:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #dfe3e8;
  --text: #1c2126;
  --muted: #6b7480;
  --accent: #2d6cdf;
  --accent-soft: #e8f0fe;
  --ok: #1a8f4a;
  --warn: #b5761b;
  --bad: #c0392b;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181d;
    --surface: #1c2128;
    --border: #2c343d;
    --text: #e6e9ed;
    --muted: #8d97a3;
    --accent: #5b9bff;
    --accent-soft: #1e2c44;
    --ok: #4ec97e;
    --warn: #e0a63c;
    --bad: #ef6a5c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

h1, h2, h3 { margin: 0 0 .5rem; font-weight: 600; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.1rem; }
h3 { font-size: .95rem; margin-top: 1rem; }

.muted { color: var(--muted); font-size: .875rem; }
.error { color: var(--bad); font-size: .875rem; }
.spacer { flex: 1; }

/* ---------------- login ---------------- */

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.login-card { width: min(360px, 100%); }
.login-card h1 { margin-bottom: 0; }
.login-card p { margin-top: 0; }

/* ---------------- chrome ---------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .6rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}

nav#tabs { display: flex; gap: .25rem; flex-wrap: wrap; }

nav#tabs button {
  background: none;
  border: 1px solid transparent;
  padding: .35rem .7rem;
  border-radius: var(--radius);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}

nav#tabs button:hover { background: var(--bg); }
nav#tabs button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { padding: 1rem; max-width: 1400px; margin: 0 auto; }

/* ---------------- cards, forms ---------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .75rem; }
label.checkbox { display: flex; align-items: center; gap: .4rem; font-size: .875rem; color: var(--text); }

input, select {
  display: block;
  width: 100%;
  margin-top: .25rem;
  padding: .45rem .6rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

label.checkbox input { width: auto; margin: 0; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button {
  font: inherit;
  padding: .45rem .9rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { filter: brightness(1.08); }
button.ghost { background: transparent; }
button.danger { color: var(--bad); }

.row-form {
  display: flex;
  gap: .75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.row-form label { margin-bottom: 0; min-width: 140px; }
.row-form button { margin-bottom: 1px; }

.toolbar {
  display: flex;
  gap: .75rem;
  align-items: center;
  margin-bottom: .75rem;
  flex-wrap: wrap;
}

.toolbar input[type="text"], #device-filter { width: min(320px, 100%); margin-top: 0; }

/* ---------------- tables ---------------- */

.table-scroll {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th, td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-weight: 600; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg); }
td.wrap { white-space: normal; }

.dot { display: inline-block; width: .6rem; height: .6rem; border-radius: 50%; margin-right: .4rem; }
.dot.ok { background: var(--ok); }
.dot.bad { background: var(--muted); }

.badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 999px;
  font-size: .75rem;
  border: 1px solid var(--border);
}

.badge.direct { color: var(--ok); border-color: var(--ok); }
.badge.relay { color: var(--accent); border-color: var(--accent); }
.badge.none { color: var(--muted); }
.badge.warn { color: var(--warn); border-color: var(--warn); }

.summary { display: flex; gap: 1.5rem; margin-bottom: .75rem; font-size: .875rem; color: var(--muted); flex-wrap: wrap; }
.summary b { color: var(--text); }

.code-box {
  display: flex;
  gap: .5rem;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem .75rem;
  margin-bottom: .5rem;
}

.code-box code { flex: 1; font-family: ui-monospace, Consolas, monospace; font-size: .85rem; word-break: break-all; }

.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--surface);
  padding: .6rem 1.1rem;
  border-radius: var(--radius);
  font-size: .875rem;
  z-index: 100;
}
[hidden] { display: none !important; }