:root{
  --bg:#0b0c14; --bg2:#12141f; --panel:#161927; --panel2:#1d2131; --line:#2a2f42;
  --txt:#e9ecf5; --mut:#9aa1bb; --accent:#7c5cff; --accent2:#56b4ff; --ok:#3ddc97;
  --err:#ff6b6b; --radius:14px; --shadow:0 10px 40px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
[hidden]{display:none!important}   /* the HTML hidden attribute must always win over display rules */
html,body{margin:0;height:100%;background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,system-ui,sans-serif;
  -webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}
a{color:var(--accent2);text-decoration:none}
.muted{color:var(--mut)}
.err{color:var(--err);font-size:.9rem}

/* buttons */
.btn{border:1px solid var(--line);background:var(--panel2);color:var(--txt);
  padding:.7rem 1rem;border-radius:12px;font-weight:600;font-size:.95rem;transition:.15s}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:#fff}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent}
.btn.block{display:block;width:100%;text-align:center}
.btn.danger{color:var(--err);border-color:#3a2130}
.icon-btn{background:transparent;border:none;color:var(--txt);font-size:1.3rem;padding:.3rem .5rem;border-radius:10px}
.icon-btn:hover{background:var(--panel2)}

/* ---------- auth ---------- */
body.auth{display:grid;place-items:center;padding:1.2rem;
  background:radial-gradient(1200px 600px at 50% -10%,#1a1d33,transparent),var(--bg)}
.auth-card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);
  border-radius:20px;padding:1.8rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.85rem}
.auth-card .brand{display:flex;align-items:center;gap:.5rem;justify-content:center}
.auth-card h1{font-size:1.5rem;margin:0}
.auth-card .tag{text-align:center;color:var(--mut);margin:.1rem 0 .6rem;font-size:.9rem}
.auth-card label{display:flex;flex-direction:column;gap:.35rem;font-size:.85rem;color:var(--mut)}
.auth-card input{background:var(--bg2);border:1px solid var(--line);border-radius:12px;
  padding:.8rem .9rem;color:var(--txt);font-size:1rem}
.auth-card input:focus{outline:none;border-color:var(--accent)}
.logo{font-size:1.6rem}
.pw-wrap{position:relative;display:flex;align-items:center}
.pw-wrap input{width:100%;padding-right:2.6rem}
.pw-eye{position:absolute;right:.4rem;background:transparent;border:none;font-size:1.1rem;
  opacity:.55;padding:.3rem}
.pw-eye.on{opacity:1}

/* ---------- app shell ---------- */
.shell{display:grid;grid-template-columns:290px 1fr;height:100dvh}
.topbar{display:none}
.sidebar{background:var(--bg2);border-right:1px solid var(--line);display:flex;flex-direction:column;
  padding:1rem;gap:.8rem;min-height:0}
.brand{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;padding:.2rem}
.nav{display:flex;flex-direction:column;gap:.2rem}
.nav-item{text-align:left;background:transparent;border:none;color:var(--mut);padding:.6rem .7rem;
  border-radius:10px;font-size:.95rem;font-weight:600}
.nav-item:hover{background:var(--panel)}
.nav-item.active{background:var(--panel2);color:var(--txt)}
.chat-list-wrap{flex:1;overflow-y:auto;min-height:0}
.section-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--mut);
  padding:.6rem .5rem .3rem}
.chat-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.chat-list li{display:flex;align-items:center;gap:.4rem;padding:.55rem .6rem;border-radius:10px;
  color:var(--txt);font-size:.9rem;cursor:pointer}
.chat-list li:hover{background:var(--panel)}
.chat-list li.active{background:var(--panel2)}
.chat-list li .t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-foot{display:flex;flex-direction:column;gap:.5rem;border-top:1px solid var(--line);padding-top:.7rem}
.whoami{font-size:.82rem;color:var(--mut);padding:0 .3rem}
.whoami .badge{background:var(--panel2);border-radius:6px;padding:.05rem .4rem;font-size:.7rem;margin-left:.3rem}
.impersonate{background:#2a2130;color:#ffd27a;border-radius:8px;padding:.4rem .5rem;font-size:.78rem;margin-top:.3rem}

/* main */
.main{position:relative;min-height:0;overflow:hidden;display:flex;flex-direction:column}
.view{display:none;flex:1;min-height:0;flex-direction:column;overflow-y:auto;padding:1.2rem}
.view.active{display:flex}
#view-chat{padding:0}
.view-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.view-head h2{margin:0;font-size:1.3rem}

/* chat */
.messages{flex:1;overflow-y:auto;padding:1.2rem;display:flex;flex-direction:column;gap:1rem}
.empty-hero{margin:auto;max-width:520px;text-align:center;color:var(--mut)}
.empty-hero h2{color:var(--txt);font-size:1.5rem}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-top:1rem}
.chip{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:20px;
  padding:.5rem .9rem;font-size:.85rem}
.chip:hover{border-color:var(--accent)}
.msg{max-width:min(760px,92%);padding:.85rem 1rem;border-radius:16px;line-height:1.5;font-size:.96rem;
  white-space:pre-wrap;word-wrap:break-word}
.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;
  border-bottom-right-radius:4px}
.msg.assistant{align-self:flex-start;background:var(--panel);border:1px solid var(--line);
  border-bottom-left-radius:4px}
.msg.assistant b{color:#fff}
.msg .dl-row{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.6rem}
.msg .dl{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:.4rem .7rem;
  font-size:.82rem;color:var(--accent2)}
.render-card{align-self:flex-start;max-width:min(760px,92%);width:100%;background:var(--panel);
  border:1px solid var(--line);border-radius:16px;padding:1rem}
.render-card .bar{height:6px;background:var(--panel2);border-radius:4px;overflow:hidden;margin:.6rem 0}
.render-card .bar i{display:block;height:100%;width:35%;background:linear-gradient(90deg,var(--accent),var(--accent2));
  animation:slide 1.4s infinite}
@keyframes slide{0%{margin-left:-40%}100%{margin-left:100%}}
.render-log{font-size:.8rem;color:var(--mut);max-height:120px;overflow-y:auto;margin-top:.4rem}
.render-card video{width:100%;border-radius:12px;margin-top:.6rem}

.composer{display:flex;align-items:flex-end;gap:.5rem;padding:.8rem;border-top:1px solid var(--line);
  background:var(--bg2)}
.composer textarea{flex:1;resize:none;max-height:160px;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:.8rem .9rem;color:var(--txt);font-size:1rem;line-height:1.4}
.composer textarea:focus{outline:none;border-color:var(--accent)}
.send{padding:.7rem 1.05rem;font-size:1.05rem;border-radius:14px}

/* grids / cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1rem}
.pcard video,.pcard .thumb{width:100%;border-radius:10px;background:#000;aspect-ratio:16/9;object-fit:cover}
.pcard .thumb{display:grid;place-items:center;color:var(--mut);font-size:2rem}
.pcard .row{display:flex;align-items:center;justify-content:space-between;margin-top:.6rem;gap:.5rem}
.pcard h3{margin:.5rem 0 0;font-size:1rem}
.status{font-size:.72rem;padding:.15rem .5rem;border-radius:6px;background:var(--panel2);color:var(--mut)}
.status.done{color:var(--ok)} .status.rendering{color:var(--accent2)} .status.error{color:var(--err)}
.card-actions{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.6rem}
.card-actions .btn{padding:.5rem .75rem;font-size:.85rem}

/* library extras */
.lib-sub{margin:-.4rem 0 1rem;font-size:.88rem}
.pcard h3{word-break:break-word}
.meta-block{margin-top:.7rem;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:.6rem .7rem}
.meta-label{font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;color:var(--mut);margin-bottom:.3rem}
.meta-text{margin:0 0 .5rem;font-size:.9rem;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.meta-text.tags,.parts .meta-label{color:var(--accent2)}
.btn.tiny{padding:.35rem .6rem;font-size:.78rem;border-radius:8px}
.parts{margin-top:.7rem}
.parts .dl-row{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.4rem}
.parts .dl{background:var(--panel2);border:1px solid var(--line);border-radius:9px;padding:.4rem .7rem;
  font-size:.82rem;color:var(--accent2)}
.parts .dl:hover{border-color:var(--accent)}

/* worker list */
.list{display:flex;flex-direction:column;gap:.6rem}
.worker{display:flex;align-items:center;gap:.8rem;background:var(--panel);border:1px solid var(--line);
  border-radius:12px;padding:.8rem 1rem}
.worker .av{width:38px;height:38px;border-radius:50%;background:var(--panel2);display:grid;place-items:center;font-weight:700}
.worker .who{flex:1;min-width:0}
.worker .who b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.worker .who span{font-size:.8rem;color:var(--mut)}

/* forms */
.form{max-width:460px;display:flex;flex-direction:column;gap:.9rem}
.form label{display:flex;flex-direction:column;gap:.35rem;font-size:.82rem;color:var(--mut)}
.form input,.form textarea{background:var(--bg2);border:1px solid var(--line);border-radius:12px;
  padding:.75rem .9rem;color:var(--txt);font-size:1rem}
.form input:focus{outline:none;border-color:var(--accent)}

/* 3-dot menu */
.dots{background:transparent;border:none;color:var(--mut);font-size:1.2rem;padding:.2rem .5rem;border-radius:8px}
.dots:hover{background:var(--panel2);color:var(--txt)}
.menu-pop{position:fixed;z-index:60;background:var(--panel2);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:.35rem;min-width:170px}
.menu-pop button{display:block;width:100%;text-align:left;background:transparent;border:none;color:var(--txt);
  padding:.55rem .7rem;border-radius:8px;font-size:.9rem}
.menu-pop button:hover{background:var(--panel)}
.menu-pop button.danger{color:var(--err)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:grid;place-items:center;z-index:70;padding:1rem}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;width:100%;max-width:440px;
  padding:1.2rem;box-shadow:var(--shadow)}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.9rem}
.modal-body-form{display:flex;flex-direction:column;gap:.8rem}
.modal-body-form label{display:flex;flex-direction:column;gap:.3rem;font-size:.82rem;color:var(--mut)}
.modal-body-form input{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:.7rem;color:var(--txt)}

.scrim{display:none}
.toast{position:fixed;bottom:1rem;left:50%;transform:translateX(-50%);background:var(--panel2);
  border:1px solid var(--line);color:var(--txt);padding:.7rem 1.1rem;border-radius:12px;z-index:90;box-shadow:var(--shadow)}

/* ---------- mobile ---------- */
@media (max-width:820px){
  .shell{grid-template-columns:1fr}
  .topbar{display:flex;align-items:center;justify-content:space-between;padding:.5rem .7rem;
    background:var(--bg2);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
  .topbar-title{font-weight:700}
  .sidebar{position:fixed;inset:0 auto 0 0;width:82%;max-width:320px;z-index:50;transform:translateX(-105%);
    transition:transform .25s ease}
  .sidebar.open{transform:translateX(0)}
  .scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:45;opacity:0;
    pointer-events:none;transition:.25s}
  .scrim.show{opacity:1;pointer-events:auto}
  .view{padding:1rem}
  .msg{max-width:90%}
  .grid{grid-template-columns:1fr 1fr}
}
@media (max-width:520px){ .grid{grid-template-columns:1fr} }