:root{
  --bg-primary:#181818;--bg-secondary:#222;--bg-card:#2a2a2a;--bg-hover:#333;
  --text-primary:#e4e4e4;--text-secondary:#909090;
  --border-color:#3d3d3d;--border-top-light:hsla(0,0%,100%,.08);
  --gradient:linear-gradient(135deg,#667eea,#764ba2);
  --accent:#5b8dee;--accent-hover:#7ca3f5;
  --input-bg:#1e1e1e;--input-border:#454545;
  --success:#22c55e;--danger:#ef4444;--warning:#f59e0b;
  --shadow-card:0 8px 24px rgba(0,0,0,.55),0 2px 6px rgba(0,0,0,.4),inset 0 1px 0 hsla(0,0%,100%,.05);
  --shadow-inset:inset 3px 3px 8px rgba(0,0,0,.55),inset -1px -1px 3px hsla(0,0%,100%,.03);
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg-primary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:.92rem;min-height:100vh}

/* ── Login ── */
.login-wrap{align-items:center;display:flex;justify-content:center;min-height:100vh}
.login-card{background:linear-gradient(145deg,#2f2f2f,#232323);border:1px solid var(--border-color);border-top-color:var(--border-top-light);border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.7),0 4px 16px rgba(0,0,0,.5),inset 0 1px 0 hsla(0,0%,100%,.07);padding:36px 40px;width:100%;max-width:400px;margin:20px}
.login-logo{text-align:center;margin-bottom:24px}
.login-logo h1{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-size:1.5rem;font-weight:700}
.login-logo p{color:var(--text-secondary);font-size:.82rem;margin-top:4px}

/* ── Admin layout ── */
.layout{display:flex;min-height:100vh;flex-direction:column}
.topbar{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:10px 24px;gap:12px}
.topbar-brand{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-size:1.05rem;font-weight:700;white-space:nowrap}
.topbar-user{color:var(--text-secondary);font-size:.83rem}
.content{flex:1;padding:20px 24px;max-width:1300px;margin:0 auto;width:100%}

/* ── Tabs ── */
.tabs{display:flex;gap:5px;background:linear-gradient(180deg,#1a1a2e,#16162a);border:1px solid rgba(0,0,0,.6);border-top-color:hsla(0,0%,100%,.07);border-radius:10px;padding:6px;margin-bottom:20px;box-shadow:inset 0 3px 10px rgba(0,0,0,.45)}
.tab-btn{align-items:center;background:hsla(0,0%,100%,.04);border:1px solid hsla(0,0%,100%,.07);border-top-color:hsla(0,0%,100%,.13);border-radius:7px;box-shadow:0 4px 0 rgba(0,0,0,.5),0 6px 10px rgba(0,0,0,.35),inset 0 1px 0 hsla(0,0%,100%,.1),inset 0 -2px 6px rgba(0,0,0,.3);color:var(--text-secondary);cursor:pointer;display:inline-flex;font-size:.85rem;font-weight:500;gap:6px;padding:8px 20px;text-decoration:none;transition:transform .08s,box-shadow .08s,background .12s,color .12s}
.tab-btn:hover{background:hsla(0,0%,100%,.08);color:var(--text-primary)}
.tab-btn.active{background:linear-gradient(145deg,rgba(99,102,241,.28),rgba(59,130,246,.18));border-color:rgba(160,140,230,.22) rgba(99,102,241,.35) rgba(99,102,241,.35);box-shadow:0 1px 0 rgba(0,0,0,.5),inset 0 3px 10px rgba(0,0,0,.4);color:var(--accent);font-weight:600;transform:translateY(3px)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ── Cards ── */
.card{background:var(--bg-card);border:1.5px solid #606060;border-top-color:hsla(0,0%,100%,.18);border-radius:10px;box-shadow:var(--shadow-card);margin-bottom:16px;overflow:hidden}
.card-header{align-items:center;background:linear-gradient(180deg,#303030 0,var(--bg-secondary) 100%);border-bottom:1px solid var(--border-color);color:var(--text-primary);display:flex;font-size:.95rem;font-weight:600;gap:10px;justify-content:space-between;padding:10px 16px}
.card-body{padding:16px 18px}

/* ── Table ── */
.data-table{border-collapse:collapse;width:100%}
.data-table th,.data-table td{border-bottom:1px solid var(--border-color);font-size:.85rem;padding:9px 12px;text-align:left}
.data-table th{background:linear-gradient(180deg,#3c3c3c,#202020);border-top:1px solid hsla(0,0%,100%,.1);box-shadow:inset 0 1px 0 hsla(0,0%,100%,.1),inset 0 -1px 0 rgba(0,0,0,.5),0 3px 0 rgba(0,0,0,.4);color:#c4c8d4;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.data-table tbody tr{background:linear-gradient(180deg,hsla(0,0%,100%,.03),rgba(0,0,0,.06));box-shadow:inset 0 1px 0 hsla(0,0%,100%,.05);transition:background .12s}
.data-table tbody tr:nth-child(even){background:linear-gradient(180deg,rgba(0,0,0,.12),rgba(0,0,0,.18))}
.data-table tbody tr:hover{background:var(--bg-hover)}
.table-wrap{overflow-x:auto}

/* ── Buttons ── */
.btn{cursor:pointer;font-size:.88rem;font-weight:600;outline:none;position:relative;-webkit-tap-highlight-color:transparent;border-radius:8px;box-shadow:0 6px 0 rgba(0,0,0,.55),0 8px 12px rgba(0,0,0,.45),inset 0 1px 0 hsla(0,0%,100%,.22),inset 0 -4px 10px rgba(0,0,0,.35);text-shadow:0 1px 2px rgba(0,0,0,.6);transition:transform .08s,box-shadow .08s,filter .08s;overflow:hidden}
.btn::before{background:linear-gradient(180deg,hsla(0,0%,100%,.3),hsla(0,0%,100%,.02));border-radius:5px 5px 50% 50%/5px 5px 25% 25%;content:"";height:44%;left:1px;pointer-events:none;position:absolute;right:1px;top:1px;z-index:1}
.btn:active{box-shadow:0 1px 0 rgba(0,0,0,.45),0 2px 4px rgba(0,0,0,.4),inset 0 2px 8px rgba(0,0,0,.55);transform:translateY(5px)}
.btn-primary{background:linear-gradient(180deg,hsla(0,0%,100%,.14),rgba(80,100,200,.06) 35%,rgba(0,0,0,.22) 100%),var(--gradient);border:1px solid rgba(118,75,162,.55);border-top-color:rgba(150,130,220,.3);color:#fff;padding:9px 22px}
.btn-primary:hover{filter:brightness(1.1)}
.btn-secondary{background:linear-gradient(180deg,hsla(0,0%,100%,.13),rgba(80,80,80,.06) 35%,rgba(0,0,0,.28)),linear-gradient(180deg,#5a6474,#4b5563);border:1px solid rgba(0,0,0,.45);border-top-color:hsla(0,0%,100%,.11);color:#fff;padding:8px 16px}
.btn-secondary:hover{filter:brightness(1.1)}
.btn-sm{font-size:.78rem;padding:5px 12px}
.btn-danger{background:linear-gradient(180deg,hsla(0,0%,100%,.1),rgba(100,20,20,.08) 35%,rgba(0,0,0,.28)),linear-gradient(180deg,#3d1c1c,#331616);border:1px solid rgba(239,68,68,.5);border-top-color:rgba(239,68,68,.22);color:var(--danger);font-size:.78rem;padding:5px 11px}
.btn-danger:hover{color:#fff;filter:brightness(1.15)}
.btn-success{background:linear-gradient(180deg,hsla(0,0%,100%,.15),rgba(20,100,50,.08) 35%,rgba(0,0,0,.22)),linear-gradient(180deg,#29d96a,#16a34a);border:1px solid rgba(0,0,0,.45);border-top-color:hsla(0,0%,100%,.15);color:#fff;padding:9px 22px}
.btn-success:hover{filter:brightness(1.1)}
.btn-logout{background:transparent;border:1px solid rgba(239,68,68,.45);border-radius:20px;box-shadow:0 4px 0 rgba(0,0,0,.45),0 6px 10px rgba(0,0,0,.35),inset 0 1px 0 hsla(0,0%,100%,.1);color:var(--danger);font-size:.82rem;padding:5px 14px;cursor:pointer;font-weight:600;transition:.12s}
.btn-logout:hover{background:rgba(239,68,68,.15);color:#fff}

/* ── Forms ── */
.form-group{margin-bottom:14px}
.form-group label{color:#b8bcc8;display:block;font-size:.79rem;font-weight:700;letter-spacing:.05em;margin-bottom:5px;text-transform:uppercase}
.form-control{background:var(--input-bg);border:1px solid;border-color:#111 #3a3a3a #3a3a3a #111;border-radius:8px;box-shadow:var(--shadow-inset);color:var(--text-primary);font-size:.88rem;padding:8px 12px;width:100%;transition:box-shadow .15s,border-color .15s}
.form-control:focus{border-color:var(--accent);box-shadow:var(--shadow-inset),0 0 0 2px rgba(91,141,238,.2);outline:none}
select.form-control{-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23888' stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-position:right 10px center;background-repeat:no-repeat;padding-right:32px}
select.form-control option{background:var(--bg-card)}
.form-row{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ── Modal ── */
.modal{align-items:center;background:rgba(0,0,0,.75);display:none;height:100%;justify-content:center;left:0;position:fixed;top:0;width:100%;z-index:10}
.modal.open{display:flex}
.modal-content{background:linear-gradient(145deg,#2f2f2f,#252525);border:1px solid var(--border-color);border-top-color:var(--border-top-light);border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.7),inset 0 1px 0 hsla(0,0%,100%,.06);max-height:90vh;max-width:560px;overflow-y:auto;width:90%}
.modal-header{align-items:center;background:linear-gradient(180deg,#303030,var(--bg-secondary));border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;padding:12px 18px}
.modal-header h3{font-size:.95rem;font-weight:600}
.modal-body{padding:18px}
.modal-footer{background:linear-gradient(0deg,#282828,var(--bg-secondary));border-top:1px solid var(--border-color);display:flex;gap:10px;justify-content:flex-end;padding:12px 18px}
.modal-close{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:22px;line-height:1}
.modal-close:hover{color:var(--text-primary)}

/* ── Badges ── */
.badge{border-radius:12px;box-shadow:inset 0 1px 3px rgba(0,0,0,.3);display:inline-block;font-size:.68rem;font-weight:700;padding:3px 9px}
.badge-on{background:rgba(34,197,94,.2);border:1px solid rgba(34,197,94,.4);color:#86efac}
.badge-off{background:hsla(220,9%,46%,.2);border:1px solid hsla(220,9%,46%,.4);color:#d1d5db}
.badge-admin{background:rgba(239,68,68,.2);border:1px solid rgba(239,68,68,.4);color:#fca5a5}
.badge-tecnico{background:rgba(6,182,212,.2);border:1px solid rgba(6,182,212,.4);color:#67e8f9}
.badge-operador{background:rgba(34,197,94,.2);border:1px solid rgba(34,197,94,.4);color:#86efac}
.badge-jefe_tecnicos{background:rgba(245,158,11,.2);border:1px solid rgba(245,158,11,.4);color:#fcd34d}

/* ── Alerts ── */
.alert{border-radius:8px;font-size:.85rem;margin-bottom:14px;padding:9px 12px;display:none}
.alert-error{background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.3);color:#fca5a5}
.alert-success{background:rgba(34,197,94,.15);border:1px solid rgba(34,197,94,.3);color:#86efac}
.alert.show{display:block}

/* ── Secret key box ── */
.secret-box{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:7px;box-shadow:var(--shadow-inset);color:var(--accent);font-family:monospace;font-size:.75rem;padding:8px 10px;word-break:break-all}

/* ── Floating notification ── */
.toast{background:linear-gradient(135deg,#1ea550,#16a34a);border-radius:8px;border-top:1px solid hsla(0,0%,100%,.15);bottom:18px;box-shadow:0 6px 0 rgba(0,0,0,.35),0 8px 20px rgba(0,0,0,.5);color:#fff;font-size:.88rem;font-weight:600;padding:10px 18px;position:fixed;right:18px;z-index:20;display:none}
.toast.err{background:linear-gradient(135deg,#c0392b,#991b1b)}
.toast.show{display:block}

@media(max-width:640px){
  .content{padding:14px}
  .login-card{padding:28px 22px}
  .form-row{grid-template-columns:1fr}
  .topbar{padding:8px 14px}
}