:root {
  --bg: #f7f7f8;
  --card: #ffffff;
  --fg: #1a1a1a;
  --muted: #667085;
  --border: #e4e7ec;
  --accent: #1f6feb;
  --accent-hover: #1558c2;
  --ok: #027a48;
  --ok-bg: #ecfdf3;
  --err: #b42318;
  --err-bg: #fef3f2;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 600; font-size: 16px; }

.topbar nav a {
  margin-left: 18px;
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
}

.topbar nav a:hover { color: var(--accent); }

.container {
  max-width: 920px;
  margin: 24px auto;
  padding: 0 24px 60px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 28px;
  margin-bottom: 20px;
}

h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 18px; margin: 0 0 14px; }
h3 { font-size: 14px; margin: 0 0 4px; color: var(--muted); font-weight: 500; }

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

.form label {
  display: block;
  margin-bottom: 16px;
}
.form label span { display: block; font-weight: 500; font-size: 14px; margin-bottom: 6px; }
.form label small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.form input[type=text], .form input[type=password] {
  width: 100%;
  padding: 8px 10px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
}

button.primary {
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
button.primary:hover { background: var(--accent-hover); }

.errors {
  background: var(--err-bg);
  color: var(--err);
  border: 1px solid #fecdca;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 14px;
}

.notice.ok {
  background: var(--ok-bg);
  color: var(--ok);
  border: 1px solid #a6f4c5;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 14px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th, .table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}
.table th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }

.mono { font-family: var(--mono); }
.small { font-size: 12px; color: var(--muted); }

code {
  background: #f1f3f5;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 13px;
}

.grid.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
}

.hint {
  background: #f5f8fb;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  margin: 6px 0 18px;
  line-height: 1.7;
}
.hint code { background: #e8eef5; }
.hint strong { color: var(--fg); }

.chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.chip-plate { background: #e8f0fe; color: #1558c2; }
.chip-overview { background: #eef7ee; color: #1a7a3a; }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 20px;
}