:root{--page:#eef2f7;--card:#fff;--head:#f8fafc;--ink:#1e293b;--muted:#64748b;--line:#dbe3ec;--accent:#2563eb;--soft:#eff6ff;--danger:#b91c1c;--green:#15803d}*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--page)}button,input{font:inherit}.shell{height:100dvh;max-width:1100px;margin:auto;background:var(--card);display:flex;flex-direction:column;overflow:hidden}.topbar{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--head);border-bottom:1px solid var(--line);flex-wrap:wrap}.brand{font-weight:800;margin-right:auto}.top-actions{display:flex;gap:6px;flex-wrap:wrap}.btn{border:1px solid var(--line);background:white;color:var(--ink);border-radius:8px;padding:7px 10px;cursor:pointer;text-decoration:none}.btn:hover{background:#f1f5f9}.btn.primary{background:var(--accent);color:white;border-color:var(--accent)}.btn.home{background:var(--green);color:white;border-color:var(--green)}.btn.danger{color:var(--danger)}.tabs{display:flex;gap:5px;padding:7px 10px;border-bottom:1px solid var(--line);overflow-x:auto;background:white;min-height:46px}.tab{white-space:nowrap;border:1px solid var(--line);background:#f8fafc;border-radius:8px;padding:7px 10px;cursor:pointer}.tab.active{background:var(--soft);border-color:#93c5fd;font-weight:700}.badge{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border-radius:10px;background:#dc2626;color:white;font-size:12px;margin-left:4px}.main{display:flex;flex:1;min-height:0;position:relative}.messages{flex:1;overflow:auto;padding:12px 14px;background:#fff}.line{display:flex;gap:7px;align-items:baseline;padding:5px 2px;line-height:1.38;word-break:break-word}.line.system{justify-content:center;color:var(--muted);font-style:italic;font-size:.9rem}.author{font-weight:800;white-space:nowrap;cursor:pointer}.role-admin:after{content:" 🛡️"}.role-mod:after{content:" ◇"}.bot{font-weight:800;color:#0f766e}.text.bold{font-weight:800}.text.italic{font-style:italic}.text.bolditalic{font-weight:800;font-style:italic}.time{margin-left:auto;color:#94a3b8;font-size:.72rem;white-space:nowrap}.users{width:235px;border-left:1px solid var(--line);padding:10px;background:var(--head);overflow:auto}.users h3{font-size:.82rem;color:var(--muted);margin:0 0 8px}.user{padding:8px;border-radius:7px;cursor:pointer;display:flex;justify-content:space-between}.user:hover{background:#e9eef5}.composer{display:flex;gap:7px;padding:9px 10px;border-top:1px solid var(--line);background:var(--head)}.composer input{flex:1;min-width:0;padding:10px 11px;border:1px solid #cbd5e1;border-radius:8px}.popover,.modal{display:none}.popover.open{display:block;position:absolute;right:10px;top:56px;z-index:20;background:white;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px #0002;padding:12px;width:min(360px,calc(100% - 20px))}.setting-title{font-size:.8rem;color:var(--muted);margin:7px 0}.palette{display:flex;gap:9px;flex-wrap:wrap}.dot{width:25px;height:25px;border-radius:50%;border:2px solid transparent;cursor:pointer}.dot.sel{outline:2px solid #94a3b8;outline-offset:2px}.styles{display:flex;gap:6px;flex-wrap:wrap}.stylebtn.sel{background:var(--soft);border-color:#60a5fa}.modal{position:fixed;inset:0;background:#0f172a80;z-index:50;align-items:center;justify-content:center;padding:16px}.modal.open{display:flex}.box{background:white;border-radius:14px;padding:18px;width:min(430px,100%);box-shadow:0 18px 50px #0004}.box h2,.box h3{margin:0 0 12px}.box input{width:100%;padding:11px;margin:5px 0;border:1px solid #cbd5e1;border-radius:8px}.notice{font-size:.82rem;color:var(--muted);line-height:1.4;margin:10px 0}.login-actions{display:flex;gap:8px;flex-wrap:wrap}.tech-menu{margin:8px 0 8px 26px;padding:10px;border:1px solid #bae6fd;background:#f0f9ff;border-radius:10px}.tech-buttons{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.tech{border:1px solid #7dd3fc;background:white;border-radius:16px;padding:5px 9px;cursor:pointer}.tech-card{margin:8px 0 8px 26px;padding:10px 12px;border-left:4px solid #0ea5e9;background:#f0f9ff;border-radius:7px}.tech-card strong{display:block;margin-bottom:4px}.empty{color:#94a3b8;text-align:center;padding:35px 10px}.admin-list{max-height:50vh;overflow:auto}.admin-row{border-bottom:1px solid var(--line);padding:9px 0}.admin-row .actions{display:flex;gap:5px;flex-wrap:wrap;margin-top:5px}@media(min-width:768px){.shell{height:94dvh;margin-top:3dvh;border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 35px #0f172a12}}@media(max-width:720px){.users{position:absolute;right:-260px;top:0;bottom:0;z-index:15;box-shadow:-10px 0 25px #0002;transition:right .2s}.users.open{right:0}.brand{width:100%}.top-actions{width:100%}.top-actions .btn{flex:1;text-align:center;padding:7px 6px}.line{font-size:.94rem}.time{font-size:.65rem}.messages{padding:9px}.composer{padding-bottom:max(9px,env(safe-area-inset-bottom))}}

.help-hint{padding:6px 12px;border-bottom:1px solid var(--line);background:#f8fafc;color:var(--muted);font-size:.78rem}.bot-close{float:right;border:0;background:transparent;color:#64748b;font-size:1.05rem;cursor:pointer;padding:0 2px 2px 8px}.bot-close:hover{color:#0f172a}.tech-menu:after,.tech-card:after{content:"";display:block;clear:both}#adminSearch{width:100%;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;margin-bottom:5px}.appearance-preview{margin-top:10px;padding:8px 10px;border:1px dashed #cbd5e1;border-radius:8px;background:#f8fafc}.appearance-preview span{font-weight:700;margin-right:6px}@media(max-width:720px){.help-hint{font-size:.74rem;padding:5px 10px}}

.private-tab{display:flex;align-items:center;gap:5px}.tab-close{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;font-size:16px;line-height:1;color:#64748b}.tab-close:hover{background:#e2e8f0;color:#b91c1c}.admin-box{width:min(560px,100%)}.room-create{display:flex;gap:7px;align-items:center}.room-create input{flex:1}.room-create .btn{white-space:nowrap}.room-admin-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:6px 0;border-bottom:1px solid var(--line)}.sep{border:0;border-top:1px solid var(--line);margin:14px 0}

/* v1.7 - Administración responsive con dos zonas de scroll */
.admin-box{
  width:min(620px,100%);
  max-height:min(88dvh,760px);
  padding:0;
  display:flex;
  flex-direction:column;
  overflow:hidden;
}
.admin-scroll-shell{
  flex:1;
  min-height:0;
  display:flex;
  flex-direction:column;
  overflow:hidden;
  padding:18px 18px 0;
}
.admin-rooms-section{
  flex:0 0 auto;
  max-height:220px;
  overflow:hidden;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
  margin-bottom:14px;
}
.room-admin-list{
  max-height:105px;
  overflow:auto;
  padding-right:4px;
}
.admin-users-section{
  flex:1;
  min-height:0;
  display:flex;
  flex-direction:column;
}
.admin-users-section h3{
  flex:0 0 auto;
}
.admin-users-section #adminSearch,
.admin-users-section #adminCount{
  flex:0 0 auto;
}
.admin-list{
  flex:1;
  min-height:0;
  max-height:none;
  overflow:auto;
  padding-right:4px;
}
.admin-footer{
  flex:0 0 auto;
  padding:10px 18px 14px;
  border-top:1px solid var(--line);
  background:white;
}
.admin-footer .btn{
  width:100%;
}
@media(max-width:720px){
  .modal{padding:8px}
  .admin-box{
    width:100%;
    max-height:92dvh;
    border-radius:12px;
  }
  .admin-scroll-shell{
    padding:14px 14px 0;
  }
  .admin-rooms-section{
    max-height:190px;
  }
  .room-admin-list{
    max-height:78px;
  }
  .room-create{
    align-items:stretch;
  }
  .room-create input{
    min-width:0;
  }
  .admin-footer{
    padding:9px 14px 12px;
  }
}
@media(max-width:430px){
  .room-create{
    display:grid;
    grid-template-columns:1fr;
  }
  .room-create .btn{
    width:100%;
  }
}

/* v1.8 - ZonaBot diagrams + appearance/read refinements */
.tech-card-actions{margin-top:9px}.tech-diagram{margin-top:10px;padding:10px;border:1px solid #bae6fd;border-radius:9px;background:white;overflow-x:auto}.diagram-title{font-weight:800;font-size:.86rem;margin-bottom:8px;color:#0f172a}.diagram-legend{font-size:.78rem;line-height:1.35;color:#475569;margin-top:8px}.mini-grid{display:grid;width:min(280px,92%);aspect-ratio:1;margin:auto;border:2px solid #475569;background:#475569;gap:1px}.grid6{grid-template-columns:repeat(6,1fr)}.grid5{grid-template-columns:repeat(5,1fr)}.grid3{grid-template-columns:repeat(3,1fr);width:min(180px,82%)}.dcell{background:#fff;display:grid;place-items:center;min-width:28px;min-height:28px;font-size:.78rem}.dcell.strong{background:#dbeafe;font-weight:800}.dcell.elim{background:#fee2e2}.cand{font-size:.9rem;font-weight:800}.cand.strike{text-decoration:line-through;text-decoration-thickness:2px;color:#b91c1c}.candidate-row{display:grid;grid-template-columns:repeat(4,minmax(52px,1fr));gap:3px;max-width:360px;margin:auto}.candidate-row .dcell{border:1px solid #cbd5e1;padding:8px 4px}.node-diagram{display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap;padding:7px}.logic-node{min-width:70px;text-align:center;padding:8px;border-radius:9px;border:2px solid #94a3b8;font-weight:800}.logic-node.pivot{background:#fef3c7;border-color:#d97706}.logic-node.pincer{background:#dbeafe;border-color:#2563eb}.logic-line{width:24px;border-top:2px solid #64748b}.logic-elim,.color-elim{padding:5px 8px;border-radius:8px;background:#fee2e2;color:#b91c1c;font-weight:800}.color-chain{display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap;padding:8px}.color-node{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:50%;font-weight:800;border:2px solid #64748b}.color-node.a{background:#dbeafe}.color-node.b{background:#fef3c7}@media(max-width:480px){.tech-diagram{padding:8px}.candidate-row{grid-template-columns:repeat(2,1fr)}.logic-line{width:12px}.dcell{min-width:24px;min-height:24px}.diagram-legend{font-size:.75rem}}

/* v1.9 · entrada y reserva aprobadas, sin alterar la maquetación del chat */
.login-box,.reserve-box{max-width:460px}.login-welcome{margin-bottom:12px}.login-actions-stacked{display:grid;grid-template-columns:1fr;margin-top:12px}.login-actions-stacked .btn{text-align:center;width:100%}
.reserved-login{margin-top:12px;padding:12px;border:1px solid #fed7aa;background:#fff7ed;border-radius:10px}.reserved-login h3{margin:0 0 5px;font-size:1rem}
.key-shell{position:relative;display:inline-block;max-width:100%;cursor:text;margin-top:5px}.key-input{position:absolute;inset:0;width:100%;height:100%;opacity:.01;border:0!important;outline:0!important;box-shadow:none!important;text-transform:uppercase}.key-boxes{display:flex;gap:3px;pointer-events:none}.key-box{width:36px;height:44px;border:1px solid #cbd5e1;border-radius:6px;background:#fff;display:grid;place-items:center;font-weight:800;font-size:1.12rem}.key-box.filled{background:#fff7ed;border-color:#f59e0b}.key-box.ready{box-shadow:0 0 0 2px #ffedd5;border-color:#fdba74}.reserve-name-btn{white-space:nowrap}
@media(max-width:700px){.key-box{width:32px;height:42px}.reserve-name-btn{order:3}}@media(max-width:380px){.key-box{width:29px;height:40px}.key-boxes{gap:2px}}

.identity-status{font-size:.86rem;font-weight:700;white-space:nowrap;color:#475569;margin-left:4px}.role-admin:after,.role-mod:after{content:""!important}
@media(max-width:720px){.identity-status{flex:0 0 auto}}