/* ============================================================
   QueryLab · Terminal de Bases de Datos
   Paleta fósforo + cian + magenta sobre negro-azulado
   Autor: Dr. César Ortiz Méndez · https://cv-cesarortiz.vercel.app
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --bg:        #070b11;
  --bg-elev:   #0c121c;
  --bg-panel:  #0f1825;
  --line:      #16202e;
  --grid:      rgba(0,255,156,.045);

  --phosphor:  #00ff9c;   /* primario  */
  --cyan:      #2bd9ff;   /* datos/links */
  --magenta:   #ff2e97;   /* acento/alertas */
  --amber:     #ffb627;   /* warnings */
  --violet:    #a87bff;

  --text:      #cdd9e6;
  --muted:     #5d7186;
  --dim:       #3a4a5c;

  --mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', ui-monospace, monospace;
  --sans: 'Inter', system-ui, sans-serif;

  --glow: 0 0 12px;
  --radius: 4px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--mono); font-size:14px; line-height:1.6;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  min-height:100vh;
}
/* scanlines sutiles */
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:1;
  background:repeating-linear-gradient(0deg, rgba(0,0,0,.18) 0 1px, transparent 1px 3px);
  opacity:.35; mix-blend-mode:multiply;
}
a{ color:var(--cyan); text-decoration:none; }
a:hover{ color:var(--phosphor); }
::selection{ background:var(--phosphor); color:#000; }

/* ---------- Barra de estado superior ---------- */
.statusbar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; gap:18px;
  height:40px; padding:0 16px;
  background:linear-gradient(180deg,#0c1420,#080d15);
  border-bottom:1px solid var(--line);
  font-size:12px; letter-spacing:.04em;
}
.statusbar .brand{ color:var(--phosphor); font-weight:800; text-shadow:var(--glow) rgba(0,255,156,.5); }
.statusbar .brand b{ color:var(--magenta); }
.statusbar .sep{ color:var(--dim); }
.statusbar .engine{ margin-left:auto; display:flex; align-items:center; gap:8px; color:var(--muted); }
.dot{ width:8px; height:8px; border-radius:50%; background:var(--amber); box-shadow:var(--glow) var(--amber); animation:pulse 1.4s infinite; }
.dot.ready{ background:var(--phosphor); box-shadow:var(--glow) var(--phosphor); animation:none; }
.dot.err{ background:var(--magenta); box-shadow:var(--glow) var(--magenta); animation:none; }
@keyframes pulse{ 0%,100%{opacity:1} 50%{opacity:.35} }

/* ---------- Layout ---------- */
.shell{ display:grid; grid-template-columns:268px 1fr; min-height:calc(100vh - 40px); position:relative; z-index:2; }
.sidebar{
  border-right:1px solid var(--line); background:linear-gradient(180deg,#0a111b,#070b11);
  padding:16px 10px; position:sticky; top:40px; height:calc(100vh - 40px); overflow-y:auto;
}
.sidebar .tree-title{ color:var(--muted); font-size:11px; letter-spacing:.18em; text-transform:uppercase; margin:6px 8px 12px; }
.tree a{
  display:flex; align-items:baseline; gap:8px; padding:7px 9px; border-radius:var(--radius);
  color:var(--text); font-size:12.5px; border-left:2px solid transparent;
}
.tree a .num{ color:var(--dim); font-weight:700; }
.tree a:hover{ background:#101a28; border-left-color:var(--cyan); color:var(--cyan); }
.tree a.on{ background:#0d2018; border-left-color:var(--phosphor); color:var(--phosphor); }
.tree a.on .num{ color:var(--phosphor); }
.tree .grp{ margin:18px 0 6px; }
.tree .ext a:hover{ border-left-color:var(--magenta); color:var(--magenta); }

.main{ padding:30px 38px 80px; max-width:1180px; }
.main.wide{ max-width:1320px; }

/* ---------- Tipografía de contenido ---------- */
.eyebrow{ color:var(--magenta); font-size:11px; letter-spacing:.22em; text-transform:uppercase; margin-bottom:10px; }
h1.page{ font-size:34px; font-weight:800; margin:0 0 4px; letter-spacing:-.5px; color:#eaf2fa;
  text-shadow:0 0 24px rgba(0,255,156,.12); }
h1.page .hl{ color:var(--phosphor); }
.subtitle{ color:var(--muted); font-size:15px; margin-bottom:8px; }
.apunte-tag{ display:inline-block; margin-top:10px; padding:4px 10px; border:1px solid var(--line);
  border-radius:99px; color:var(--cyan); font-size:11.5px; background:#0a131e; }

.prose{ font-family:var(--sans); font-size:15.5px; color:#bac8d6; line-height:1.72; }
.prose b{ color:#e6eef7; }
.prose code{ font-family:var(--mono); background:#0c1622; color:var(--phosphor); padding:1px 6px;
  border-radius:3px; font-size:.86em; border:1px solid #14202e; }
.prose ul,.prose ol{ padding-left:22px; } .prose li{ margin:5px 0; }

.section-h{ display:flex; align-items:center; gap:12px; margin:42px 0 16px; }
.section-h .bar{ width:3px; height:22px; background:var(--phosphor); box-shadow:var(--glow) var(--phosphor); }
.section-h h2{ font-size:18px; margin:0; color:#e3ecf5; font-weight:700; letter-spacing:.02em; }

/* ---------- Tarjetas de concepto ---------- */
.concepts{ display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:12px; }
.concept{ background:var(--bg-panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:13px 15px; border-top:2px solid var(--cyan); }
.concept .t{ color:var(--phosphor); font-weight:700; font-size:13px; margin-bottom:4px; }
.concept .d{ color:var(--muted); font-size:12.5px; font-family:var(--sans); }

/* ---------- Bloques de ejemplo (editor R) ---------- */
.example{ margin:20px 0; border:1px solid var(--line); border-radius:6px; overflow:hidden; background:var(--bg-elev); }
.example .head{ display:flex; align-items:center; gap:10px; padding:10px 14px; background:#0b1421; border-bottom:1px solid var(--line); }
.example .head .n{ color:var(--magenta); font-weight:800; font-size:12px; }
.example .head .ttl{ color:#dce6f0; font-weight:600; font-size:13.5px; }
.example .explain{ padding:10px 14px; color:var(--muted); font-size:13px; font-family:var(--sans); border-bottom:1px dashed var(--line); }
.example .explain code{ color:var(--cyan); background:#0c1622; padding:0 5px; border-radius:3px; font-family:var(--mono); }

/* ---------- Componente consola R ---------- */
.rconsole{ border:1px solid var(--line); border-radius:6px; background:var(--bg-elev); overflow:hidden; }
.rconsole .bar{ display:flex; align-items:center; gap:8px; padding:8px 12px; background:#0a1320; border-bottom:1px solid var(--line); }
.rconsole .bar .lamps{ display:flex; gap:6px; }
.rconsole .bar .lamps i{ width:10px; height:10px; border-radius:50%; display:block; }
.rconsole .bar .lamps i:nth-child(1){ background:#ff5f56; } .rconsole .bar .lamps i:nth-child(2){ background:#ffbd2e; } .rconsole .bar .lamps i:nth-child(3){ background:#27c93f; }
.rconsole .bar .fname{ color:var(--muted); font-size:12px; margin-left:6px; }
.rconsole .bar .actions{ margin-left:auto; display:flex; gap:8px; }
.btn{ font-family:var(--mono); font-size:12px; font-weight:600; cursor:pointer; border-radius:4px;
  padding:6px 13px; border:1px solid var(--line); background:#0c1724; color:var(--text); transition:.15s; }
.btn:hover{ border-color:var(--cyan); color:var(--cyan); }
.btn.run{ background:#0d2018; border-color:#15402c; color:var(--phosphor); }
.btn.run:hover{ box-shadow:var(--glow) rgba(0,255,156,.35); background:#0f2a1d; }
.btn.warn:hover{ border-color:var(--magenta); color:var(--magenta); }
.btn[disabled]{ opacity:.4; cursor:not-allowed; }

.rgrid{ display:grid; grid-template-columns:1fr; }
.rgrid.split{ grid-template-columns:1fr 1fr; }
.editor{ position:relative; }
.editor textarea{ width:100%; min-height:150px; resize:vertical; border:none; outline:none;
  background:#070d15; color:#d7e6d8; font-family:var(--mono); font-size:13.5px; line-height:1.55;
  padding:14px 14px 14px 14px; tab-size:2; }
.editor textarea::placeholder{ color:var(--dim); }
.output-wrap{ border-top:1px solid var(--line); }
.rgrid.split .output-wrap{ border-top:none; border-left:1px solid var(--line); }
.out-head{ padding:6px 12px; color:var(--muted); font-size:11px; letter-spacing:.12em; text-transform:uppercase; background:#0a1320; border-bottom:1px solid var(--line); }
.output{ margin:0; padding:12px 14px; white-space:pre-wrap; word-break:break-word;
  font-family:var(--mono); font-size:13px; color:#bfe9cf; min-height:60px; max-height:420px; overflow:auto; }
.output .err{ color:var(--magenta); }
.output .prompt{ color:var(--phosphor); }
.plotbox{ padding:12px; text-align:center; background:#fbfdff; border-top:1px solid var(--line); }
.rgrid.split .plotbox{ border-top:none; border-left:1px solid var(--line); }
.plotbox canvas{ max-width:100%; height:auto; border-radius:4px; }
.plotbox .empty{ color:#9fb0bf; font-family:var(--sans); font-size:13px; padding:40px 0; }

/* ---------- Hero portada ---------- */
.hero{ padding:46px 0 30px; border-bottom:1px solid var(--line); margin-bottom:30px; }
.hero h1{ font-size:52px; font-weight:800; margin:0 0 6px; letter-spacing:-1.5px; line-height:1.04; color:#eef5fb; }
.hero h1 .g{ color:var(--phosphor); text-shadow:0 0 30px rgba(0,255,156,.35); }
.hero .lead{ font-family:var(--sans); color:var(--muted); font-size:17px; max-width:680px; }
.hero .byline{ font-family:var(--sans); font-size:14px; color:var(--muted); margin-top:18px;
  padding-top:14px; border-top:1px dashed var(--line); }
.hero .byline a{ color:var(--cyan); } .hero .byline a:hover{ color:var(--phosphor); }
.hero .byline b{ color:var(--phosphor); }
.boot{ margin-top:22px; background:#070d15; border:1px solid var(--line); border-radius:6px; padding:14px 16px;
  font-size:13px; color:var(--phosphor); min-height:118px; }
.boot .l{ display:block; } .boot .c{ color:var(--cyan); } .boot .m{ color:var(--muted); }
.cursor{ display:inline-block; width:8px; height:15px; background:var(--phosphor); vertical-align:middle; animation:blink 1s steps(1) infinite; }
@keyframes blink{ 50%{ opacity:0 } }

.cards{ display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; margin-top:8px; }
.card{ display:block; background:var(--bg-panel); border:1px solid var(--line); border-radius:6px; padding:16px;
  border-left:2px solid var(--line); transition:.15s; }
.card:hover{ border-left-color:var(--phosphor); transform:translateY(-2px); background:#101a28; }
.card .k{ color:var(--dim); font-size:12px; font-weight:700; }
.card .ttl{ color:#e3ecf5; font-weight:700; font-size:15px; margin:6px 0 4px; }
.card:hover .ttl{ color:var(--phosphor); }
.card .sub{ color:var(--muted); font-size:12.5px; font-family:var(--sans); }
.card.ext{ border-left-color:var(--magenta); } .card.ext:hover .ttl{ color:var(--magenta); }

/* ---------- Excel I/O bar ---------- */
.iobar{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin:14px 0; padding:12px 14px;
  background:var(--bg-panel); border:1px solid var(--line); border-radius:6px; }
.iobar .lbl{ color:var(--muted); font-size:12px; }
.iobar .pill{ color:var(--cyan); font-size:12px; }
.filechip{ color:var(--phosphor); font-size:12px; }
input[type=file]{ display:none; }

/* ---------- Tablas ---------- */
.dtable{ width:100%; border-collapse:collapse; font-size:12.5px; margin-top:10px; }
.dtable th,.dtable td{ border:1px solid var(--line); padding:6px 9px; text-align:right; }
.dtable th{ background:#0b1421; color:var(--cyan); position:sticky; top:0; }
.dtable td:first-child,.dtable th:first-child{ text-align:left; color:var(--phosphor); }
.tablewrap{ max-height:420px; overflow:auto; border:1px solid var(--line); border-radius:6px; }

.exercises{ background:#0b1320; border:1px solid var(--line); border-left:3px solid var(--amber); border-radius:6px; padding:16px 20px; margin-top:30px; }
.exercises h3{ margin:0 0 8px; color:var(--amber); font-size:14px; letter-spacing:.05em; }
.exercises ol{ margin:0; padding-left:20px; font-family:var(--sans); color:#bac8d6; }
.exercises li{ margin:7px 0; } .exercises code{ font-family:var(--mono); color:var(--phosphor); }

.pager{ display:flex; justify-content:space-between; margin-top:46px; padding-top:18px; border-top:1px solid var(--line); }
.pager a{ font-size:13px; } .pager .dis{ color:var(--dim); }

.note{ font-family:var(--sans); font-size:13px; color:var(--muted); background:#0b1320; border:1px solid var(--line);
  border-radius:6px; padding:12px 14px; margin:14px 0; }
.note b{ color:var(--cyan); }

footer.foot{ position:relative; z-index:2; border-top:1px solid var(--line); padding:18px 38px; color:var(--dim); font-size:12px; }
footer.foot .foot-row{ display:flex; flex-wrap:wrap; gap:6px 22px; justify-content:space-between; align-items:center; }
footer.foot .credit{ color:var(--muted); }
footer.foot .credit b{ color:var(--phosphor); }
footer.foot .credit a{ color:var(--cyan); }
footer.foot .credit a:hover{ color:var(--phosphor); }

/* ---------- responsive ---------- */
.menu-toggle{ display:none; }
.sidebar-backdrop{ display:none; }

/* La barra de acciones de cada consola siempre puede envolver */
.rconsole .bar{ flex-wrap:wrap; }
.rconsole .bar .actions{ flex-wrap:wrap; }
.rconsole .bar .actions input[type=file]{ max-width:170px; font-size:11px; }

/* Tablets y pantallas medianas */
@media (max-width:900px){
  .shell{ grid-template-columns:1fr; }
  .sidebar{ position:fixed; left:0; top:40px; width:264px; max-width:84vw;
    transform:translateX(-100%); transition:transform .22s ease; z-index:40; }
  body.nav-open .sidebar{ transform:none; box-shadow:0 0 40px rgba(0,0,0,.6); }
  .sidebar-backdrop{ position:fixed; inset:40px 0 0 0; background:rgba(2,5,9,.6);
    z-index:35; opacity:0; pointer-events:none; transition:opacity .22s ease; }
  body.nav-open .sidebar-backdrop{ display:block; opacity:1; pointer-events:auto; }
  .menu-toggle{ display:inline-block; }
  .main{ padding:22px 18px 70px; }
  .rgrid.split{ grid-template-columns:1fr; }
  .rgrid.split .output-wrap,.rgrid.split .plotbox{ border-left:none; border-top:1px solid var(--line); }
  .hero h1{ font-size:36px; }
  footer.foot{ padding:16px 18px; }
}

/* Teléfonos */
@media (max-width:560px){
  body{ font-size:13px; }
  .statusbar{ gap:10px; padding:0 10px; }
  .statusbar .sep, .statusbar .term-label{ display:none; }       /* ahorra espacio */
  .statusbar .engine #engine-status{ max-width:96px; overflow:hidden;
    text-overflow:ellipsis; white-space:nowrap; }
  .main{ padding:18px 14px 64px; }
  h1.page{ font-size:25px; }
  .hero{ padding:30px 0 22px; }
  .hero h1{ font-size:29px; letter-spacing:-1px; }
  .hero .lead{ font-size:15px; }
  .cards{ grid-template-columns:1fr; }
  .editor textarea{ min-height:120px; font-size:13px; }
  .rconsole .bar .fname{ width:100%; margin:0 0 4px; }
  .rconsole .bar .actions{ margin-left:0; width:100%; }
  .btn{ padding:7px 9px; }                                       /* objetivos táctiles */
  .pager{ flex-direction:column; gap:12px; }
  .tablewrap{ -webkit-overflow-scrolling:touch; }
  .dtable{ font-size:12px; }
  footer.foot .foot-row{ flex-direction:column; align-items:flex-start; gap:8px; }
}

@media (prefers-reduced-motion: reduce){ *{ animation:none !important; transition:none !important; } .cursor{ animation:none; } }

/* ============================================================
   QueryLab — componentes específicos de bases de datos
   ============================================================ */

/* Selector de motor SQL / NoSQL en la barra de la consola */
.engine-pick{ display:flex; gap:6px; align-items:center; }
.engine-pick .dia{ font-size:11px; padding:3px 8px; border-radius:4px; border:1px solid var(--line);
  color:var(--muted); background:#0a1320; cursor:pointer; }
.engine-pick .dia.on{ color:var(--phosphor); border-color:#15402c; background:#0d2018; }

/* Resultados en grilla (filas afectadas / mensajes) */
.qmsg{ font-size:12.5px; padding:8px 12px; border-radius:4px; margin:6px 0; }
.qmsg.ok{ color:var(--phosphor); background:#0c1c14; border:1px solid #15402c; }
.qmsg.err{ color:var(--magenta); background:#1d0e16; border:1px solid #3a1326; }
.qmsg.info{ color:var(--cyan); background:#0a1622; border:1px solid #15324a; }

/* Tabla de resultados de consulta */
.qresult{ overflow:auto; max-height:460px; border:1px solid var(--line); border-radius:6px; margin-top:8px; }
.qresult table{ width:100%; border-collapse:collapse; font-size:12.5px; }
.qresult th,.qresult td{ border:1px solid var(--line); padding:6px 10px; text-align:left; white-space:nowrap; }
.qresult th{ background:#0b1421; color:var(--cyan); position:sticky; top:0; z-index:1; font-weight:700; }
.qresult tr:nth-child(even) td{ background:rgba(255,255,255,.012); }
.qresult td.null{ color:var(--dim); font-style:italic; }
.qresult td.num{ text-align:right; color:#bfe9d6; }

/* Visor de esquema (diagrama de tablas) */
.schema{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px; margin:18px 0; }
.tbl{ border:1px solid var(--line); border-radius:6px; background:var(--bg-elev); overflow:hidden; }
.tbl h4{ margin:0; padding:8px 12px; background:#0b1726; color:var(--phosphor); font-size:13px;
  border-bottom:1px solid var(--line); display:flex; justify-content:space-between; align-items:center; }
.tbl h4 .cnt{ color:var(--dim); font-weight:400; font-size:11px; }
.tbl ul{ list-style:none; margin:0; padding:6px 0; }
.tbl li{ padding:3px 12px; font-size:12px; color:var(--text); display:flex; justify-content:space-between; gap:10px; }
.tbl li .ty{ color:var(--muted); font-size:11px; }
.tbl li.pk{ color:var(--amber); } .tbl li.pk .ty::before{ content:"PK "; color:var(--amber); }
.tbl li.fk{ color:var(--cyan); } .tbl li.fk .ty::before{ content:"FK "; color:var(--cyan); }

/* Pista/explicación de seguridad */
.danger{ border:1px solid #3a1326; background:linear-gradient(180deg,#1a0c13,#120a10);
  border-radius:8px; padding:14px 16px; margin:16px 0; }
.danger .tag{ color:var(--magenta); font-weight:700; font-size:11px; letter-spacing:.12em;
  text-transform:uppercase; display:block; margin-bottom:6px; }
.safe{ border:1px solid #15402c; background:linear-gradient(180deg,#0c1c14,#0a160f);
  border-radius:8px; padding:14px 16px; margin:16px 0; }
.safe .tag{ color:var(--phosphor); font-weight:700; font-size:11px; letter-spacing:.12em;
  text-transform:uppercase; display:block; margin-bottom:6px; }

/* Chips de equivalencia de dialecto */
.dialects{ display:flex; flex-wrap:wrap; gap:10px; margin:14px 0; }
.dchip{ flex:1; min-width:160px; border:1px solid var(--line); border-radius:6px; padding:10px 12px;
  background:var(--bg-elev); }
.dchip .h{ font-size:11px; letter-spacing:.08em; text-transform:uppercase; margin-bottom:6px; }
.dchip.oracle .h{ color:var(--amber); } .dchip.mysql .h{ color:var(--cyan); }
.dchip.sqlite .h{ color:var(--phosphor); } .dchip.mongo .h{ color:var(--violet); }
.dchip code{ font-size:12px; color:var(--text); }

@media (max-width:560px){
  .qresult th,.qresult td{ white-space:normal; }
}

/* ============================================================
   Editor MER (Modelo Entidad-Relación) — plataforma central
   ============================================================ */
.mer-toolbar{ display:flex; flex-wrap:wrap; gap:8px; align-items:center; margin:12px 0 6px; }
.mer-sqlgroup{ display:inline-flex; gap:0; }
.mer-sqlgroup .btn{ border-top-right-radius:0; border-bottom-right-radius:0; }
.mer-dialect{ background:#0a1320; color:var(--cyan); border:1px solid var(--line); border-left:none;
  border-radius:0 var(--radius) var(--radius) 0; font-family:var(--mono); font-size:12px; padding:0 8px; cursor:pointer; }
.mer-exsel{ border:1px solid var(--line); border-left:1px solid var(--line);
  border-radius:var(--radius); color:var(--phosphor); max-width:230px; }

.mer-legend{ display:flex; flex-wrap:wrap; gap:18px; margin:0 0 12px; padding:8px 12px;
  border:1px solid var(--line); border-radius:6px; background:var(--bg-elev); }
.mer-legend .lg{ display:inline-flex; align-items:center; gap:7px; color:var(--muted); font-size:11.5px; }

.mer-wrap{ display:grid; grid-template-columns:1fr 320px; gap:14px; }
.mer-stage{ position:relative; border:1px solid var(--line); border-radius:8px; height:520px; overflow:hidden;
  background:radial-gradient(circle at 1px 1px, rgba(0,255,156,.06) 1px, transparent 0) 0 0/22px 22px, var(--bg-elev); }
#mer-svg{ position:absolute; inset:0; width:100%; height:100%; pointer-events:none; z-index:1; }
#mer-svg line, #mer-svg rect, #mer-svg circle, #mer-svg text{ pointer-events:auto; }
#mer-canvas{ position:absolute; inset:0; z-index:2; }

/* líneas y pata de gallo */
.rel{ stroke:var(--cyan); stroke-width:1.8; fill:none; }
.rel.dashed{ stroke-dasharray:6 4; }
.rel.sel{ stroke:var(--phosphor); stroke-width:2.4; }
.cf{ stroke:var(--cyan); stroke-width:1.8; fill:none; }
.cfo{ stroke:var(--cyan); stroke-width:1.8; fill:var(--bg-elev); }
.relverb-bg{ fill:#0a1320; stroke:var(--line); }
.relverb{ fill:var(--text); font:600 11px var(--mono); text-anchor:middle; }

/* cajas de entidad */
.mer-ent{ position:absolute; min-width:150px; max-width:260px; background:var(--bg-panel); border:1px solid var(--line);
  border-radius:6px; box-shadow:0 4px 14px rgba(0,0,0,.4); user-select:none; z-index:3; }
.mer-ent.sel{ border-color:var(--phosphor); box-shadow:0 0 0 1px var(--phosphor),0 6px 18px rgba(0,0,0,.55); }
.mer-ent.pick{ cursor:crosshair; } .mer-ent.pick .mer-eh{ background:#14233b; }
.mer-ent.first{ border-color:var(--amber); box-shadow:0 0 0 1px var(--amber); }
.mer-eh{ background:#0b1726; color:var(--phosphor); font-weight:700; font-size:13px; padding:7px 11px;
  border-bottom:1px solid var(--line); border-radius:6px 6px 0 0; cursor:grab; letter-spacing:.3px; }
.mer-ent ul{ list-style:none; margin:0; padding:5px 0; }
.mer-ent li{ display:flex; justify-content:space-between; gap:14px; padding:2px 11px; font-size:12px; }
.mer-ent li .an{ color:var(--text); }
.mer-ent li .aty{ color:var(--muted); font-size:10px; white-space:nowrap; }
.mer-ent li.pk .an{ color:var(--amber); font-weight:600; }
.mer-ent li.pk .an::before{ content:"🔑 "; font-size:9px; }
.mer-ent li.fk .an{ color:var(--cyan); }
.mer-ent li.fk .an::before{ content:"⌖ "; }

/* panel lateral */
.mer-side{ border:1px solid var(--line); border-radius:8px; background:var(--bg-elev); padding:12px;
  max-height:520px; overflow:auto; }
.mer-hint{ color:var(--muted); font-size:12px; line-height:1.6; }
.mer-phead{ display:flex; gap:8px; margin-bottom:10px; align-items:center; }
.mer-name{ flex:1; min-width:0; background:#0a1320; border:1px solid var(--line); color:var(--phosphor);
  font-weight:700; font-family:var(--mono); border-radius:4px; padding:6px 8px; }
.mer-rel-title{ flex:1; color:var(--text); font-size:13px; }
.btn.sm{ padding:5px 9px; font-size:11px; }
.btn.wfull{ width:100%; margin-top:6px; }

/* editor de atributos */
.mer-attrs{ display:flex; flex-direction:column; gap:5px; margin-bottom:8px; }
.mer-attr{ border:1px solid var(--line); border-radius:5px; background:#0a1320; }
.mer-attr.open{ border-color:#1d2c40; }
.mer-attr-top{ display:flex; align-items:center; gap:4px; padding:4px; }
.mer-exp{ background:none; border:none; color:var(--muted); cursor:pointer; font-size:11px; width:18px; flex:none; }
.mer-in{ background:#070d16; border:1px solid var(--line); color:var(--text); font-family:var(--mono);
  font-size:11.5px; border-radius:4px; padding:5px 6px; min-width:0; }
.mer-in.name{ flex:1; } .mer-in.ty{ width:84px; flex:none; color:var(--cyan); } .mer-in.tiny{ width:52px; flex:none; }
.mer-attr-det{ display:none; flex-direction:column; gap:7px; padding:0 8px 9px 26px; }
.mer-attr.open .mer-attr-det{ display:flex; }
.mer-row{ display:flex; align-items:center; gap:6px; flex-wrap:wrap; }
.mer-lab{ color:var(--muted); font-size:10.5px; min-width:64px; }
.mer-row .mer-in{ flex:1; }
.mer-flags{ display:flex; flex-wrap:wrap; gap:6px; }
.mer-chk{ display:inline-flex; align-items:center; gap:5px; cursor:pointer; color:var(--muted); font-size:10.5px; }
.mer-chk .box{ width:15px; height:15px; border:1px solid var(--line); border-radius:3px; background:#070d16;
  display:inline-flex; align-items:center; justify-content:center; font-size:10px; color:var(--phosphor); }
.mer-chk.on{ color:var(--text); } .mer-chk.on .box{ border-color:var(--phosphor); }

.mer-tg{ font-size:10px; font-weight:700; padding:5px 7px; border-radius:4px; border:1px solid var(--line);
  background:#070d16; color:var(--dim); cursor:pointer; flex:none; }
.mer-tg.on.amber{ background:var(--amber); border-color:var(--amber); color:#0b0f14; }
.mer-tg.on.cyan{ background:var(--cyan); border-color:var(--cyan); color:#0b0f14; }
.mer-x{ background:none; border:none; color:var(--dim); cursor:pointer; font-size:12px; flex:none; padding:0 4px; }
.mer-x:hover{ color:var(--magenta); }

/* selector de cardinalidad (pata de gallo) */
.mer-epick{ margin:8px 0; }
.mer-eprow{ display:grid; grid-template-columns:1fr 1fr; gap:5px; margin-top:5px; }
.mer-ep{ display:flex; flex-direction:column; align-items:center; gap:2px; padding:7px 4px; border:1px solid var(--line);
  border-radius:5px; background:#0a1320; color:var(--muted); cursor:pointer; }
.mer-ep:hover{ border-color:var(--dim); }
.mer-ep.on{ border-color:var(--phosphor); background:#0d1b2b; color:var(--text); }
.mer-ep .s{ font-size:15px; color:var(--cyan); font-weight:700; }
.mer-ep .l{ font-size:9.5px; }

#mer-output{ margin-top:14px; }
.mer-outbar{ display:flex; gap:8px; margin-top:8px; }
#mer-toast{ position:fixed; left:50%; bottom:28px; transform:translateX(-50%) translateY(20px);
  background:#0b1726; border:1px solid var(--phosphor); color:var(--text); padding:10px 16px; border-radius:6px;
  font-size:13px; z-index:80; opacity:0; transition:.25s; pointer-events:none; box-shadow:0 6px 20px rgba(0,0,0,.5); }
#mer-toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }

@media (max-width:860px){
  .mer-wrap{ grid-template-columns:1fr; } .mer-stage{ height:420px; }
  .mer-side{ max-height:none; }
}

/* ===== PWA: tarjeta flotante de instalación ===== */
.pwa-install-card {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 120;
  max-width: 380px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 16px;
  background: rgba(7, 16, 26, .96);
  border: 1px solid rgba(0, 255, 156, .28);
  box-shadow: 0 18px 46px rgba(0, 0, 0, .46), 0 0 28px rgba(0, 255, 156, .10);
  backdrop-filter: blur(10px);
}

.pwa-install-card[hidden] {
  display: none !important;
}

.pwa-install-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--phosphor), var(--cyan));
  color: #07101a;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 0 22px rgba(0, 255, 156, .22);
}

.pwa-install-body strong {
  display: block;
  color: #eaf2fa;
  line-height: 1.2;
  margin-bottom: 5px;
}

.pwa-install-body p {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.45;
  margin: 0 0 10px;
}

.pwa-install-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pwa-install-actions .btn {
  font-size: 12px;
  padding: 7px 10px;
}

.pwa-primary {
  border-color: var(--phosphor);
  background: var(--phosphor);
  color: #061018;
}

.pwa-primary:hover {
  filter: brightness(1.08);
}

.pwa-secondary {
  border-color: var(--line);
  background: #0a1320;
  color: var(--muted);
}

.pwa-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

@media (max-width: 620px) {
  .pwa-install-card {
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-width: none;
  }
}