:root {
  --bg: #0f1419;
  --panel: #1a212b;
  --panel-2: #222c39;
  --border: #2c3744;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #3b82f6;
  --accent-2: #2563eb;
  --danger: #ef4444;
  --ok: #22c55e;
  --warn: #f59e0b;
  --radius: 8px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}
h1, h2 { font-weight: 600; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1em; }
code { background: var(--panel-2); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 2rem; width: 340px; display: flex; flex-direction: column; gap: 0.75rem;
}
.card h1 { margin: 0; }
.card .muted { margin: -0.5rem 0 0.5rem; }

/* Inputs */
label { display: block; font-size: 0.85rem; }
input, select, textarea {
  width: 100%; margin-top: 4px; padding: 8px 10px; background: var(--panel-2);
  border: 1px solid var(--border); border-radius: 6px; color: var(--text); font: inherit;
}
textarea { resize: vertical; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

button {
  cursor: pointer; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font: inherit;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }
button.primary:hover { background: var(--accent); }
button.ghost { background: transparent; }
button.danger { color: var(--danger); border-color: var(--danger); }
button.block { width: 100%; }

/* Layout */
.topbar {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 1rem;
  background: var(--panel); border-bottom: 1px solid var(--border);
}
.spacer { flex: 1; }
.small { font-size: 0.8rem; }
.layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--border); height: calc(100vh - 49px);
}
.editor, .debug { background: var(--bg); overflow-y: auto; padding: 1rem; }
.editor { background: #11171f; }

.field { margin-bottom: 0.75rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); margin: 0 0 1rem; padding: 0.75rem; }
legend { padding: 0 6px; color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.checks { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-bottom: 0.75rem; }
.check { display: flex; align-items: center; gap: 6px; }
.check input { width: auto; margin: 0; }
.dns-hint { display: flex; align-items: flex-end; }

/* Source rows */
.source-row {
  border: 1px solid var(--border); border-radius: 6px; padding: 0.6rem; margin-bottom: 0.6rem;
  background: var(--panel);
}
.source-row .url-line { display: flex; gap: 0.4rem; align-items: center; }
.source-row .url-line input { flex: 1; }
.source-row .opts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.4rem; margin-top: 0.4rem; }
.source-row .opts input { font-size: 0.82rem; }
.source-row .base-line { margin-top: 0.4rem; display: flex; gap: 1rem; align-items: center; }
.src-test-result { font-size: 0.8rem; }

.actions { display: flex; gap: 0.5rem; align-items: center; margin-top: 0.5rem; }
.sub-url { margin-top: 1rem; }
.urlrow { display: flex; gap: 0.4rem; }
.urlrow input { flex: 1; }

/* Debug */
.debug h2 { margin-top: 0; }
.yaml {
  background: #0b0f14; border: 1px solid var(--border); border-radius: 6px; padding: 0.75rem;
  overflow: auto; max-height: 60vh; font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12px; white-space: pre; color: #c9d4df;
}
.tag { display: inline-block; padding: 1px 7px; border-radius: 99px; font-size: 0.75rem; margin-right: 4px; }
.tag.ok { background: rgba(34,197,94,0.15); color: var(--ok); }
.tag.bad { background: rgba(239,68,68,0.15); color: var(--danger); }
.warn-item { color: var(--warn); font-size: 0.85rem; padding: 2px 0; }
.src-status { font-size: 0.85rem; padding: 3px 0; border-bottom: 1px solid var(--border); }

@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .source-row .opts { grid-template-columns: 1fr 1fr; }
}