:root {
  --vl-bg: #090a0f;
  --vl-surface: #11131c;
  --vl-card: #161926;
  --vl-border: #262a3d;
  --vl-text: #f3f4f6;
  --vl-muted: #9ca3af;
  --vl-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
  --vl-accent: #8b5cf6;
  --vl-accent2: #10b981;
  --vl-cyan: #38bdf8;
  --vl-danger: #f43f5e;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  min-height: 100vh;
  background-color: var(--vl-bg);
  color: var(--vl-text);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "PingFang SC", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
.vl-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
}
@media (max-width: 960px) {
  .vl-layout { grid-template-columns: 1fr; }
  .vl-showcase { display: none !important; }
}
.vl-showcase {
  padding: 44px 54px;
  background:
    radial-gradient(circle at 12% 18%, rgba(139, 92, 246, 0.16), transparent 42%),
    radial-gradient(circle at 86% 80%, rgba(16, 185, 129, 0.12), transparent 45%),
    linear-gradient(180deg, #090a0f 0%, #0d0f18 100%);
  border-right: 1px solid var(--vl-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.vl-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.vl-tag {
  font-family: var(--vl-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 2px 9px;
  border-radius: 6px;
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
  border: 1px solid rgba(139, 92, 246, 0.32);
}
.vl-center {
  max-width: 570px;
  margin: auto 0;
}
.vl-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--vl-mono);
  font-size: 11.5px;
  color: #6ee7b7;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.28);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.vl-center h1 {
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
}
.vl-center p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--vl-muted);
  margin-bottom: 28px;
}
.vl-dag-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 13px;
}
.vl-node-card {
  background: rgba(22, 25, 38, 0.78);
  border: 1px solid var(--vl-border);
  border-radius: 11px;
  padding: 15px 16px;
}
.vl-node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--vl-mono);
  font-size: 11.5px;
  color: #a5b4fc;
  margin-bottom: 7px;
}
.vl-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--vl-accent2);
  box-shadow: 0 0 8px var(--vl-accent2);
}
.vl-node-title {
  font-size: 14px;
  font-weight: 600;
  color: #f9fafb;
  margin-bottom: 4px;
}
.vl-node-meta {
  font-family: var(--vl-mono);
  font-size: 11.5px;
  color: #6b7280;
}
.vl-foot {
  font-family: var(--vl-mono);
  font-size: 11.5px;
  color: #6b7280;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(38, 42, 61, 0.7);
  padding-top: 16px;
}
.vl-auth-pane {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  background: var(--vl-surface);
}
.vl-auth-card {
  width: 100%;
  max-width: 416px;
  background: var(--vl-card);
  border: 1px solid var(--vl-border);
  border-radius: 14px;
  padding: 34px 30px;
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.45);
}
.vl-auth-card h2 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 6px;
}
.vl-auth-card .vl-sub {
  font-size: 13px;
  color: var(--vl-muted);
  margin-bottom: 24px;
}
.vl-group {
  margin-bottom: 16px;
}
.vl-group label {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 500;
  color: #d1d5db;
  margin-bottom: 6px;
}
.vl-group label span.mono {
  font-family: var(--vl-mono);
  font-size: 11px;
  color: #6b7280;
}
.vl-input, .vl-select {
  width: 100%;
  height: 42px;
  background: #0b0d14;
  border: 1px solid var(--vl-border);
  border-radius: 8px;
  padding: 0 13px;
  color: #f3f4f6;
  font-size: 13.5px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.vl-input:focus, .vl-select:focus {
  outline: none;
  border-color: var(--vl-accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.22);
}
.vl-err {
  display: none;
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.35);
  color: #fda4af;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 12.5px;
  margin-bottom: 15px;
}
.vl-btn {
  width: 100%;
  height: 43px;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 4px;
  transition: opacity 0.15s;
}
.vl-btn:hover { opacity: 0.93; }
.vl-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.vl-hint {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--vl-border);
  font-family: var(--vl-mono);
  font-size: 11.5px;
  color: #6b7280;
  line-height: 1.6;
}