:root{
  --bg:#12161a;
  --panel:#1b2127;
  --panel-alt:#212831;
  --hairline:#2c343d;
  --hairline-soft:#232a31;
  --text-primary:#edf1f4;
  --text-secondary:#8c99a6;
  --text-dim:#5c6670;
  --accent-ok:#45d2b8;
  --accent-heat:#f5a524;
  --accent-cool:#4ea1f5;
  --accent-alarm:#e5484d;
  --accent-alarm-glow:rgba(229,72,77,.35);
  --radius:10px;
  --font-display:'Space Grotesk',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{
  background:
    radial-gradient(circle at 15% 0%, #1a2129 0%, var(--bg) 45%),
    var(--bg);
  color:var(--text-primary);
  font-family:var(--font-body);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--accent-heat);color:#12161a;}
.hidden{display:none !important;}

/* ---------- topbar (igual ao AP) ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;border-bottom:1px solid var(--hairline);
  background:rgba(27,33,39,.6);backdrop-filter:blur(6px);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px;cursor:pointer;}
.brand-mark{
  width:34px;height:34px;border-radius:8px;
  background:#f4f4f4;
  border:1px solid var(--hairline);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.brand-mark img{width:100%;height:100%;object-fit:contain;}
.brand-text h1{font-family:var(--font-display);font-size:16px;font-weight:600;letter-spacing:.2px;}
.brand-text span{font-size:11px;color:var(--text-dim);letter-spacing:.4px;text-transform:uppercase;}
.top-status{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.status-pill{
  display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-secondary);
  padding:6px 12px;border:1px solid var(--hairline);border-radius:20px;font-family:var(--font-mono);
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--accent-ok);box-shadow:0 0 8px var(--accent-ok);}
.dot.warn{background:var(--accent-heat);box-shadow:0 0 8px var(--accent-heat);}
.dot.alarm{background:var(--accent-alarm);box-shadow:0 0 8px var(--accent-alarm);}
.dot.off{background:var(--text-dim);box-shadow:none;}
.unit-toggle{
  display:flex;border:1px solid var(--hairline);border-radius:8px;overflow:hidden;font-family:var(--font-mono);font-size:12px;
  flex:0 0 auto;
}
.unit-toggle button{
  background:transparent;border:none;color:var(--text-secondary);
  padding:8px 18px;cursor:pointer;min-width:52px;min-height:36px;white-space:nowrap;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;
}
.unit-toggle button.active{background:var(--accent-heat);color:#12161a;font-weight:700;}
.logout-btn{
  background:transparent;border:1px solid var(--hairline);color:var(--text-secondary);
  padding:7px 14px;border-radius:8px;font-size:12px;cursor:pointer;font-family:var(--font-body);
}
.logout-btn:hover{border-color:var(--accent-alarm);color:var(--accent-alarm);}

/* ---------- layout ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:28px;}
.section-title{
  font-family:var(--font-display);font-size:13px;text-transform:uppercase;letter-spacing:1.2px;
  color:var(--text-dim);margin:32px 0 14px;display:flex;align-items:center;gap:10px;
}
.section-title::after{content:'';flex:1;height:1px;background:var(--hairline);}

/* ---------- home: grade de termostatos (mesmo padrao do gauge-card) ---------- */
.device-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;}
.device-card{
  background:linear-gradient(180deg,var(--panel-alt),var(--panel));
  border:1px solid var(--hairline);border-radius:var(--radius);padding:18px 20px;
  position:relative;overflow:hidden;cursor:pointer;transition:border-color .2s;
}
.device-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--card-accent,var(--accent-ok));}
.device-card:hover{border-color:var(--card-accent,var(--accent-ok));}
.device-card .dcard-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px;}
.device-card .dcard-name{font-weight:600;font-size:14px;}
.device-card .dcard-sub{font-size:11px;color:var(--text-dim);font-family:var(--font-mono);margin-top:2px;}
.device-card .dcard-temp{font-family:var(--font-mono);font-weight:700;font-size:28px;color:var(--card-accent,var(--accent-ok));margin:6px 0 2px;}
.device-card .dcard-spark{width:100%;height:34px;display:block;margin-top:8px;}
.empty-state{color:var(--text-dim);padding:40px;text-align:center;font-size:13px;}
.pair-btn{
  background:transparent;border:1px dashed var(--hairline);color:var(--text-dim);
  padding:8px 16px;border-radius:8px;font-family:var(--font-mono);font-size:12px;cursor:pointer;
}
.pair-btn:hover{border-color:var(--accent-ok);color:var(--accent-ok);}

/* ---------- sensor gauges ---------- */
.sensors{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;}
.gauge-card{
  background:linear-gradient(180deg,var(--panel-alt),var(--panel));
  border:1px solid var(--hairline);border-radius:var(--radius);padding:20px 22px;
  position:relative;overflow:hidden;
}
.gauge-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--gauge-accent,var(--accent-ok));
}
.gauge-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px;}
.gauge-name{font-size:13px;color:var(--text-secondary);font-weight:600;}
.gauge-sub{font-size:11px;color:var(--text-dim);font-family:var(--font-mono);margin-top:2px;}
.gauge-tag{
  font-size:10px;padding:3px 8px;border-radius:12px;font-family:var(--font-mono);
  border:1px solid var(--hairline);color:var(--text-dim);
}
.bezel{
  background:#0d1114;border:1px solid var(--hairline);border-radius:8px;
  padding:14px 16px;display:flex;align-items:baseline;gap:6px;
  box-shadow:inset 0 2px 6px rgba(0,0,0,.5);
}
.bezel .value{
  font-family:var(--font-mono);font-weight:700;font-size:34px;color:var(--gauge-accent,var(--accent-ok));
  letter-spacing:.5px;
}
.bezel .deg{font-family:var(--font-mono);font-size:16px;color:var(--text-dim);}
.gauge-foot{display:flex;justify-content:space-between;margin-top:12px;font-size:11px;color:var(--text-dim);font-family:var(--font-mono);}

/* ---------- grafico (novo nesta variante, no mesmo padrao visual) ---------- */
.chart-card{
  background:linear-gradient(180deg,var(--panel-alt),var(--panel));
  border:1px solid var(--hairline);border-radius:var(--radius);padding:20px 22px;margin-top:16px;
}
.chart-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;}
.range-buttons{display:flex;gap:6px;font-family:var(--font-mono);font-size:11px;}
.range-buttons button{
  background:transparent;border:1px solid var(--hairline);color:var(--text-secondary);
  padding:6px 12px;border-radius:8px;cursor:pointer;
}
.range-buttons button.active{background:var(--accent-cool);border-color:var(--accent-cool);color:#0d1114;font-weight:700;}
.chart-card canvas{max-height:280px;}
.chart-stats{display:flex;gap:18px;flex-wrap:wrap;margin-top:10px;color:var(--text-dim);font-size:11px;font-family:var(--font-mono);}

/* ---------- eventos ---------- */
.events-box{font-size:12px;color:var(--text-secondary);font-family:var(--font-mono);line-height:1.9;max-height:200px;overflow-y:auto;}

/* ---------- relay grid ---------- */
.relays{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;}
.relay-card{
  background:var(--panel);border:1px solid var(--hairline);border-radius:var(--radius);
  padding:16px 18px;position:relative;transition:border-color .2s;
}
.relay-card.on{border-color:var(--relay-color,var(--accent-heat));}
.relay-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
.relay-id{font-family:var(--font-mono);font-size:11px;color:var(--text-dim);}
.led{
  width:12px;height:12px;border-radius:50%;background:#2a3138;border:1px solid var(--hairline);
  transition:all .2s;
}
.relay-card.on .led{background:var(--relay-color,var(--accent-heat));box-shadow:0 0 10px var(--relay-color,var(--accent-heat));border-color:transparent;}
.relay-name{font-weight:600;font-size:14px;margin-bottom:4px;}
.relay-name input{background:transparent;border:none;color:var(--text-primary);font:inherit;font-weight:600;width:100%;padding:0;}
.relay-name input:focus{outline:none;border-bottom:1px dashed var(--accent-heat);}
.relay-meta{font-size:11px;color:var(--text-secondary);font-family:var(--font-mono);line-height:1.6;}
.relay-card.alarm{
  background:linear-gradient(180deg,#241a1c,var(--panel));border-color:var(--accent-alarm);
  grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;
}
.relay-card.alarm.tripped{box-shadow:0 0 0 1px var(--accent-alarm),0 0 24px var(--accent-alarm-glow);}
.relay-card.alarm .relay-name{font-family:var(--font-display);font-size:15px;}
.relay-card.alarm .led{background:var(--accent-alarm);box-shadow:0 0 10px var(--accent-alarm);border-color:transparent;}
.relay-card.alarm.tripped .led{animation:pulse 1s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.3;}}
.alarm-desc{font-size:11px;color:var(--text-secondary);max-width:420px;}
.cfg-btn{
  width:100%;margin-top:12px;background:transparent;border:1px dashed var(--hairline);
  color:var(--text-dim);font-size:11px;padding:6px;border-radius:6px;cursor:pointer;font-family:var(--font-mono);
}
.cfg-btn:hover{border-color:var(--accent-heat);color:var(--accent-heat);}

/* ---------- footer ---------- */
.footer{
  margin-top:48px;padding:22px 28px;border-top:1px solid var(--hairline);
  display:flex;justify-content:space-between;align-items:center;color:var(--text-dim);font-size:11px;
  font-family:var(--font-mono);
}

/* ---------- login ---------- */
.login-screen{
  position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px;box-sizing:border-box;
}
.login-box{
  width:420px;max-width:100%;padding:20px 20px;background:var(--panel);border:1px solid var(--hairline);border-radius:14px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);box-sizing:border-box;
}
.login-mark{width:300px;height:auto;margin:0 auto 18px;}
.login-mark img{width:80%;height:auto;align-self:center;display:block;margin:0 auto;}
.login-box h2{text-align:center;font-family:var(--font-display);font-size:17px;margin-bottom:4px;}
.login-box p{text-align:center;font-size:12px;color:var(--text-dim);margin-bottom:22px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:11px;color:var(--text-secondary);margin-bottom:6px;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.4px;}
.field input,.field select{
  width:100%;background:#0d1114;border:1px solid var(--hairline);border-radius:8px;color:var(--text-primary);
  padding:10px 12px;font-family:var(--font-mono);font-size:13px;outline:none;
}
.field input:focus,.field select:focus{border-color:var(--accent-heat);}
.login-btn{
  width:100%;padding:11px;margin-top:6px;background:var(--accent-heat);border:none;border-radius:8px;
  color:#12161a;font-weight:700;font-size:13px;cursor:pointer;font-family:var(--font-body);
}
.login-btn:hover{filter:brightness(1.08);}
.login-err{color:var(--accent-alarm);font-size:11px;text-align:center;margin-top:10px;min-height:14px;}
.login-foot{text-align:center;font-size:10px;color:var(--text-dim);margin-top:18px;font-family:var(--font-mono);}

/* ---------- modais (mesmo padrao do AP) ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(6,8,10,.7);display:none;align-items:center;justify-content:center;z-index:90;padding:16px;box-sizing:border-box;}
.modal-bg.open{display:flex;}
.modal{width:380px;max-width:100%;max-height:calc(100vh - 32px);overflow-y:auto;background:var(--panel);border:1px solid var(--hairline);border-radius:12px;padding:24px;box-sizing:border-box;}
.modal h3{font-family:var(--font-display);font-size:15px;margin-bottom:16px;}
.modal .field select,.modal .field input{
  width:100%;background:#0d1114;border:1px solid var(--hairline);border-radius:8px;color:var(--text-primary);
  padding:9px 11px;font-family:var(--font-mono);font-size:12px;box-sizing:border-box;
}
.modal-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.modal-actions button{flex:1 1 100px;padding:10px;border-radius:8px;border:1px solid var(--hairline);background:transparent;color:var(--text-secondary);cursor:pointer;font-family:var(--font-body);font-size:12px;}
.modal-actions .save{background:var(--accent-heat);border-color:var(--accent-heat);color:#12161a;font-weight:700;}
.status-msg{font-size:11px;margin-top:8px;color:var(--accent-ok);}
.status-msg.error{color:var(--accent-alarm);}

img{max-width:100%;height:auto;}

@media (max-width:640px){
  .topbar{padding:12px 16px;flex-wrap:wrap;gap:10px;}
  .wrap{padding:18px;}
}
@media (max-width:420px){
  .wrap{padding:12px;}
  .modal{padding:16px;}
  .top-status{width:100%;flex-wrap:wrap;gap:8px;}
  .top-status .status-pill,.top-status .unit-toggle,.top-status .logout-btn{flex:1 1 auto;}
  .unit-toggle button{flex:1 1 auto;padding:10px 22px;min-height:40px;}
  .device-grid{grid-template-columns:1fr;}
  .sensors{grid-template-columns:1fr;}
  .relays{grid-template-columns:1fr;}
}