:root{
  --paper:#F5F5F7; --paper-2:#ECECEF; --card:#FFFFFF; --card-2:#FAFAFB;
  --ink:#0A0B0D; --ink-2:#1A1C22; --muted:#5C5F66; --faint:#6B6E76;
  --line:rgba(10,11,13,.10); --line-2:rgba(10,11,13,.06);
  --accent:#7C3AED; --accent-2:#A78BFA; --accent-3:#5B5BFF; --accent-ink:#fff;
  --accent-wash:rgba(124,58,237,.09); --accent-grad:linear-gradient(120deg,#5B5BFF,#A23BFF);
  --ok:#12A150; --ok-wash:rgba(18,161,80,.10); --warn:#E8A317; --warn-wash:rgba(232,163,23,.12);
  --info:#2E7BEE; --info-wash:rgba(46,123,238,.10); --danger:#E5484D;
  --panel:#0C0D11; --panel-2:#15171D; --panel-ink:#F2F3F5; --panel-muted:#9A9DA6; --panel-line:rgba(242,243,245,.12);
  --r-sm:10px; --r:14px; --r-lg:20px; --r-xl:26px; --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(10,14,26,.05),0 2px 8px rgba(10,14,26,.05);
  --shadow:0 10px 34px rgba(10,14,26,.10),0 2px 8px rgba(10,14,26,.05);
  --shadow-lg:0 30px 80px rgba(10,14,26,.18),0 8px 24px rgba(10,14,26,.10);
  --ease:cubic-bezier(.2,.7,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
  --display:'Bricolage Grotesque',system-ui,sans-serif; --body:'Hanken Grotesk',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --rail-x:41px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--body);color:var(--ink);background:var(--paper);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
button{font:inherit;color:inherit;cursor:pointer;border:none;background:none}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ============ TOP BAR ============ */
.topbar{
  position:sticky;top:0;z-index:40;height:58px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 clamp(14px,3vw,26px);
  background:rgba(255,255,255,.9);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid var(--line);
}
.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);
  font-family:var(--display);font-weight:800;letter-spacing:-.02em;font-size:1.05rem}
.brand-dot{width:9px;height:9px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px var(--accent-wash),0 0 12px 2px rgba(124,58,237,.55)}
.topbar-mid{display:flex;align-items:center;gap:12px;min-width:0;flex:1;justify-content:center}
.demo-name{font-family:var(--display);font-weight:600;font-size:.98rem;color:var(--ink-2);white-space:nowrap}
.live-pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:.62rem;
  text-transform:uppercase;letter-spacing:.06em;color:var(--muted);
  border:1px solid var(--line);border-radius:var(--r-pill);padding:.26rem .6rem;background:var(--card)}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px var(--ok-wash);animation:pulse 1.8s var(--ease) infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(18,161,80,.45)}50%{box-shadow:0 0 0 5px rgba(18,161,80,0)}}
.topbar-cta{flex-shrink:0;text-decoration:none;background:var(--ink);color:#fff;font-weight:600;font-size:.9rem;
  padding:.5rem 1rem;border-radius:var(--r-pill);transition:transform .18s var(--ease-out),box-shadow .18s var(--ease-out),background .18s}
.topbar-cta:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(10,11,13,.22);background:#000}
.topbar-cta:active{transform:scale(.97)}
@media(max-width:720px){
  .topbar-mid{justify-content:flex-end;flex:0 1 auto}
  .demo-name,.live-pill{display:none}
}

/* ============ STAGE / STUDIO ============ */
.stage{min-height:calc(100dvh - 58px);display:flex;flex-direction:column;padding:clamp(14px,3vw,30px)}
.studio{flex:1;display:flex;flex-direction:column;gap:clamp(16px,2vw,22px);width:100%;max-width:1240px;margin:0 auto;min-height:0}

.studio-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.head-left{max-width:600px}
.studio-title{font-family:var(--display);font-weight:800;letter-spacing:-.035em;line-height:1.02;
  font-size:clamp(1.7rem,3.4vw,2.5rem);color:var(--ink)}
.studio-sub{margin-top:.5rem;color:var(--muted);font-size:clamp(.95rem,1.6vw,1.06rem);max-width:52ch}

/* tabs */
.tabs{display:inline-flex;gap:4px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:4px;box-shadow:var(--shadow-sm);max-width:100%;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{font-family:var(--body);font-weight:600;font-size:.9rem;color:var(--muted);white-space:nowrap;
  padding:.5rem .95rem;border-radius:var(--r-pill);transition:color .18s var(--ease-out),background .18s var(--ease-out)}
.tab:hover{color:var(--ink-2)}
.tab[aria-selected="true"]{background:var(--ink);color:#fff}
.tab:active{transform:scale(.97)}
.tab:disabled{opacity:.5;cursor:not-allowed}

/* ============ WORKSPACE ============ */
.workspace{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 366px;gap:18px;min-height:0}

/* ---- CANVAS ---- */
.canvas{display:flex;flex-direction:column;min-height:0;position:relative;
  background:
    radial-gradient(circle at 1px 1px, rgba(10,11,13,.05) 1px, transparent 0) 0 0/22px 22px,
    var(--card-2);
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden}
.canvas-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:14px clamp(14px,2vw,20px);border-bottom:1px solid var(--line);background:rgba(255,255,255,.72);
  backdrop-filter:blur(8px);position:relative;z-index:5}
.canvas-meta{display:flex;flex-direction:column;gap:1px;min-width:0}
.tpl-name{font-family:var(--display);font-weight:700;font-size:1.02rem;letter-spacing:-.02em}
.tpl-trigger{font-size:.82rem;color:var(--muted)}
.btn-run{display:inline-flex;align-items:center;gap:9px;color:var(--accent-ink);font-weight:700;font-size:.92rem;
  padding:.62rem 1.15rem;border-radius:var(--r-pill);background:var(--accent-grad);
  box-shadow:0 8px 22px rgba(124,58,237,.34),inset 0 1px 0 rgba(255,255,255,.25);
  transition:transform .18s var(--ease-out),box-shadow .2s var(--ease-out),filter .2s}
.btn-run:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(124,58,237,.42)}
.btn-run:active{transform:scale(.97)}
.btn-run:disabled{filter:saturate(.5) brightness(1.02);cursor:progress;transform:none;box-shadow:0 4px 14px rgba(124,58,237,.22)}
.btn-run .run-ico{width:18px;height:18px;display:inline-block;flex-shrink:0}
.btn-run.is-running .run-ico{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---- FLOW ---- */
.flow{flex:1;overflow:auto;padding:clamp(18px,2.6vw,30px) clamp(16px,2.4vw,26px);position:relative;z-index:2}
.token{position:absolute;left:0;top:0;width:14px;height:14px;border-radius:50%;background:var(--accent);
  opacity:0;pointer-events:none;z-index:8;
  box-shadow:0 0 0 5px var(--accent-wash),0 0 22px 6px rgba(124,58,237,.6);
  transition:transform .54s var(--ease),opacity .28s var(--ease-out)}
.token.on{opacity:1}
.token::after{content:"";position:absolute;inset:-3px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.9),transparent 60%)}

/* node */
.node{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;
  box-shadow:var(--shadow-sm);transition:box-shadow .22s var(--ease-out),border-color .22s var(--ease-out),
  transform .22s var(--ease-out),opacity .22s var(--ease-out);will-change:transform}
.node-badge{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;flex-shrink:0;
  color:var(--muted);background:var(--paper-2)}
.node-badge svg{width:22px;height:22px}
.node-main{min-width:0;display:block}
.node-title{display:block;font-family:var(--display);font-weight:600;font-size:1rem;letter-spacing:-.01em;line-height:1.25}
.node-sub{display:block;font-size:.82rem;color:var(--muted);margin-top:2px;line-height:1.3}
.node-right{display:flex;align-items:center;gap:12px}

/* channel tints */
.node[data-ch="trigger"] .node-badge{color:#fff;background:var(--accent-grad);box-shadow:0 6px 16px rgba(124,58,237,.34)}
.node[data-ch="email"]  .node-badge{color:var(--info);background:var(--info-wash)}
.node[data-ch="sms"]    .node-badge{color:var(--accent-3);background:rgba(91,91,255,.10)}
.node[data-ch="crm"]    .node-badge{color:var(--ok);background:var(--ok-wash)}
.node[data-ch="chat"]   .node-badge{color:var(--ok);background:var(--ok-wash)}
.node[data-ch="alert"]  .node-badge{color:var(--warn);background:var(--warn-wash)}
.node[data-ch="wait"]   .node-badge{color:var(--faint);background:var(--paper-2)}
.node[data-ch="review"] .node-badge{color:var(--warn);background:var(--warn-wash)}
.node[data-ch="publish"].node-badge,.node[data-ch="publish"] .node-badge{color:var(--accent);background:var(--accent-wash)}

/* trigger node accent frame */
.node.is-trigger{border-color:rgba(124,58,237,.32);background:linear-gradient(180deg,var(--accent-wash),var(--card) 60%)}
.node.is-trigger .node-tagline{display:inline-flex;align-items:center;font-family:var(--mono);font-size:.6rem;
  text-transform:uppercase;letter-spacing:.08em;color:var(--accent);border:1px solid rgba(124,58,237,.3);
  border-radius:var(--r-pill);padding:.14rem .5rem}

/* run states */
.node.is-active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-wash),var(--shadow);transform:translateY(-1px)}
.node.is-active .node-badge{animation:badgePop .4s var(--ease-out)}
@keyframes badgePop{0%{transform:scale(.9)}55%{transform:scale(1.08)}100%{transform:scale(1)}}
.node.is-done{border-color:rgba(18,161,80,.4)}
.node.is-off{opacity:.5}
.node.is-off .node-badge{filter:grayscale(1)}
.node.is-skip{opacity:.5}

/* state chip */
.node-state{display:none;align-items:center;gap:5px;font-family:var(--mono);font-size:.6rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.05em;padding:.2rem .5rem;border-radius:var(--r-pill);white-space:nowrap}
.node.is-active .node-state{display:inline-flex;color:var(--accent);background:var(--accent-wash)}
.node.is-done .node-state{display:inline-flex;color:var(--ok);background:var(--ok-wash)}
.node.is-skip .node-state{display:inline-flex;color:var(--muted);background:var(--paper-2)}
.node-state .dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.node.is-active .node-state .dot{animation:pulse2 1s infinite}
@keyframes pulse2{0%,100%{opacity:1}50%{opacity:.3}}
.node-state svg{width:12px;height:12px}

/* toggle */
.toggle{position:relative;width:40px;height:23px;border-radius:var(--r-pill);background:var(--paper-2);
  border:1px solid var(--line);flex-shrink:0;transition:background .2s var(--ease-out)}
.toggle::after{content:"";position:absolute;top:50%;left:2px;transform:translateY(-50%);width:17px;height:17px;
  border-radius:50%;background:#fff;box-shadow:var(--shadow-sm);transition:left .2s var(--ease-out)}
.toggle[aria-checked="true"]{background:var(--accent)}
.toggle[aria-checked="true"]::after{left:19px}
.toggle:active::after{width:20px}
.toggle:disabled{cursor:not-allowed}

/* connector */
.conn{height:26px;position:relative;pointer-events:none}
.conn span{position:absolute;top:-3px;bottom:-3px;left:var(--rail-x);width:2px;transform:translateX(-1px);
  background:var(--line);border-radius:2px;transition:background .3s var(--ease-out)}
.conn.lit span{background:linear-gradient(180deg,var(--accent-3),var(--accent))}
.conn.lit span::after{content:"";position:absolute;left:50%;bottom:-1px;transform:translateX(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ============ RAIL ============ */
.rail{display:flex;flex-direction:column;gap:14px;min-height:0}
.counters{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:13px 14px;
  box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.stat-ico{position:absolute;top:12px;right:12px;width:18px;height:18px;color:var(--faint);opacity:.85}
.stat-ico svg{width:18px;height:18px}
.stat-num{display:block;font-family:var(--display);font-weight:800;font-size:1.5rem;letter-spacing:-.03em;line-height:1;color:var(--ink)}
.stat-label{display:block;margin-top:3px;font-size:.76rem;color:var(--muted)}
.stat.bump{animation:statBump .5s var(--ease-out)}
@keyframes statBump{0%{transform:scale(1)}30%{transform:scale(1.04)}100%{transform:scale(1)}}
.stat.bump .stat-num{color:var(--accent)}
.stat[data-counter="email"] .stat-ico{color:var(--info)}
.stat[data-counter="sms"] .stat-ico{color:var(--accent-3)}
.stat[data-counter="review"] .stat-ico{color:var(--warn)}
.stat[data-counter="lead"] .stat-ico{color:var(--ok)}

/* log */
.logwrap{flex:1;min-height:220px;display:flex;flex-direction:column;background:var(--panel);
  border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden;border:1px solid rgba(0,0,0,.4)}
.log-head{display:flex;align-items:center;justify-content:space-between;padding:12px 15px;border-bottom:1px solid var(--panel-line)}
.log-title{display:inline-flex;align-items:center;gap:8px;color:var(--panel-ink);font-family:var(--display);font-weight:600;font-size:.92rem}
.log-dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 8px 1px rgba(18,161,80,.7)}
.log-clear{font-family:var(--mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--panel-muted);
  padding:.28rem .55rem;border-radius:var(--r-sm);transition:background .18s,color .18s}
.log-clear:hover{background:rgba(255,255,255,.07);color:var(--panel-ink)}
.log{flex:1;overflow:auto;padding:8px 14px 14px;list-style:none;font-family:var(--mono);font-size:.76rem;
  color:var(--panel-ink);scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}
.log::-webkit-scrollbar{width:8px}
.log::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:8px}
.log-line{display:grid;grid-template-columns:auto auto 1fr;gap:8px;align-items:baseline;padding:5px 0;
  border-bottom:1px solid rgba(242,243,245,.05);animation:lineIn .28s var(--ease-out)}
@keyframes lineIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.log-line .ts{color:var(--panel-muted);font-size:.7rem;white-space:nowrap}
.log-line .tag{font-size:.6rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;
  padding:.06rem .4rem;border-radius:5px;white-space:nowrap;align-self:center}
.log-line .msg{color:var(--panel-ink);min-width:0;word-break:break-word}
.log-line .ok{color:var(--ok);font-weight:600}
.tag.t-trigger{color:#d6c2ff;background:rgba(124,58,237,.22)}
.tag.t-email{color:#a9c8ff;background:rgba(46,123,238,.18)}
.tag.t-sms{color:#bcbcff;background:rgba(91,91,255,.2)}
.tag.t-crm{color:#8ee6b4;background:rgba(18,161,80,.18)}
.tag.t-alert{color:#f4d38a;background:rgba(232,163,23,.18)}
.tag.t-wait{color:var(--panel-muted);background:rgba(255,255,255,.07)}
.tag.t-review{color:#f4d38a;background:rgba(232,163,23,.18)}
.tag.t-skip{color:#f0a2a4;background:rgba(229,72,77,.15)}
.log-line.is-skip .msg{color:var(--panel-muted)}
.log-sep{padding:10px 0 5px;color:var(--panel-muted);font-size:.66rem;text-transform:uppercase;letter-spacing:.06em;
  display:flex;align-items:center;gap:8px}
.log-sep::after{content:"";flex:1;height:1px;background:var(--panel-line)}
.log-sep.hist{opacity:.7}

/* ============ RESPONSIVE ============ */
@media(max-width:980px){
  .workspace{grid-template-columns:1fr;display:block}
  .canvas{overflow:visible}
  .flow{overflow:visible}
  .rail{margin-top:18px}
  .logwrap{min-height:280px}
}
@media(max-width:560px){
  .studio-head{align-items:flex-start}
  .tabs{width:100%}
  .canvas-bar{gap:10px}
  .btn-run{width:100%;justify-content:center}
  .counters{grid-template-columns:1fr 1fr}
  .node{padding:12px 13px;gap:11px}
  .node-badge{width:42px;height:42px}
  :root{--rail-x:34px}
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}