:root {
  --bg: #f3efe6;
  --bg-accent: #e4dcc7;
  --panel: rgba(255, 252, 245, 0.82);
  --panel-border: rgba(63, 50, 29, 0.12);
  --text: #1f1d17;
  --muted: #5f584d;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --warning: #b45309;
  --line: rgba(31, 29, 23, 0.18);
  --shadow: 0 24px 60px rgba(52, 43, 24, 0.14);
  --desktop-panel-height: clamp(700px, calc(100dvh - 132px), 980px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Iowan Old Style", "Palatino Linotype", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(180, 83, 9, 0.14), transparent 24%),
    linear-gradient(145deg, var(--bg), #ede4d2 45%, var(--bg-accent));
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  max-width: 1600px;
  margin: 0 auto;
  padding: 28px;
}

.topbar,
.panel,
.card,
.node,
.suggestion-card,
.message {
  backdrop-filter: blur(12px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2,
h3,
p,
pre {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 3vw, 3.4rem);
  line-height: 0.96;
}

h2 {
  font-size: 1.3rem;
}

.mode-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.12);
  color: var(--accent-strong);
  font-size: 0.95rem;
}

.mode-pill.error {
  background: rgba(180, 83, 9, 0.12);
  color: var(--warning);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
}

.panel,
.card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.graph-panel,
.workspace-panel {
  padding: 18px;
  min-width: 0;
  height: var(--desktop-panel-height);
}

.workspace-panel {
  display: grid;
  gap: 16px;
  align-content: start;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

.graph-panel {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-header.compact {
  margin-bottom: 12px;
}

.graph-actions,
.chat-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.graph-tuning {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 240px));
  gap: 14px;
  margin-bottom: 14px;
}

.graph-slider {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(31, 29, 23, 0.08);
  background: rgba(255, 255, 255, 0.62);
}

.graph-slider span,
.graph-slider strong {
  font-size: 0.82rem;
  color: var(--muted);
}

.graph-slider strong {
  color: var(--accent-strong);
  font-weight: 700;
}

.graph-slider input[type="range"] {
  padding: 0;
  background: transparent;
}

.graph-tuning-actions {
  display: flex;
  align-items: stretch;
  gap: 10px;
}

.graph-tuning-actions .secondary-btn {
  flex: 1;
  min-height: 100%;
}

.settings-dock {
  position: sticky;
  top: 0;
  z-index: 20;
  justify-self: start;
}

.settings-toggle {
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 252, 245, 0.92);
  color: var(--accent-strong);
  box-shadow: 0 14px 34px rgba(52, 43, 24, 0.12);
}

.settings-toggle:hover {
  background: rgba(255, 252, 245, 0.98);
}

.settings-toggle.open {
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.14), rgba(17, 94, 89, 0.08));
}

.settings-popover {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: min(420px, calc(100vw - 56px));
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  background: rgba(255, 252, 245, 0.95);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(-10px) scale(0.98);
  transform-origin: top left;
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.settings-popover.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.graph {
  position: relative;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  border-radius: 20px;
  cursor: grab;
  touch-action: none;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.7), transparent 50%),
    linear-gradient(180deg, rgba(231, 220, 198, 0.4), rgba(243, 239, 230, 0.16));
}

.graph-focus {
  width: min(420px, 100%);
  margin: 0 auto 14px;
  padding: 14px 18px;
  border-radius: 20px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  background: linear-gradient(180deg, rgba(255, 252, 245, 0.96), rgba(245, 251, 249, 0.92));
  box-shadow: 0 14px 30px rgba(15, 118, 110, 0.08);
  text-align: center;
}

.graph-focus.empty {
  color: var(--muted);
}

.graph-focus h3 {
  margin: 0 0 6px;
  font-size: 1.08rem;
}

.graph-focus p {
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--muted);
}

.node-detail-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(31, 29, 23, 0.22);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
  z-index: 40;
}

.node-detail-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.node-detail-modal {
  width: min(820px, 100%);
  max-height: min(78vh, 920px);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  gap: 12px;
  padding: 22px;
  border-radius: 24px;
  border: 1px solid rgba(31, 29, 23, 0.08);
  background: rgba(255, 252, 245, 0.98);
  box-shadow: 0 30px 70px rgba(31, 29, 23, 0.18);
  transform: translateY(12px) scale(0.98);
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.node-detail-overlay.open .node-detail-modal {
  transform: translateY(0) scale(1);
}

.node-detail-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.node-detail-meta {
  min-height: 1.2rem;
}

.node-detail-question {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.node-detail-body {
  overflow-y: auto;
  padding-right: 6px;
  min-width: 0;
}

.node-detail-thread {
  display: grid;
  gap: 12px;
}

.node-detail-thread .message {
  margin: 0;
}

.node-detail-body > :first-child {
  margin-top: 0;
}

.node-detail-body > :last-child {
  margin-bottom: 0;
}

.node-detail-form {
  display: grid;
  gap: 10px;
  padding-top: 6px;
  border-top: 1px solid rgba(31, 29, 23, 0.08);
}

.node-detail-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.graph.dragging {
  cursor: grabbing;
}

.graph::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 29, 23, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 29, 23, 0.04) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.edge-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.edge-line {
  stroke-width: 2;
  fill: none;
}

.edge-line.dialogue-flow {
  stroke: rgba(15, 118, 110, 0.72);
}

.edge-line.knowledge-link {
  stroke: rgba(180, 83, 9, 0.88);
  stroke-dasharray: 10 8;
  stroke-width: 2.5;
}

.edge-line.preview-link {
  stroke-dasharray: 10 8;
}

.edge-arrow {
  pointer-events: none;
}

.dialogue-flow-arrow {
  fill: rgba(15, 118, 110, 0.78);
}

.node {
  position: absolute;
  z-index: 2;
  width: 190px;
  transform: translate(-50%, -50%);
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(31, 29, 23, 0.08);
  background: rgba(255, 251, 241, 0.86);
  box-shadow: 0 10px 26px rgba(31, 29, 23, 0.08);
  cursor: pointer;
  transition:
    box-shadow 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.node:hover,
.node:focus-visible {
  border-color: rgba(15, 118, 110, 0.34);
  box-shadow: 0 16px 30px rgba(15, 118, 110, 0.12);
  background: rgba(255, 251, 241, 0.95);
  outline: none;
}

.node.primary-node {
  width: 220px;
  border-color: rgba(15, 118, 110, 0.28);
  background: linear-gradient(180deg, rgba(255, 252, 245, 0.98), rgba(245, 251, 249, 0.96));
  box-shadow: 0 18px 34px rgba(15, 118, 110, 0.12);
}

.node.primary-node h3 {
  font-size: 1.04rem;
}

.node.highlighted {
  border-color: rgba(180, 83, 9, 0.42);
  box-shadow: 0 18px 34px rgba(180, 83, 9, 0.18);
}

.node.selected {
  border-color: rgba(15, 118, 110, 0.42);
  box-shadow: 0 20px 38px rgba(15, 118, 110, 0.16);
  background: rgba(255, 252, 245, 0.98);
}

.ghost-node {
  width: 128px;
  padding: 10px 11px;
  opacity: 0.2;
  border-style: dashed;
  border-color: rgba(15, 118, 110, 0.18);
  background: rgba(255, 255, 255, 0.22);
  box-shadow: 0 6px 14px rgba(31, 29, 23, 0.04);
  cursor: default;
}

.ghost-node h3,
.ghost-node p {
  color: rgba(31, 29, 23, 0.72);
}

.ghost-node h3 {
  margin-bottom: 4px;
  font-size: 0.82rem;
}

.ghost-node p {
  font-size: 0.74rem;
  line-height: 1.3;
}

.node h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.node p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.4;
}

.tag-row {
  display: none;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.tag {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--accent-strong);
  font-size: 0.76rem;
}

.card {
  padding: 18px;
  min-width: 0;
}

.settings-form,
.chat-form {
  display: grid;
  gap: 14px;
}

.chat-context {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(15, 118, 110, 0.08);
  border: 1px solid rgba(15, 118, 110, 0.14);
}

.chat-context.hidden {
  display: none;
}

.chat-context-label {
  min-width: 0;
  color: var(--accent-strong);
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.settings-form label {
  display: grid;
  gap: 8px;
}

.settings-form span {
  color: var(--muted);
  font-size: 0.95rem;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(31, 29, 23, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  padding: 12px 14px;
  color: var(--text);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(15, 118, 110, 0.25);
  border-color: rgba(15, 118, 110, 0.36);
}

.primary-btn,
.secondary-btn,
.accept-btn {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  cursor: pointer;
}

.primary-btn,
.accept-btn {
  color: white;
  background: linear-gradient(135deg, var(--accent), #134e4a);
}

.secondary-btn {
  background: rgba(31, 29, 23, 0.08);
  color: var(--text);
}

.secondary-btn:disabled,
.primary-btn:disabled,
.accept-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.chat-card {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 520px;
}

.chat-log {
  display: grid;
  gap: 10px;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  min-width: 0;
}

.chat-form {
  align-self: end;
}

#chat-input {
  min-height: 112px;
  resize: vertical;
}

.message {
  padding: 12px 14px;
  border-radius: 16px;
  line-height: 1.5;
  border: 1px solid rgba(31, 29, 23, 0.08);
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.message-body > :first-child {
  margin-top: 0;
}

.message-body > :last-child {
  margin-bottom: 0;
}

.message-body p,
.message-body ul,
.message-body ol,
.message-body pre,
.message-body blockquote,
.message-body h1,
.message-body h2,
.message-body h3,
.message-body h4,
.message-body h5,
.message-body h6 {
  margin: 0 0 10px;
}

.message-body h1,
.message-body h2,
.message-body h3,
.message-body h4,
.message-body h5,
.message-body h6 {
  line-height: 1.3;
}

.message-body h1 {
  font-size: 1.16rem;
}

.message-body h2 {
  font-size: 1.08rem;
}

.message-body h3 {
  font-size: 1rem;
}

.message-body ul,
.message-body ol {
  padding-left: 1.3rem;
}

.message-body li + li {
  margin-top: 4px;
}

.message-body code {
  padding: 0.14rem 0.34rem;
  border-radius: 8px;
  background: rgba(31, 29, 23, 0.08);
  font-size: 0.9em;
}

.message-body pre {
  overflow-x: auto;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(31, 29, 23, 0.9);
  color: rgba(255, 252, 245, 0.96);
}

.message-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.message-body blockquote {
  padding-left: 12px;
  border-left: 3px solid rgba(15, 118, 110, 0.35);
  color: rgba(31, 29, 23, 0.82);
}

.message-body a {
  color: var(--accent-strong);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}

.message-body .math-inline,
.message-body .math-block {
  white-space: normal;
}

.message-body .math-block {
  display: block;
  overflow-x: auto;
  padding: 8px 0;
}

.message-body mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.message.user {
  background: rgba(15, 118, 110, 0.1);
}

.message.assistant {
  background: rgba(255, 255, 255, 0.72);
}

.message.system {
  background: rgba(31, 29, 23, 0.06);
}

.message-role {
  display: block;
  margin-bottom: 6px;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-text {
  color: var(--muted);
  font-size: 0.92rem;
  min-width: 0;
  overflow-wrap: anywhere;
}

.chat-progress {
  position: relative;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(31, 29, 23, 0.08);
  opacity: 0;
  transform: translateY(-4px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.chat-progress.visible {
  opacity: 1;
  transform: translateY(0);
}

.chat-progress-bar {
  position: absolute;
  inset: 0 auto 0 -38%;
  width: 38%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.18), rgba(15, 118, 110, 0.88), rgba(180, 83, 9, 0.52));
  animation: chat-progress-slide 1.15s ease-in-out infinite;
}

@keyframes chat-progress-slide {
  0% {
    left: -38%;
  }
  100% {
    left: 100%;
  }
}

.suggestion-card {
  min-height: 220px;
  display: grid;
  gap: 12px;
}

.suggestion-card.empty {
  color: var(--muted);
  place-items: center;
}

.debug-card {
  gap: 12px;
}

.debug-panel {
  display: grid;
  gap: 12px;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transform: translateY(-6px);
  transition:
    max-height 220ms ease,
    opacity 180ms ease,
    transform 220ms ease;
}

.debug-panel.open {
  max-height: 420px;
  opacity: 1;
  transform: translateY(0);
}

.debug-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.debug-pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
  font-size: 0.8rem;
}

.metric-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.metric {
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(180, 83, 9, 0.1);
  color: var(--warning);
  font-size: 0.88rem;
}

.suggestion-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.debug-preview {
  max-height: 260px;
  overflow: auto;
  padding: 14px;
  border-radius: 16px;
  background: rgba(31, 29, 23, 0.06);
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .workspace-panel {
    height: auto;
  }

  .graph-panel {
    height: auto;
  }

  .graph {
    height: auto;
    min-height: 560px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 16px;
  }

  .panel-header,
  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .node {
    width: 156px;
  }

  .graph-actions,
  .chat-actions {
    width: 100%;
  }

  .graph-tuning {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .graph-tuning-actions {
    flex-direction: column;
  }

  .settings-dock {
    justify-self: stretch;
  }

  .settings-popover {
    width: min(100%, calc(100vw - 32px));
  }
}