:root{
  --ink:#0e0e10; --muted:#6b6b70; --line:#e6e6e9; --bg:#f5f4f2; --panel:#fff;
  --accent:#111; --accent-ink:#fff; --ok:#0a7d33; --bad:#b42318; --radius:14px;
  --font:'IBM Plex Sans Arabic',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
.muted{color:var(--muted)}
.brand{font-weight:700;letter-spacing:-.02em}
.brand span{color:var(--muted);font-weight:600}
.brand .tag,.tag{font-size:.7rem;background:var(--ink);color:#fff;padding:.15rem .45rem;border-radius:6px;margin-inline-start:.4rem;text-transform:uppercase;letter-spacing:.08em}

/* centered auth cards */
.centered{display:grid;place-items:center;padding:1.5rem}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:2rem;max-width:380px;width:100%}
.card h1{font-size:1.35rem;margin:.6rem 0 .3rem}
.stack{display:grid;gap:.7rem;margin-top:1.2rem}
input,textarea{font-family:inherit;font-size:1rem;padding:.8rem .9rem;border:1px solid var(--line);border-radius:10px;width:100%;background:#fff;color:var(--ink)}
button[type=submit],.send{background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:.8rem 1rem;font-weight:600}
.link{display:inline-block;margin-top:1rem;color:var(--ink)}
.ghost{background:transparent;border:1px solid var(--line);border-radius:8px;padding:.4rem .7rem;color:var(--ink)}

/* staff list */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.2rem;background:var(--panel);border-bottom:1px solid var(--line)}
.list{max-width:640px;margin:0 auto;padding:1.5rem 1.2rem}
.list h1{font-size:1.3rem}
.sites{display:grid;gap:.6rem;margin-top:1rem}
.site-row{margin:0}
.site-btn{display:flex;align-items:center;gap:.8rem;width:100%;text-align:start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:.9rem 1rem}
.site-name{font-weight:600}
.site-domain{color:var(--muted);font-size:.9rem}
.badge{margin-inline-start:auto;font-size:.72rem;padding:.15rem .5rem;border-radius:6px;border:1px solid var(--line)}
.badge.active{color:var(--ok)} .badge.paused{color:var(--bad)}

/* editor */
.app,.app body{height:100%}
.editor{display:flex;height:100vh;height:100dvh}
.chat{width:380px;min-width:320px;display:flex;flex-direction:column;background:var(--panel);border-inline-end:1px solid var(--line)}
.chat-head{display:flex;align-items:center;gap:.6rem;padding:.8rem 1rem;border-bottom:1px solid var(--line)}
.chat-head .site-name{font-weight:600}
.chat-head .quota{margin-inline-start:auto;font-size:.75rem;color:var(--muted)}
.chat-head .signout{margin-inline-start:.4rem}
.messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.6rem}
.msg{max-width:85%;padding:.6rem .8rem;border-radius:12px;line-height:1.5;font-size:.95rem;white-space:pre-wrap;word-wrap:break-word}
.msg.bot{background:#f0efec;align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:var(--accent);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg.err{background:#fdecea;color:var(--bad)}
.msg.working{opacity:.6}
.composer{border-top:1px solid var(--line);padding:.7rem}
.composer-actions{display:flex;gap:.5rem;margin-bottom:.55rem}
.undo,.history-btn{flex:1;background:#fff;border:1px solid var(--line);border-radius:10px;padding:.55rem;font-weight:600;color:var(--ink)}
.undo:disabled,.history-btn:disabled{opacity:.4;cursor:default}
.history-panel{border:1px solid var(--line);border-radius:10px;margin-bottom:.55rem;max-height:220px;overflow-y:auto;background:#fff}
.ver{display:flex;align-items:center;justify-content:space-between;gap:.6rem;padding:.5rem .7rem;border-bottom:1px solid var(--line);font-size:.9rem}
.ver:last-child{border-bottom:0}
.ver button{border:1px solid var(--line);background:transparent;border-radius:8px;padding:.3rem .6rem;color:var(--ink);font-weight:600}
.history-panel .muted{padding:.7rem}
.input-row{display:flex;gap:.5rem;align-items:flex-end}
.input-row textarea{resize:none;max-height:140px}
.plus{width:42px;height:42px;flex:none;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:1.3rem;line-height:1}
.plus:disabled{opacity:.4;cursor:default}
.send{flex:none;padding:.7rem 1.1rem}
.send:disabled{opacity:.5;cursor:default}

.preview{flex:1;display:flex;flex-direction:column;background:#ddd}
.preview-bar{display:flex;align-items:center;gap:.5rem;padding:.5rem .9rem;background:var(--panel);border-bottom:1px solid var(--line);font-size:.85rem;color:var(--muted)}
.preview-bar .dot{width:9px;height:9px;border-radius:50%;background:var(--ok)}
.tab-toggle{display:none;margin-inline-start:auto}
.preview iframe{flex:1;width:100%;border:0;background:#fff}

/* mobile: stack + toggle (section 11) */
@media (max-width:760px){
  .editor{flex-direction:column}
  .chat{width:auto;flex:1;border-inline-end:0}
  .preview{display:none}
  .tab-toggle{display:inline-block}
  body.show-preview .chat{display:none}
  body.show-preview .preview{display:flex;flex:1}
}

@media (prefers-color-scheme:dark){
  :root{--ink:#ececee;--muted:#9a9aa1;--line:#2a2a2e;--bg:#141416;--panel:#1c1c1f;--accent:#fff;--accent-ink:#111}
  .msg.bot{background:#26262a}
  .plus,.undo,.ghost,input,textarea{background:#232327}
}