:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --border: #d0d0d0;
  --accent: #2b6cb0;
  --ok: #2f855a;
  --down: #c53030;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #1e1e1e;
    --border: #3a3a3a;
    --accent: #63b3ed;
    --ok: #68d391;
    --down: #fc8181;
  }
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
  margin: 0;
  padding: 0 1.5rem 2rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

h1 { font-size: 1.25rem; margin: 0; }

nav { display: flex; gap: 1rem; margin-left: auto; }
nav a { color: var(--accent); text-decoration: none; font-size: 0.9rem; }
nav a:hover { text-decoration: underline; }

.logout-form { display: flex; align-items: center; gap: 0.75rem; }
.username { opacity: 0.75; font-size: 0.9rem; }

button, input[type="submit"] {
  font: inherit;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin-top: 1rem;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.ok { color: var(--ok); font-weight: 600; }
.down { color: var(--down); font-weight: 600; }

.login-form {
  max-width: 320px;
  margin: 3rem auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.9rem;
}

.login-form input {
  font: inherit;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}

.error { color: var(--down); }
.note { margin-top: 1rem; opacity: 0.7; font-size: 0.9rem; }

.hexdump {
  font-family: ui-monospace, "Cascadia Mono", "Consolas", monospace;
  font-size: 0.8rem;
  word-break: break-all;
  max-width: 40ch;
}