:root{
  --bg:#f6f7fb; --card:#fff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --pri:#0f172a; --ok:#16a34a; --err:#dc2626;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:14px}

/* Topbar */
.topbar{display:flex;justify-content:space-between;align-items:center;background:#0f172a;color:#fff;padding:12px 24px}
.topbar .brand{font-weight:700}
.topbar nav a{color:#cbd5e1;text-decoration:none;margin-left:18px;font-size:13px}
.topbar nav a:hover{color:#fff}

/* Layout */
.container{max-width:1100px;margin:0 auto;padding:24px}
.container.narrow{max-width:760px}
h1{font-size:22px;margin:0 0 16px}
h3{font-size:15px;margin:0 0 12px}
.muted{color:var(--muted);margin:0 0 12px}

/* Login */
.login-body{background:#0f172a;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-card{background:#fff;padding:32px;border-radius:10px;width:100%;max-width:380px;box-shadow:0 10px 40px rgba(0,0,0,.2)}
.login-card h1{margin:0 0 4px;font-size:20px}
.login-card .sub{color:var(--muted);margin:0 0 20px;font-size:13px}
.login-card label{display:block;font-size:12px;font-weight:600;margin:12px 0 4px;color:#334155}

/* Inputs */
input[type=text],input[type=email],input[type=password],input[type=search],select,textarea{
  width:100%;padding:9px 11px;border:1px solid #cbd5e1;border-radius:6px;font:inherit;background:#fff;color:var(--ink)
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px rgba(15,23,42,.08)}
textarea{min-height:100px;resize:vertical}
button{padding:9px 16px;background:var(--pri);color:#fff;border:0;border-radius:6px;font:inherit;font-weight:600;cursor:pointer}
button:hover{background:#1e293b}
.btn-link{color:var(--muted);text-decoration:none;font-size:13px;padding:9px 0;display:inline-block}
.btn-link:hover{color:var(--ink)}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:0 0 18px}
.stat{background:var(--card);border:1px solid var(--line);padding:14px;border-radius:8px}
.stat span{display:block;font-size:12px;color:var(--muted)}
.stat strong{font-size:22px;display:block;margin-top:4px}

/* Filtros */
.filters{display:flex;gap:8px;margin:0 0 14px;flex-wrap:wrap;align-items:center;background:var(--card);border:1px solid var(--line);padding:12px;border-radius:8px}
.filters input[type=search]{flex:1;min-width:200px}
.filters select{min-width:160px}

/* Tabla */
.tabla{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.tabla th{text-align:left;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;padding:10px 14px;border-bottom:1px solid var(--line);background:#f8fafc}
.tabla td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.tabla tr:last-child td{border-bottom:0}
.tabla tbody tr{cursor:pointer}
.tabla tbody tr:hover{background:#f8fafc}
.tabla small{color:var(--muted)}

/* Tags */
.tag{display:inline-block;font-size:11px;font-weight:600;padding:3px 9px;border-radius:99px;background:#e2e8f0;color:#334155;letter-spacing:.02em}
.pri-baja   {background:#dbeafe;color:#1e40af}
.pri-media  {background:#fef3c7;color:#92400e}
.pri-alta   {background:#fed7aa;color:#9a3412}
.pri-urgente{background:#fee2e2;color:#991b1b}
.est-abierto    {background:#dbeafe;color:#1e40af}
.est-en_progreso{background:#fef3c7;color:#92400e}
.est-resuelto   {background:#dcfce7;color:#166534}
.est-cerrado    {background:#e2e8f0;color:#475569}
.plat-nexalink  {background:#ede9fe;color:#5b21b6}
.plat-smartcoach{background:#cffafe;color:#155e75}

/* Cards y respuestas */
.card{background:var(--card);border:1px solid var(--line);padding:18px;border-radius:8px;margin:0 0 16px}
.ticket-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin:0 0 12px;flex-wrap:wrap}
.ticket-tags{display:flex;gap:6px;flex-wrap:wrap}
.resp{padding:12px 14px;border-radius:6px;margin:0 0 10px;border:1px solid var(--line)}
.resp:last-child{margin-bottom:0}
.resp-head{font-size:12px;color:var(--muted);margin:0 0 6px}
.resp-body{white-space:pre-wrap;line-height:1.5}
.resp-cliente{background:#f8fafc}
.resp-admin{background:#eef2ff;border-color:#c7d2fe}

/* Inline form */
.inline-form{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.inline-form select{width:auto;min-width:160px}
.check{font-size:13px;color:#334155;display:flex;align-items:center;gap:6px}

/* Alerts */
.alert{padding:10px 14px;border-radius:6px;margin:0 0 14px;font-size:14px}
.alert.ok {background:#dcfce7;color:#166534}
.alert.err{background:#fee2e2;color:#991b1b}

.empty{background:var(--card);border:1px dashed var(--line);padding:30px;text-align:center;color:var(--muted);border-radius:8px}

/* Métricas */
.metricas-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:0 0 16px}
.big-num{font-size:32px;font-weight:700;color:var(--ink);margin:8px 0 4px}
.rating-bars{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.rating-row{display:flex;align-items:center;gap:10px}
.rating-row > span:first-child{width:60px;font-size:14px}
.rating-row > span:last-child{width:36px;text-align:right}
.rating-bar{flex:1;height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden}
.rating-bar > div{height:100%;background:linear-gradient(90deg,#0f172a,#475569)}

/* Bar chart */
.bar-chart{display:flex;align-items:flex-end;gap:8px;height:180px;padding:10px 0;overflow-x:auto}
.bar-col{flex:1;min-width:50px;display:flex;flex-direction:column;align-items:center;gap:4px}
.bar-num{font-size:12px;color:var(--muted);min-height:14px}
.bar{width:100%;max-width:40px;background:#0f172a;border-radius:3px 3px 0 0;transition:opacity .15s}
.bar:hover{opacity:.7}
.bar-lbl{font-size:11px;color:var(--ink);font-weight:600}
.bar-yr{font-size:10px;color:var(--muted)}

/* Form helpers */
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:560px){.row-2{grid-template-columns:1fr}}

/* Adjuntos */
.adjuntos{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.adjunto{display:block;text-decoration:none;color:var(--muted);font-size:12px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;transition:transform .15s ease}
.adjunto:hover{transform:translateY(-1px);border-color:var(--pri)}
.adjunto img{display:block;width:160px;height:120px;object-fit:cover}
.adjunto span{display:block;padding:6px 8px}

@media(max-width:640px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .topbar{flex-direction:column;gap:8px}
  .topbar nav a{margin:0 8px}
}