/* Research kit: Terminal (CoT) + MessageBoard (.rk-terminal*, .rk-board*).
 * TUI-style terminal chrome: title bar model id, ChatGPT mark, dense mono body.
 * Scoped under .research-article. Kit CSS should load after article styles.css.
 */

/* ============================================================
   TERMINAL / CHAIN-OF-THOUGHT (TUI)
   ============================================================ */

.research-article .rk-terminal,
.research-article div.rk-terminal {
  --rk-term-bg: #0b0f14;
  --rk-term-panel: #11171f;
  --rk-term-line: #1a2330;
  --rk-term-fg: #d7e0ea;
  --rk-term-dim: #7d8b9a;
  --rk-term-mute: #5a6775;
  --rk-term-prompt: #3dd6c6;
  --rk-term-accent: #2d6ae7;
  position: relative;
  background: var(--rk-term-bg);
  border: 1px solid color-mix(in srgb, var(--rk-term-line) 85%, #000);
  border-radius: 10px;
  padding: 0;
  margin-block: var(--space-8);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.35),
    0 18px 40px -24px rgba(0, 0, 0, 0.75),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  font-variant-ligatures: none;
}

/* Title bar: lights · logo + model id · monologue badge */
.research-article .rk-terminal-chrome {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem 0.75rem;
  padding: 0.5rem 0.75rem;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--rk-term-panel) 92%, #fff) 0%,
      var(--rk-term-panel) 100%
    );
  border-bottom: 1px solid var(--rk-term-line);
  min-height: 2.25rem;
}

.research-article .rk-terminal-chrome .lights,
.research-article .rk-board-chrome .lights {
  display: flex;
  gap: 6px;
  flex: none;
  align-items: center;
}

.research-article .rk-terminal-chrome .lights i,
.research-article .rk-board-chrome .lights i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: block;
  background: var(--rk-term-line);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.25);
}

.research-article .rk-terminal-chrome .lights i:nth-child(1),
.research-article .rk-board-chrome .lights i:nth-child(1) {
  background: #ff5f57;
}
.research-article .rk-terminal-chrome .lights i:nth-child(2),
.research-article .rk-board-chrome .lights i:nth-child(2) {
  background: #febc2e;
}
.research-article .rk-terminal-chrome .lights i:nth-child(3),
.research-article .rk-board-chrome .lights i:nth-child(3) {
  background: #28c840;
}

/* Model title cluster (single ChatGPT logo + codex-sol-5.6) */
.research-article .rk-terminal-title,
.research-article .rk-terminal-identity-main {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  justify-self: start;
}

.research-article .rk-terminal-logo {
  width: 16px;
  height: 16px;
  object-fit: contain;
  flex: none;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.research-article .rk-terminal-model {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--rk-term-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-feature-settings: "tnum" 1;
}

/* Legacy identity row (if present): collapse into chrome-like strip */
.research-article .rk-terminal-identity {
  display: none;
}

.research-article .rk-terminal-monologue-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--rk-term-mute);
  white-space: nowrap;
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--rk-term-line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--rk-term-bg) 70%, transparent);
}

/* Status / scene line under title bar */
.research-article .rk-terminal-scene,
.research-article .rk-terminal-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--rk-term-dim);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0.4rem 0.9rem;
  background: color-mix(in srgb, var(--rk-term-panel) 55%, var(--rk-term-bg));
  border-bottom: 1px solid color-mix(in srgb, var(--rk-term-line) 70%, transparent);
}

.research-article .rk-terminal-scene::before,
.research-article .rk-terminal-label::before {
  content: "//";
  color: var(--rk-term-mute);
  flex: none;
}

.research-article .rk-terminal-label svg {
  display: none;
}

/* Body: dense TUI monologue */
.research-article .rk-terminal-body {
  padding: 0.85rem 0.95rem 1rem;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--rk-term-bg) 92%, #1a2a22) 0%,
      var(--rk-term-bg) 28%
    );
}

.research-article .rk-terminal p,
.research-article .rk-terminal .rk-terminal-line {
  font-family: var(--font-mono);
  font-size: clamp(0.875rem, 0.82rem + 0.25vw, 0.975rem);
  line-height: 1.65;
  color: var(--rk-term-fg);
  margin: 0;
  word-break: break-word;
  position: relative;
}

.research-article .rk-terminal p + p,
.research-article .rk-terminal .rk-terminal-line + .rk-terminal-line {
  margin-top: 0.45rem;
}

/* Quote lines read as agent stdout with a prompt gutter */
.research-article .rk-terminal .rk-terminal-line--quote {
  color: var(--rk-term-prompt);
  padding-left: 1.1rem;
}

.research-article .rk-terminal .rk-terminal-line--quote::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--rk-term-mute);
  font-weight: 600;
}

.research-article .rk-terminal .quiet,
.research-article .rk-terminal .rk-terminal-line--quiet {
  color: var(--rk-term-mute);
  font-size: 0.6875rem;
  letter-spacing: 0.03em;
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px dashed color-mix(in srgb, var(--rk-term-line) 80%, transparent);
}

.research-article .rk-terminal .rk-terminal-line strong,
.research-article .rk-terminal p strong {
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Non-quote body lines (board posts, raw strings) */
.research-article .rk-terminal .rk-terminal-line:not(.rk-terminal-line--quote):not(.rk-terminal-line--quiet) {
  color: #b8c4d0;
}

.research-article .rk-terminal-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ============================================================
   MESSAGE BOARD RECONSTRUCTION
   ============================================================ */

.research-article .rk-board,
.research-article div.rk-board {
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--color-attacker) 8%, transparent),
    0 16px 36px -22px rgba(0, 0, 0, 0.6);
}

.research-article .rk-board-chrome {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border-soft);
  min-width: 0;
}

.research-article .rk-board-chrome code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  background: none;
  border: none;
  padding: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.research-article .rk-board-list {
  padding: var(--space-2) 0;
  overflow-x: auto;
}

/* Protocol log row: gutter | kind rail + meta + path + gloss */
.research-article .rk-board-row {
  --rk-board-kind: var(--color-agent);
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0 var(--space-2);
  align-items: start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-3) var(--space-4);
  border: 0;
  border-left: 2px solid var(--rk-board-kind);
  border-radius: 0;
  background: transparent;
  transition: background 120ms var(--ease, ease);
}

.research-article .rk-board-row + .rk-board-row {
  margin-top: 0;
  border-top: 1px solid color-mix(in srgb, var(--color-border-soft) 80%, transparent);
}

/* Soft highlight only — no border that reads as a button */
.research-article .rk-board-row:hover {
  background: color-mix(in srgb, var(--color-surface) 55%, transparent);
  border-color: var(--rk-board-kind);
}

.research-article .rk-board-gutter {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  line-height: 1.6;
  color: var(--color-text-faint);
  text-align: right;
  padding-top: 0.15em;
  user-select: none;
}

.research-article .rk-board-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.research-article .rk-board-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.55rem;
  margin-bottom: 0.1rem;
}

.research-article .rk-board-kind {
  display: inline-block;
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  padding: 0.22em 0.45em;
  border-radius: 2px;
  color: var(--rk-board-kind);
  background: color-mix(in srgb, var(--rk-board-kind) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--rk-board-kind) 32%, transparent);
}

.research-article .rk-board-agent {
  font-size: 0.6875rem;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.research-article .rk-board-ts {
  font-size: 0.625rem;
  color: var(--color-text-faint);
}

.research-article .rk-board-ts::before {
  content: "·";
  margin-right: 0.45rem;
  color: var(--color-text-faint);
}

.research-article .rk-board-name {
  color: var(--rk-board-kind);
  word-break: break-all;
  font-size: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  line-height: 1.45;
}

.research-article .rk-board-name b {
  color: var(--color-text);
  font-weight: 500;
}

.research-article .rk-board-gloss {
  color: var(--color-text-faint);
  font-size: 0.6875rem;
  line-height: 1.55;
  padding-left: 0.15rem;
  border-left: 1px solid color-mix(in srgb, var(--color-border-soft) 90%, transparent);
  margin-left: 0.1rem;
  padding-left: 0.65rem;
  max-width: 72ch;
}

.research-article .rk-board-gloss code {
  font-family: var(--font-mono);
  font-size: inherit;
  color: var(--color-text-muted);
  background: color-mix(in srgb, var(--color-surface-3) 80%, transparent);
  border: 1px solid var(--color-border-soft);
  border-radius: 2px;
  padding: 0 0.25em;
}

.research-article .rk-board-row[data-kind="seek"] {
  --rk-board-kind: var(--color-agent);
}
.research-article .rk-board-row[data-kind="assign"] {
  --rk-board-kind: var(--color-ext);
}
.research-article .rk-board-row[data-kind="exploit"] {
  --rk-board-kind: var(--color-attacker);
}
.research-article .rk-board-row[data-kind="sign"] {
  --rk-board-kind: var(--color-gold);
}
.research-article .rk-board-row[data-kind="conflict"] {
  --rk-board-kind: var(--color-danger);
}

.research-article .rk-board-head {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.research-article .rk-board-caption,
.research-article p.rk-board-caption {
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-border-soft);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.6;
  font-family: var(--font-mono);
}

.research-article .legend,
.research-article .rk-board-legend {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  margin-top: var(--space-8);
}

.research-article .legend-item,
.research-article .rk-board-legend-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-surface);
}

.research-article .legend-item h5,
.research-article .rk-board-legend-item h5 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

.research-article .legend-item p,
.research-article .rk-board-legend-item p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Light theme: keep TUI dark (terminals stay dark surfaces) */
@media (prefers-color-scheme: light) {
  .research-article .rk-terminal,
  .research-article div.rk-terminal {
    box-shadow:
      0 0 0 1px rgba(15, 23, 42, 0.08),
      0 14px 32px -20px rgba(15, 23, 42, 0.28);
  }

  .research-article .rk-board,
  .research-article div.rk-board {
    box-shadow:
      0 0 0 1px color-mix(in srgb, var(--color-attacker) 6%, transparent),
      0 12px 28px -18px rgba(15, 23, 42, 0.14);
  }
}

@media (max-width: 480px) {
  .research-article .rk-terminal-chrome {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .research-article .rk-terminal-monologue-label {
    grid-column: 1 / -1;
    justify-self: start;
  }

  .research-article .rk-board-chrome code {
    white-space: normal;
  }

  .research-article .rk-board-row {
    grid-template-columns: 1.5rem minmax(0, 1fr);
    padding: var(--space-3);
  }

  .research-article .rk-board-gutter {
    font-size: 0.5625rem;
  }
}