:root{
  --green:#16a34a; --green-d:#15803d; --bg:#f4f5f7; --card:#fff;
  --text:#1f2937; --muted:#6b7280; --line:#e5e7eb; --red:#dc2626;
  --amber:#d97706; --blue:#2563eb;
  --radius:14px; --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg); color:var(--text); -webkit-tap-highlight-color:transparent;
}

/* ---------- Auth ---------- */
.auth-bg{display:flex;min-height:100vh;align-items:center;justify-content:center;
  background:linear-gradient(160deg,#16a34a,#15803d);padding:20px}
.auth-card{background:var(--card);width:100%;max-width:380px;padding:28px 24px;
  border-radius:var(--radius);box-shadow:var(--shadow)}
.auth-card h1{margin:0 0 4px;font-size:1.5rem}
.auth-card .muted{margin:0 0 18px}

/* ---------- Topbar / layout ---------- */
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;
  justify-content:space-between;background:var(--green);color:#fff;
  padding:14px 16px;font-weight:600}
.topbar .brand{color:#fff;text-decoration:none;font-size:1.1rem}
.topbar .who{font-size:.85rem;opacity:.9;font-weight:400}
.container{max-width:680px;margin:0 auto;padding:16px 16px 90px}

/* ---------- Forms ---------- */
label{display:block;margin:0 0 14px;font-size:.9rem;color:var(--muted)}
input,select{display:block;width:100%;margin-top:6px;padding:12px;
  border:1px solid var(--line);border-radius:10px;font-size:1rem;background:#fff;color:var(--text)}
input:focus,select:focus{outline:none;border-color:var(--green)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:13px;border:none;border-radius:10px;background:var(--green);
  color:#fff;font-size:1rem;font-weight:600;cursor:pointer;text-decoration:none;text-align:center}
.btn:active{background:var(--green-d)}
.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn.danger{background:var(--red)}
.btn.small{width:auto;padding:8px 14px;font-size:.85rem}
.btn-row{display:flex;gap:10px}

/* ---------- Alerts ---------- */
.alert{padding:12px 14px;border-radius:10px;background:#ecfdf5;color:#065f46;
  border:1px solid #a7f3d0;margin:0 0 16px;font-size:.92rem}
.alert.error{background:#fef2f2;color:#991b1b;border-color:#fecaca}
.muted{color:var(--muted)}

/* ---------- Inventory list ---------- */
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px}
.toolbar input{margin-top:0}
.section-title{display:flex;align-items:center;justify-content:space-between;
  margin:18px 0 8px;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.item{display:flex;align-items:center;gap:12px;background:var(--card);
  padding:12px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:10px}
.item img,.item .noimg{width:52px;height:52px;border-radius:10px;object-fit:cover;
  background:#f3f4f6;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.item .info{flex:1;min-width:0}
.item .name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .brand{font-size:.8rem;color:var(--muted)}
.badges{display:flex;gap:6px;margin-top:4px;flex-wrap:wrap}
.badge{font-size:.72rem;padding:2px 8px;border-radius:999px;background:#f3f4f6;color:var(--muted)}
.badge.qty{background:#dcfce7;color:#166534;font-weight:600}
.badge.open{background:#fef3c7;color:#92400e}
.badge.low{background:#fee2e2;color:#991b1b}
.item .qbtns{display:flex;align-items:center;gap:6px}
.qbtn{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);
  background:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center}
.qbtn:active{background:#f3f4f6}
.count{min-width:24px;text-align:center;font-weight:700;font-size:1.05rem}
.empty{text-align:center;color:var(--muted);padding:50px 20px}
.empty .big{font-size:3rem;display:block;margin-bottom:10px}

/* ---------- Scanner ---------- */
.mode-switch{display:flex;background:#fff;border-radius:12px;padding:4px;
  box-shadow:var(--shadow);margin-bottom:14px}
.mode-switch button{flex:1;padding:11px;border:none;background:transparent;border-radius:9px;
  font-weight:600;color:var(--muted);cursor:pointer;font-size:.92rem}
.mode-switch button.on{color:#fff}
.mode-switch button.on[data-mode="add"]{background:var(--green)}
.mode-switch button.on[data-mode="open"]{background:var(--amber)}
.mode-switch button.on[data-mode="consume"]{background:var(--red)}
#reader{width:100%;border-radius:var(--radius);overflow:hidden;background:#000;min-height:240px}
#video{width:100%;display:block}
.scan-hint{text-align:center;color:var(--muted);font-size:.9rem;margin:12px 0}
.scan-result{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:16px;margin-top:14px}
.scan-result.hidden{display:none}
.scan-result h3{margin:0 0 6px}
.scan-result .code{font-family:monospace;color:var(--muted);font-size:.85rem}

/* ---------- Tabbar ---------- */
.tabbar{position:fixed;bottom:0;left:0;right:0;display:flex;background:#fff;
  border-top:1px solid var(--line);z-index:20}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:8px 0 10px;text-decoration:none;color:var(--muted);font-size:.7rem}
.tabbar a.on{color:var(--green)}
.tabbar .ico{font-size:1.3rem}
.tabbar .scan-tab .ico{font-size:1.4rem}

/* ---------- Users table ---------- */
.user-row{display:flex;align-items:center;gap:12px;background:var(--card);
  padding:12px 14px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:10px}
.user-row .info{flex:1;min-width:0}
.user-row .email{font-size:.82rem;color:var(--muted)}
.role-tag{font-size:.72rem;padding:2px 8px;border-radius:999px;background:#e0e7ff;color:#3730a3}
.role-tag.admin{background:#fef3c7;color:#92400e}

/* ---------- Toast ---------- */
#toast{position:fixed;left:50%;bottom:80px;transform:translateX(-50%) translateY(20px);
  background:#111827;color:#fff;padding:12px 18px;border-radius:999px;font-size:.9rem;
  opacity:0;transition:.25s;pointer-events:none;z-index:50;max-width:90%}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
#toast.ok{background:var(--green)}
#toast.err{background:var(--red)}