/* ============================================================================
   ELYTRA, diagram & infographic styles (Stripe/Linear/Mercury quality).
   Premium flow diagrams, comparison infographic, case-study cards & pages,
   contact. White background, light-grey connectors, subtle motion.
   Loaded in addition to site.css on pages that use these components.
   ============================================================================ */

/* ---------------- premium rail flow ---------------- */
.railflow-wrap{position:relative}
.railflow{display:flex;align-items:stretch;gap:0;overflow-x:auto;padding:8px 2px 22px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}
.railflow::-webkit-scrollbar{height:6px}
.railflow::-webkit-scrollbar-thumb{background:var(--ink-200);border-radius:999px}
.rf-node{scroll-snap-align:center;flex:0 0 auto;width:158px;background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:20px 16px;display:flex;flex-direction:column;align-items:flex-start;gap:0;box-shadow:var(--shadow-xs);transition:transform .2s var(--ease-out),box-shadow .2s var(--ease-out),border-color .2s}
.rf-node:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
.rf-ic{width:42px;height:42px;border-radius:var(--r-md);border:1px solid var(--border-strong);display:flex;align-items:center;justify-content:center;color:var(--ink-900);margin-bottom:16px;background:var(--white)}
.rf-ic [data-lucide]{width:20px;height:20px}
.rf-kind{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-400);margin-bottom:6px}
.rf-name{font:var(--t-h4);font-size:15px;line-height:1.25;letter-spacing:-.01em}
.rf-meta{font:var(--t-caption);color:var(--fg-muted);margin-top:7px;line-height:1.4}
.rf-link{flex:0 0 auto;align-self:center;width:34px;height:2px;position:relative;margin:0 -1px}
.rf-link::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,var(--ink-200) 0 5px,transparent 5px 10px)}
.rf-link::after{content:"";position:absolute;left:0;top:50%;width:8px;height:8px;border-top:2px solid var(--ink-300);border-right:2px solid var(--ink-300);transform:translate(0,-50%) rotate(45deg);right:-2px;left:auto}
@media (prefers-reduced-motion: no-preference){
  .rf-flowdot{position:absolute;top:50%;left:0;width:5px;height:5px;border-radius:50%;background:var(--ink-900);transform:translateY(-50%);animation:rfflow 2.6s var(--ease-inout) infinite}
}
@keyframes rfflow{0%{left:0;opacity:0}15%{opacity:1}85%{opacity:1}100%{left:30px;opacity:0}}
/* the climax node: USD stays in the US */
.rf-node.rf-key{background:var(--ink-950);border-color:var(--ink-950);width:188px}
.rf-node.rf-key .rf-ic{background:rgba(255,255,255,.06);border-color:var(--ink-700);color:#fff}
.rf-node.rf-key .rf-kind{color:var(--ink-500)}
.rf-node.rf-key .rf-name{color:#fff}
.rf-node.rf-key .rf-meta{color:var(--ink-400)}
.railflow-hint{display:flex;align-items:center;gap:8px;font:var(--t-caption);color:var(--ink-400);margin-top:4px}
.railflow-hint [data-lucide]{width:14px;height:14px}
@media(max-width:820px){
  .railflow{flex-direction:column;align-items:stretch;overflow-x:visible}
  .rf-node{width:auto;flex-direction:row;align-items:center;gap:16px}
  .rf-node.rf-key{width:auto}
  .rf-ic{margin-bottom:0}
  .rf-body{flex:1}
  .rf-link{width:2px;height:26px;margin:2px 0 2px 21px;align-self:flex-start}
  .rf-link::before{background:repeating-linear-gradient(180deg,var(--ink-200) 0 5px,transparent 5px 10px)}
  .rf-link::after{top:auto;bottom:-2px;left:50%;right:auto;transform:translate(-50%,0) rotate(135deg)}
  .rf-flowdot{display:none}
  .railflow-hint{display:none}
}

/* ---------------- before / after comparison infographic ---------------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch;position:relative}
.cmp-vs{position:absolute;left:50%;top:62px;transform:translate(-50%,-50%);z-index:5;width:48px;height:48px;border-radius:50%;background:var(--white);border:1px solid var(--border-strong);box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;font:var(--t-overline);letter-spacing:.06em;color:var(--ink-500)}
.cmp-col{border:1px solid var(--border);border-radius:var(--r-xl);padding:30px 28px;background:var(--white);display:flex;flex-direction:column}
.cmp-col.before{background:#FCF8F5}
.cmp-col.after{background:var(--ink-950);border-color:var(--ink-950);color:var(--paper);box-shadow:0 0 0 1.5px rgba(31,157,87,.4),0 16px 48px rgba(31,157,87,.15)}
.cmp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.cmp-tag{font:var(--t-overline);letter-spacing:var(--tracking-overline);text-transform:uppercase;color:var(--ink-500)}
.cmp-col.after .cmp-tag{color:var(--ink-400)}
.cmp-badge{font:var(--t-caption);font-weight:600;padding:5px 12px;border-radius:var(--r-pill);border:1px solid var(--border-strong);color:var(--ink-600);display:inline-flex;align-items:center;gap:6px}
.cmp-badge [data-lucide]{width:13px;height:13px}
.cmp-badge.outdated{background:rgba(199,67,53,.09);border-color:rgba(199,67,53,.32);color:#B23A2C}
.cmp-badge.recommended{background:rgba(46,196,122,.16);border-color:rgba(46,196,122,.45);color:#5FE2A0}
.cmp-col.after .cmp-badge{border-color:var(--ink-700);color:#fff}
.cmp-title{font:var(--t-h2);font-size:24px;letter-spacing:-.01em;margin:0 0 22px}
.cmp-col.after .cmp-title{color:#fff}
.cmp-flow{display:flex;flex-direction:column;gap:0;margin-bottom:24px}
.cmp-step{display:flex;align-items:center;gap:13px;padding:11px 14px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-sunken)}
.cmp-step .ci{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;background:var(--white);border:1px solid var(--border-strong);color:var(--ink-700);flex:none}
.cmp-step .ci [data-lucide]{width:15px;height:15px}
.cmp-step .cl{font:var(--t-body-sm);font-weight:600;color:var(--ink-900)}
.cmp-step.muted .cl{color:var(--ink-500);font-weight:500}
.cmp-conn{height:18px;width:2px;margin-left:28px;background:repeating-linear-gradient(180deg,var(--ink-200) 0 4px,transparent 4px 8px)}
/* after column, dark treatment */
.cmp-col.after .cmp-step{background:rgba(255,255,255,.04);border-color:var(--ink-800)}
.cmp-col.after .cmp-step .ci{background:#fff;border-color:#fff;color:#111}
.cmp-col.after .cmp-step .cl{color:#fff}
.cmp-col.after .cmp-conn{background:repeating-linear-gradient(180deg,var(--ink-700) 0 4px,transparent 4px 8px)}
.cmp-key{margin-top:auto;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden}
.cmp-col.after .cmp-key{background:var(--ink-800);border-color:var(--ink-800)}
.cmp-metric{background:var(--white);padding:14px 16px}
.cmp-col.after .cmp-metric{background:var(--ink-950)}
.cmp-metric .mv{font-family:var(--font-mono);font-size:19px;letter-spacing:-.02em;color:var(--ink-950)}
.cmp-col.after .cmp-metric .mv{color:#fff}
.cmp-metric .ml{font:var(--t-caption);color:var(--fg-muted);margin-top:3px}
.cmp-col.after .cmp-metric .ml{color:var(--ink-400)}
.cmp-flags{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-bottom:18px}
.cmp-chip{display:inline-flex;align-items:center;gap:6px;font:var(--t-caption);font-weight:600;padding:5px 11px;border-radius:var(--r-pill)}
.cmp-chip [data-lucide]{width:13px;height:13px}
.cmp-chip.neg{background:rgba(199,67,53,.08);color:#B23A2C}
.cmp-chip.neg [data-lucide]{color:#C7503E}
.cmp-col.after .cmp-chip.pos{background:rgba(46,196,122,.15);color:#6BE7A8}
.cmp-col.after .cmp-chip.pos [data-lucide]{color:#6BE7A8}
.cmp-mid{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.cmp-foot{margin-top:18px;display:flex;align-items:center;gap:9px;font:var(--t-caption);font-weight:600;padding-top:16px;border-top:1px solid var(--border)}
.cmp-foot [data-lucide]{width:15px;height:15px;flex:none}
.cmp-foot.outdated{color:#B23A2C;border-top-color:rgba(199,67,53,.2)}
.cmp-foot.recommended{color:#6BE7A8;border-top-color:var(--ink-800)}
@media(max-width:820px){
  .compare{grid-template-columns:1fr}
  .cmp-key{grid-template-columns:1fr 1fr}
}

/* ---------------- case study overview cards ---------------- */
.cs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cs-card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--r-xl);background:var(--white);overflow:hidden;text-decoration:none;color:inherit;transition:transform .22s var(--ease-out),box-shadow .22s var(--ease-out),border-color .22s}
.cs-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--border-strong)}
.cs-card-top{display:flex;align-items:center;justify-content:space-between;padding:22px 26px;border-bottom:1px solid var(--border)}
.cs-card-top img.cs-logo{height:20px}
.cs-card-top img.cs-logo.landing-logo{height:28px;width:auto;border-radius:3px}
.cs-card-top .cs-logo-lockup{gap:8px}
.cs-card-top .brand-word{font-size:18px}
.cs-card-corr{display:inline-flex;align-items:center;gap:8px}
.cs-card-corr img{width:24px;height:auto;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.06)}
.cs-card-corr [data-lucide]{width:13px;height:13px;color:var(--ink-400)}
.cs-card-route{font-family:var(--font-mono);font-weight:600;font-size:13px;letter-spacing:.02em;color:var(--ink-700);display:inline-flex;align-items:center;gap:8px}
.cs-card-route .ar{color:var(--ink-300)}
.cs-card-body{padding:26px;display:flex;flex-direction:column;flex:1}
.cs-card-tags{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.cs-tag{font:var(--t-overline);letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:var(--r-xs);background:var(--ink-100);color:var(--ink-700)}
.cs-card h3{font:var(--t-h3);font-size:23px;margin:0 0 12px;letter-spacing:-.01em;text-wrap:balance}
.cs-card p{font:var(--t-body-sm);color:var(--fg-secondary);margin:0 0 22px;line-height:1.6}
.cs-card-metrics{display:flex;gap:24px;margin-bottom:24px}
.cs-card-metric .v{font-family:var(--font-mono);font-size:26px;letter-spacing:-.03em}
.cs-card-metric .l{font:var(--t-caption);color:var(--fg-muted);margin-top:3px}
.cs-card-cta{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font:var(--t-body-sm);font-weight:600;color:var(--ink-950)}
.cs-card-cta [data-lucide]{width:16px;height:16px;transition:transform .18s var(--ease-out)}
.cs-card:hover .cs-card-cta [data-lucide]{transform:translateX(4px)}
@media(max-width:820px){.cs-grid{grid-template-columns:1fr}.cs-card-metrics{gap:18px}}

/* ---------------- case study detail page ---------------- */
.cs-detail-hero{padding:84px 0 56px;border-bottom:1px solid var(--border)}
.cs-detail-hero .cs-brand{display:flex;align-items:center;gap:14px;margin-bottom:30px}
.cs-detail-hero .cs-brand img{height:24px}
.cs-detail-hero .cs-brand img.landing-logo{height:32px;width:auto;border-radius:3px}
.cs-detail-hero .cs-detail-lockup{gap:9px}
.cs-detail-hero .cs-brand .brand-word{font:500 20px/1 var(--font-display);letter-spacing:0;text-transform:none;color:var(--ink-950)}
.cs-detail-hero .cs-brand .div{width:1px;height:20px;background:var(--border-strong)}
.cs-detail-hero .cs-brand span{font:var(--t-overline);letter-spacing:var(--tracking-overline);text-transform:uppercase;color:var(--ink-500)}
.cs-detail-hero .meta-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.cs-detail-hero h1{font:var(--t-display-lg);letter-spacing:var(--tracking-display);margin:0 0 18px;max-width:20ch;text-wrap:balance}
.cs-detail-hero .lead{font:var(--t-body-lg);color:var(--fg-secondary);max-width:64ch;margin:0}
.cs-detail-hero .corr{display:inline-flex;align-items:center;gap:9px;padding:7px 14px;border:1px solid var(--border-strong);border-radius:var(--r-pill)}
.cs-detail-hero .corr img{width:24px;height:auto;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.06)}
.cs-detail-hero .corr [data-lucide]{width:14px;height:14px;color:var(--ink-400)}
.cs-detail-hero .corr span{font:var(--t-caption);font-weight:600}
.cs-block{padding:66px 0;border-bottom:1px solid var(--border)}
.cs-block .blk-label{display:inline-flex;align-items:center;gap:10px;font:var(--t-overline);letter-spacing:var(--tracking-overline);text-transform:uppercase;color:var(--ink-500);margin-bottom:22px}
.cs-block .blk-label .num{font-family:var(--font-mono);color:var(--ink-900)}
.cs-block h2{font:var(--t-h1);font-size:32px;letter-spacing:-.01em;margin:0 0 20px;max-width:24ch}
.cs-block .prose p{font:var(--t-body-lg);color:var(--ink-800);line-height:1.7;margin:0 0 18px;max-width:70ch}
.cs-results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--ink-800);border:1px solid var(--ink-800);border-radius:var(--r-lg);overflow:hidden}
.cs-result{background:var(--ink-950);color:var(--paper);padding:30px 26px}
.cs-result .rv{font-family:var(--font-mono);font-size:34px;letter-spacing:-.03em;line-height:1}
.cs-result .rl{font:var(--t-body-sm);color:var(--ink-400);margin-top:12px;line-height:1.45}
@media(max-width:900px){.cs-results-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.cs-results-grid{grid-template-columns:1fr}.cs-detail-hero h1{font-size:34px}}

.cs-table{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--ink-200);border:1px solid var(--ink-200);border-radius:var(--r-md);overflow:hidden}
.cs-table-row{display:contents}
.cs-table-row > span{grid-column:span 1;display:flex;align-items:center;padding:12px 14px;background:var(--white);font-family:var(--font-mono);font-size:13px;color:var(--ink-900)}
.cs-table-row > span:nth-child(2n+1){font-weight:600;color:var(--ink-950)}
.cs-table-row > span:nth-child(2n){justify-content:flex-end;color:var(--ink-700)}
.cs-table-row.header > span{background:var(--ink-950);color:var(--ink-400)}
.cs-table-row.header > span:nth-child(2n+1){color:var(--ink-400)}
.cs-table-row.highlight > span{background:var(--ink-950);color:var(--paper)}
.cs-table-row.highlight > span:nth-child(2n){color:var(--ink-200)}
.cs-table-3col{grid-template-columns:1fr 1fr 1fr}
.cs-table-3col > span:nth-child(3n){justify-content:flex-end}

/* Minimalistic cost and comparison tables */
.cost-table{border:1px solid var(--ink-200);border-radius:var(--r-md);overflow:hidden;background:var(--white)}
.cost-row{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--ink-200)}
.cost-row > span{padding:14px 16px;font-size:14px;background:var(--white);color:var(--ink-900)}
.cost-row > span:first-child{font-weight:500}
.cost-row > span:last-child{font-family:var(--font-mono);text-align:right;color:var(--ink-700)}
.cost-row--header{background:var(--ink-200)!important}
.cost-row--header > span{background:var(--ink-950)!important;color:#fff!important;font-weight:600!important;font-size:11px!important;text-transform:uppercase;letter-spacing:.05em!important}
.cost-row--highlight{background:var(--ink-200)}
.cost-row--highlight > span{background:var(--ink-950);color:#fff;font-weight:600}
.cost-row--highlight > span:last-child{color:var(--ink-200)}
.cost-table--3col{grid-template-columns:1.5fr 1fr 1fr}

.compare-table{border:1px solid var(--ink-200);border-radius:var(--r-md);overflow:hidden;background:var(--white)}
.compare-row{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:1px;background:var(--ink-200)}
.compare-row > span{padding:14px 16px;font-size:14px;background:var(--white);color:var(--ink-900)}
.compare-row > span:first-child{font-weight:500}
.compare-row > span:not(:first-child){font-family:var(--font-mono);text-align:right;color:var(--ink-700)}
.compare-row--header{background:var(--ink-200)!important}
.compare-row--header > span{background:var(--ink-950)!important;color:#fff!important;font-weight:600!important;font-size:11px!important;text-transform:uppercase;letter-spacing:.05em!important}
.compare-row--highlight{background:var(--ink-200)}
.compare-row--highlight > span{background:var(--ink-950);color:#fff;font-weight:600}
.compare-row--highlight > span:not(:first-child){color:var(--ink-200)}

.flow-diagram{font-family:var(--font-mono);font-size:14px;padding:14px 16px;background:var(--ink-50);border-radius:var(--r-md);margin:16px 0;color:var(--ink-900);border:1px solid var(--ink-100)}

/* ---------------- contact ---------------- */
.contact-wrap{min-height:54vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:100px 0}
.contact-wrap h1{font:var(--t-display-xl);letter-spacing:var(--tracking-display);margin:0 0 18px}
.contact-wrap p.lead{font:var(--t-body-lg);color:var(--fg-secondary);max-width:46ch;margin:0 0 36px}
.contact-actions{display:flex;flex-direction:column;align-items:center;gap:22px}
.contact-mail{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:17px;color:var(--ink-950);border-bottom:1px solid var(--border-strong);padding-bottom:4px;transition:border-color .16s}
.contact-mail:hover{border-color:var(--ink-950)}
.contact-mail [data-lucide]{width:17px;height:17px}