:root {
  --bg: #0d1117;
  --bg-raised: #151b23;
  --bg-input: #0a0e14;
  --border: #2a323d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --green: #3fb950;
  --red: #f85149;
  --yellow: #d29922;
  --radius: 8px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
}

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

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-raised);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  padding: 0 8px 20px 8px;
}
.brand .dot { color: var(--accent); }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }

.navlink {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 14px;
}
.navlink:hover { background: rgba(255,255,255,0.05); text-decoration: none; color: var(--text); }
.navlink.active { background: var(--accent-dim); color: #fff; }
.navlink .icon { width: 1.3em; text-align: center; }

.sidebar-footer {
  margin-top: auto;
  padding: 8px;
  font-size: 12px;
  color: var(--text-dim);
}

.content {
  flex: 1;
  padding: 40px 48px;
  max-width: 1000px;
}

.page h1 {
  font-family: var(--mono);
  font-size: 28px;
  margin: 0 0 4px 0;
}
.page .dot { color: var(--accent); }
.page .lede { color: var(--text-dim); margin-bottom: 28px; }
.page .module-desc { color: var(--text-dim); margin: -12px 0 24px 0; }

/* Home page cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card-icon { font-size: 26px; margin-bottom: 10px; }
.card-title { font-weight: 600; margin-bottom: 6px; }
.card-desc { color: var(--text-dim); font-size: 13px; }

/* Forms */
.form-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 16px;
}
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12px; color: var(--text-dim); }
.field.grow { flex: 1; min-width: 200px; }

input[type=text], input[type=number], select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 11px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 14px;
  min-width: 0;
}
input[type=text]:focus, input[type=number]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

button, .btn {
  background: var(--accent-dim);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  font-family: var(--sans);
}
button:hover { background: var(--accent); }
button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
button.secondary:hover { color: var(--text); border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }

.checkbox-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 16px; }
.checkbox-row label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text-dim); }
.checkbox-row input[type=checkbox] { accent-color: var(--accent); }

/* Result tables -- each value in its own cell so copy/select doesn't grab the label too */
.result-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-family: var(--mono);
  font-size: 13.5px;
}
.result-table tr { border-bottom: 1px solid var(--border); }
.result-table tr:last-child { border-bottom: none; }
.result-table td { padding: 10px 14px; vertical-align: middle; }
.result-table td.label {
  color: var(--text-dim);
  font-family: var(--sans);
  font-size: 12.5px;
  width: 220px;
  white-space: nowrap;
  user-select: none;
}
.result-table td.value {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.result-table td.value span.val { word-break: break-all; }

.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 3px 8px;
  font-size: 11px;
  border-radius: 5px;
  flex-shrink: 0;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }
.copy-btn.copied { color: var(--green); border-color: var(--green); }

.error-box {
  background: rgba(248,81,73,0.1);
  border: 1px solid var(--red);
  color: #ffb4ae;
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}
.note-box {
  background: rgba(210,153,34,0.1);
  border: 1px solid var(--yellow);
  color: #ecc76b;
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 13.5px;
}

.section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 28px 0 10px 0;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-family: var(--mono);
}
.badge.ok { background: rgba(63,185,80,0.15); color: var(--green); }
.badge.err { background: rgba(248,81,73,0.15); color: var(--red); }
.badge.warn { background: rgba(210,153,34,0.15); color: var(--yellow); }

.resolver-panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.resolver-panel .head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 13px;
}
.resolver-panel .records { font-family: var(--mono); font-size: 13px; }
.resolver-panel .rec-row { display: flex; gap: 10px; padding: 3px 0; color: var(--text); }
.resolver-panel .rec-row .ttl { color: var(--text-dim); }

.hint { font-size: 12px; color: var(--text-dim); margin-top: -8px; margin-bottom: 16px; }

.split-table-wrap { max-height: 400px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.split-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 13px; }
.split-table td { padding: 6px 14px; border-bottom: 1px solid var(--border); }

.stack { display: flex; flex-direction: column; gap: 10px; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 240px; }

.big-output {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
}
.sub-output { color: var(--text-dim); font-size: 13px; margin-top: 4px; }

table.ref-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 13px; margin-top: 8px; }
table.ref-table th, table.ref-table td { text-align: left; padding: 6px 12px; border-bottom: 1px solid var(--border); }
table.ref-table th { color: var(--text-dim); font-family: var(--sans); font-weight: 500; font-size: 12px; }

@media (max-width: 760px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; overflow-x: auto; padding: 10px; }
  .sidebar nav { flex-direction: row; }
  .sidebar-footer { display: none; }
  .brand { padding: 0 12px; display: flex; align-items: center; }
  .content { padding: 20px; }
}