:root {
  color-scheme: light dark;
  --bg: #fafaf7;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #2c5e1a;
  --accent-soft: #e8f0e0;
  --border: #d8d8d4;
  --card: #fff;
  --warn: #b25c00;
  --err: #b22222;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14140f;
    --fg: #ececec;
    --muted: #999;
    --accent: #9bd07d;
    --accent-soft: #2a3520;
    --border: #2a2a25;
    --card: #1c1c17;
    --warn: #e8a256;
    --err: #ff7a7a;
  }
}

* { box-sizing: border-box; }

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

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 10;
}
header h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

nav {
  display: flex;
  gap: .5rem;
  margin-top: .75rem;
}
nav button {
  background: transparent;
  border: 1px solid var(--border);
  padding: .35rem .85rem;
  border-radius: 4px;
  cursor: pointer;
  color: var(--fg);
  font: inherit;
}
nav button.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.account-bar {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-top: .75rem;
  font-size: .9rem;
}
.account-bar select, .account-bar button {
  font: inherit;
  padding: .25rem .5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}

.status {
  font-size: .85rem;
  color: var(--muted);
}
.status.warn { color: var(--warn); }
.status.err { color: var(--err); }

main {
  padding: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.tab { display: none; }
.tab.active { display: block; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.card h3 {
  margin: 0 0 .75rem;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
}

.kv {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kv li {
  display: flex;
  justify-content: space-between;
  padding: .25rem 0;
  border-bottom: 1px dashed var(--border);
}
.kv li:last-child { border-bottom: none; }
.kv strong {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
th, td {
  text-align: left;
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 500; font-size: .8rem; text-transform: uppercase; }
td { font-variant-numeric: tabular-nums; }

pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .75rem;
  overflow: auto;
  font-size: .85rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  margin: 0;
}

form fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1rem;
}
form legend {
  padding: 0 .5rem;
  color: var(--muted);
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
form label {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  margin-bottom: .75rem;
  font-size: .9rem;
}
form label.cb {
  flex-direction: row;
  align-items: center;
  gap: .5rem;
}
form input[type="text"], form input[type="number"], form input[type="password"], form textarea, form select {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .35rem .5rem;
  font: inherit;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
form textarea { min-height: 4rem; resize: vertical; }

#tier-weights-grid {
  display: grid;
  grid-template-columns: 1fr 8rem;
  gap: .25rem .75rem;
  align-items: center;
}
#tier-weights-grid input { font-size: .85rem; padding: .2rem .4rem; }

.actions {
  display: flex;
  gap: .75rem;
  align-items: center;
  margin-top: .5rem;
}
.actions button, .actions a {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: .5rem 1rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
.actions a { display: inline-block; }

.hint {
  color: var(--muted);
  font-size: .85rem;
  margin-top: .5rem;
}
.hint code { background: var(--accent-soft); padding: 0 .25em; border-radius: 2px; }

footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .8rem;
  color: var(--muted);
  text-align: center;
}

ol li { margin-bottom: .75rem; }