:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --border: #e2e6ec;
  --text: #1a2233;
  --muted: #62708a;
  --accent: #2563eb;
  --accent-soft: #eaf0fe;
  --ok: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --panel: #161d2c;
    --border: #262f42;
    --text: #e7ecf7;
    --muted: #93a1bd;
    --accent: #5b8def;
    --accent-soft: #1c2740;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
  }
}

* { box-sizing: border-box; }

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

.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
}
.brand-name { font-weight: 700; font-size: 18px; }
.tagline { color: var(--muted); font-size: 13px; }

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 0;
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 16px 10px;
  background: var(--panel);
}

.sidebar .group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 14px 10px 6px;
}

.sidebar button.tool-link {
  display: flex;
  flex-direction: column;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: 13.5px;
  font-family: inherit;
}
.sidebar button.tool-link:hover { background: var(--accent-soft); }
.sidebar button.tool-link.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.sidebar button.tool-link small { color: var(--muted); font-weight: 400; }
.sidebar button.tool-link.active small { color: var(--accent); opacity: 0.8; }

.content { padding: 24px 28px 60px; max-width: 920px; }

.tool-header h1 { margin: 0 0 4px; font-size: 22px; }
.muted { color: var(--muted); margin: 0 0 18px; font-size: 14px; }

.tool-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 18px;
}

.field { display: flex; flex-direction: column; gap: 6px; min-width: 180px; flex: 1 1 180px; }
.field label { font-size: 12.5px; color: var(--muted); }
.field input, .field select {
  padding: 9px 10px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
.field.checkbox { flex-direction: row; align-items: center; gap: 8px; }

button.run {
  padding: 10px 20px;
  border-radius: 7px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  height: 40px;
}
button.run:disabled { opacity: 0.6; cursor: default; }

.status { margin-bottom: 14px; font-size: 14px; }
.status.error { color: var(--bad); }
.status.loading { color: var(--muted); }

.results {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.results h2 { margin-top: 0; font-size: 15px; }
.results h3 { font-size: 13.5px; color: var(--muted); margin: 18px 0 8px; text-transform: uppercase; letter-spacing: 0.04em; }
.results h3:first-child { margin-top: 0; }

table.result-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-bottom: 6px; }
table.result-table th, table.result-table td {
  text-align: left;
  padding: 7px 8px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.result-table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.ok { background: rgba(22,163,74,0.12); color: var(--ok); }
.badge.warn { background: rgba(217,119,6,0.12); color: var(--warn); }
.badge.bad { background: rgba(220,38,38,0.12); color: var(--bad); }

pre.raw {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.kv { display: grid; grid-template-columns: 180px 1fr; gap: 6px 12px; font-size: 13.5px; margin-bottom: 6px; }
.kv .k { color: var(--muted); }

.footer {
  text-align: center;
  padding: 14px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: flex; flex-wrap: wrap; border-right: none; border-bottom: 1px solid var(--border); }
  .sidebar .group-label { display: none; }
  .sidebar button.tool-link { width: auto; }
}