:root {
  --bg: #0f1115;
  --panel: #161a21;
  --panel-2: #1c212a;
  --line: #262c37;
  --text: #e6e9ef;
  --muted: #98a2b3;
  --accent: #6ea8fe;
  --ok: #57d9a3;
  --warn: #f5c46b;
  --danger: #f06a6a;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --panel-2: #f0f2f6;
    --line: #dfe3ea;
    --text: #131720;
    --muted: #5c6675;
    --accent: #1f5fd0;
    --ok: #12805c;
    --warn: #97640a;
    --danger: #c2352f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ---------------------------------------------------------------- topbar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--text);
}
.brand span { color: var(--accent); }

.topbar nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.94rem;
}
.topbar nav a:hover, .topbar nav a.on { color: var(--text); }

.env {
  font: 600 0.7rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.env.prod { color: var(--ok); border-color: var(--ok); }
.env.dev { color: var(--warn); border-color: var(--warn); }

/* --------------------------------------------------------------- content */

h1 { font-size: 1.9rem; letter-spacing: -0.02em; margin: 0 0 0.6rem; }
h2 { font-size: 1.25rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1rem; margin: 0 0 0.4rem; }

.lede { color: var(--muted); max-width: 68ch; margin-top: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.hint { color: var(--muted); font-size: 0.85rem; }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
a { color: var(--accent); }

.narrow { max-width: 30rem; }

.hero { padding: 2rem 0 1rem; }
.hero h1 { font-size: 2.4rem; }
.cta { display: flex; gap: 0.75rem; margin-top: 1.5rem; flex-wrap: wrap; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
}
.card p { color: var(--muted); font-size: 0.92rem; margin: 0.4rem 0; }
.card p:last-child { margin-bottom: 0; }

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--panel-2);
  padding: 0.1rem 0.32rem;
  border-radius: 5px;
}

pre.stack {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font: 0.8rem/1.5 var(--mono);
}

/* ----------------------------------------------------------------- forms */

form { margin: 1.25rem 0; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0.9rem 0 0.3rem;
}

input[type="text"], input[type="email"], input[type="password"], input:not([type]), textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { resize: vertical; font-family: var(--mono); font-size: 0.9rem; }

button, .button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: #0b1020;
  border: 1px solid transparent;
  border-radius: 8px;
  font: 600 0.94rem/1.4 inherit;
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button:hover { filter: brightness(1.08); }

.button.ghost, button.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
button.danger, .button.danger { background: var(--danger); color: #fff; }

button.link {
  background: none;
  border: none;
  color: var(--accent);
  padding: 0;
  margin: 0;
  font-size: 0.88rem;
  cursor: pointer;
}
button.link.danger { color: var(--danger); background: none; }

.inline { display: inline; margin: 0; }
.row { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.75rem; }
.button.small { margin-top: 0; padding: 0.3rem 0.6rem; font-size: 0.82rem; }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---------------------------------------------------------------- alerts */

.alert {
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.92rem;
  background: var(--panel);
}
.alert ul { margin: 0; padding-left: 1.1rem; }
.alert.error { border-left-color: var(--danger); }
.alert.notice { border-left-color: var(--accent); }
.alert.dev { border-left-color: var(--warn); word-break: break-all; }

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
td.ua, td.meta { max-width: 22rem; overflow-wrap: anywhere; color: var(--muted); }

.pill {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--muted);
}
.pill.admin { color: var(--accent); border-color: var(--accent); }
.pill.danger { color: var(--danger); border-color: var(--danger); }

/* ------------------------------------------------------------------ misc */

.qr {
  display: block;
  margin: 1.25rem 0;
  border-radius: var(--radius);
  background: #fff;
  padding: 0.5rem;
}
.secret { font-size: 0.95em; letter-spacing: 0.06em; overflow-wrap: anywhere; }

.codes {
  list-style: none;
  padding: 1rem;
  margin: 1rem 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--mono);
}

.steps { color: var(--muted); font-size: 0.92rem; padding-left: 1.2rem; }
details { margin-top: 2rem; }
summary { cursor: pointer; color: var(--muted); font-size: 0.9rem; }

.pager { display: flex; gap: 1rem; align-items: center; color: var(--muted); font-size: 0.9rem; }

footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.82rem;
}