:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #0b1326;
  color: #dae2fd;
}
* {
  box-sizing: border-box;
}
html, body {
  margin: 0;
  min-height: 100%;
  background: #0b1326;
}
button, input, textarea, select {
  font: inherit;
}
button {
  border: none;
  cursor: pointer;
}
.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
}
.nav-rail {
  background: #131b2e;
  border-right: 1px solid #1f2a44;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px 8px;
}
.nav-brand {
  width: 100%;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #6feee1;
  margin-bottom: 16px;
}
.nav-item {
  width: 100%;
  padding: 14px 8px;
  border-radius: 12px;
  background: transparent;
  color: #dae2fd;
  text-align: center;
  transition: background 0.2s ease;
}
.nav-item.active,
.nav-item:hover {
  background: #1f2a44;
}
.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 20px;
  border-radius: 18px;
  background: #17203d;
  border: 1px solid #1f2a44;
}
.topbar h1 {
  margin: 0;
  font-size: clamp(1.75rem, 2vw, 2.4rem);
}
.topbar .subtitle {
  margin: 0 0 8px;
  color: #a7b6cc;
}
.top-actions button {
  padding: 12px 18px;
  border-radius: 10px;
  background: #2d3449;
  color: #dae2fd;
}
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(320px, 1fr);
  gap: 20px;
}
.panel {
  background: #121b31;
  border: 1px solid #1f2a44;
  border-radius: 24px;
  padding: 24px;
}
.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.panel-header h2 {
  margin: 0;
}
.route-selector,
.input-group {
  display: grid;
  gap: 8px;
}
.route-selector label,
.input-group label {
  font-size: 0.85rem;
  color: #a7b6cc;
}
.route-selector select,
input, textarea {
  width: 100%;
  background: #161f35;
  color: #dae2fd;
  border: 1px solid #2d3449;
  border-radius: 14px;
  padding: 12px 14px;
}
textarea {
  resize: vertical;
  min-height: 100px;
}
.chat-window {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 24px 0;
  overflow-y: auto;
  padding-right: 4px;
}
.message {
  max-width: 100%;
  padding: 16px;
  border-radius: 20px;
  line-height: 1.6;
}
.message.user {
  align-self: flex-end;
  background: rgba(111, 238, 225, 0.12);
  border: 1px solid rgba(111, 238, 225, 0.18);
}
.message.assistant {
  align-self: flex-start;
  background: #1d2840;
  border: 1px solid #324361;
}
.chat-input-form {
  display: grid;
  gap: 18px;
}
.form-row {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.form-row .input-group {
  flex: 1;
}
button.primary {
  background: #6feee1;
  color: #003733;
  padding: 14px 22px;
  border-radius: 14px;
  min-width: 140px;
}
button.secondary {
  background: #22304a;
  color: #dae2fd;
  padding: 12px 18px;
  border-radius: 14px;
}
.status-bar {
  min-height: 40px;
  color: #93d7ff;
  font-size: 0.95rem;
}
.panel-side {
  display: grid;
  gap: 20px;
}
.panel-block {
  display: grid;
  gap: 16px;
}
.panel-block h3 {
  margin: 0;
}
.button-grid {
  display: grid;
  gap: 12px;
}
.data-card {
  background: #151f33;
  border: 1px solid #253149;
  border-radius: 18px;
  padding: 18px;
  color: #d7e1f5;
  font-size: 0.95rem;
  white-space: pre-wrap;
}
@media (max-width: 1060px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 720px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .nav-rail {
    flex-direction: row;
    justify-content: center;
    padding: 16px;
  }
}