:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f2430;
  --border: #2a3140;
  --text: #e6e9ef;
  --muted: #93a0b3;
  --accent: #4f8cff;
  --accent-2: #2e6bd0;
  --ok: #38c172;
  --warn: #f0a93b;
  --bad: #e5534b;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: var(--muted); }

.container { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* Top nav */
.nav {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.nav .container { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 16px; min-height: 58px; padding-top: 8px; padding-bottom: 8px; }
.nav .brand { font-weight: 700; font-size: 1.05rem; color: var(--text); }
.nav .brand .dot { color: var(--accent); }
.nav .spacer { flex: 1; }
.nav a { color: var(--muted); font-size: 0.92rem; }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav .who { color: var(--muted); font-size: 0.88rem; }
.nav .who strong { color: var(--text); }

/* Cards / panels */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 1.05rem; }
.card h3 { margin: 0 0 8px; font-size: 0.95rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }

.page-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin: 22px 0 16px; }
.page-head h1 { margin: 0; font-size: 1.3rem; }
.page-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Stat grid */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 8px 0 6px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .n { font-size: 1.9rem; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
th { color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; font-size: 0.78rem; }
tr:hover { background: var(--panel-2); }
.uid { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.05em; }

/* Buttons */
.btn {
  display: inline-block; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 0.9rem; cursor: pointer;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); }
.btn.danger { color: var(--bad); border-color: #4a2a27; }
.btn.danger:hover { background: #3a1f1d; }
.btn.sm { padding: 5px 10px; font-size: 0.82rem; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* Forms */
form .field { margin-bottom: 14px; }
label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 0.85rem; }
input[type=text], input[type=password], input[type=search], textarea, select {
  width: 100%; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 0.95rem; font-family: inherit;
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }
.hint { color: var(--muted); font-size: 0.8rem; margin-top: 4px; }
.uid-row { display: flex; gap: 8px; align-items: stretch; }
.uid-row input { flex: 1; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.74rem; font-weight: 600; }
.badge.ok { background: #10351f; color: var(--ok); }
.badge.warn { background: #3a2c12; color: var(--warn); }
.badge.bad { background: #3a1d1b; color: var(--bad); }
.badge.neutral { background: var(--panel-2); color: var(--muted); }

/* Flash */
.flash { padding: 10px 14px; border-radius: 8px; margin: 14px 0; font-size: 0.9rem; }
.flash.success { background: #10351f; color: var(--ok); border: 1px solid #1c4a2e; }
.flash.error { background: #3a1d1b; color: var(--bad); border: 1px solid #5a2a26; }
.flash.info { background: #11243a; color: var(--accent); border: 1px solid #1c3a5a; }

/* Auth pages (centered) */
.auth { min-height: 80vh; display: flex; align-items: center; justify-content: center; }
.auth-box { width: 100%; max-width: 380px; }
.auth-box .logo { font-size: 1.5rem; font-weight: 800; text-align: center; margin-bottom: 6px; }
.auth-box .logo .dot { color: var(--accent); }
.auth-box .sub { text-align: center; color: var(--muted); margin-bottom: 18px; font-size: 0.9rem; }

/* Tap page hero */
.tap-hero { text-align: center; padding: 24px 0; }
.tap-hero .big { font-size: 2.2rem; font-weight: 800; }
.uid-big { font-family: ui-monospace, monospace; font-size: 1.5rem; letter-spacing: 0.1em; padding: 12px; background: var(--panel-2); border-radius: 8px; display: inline-block; margin: 12px 0; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }

/* ---- Mobile / responsive ----------------------------------------------- */
/* The app is primarily used by tapping NFC tags on a phone, so the layout
   needs to work on a ~360px screen: wrapping nav, horizontally scrollable
   tables, larger touch targets, and iOS-safe input font sizes. */
@media (max-width: 720px) {
  .container { padding: 0 14px; }
  .page-head { margin: 16px 0 12px; }
  .page-head h1 { font-size: 1.15rem; }

  /* Let wide tables scroll sideways instead of blowing out the page. */
  table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* Bigger touch targets for fingers. */
  .btn { padding: 11px 16px; min-height: 42px; }
  .btn.sm { padding: 8px 12px; min-height: 36px; }
  .nav a { padding: 6px 2px; }

  /* >=16px stops iOS Safari from auto-zooming when an input gets focus. */
  input[type=text], input[type=password], input[type=search],
  input[type=email], textarea, select { font-size: 16px; }

  .tap-hero .big { font-size: 1.7rem; }
  .uid-big { font-size: 1.2rem; word-break: break-all; }
  .stat .n { font-size: 1.6rem; }
  .card { padding: 14px; }
}

@media (max-width: 520px) {
  /* Drop the verbose "Signed in: …" line; Account + Sign out remain. */
  .nav .who { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .page-head .actions { width: 100%; }
  .page-head .actions .btn { flex: 1; text-align: center; }
}

@media (max-width: 380px) {
  .stats { grid-template-columns: 1fr; }
}