/* Design System v2.1 tokens — DHQ Smart Bot */
:root,
[data-theme="light"] {
  --color-bg: #f8f9fc;
  --color-bg-mesh: radial-gradient(ellipse 70% 45% at 15% -5%, rgba(94, 92, 230, 0.07), transparent),
                   radial-gradient(ellipse 50% 35% at 92% 8%, rgba(124, 110, 216, 0.05), transparent);
  --color-surface: rgba(255, 255, 255, 0.92);
  --color-surface-solid: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.14);
  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #ffffff;
  --color-accent-1: #5e5ce6;
  --color-accent-2: #6d6ae8;
  --gradient-accent: linear-gradient(160deg, #5e5ce6 0%, #7c6ee4 100%);
  --gradient-accent-hover: linear-gradient(160deg, #5452d4 0%, #6e62d8 100%);
  --color-accent-muted: rgba(94, 92, 230, 0.08);
  --color-accent-subtle: rgba(94, 92, 230, 0.04);
  --color-success: #059669;
  --color-success-bg: rgba(5, 150, 105, 0.1);
  --color-warning: #d97706;
  --color-warning-bg: rgba(217, 119, 6, 0.1);
  --color-error: #dc2626;
  --color-error-bg: rgba(220, 38, 38, 0.08);
  --color-info: #2563eb;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.04);
  --shadow-md: 0 4px 20px rgba(17, 24, 39, 0.06);
  --shadow-lg: 0 12px 40px rgba(17, 24, 39, 0.08);
  --shadow-accent: 0 4px 14px rgba(94, 92, 230, 0.22);
}

[data-theme="dark"] {
  --color-bg: #0c0c10;
  --color-bg-mesh: radial-gradient(ellipse 60% 40% at 12% 0%, rgba(94, 92, 230, 0.12), transparent),
                   radial-gradient(ellipse 45% 35% at 88% 15%, rgba(124, 110, 216, 0.06), transparent);
  --color-surface: rgba(22, 22, 28, 0.88);
  --color-surface-solid: #16161c;
  --color-surface-elevated: #1e1e26;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.12);
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-inverse: #0f172a;
  --color-accent-muted: rgba(124, 120, 232, 0.14);
  --color-accent-subtle: rgba(124, 120, 232, 0.06);
  --color-success-bg: rgba(5, 150, 105, 0.12);
  --color-warning-bg: rgba(217, 119, 6, 0.15);
  --color-error-bg: rgba(220, 38, 38, 0.12);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-accent: 0 4px 20px rgba(94, 92, 230, 0.2);
}

:root {
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-display: "Instrument Serif", Georgia, serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.3125rem;
  --text-2xl: 1.5rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --transition: 0.15s ease;
  --sidebar-width: 260px;
  --color-accent-solid: #5e5ce6;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  background-image: var(--color-bg-mesh);
  min-height: 100vh;
}
a { color: var(--color-accent-solid); text-decoration: none; }
a:hover { text-decoration: underline; }

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1rem; border-radius: var(--radius-md);
  border: 1px solid transparent; font: inherit; font-weight: 600;
  font-size: var(--text-sm); cursor: pointer; transition: background var(--transition), box-shadow var(--transition);
}
.btn-primary {
  background: var(--gradient-accent); color: #fff; box-shadow: var(--shadow-accent);
}
.btn-primary:hover { background: var(--gradient-accent-hover); }
.btn-secondary {
  background: var(--color-surface-solid); color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn-danger { background: var(--color-error); color: #fff; }
.btn-ghost { background: transparent; color: var(--color-text-secondary); }

.input, select, textarea {
  width: 100%; padding: 0.6rem 0.75rem; border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong); background: var(--color-surface-solid);
  color: var(--color-text); font: inherit; font-size: var(--text-sm);
}
.input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--color-accent-solid);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}
.label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: 0.35rem; color: var(--color-text-secondary); }
.form-group { margin-bottom: 1rem; }

.card {
  background: var(--color-surface-solid); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 1.25rem; box-shadow: var(--shadow-sm);
}
.badge {
  display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px;
  font-size: var(--text-xs); font-weight: 600; background: var(--color-accent-muted); color: var(--color-accent-solid);
}
.badge-playground { background: var(--color-info, #2563eb); color: #fff; opacity: 0.9; }
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warn { background: var(--color-warning-bg); color: var(--color-warning); }

.flash { padding: 0.75rem 1rem; border-radius: var(--radius-md); margin-bottom: 1rem; font-size: var(--text-sm); }
.flash-success { background: var(--color-success-bg); color: var(--color-success); }
.flash-error { background: var(--color-error-bg); color: var(--color-error); }
.flash-warning { background: var(--color-warning-bg); color: var(--color-warning); }

.table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.table th, .table td { text-align: left; padding: 0.75rem; border-bottom: 1px solid var(--color-border); }
.table th { color: var(--color-text-muted); font-weight: 600; }

/* Layout */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-width); flex-shrink: 0;
  background: var(--color-surface-solid); border-right: 1px solid var(--color-border);
  padding: 1.25rem 1rem; display: flex; flex-direction: column; gap: 0.25rem;
  position: sticky; top: 0; height: 100vh;
}
.sidebar-brand {
  font-weight: 700; font-size: var(--text-lg); color: var(--color-text);
  padding: 0.5rem 0.75rem 1.25rem; letter-spacing: -0.02em;
}
.sidebar-brand span { color: var(--color-accent-solid); }
.nav-link {
  display: block; padding: 0.55rem 0.75rem; border-radius: var(--radius-md);
  color: var(--color-text-secondary); font-size: var(--text-sm); font-weight: 500;
  text-decoration: none;
}
.nav-link:hover { background: var(--color-accent-subtle); color: var(--color-text); text-decoration: none; }
.nav-link.active { background: var(--color-accent-muted); color: var(--color-accent-solid); font-weight: 600; }
.sidebar-footer { margin-top: auto; padding-top: 1rem; font-size: var(--text-xs); color: var(--color-text-muted); }
.main { flex: 1; padding: 1.75rem 2rem; max-width: 1400px; width: 100%; }
.main.main-builder {
  max-width: none;
  padding: 1rem 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.page-title { font-size: var(--text-2xl); font-weight: 700; margin: 0 0 0.35rem; letter-spacing: -0.02em; }
.page-sub { color: var(--color-text-secondary); margin: 0 0 1.5rem; font-size: var(--text-sm); }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; gap: 1rem; }
.theme-toggle {
  border: 1px solid var(--color-border-strong); background: var(--color-surface-solid);
  border-radius: var(--radius-md); padding: 0.4rem 0.7rem; cursor: pointer; font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

/* Login */
.login-page {
  min-height: 100vh; display: grid; place-items: center; padding: 2rem;
  background-image: var(--color-bg-mesh);
}
.login-card { width: 100%; max-width: 400px; }
.login-card h1 { margin: 0 0 0.25rem; font-size: var(--text-2xl); }
.login-card .brand { color: var(--color-accent-solid); font-weight: 700; margin-bottom: 1.5rem; }

/* Chat / playground */
.playground-layout { display: grid; grid-template-columns: 1fr 300px; gap: 1rem; min-height: 560px; }
.chat-panel { display: flex; flex-direction: column; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface-solid); overflow: hidden; }
.chat-messages { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.75rem; min-height: 400px; max-height: 60vh; }
.bubble { max-width: 80%; padding: 0.65rem 0.9rem; border-radius: var(--radius-lg); font-size: var(--text-sm); line-height: 1.45; }
.bubble-user { align-self: flex-end; background: var(--gradient-accent); color: #fff; }
.bubble-assistant { align-self: flex-start; background: var(--color-accent-muted); color: var(--color-text); }
.bubble-system { align-self: center; color: var(--color-text-muted); font-size: var(--text-xs); }
.chat-input-row { display: flex; gap: 0.5rem; padding: 0.75rem; border-top: 1px solid var(--color-border); }
.state-panel { font-size: var(--text-sm); }
.state-panel h3 { margin: 0 0 0.75rem; font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-muted); }

.pg-trace-panel { margin-top: 1rem; }
.pg-trace-toolbar {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.5rem;
}
.pg-trace-toolbar h3 {
  margin: 0; flex: 1; font-size: var(--text-sm);
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-muted);
}
.pg-trace-hint {
  margin: 0 0 0.75rem; font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.4;
}
.pg-trace-toast { font-size: 12px; color: var(--color-success, #2a9d5c); }
.pg-trace-pre {
  margin: 0; max-height: 420px; overflow: auto;
  padding: 0.85rem 1rem; border-radius: var(--radius-md, 8px);
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-word;
}
.slot-row { display: flex; justify-content: space-between; gap: 0.5rem; padding: 0.35rem 0; border-bottom: 1px solid var(--color-border); }
.slot-empty { color: var(--color-text-muted); }
.typing { color: var(--color-text-muted); font-size: var(--text-xs); padding: 0 1rem 0.5rem; }

/* Script builder — full width + pan/zoom canvas */
.builder-page { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.builder {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 300px;
  gap: 0;
  flex: 1;
  min-height: calc(100vh - 200px);
  height: calc(100vh - 200px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-solid);
  width: 100%;
}
.builder-palette {
  border-right: 1px solid var(--color-border);
  padding: 0.75rem;
  background: var(--color-bg);
  overflow-y: auto;
  z-index: 3;
}
.builder-palette h4 { margin: 0.75rem 0 0.4rem; font-size: var(--text-xs); text-transform: uppercase; color: var(--color-text-muted); }
.palette-item {
  padding: 0.45rem 0.6rem; margin-bottom: 0.35rem; border-radius: var(--radius-sm);
  border: 1px dashed var(--color-border-strong); font-size: var(--text-xs); cursor: grab;
  background: var(--color-surface-solid);
}
.builder-help {
  font-size: var(--text-xs); color: var(--color-text-secondary); margin: 0 0 0.75rem;
  padding: 0.65rem 0.85rem; background: var(--color-accent-muted); border-radius: var(--radius-md);
  line-height: 1.45;
  flex-shrink: 0;
}
.builder-hint { font-size: 11px; color: var(--color-text-muted); margin: 0 0 0.75rem; line-height: 1.4; }
.kb-checkboxes { display: flex; flex-direction: column; gap: 0.35rem; max-height: 180px; overflow-y: auto; }
.kb-check {
  display: flex; align-items: flex-start; gap: 0.4rem;
  font-size: 12px; cursor: pointer; padding: 0.25rem 0;
}
.kb-check .kb-slug { color: var(--color-text-muted); font-size: 10px; }
.builder-canvas-wrap {
  position: relative;
  overflow: hidden;
  min-width: 0;
  background: var(--color-bg);
  cursor: grab;
  touch-action: none;
}
.builder-canvas-wrap.is-panning { cursor: grabbing; }
.canvas-zoombar {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem;
  background: var(--color-surface-solid);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.canvas-zoombar button {
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 28px;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
}
.canvas-zoombar button:hover { border-color: var(--color-accent-solid); color: var(--color-accent-solid); }
.canvas-zoombar .zoom-label {
  min-width: 3.2rem;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
}
.canvas-zoombar .zoom-wide { width: auto; padding: 0 0.5rem; font-size: 11px; font-weight: 600; }
.canvas-world {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: 0 0;
  will-change: transform;
}
#script-canvas {
  position: relative;
  width: 4000px;
  height: 3000px;
  background:
    linear-gradient(var(--color-border) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--color-bg);
}
.node {
  position: absolute; min-width: 170px; max-width: 240px; padding: 0.55rem 0.65rem 0.45rem;
  border-radius: var(--radius-md); border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated); box-shadow: var(--shadow-sm);
  cursor: move; font-size: var(--text-xs); user-select: none; z-index: 2;
}
.node.selected { border-color: var(--color-accent-solid); box-shadow: var(--shadow-accent); }
.node.link-source { outline: 2px dashed var(--color-accent-solid); }
body.linking-mode .node.link-targetable { cursor: crosshair; box-shadow: 0 0 0 2px var(--color-success); }
body.linking-mode { cursor: crosshair; }
.node-trigger { border-left: 3px solid var(--color-accent-solid); }
.node-interrupt { border-left: 3px solid var(--color-warning); }
.node-step { border-left: 3px solid var(--color-success); }
.node-condition { border-left: 3px solid var(--color-info, #2563eb); }
.node-service { border-left: 3px solid var(--color-text-muted); }
.node-title { font-weight: 700; margin-bottom: 0.15rem; }
.node-meta { opacity: 0.65; margin-bottom: 0.4rem; word-break: break-all; }
.node-ports { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-bottom: 0.35rem; }
.node-ports .port {
  border: 1px solid var(--color-accent-solid); background: var(--color-accent-muted);
  color: var(--color-accent-solid); border-radius: 999px; padding: 0.15rem 0.45rem;
  font-size: 10px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.node-ports .port.linked { background: var(--color-accent-solid); color: #fff; }
.node-ports .port:hover { filter: brightness(1.05); }
.btn-link-default {
  display: block; width: 100%; margin-top: 0.15rem; padding: 0.25rem;
  border: 1px dashed var(--color-border-strong); background: transparent;
  border-radius: var(--radius-sm); font-size: 10px; cursor: pointer;
  color: var(--color-text-secondary); font-family: inherit;
}
.btn-link-default:hover { border-color: var(--color-accent-solid); color: var(--color-accent-solid); }
.builder-props { border-left: 1px solid var(--color-border); padding: 0.75rem; overflow-y: auto; }
.builder-toolbar { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
.tabs { display: flex; gap: 0.25rem; margin-bottom: 1rem; }
.tab {
  padding: 0.45rem 0.9rem; border-radius: var(--radius-md); border: none; background: transparent;
  color: var(--color-text-secondary); font: inherit; font-size: var(--text-sm); cursor: pointer; font-weight: 600;
}
.tab.active { background: var(--color-accent-muted); color: var(--color-accent-solid); }

.svg-edges { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; }
.svg-edges path { stroke: var(--color-accent-solid); stroke-width: 2; fill: none; opacity: 0.75; }
.svg-edges .edge-label {
  fill: var(--color-text-secondary); font-size: 10px; font-family: var(--font-sans);
}

@media (max-width: 960px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; flex-direction: row; flex-wrap: wrap; }
  .playground-layout { grid-template-columns: 1fr; }
  .builder {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 70vh;
  }
  .builder-canvas-wrap { min-height: 55vh; }
  .builder-props { max-height: 40vh; }
}