:root {
  color-scheme: light dark;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1d21;
  --muted: #666d76;
  --border: #dde1e6;
  --accent: #0a6cff;
  --danger: #d1373f;
  --success: #1a7f37;
}

* { box-sizing: border-box; }

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

a { color: var(--accent); }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
}

.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { text-decoration: none; color: var(--muted); }
.topbar nav a:hover { color: var(--text); }

.logout-form { display: flex; align-items: center; gap: 8px; }
.session-email { color: var(--muted); font-size: 0.9em; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.subtitle { color: var(--muted); margin-top: -8px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; font-size: 0.85em; text-transform: uppercase; }
tr:last-child td { border-bottom: none; }
td.empty { color: var(--muted); text-align: center; padding: 24px; }

.detail-form, .filter-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 480px;
  margin-bottom: 24px;
}

label { font-size: 0.85em; color: var(--muted); margin-top: 12px; }
input[type=text], input[type=email], input[type=password], select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1em;
  background: var(--bg);
  color: var(--text);
}

.checkbox-label { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
.checkbox-label input { margin: 0; }

button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 0.95em;
  background: var(--accent);
  color: #fff;
  margin-top: 16px;
  align-self: flex-start;
}
button.danger { background: var(--danger); }
button:hover { opacity: 0.9; }

.inline-form { display: inline-flex; gap: 6px; margin: 0; align-items: center; }
.inline-form button { margin-top: 0; padding: 4px 10px; font-size: 0.85em; }

.meta { margin-top: 32px; }
.meta dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; }
.meta dt { color: var(--muted); }

.level-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.level-row input { flex: 1; }

.form-actions { margin-top: 20px; }

.flashes { margin-bottom: 20px; }
.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 0.9em;
}
.flash-success { background: #e6f4ea; color: var(--success); }
.flash-error { background: #fbe9e9; color: var(--danger); }

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
  width: 100%;
  max-width: 340px;
}
.login-card h1 { margin: 0 0 4px; font-size: 1.3em; }
.login-card form { display: flex; flex-direction: column; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17191c;
    --surface: #1f2226;
    --text: #eef0f2;
    --muted: #9aa2ab;
    --border: #33383e;
  }
}