:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --accent: #0f172a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: #f8fafc;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.badge { padding: 6px 10px; border: 1px solid var(--border); border-radius: 10px; color: var(--muted); font-size: 13px; background: #fff; }
.brand img { width: 28px; height: 28px; border-radius: 6px; }

.nav-links { display: flex; gap: 12px; align-items: center; }

.wrapper {
  max-width: 960px;
  margin: 24px auto 64px;
  padding: 0 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.hero h1 { margin: 0 0 8px; font-size: 24px; }
.hero p { margin: 0; color: var(--muted); line-height: 1.5; }

.actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

.btn.primary { background: #0f172a; color: #fff; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }

.card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 14px;
}

.card h3 { margin: 0 0 6px; font-size: 14px; color: var(--muted); }
.card .value { font-size: 20px; font-weight: 700; color: var(--text); }
.card .muted { color: var(--muted); font-size: 13px; margin-top: 6px; }

.section-title { margin: 4px 0 6px; color: var(--muted); letter-spacing: 0.3px; text-transform: uppercase; font-size: 11px; }

.search-panel {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  background: #fff;
}

.form-row { display: flex; gap: 10px; flex-wrap: wrap; }

.select, .input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  min-width: 180px;
  font-size: 15px;
}

.status { color: var(--muted); margin-top: 10px; font-size: 14px; }
.status.error { color: #b91c1c; }

.result-box {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 12px;
}

.result-box pre {
  margin: 0;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
}

.doc-list { display: grid; gap: 10px; margin-top: 12px; }
.doc-item { border: 1px solid var(--border); padding: 12px 12px; border-radius: 10px; background: #fff; }
.doc-item code { background: #f8fafc; padding: 3px 6px; border-radius: 6px; border: 1px solid var(--border); }
.doc-item .hint { color: var(--muted); margin-top: 6px; font-size: 13px; }

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

@media (max-width: 640px) {
  .hero h1 { font-size: 20px; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 8px; }
  .form-row { flex-direction: column; }
  .select, .input { width: 100%; }
}