:root{
  /* ---- theme TỐI (mặc định) ---- */
  --bg:#212121;--sb:#171717;--bd:#383838;--tx:#ececec;--mut:#9a9a9a;
  --ub:#2f2f2f;--ac:#10a37f;--code:#101010;--err:#e5484d;--warn:#f5d576;--warn-bd:#6b5a1e;
  --hover:#262626;--active:#2f2f2f;--chip-bg:#1b1b1b;
  --danger-tx:#f1b0b3;--danger-bd:#5c2b2d;--danger-bg:#3a2022;
  --ok-tx:#7ee2a8;--ok-bd:#2c5c43;
  --link:#7ab7ff;--code-chip:#0d0d0d;--codehead:#1a1a1a;
  --toolcard:#191919;--toolhead-hover:#222222;
  --input-bg:#2f2f2f;--panel-bg:#1b1b1b;--field-bg:#1a1a1a;
  --mini-hover:#333333;--frame-bg:#0d0d0d;--modal-bg:#262626;
  --toast-bg:#111111;--toast-tx:#ececec;
  --login-grad:radial-gradient(1200px 600px at 50% -100px,#0d3b2e 0%,#171717 55%);
  --login-card:#1f1f1f;--login-input:#161616;
  --card:#1b1b1b;--tbl-bd:#2a2a2a;--ver:#666666;
  --switch-off:#3a3a3a;--switch-knob:#ffffff;--accent-fg:#ffffff;
}
[data-theme="light"]{
  /* ---- theme SÁNG ---- */
  --bg:#ffffff;--sb:#f7f7f8;--bd:#e3e3e3;--tx:#0d0d0d;--mut:#6f6f6f;
  --ub:#f1f1f3;--ac:#0f9d78;--code:#f6f8fa;--err:#d1242f;--warn:#9a6700;--warn-bd:#e0c384;
  --hover:#ececee;--active:#e8e8ea;--chip-bg:#f1f1f2;
  --danger-tx:#c22733;--danger-bd:#f0b6ba;--danger-bg:#fdebec;
  --ok-tx:#116329;--ok-bd:#b7e2c4;
  --link:#0969da;--code-chip:#eef0f2;--codehead:#f0f0f1;
  --toolcard:#f6f6f7;--toolhead-hover:#efeff1;
  --input-bg:#f1f1f3;--panel-bg:#f7f7f8;--field-bg:#ffffff;
  --mini-hover:#e9e9eb;--frame-bg:#ffffff;--modal-bg:#ffffff;
  --toast-bg:#1f2328;--toast-tx:#f2f2f2;
  --login-grad:radial-gradient(1200px 600px at 50% -100px,#d8f1e6 0%,#f7f7f8 55%);
  --login-card:#ffffff;--login-input:#f4f4f5;
  --card:#ffffff;--tbl-bd:#ececec;--ver:#9a9a9a;
  --switch-off:#c9c9cc;--switch-knob:#ffffff;--accent-fg:#ffffff;
}
body,#sidebar,#topbar,.chip,.card,.toolcard,.inputbox,#previewPanel,.login-card,.tab,.codeblock,.modalbox,.tbl td,.badge,.mini,.sug,.bubble,.ac code{transition:background-color .18s ease,color .18s ease,border-color .18s ease}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;display:flex;font-family:ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--tx);overflow:hidden;font-size:15px}
button{font-family:inherit}
/* ---------- layout ---------- */
#sidebar{width:264px;min-width:264px;background:var(--sb);border-right:1px solid var(--bd);display:flex;flex-direction:column}
.side-head{padding:12px}
.btn-new{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--bd);background:transparent;color:var(--tx);cursor:pointer;font-size:14px;text-align:left}
.btn-new:hover{background:var(--hover)}
#chatList{flex:1;overflow-y:auto;padding:4px 8px}
.chatitem{display:flex;align-items:center;gap:6px;padding:9px 10px;border-radius:8px;cursor:pointer;font-size:14px}
.chatitem:hover{background:var(--hover)}
.chatitem.active{background:var(--active)}
.ctitle{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cdel{border:0;background:transparent;color:var(--mut);cursor:pointer;opacity:0;padding:2px 4px;border-radius:4px}
.chatitem:hover .cdel{opacity:1}
.cdel:hover{color:var(--err)}
.side-foot{padding:10px 12px;border-top:1px solid var(--bd)}
.btn-ghost{width:100%;padding:9px 10px;border-radius:8px;border:0;background:transparent;color:var(--tx);cursor:pointer;font-size:14px;text-align:left}
.btn-ghost:hover{background:var(--hover)}
.ver{color:var(--ver);font-size:11px;margin-top:8px;padding-left:4px}
#main{flex:1;display:flex;flex-direction:column;min-width:0}
#topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--bd);gap:10px;flex-wrap:wrap}
#brand{font-weight:600;font-size:16px}
#brand .sub{color:var(--mut);font-weight:400;font-size:12px;margin-left:6px}
.top-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip{font-size:12px;padding:5px 10px;border-radius:999px;border:1px solid var(--bd);color:var(--mut);background:var(--chip-bg);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip-danger{cursor:pointer;color:var(--danger-tx);border-color:var(--danger-bd)}
.chip-danger:hover{background:var(--danger-bg)}
.sb-ready{color:var(--ok-tx);border-color:var(--ok-bd)}
.sb-creating,.sb-starting,.sb-installing{color:var(--warn);border-color:var(--warn-bd)}
.sb-error{color:var(--danger-tx);border-color:var(--danger-bd)}
.sb-stopped{color:var(--warn);border-color:var(--warn-bd)}
.sb-stopping{color:var(--warn);border-color:var(--warn-bd)}
.sb-click{cursor:pointer}
.sb-click:hover{background:var(--hover)}
.ttl{color:var(--warn);font-weight:600}
.net-toggle{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;font-size:13px}
.switch{position:relative;width:38px;height:22px;display:inline-block}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;inset:0;background:var(--switch-off);border-radius:999px;transition:.2s}
.slider:before{content:'';position:absolute;width:16px;height:16px;border-radius:50%;background:var(--switch-knob);top:3px;left:3px;transition:.2s}
.switch input:checked + .slider{background:var(--ac)}
.switch input:checked + .slider:before{transform:translateX(16px)}
/* ---------- messages ---------- */
#messages{flex:1;overflow-y:auto;padding:24px 0 8px}
.msg{max-width:820px;margin:0 auto 20px;padding:0 20px;display:flex;gap:12px}
.msg.user{justify-content:flex-end}
.msg.user .bubble{background:var(--ub);padding:10px 16px;border-radius:18px;max-width:80%;white-space:pre-wrap;word-wrap:break-word}
.msg.error .bubble{background:var(--danger-bg);padding:10px 16px;border-radius:12px;max-width:80%}
.avatar{width:30px;height:30px;min-width:30px;border-radius:50%;background:linear-gradient(135deg,#10a37f,#0d7a61);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff;margin-top:2px}
.abody{min-width:0;flex:1}
.ac{line-height:1.65;word-wrap:break-word}
.ac p{margin:8px 0}
.ac h2,.ac h3,.ac h4{margin:14px 0 8px}
.ac ul,.ac ol{margin:8px 0;padding-left:24px}
.ac a{color:var(--link)}
.ac blockquote{border-left:3px solid var(--bd);margin:8px 0;padding:2px 12px;color:var(--mut)}
.ac table{border-collapse:collapse;margin:10px 0}
.ac th,.ac td{border:1px solid var(--bd);padding:6px 10px}
.ac code{background:var(--code-chip);padding:2px 6px;border-radius:6px;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.codeblock{margin:12px 0;border:1px solid var(--bd);border-radius:10px;overflow:hidden;background:var(--code)}
.codehead{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;background:var(--codehead);font-size:12px;color:var(--mut)}
.copybtn{border:1px solid var(--bd);background:transparent;color:var(--mut);border-radius:6px;padding:2px 10px;cursor:pointer;font-size:12px}
.copybtn:hover{color:var(--accent-fg)}
.codeblock pre{margin:0;padding:12px;overflow-x:auto}
.codeblock pre code{background:transparent;padding:0;font-size:13px;line-height:1.5}
/* ---------- tool cards ---------- */
.toolcard{border:1px solid var(--bd);border-radius:12px;margin:10px 0;background:var(--toolcard);overflow:hidden}
.toolcard.err{border-color:var(--danger-bd)}
.toolhead{display:flex;justify-content:space-between;gap:10px;padding:9px 12px;cursor:pointer;font-size:13px;align-items:center}
.toolhead:hover{background:var(--toolhead-hover)}
.tstatus{color:var(--mut);font-size:12px;white-space:nowrap}
.toolcard.done .tstatus{color:var(--ok-tx)}
.toolcard.err .tstatus{color:var(--danger-tx)}
.toolbody{display:none;padding:0 12px 12px}
.toolcard.open .toolbody{display:block}
.tlabel{font-size:11px;color:var(--mut);margin:8px 0 4px;text-transform:uppercase;letter-spacing:.5px}
.targs,.tout{background:var(--code);border:1px solid var(--bd);border-radius:8px;padding:10px;font-size:12.5px;overflow-x:auto;white-space:pre-wrap;word-break:break-word;max-height:320px;overflow-y:auto;margin:0}
.think{margin:0 0 10px;border:1px dashed var(--bd);border-radius:10px;padding:6px 12px;font-size:13px}
.think summary{cursor:pointer;color:var(--mut);font-size:12px}
.thinkc{color:var(--mut);white-space:pre-wrap;margin-top:6px;max-height:200px;overflow-y:auto}
/* ---------- input ---------- */
#inputArea{padding:10px 20px 14px}
.inputbox{max-width:820px;margin:0 auto;display:flex;gap:8px;align-items:flex-end;background:var(--input-bg);border:1px solid var(--bd);border-radius:24px;padding:8px 8px 8px 18px}
#input{flex:1;background:transparent;border:0;outline:0;resize:none;color:var(--tx);font-size:15px;font-family:inherit;max-height:200px;line-height:1.4}
#btnSend{width:38px;height:38px;min-width:38px;border-radius:50%;border:0;background:var(--ac);color:var(--accent-fg);font-size:16px;cursor:pointer}
#btnSend:hover{filter:brightness(1.1)}
.disclaimer{text-align:center;color:var(--ver);font-size:11.5px;margin-top:8px}
#welcome{display:flex;align-items:center;justify-content:center;height:100%}
.hero{max-width:640px;padding:20px;text-align:center}
.hero-title{font-size:26px;font-weight:600;margin-bottom:22px}
.sugs{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.sug{padding:14px;border-radius:12px;border:1px solid var(--bd);background:transparent;color:var(--tx);cursor:pointer;font-size:14px;text-align:left}
.sug:hover{background:var(--hover)}
/* ---------- preview panel ---------- */
#previewPanel{display:none;border-top:1px solid var(--bd);background:var(--panel-bg);padding:10px 20px}
#previewPanel.open{display:block}
.pp-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.pp-head label{font-size:13px;color:var(--mut)}
.pp-head input{width:90px;padding:6px 10px;border-radius:8px;border:1px solid var(--bd);background:var(--field-bg);color:var(--tx);font-size:13px;outline:0}
.mini{padding:7px 14px;border-radius:8px;border:1px solid var(--bd);background:transparent;color:var(--tx);cursor:pointer;font-size:13px}
.mini:hover{background:var(--mini-hover)}
.mini.primary{background:var(--ac);border-color:var(--ac);color:var(--accent-fg)}
.mini.primary:hover{filter:brightness(1.1)}
#previewFrame{width:100%;height:380px;border:1px solid var(--bd);border-radius:10px;background:var(--frame-bg)}
.pp-status{font-size:12px;color:var(--mut);margin-top:6px}
/* ---------- modal ---------- */
#modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:50}
.modalbox{background:var(--modal-bg);border:1px solid var(--bd);border-radius:16px;padding:22px;width:480px;max-width:92vw;max-height:90vh;overflow-y:auto}
.modalbox h3{margin:0 0 14px}
.fgroup{margin-bottom:14px}
.fgroup label{display:block;font-size:12.5px;color:var(--mut);margin:10px 0 4px}
.fgroup input,.fgroup select{width:100%;padding:9px 12px;border-radius:8px;border:1px solid var(--bd);background:var(--field-bg);color:var(--tx);font-size:14px;outline:0}
.fgroup input:focus{border-color:var(--ac)}
.row{display:flex;gap:8px;align-items:center}
.row input{flex:1}
.primary{padding:8px 18px;border-radius:8px;border:0;background:var(--ac);color:var(--accent-fg);cursor:pointer;font-size:14px}
#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--toast-bg);color:var(--toast-tx);border:1px solid var(--bd);padding:10px 18px;border-radius:10px;font-size:13px;opacity:0;transition:opacity .3s;z-index:99;pointer-events:none;max-width:80vw}
/* ---------- login ---------- */
.login-wrap{display:flex;width:100%;height:100vh;height:100dvh;padding:72px 16px 24px;background:var(--login-grad);overflow-y:auto}
.login-card{width:380px;max-width:92vw;margin:auto;background:var(--login-card);border:1px solid var(--bd);border-radius:18px;padding:30px 28px}
.login-card h1{margin:0 0 4px;font-size:22px}
.login-card .sub{color:var(--mut);font-size:13px;margin-bottom:20px}
.login-card input{width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--bd);background:var(--login-input);color:var(--tx);font-size:14px;outline:0;margin-bottom:12px}
.login-card input:focus{border-color:var(--ac)}
.login-btn{width:100%;padding:11px;border-radius:10px;border:0;background:var(--ac);color:var(--accent-fg);font-size:15px;cursor:pointer}
.login-btn:hover{filter:brightness(1.1)}
.login-err{color:var(--danger-tx);font-size:13px;margin-bottom:10px;display:none}
.login-note{color:var(--ver);font-size:11.5px;margin-top:14px;text-align:center}
.login-tabs{display:flex;gap:4px;margin-bottom:16px;background:var(--login-input);border:1px solid var(--bd);border-radius:11px;padding:4px}
.cap-row{display:flex;gap:10px;align-items:center;margin-bottom:12px}
.cap-img{width:112px;height:42px;border-radius:8px;border:1px solid var(--bd);cursor:pointer;flex-shrink:0;background:#0f1420}
.cap-input{flex:1;min-width:0;padding:10px 12px;border-radius:10px;border:1px solid var(--bd);background:var(--login-input);color:var(--tx);font-size:16px;outline:0;letter-spacing:4px;text-transform:uppercase}
.cap-input:focus{border-color:var(--ac)}
.login-tab{flex:1;padding:8px 4px;border:0;border-radius:8px;background:transparent;color:var(--mut);font-size:14px;cursor:pointer;white-space:nowrap}
.login-tab.active{background:var(--ac);color:var(--accent-fg);font-weight:600}

/* ---------- admin ---------- */
.admin-wrap{flex:1;display:flex;flex-direction:column;min-width:0}
.admin-top{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--bd);flex-wrap:wrap;gap:8px}
.tabs{display:flex;gap:6px;padding:12px 20px 0;flex-wrap:wrap}
.tab{padding:8px 16px;border-radius:10px 10px 0 0;border:1px solid var(--bd);border-bottom:0;background:transparent;color:var(--mut);cursor:pointer;font-size:14px}
.tab.active{background:var(--card);color:var(--tx)}
.admin-body{flex:1;overflow-y:auto;padding:18px 20px}
.card{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:18px;margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:16px}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th{color:var(--mut);text-align:left;font-weight:500;padding:8px 10px;border-bottom:1px solid var(--bd)}
.tbl td{padding:9px 10px;border-bottom:1px solid var(--tbl-bd);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.badge{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--bd)}
.badge.admin{color:var(--warn);border-color:var(--warn-bd)}
.badge.ok{color:var(--ok-tx);border-color:var(--ok-bd)}
.badge.no{color:var(--danger-tx);border-color:var(--danger-bd)}
.inline-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.inline-form input,.inline-form select{padding:8px 12px;border-radius:8px;border:1px solid var(--bd);background:var(--field-bg);color:var(--tx);font-size:13px;outline:0}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
@media (max-width:900px){.ai-grid{grid-template-columns:1fr}}

.typing{display:flex;align-items:center;gap:6px;padding:8px 4px;color:var(--mut);font-size:13px}
.tdot{width:7px;height:7px;border-radius:50%;background:var(--mut);display:inline-block;animation:tbounce 1.2s infinite}
.tdot:nth-child(2){animation-delay:.15s}
.tdot:nth-child(3){animation-delay:.3s}
.tlbl{margin-left:4px}
@keyframes tbounce{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}
/* ---------- theme toggle ---------- */
.chip-btn{cursor:pointer}
.chip-btn:hover{background:var(--hover)}
.login-theme{position:fixed;top:16px;right:16px;z-index:10}
/* ================= RESPONSIVE ================= */
*{-webkit-tap-highlight-color:transparent}
img,iframe{max-width:100%}
/* --- login --- */
@media (max-width:480px){
  .login-card{width:100%;max-width:420px;padding:22px 18px;border-radius:14px}
  .login-card h1{font-size:19px}
  .login-card .sub{font-size:12px}
  .login-card input{padding:11px 12px;font-size:16px}
  .login-btn{font-size:14px}
  .login-theme{top:12px;right:12px}
}
/* --- chat: mobile drawer sidebar --- */
#btnMenu{display:none;border:1px solid var(--bd);background:transparent;color:var(--tx);border-radius:8px;font-size:18px;padding:4px 10px;cursor:pointer;line-height:1.2}
#sbBackdrop{display:none}
@media (max-width:900px){
  #sidebar{position:fixed;left:0;top:0;bottom:0;z-index:60;width:min(280px,82vw);min-width:0;
    transform:translateX(-105%);transition:transform .22s ease;box-shadow:4px 0 24px rgba(0,0,0,.35)}
  #sidebar.open{transform:translateX(0)}
  #sbBackdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:55;opacity:0;pointer-events:none;transition:opacity .22s}
  #sbBackdrop.show{opacity:1;pointer-events:auto}
  #btnMenu{display:inline-block}
  #messages{padding:14px 0 4px}
  .msg{padding:0 12px;margin-bottom:16px}
  .msg.user .bubble,.msg.error .bubble{max-width:88%}
  #inputArea{padding:8px 12px calc(10px + env(safe-area-inset-bottom))}
  .inputbox{border-radius:20px;padding-left:14px}
  #input{font-size:16px}
  #btnSend{width:36px;height:36px;min-width:36px}
  .hero-title{font-size:22px}
  .hero{padding:12px}
  #previewFrame{height:300px}
}
@media (max-width:760px){
  body{font-size:14px}
  #topbar{padding:8px 10px;gap:6px}
  #brand{font-size:14px}
  #brand .sub{display:none}
  .chip{max-width:150px;font-size:11.5px;padding:4px 8px}
  .net-toggle{font-size:12px}
  .net-toggle span:first-child{display:none}
  .sugs{grid-template-columns:1fr}
  .disclaimer{font-size:10.5px;padding:0 4px}
  .codeblock pre code,.ac code{font-size:12.5px}
  .modalbox{padding:16px}
}
/* --- admin --- */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tbl-wrap .tbl{min-width:560px}
@media (max-width:760px){
  .admin-top{padding:10px 12px}
  .admin-top #brand{font-size:14px}
  .admin-top #brand .sub{display:none}
  .tabs{padding:10px 12px 0;gap:4px}
  .tab{padding:7px 10px;font-size:13px}
  .admin-body{padding:12px}
  .card{padding:14px;border-radius:12px}
  .card h3{font-size:15px}
  .inline-form{flex-direction:column;align-items:stretch}
  .inline-form input,.inline-form select{width:100%!important;min-width:0;font-size:16px}
  .inline-form .mini{width:100%}
  .row{flex-direction:column;align-items:stretch}
  .row input{font-size:16px}
  .fgroup input,.fgroup select{font-size:16px}
  .ai-grid{gap:0 0}
}