:root {
  --bg: #f3f4f6;
  --surface: #ffffff;
  --ink: #16202e;
  --ink-2: #4b5666;
  --ink-3: #7c8694;
  --line: #e2e5ea;
  --navy: #1f3a68;
  --navy-hover: #182f55;
  --red: #d9232e;
  --ok: #1d7a46;
  --warn: #a36404;
  --bad: #c0392b;
  --focus: #3b82f6;
  --radius: 8px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1318; --surface: #171c23; --ink: #e8ecf1; --ink-2: #b2bbc6; --ink-3: #808b98; --line: #262e38;
    --navy: #5d8ad6; --navy-hover: #7aa0e0; --ok: #46b97a; --warn: #d9a03f; --bad: #e5675a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-feature-settings: "tnum" 1;
}
h1, h2, p, ol, dl, dd, figure { margin: 0; }
b { font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Brand */
.wordmark { font-weight: 600; letter-spacing: -.02em; color: var(--navy); font-size: 17px; }
.wm-e { color: var(--red); }
.wm-l { font-weight: 400; }

/* Top bar */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  height: 56px; padding: 0 24px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: baseline; gap: 12px; }
.product { color: var(--ink-2); padding-left: 12px; border-left: 1px solid var(--line); }
.session { display: flex; align-items: center; gap: 12px; color: var(--ink-3); }

/* Layout */
.layout {
  display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr); gap: 20px; align-items: start;
  max-width: 1120px; margin: 0 auto; padding: 24px;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 16px; }
  .topbar { padding: 0 16px; }
  .product { display: none; }
}
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; min-width: 0; }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.eyebrow { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 16px; }
.panel-head .eyebrow { margin: 0; }

/* Connection state */
.state { display: flex; gap: 12px; align-items: flex-start; }
.dot { width: 10px; height: 10px; border-radius: 50%; margin-top: 7px; flex: none; background: var(--ink-3); }
.dot.ok { background: var(--ok); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 18%, transparent); }
.dot.warn { background: var(--warn); }
.dot.bad { background: var(--bad); }
.state-label { font-size: 18px; font-weight: 600; letter-spacing: -.01em; }
.state-meta { color: var(--ink-3); }
.block { margin-top: 20px; display: grid; gap: 16px; justify-items: start; }
.block p { color: var(--ink-2); }

.notice {
  margin-top: 16px; padding: 10px 12px; border-radius: 6px; color: var(--bad);
  background: color-mix(in srgb, var(--bad) 8%, transparent); border: 1px solid color-mix(in srgb, var(--bad) 30%, transparent);
}

.steps { padding-left: 20px; color: var(--ink-2); display: grid; gap: 4px; }
.qr-frame { width: 100%; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; display: grid; justify-items: center; gap: 12px; }
#qr { width: 264px; max-width: 100%; height: auto; aspect-ratio: 1; background: #fff; border-radius: 4px; }
#qr:not([src]) { visibility: hidden; }
.qr-frame figcaption { width: 264px; max-width: 100%; display: grid; gap: 6px; }
.timer { height: 3px; background: var(--line); border-radius: 2px; overflow: hidden; }
#timerBar { display: block; height: 100%; width: var(--left, 0%); background: var(--navy); transition: width .9s linear; }

.facts { display: grid; gap: 10px; width: 100%; }
.facts div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; }
.facts dt { color: var(--ink-3); }
.mono { font-family: var(--mono); font-size: 13px; }

/* Forms and buttons */
label { display: block; font-weight: 500; margin: 12px 0 6px; }
input, textarea {
  display: block; width: 100%; padding: 9px 11px; font: inherit; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: 6px;
}
input:focus, textarea:focus { border-color: var(--navy); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--navy) 20%, transparent); }
textarea { resize: vertical; }
button { font: inherit; cursor: pointer; border-radius: 6px; }
button:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--navy); color: #fff; border: 1px solid var(--navy); padding: 9px 16px; font-weight: 600; }
.btn-primary:hover:not(:disabled) { background: var(--navy-hover); }
.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); padding: 8px 14px; font-weight: 500; }
.btn-secondary:hover:not(:disabled) { border-color: var(--ink-3); }
.btn-text { background: none; border: 0; padding: 0; color: var(--navy); font-weight: 500; }
.btn-text:hover { text-decoration: underline; }
.btn-text.danger { color: var(--bad); }
.form-foot { display: flex; align-items: center; gap: 12px; margin-top: 14px; }
.hint { color: var(--ink-3); font-size: 13px; }
.hint.ok { color: var(--ok); }
.hint.bad { color: var(--bad); }

/* Activity */
.summary { color: var(--ink-2); }
.summary b { color: var(--ink); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-weight: 500; color: var(--ink-3); font-size: 12px; padding: 0 12px 8px 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
td.time { white-space: nowrap; color: var(--ink-2); }
td.to { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
td.why { color: var(--ink-3); }
.status { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }
.empty { color: var(--ink-3); padding: 28px 0 8px; text-align: center; }
.footnote { margin-top: 16px; color: var(--ink-3); font-size: 12px; }

/* Login */
body.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box { width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; }
.login-box h1 { font-size: 20px; letter-spacing: -.01em; margin: 20px 0 4px; }
.login-box form { margin-top: 8px; }
.block-btn { width: 100%; margin-top: 20px; }