:root{
  --bg:#ffffff; --fg:#111827; --muted:#6b7280;
  --green:#10b981; --yellow:#eab308; --red:#ef4444; --accent:#8B5CF6;
  --card:#ffffff; --line:#e5e7eb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:14px/1.45 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
.top{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--card);position:sticky;top:0;z-index:10}
.top h1{margin:0;font-size:18px;font-weight:700}
.controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
label{color:var(--muted)}
select,button{background:#f9fafb;color:var(--fg);border:1px solid var(--line);padding:8px 10px;border-radius:8px}
button{cursor:pointer}
.user-controls{display:flex;gap:8px;align-items:center;margin-left:16px}
.user-info{color:var(--muted);font-size:12px}
.btn{text-decoration:none;display:inline-block;padding:8px 12px;border-radius:8px;font-size:12px;transition:background-color 0.2s, box-shadow .2s ease, transform .2s ease;border:1px solid transparent}
.btn-primary{background:#8B5CF6;color:#fff;border-color:#8B5CF6}
.btn-primary:hover{background:#7c3aed;border-color:#7c3aed}
.btn-secondary{background:#f3f4f6;color:#111827;border:1px solid var(--line)}
.btn-secondary:hover{background:#e5e7eb}
main{padding:20px;position:relative;z-index:1}
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;padding:24px}
.auth-card{width:100%;max-width:440px;background:rgba(255,255,255,0.8);backdrop-filter:blur(10px);border:1px solid rgba(139,92,246,0.18);box-shadow:0 8px 32px rgba(139,92,246,0.08);border-radius:24px;padding:28px;position:relative;z-index:1}
.auth-title{font-size:32px;font-weight:800;margin:0 0 6px 0;color:#111827;text-align:center}
.auth-sub{font-size:14px;color:var(--muted);text-align:center;margin-bottom:18px}
.form{display:flex;flex-direction:column;gap:12px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-weight:600;color:#374151}
.form-group input{padding:12px;border:1px solid var(--line);border-radius:10px;font-size:14px;background:#fff}
.form-group input:focus{outline:none;border-color:rgba(139,92,246,0.5);box-shadow:0 0 0 3px rgba(139,92,246,0.15)}
.actions{display:flex;gap:10px;margin-top:6px}
.btn-primary{background:#8B5CF6;color:#fff;border:1px solid #8B5CF6}
.btn-primary:hover{background:#7c3aed;border-color:#7c3aed}
.title-hero{margin:20px 0 10px 0}
.title-main{font-size:56px;font-weight:800;line-height:1.05}
.title-sub{font-size:16px;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
@media (max-width: 900px){.cards{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:0 1px 2px rgba(0,0,0,0.04)}
.card h2{margin:0 0 10px 0;font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:0.08em}

/* Unified analytics card style */
.card.analytics{padding:32px;border-radius:24px;background:rgba(139,92,246,0.03);border:1px solid rgba(139,92,246,0.1);box-shadow:0 8px 32px rgba(139,92,246,0.08)}
.section{margin-bottom:20px}
.section-title{font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:.08em;margin:0 0 8px 0}
.divider{height:1px;background:var(--line);opacity:.6;margin:12px 0}
.kpi{grid-template-columns:repeat(4,1fr)}
.grid{display:grid;gap:8px}
.k{display:block;color:var(--muted);font-size:12px}
.v{display:block;font-size:18px;font-weight:600}
.status-text{margin-top:8px;color:var(--yellow)}
.chart{position:relative;width:100%;height:320px}
.chart > *{position:absolute;inset:0;width:100% !important;height:100% !important;background:#ffffff;border:1px solid var(--line);border-radius:10px}
/* Empty/old data placeholder */
.chart-empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#6b7280;font-size:12px;background:rgba(255,255,255,0.6);border:1px dashed #d1d5db;border-radius:10px}
/* Google Maps integration */
.map-container{position:relative;width:100%;height:320px;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:12px}
#battery-map{width:100%;height:100%}
.map-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);z-index:1}
.map-placeholder-content{text-align:center;color:var(--muted)}
.map-placeholder-icon{font-size:32px;margin-bottom:8px}
.map-placeholder-text{font-size:14px;font-weight:500;margin-bottom:4px}
.map-placeholder-note{font-size:12px;opacity:0.7}
.pos-controls{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* Polished abstract card accents (purple tones) */
.card{position:relative;overflow:hidden}
.card::before{content:"";position:absolute;width:260px;height:260px;right:-90px;top:-110px;background:radial-gradient(ellipse at center, rgba(139,92,246,0.18), rgba(139,92,246,0));filter:blur(14px);pointer-events:none}
.card::after{content:"";position:absolute;width:200px;height:200px;left:-100px;bottom:-110px;background:radial-gradient(ellipse at center, rgba(139,92,246,0.12), rgba(139,92,246,0));filter:blur(16px);pointer-events:none}

/* Hero section */
.hero{position:relative;border:1px solid var(--line);border-radius:20px;padding:28px;background:linear-gradient(180deg,#ffffff, #fafafa);overflow:hidden;margin-bottom:18px}
.hero::before{content:"";position:absolute;inset:-20% -10% auto auto;height:360px;width:360px;background:radial-gradient(circle at center, rgba(139,92,246,0.25), rgba(139,92,246,0));filter:blur(18px)}
.hero::after{content:"";position:absolute;bottom:-120px;left:-120px;height:320px;width:320px;background:radial-gradient(circle at center, rgba(139,92,246,0.18), rgba(139,92,246,0));filter:blur(18px)}
.hero-primary{display:flex;align-items:flex-end;gap:16px}
.hero-label{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:0.08em}
.hero-value{font-size:64px;font-weight:800;color:#111827}
.hero-secondary{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.chip{display:flex;gap:8px;align-items:center;background:#f3f4f6;border:1px solid var(--line);border-radius:999px;padding:8px 12px}
.chip-k{color:var(--muted);font-size:12px}
.chip-v{font-size:13px;font-weight:600}

.pos-links{margin-top:12px}
.pos-links-header{color:var(--muted);font-size:12px;margin-bottom:6px}
.pos-links-list{display:flex;flex-wrap:wrap;gap:8px}
.pos-link{font-size:12px;background:#f9fafb;border:1px solid var(--line);color:#6d28d9;padding:6px 10px;border-radius:999px;text-decoration:none}
.pos-link:hover{background:#f3f4f6;border-color:#d1d5db}

/* Floating abstract shapes layer */
.bg-shapes{position:fixed;inset:0;pointer-events:none;z-index:0}
.shape{position:absolute;display:block;filter:blur(2px);animation:float 14s ease-in-out infinite;will-change:transform,opacity}
.shape.circle{top:8%;left:6%;width:280px;height:280px;background:radial-gradient(circle, rgba(139,92,246,0.24), rgba(167,139,250,0.08));border-radius:50%}
.shape.ring{bottom:12%;right:8%;width:320px;height:320px;border-radius:50%;box-shadow:0 0 0 38px rgba(196,181,253,0.20) inset,0 0 0 2px rgba(196,181,253,0.35) inset;opacity:.75;animation-duration:18s}
.shape.blob{top:40%;left:50%;width:440px;height:300px;background:radial-gradient(ellipse at 30% 40%, rgba(221,214,254,0.38), rgba(221,214,254,0.10));transform:translate(-50%,-50%) rotate(8deg);filter:blur(14px);animation-duration:22s}
.shape.arc{top:70%;left:12%;width:240px;height:240px;border-radius:50%;box-shadow:0 0 0 2px rgba(167,139,250,0.5) inset;clip-path:polygon(0 0,100% 0,100% 50%,0 100%);opacity:.55;animation-duration:20s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* Page load cascade */
.reveal{opacity:0.001;transform:translateY(8px);transition:opacity .6s cubic-bezier(0.4,0,0.2,1),transform .6s cubic-bezier(0.4,0,0.2,1)}
.reveal.show{opacity:1;transform:translateY(0)}
.reveal-left{opacity:0;transform:translateX(-10px);transition:opacity .5s cubic-bezier(0.4,0,0.2,1),transform .5s cubic-bezier(0.4,0,0.2,1)}
.reveal-left.show{opacity:1;transform:translateX(0)}
.reveal-scale{opacity:0;transform:scale(.95);transition:opacity .7s cubic-bezier(0.4,0,0.2,1),transform .7s cubic-bezier(0.4,0,0.2,1)}
.reveal-scale.show{opacity:1;transform:scale(1)}

/* Hover micro-interactions */
.btn,button,select{transition:transform .2s ease, box-shadow .2s ease}
.btn:hover,button:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(139,92,246,0.12)}
.card{transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(139,92,246,0.08);border-color:rgba(139,92,246,0.25)}

/* Pulses and highlights */
@keyframes pulseGlow{0%,100%{box-shadow:0 0 0 0 rgba(139,92,246,0.2)}50%{box-shadow:0 0 0 10px rgba(139,92,246,0)}}
.highlight{animation:pulseGlow 1.2s ease-in-out 1}

/* Reduce motion accessibility */
@media (prefers-reduced-motion: reduce){
  .shape{animation:none}
  .reveal,.reveal-left,.reveal-scale{transition:none}
  .btn:hover,button:hover,.card:hover{transform:none;box-shadow:none}
}

/* Responsive layout for mobile */
@media (max-width: 760px){
  .top{flex-wrap:wrap;gap:8px}
  .top h1{font-size:16px}
  .controls{width:100%;justify-content:space-between}
  .user-controls{margin-left:0;margin-top:6px}
  main{padding:12px}
  .title-main{font-size:34px}
  .hero{padding:16px}
  .hero-value{font-size:40px}
  .chip{padding:6px 10px}
  .cards{grid-template-columns:1fr;gap:12px}
  .card{padding:12px;border-radius:14px}
  .card.analytics{padding:18px;border-radius:18px}
  .section{margin-bottom:14px}
  .chart{height:220px}
  .map-container{height:220px}
}

@media (max-width: 430px){
  .top{padding:10px 12px}
  .btn,button,select{padding:6px 8px;font-size:12px}
  .hero-label{font-size:12px}
  .hero-value{font-size:34px}
  .title-main{font-size:28px}
  .pos-links-list{gap:6px}
  .pos-link{font-size:11px}
  .chart{height:180px}
  .map-container{height:180px}
}

/* Admin dashboard styles */
.system-status{display:flex;gap:12px;margin-right:16px}
.status-indicator{font-size:12px;padding:4px 8px;border-radius:4px;background:#f3f4f6;color:#6b7280}
.status-indicator.online{background:#dcfce7;color:#166534}
.status-indicator.offline{background:#fee2e2;color:#dc2626}

.admin-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;text-align:center}
.stat-value{font-size:32px;font-weight:700;color:var(--fg);margin-bottom:4px}
.stat-label{font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:0.05em}

.batteries-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(400px,1fr));gap:20px}
.battery-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;position:relative;overflow:hidden}
.battery-card::before{content:"";position:absolute;width:120px;height:120px;right:-30px;top:-30px;background:radial-gradient(circle,rgba(139,92,246,0.15),rgba(139,92,246,0));filter:blur(8px);pointer-events:none}
.battery-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.battery-id{font-size:18px;font-weight:600;color:var(--fg)}
.battery-status{font-size:12px;padding:4px 8px;border-radius:12px;text-transform:uppercase;letter-spacing:0.05em}
.battery-status.online{background:#dcfce7;color:#166534}
.battery-status.offline{background:#fee2e2;color:#dc2626}
.battery-status.unknown{background:#f3f4f6;color:#6b7280}

.battery-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:16px}
.metric{text-align:center}
.metric-value{font-size:16px;font-weight:600;color:var(--fg)}
.metric-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:0.05em}

.battery-controls{display:flex;gap:8px;flex-wrap:wrap}
.control-btn{flex:1;min-width:80px;padding:8px 12px;font-size:12px;border-radius:8px;border:1px solid var(--line);background:#f9fafb;color:var(--fg);cursor:pointer;transition:all 0.2s}
.control-btn:hover{background:#f3f4f6}
.control-btn.active{background:#8B5CF6;color:#fff;border-color:#8B5CF6}
.control-btn:disabled{opacity:0.5;cursor:not-allowed}

.battery-actions{display:flex;gap:8px;margin-top:12px}
.action-btn{padding:6px 12px;font-size:11px;border-radius:6px;border:1px solid var(--line);background:#f9fafb;color:var(--fg);cursor:pointer;text-decoration:none;transition:all 0.2s}
.action-btn:hover{background:#f3f4f6}

/* Modal styles */
.modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,0.5)}
.modal-content{background:var(--card);margin:5% auto;padding:0;width:90%;max-width:500px;border-radius:12px;box-shadow:0 20px 25px -5px rgba(0,0,0,0.1)}
.modal-content.large{max-width:95%;max-height:90%;overflow:hidden}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid var(--line)}
.modal-header h3{margin:0;font-size:18px;font-weight:600}
.modal-close{font-size:24px;font-weight:bold;cursor:pointer;color:var(--muted)}
.modal-close:hover{color:var(--fg)}
.modal-body{padding:20px;max-height:70vh;overflow-y:auto}
.response-status{font-size:16px;font-weight:600;margin-bottom:12px}
.response-status.success{color:#166534}
.response-status.error{color:#dc2626}
.response-message{margin-bottom:8px;color:var(--fg)}
.response-command{margin-bottom:8px;color:var(--muted);font-family:monospace;font-size:12px}
.response-error{margin-bottom:8px;color:#dc2626;font-size:12px}
.response-time{color:var(--muted);font-size:12px}

/* History modal styles */
.history-tabs{display:flex;gap:8px;margin-bottom:20px;border-bottom:1px solid var(--line)}
.tab-btn{padding:8px 16px;border:none;background:none;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;transition:all 0.2s}
.tab-btn:hover{color:var(--fg)}
.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}
.history-content{position:relative}
.tab-content{display:none}
.tab-content.active{display:block}
.history-table-container{overflow-x:auto;max-height:50vh;border:1px solid var(--line);border-radius:8px}
.history-table{width:100%;border-collapse:collapse;font-size:12px}
.history-table th{background:#f9fafb;padding:8px;text-align:left;font-weight:600;color:var(--fg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:1}
.history-table td{padding:8px;border-bottom:1px solid #f3f4f6;color:var(--fg)}
.history-table tr:hover{background:#f9fafb}
.history-table tr:last-child td{border-bottom:none}

/* Responsive admin styles */
@media (max-width: 760px){
  .admin-stats{grid-template-columns:repeat(2,1fr);gap:12px}
  .batteries-grid{grid-template-columns:1fr;gap:16px}
  .battery-card{padding:16px}
  .battery-metrics{grid-template-columns:1fr;gap:8px}
  .system-status{flex-direction:column;gap:4px;margin-right:8px}
}