:root{
  --bg:#222831;
  --surface:#393E46;
  --ink:#EEEEEE;
  --ink-muted:#B7BEC4;
  --accent:#00ADB5;
  --accent-tint:#EEEEEE;
  --line:#4A5058;
  --line-strong:#00ADB5;
  --radius:14px;
  --danger:#FF6B57;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:'Inter',sans-serif;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:4px;}
.display{font-family:'Plus Jakarta Sans',sans-serif;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#fff;
  padding:11px 20px;border-radius:999px;
  font-size:14.5px;font-weight:600;border:none;cursor:pointer;
  transition:background .15s ease,transform .15s ease;
  font-family:'Inter',sans-serif;
}
.btn:hover{background:#00888E;}
.btn:active{transform:scale(0.97);}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-sm{padding:8px 14px;font-size:13.5px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;cursor:not-allowed;}

/* ---------- Login screen ---------- */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px;
}
.auth-card{
  width:100%;max-width:380px;
  background:var(--surface);border:1px solid var(--line);border-radius:20px;
  padding:40px 32px;
}
.auth-logo{display:flex;justify-content:center;margin-bottom:24px;}
.auth-logo img{height:40px;filter:brightness(0) invert(1);}
.auth-card h1{
  font-family:'Plus Jakarta Sans',sans-serif;font-size:22px;font-weight:700;
  margin:0 0 6px;text-align:center;
}
.auth-card .sub{color:var(--ink-muted);font-size:14px;text-align:center;margin:0 0 28px;}
.field{display:flex;flex-direction:column;gap:8px;font-size:14px;font-weight:600;margin-bottom:16px;}
.field input{
  font-family:'Inter',sans-serif;font-size:15px;font-weight:400;
  background:var(--bg);border:1.5px solid var(--line);border-radius:10px;
  padding:12px 14px;color:var(--ink);
}
.field input:focus{border-color:var(--accent);outline:none;}
.field input::placeholder{color:#767C84;}
.auth-error{
  background:rgba(255,107,87,0.1);border:1px solid var(--danger);color:var(--danger);
  border-radius:10px;padding:10px 14px;font-size:13.5px;margin-bottom:16px;
}

/* ---------- App shell ---------- */
.app{display:flex;min-height:100vh;}
.sidebar{
  width:240px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.sidebar-head{padding:22px 22px 18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);}
.sidebar-head img{height:28px;filter:brightness(0) invert(1);}
.sidebar-head span{font-family:'Plus Jakarta Sans',sans-serif;font-weight:700;font-size:15px;}
.sidebar-nav{flex:1;padding:16px 12px;display:flex;flex-direction:column;gap:4px;}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;
  color:var(--ink-muted);font-size:14.5px;font-weight:600;transition:background .15s ease,color .15s ease;
}
.nav-item .ic{width:18px;height:18px;flex-shrink:0;}
.nav-item .ic svg{width:100%;height:100%;stroke:currentColor;}
.nav-item:hover{background:var(--bg);color:var(--ink);}
.nav-item.active{background:rgba(0,173,181,0.12);color:var(--accent);}
.sidebar-foot{padding:16px 22px;border-top:1px solid var(--line);}
.user-chip{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.user-avatar{
  width:32px;height:32px;border-radius:50%;background:var(--accent-tint);color:var(--bg);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;
}
.user-name{font-size:13.5px;font-weight:600;line-height:1.2;}
.user-role{font-size:12px;color:var(--ink-muted);}
.logout-link{font-size:13px;color:var(--ink-muted);display:inline-flex;align-items:center;gap:6px;}
.logout-link:hover{color:var(--danger);}

.main{flex:1;min-width:0;}
.topbar{
  position:sticky;top:0;z-index:10;
  background:rgba(34,40,49,0.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  padding:18px 32px;display:flex;align-items:center;justify-content:space-between;
}
.topbar h1{font-family:'Plus Jakarta Sans',sans-serif;font-size:19px;font-weight:700;margin:0;}
.content{padding:32px;max-width:1200px;}

@media (max-width:860px){
  .sidebar{position:fixed;left:-260px;z-index:60;transition:left .2s ease;box-shadow:0 0 0 100vmax rgba(0,0,0,0);}
  .sidebar.open{left:0;box-shadow:0 0 40px rgba(0,0,0,0.4);}
  .app{flex-direction:column;}
  .content{padding:20px;}
  .menu-btn{display:inline-flex;}
}
.menu-btn{
  display:none;background:transparent;border:1px solid var(--line);color:var(--ink);
  width:38px;height:38px;border-radius:10px;align-items:center;justify-content:center;cursor:pointer;
}

/* ---------- Dashboard tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;}
.tile{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:14px;cursor:pointer;
  transition:border-color .15s ease,transform .15s ease;
}
.tile:hover{border-color:var(--accent);transform:translateY(-2px);}
.tile .icon{
  width:40px;height:40px;border-radius:10px;background:var(--accent-tint);
  display:flex;align-items:center;justify-content:center;
}
.tile .icon svg{width:20px;height:20px;stroke:var(--accent);}
.tile h3{font-size:16px;font-weight:700;margin:0;}
.tile p{font-size:13.5px;color:var(--ink-muted);margin:0;}

/* ---------- Cards / sections ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;
  padding:5px 12px;border-radius:999px;
}
.badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor;}
.badge.ok{background:rgba(0,173,181,0.12);color:var(--accent);}
.badge.off{background:rgba(255,107,87,0.12);color:var(--danger);}
.badge.pending{background:var(--bg);color:var(--ink-muted);}

.empty-state{
  text-align:center;color:var(--ink-muted);font-size:14px;padding:48px 24px;
  border:1.5px dashed var(--line);border-radius:var(--radius);
}

/* ---------- Camera screen ---------- */
.camera-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap;}
.camera-frame{
  border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#000;
  position:relative;
}
video-stream{display:block;width:100%;max-height:72vh;background:#000;}

/* ---------- Modal ---------- */
.modal-overlay{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,0.55);
  align-items:center;justify-content:center;padding:20px;z-index:100;
}
.modal-overlay.open{display:flex;}
.modal{
  width:100%;max-width:420px;background:var(--surface);border:1px solid var(--line);
  border-radius:18px;padding:0;overflow:hidden;
}
.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;border-bottom:1px solid var(--line);
}
.modal-title{font-family:'Plus Jakarta Sans',sans-serif;font-weight:700;font-size:16px;}
.modal-body{padding:22px;display:flex;flex-direction:column;gap:16px;}
.modal-footer{padding:16px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px;}
.field-row{display:flex;gap:12px;}
.field-row .field{flex:1;margin-bottom:0;}
.field-hint{font-size:12px;color:var(--ink-muted);font-weight:400;margin-top:2px;}