:root {
  --bg: #0a0a0f;
  --panel: #11111a;
  --panel-2: #161622;
  --border: #1f1f2e;
  --text: #e6e6f0;
  --muted: #8a8aa3;
  --accent: #a78bfa;
  --accent-strong: #c4b5fd;
  --green: #4ade80;
  --red: #f87171;
  --yellow: #fbbf24;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font: 15px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10; background: rgba(10,10,15,.85); backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.brand:hover { text-decoration: none; }
.brand .dot { width: 8px; height: 8px; border-radius: 999px; background: var(--accent); box-shadow: 0 0 10px rgba(167,139,250,.6); }
.brand .logo { font-weight: 600; letter-spacing: -0.01em; color: var(--text); }
.brand .tag { color: var(--muted); font-size: 12px; letter-spacing: 0.04em; text-transform: lowercase; }
.nav { display: flex; gap: 4px; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-size: 13px; padding: 6px 12px; border-radius: 6px; transition: all 0.15s; display: inline-flex; align-items: center; gap: 6px; }
.nav a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.nav a.active { color: var(--text); background: var(--panel); }
.badge { background: var(--accent); color: #0a0a0f; font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 999px; min-width: 16px; text-align: center; }

main { max-width: 880px; margin: 0 auto; padding: 32px 24px 80px; }
.view.narrow { max-width: 600px; }

.hero { margin-bottom: 28px; }
.hero h1 { font-size: 30px; margin: 0 0 8px; letter-spacing: -0.02em; }
.lede { color: var(--muted); margin: 0 0 16px; max-width: 620px; }

h1 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 18px; margin: 32px 0 12px; letter-spacing: -0.01em; color: var(--text); }
h3 { font-size: 14px; margin: 18px 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 8px; font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #0a0a0f; border-color: var(--accent); font-weight: 600; }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--red); }
.btn.danger:hover { border-color: var(--red); background: rgba(248,113,113,.08); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.back { color: var(--muted); font-size: 13px; display: inline-block; margin-bottom: 12px; }

.niche-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; margin-bottom: 14px; display: flex; justify-content: space-between; align-items: flex-start; gap: 16px;
  transition: border 0.15s;
}
.niche-card:hover { border-color: var(--accent); }
.niche-card .nc-main { flex: 1; min-width: 0; }
.niche-card .nc-name { font-weight: 600; font-size: 16px; margin: 0 0 4px; }
.niche-card .nc-desc { color: var(--muted); font-size: 13px; margin: 0 0 8px; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.niche-card .nc-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.niche-card .nc-actions { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; flex-shrink: 0; }

.pill {
  display: inline-block; padding: 3px 10px; font-size: 11px; border-radius: 999px;
  background: rgba(167,139,250,.08); color: rgba(167,139,250,.85);
  border: 1px solid rgba(167,139,250,.2); font-weight: 500; letter-spacing: 0.02em;
}
.pill.green { background: rgba(74,222,128,.08); color: var(--green); border-color: rgba(74,222,128,.25); }
.pill.red { background: rgba(248,113,113,.08); color: var(--red); border-color: rgba(248,113,113,.25); }
.pill.yellow { background: rgba(251,191,36,.08); color: var(--yellow); border-color: rgba(251,191,36,.25); }
.pill.muted { background: rgba(138,138,163,.08); color: var(--muted); border-color: rgba(138,138,163,.2); }

.niche-head { margin-bottom: 14px; }
.niche-meta { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.niche-actions { display: flex; gap: 8px; margin: 14px 0 22px; }
.desc { color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-size: 14px; white-space: pre-wrap; }

.src-add { display: flex; gap: 8px; margin: 12px 0; flex-wrap: wrap; }
.src-add select, .src-add input { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); padding: 8px 12px; border-radius: 8px; font-size: 13px; }
.src-add input { flex: 1; min-width: 240px; }

.src-list, .brief-list, .prop-list { list-style: none; padding: 0; margin: 0; }
.src-list li, .brief-list li, .prop-list li {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px; margin-bottom: 6px; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.src-kind { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; color: var(--accent); padding: 2px 8px; background: rgba(167,139,250,.08); border-radius: 4px; }
.src-target { flex: 1; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.src-meta { font-size: 11px; color: var(--muted); }

.brief-list a { color: var(--text); font-weight: 500; }
.brief-list a:hover { color: var(--accent); }
.brief-meta { color: var(--muted); font-size: 12px; margin-left: 8px; }

.prop-rationale { font-size: 12px; color: var(--muted); margin-top: 4px; }

form label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
form input, form textarea, form select {
  width: 100%; margin-top: 6px; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px; font-size: 14px;
  font-family: inherit;
}
form input:focus, form textarea:focus, form select:focus { outline: none; border-color: var(--accent); }
form textarea { resize: vertical; min-height: 70px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.form-actions { display: flex; gap: 8px; margin-top: 20px; }
.hint { color: var(--muted); font-weight: 400; font-size: 12px; margin-left: 4px; }
.ai-assist {
  background: linear-gradient(140deg, rgba(167,139,250,0.08), rgba(167,139,250,0.02));
  border: 1px solid rgba(167,139,250,0.25); border-radius: 12px; padding: 16px 18px; margin-bottom: 22px;
}
.ai-head { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; }
.ai-icon { font-size: 22px; line-height: 1; }
.ai-title { font-weight: 600; font-size: 14px; }
.ai-sub { font-size: 12px; }
.ai-assist textarea { width: 100%; background: rgba(0,0,0,0.25); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px; font-size: 14px; font-family: inherit; resize: vertical; min-height: 50px; }
.ai-assist textarea:focus { outline: none; border-color: var(--accent); }
.ai-actions { display: flex; gap: 10px; align-items: center; margin-top: 10px; }
.ai-status { font-size: 12px; color: var(--muted); }
.ai-status.ok { color: var(--green); }
.ai-status.err { color: var(--red); }
.ai-suggested { margin: 18px 0 4px; padding: 12px 14px; background: rgba(167,139,250,0.04); border: 1px dashed rgba(167,139,250,0.3); border-radius: 8px; }
.ai-suggested-head { font-size: 13px; font-weight: 500; margin-bottom: 8px; color: var(--accent-strong); }
.ai-suggested .src-list li { background: var(--panel-2); }
.advanced { margin: 16px 0 8px; padding: 10px 14px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; }
.advanced summary { cursor: pointer; color: var(--muted); font-size: 13px; user-select: none; }
.advanced summary:hover { color: var(--text); }
.advanced[open] summary { margin-bottom: 10px; }
.advanced input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
@media (max-width: 640px) { .grid2, .grid3 { grid-template-columns: 1fr; } }

.muted { color: var(--muted); }
.small { font-size: 12px; font-weight: 400; }

.runlog { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-size: 11px; color: var(--muted); max-height: 280px; overflow: auto; white-space: pre-wrap; }

.empty { color: var(--muted); padding: 22px; text-align: center; background: var(--panel); border: 1px dashed var(--border); border-radius: 12px; }

.toast { position: fixed; bottom: 20px; right: 20px; background: var(--panel-2); border: 1px solid var(--border); padding: 10px 16px; border-radius: 8px; font-size: 13px; box-shadow: 0 4px 24px rgba(0,0,0,.4); animation: in 0.2s ease-out; z-index: 100; }
.toast.error { border-color: var(--red); color: var(--red); }
.toast.success { border-color: var(--green); color: var(--green); }
@keyframes in { from { transform: translateY(8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }