:root{
  --ground:#EEF0F1; --panel:#FFFFFF; --ink:#15191C; --muted:#5E676D; --line:#D6DBDE;
  --accent:#0B7F74; --accent-ink:#FFFFFF; --accent-soft:#DDEFEC; --danger:#B3261E;
  --code:#F6F8F8; --shadow:0 1px 2px rgba(15,30,35,.06),0 6px 20px rgba(15,30,35,.06);
  --f-display:"Unbounded","Onest",system-ui,sans-serif;
  --f-body:"Onest",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#0F1315; --panel:#171C1F; --ink:#E6EBED; --muted:#8C979D; --line:#2A3236;
    --accent:#3CC2B3; --accent-ink:#06201D; --accent-soft:#16312E; --danger:#F2867E;
    --code:#12171A; --shadow:0 1px 2px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"]{
  --ground:#0F1315; --panel:#171C1F; --ink:#E6EBED; --muted:#8C979D; --line:#2A3236;
  --accent:#3CC2B3; --accent-ink:#06201D; --accent-soft:#16312E; --danger:#F2867E;
  --code:#12171A; --shadow:0 1px 2px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.app{display:grid;grid-template-columns:280px 1fr;min-height:100%}
/* ---------- sidebar ---------- */
.side{border-right:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;gap:18px;padding:20px 16px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{font-family:var(--f-display);font-weight:700;font-size:17px;letter-spacing:-.01em;line-height:1.15;display:flex;align-items:center;gap:10px}
.brand .mark{width:26px;height:20px;border:2px solid var(--ink);border-radius:3px;position:relative;flex:none}
.brand .mark::before,.brand .mark::after{content:"";position:absolute;top:3px;bottom:3px;width:2px;background:var(--accent)}
.brand .mark::before{left:6px}.brand .mark::after{right:6px}
.search{position:relative}
.search input{width:100%;padding:9px 12px 9px 34px;border:1px solid var(--line);border-radius:8px;background:var(--ground)}
.search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--muted)}
.creator{display:flex;flex-direction:column;gap:6px}
.creator-row{display:flex;align-items:center;gap:4px}
.creator select{flex:1;min-width:0;appearance:none;border:1px solid var(--line);border-radius:8px;padding:8px 30px 8px 12px;font:inherit;font-weight:600;color:var(--ink);background:var(--ground) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235E676D' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center}
.creator-row .icon-btn{font-size:17px;line-height:1}
.lbl{font-size:11px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.tree{display:flex;flex-direction:column;gap:16px;flex:1}
.sec-head{display:flex;align-items:center;gap:4px;padding:0 4px 4px}
.sec-name{flex:1;font-size:11px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);overflow-wrap:anywhere}
.subs{display:flex;flex-direction:column;gap:2px}
.sub{display:flex;align-items:center;gap:8px;width:100%;text-align:left;border:0;background:none;padding:8px 10px;border-radius:7px;font-weight:500}
.sub:hover{background:var(--ground)}
.sub[aria-current="true"]{background:var(--accent-soft);color:var(--ink)}
.sub[aria-current="true"] .count{color:var(--accent);border-color:var(--accent)}
.sub .nm{flex:1;overflow-wrap:anywhere}
.count{font-family:var(--f-mono);font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:10px;padding:0 7px;font-variant-numeric:tabular-nums}
.empty-sub{font-size:13px;color:var(--muted);padding:4px 10px}
.side-foot{display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--line);padding-top:14px}
.row{display:flex;gap:8px;flex-wrap:wrap}

.icon-btn{border:0;background:none;color:var(--muted);width:28px;height:28px;border-radius:6px;display:inline-grid;place-items:center;flex:none}
.icon-btn:hover{background:var(--ground);color:var(--ink)}
.icon-btn.danger:hover{color:var(--danger)}
.btn{border:1px solid var(--line);background:var(--panel);padding:7px 12px;border-radius:8px;font-weight:500;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{border-color:transparent;background:none;color:var(--muted)}
.btn.ghost:hover{color:var(--ink);background:var(--ground)}
.btn.block{width:100%;justify-content:center}

/* ---------- main ---------- */
.main{padding-block:28px 60px;padding-inline:clamp(16px,4vw,48px);min-width:0}
.topbar{display:none}
.crumb{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.head{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap;margin:6px 0 24px}
.head h1{font-family:var(--f-display);font-weight:700;font-size:clamp(24px,3.4vw,34px);letter-spacing:-.02em;line-height:1.1;margin:0;flex:1;min-width:0;text-wrap:balance;overflow-wrap:anywhere}
.list{display:flex;flex-direction:column;gap:14px;max-width:880px}

.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);overflow:hidden}
.card-head{display:flex;align-items:center;gap:8px;padding:8px 8px 8px 14px;border-bottom:1px solid var(--line)}
.slate{font-family:var(--f-mono);font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;flex:none}
.card-title{flex:1;min-width:0;font-weight:600;font-size:13px;letter-spacing:.06em;text-transform:uppercase;overflow-wrap:anywhere}
.path{display:block;font-weight:500;font-size:11px;letter-spacing:.04em;color:var(--muted)}
.tools{display:flex;align-items:center;gap:2px}
.copy{border:1px solid var(--line);background:var(--ground);border-radius:7px;padding:5px 10px;font-size:13px;font-weight:500;display:inline-flex;align-items:center;gap:6px;margin-left:4px}
.copy:hover{border-color:var(--accent);color:var(--accent)}
.copy.done{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.prompt{margin:0;padding:14px 16px;background:var(--code);font-family:var(--f-mono);font-size:13.5px;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere;max-height:320px;overflow:auto}
.card-foot{display:flex;justify-content:space-between;padding:6px 14px;font-family:var(--f-mono);font-size:11px;color:var(--muted);border-top:1px solid var(--line);font-variant-numeric:tabular-nums}

.blank{border:1.5px dashed var(--line);border-radius:10px;padding:32px 24px;text-align:center;color:var(--muted);max-width:880px;display:flex;flex-direction:column;align-items:center;gap:12px}
.blank strong{color:var(--ink);font-size:16px}
.note{font-size:12px;color:var(--muted);max-width:880px;margin-top:22px}
mark{background:var(--accent-soft);color:inherit;border-radius:2px}

/* ---------- dialog ---------- */
dialog{border:1px solid var(--line);border-radius:12px;padding:0;background:var(--panel);color:var(--ink);width:min(640px,calc(100vw - 32px));box-shadow:0 20px 60px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(10,15,18,.45)}
.dlg{display:flex;flex-direction:column;gap:14px;padding:22px}
.dlg h2{font-family:var(--f-display);font-size:18px;font-weight:500;margin:0}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.field input,.field textarea{border:1px solid var(--line);border-radius:8px;padding:9px 12px;background:var(--ground)}
.field textarea{font-family:var(--f-mono);font-size:13.5px;min-height:220px;resize:vertical;line-height:1.6}
.hint{font-size:12px;color:var(--muted)}
.dlg-actions{display:flex;justify-content:flex-end;gap:8px}

.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);background:var(--ink);color:var(--ground);padding:9px 16px;border-radius:8px;font-size:14px;opacity:0;pointer-events:none;transition:.2s}
.toast.show{opacity:1;transform:translate(-50%,0)}
.scrim{display:none}

/* ---------- landing ---------- */
.home{min-height:100%;display:flex;background-color:var(--ground);background-image:radial-gradient(var(--line) 1px,transparent 1.2px);background-size:22px 22px;background-position:-11px -11px}
.home-in{flex:1;display:flex;flex-direction:column;width:100%;max-width:1180px;margin:0 auto;padding-inline:clamp(16px,5vw,64px);padding-block:24px 40px}
.home-nav{display:flex;align-items:center;justify-content:space-between;gap:12px}
.hero{flex:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:center;gap:clamp(32px,6vw,96px);padding-block:40px 6vh}
.hero-text{display:flex;flex-direction:column;align-items:flex-start;gap:22px}
.hero h1{font-family:var(--f-display);font-weight:700;font-size:clamp(36px,5.2vw,68px);line-height:1;letter-spacing:-.04em;margin:0;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--accent)}
.lead{font-size:18px;color:var(--muted);max-width:40ch;margin:0 0 6px}
.btn.lg{padding:13px 24px;font-size:15px;border-radius:10px;box-shadow:0 6px 18px -6px color-mix(in srgb,var(--accent) 60%,transparent)}

.stack{position:relative;height:392px;width:100%;max-width:480px;justify-self:end}
.ic{position:absolute;left:0;right:0;height:250px;border:1px solid var(--line);border-radius:4px 14px 14px 14px;background:color-mix(in srgb,var(--panel) 55%,var(--ground));box-shadow:0 1px 2px rgba(15,30,35,.05);transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.ic .tab{position:absolute;bottom:100%;margin-bottom:-1px;height:30px;padding:6px 14px;border:1px solid var(--line);border-bottom:0;border-radius:9px 9px 0 0;background:inherit;font-family:var(--f-mono);font-size:12px;color:var(--muted);white-space:nowrap}
.c1{top:30px;margin-inline:36px}.c1 .tab{right:0}
.c2{top:68px;margin-inline:24px}.c2 .tab{right:22%}
.c3{top:106px;margin-inline:12px}.c3 .tab{left:22%}
.c4{top:142px;background:var(--panel);box-shadow:0 2px 4px rgba(15,30,35,.05),0 30px 60px -18px rgba(15,30,35,.25)}
.c4 .tab{left:0;color:var(--ink);font-weight:500}
.c4 .tab::after{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-left:8px;vertical-align:middle}
.stack:hover .c1{transform:translateY(-10px)}
.stack:hover .c2{transform:translateY(-6px)}
.stack:hover .c3{transform:translateY(-3px)}
.ic-body{height:100%;display:flex;flex-direction:column;gap:22px;padding:22px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{font-size:12px;padding:3px 10px;border-radius:20px;border:1px solid var(--line);color:var(--muted)}
.chip.on{background:var(--accent-soft);border-color:transparent;color:var(--ink);font-weight:500}
.bars{display:flex;flex-direction:column;gap:11px}
.bars i{display:block;height:8px;border-radius:4px;background:color-mix(in srgb,var(--line) 75%,var(--ground))}
.ic-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between}
.dots{display:flex;gap:5px}
.dots b{width:18px;height:4px;border-radius:2px;background:var(--line)}
.dots b:first-child{background:var(--accent)}
.pill{font-size:12px;font-weight:500;padding:5px 12px;border-radius:7px;background:var(--accent);color:var(--accent-ink)}
@media (max-width:820px){
  .hero{grid-template-columns:1fr;padding-block:32px 16px}
  .stack{justify-self:center;height:340px;max-width:380px}
  .ic{height:210px}
  .ic-body{gap:16px;padding:18px}
}
@media (prefers-reduced-motion:reduce){.ic{transition:none}}
.brand.link{border:0;background:none;padding:0;text-align:left;color:inherit}

@media (max-width:820px){
  .app{grid-template-columns:1fr}
  .side{position:fixed;inset:0 auto 0 0;width:min(300px,86vw);z-index:20;transform:translateX(-102%);transition:transform .2s;padding-top:calc(20px + env(safe-area-inset-top,0px));height:100%}
  .app.open .side{transform:none}
  .app.open .scrim{display:block;position:fixed;inset:0;background:rgba(10,15,18,.4);z-index:15}
  .topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}
  .tools .icon-btn.mv{display:none}
  .card-head{flex-wrap:wrap}
  .tools{margin-left:auto}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
@supports not (background: color-mix(in srgb, red, blue)){
  .btn.lg{box-shadow:0 6px 18px -6px rgba(11,127,116,.45)}
  .ic{background:var(--panel)}
  .bars i{background:var(--line)}
}