:root{
  --bg:#eaf5ff;
  --bg2:#f8fbff;
  --panel:rgba(255,255,255,.86);
  --panel-strong:rgba(255,255,255,.94);
  --panel-soft:rgba(255,255,255,.72);
  --line:#c6dcf3;
  --line-strong:#a7c9ec;
  --text:#101418;
  --muted:#5f7186;
  --accent:#2f80d9;
  --accent2:#2267b5;
  --accent-soft:#d9ebff;
  --danger:#d64545;
  --ok:#2ca56a;
  --warn:#d89b1f;
  --shadow:0 18px 45px rgba(72,108,145,.12);
  --shadow-soft:0 10px 25px rgba(72,108,145,.08);
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--text);
  background:
    linear-gradient(rgba(248,251,255,.68),rgba(248,251,255,.8)),
    url('/chatdad-cloud-bg.webp') center/cover fixed no-repeat,
    linear-gradient(180deg,var(--bg2),var(--bg));
}
button,input,textarea,select{font:inherit}
.hidden{display:none!important}
.muted{color:var(--muted)}
.error{color:var(--danger);min-height:1.25rem}
.primary,.ghost,.nav-btn{border:0;border-radius:14px;cursor:pointer;transition:all .18s ease}
.primary{background:var(--accent);color:#fff;font-weight:700;padding:.78rem 1rem;box-shadow:var(--shadow-soft)}
.primary:hover{background:var(--accent2);transform:translateY(-1px)}
.ghost{background:transparent;color:var(--muted);padding:.6rem .8rem}
.ghost:hover,.nav-btn:hover{background:rgba(217,235,255,.8);color:var(--text)}
.full{width:100%}
.login-shell{min-height:100%;display:grid;place-items:center;padding:28px}
.login-card{width:min(430px,100%);background:var(--panel-strong);border:1px solid rgba(255,255,255,.55);backdrop-filter:blur(12px);border-radius:24px;padding:34px;box-shadow:var(--shadow)}
.login-card h1{margin:.65rem 0 0;font-size:2.1rem;color:var(--text)}
.login-card p{margin:.3rem 0 1.5rem}
.login-card label{display:grid;gap:.45rem;margin:1rem 0;color:var(--muted)}
input,textarea,select{background:rgba(255,255,255,.88);color:var(--text);border:1px solid var(--line);border-radius:14px;padding:.82rem;outline:none}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,128,217,.12)}
.login-card .primary{width:100%;margin-top:.5rem}
.brand-mark{display:grid;place-items:center;width:64px;height:64px;border-radius:18px;background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.65);box-shadow:var(--shadow-soft)}
.brand-mark.small{width:42px;height:42px;border-radius:14px}
.brand-mark img{width:100%;height:100%;object-fit:contain;border-radius:inherit;display:block}
.app-shell{height:100%;display:grid;grid-template-columns:300px 1fr;gap:18px;padding:18px}
.sidebar,.main-panel{min-height:0;background:var(--panel);border:1px solid rgba(255,255,255,.55);backdrop-filter:blur(12px);box-shadow:var(--shadow)}
.sidebar{border-radius:28px;padding:18px;display:flex;flex-direction:column}
.brand-row{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.brand-row>div:last-child{display:flex;flex-direction:column}
.brand-row strong{font-size:1.15rem}
.brand-row span{font-size:.74rem;color:var(--muted)}
.main-nav{display:grid;gap:6px;margin:12px 0 16px}
.nav-btn{text-align:left;padding:.8rem .88rem;background:transparent;color:var(--text);font-weight:600}
.nav-btn.active{background:var(--accent-soft);color:var(--accent2)}
.history-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:10px 8px 8px}
.conversation-list{overflow:auto;display:grid;gap:6px;min-height:0;padding-right:4px}
.conversation-item{display:flex;align-items:center;gap:6px;border-radius:14px;background:rgba(255,255,255,.42)}
.conversation-item button:first-child{flex:1;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;background:transparent;border:0;color:var(--text);padding:.75rem .8rem;cursor:pointer}
.conversation-item.active{background:var(--accent-soft)}
.conversation-delete{background:transparent;border:0;color:var(--muted);cursor:pointer;padding:6px 8px}
.sidebar-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:14px;display:flex;align-items:center;justify-content:space-between;font-size:.84rem;gap:8px}
.main-panel{display:grid;grid-template-rows:68px 1fr;border-radius:32px;overflow:hidden}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:0 22px;background:rgba(255,255,255,.45);border-bottom:1px solid rgba(198,220,243,.65)}
#viewTitle{font-size:1.1rem;font-weight:700}
.status-group{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.82rem}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--danger);box-shadow:0 0 0 3px rgba(214,69,69,.12)}
.status-dot.ok{background:var(--ok);box-shadow:0 0 0 3px rgba(44,165,106,.12)}
.status-dot.warn{background:var(--warn);box-shadow:0 0 0 3px rgba(216,155,31,.12)}
.mobile-only{display:none}
.panel{min-height:0}
.chat-panel{display:grid;grid-template-rows:1fr auto;background:transparent}
.messages{overflow:auto;padding:28px max(24px,calc((100% - 940px)/2));display:flex;flex-direction:column;gap:22px}
.empty-state{text-align:center;color:var(--muted);margin:auto;background:rgba(255,255,255,.44);padding:30px 34px;border-radius:28px;backdrop-filter:blur(6px)}
.empty-state h2{color:var(--text);font-size:2rem;margin-bottom:.25rem}
.message{display:grid;gap:7px}
.message.user{align-self:flex-end;max-width:min(760px,88%)}
.message.assistant{align-self:stretch;max-width:900px}
.message .role{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.07em;font-weight:700}
.bubble{background:var(--panel-strong);border:1px solid rgba(255,255,255,.65);border-radius:20px;padding:15px 17px;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:var(--shadow-soft)}
.user .bubble{background:#e3f0ff;border-color:#c6dcf3}
.sources{display:flex;flex-wrap:wrap;gap:6px}
.source-chip{font-size:.72rem;color:var(--accent2);background:#edf5ff;border:1px solid #cfe1f5;border-radius:999px;padding:4px 8px}
.composer-wrap{border-top:1px solid rgba(198,220,243,.65);background:rgba(255,255,255,.45);padding:12px max(16px,calc((100% - 940px)/2)) 18px}
.composer-tools{display:flex;justify-content:flex-end;margin-bottom:8px}
.toggle{display:flex;align-items:center;gap:7px;font-size:.84rem;color:var(--muted)}
.composer{display:grid;grid-template-columns:1fr auto;gap:10px}
.composer textarea{resize:none;max-height:180px;min-height:50px;background:rgba(255,255,255,.92)}
.composer .primary{align-self:end;height:50px}
.content-panel{overflow:auto;padding:30px max(24px,calc((100% - 1000px)/2))}
.section-head h2{margin:0;font-size:1.72rem;color:var(--text)}
.section-head p{margin:.35rem 0 1.25rem;color:var(--muted)}
.upload-card,.inline-form,.card,.list-card{background:var(--panel-strong);border:1px solid rgba(255,255,255,.65);box-shadow:var(--shadow-soft)}
.upload-card,.inline-form,.card{border-radius:18px;padding:15px}
.upload-card,.inline-form{display:flex;gap:10px;align-items:center}
.upload-card input,.inline-form input{flex:1}
.card-list{display:grid;gap:12px;margin-top:16px}
.list-card{border-radius:18px;padding:14px 15px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.list-card .meta{min-width:0}
.list-card .title{font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}
.list-card .sub{font-size:.8rem;color:var(--muted);margin-top:4px}
.list-card .actions{display:flex;gap:6px}
.danger{color:var(--danger)!important}
.admin-grid{display:grid;grid-template-columns:1.2fr 1.3fr 1.5fr .7fr auto;gap:8px}
.badge{display:inline-block;font-size:.72rem;padding:3px 8px;border-radius:999px;background:#edf5ff;color:var(--accent2);border:1px solid #d6e8fb}
.badge.ok{background:#eaf8f1;color:#1d7f52;border-color:#ccecd9}.badge.warn{background:#fff6de;color:#a36b00;border-color:#f4e5ac}.badge.error{background:#ffebeb;color:#b93a3a;border-color:#f5cccc}
@media(max-width:800px){
  .app-shell{grid-template-columns:1fr;padding:12px;gap:12px}
  .sidebar{position:fixed;z-index:20;inset:12px auto 12px 12px;width:min(320px,88vw);transform:translateX(-105%);transition:.2s;box-shadow:var(--shadow)}
  .sidebar.open{transform:translateX(0)}
  .mobile-only{display:inline-block}
  .messages{padding:18px 12px}
  .composer-wrap{padding:10px 12px 14px}
  .content-panel{padding:20px 12px}
  .upload-card,.inline-form{align-items:stretch;flex-direction:column}
  .admin-grid{grid-template-columns:1fr}
  .status-group span:nth-of-type(even){display:none}
  .message.user{max-width:94%}
}
.composer-tools{flex-wrap:wrap;justify-content:flex-start;align-items:center;gap:10px 18px}
.stop-button{align-self:end;height:50px;background:#fff1f1;color:#a92222;border:1px solid #f3baba;font-weight:700}
.stop-button:hover{background:#ffe1e1;color:#8e1818}
.composer{grid-template-columns:minmax(0,1fr) auto auto}
@media(max-width:600px){.composer-tools{gap:8px 12px}.toggle{font-size:.78rem}.compact-select{max-width:112px}}