:root{--sidebar:#111827;--sidebar-muted:#9ca3af;--brand:#2563eb;--bg:#f3f4f6;--card:#ffffff;}
body{background:var(--bg);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#111827;}
.app-shell{display:flex;min-height:100vh;}
.sidebar{width:270px;background:var(--sidebar);color:#fff;position:fixed;top:0;bottom:0;left:0;padding:20px 16px;overflow-y:auto;}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:24px;}
.brand-logo{width:44px;height:44px;border-radius:14px;background:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;letter-spacing:.5px;}
.brand-title{font-weight:700;font-size:17px;}
.brand-subtitle{font-size:12px;color:var(--sidebar-muted);}
.sidebar .nav-link{color:#d1d5db;border-radius:12px;padding:10px 12px;font-weight:500;}
.sidebar .nav-link:hover,.sidebar .nav-link.active{background:#1f2937;color:#fff;}
.nav-section{color:#6b7280;text-transform:uppercase;font-size:11px;font-weight:700;padding:20px 12px 6px;letter-spacing:.08em;}
.main{margin-left:270px;flex:1;padding:24px;}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;}
.page-title{font-size:24px;font-weight:800;}
.card{border:0;border-radius:18px;box-shadow:0 6px 18px rgba(15,23,42,.06);}
.card-header{border-top-left-radius:18px!important;border-top-right-radius:18px!important;padding:16px 20px;}
.metric-card .card-body{padding:22px;}
.metric-number{font-size:38px;font-weight:800;line-height:1.1;}
.form-control,.form-select,.btn{border-radius:12px;}
.btn-primary{background:#2563eb;border-color:#2563eb;}
.table th{font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:.04em;}
.qr-box{border:2px dashed #cbd5e1;border-radius:18px;padding:10px;min-height:260px;background:#f8fafc;overflow:hidden;}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eff6ff,#f8fafc);}
.login-card{width:420px;max-width:calc(100vw - 32px);background:#fff;border-radius:24px;padding:32px;box-shadow:0 20px 60px rgba(15,23,42,.12);}
.guest-found{border:1px solid #bfdbfe;background:#eff6ff;border-radius:14px;padding:12px;}
@media(max-width:900px){.sidebar{position:static;width:100%;height:auto}.app-shell{display:block}.main{margin-left:0;padding:16px}.topbar{display:block}.topbar .d-flex{margin-top:12px}.qr-box{min-height:220px}}

.qr-box-strong{
    min-height:420px;
    background:#020617;
    border-color:#2563eb;
}
.qr-box-strong video{
    border-radius:14px;
}
#qr-status{
    padding:8px 10px;
    border-radius:10px;
    background:#f8fafc;
}
@media(max-width:900px){
    .qr-box-strong{min-height:360px}
}

.qr-native-wrap{
    position:relative;
    width:100%;
    min-height:440px;
    background:#020617;
    border-radius:18px;
    overflow:hidden;
    border:2px solid #2563eb;
}

.qr-native-video{
    width:100%;
    height:440px;
    object-fit:cover;
    display:block;
    background:#020617;
}

.qr-native-frame{
    position:absolute;
    left:50%;
    top:50%;
    width:min(72vw, 340px);
    height:min(72vw, 340px);
    transform:translate(-50%, -50%);
    border:4px solid rgba(34,197,94,.95);
    border-radius:22px;
    box-shadow:0 0 0 999px rgba(0,0,0,.18);
    pointer-events:none;
}

#qr-native-status{
    padding:8px 10px;
    background:#f8fafc;
    border-radius:10px;
}

@media(max-width:768px){
    .qr-native-wrap{min-height:360px}
    .qr-native-video{height:360px}
    .qr-native-frame{
        width:76vw;
        height:76vw;
    }
}