*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
:root{
  --bg:#0d0d0d;--surface:#1a1a1a;--surface2:#222;--surface3:#2a2a2a;
  --border:rgba(255,255,255,0.07);--border-md:rgba(255,255,255,0.13);
  --text:#f0f0f0;--muted:#888;--hint:#444;
  --accent:#5b9cf6;--accent2:#1ab5c4;
  --grad:linear-gradient(135deg,#5b4fd4 0%,#1ab5c4 100%);
  --ok:#3d9e35;--ok-bg:rgba(61,158,53,.15);--ok-text:#7dd475;
  --err:#c44;--err-bg:rgba(204,68,68,.15);--err-text:#f09595;
  --danger:#c44;
  --r:12px;--rl:18px;
  --nav-h:64px;
}
@media(prefers-color-scheme:light){
  :root{
    --bg:#f0f2f5;--surface:#ffffff;--surface2:#f7f8fa;--surface3:#edf0f4;
    --border:rgba(0,0,0,0.08);--border-md:rgba(0,0,0,0.14);
    --text:#1a1a1a;--muted:#666;--hint:#bbb;
  }
}
html[data-theme="dark"]{
  --bg:#0d0d0d;--surface:#1a1a1a;--surface2:#222;--surface3:#2a2a2a;
  --border:rgba(255,255,255,0.07);--border-md:rgba(255,255,255,0.13);
  --text:#f0f0f0;--muted:#888;--hint:#444;
}
html[data-theme="light"]{
  --bg:#f0f2f5;--surface:#ffffff;--surface2:#f7f8fa;--surface3:#edf0f4;
  --border:rgba(0,0,0,0.08);--border-md:rgba(0,0,0,0.14);
  --text:#1a1a1a;--muted:#666;--hint:#bbb;
}
.theme-toggle{
  background:var(--surface2);border:1.5px solid var(--border-md);
  color:var(--text);border-radius:8px;padding:6px 10px;cursor:pointer;
  font-size:17px;line-height:1;transition:background .2s;flex-shrink:0;
}
.theme-toggle:hover{background:var(--surface3)}
html{height:100%}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);font-size:15px;-webkit-font-smoothing:antialiased;min-height:100%}
.login-screen{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px;
  background:radial-gradient(ellipse at 50% -10%,rgba(91,79,212,0.2) 0%,var(--bg) 60%);
}
.login-card{width:100%;max-width:400px}
.login-logo-wrap{text-align:center;margin-bottom:32px}
.login-title{font-size:28px;font-weight:800;margin-top:16px;letter-spacing:-0.5px}
.login-sub{font-size:14px;color:var(--muted);margin-top:6px}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:8px}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:15px 18px;background:var(--surface);
  border:1.5px solid var(--border-md);border-radius:var(--r);
  color:var(--text);font-size:16px;font-family:inherit;outline:none;
  transition:border-color .2s,box-shadow .2s;
}
.form-group select{padding:14px 18px}
.form-group textarea{resize:vertical;min-height:80px}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--accent2);box-shadow:0 0 0 3px rgba(26,181,196,0.15)}
.form-group input::placeholder{color:var(--hint)}
.btn-login{
  width:100%;padding:16px;margin-top:8px;
  background:var(--grad);border:none;border-radius:var(--r);
  color:#fff;font-size:16px;font-weight:700;font-family:inherit;
  cursor:pointer;transition:opacity .2s,transform .15s;
  box-shadow:0 4px 20px rgba(91,79,212,0.3);
}
.btn-login:hover{opacity:0.9;transform:translateY(-1px)}
.btn-login:active{transform:scale(0.98)}
.btn-login:disabled{opacity:0.5;cursor:not-allowed;transform:none}
.login-error{
  background:var(--err-bg);border:1px solid rgba(204,68,68,0.3);
  color:var(--err-text);font-size:13px;padding:12px 16px;
  border-radius:var(--r);margin-bottom:14px;display:none;text-align:center;
}
.login-error.show{display:block}
.topbar-brand{font-size:18px;font-weight:800;letter-spacing:-0.5px;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;flex-shrink:0}
.topbar{
  flex-shrink:0;background:var(--surface);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 12px;height:56px;gap:8px;
  position:sticky;top:0;z-index:50;
}
.topbar-spacer{flex:1}
.desktop-nav{display:none;gap:4px}
.desktop-nav-item{
  padding:8px 14px;border-radius:8px;font-size:13px;font-weight:600;
  color:var(--muted);cursor:pointer;border:none;background:none;
  font-family:inherit;transition:all .15s;
}
.desktop-nav-item:hover{color:var(--text);background:var(--surface2)}
.desktop-nav-item.active{color:var(--accent2);background:rgba(26,181,196,0.1)}
.user-pill{
  display:flex;align-items:center;gap:6px;
  background:var(--surface2);border:1px solid var(--border-md);
  padding:5px 10px;border-radius:99px;flex-shrink:1;min-width:0;
}
.user-name{font-size:12px;font-weight:500;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn-signout{
  padding:7px 14px;background:transparent;border:1px solid var(--border-md);
  border-radius:8px;color:var(--muted);font-size:12px;font-weight:600;
  cursor:pointer;font-family:inherit;transition:all .15s;flex-shrink:0;display:none;
}
.btn-signout:hover{color:var(--err-text);border-color:rgba(204,68,68,0.4)}
.content{
  flex:1;padding:20px 16px;
  padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom,0px) + 16px);
}
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;
  height:calc(var(--nav-h) + env(safe-area-inset-bottom,0px));
  padding-bottom:env(safe-area-inset-bottom,0px);
  background:var(--surface);border-top:1px solid var(--border);
  display:flex;align-items:stretch;z-index:50;
  overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.nav-item{
  flex:0 0 auto;min-width:52px;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:3px;cursor:pointer;padding:0 6px;
  border:none;background:none;color:var(--muted);font-family:inherit;
  transition:color .15s;
  border-right:1px solid var(--border);
}
.nav-item:last-child{border-right:none}
.nav-item:active{opacity:0.6}
.nav-item.active{color:var(--accent2)}
.nav-icon{font-size:20px;line-height:1}
.nav-label{font-size:9px;font-weight:600;text-transform:uppercase;letter-spacing:0.05em}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);padding:20px;margin-bottom:16px}
.card-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:0.1em;color:var(--muted);margin-bottom:16px}
.info-list{display:flex;flex-direction:column}
.info-row{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--border)}
.info-row:last-child{border-bottom:none;padding-bottom:0}
.info-row:first-child{padding-top:0}
.info-key{font-size:13px;color:var(--muted);font-weight:500}
.info-val{font-size:13px;color:var(--text);font-weight:600;text-align:right;max-width:65%;word-break:break-all}
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:99px;font-size:11px;font-weight:600}
.badge.online{background:var(--ok-bg);color:var(--ok-text)}
.badge.offline{background:var(--err-bg);color:var(--err-text)}
.badge.pending{background:rgba(255,165,0,0.15);color:#f0a050}
.badge-dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.no-data{text-align:center;color:var(--muted);padding:48px 0;font-size:14px}
.loading{text-align:center;color:var(--muted);padding:32px 0;font-size:14px}
@media(min-width:768px){
  .desktop-nav{display:flex}
  .btn-signout{display:block}
  .bottom-nav{display:none}
  .topbar{padding:0 24px;gap:16px;height:60px}
  .content{
    padding:28px 32px;padding-bottom:28px;
    max-width:1200px;margin:0 auto;
  }
}

/* ── Admin-specific styles ──────────────────────────────── */
.stats-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:20px}
@media(min-width:600px){.stats-row{grid-template-columns:repeat(4,1fr)}}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);padding:18px}
.stat-label{font-size:10px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:6px}
.stat-value{font-size:26px;font-weight:800;letter-spacing:-1px}
.stat-value.accent{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-value.danger{color:var(--err-text)}
.stat-unit{font-size:11px;color:var(--muted);margin-top:3px}

.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}
.page-title{font-size:20px;font-weight:800;letter-spacing:-0.5px}

.filter-row{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.filter-row input,.filter-row select{
  padding:9px 14px;background:var(--surface);border:1.5px solid var(--border-md);
  border-radius:var(--r);color:var(--text);font-size:14px;font-family:inherit;
  outline:none;flex:1;min-width:140px;
}
.filter-row input:focus,.filter-row select:focus{border-color:var(--accent2)}

.btn-sm{padding:7px 14px;font-size:13px;font-weight:600;border-radius:9px;border:none;cursor:pointer;font-family:inherit;transition:all .15s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 2px 12px rgba(91,79,212,0.25)}
.btn-primary:hover{opacity:0.9}
.btn-secondary{background:var(--surface2);color:var(--text);border:1px solid var(--border-md)}
.btn-secondary:hover{background:var(--surface3)}
.btn-danger{background:rgba(204,68,68,0.1);color:var(--err-text);border:1px solid rgba(204,68,68,0.25)}
.btn-danger:hover{background:rgba(204,68,68,0.2)}
.btn-warn{background:rgba(255,165,0,0.1);color:#f0a050;border:1px solid rgba(255,165,0,0.25)}
.btn-warn:hover{background:rgba(255,165,0,0.2)}

.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);overflow:hidden;overflow-x:auto;margin-bottom:16px}
.admin-table{width:100%;border-collapse:collapse;min-width:500px}
.admin-table th{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:0.08em;color:var(--muted);padding:11px 14px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap;background:var(--surface2)}
.admin-table td{padding:11px 14px;border-bottom:1px solid var(--border);font-size:13px;vertical-align:middle}
.admin-table tr:last-child td{border-bottom:none}
.admin-table tbody tr:hover td{background:rgba(255,255,255,0.02)}
.action-btns{display:flex;gap:6px;flex-wrap:nowrap}

.modal-overlay{display:none;position:fixed;inset:0;z-index:9998;background:rgba(0,0,0,0.75);backdrop-filter:blur(4px);padding:20px;align-items:flex-start;justify-content:center;overflow-y:auto}
.modal-overlay.open{display:flex}
.modal-box{width:100%;max-width:480px;background:var(--surface);border-radius:var(--rl);border:1px solid var(--border-md);overflow:hidden;margin:auto}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--border)}
.modal-title{font-size:16px;font-weight:700}
.modal-close{background:none;border:none;color:var(--muted);font-size:24px;cursor:pointer;line-height:1;padding:0 4px}
.modal-body{padding:22px}
.modal-footer{padding:14px 22px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}
.modal-err{display:none;background:var(--err-bg);border:1px solid rgba(204,68,68,0.3);color:var(--err-text);font-size:13px;padding:10px 14px;border-radius:8px;margin-bottom:14px}
.modal-err.show{display:block}