBILE (<=760px) ============ */
@media (max-width:760px){
  .readbar{display:block}
  .chero-grid{gap:28px}
  .ch1{font-size:36px;max-width:none}
  .cdek{font-size:16px}
  .facts{grid-template-columns:minmax(0,1fr);gap:14px}
  .facts dd{font-size:16px}
  .chero-box{flex:1 1 100%}
  .chero-box .cbox{height:230px}
  .chero-box .doorlabel{font-size:24px}
  .chero-box .doorsub{font-size:12px}
  .chero-box .door-l{padding:14px}
  .cin-metric{font-size:56px}
  .cin-label{font-size:15px}
  .cbody{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .cs{padding-bottom:40px}
  .cs + .cs{padding-top:32px}
  .cs h2{font-size:26px}
  .cs p,.clist li{font-size:16px}
  .decisions{grid-template-columns:minmax(0,1fr);gap:12px}
  .decision{padding:20px}
  .decision h3{font-size:18px}
  .decision p{font-size:15px}
  .actions .btn{width:100%}
  .takeaway{border-radius:20px}
  .takeaway p{font-size:19px}
  .next-title{font-size:26px}
  .next-arrow{width:52px;height:52px;font-size:22px}
}