/* Sera — Research Hub · case-specific artifacts (rh-*). Mockup screens (.rhs) live in mockups.css */
/* ==========================================================================
   v1.8.0 · Research Hub (rh-*)
   ========================================================================== */
.art--rh{--ca:#FF009B;--ca-soft:#FFE3F3;--ca-ink:#0F191E;--rh-pink-ink:#C2157F}
.art--rh .stat.hl b,.art--rh .stat.hl span{color:#fff}
.art--rh .statement p em{color:#FF7CCB}
.art--rh .art-card .art-label,.art--rh .steps3>div::before,.art--rh .quote::before{color:var(--rh-pink-ink)}
.art--rh .art-card .art-label+h4{margin-top:12px}
/* screenshots */
.rh-shot{background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:clamp(12px,2.2vw,30px);overflow:hidden}
.rh-shot>img{display:block;width:100%;height:auto;border-radius:14px;box-shadow:0 24px 50px -30px rgba(15,25,30,.45)}
.rh-shot.is-tint{background:linear-gradient(160deg,#FFF1F9 0%,#F4F0FF 100%)}
.rh-shot.is-dark{border:0;background:radial-gradient(90% 80% at 80% 0%,#3B0D2C 0%,#130A14 55%,#0B0B0F 100%);padding:clamp(18px,4.5vw,64px) clamp(14px,4.5vw,64px) 0;border-radius:32px}
/* system map */
.rh-map{background:var(--ca-ink);border-radius:32px;padding:clamp(24px,4vw,56px);color:#DDE5E9}
.rh-map-grid{display:grid;grid-template-columns:1fr 96px 1.15fr 96px 1fr;align-items:center}
.rh-stack{display:grid;gap:14px}
.rh-node{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);border-radius:20px;padding:20px}
.rh-node .art-label{color:#FF7CCB}
.rh-node h4{margin-top:8px;font-size:19px;font-weight:600;color:#fff}
.rh-node p{margin-top:6px;font-size:15px;line-height:1.5;color:rgba(255,255,255,.82)}
.rh-node.is-hub{background:linear-gradient(160deg,rgba(255,0,155,.22),rgba(255,0,155,.06));border-color:rgba(255,0,155,.45);padding:26px}
.rh-node.is-hub h4{font-family:var(--display);font-weight:500;font-size:26px;letter-spacing:-.02em}
.rh-arrow{position:relative;height:2px;margin:0 10px;background:linear-gradient(90deg,rgba(255,124,203,.25),#FF7CCB)}
.rh-arrow::after{content:"";position:absolute;right:-2px;top:-5px;border-left:9px solid #FF7CCB;border-top:6px solid transparent;border-bottom:6px solid transparent}
.rh-arrow.both::before{content:"";position:absolute;left:-2px;top:-5px;border-right:9px solid rgba(255,124,203,.6);border-top:6px solid transparent;border-bottom:6px solid transparent}
.rh-arrow small{position:absolute;top:-24px;left:50%;transform:translateX(-50%);font:500 10.5px "Geist Mono",monospace;letter-spacing:.06em;color:#FF7CCB;white-space:nowrap}
.rh-map-foot{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1)}
.rh-map-foot span{font:400 11.5px "Geist Mono",monospace;letter-spacing:.04em;padding:6px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.16);color:#B8C6CC}
/* MCP */
.rh-mcp{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.rh-term{background:var(--ca-ink);color:#DDE5E9;border-radius:22px;padding:26px 28px;font:400 13.5px/1.75 "Geist Mono",monospace;overflow-x:auto}
.rh-term .c{color:#6E8791}
.rh-term .p{color:#FF7CCB}
.rh-term .g{color:#7DE6B4}
.rh-mcp-why{display:grid;gap:16px}
.rh-mcp-why>div{padding:24px;border-radius:20px;background:var(--surface);border:1px solid var(--line)}
.rh-mcp-why .art-label{color:var(--rh-pink-ink)}
.rh-mcp-why p{margin-top:10px;font-size:15px}
/* format */
.rh-format{display:grid;grid-template-columns:1fr 1.3fr;gap:clamp(20px,4vw,48px);align-items:start}
.rh-anatomy{list-style:none;border-top:1px solid var(--ink)}
.rh-anatomy li{display:grid;grid-template-columns:52px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}
.rh-anatomy li>span{font:500 13px "Geist Mono",monospace;color:var(--rh-pink-ink);padding-top:3px}
.rh-anatomy b{display:block;font-size:16.5px;font-weight:600;color:var(--ink)}
.rh-anatomy small{display:block;margin-top:2px;font-size:14.5px;color:var(--muted)}
/* ask: desktop + phone */
.rh-duo{display:grid;grid-template-columns:1.9fr 1fr;gap:16px;align-items:stretch}
.rh-phone{display:flex;align-items:flex-end;justify-content:center;padding:32px 18px 0;overflow:hidden;border-radius:28px;border:1px solid var(--line);background:radial-gradient(100% 80% at 50% 0%,#FFE3F3 0%,var(--bg) 75%)}
/* privacy */
.rh-locks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:20px}
.rh-locks>div{padding:22px;border-radius:20px;background:var(--surface);border:1px solid var(--line)}
.rh-locks .ic{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--ca-soft);color:var(--rh-pink-ink)}
.rh-locks svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.rh-locks h4{margin-top:14px;font-size:16.5px;font-weight:600;line-height:1.3;color:var(--ink)}
.rh-locks p{margin-top:6px;font-size:14.5px}
/* learnings */
.rh-learn{border-top:1px solid var(--ink)}
.rh-learn>div{display:grid;grid-template-columns:1fr 1.4fr;gap:32px;padding:26px 0;border-bottom:1px solid var(--line)}
.rh-learn h3{font-family:var(--display);font-weight:500;font-stretch:92%;font-size:clamp(22px,2.4vw,30px);line-height:1.1;letter-spacing:-.025em;color:var(--ink)}
.rh-learn p{font-size:16px;color:var(--ink-2)}
@media (max-width:1000px){
  .rh-map-grid{grid-template-columns:1fr;gap:18px}
  .rh-arrow{width:2px;height:34px;margin:0 auto;background:linear-gradient(180deg,rgba(255,124,203,.25),#FF7CCB)}
  .rh-arrow::after{right:auto;left:-5px;top:auto;bottom:-2px;border-left:6px solid transparent;border-right:6px solid transparent;border-top:9px solid #FF7CCB;border-bottom:0}
  .rh-arrow.both::before{display:none}
  .rh-arrow small{top:50%;left:14px;transform:translateY(-50%)}
  .rh-mcp,.rh-format,.rh-duo{grid-template-columns:1fr}
  .rh-locks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rh-learn>div{grid-template-columns:1fr;gap:10px}
}
@media (max-width:640px){
  .rh-locks{grid-template-columns:1fr}
  .rh-term{font-size:12px;padding:20px}
}
/* v2.2 · connector diagram */
.rh-cx{display:grid;grid-template-columns:1.55fr 1fr;gap:16px;align-items:stretch}
.rh-cx-flow{display:grid;grid-template-columns:1fr 76px 1.25fr 76px 1fr;align-items:stretch;padding:clamp(18px,2.4vw,28px);border-radius:28px;background:var(--ca-ink);color:#DDE5E9}
.rh-cx-node{display:flex;flex-direction:column;padding:18px;border-radius:18px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04)}
.rh-cx-node .art-label{color:#FF7CCB}
.rh-cx-node h4{margin-top:8px;font-size:17px;font-weight:600;line-height:1.25;color:#fff}
.rh-cx-node p{margin-top:6px;font-size:14px;line-height:1.5;color:rgba(255,255,255,.82)}
.rh-cx-node.is-gate{background:linear-gradient(160deg,rgba(255,0,155,.24),rgba(255,0,155,.06));border-color:rgba(255,0,155,.5)}
.rh-cx-tools{display:grid;gap:8px;margin-top:auto;padding-top:14px}
.rh-cx-tools>div{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.rh-cx-tools b{width:100%;font:500 10.5px "Geist Mono",monospace;letter-spacing:.08em;text-transform:uppercase;color:#FFD1EC}
.rh-cx-tools code,.rh-cx-chat code{padding:3px 8px;border-radius:7px;background:#0B1116;border:1px solid rgba(255,255,255,.12);color:#FF9AD6;font:500 11.5px "Geist Mono",monospace}
.rh-cx-tools em{font-style:normal;font-size:11.5px;color:#9FB0B8}
.rh-cx-arrow{position:relative;display:flex;flex-direction:column;justify-content:center;gap:34px}
.rh-cx-arrow::before{content:"";position:absolute;left:6px;right:6px;top:50%;height:2px;background:linear-gradient(90deg,rgba(255,124,203,.3),#FF7CCB)}
.rh-cx-arrow::after{content:"";position:absolute;right:2px;top:calc(50% - 5px);border-left:9px solid #FF7CCB;border-top:6px solid transparent;border-bottom:6px solid transparent}
.rh-cx-arrow small{position:relative;white-space:nowrap;font:500 10px/1.3 "Geist Mono",monospace;letter-spacing:.04em;text-align:center;color:#FF9AD6}
.rh-cx-chat{display:flex;flex-direction:column;gap:10px;padding:clamp(18px,2.4vw,28px);border-radius:28px;background:var(--surface);border:1px solid var(--line)}
.rh-cx-chat .art-label{color:var(--rh-pink-ink)}
.rh-cx-chat .q{align-self:flex-end;max-width:90%;padding:10px 14px;border-radius:16px 16px 4px 16px;background:var(--ca-ink);color:#fff;font-size:14.5px}
.rh-cx-chat .tool{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.rh-cx-chat .tool code{background:var(--ca-ink);border-color:var(--ca-ink)}
.rh-cx-chat .a{font-size:14.5px;line-height:1.6;color:var(--ink-2)}
.rh-cx-chat .src{display:inline-block;padding:0 7px;border-radius:6px;background:var(--rh-pink-ink);color:#fff;font-size:12.5px;font-weight:600}
@media (max-width:1000px){
  .rh-cx{grid-template-columns:1fr}
  .rh-cx-flow{grid-template-columns:1fr;gap:0}
  .rh-cx-arrow{height:52px;gap:0;flex-direction:row;justify-content:flex-start;padding-left:28px}
  .rh-cx-arrow::before{left:18px;right:auto;top:6px;bottom:6px;width:2px;height:auto;background:linear-gradient(180deg,rgba(255,124,203,.3),#FF7CCB)}
  .rh-cx-arrow::after{right:auto;left:13px;top:auto;bottom:2px;border-left:6px solid transparent;border-right:6px solid transparent;border-top:9px solid #FF7CCB;border-bottom:0}
  .rh-cx-arrow small{align-self:center;text-align:left;margin-right:14px}
}
/* v2.4: Ask the archive, extras */
.rh-askmore{display:grid;grid-template-columns:1fr 1.9fr;gap:16px;margin-top:16px;align-items:stretch}
.rh-askmore-list{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:28px;overflow:hidden}
.rh-askmore-list>div{display:flex;flex-direction:column;gap:6px;padding:22px 22px 24px;background:var(--surface)}
.rh-askmore-list i{font:500 12px "Geist Mono",monospace;font-style:normal;color:var(--muted)}
.rh-askmore-list b{font-size:16px;line-height:1.3;color:var(--ink)}
.rh-askmore-list span{font-size:14px;line-height:1.5;color:var(--ink-2)}
@media (max-width:860px){
  .rh-askmore{grid-template-columns:1fr}
}
@media (max-width:560px){
  .rh-askmore-list{grid-template-columns:1fr}
}

/* v3.2 · skill flow → shared timeline (.tl) */
.art--rh .tl{--tl-line:#FF009B;--tl-dot:#FF009B;--tl-dot-ring:#FF009B;--tl-halo:rgba(255,0,155,.16);--tl-txt:#C2157F}

/* ==========================================================================
   .tl · one timeline for every case (identical block in rh.css and wb.css)
   desktop: horizontal track · ≤900: vertical, rule on the left
   anatomy: marker · mono index · title · one-line description · one mono meta
   motion (only .mk-anim.is-live, never under reduced motion):
     entrance  the rule draws start→end in 1.4s, markers pop in sequence
     loop 7.2s the highlight travels marker to marker up to the key step,
               the key ripples at 50%, then it eases back (92–100%)
   base styles = the informative state: path to the key step lit.
   per case: --tl-line (rule highlight) --tl-dot/--tl-dot-ring (lit marker)
             --tl-halo (key glow) --tl-txt (accent text)
   ========================================================================== */
.tl{--tl-base:rgba(15,25,30,.16);--tl-off:scaleX(0);--tl-origin:left center;margin-top:40px}
.tl-list{position:relative;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(var(--n),minmax(0,1fr))}
.tl-step{position:relative;min-width:0;padding:30px clamp(14px,1.8vw,28px) 0 0}
.tl-step::before,.tl-step::after{content:"";position:absolute;left:6px;top:6px;width:100%;height:1px;background:var(--tl-base);transform-origin:var(--tl-origin)}
.tl-step::after{top:5.5px;height:2px;background:var(--tl-line)}
.tl-step:last-child::before,.tl-step:not(.is-path)::after{display:none}
.tl-mark{position:absolute;left:0;top:0;z-index:1;width:13px;height:13px;border-radius:50%;background:var(--surface);border:1.5px solid var(--ink)}
.tl-mark::before,.tl-mark::after{content:"";position:absolute;inset:-1.5px;border-radius:inherit;pointer-events:none}
.tl-mark::after{background:var(--tl-dot);border:1.5px solid var(--tl-dot-ring);opacity:0}
.tl-step.is-path .tl-mark::after{opacity:1}
.tl-step.is-you .tl-mark{border-radius:3px;rotate:45deg}
.tl-step.is-you.is-path .tl-mark::after{background:var(--ink);border-color:var(--ink)}
.tl-step.is-key .tl-mark{left:-3px;top:-3px;width:19px;height:19px;background:var(--tl-dot);border-color:var(--tl-dot-ring);box-shadow:0 0 0 6px var(--tl-halo)}
.tl-step.is-key.is-you .tl-mark{border-radius:4px}
.tl-step.is-key .tl-mark::after{inset:-9px;background:var(--tl-halo);border:0;z-index:-1}
.tl-step.is-key .tl-mark::before{border:1.5px solid var(--tl-dot-ring);opacity:0}
.tl-idx{display:block;font:500 11.5px/1 var(--mono);letter-spacing:.06em;color:var(--muted)}
.tl-title{margin-top:12px;font-size:16.5px;line-height:1.25;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.tl-desc{margin:8px 0 0;font-size:14px;line-height:1.5;color:var(--ink-2)}
.tl-meta{display:block;margin-top:14px;font:500 10.5px/1.4 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tl-step.is-you .tl-meta,.tl-step.is-key .tl-meta,.tl-step.is-key .tl-idx{color:var(--tl-txt)}
@media (max-width:900px){
  .tl{--tl-off:scaleY(0);--tl-origin:center top;margin-top:32px;max-width:640px}
  .tl-list{grid-template-columns:minmax(0,1fr)}
  .tl-step{padding:0 0 40px 38px}
  .tl-step:last-child{padding-bottom:0}
  .tl-step::before,.tl-step::after{left:6px;top:6px;bottom:-6px;width:1px;height:auto}
  .tl-step::after{left:5.5px;width:2px}
  .tl-idx{padding-top:1px}
  .tl-title{margin-top:8px;font-size:18px}
  .tl-desc{font-size:15px}
  .tl-meta{margin-top:12px}
}
@media (prefers-reduced-motion:no-preference){
  .tl.mk-anim .tl-step::before{animation:tl-draw var(--tl-step) linear calc(var(--i) * var(--tl-step)) both paused}
  .tl.mk-anim .tl-mark{animation:tl-pop .55s cubic-bezier(.34,1.56,.64,1) calc(var(--i) * var(--tl-step)) both paused}
  .tl.mk-anim .tl-step.is-path::after,.tl.mk-anim .tl-step.is-path .tl-mark::after,.tl.mk-anim .tl-step.is-key .tl-mark::after{animation-duration:7.2s;animation-timing-function:cubic-bezier(.2,.7,.2,1);animation-delay:1.7s;animation-iteration-count:infinite;animation-fill-mode:backwards;animation-play-state:paused}
  .tl.mk-anim .tl-step.is-key .tl-mark::before{animation:tl-ripple 7.2s cubic-bezier(.2,.7,.2,1) 1.7s infinite backwards paused}
  .tl.mk-anim.is-live .tl-step.tl-step::before,.tl.mk-anim.is-live .tl-step.tl-step .tl-mark,.tl.mk-anim.is-live .tl-step.tl-step::after,.tl.mk-anim.is-live .tl-step.tl-step .tl-mark::after,.tl.mk-anim.is-live .tl-step.tl-step .tl-mark::before{animation-play-state:running}
  .tl-step:nth-child(1)::after{animation-name:tl-seg-0}.tl-step:nth-child(1) .tl-mark::after{animation-name:tl-hl-0}
  .tl-step:nth-child(2)::after{animation-name:tl-seg-1}.tl-step:nth-child(2) .tl-mark::after{animation-name:tl-hl-1}
  .tl-step:nth-child(3)::after{animation-name:tl-seg-2}.tl-step:nth-child(3) .tl-mark::after{animation-name:tl-hl-2}
  .tl-step:nth-child(4)::after{animation-name:tl-seg-3}.tl-step:nth-child(4) .tl-mark::after{animation-name:tl-hl-3}
  .tl-step:nth-child(5)::after{animation-name:tl-seg-4}.tl-step:nth-child(5) .tl-mark::after{animation-name:tl-hl-4}
  .tl-step:nth-child(6)::after{animation-name:tl-seg-5}.tl-step:nth-child(6) .tl-mark::after{animation-name:tl-hl-5}
  .tl-step:nth-child(7)::after{animation-name:tl-seg-6}.tl-step:nth-child(7) .tl-mark::after{animation-name:tl-hl-6}
  .tl-step:nth-child(8)::after{animation-name:tl-seg-7}.tl-step:nth-child(8) .tl-mark::after{animation-name:tl-hl-7}
}
@keyframes tl-draw{from{transform:var(--tl-off)}to{transform:none}}
@keyframes tl-pop{0%{opacity:0;scale:0}60%{opacity:1;scale:1.35}100%{opacity:1;scale:1}}
@keyframes tl-ripple{0%,48%{opacity:0;scale:1}50%{opacity:.9;scale:1}64%,100%{opacity:0;scale:2.8}}
@keyframes tl-seg-0{0%,4%{transform:var(--tl-off)}10%,98.6%{transform:none}100%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-0{0%,2%{opacity:0;scale:.3}4.5%{opacity:1;scale:1.45}8%,98.6%{opacity:1;scale:1}100%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-1{0%,10%{transform:var(--tl-off)}16%,97.2%{transform:none}98.6%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-1{0%,10%{opacity:0;scale:.3}12.5%{opacity:1;scale:1.45}16%,98.6%{opacity:1;scale:1}100%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-2{0%,16%{transform:var(--tl-off)}22%,95.8%{transform:none}97.2%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-2{0%,16%{opacity:0;scale:.3}18.5%{opacity:1;scale:1.45}22%,97.2%{opacity:1;scale:1}98.6%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-3{0%,22%{transform:var(--tl-off)}28%,94.4%{transform:none}95.8%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-3{0%,22%{opacity:0;scale:.3}24.5%{opacity:1;scale:1.45}28%,95.8%{opacity:1;scale:1}97.2%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-4{0%,28%{transform:var(--tl-off)}34%,93%{transform:none}94.4%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-4{0%,28%{opacity:0;scale:.3}30.5%{opacity:1;scale:1.45}34%,94.4%{opacity:1;scale:1}95.8%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-5{0%,34%{transform:var(--tl-off)}40%,91.6%{transform:none}93%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-5{0%,34%{opacity:0;scale:.3}36.5%{opacity:1;scale:1.45}40%,93%{opacity:1;scale:1}94.4%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-6{0%,40%{transform:var(--tl-off)}46%,90.2%{transform:none}91.6%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-6{0%,40%{opacity:0;scale:.3}42.5%{opacity:1;scale:1.45}46%,91.6%{opacity:1;scale:1}93%,100%{opacity:0;scale:.3}}
@keyframes tl-seg-7{0%,46%{transform:var(--tl-off)}52%,88.8%{transform:none}90.2%,100%{transform:var(--tl-off)}}
@keyframes tl-hl-7{0%,46%{opacity:0;scale:.3}48.5%{opacity:1;scale:1.45}52%,90.2%{opacity:1;scale:1}91.6%,100%{opacity:0;scale:.3}}
/* PT: longer arrow labels in the connector diagram wrap instead of running into the nodes */
:lang(pt) .rh-cx-arrow small{white-space:normal;padding:0 6px;line-height:1.25}
@media (max-width:1000px){:lang(pt) .rh-cx-arrow small{padding:0}}