/* Server-served UI styles (mobile-first). */

:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.5;
  --bg: Canvas;
  --fg: CanvasText;
  --muted: color-mix(in oklab, var(--fg) 55%, transparent);
  --card: color-mix(in oklab, var(--fg) 6%, transparent);
  --border: color-mix(in oklab, var(--fg) 14%, transparent);
  --accent: #3b82f6;
  --danger: #ef4444;
}

body {
  margin: 0;
  padding: 16px;
  background: var(--bg);
  color: var(--fg);
}

/* Concept flash (concept card only) */
.conceptCard {
  position: relative;
  overflow: hidden;
}
.conceptFlashOverlay {
  position: absolute;
  inset: 0;
  background: #000;
  opacity: 0;
  pointer-events: none;
  z-index: 10;
}
.conceptFlashOverlay.isFlashing {
  animation: conceptFlash 260ms ease-out;
}
@keyframes conceptFlash {
  0% {
    opacity: 0;
  }
  8% {
    opacity: 1;
  }
  35% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .conceptFlashOverlay.isFlashing {
    animation: none;
  }
}

/* Strict black/white (scientific instrument feel) for login page */
.page-login {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #000000;
  --muted: #222222;
  --card: #ffffff;
  --border: #000000;
  --accent: #000000;
  --danger: #000000;
}

/* Extend the same scientific black/white instrument theme to the app shell */
.page-app {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #000000;
  --muted: #222222;
  --card: #ffffff;
  --border: #000000;
  --accent: #000000;
  --danger: #000000;
}

header,
main {
  max-width: 1100px;
  margin: 0 auto;
}

@media (min-width: 1100px) {
  header,
  main {
    max-width: 1680px;
  }
}

.appHeader {
  margin-bottom: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.appHeader__brand {
  margin-right: 6px;
}
.appHeader__meta {
  color: var(--muted);
}
.appHeader__actions a {
  text-decoration: underline;
}

.brand {
  font-size: 1.05rem;
  letter-spacing: 0.2px;
}
.brand--xl {
  font-size: 1.8rem;
  margin: 0 0 0.5rem 0;
}
.brand__focus {
  font-weight: 800;
  color: var(--fg);
}
.brand__rest {
  font-weight: 500;
  color: color-mix(in oklab, var(--fg) 70%, transparent);
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.page-login a {
  text-decoration: underline;
}

h2,
h3,
h4 {
  margin: 0.25rem 0;
}

.muted {
  color: var(--muted);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.row--space {
  justify-content: space-between;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card) 60%, transparent);
  padding: 8px 10px;
  border-radius: 10px;
  color: inherit;
  cursor: pointer;
}
.btn:hover {
  border-color: color-mix(in oklab, var(--border) 70%, var(--accent));
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.btn--small {
  padding: 6px 8px;
  border-radius: 9px;
  font-size: 0.92rem;
}
.btn--danger {
  border-color: color-mix(in oklab, var(--danger) 60%, var(--border));
}
.btn--danger:hover {
  border-color: color-mix(in oklab, var(--danger) 75%, var(--border));
}

.btn--primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--fg);
  border-color: var(--fg);
  color: var(--bg);
  text-decoration: none;
}
.btn--primary:hover {
  background: var(--bg);
  color: var(--fg);
  border-color: var(--fg);
  text-decoration: none;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.85rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.login {
  min-height: calc(100vh - 32px);
  display: grid;
  place-items: center;
}
.login__card {
  width: min(680px, 100%);
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 22px;
  background: var(--card);
}
.login__header {
  margin-bottom: 10px;
}
.login__subtitle {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.95rem;
}
.login__meta {
  margin: 16px 0 18px 0;
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.login__actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.login__notice {
  margin: 14px 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--fg) 2%, var(--bg));
  font-size: 0.95rem;
}
.login__notice--info {
  color: var(--muted);
}
.login__notice--error {
  color: var(--fg);
  background: color-mix(in oklab, var(--fg) 7%, var(--bg));
}
.login__foot {
  margin-top: 14px;
  color: var(--muted);
}

.page-app .card,
.page-app .listItem,
.page-app textarea {
  border-radius: 0;
}
.page-app .card {
  border-width: 2px;
}
.page-app .listItem {
  border-width: 2px;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}
.page-app .listItem:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--bg);
}
.page-app .listItem:hover .muted,
.page-app .listItem:hover .listItem__meta,
.page-app .listItem:hover .brand__rest {
  color: color-mix(in oklab, var(--bg) 78%, transparent);
}
.page-app .listItem:hover a {
  color: inherit;
}
.page-app .listItem:hover .pill {
  border-color: var(--bg);
}
.page-app .btn {
  border-radius: 0;
  background: var(--bg);
  color: var(--fg);
}
.page-app .btn:hover {
  background: var(--fg);
  color: var(--bg);
}
.page-app .btn--primary {
  background: var(--fg);
  color: var(--bg);
}
.page-app .btn--primary:hover {
  background: var(--bg);
  color: var(--fg);
}
.page-app .listItem__meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.page-app .pill {
  border-radius: 0;
}
.page-app .pill--draft,
.page-app .pill--complete {
  border-color: var(--border);
}

.instrument {
  padding: 16px;
}
.instrument__kicker {
  color: var(--muted);
}
.instrument__title {
  margin-top: 2px;
}
.instrument__meta {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.sessionCanvas {
  position: relative;
  border: 2px solid var(--border);
  min-height: 70vh;
  --grid: color-mix(in oklab, var(--fg) 10%, transparent);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 28px 28px;
  background-color: var(--bg);
  overflow: hidden;
}

.sessionNode {
  position: absolute;
  width: 320px;
  border: 2px solid var(--border);
  background: var(--bg);
  padding: 12px;
  cursor: grab;
  user-select: none;
  touch-action: none;
  box-shadow: 0 10px 22px color-mix(in oklab, var(--fg) 18%, transparent);
}
.sessionNode.isDragging {
  cursor: grabbing;
  box-shadow: 0 0 0 2px var(--fg);
}
.sessionNode__title {
  font-weight: 800;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sessionNode__title .sessionLabel__suffix {
  font-weight: 500;
}
.sessionNode__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}
.sessionNode__actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 14px;
  padding: 12px;
}
.error {
  border-color: color-mix(in oklab, var(--danger) 60%, var(--border));
}

.list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.listItem {
  display: block;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  background: var(--card);
}
.listItemRow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.listItemRow__main {
  flex: 1;
  min-width: 0;
}
.listItemRow__actions {
  flex: 0 0 auto;
}
.listItemLink {
  display: block;
  color: inherit;
}
.listItemLink:hover {
  text-decoration: none;
}
.listItem__title {
  font-weight: 700;
  margin-bottom: 4px;
}
.listItem__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.85rem;
}
.pill--draft {
  border-color: color-mix(in oklab, var(--accent) 35%, var(--border));
}
.pill--complete {
  border-color: color-mix(in oklab, #22c55e 45%, var(--border));
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.pane {
  min-width: 0;
}

.conceptLayout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  /* Equal-height panels with internal scrolling */
  height: calc(100vh - 120px);
}

.panel {
  border: 2px solid var(--border);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.panel__header {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}
.panel__kicker {
  color: var(--muted);
  margin-top: 6px;
}
.panel__title {
  margin: 6px 0 0 0;
}
.sessionLabel__suffix {
  font-weight: 500;
  color: color-mix(in oklab, var(--fg) 70%, transparent);
}
.threadLabel__suffix {
  font-weight: 500;
  color: color-mix(in oklab, var(--fg) 70%, transparent);
}
.panel__subtitle {
  color: var(--muted);
  margin-top: 6px;
  font-size: 0.9rem;
}

.panel__body {
  padding: 12px;
  min-height: 0;
  /* Slight instrument-gray background behind content elements */
  background: color-mix(in oklab, var(--fg) 4%, var(--bg));
  flex: 1;
}
.panel__scroll {
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.panel__chatBody {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
}

.chatLog {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 55vh;
  overflow: auto;
  padding: 6px 2px;
}
.chatLog--panel {
  margin-top: 0;
  max-height: none;
  flex: 1;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--border);
  --grid: color-mix(in oklab, var(--fg) 10%, transparent);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 28px 28px;
  background-color: var(--bg);
  position: relative;
}
.chatMsg {
  border: 1px solid var(--border);
  padding: 7px 10px;
  background: var(--bg);
  max-width: min(520px, 92%);
  width: fit-content;
  box-sizing: border-box;
  /* Preserve newlines, but avoid weird whitespace expansion */
  white-space: pre-line;
  word-break: break-word;
  border-radius: 18px;
  line-height: 1.25;
  box-shadow: 0 10px 22px color-mix(in oklab, var(--fg) 18%, transparent);
}
.chatMsg--user {
  align-self: flex-end;
  background: var(--bg);
  color: var(--fg);
  border-color: var(--border);
  border-bottom-right-radius: 6px;
}
.chatMsg--assistant {
  align-self: flex-start;
  background: color-mix(in oklab, var(--fg) 10%, var(--bg));
  color: var(--fg);
  border-color: var(--border);
  border-bottom-left-radius: 6px;
}

.chatForm {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chatForm--panel {
  margin-top: 0;
}
textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--border);
  padding: 10px;
  background: color-mix(in oklab, var(--card) 30%, transparent);
  color: inherit;
  resize: vertical;
}
.page-app .chatForm--panel textarea {
  background: var(--bg);
}

.chatThinkingOverlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  height: 22px;
  line-height: 22px;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--fg) 12%, var(--bg));
  color: var(--fg);
  text-align: center;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  font-size: 0.78rem;
  pointer-events: none;
}
.chatThinkingOverlay::after {
  content: "…";
  animation: thinkingDots 1.2s steps(4, end) infinite;
}
@keyframes thinkingDots {
  0% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.2;
  }
}

.refItem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: color-mix(in oklab, var(--card) 55%, transparent);
}

.md h2,
.md h3,
.md h4 {
  margin-top: 0.8rem;
}
.md p {
  margin: 0.5rem 0;
}
.md pre {
  overflow: auto;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card) 75%, transparent);
}

@media (min-width: 900px) {
  body {
    padding: 24px;
  }
  .layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
  .conceptLayout {
    grid-template-columns: 2.4fr 1fr;
    align-items: stretch;
    height: calc(100vh - 140px);
  }
}