:root{
  --primary:#4F46E5; --primary-dark:#4338CA; --primary-light:#EEF2FF;
  --n900:#0F172A; --n700:#334155; --n500:#64748B; --n200:#E2E8F0; --n50:#F8FAFC;
  --success:#16A34A; --warning:#F59E0B; --danger:#DC2626; --info:#0EA5E9;
}
*{box-sizing:border-box;}
body{margin:0;font-family:'Inter',sans-serif;background:var(--n50);color:var(--n900);}
input,select,textarea,button{font-family:inherit;}

/* login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#EEF2FF,#F8FAFC);}
.login-card{width:360px;background:#fff;border:1px solid var(--n200);border-radius:20px;padding:32px;box-shadow:0 20px 40px rgba(15,23,42,0.08);display:flex;flex-direction:column;gap:4px;}
.login-logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:22px;margin-bottom:2px;}
.login-sub{color:var(--n500);font-size:13px;margin:0 0 16px;}
.logo-badge{width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;}
.logo-badge.small{width:28px;height:28px;border-radius:8px;font-size:14px;}
.field-label{font-size:12px;font-weight:600;color:var(--n700);margin:10px 0 4px;}
input[type=email],input[type=password],input[type=text],input[type=number],input[type=date],select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--n200);border-radius:10px;font-size:14px;background:var(--n50);outline:none;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);background:#fff;}
.btn-primary{background:var(--primary);color:#fff;border:none;border-radius:10px;padding:11px 18px;font-weight:700;font-size:14px;cursor:pointer;box-shadow:0 1px 2px rgba(79,70,229,0.3);transition:background .15s ease,transform .05s ease;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-primary:active{transform:translateY(1px);}
.btn-primary.full{width:100%;margin-top:16px;}
.btn-ghost{background:transparent;border:1px solid var(--n200);border-radius:10px;padding:7px 14px;font-size:13px;font-weight:600;color:var(--n700);cursor:pointer;}
.error-text{color:var(--danger);font-size:13px;min-height:16px;margin:8px 0 0;}
.demo-creds{margin-top:18px;padding-top:14px;border-top:1px dashed var(--n200);font-size:11px;color:var(--n500);line-height:1.7;}
.demo-creds strong{display:block;color:var(--n700);font-size:12px;margin-bottom:2px;}
.switch-line{text-align:center;font-size:13px;color:var(--n500);margin:14px 0 0;}
.switch-line a{color:var(--primary);font-weight:700;text-decoration:none;}
.switch-line a:hover{text-decoration:underline;}
.google-btn-slot{display:flex;justify-content:center;min-height:2px;margin-bottom:2px;}
.or-divider{display:flex;align-items:center;gap:10px;color:var(--n500);font-size:12px;margin:14px 0;}
.or-divider::before,.or-divider::after{content:"";flex:1;height:1px;background:var(--n200);}

/* app shell */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 24px;background:#fff;border-bottom:1px solid var(--n200);position:sticky;top:0;z-index:5;}
.topbar-left{display:flex;align-items:center;gap:10px;}
.brand{font-weight:800;font-size:17px;}
.topbar-right{display:flex;align-items:center;gap:12px;}
.user-name{font-size:13px;color:var(--n700);font-weight:600;}
.switcher-btn{display:flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--n200);border-radius:10px;background:var(--n50);font-size:13px;font-weight:600;cursor:pointer;}
.switcher-menu{position:absolute;margin-top:6px;background:#fff;border:1px solid var(--n200);border-radius:12px;box-shadow:0 10px 30px rgba(15,23,42,0.12);min-width:240px;overflow:hidden;z-index:20;}
.switcher-item{display:flex;justify-content:space-between;padding:10px 14px;font-size:13px;cursor:pointer;}
.switcher-item:hover{background:var(--primary-light);}
.switcher-item.active{background:var(--primary-light);color:var(--primary-dark);font-weight:700;}
.plain-restaurant{font-size:13px;font-weight:600;color:var(--n700);padding:7px 4px;}

.tabbar{display:flex;gap:4px;padding:8px 24px;background:#fff;border-bottom:1px solid var(--n200);}
.tab{border:none;background:transparent;padding:8px 14px;border-radius:8px;font-size:13px;font-weight:600;color:var(--n500);cursor:pointer;}
.tab.active{background:var(--primary-light);color:var(--primary);}
.main{padding:24px;max-width:1100px;margin:0 auto;}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

.card{background:#fff;border:1px solid var(--n200);border-radius:16px;padding:20px;margin-bottom:16px;transition:box-shadow .15s ease;}
.card:hover{box-shadow:0 4px 16px rgba(15,23,42,0.05);}
.card h2{margin:0 0 14px;font-size:18px;}
.card h3{margin:0 0 12px;font-size:14px;}

.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px;}
.kpi{background:#fff;border:1px solid var(--n200);border-radius:16px;padding:16px;transition:box-shadow .15s ease;}
.kpi:hover{box-shadow:0 4px 16px rgba(15,23,42,0.05);}
.kpi .label{font-size:11px;font-weight:700;color:var(--n500);text-transform:uppercase;letter-spacing:.02em;}
.kpi .value{font-size:24px;font-weight:800;margin-top:4px;}
.kpi.profit{background:linear-gradient(180deg,#F0FDF4,#ffffff);border-color:#DCFCE7;}
.kpi.profit .value{color:var(--success);}
.kpi.warn .value{color:var(--warning);}

.panels-grid{display:grid;grid-template-columns:2fr 1fr;gap:16px;}
.cat-list{display:flex;flex-direction:column;gap:8px;}
.cat-row{display:flex;justify-content:space-between;font-size:13px;padding:6px 0;border-bottom:1px solid var(--n50);}

.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:10px;}
.field label{display:block;font-size:11px;font-weight:700;color:var(--n500);margin-bottom:4px;text-transform:uppercase;}
.save-bar{display:flex;align-items:center;justify-content:space-between;margin-top:14px;padding-top:14px;border-top:1px solid var(--n200);}
.save-bar strong{color:var(--primary);font-size:18px;}
.save-msg{font-size:13px;color:var(--success);min-height:16px;margin:8px 0 0;}
.history-list{display:flex;flex-direction:column;gap:6px;}
.history-row{display:flex;justify-content:space-between;font-size:13px;padding:8px 10px;border-radius:8px;background:var(--n50);}

@media (max-width: 860px){
  .kpi-grid{grid-template-columns:repeat(2,1fr);}
  .panels-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:repeat(2,1fr);}
}