:root{
  --bg:#f7f7f5; --panel:#fff; --ink:#1f1d1a; --muted:#73706a; --line:#e6e3dd;
  --accent:#c96442; --accent-ink:#fff; --user:#f0ede6; --code:#2b2925; --code-ink:#f3f0ea;
  --ok:#2f7d4f; --off:#b03636; --warn-bg:#fdf3e7; --warn-ink:#8a5a1a;
  --radius:12px; --maxw:820px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);font-size:15px;line-height:1.55}
a{color:var(--accent)}
.muted{color:var(--muted)}
.small{font-size:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);
  background:var(--panel);color:var(--ink);padding:8px 14px;border-radius:10px;cursor:pointer;font-size:14px;text-decoration:none}
.btn:hover{background:#f0eee9}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.05)}
.btn.block{width:100%}
.link{background:none;border:none;color:var(--accent);cursor:pointer;text-decoration:none;font-size:13px;padding:0}
.link.danger{color:var(--off)}
.tag{background:var(--accent);color:#fff;border-radius:6px;padding:1px 7px;font-size:11px}
.ok{color:var(--ok)} .off{color:var(--off)}

/* ---------- Auth ---------- */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:32px;width:100%;max-width:400px;box-shadow:0 6px 30px rgba(0,0,0,.06)}
.auth-card h1{margin:0 0 8px}
form label{display:block;margin:14px 0;font-size:13px;color:var(--muted)}
form input,form select,form textarea{width:100%;margin-top:5px;padding:10px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink)}
form textarea{resize:vertical}
.check{display:flex;align-items:center;gap:8px}
.check input{width:auto;margin:0}
.alert{padding:10px 14px;border-radius:9px;margin:12px 0;font-size:14px}
.alert.error{background:#fbeaea;color:var(--off)}
.alert.warn{background:var(--warn-bg);color:var(--warn-ink)}
.alert.ok-alert{background:#e9f5ec;color:var(--ok)}
.alert.banner{margin:0;border-radius:0}

/* ---------- App layout ---------- */
.app-body{height:100vh;height:100dvh;overflow:hidden}
#app{display:flex;height:100vh;height:100dvh}
.sidebar{width:270px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column}
.sidebar-head{padding:14px}
.conv-list{flex:1;overflow-y:auto;padding:0 8px}
.conv-item{display:flex;align-items:center;gap:6px;padding:9px 10px;border-radius:9px;cursor:pointer;font-size:14px;color:var(--ink)}
.conv-item:hover{background:#f0eee9}
.conv-item.active{background:#ece8e0;font-weight:600}
.conv-item .title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv-item .x{opacity:0;color:var(--muted);font-size:16px;line-height:1}
.conv-item:hover .x{opacity:1}
.sidebar-foot{border-top:1px solid var(--line);padding:12px 14px}
.budget-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.budget-value{font-size:15px;font-weight:600;margin:2px 0 6px}
.budget-bar{height:6px;background:#eee;border-radius:4px;overflow:hidden}
.budget-fill{height:100%;background:var(--accent)}
.user-box{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:13px}
.user-box .who{font-weight:600}
.user-box .spacer{flex:1}

.chat{flex:1;display:flex;flex-direction:column;min-width:0}
.chat-head{display:flex;align-items:center;gap:12px;padding:10px 18px;border-bottom:1px solid var(--line);background:var(--panel)}
.menu-btn{display:none;background:none;border:none;font-size:22px;line-height:1;color:var(--ink);cursor:pointer;padding:4px 6px;margin:-4px 0}
.backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:40}
.model-sel{padding:7px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:13px}
.conv-title{color:var(--muted);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.messages{flex:1;overflow-y:auto;padding:24px 16px}
.empty-state{max-width:var(--maxw);margin:12vh auto;text-align:center}
.empty-state h2{font-weight:600}
.msg{max-width:var(--maxw);margin:0 auto 22px;display:flex;gap:12px}
.msg .avatar{width:30px;height:30px;border-radius:7px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff}
.msg.user .avatar{background:#6b6864}
.msg.assistant .avatar{background:var(--accent)}
.msg .bubble{flex:1;min-width:0}
.msg.user .bubble{background:var(--user);padding:10px 14px;border-radius:12px}
.bubble p{margin:0 0 10px}
.bubble p:last-child{margin-bottom:0}
.bubble pre{background:var(--code);color:var(--code-ink);padding:0;border-radius:10px;overflow:hidden;margin:12px 0}
.bubble pre .code-head{display:flex;align-items:center;justify-content:space-between;background:#00000022;padding:6px 12px;font-size:12px;color:#cfcabf}
.bubble pre code{display:block;padding:14px;overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.5;white-space:pre}
.bubble code.inline{background:#e7e3db;border-radius:5px;padding:1px 5px;font-family:ui-monospace,monospace;font-size:13px}
.bubble ul,.bubble ol{margin:8px 0;padding-left:22px}
.bubble h1,.bubble h2,.bubble h3{margin:14px 0 8px;line-height:1.3}
.bubble table{border-collapse:collapse;margin:10px 0;font-size:13px}
.bubble th,.bubble td{border:1px solid var(--line);padding:6px 10px}
.dl-btn{background:#ffffff22;border:1px solid #ffffff33;color:#fff;border-radius:6px;padding:2px 9px;font-size:12px;cursor:pointer}
.dl-btn:hover{background:#ffffff33}
.msg-atts{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.att-chip{background:#fff;border:1px solid var(--line);border-radius:8px;padding:4px 9px;font-size:12px}
.typing{display:inline-block;width:8px;height:16px;background:var(--accent);animation:blink 1s steps(2) infinite;vertical-align:text-bottom}
@keyframes blink{0%,50%{opacity:1}50%,100%{opacity:0}}
.msg-cost{font-size:11px;color:var(--muted);margin-top:6px}
.status-line{color:var(--muted);font-size:13px;margin:6px 0;font-style:italic}
.gfiles{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.gen-file{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:10px;padding:8px 12px;text-decoration:none;color:var(--ink);font-size:13px}
.gen-file:hover{background:#f0eee9;border-color:var(--accent)}
.gen-file .gf-ico{color:var(--accent);font-weight:700}
.gen-file .gf-name{font-weight:600}

.composer{border-top:1px solid var(--line);background:var(--panel);padding:12px 16px}
.composer-row{max-width:var(--maxw);margin:0 auto;display:flex;align-items:flex-end;gap:8px;border:1px solid var(--line);border-radius:14px;padding:6px 8px;background:#fff}
.composer-row textarea{flex:1;border:none;outline:none;resize:none;max-height:200px;font-family:inherit;font-size:15px;padding:8px;background:transparent;color:var(--ink)}
.composer-row textarea:focus{outline:none}
.attach-btn{cursor:pointer;font-size:20px;padding:6px;user-select:none}
.composer .btn.primary{border-radius:10px;padding:8px 14px;font-size:16px}
.composer-foot{max-width:var(--maxw);margin:6px auto 0;text-align:center;font-size:11px}
.attach-list{max-width:var(--maxw);margin:0 auto 6px;display:flex;flex-wrap:wrap;gap:6px}
.attach-list .att-chip{display:flex;align-items:center;gap:6px}
.attach-list .att-chip .rm{cursor:pointer;color:var(--off)}

/* ---------- Admin ---------- */
.admin-body{background:var(--bg)}
.admin-top{display:flex;align-items:center;gap:18px;background:var(--panel);border-bottom:1px solid var(--line);padding:10px 22px}
.admin-brand{font-size:15px;letter-spacing:.01em;white-space:nowrap}
.admin-nav{display:flex;gap:4px;align-items:center}
.admin-actions{display:flex;gap:12px;align-items:center;margin-left:auto}
.admin-link{color:var(--muted);text-decoration:none;font-size:14px;font-weight:500;padding:7px 12px;border-radius:9px;transition:background .12s,color .12s}
.admin-link:hover{background:#f0eee9;color:var(--ink)}
.admin-link.active{background:var(--accent);color:var(--accent-ink)}
.admin-actions .btn{padding:6px 12px;font-size:13px}
.admin-main{max-width:1100px;margin:24px auto;padding:0 20px}
.cards{display:flex;gap:14px;flex-wrap:wrap;margin:16px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px;min-width:160px}
.card-label{font-size:12px;color:var(--muted)}
.card-value{font-size:24px;font-weight:700;margin-top:4px}
.table{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:14px 0}
.table th,.table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.table th{background:#faf9f6;font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
.table td.num,.table th.num{text-align:right}
.table.compact th,.table.compact td{padding:7px 10px}
.mini-bar{height:5px;background:#eee;border-radius:3px;margin-top:4px;overflow:hidden}
.mini-bar div{height:100%;background:var(--accent)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
/* Usuarios: formulario estrecho + tabla a todo el ancho restante */
.users-layout{display:grid;grid-template-columns:minmax(320px,380px) 1fr;gap:20px;align-items:start}
@media(max-width:900px){.users-layout{grid-template-columns:1fr}}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;margin:16px 0}
.panel h2{margin-top:0;font-size:16px}
.row-actions{display:flex;gap:12px;align-items:center}
@media(max-width:780px){.grid-2{grid-template-columns:1fr}}

/* ---------- Mobile chat ---------- */
@media(max-width:720px){
  .menu-btn{display:inline-flex;align-items:center;justify-content:center}
  /* Sidebar como drawer deslizable */
  .sidebar{position:fixed;top:0;left:0;bottom:0;z-index:50;width:min(82vw,300px);
    transform:translateX(-100%);transition:transform .25s ease;box-shadow:2px 0 20px rgba(0,0,0,.12)}
  #app.nav-open .sidebar{transform:translateX(0)}
  #app.nav-open .backdrop{display:block}
  /* El "×" de borrar siempre visible en táctil */
  .conv-item .x{opacity:.55}
  .conv-item{padding:11px 10px}
  /* Espaciados más compactos */
  .chat-head{padding:9px 12px;gap:8px}
  .conv-title{font-size:13px}
  .messages{padding:16px 12px}
  .msg{gap:9px;margin-bottom:18px}
  .msg .avatar{width:26px;height:26px;font-size:11px}
  .empty-state{margin:8vh auto}
  .composer{padding:10px 12px env(safe-area-inset-bottom,10px)}
  .composer-row textarea{font-size:16px} /* evita el zoom de iOS al enfocar */
  .bubble pre code{font-size:12px}
  .bubble table{display:block;overflow-x:auto;max-width:100%}
}
@media(max-width:380px){
  .composer .btn.primary{padding:8px 11px}
  .chat-head{gap:6px}
}

/* ---------- Mobile admin ---------- */
@media(max-width:720px){
  .admin-top{flex-wrap:wrap;gap:10px;padding:10px 14px}
  .admin-nav{order:3;width:100%;gap:6px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:8px}
  .admin-nav .admin-link{flex:1 1 auto;text-align:center}
  .admin-actions{margin-left:auto}
  .admin-main{margin:16px auto;padding:0 12px}
  .cards{gap:10px}
  .card{flex:1 1 130px;min-width:0;padding:14px}
  .card-value{font-size:20px}
  .panel{padding:16px}
  /* Tablas -> tarjetas apiladas (legibles en pantalla estrecha) */
  .table{display:block;border:none;background:none;overflow:visible;margin:14px 0}
  .table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)} /* oculta cabecera (accesible) */
  .table tbody,.table tr,.table td{display:block;width:auto}
  .table tr{border:1px solid var(--line);border-radius:12px;background:var(--panel);
    padding:4px 14px;margin:0 0 12px}
  .table td{border:none;padding:7px 0;display:flex;justify-content:space-between;
    align-items:baseline;gap:16px;text-align:right;font-size:13px;word-break:break-word}
  .table td::before{content:attr(data-label);font-weight:600;color:var(--muted);
    text-align:left;flex:0 0 42%;text-transform:none;letter-spacing:0}
  .table td:empty{display:none}
  .table td.num,.table th.num{text-align:right}
  /* Primera columna como título de la tarjeta */
  .table td:first-child{display:block;text-align:left;font-size:15px;font-weight:600;
    padding:8px 0 9px;margin-bottom:4px;border-bottom:1px solid var(--line)}
  .table td:first-child::before{display:none}
  .table td:first-child .small,.table td:first-child .muted{font-weight:400}
  /* Celda de acciones a lo ancho */
  .table td.acciones{display:block;margin-top:4px;padding-top:11px;border-top:1px solid var(--line)}
  .table td.acciones::before{display:none}
  .table td.acciones .row-actions{justify-content:flex-start;flex-wrap:wrap;gap:16px}
  .mini-bar{width:120px}
}