:root {
  --vb-linen: #EDEAE3;
  --vb-sienna: #8B4513;
  --vb-gold: #C9963A;
  --vb-cream: #F5F2EB;
  --vb-ink: #2C2416;
  --vb-dot: rgba(139,69,19,0.12);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Georgia", serif;
  background: var(--vb-linen);
  color: var(--vb-ink);
  background-image: radial-gradient(var(--vb-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  min-height: 100vh;
}
.topbar {
  display: flex; align-items: center; gap: .75rem;
  padding: .75rem 1.25rem;
  background: var(--vb-cream);
  border-bottom: 1px solid rgba(139,69,19,0.15);
  position: sticky; top: 0; z-index: 100;
}
.topbar-title { font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; color: var(--vb-sienna); font-weight: 600; }
.sovereign-badge {
  margin-left: auto; font-size: .7rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--vb-sienna);
  border: 1px solid var(--vb-sienna); border-radius: 20px;
  padding: .2rem .6rem;
}
.chat-area {
  max-width: 720px; margin: 0 auto; padding: 1.5rem 1rem;
  display: flex; flex-direction: column; gap: 1rem;
  min-height: calc(100vh - 120px);
}
.message { max-width: 85%; padding: .75rem 1rem; border-radius: 12px; line-height: 1.6; font-size: .92rem; }
.message.user { background: var(--vb-sienna); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.message.agent { background: var(--vb-cream); color: var(--vb-ink); align-self: flex-start; border-bottom-left-radius: 4px; border: 1px solid rgba(139,69,19,0.15); }
.input-bar {
  position: sticky; bottom: 0;
  background: var(--vb-cream);
  border-top: 1px solid rgba(139,69,19,0.15);
  padding: .75rem 1rem;
  display: flex; gap: .5rem; align-items: flex-end;
}
.input-bar textarea {
  flex: 1; border: 1px solid rgba(139,69,19,0.2);
  border-radius: 8px; padding: .6rem .8rem;
  background: var(--vb-linen); color: var(--vb-ink);
  font-family: inherit; font-size: .92rem;
  resize: none; min-height: 44px; max-height: 160px;
}
.input-bar textarea:focus { outline: none; border-color: var(--vb-sienna); }
.btn-send {
  background: var(--vb-sienna); color: #fff;
  border: none; border-radius: 8px;
  padding: .6rem 1.1rem; cursor: pointer;
  font-size: .85rem; letter-spacing: .05em;
  align-self: flex-end;
}
.btn-send:hover { background: var(--vb-gold); }
.drawer {
  position: fixed; top: 0; right: -380px; width: 360px; height: 100vh;
  background: var(--vb-cream); border-left: 1px solid rgba(139,69,19,0.15);
  padding: 1.25rem; transition: right .3s ease; z-index: 200;
  display: flex; flex-direction: column; gap: 1rem; overflow-y: auto;
}
.drawer.open { right: 0; }
.drawer h2 { font-size: .9rem; letter-spacing: .1em; text-transform: uppercase; color: var(--vb-sienna); }
.memory-editor {
  flex: 1; background: var(--vb-linen); border: 1px solid rgba(139,69,19,0.2);
  border-radius: 8px; padding: .75rem; color: var(--vb-ink);
  font-family: inherit; font-size: .85rem; resize: none;
  min-height: 300px;
}
.btn-primary { background: var(--vb-sienna); color: #fff; border: none; border-radius: 8px; padding: .5rem 1rem; cursor: pointer; font-size: .85rem; }
.btn-secondary { background: transparent; color: var(--vb-sienna); border: 1px solid var(--vb-sienna); border-radius: 8px; padding: .5rem 1rem; cursor: pointer; font-size: .85rem; }
.icon-btn { background: transparent; border: none; cursor: pointer; color: var(--vb-sienna); font-size: 1.1rem; padding: .3rem; border-radius: 6px; }
.icon-btn:hover { background: rgba(139,69,19,0.08); }
.soul-covenant {
  background: var(--vb-linen); border: 1px solid var(--vb-gold);
  border-radius: 8px; padding: .75rem 1rem; font-size: .85rem;
  color: var(--vb-ink); margin-bottom: .5rem;
}
.soul-covenant .covenant-title { color: var(--vb-gold); font-weight: 600; margin-bottom: .25rem; }
.upload-zone {
  border: 2px dashed rgba(139,69,19,0.3); border-radius: 10px;
  padding: 1.5rem; text-align: center; color: rgba(44,36,22,0.5);
  font-size: .85rem; cursor: pointer; transition: border-color .2s;
  background: var(--vb-linen);
}
.upload-zone:hover, .upload-zone.drag-over { border-color: var(--vb-sienna); color: var(--vb-sienna); }
.filter-chip {
  background: transparent; border: 1px solid rgba(139,69,19,0.25);
  border-radius: 20px; padding: .25rem .75rem;
  font-size: .75rem; cursor: pointer; color: var(--vb-sienna);
}
.filter-chip.active { background: var(--vb-sienna); color: #fff; border-color: var(--vb-sienna); }
.canvas-input {
  width: 100%; background: var(--vb-linen); border: 1px solid rgba(139,69,19,0.2);
  border-radius: 8px; padding: .5rem .75rem; color: var(--vb-ink);
  font-family: inherit; font-size: .85rem;
}
.empty-hint { color: rgba(44,36,22,0.4); font-size: .85rem; font-style: italic; text-align: center; margin: 2rem 0; }
.neo4j-node {
  display: inline-block; background: var(--vb-cream);
  border: 1px solid var(--vb-gold); border-radius: 20px;
  padding: .2rem .7rem; font-size: .75rem; color: var(--vb-gold);
  margin: .2rem;
}