/* aRCADA Chat UI — light/dark theme drawing on OOI RCA visual identity */

:root {
  /* Light theme (default) */
  --bg:          #f5f7fb;
  --bg-panel:    #ffffff;
  --bg-card:     #edf1f8;
  --bg-input:    #ffffff;
  --border:      rgba(0, 85, 204, 0.25);
  --border-soft: rgba(0, 85, 204, 0.13);

  --accent:      #0055cc;
  --accent-dim:  #003da5;
  --accent-glow: rgba(0, 85, 204, 0.08);
  --teal:        #0055cc;
  --teal-dim:    rgba(0, 85, 204, 0.12);
  --teal-glow:   rgba(0, 85, 204, 0.06);
  --teal-border: rgba(0, 85, 204, 0.18);

  --text:        #0a1a3a;
  --text-muted:  #4a6090;
  --text-faint:  #8aabcf;

  --success:     #1b5e20;
  --success-bg:  rgba(27, 94, 32, 0.08);
  --error:       #c62828;
  --error-bg:    rgba(198, 40, 40, 0.08);

  --header-bg:       rgba(245, 247, 251, 0.92);
  --badge-ooi-text:  #0055cc;
  --badge-pi-text:   #8a4000;
  --badge-pi-bg:     rgba(140, 70, 0, 0.10);
  --error-text:      #b71c1c;
  --code-bg:         rgba(0, 0, 0, 0.05);
  --overlay-bg:      rgba(20, 40, 80, 0.50);
  --gate-bg:         rgba(245, 247, 251, 0.97);
  --paper-hover:     rgba(0, 85, 204, 0.04);

  --radius:      6px;
  --radius-lg:   12px;
  --font-mono:   "DM Mono", "Fira Mono", monospace;
  --font-ui:     "Syne", "Inter", system-ui, sans-serif;
  --font-body:   "Inter", system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg:          #050d1a;
  --bg-panel:    #0a1628;
  --bg-card:     #0e1e35;
  --bg-input:    #0c1a2e;
  --border:      #1a3054;
  --border-soft: #122540;

  --accent:      #0066cc;
  --accent-dim:  #003da5;
  --accent-glow: rgba(0, 102, 204, 0.18);
  --teal:        #00b4d8;
  --teal-dim:    rgba(0, 180, 216, 0.12);
  --teal-glow:   rgba(0, 180, 216, 0.06);
  --teal-border: rgba(0, 180, 216, 0.15);

  --text:        #dce8f8;
  --text-muted:  #6a8db5;
  --text-faint:  #3a5878;

  --success:     #2e7d32;
  --success-bg:  rgba(46, 125, 50, 0.12);
  --error:       #c62828;
  --error-bg:    rgba(198, 40, 40, 0.10);

  --header-bg:       rgba(5, 13, 26, 0.92);
  --badge-ooi-text:  #6ab4ff;
  --badge-pi-text:   #ffb74d;
  --badge-pi-bg:     rgba(255, 165, 0, 0.12);
  --error-text:      #ef9a9a;
  --code-bg:         rgba(0, 0, 0, 0.35);
  --overlay-bg:      rgba(0, 0, 0, 0.70);
  --gate-bg:         rgba(5, 13, 26, 0.96);
  --paper-hover:     rgba(0, 180, 216, 0.05);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ──────────────────────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-link { text-decoration: none; font-family: var(--font-ui); font-weight: 800; font-size: 1.25rem; letter-spacing: -0.01em; }
.logo-arc   { color: var(--teal); }
.logo-rcada { color: var(--text); }

.header-nav { display: flex; gap: 2rem; }
.header-nav a { color: var(--text-muted); text-decoration: none; font-size: 0.72rem; font-family: var(--font-mono); font-weight: 400; letter-spacing: 0.12em; text-transform: uppercase; transition: color 0.2s; }
.header-nav a:hover { color: var(--teal); }
.header-nav a.active { color: var(--text); }

/* ── Layout ──────────────────────────────────────────────────────── */
.chat-main {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 1fr;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  align-items: start;
  gap: 1.5rem;
}

/* ── Context Panel ───────────────────────────────────────────────── */
.context-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
}

/* ── Inline code card (rendered inside chat bubbles) ─────────────── */
.code-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 0.5rem;
  position: relative;
}
.code-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.code-card-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-soft);
}
.code-card-dots { display: flex; gap: 0.3rem; }
.code-card-dots .term-dot { width: 7px; height: 7px; border-radius: 50%; }
.code-card-dots .term-dot:nth-child(1) { background: #ff5f57; opacity: 0.7; }
.code-card-dots .term-dot:nth-child(2) { background: #febc2e; opacity: 0.7; }
.code-card-dots .term-dot:nth-child(3) { background: #28c840; opacity: 0.7; }
.code-card-filename {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--text-muted);
  flex: 1;
  letter-spacing: 0.05em;
}
.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: 1px solid var(--border-soft);
  border-radius: 3px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  padding: 0.18rem 0.45rem;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.code-copy-btn:hover { color: var(--text); border-color: var(--accent); background: var(--accent-glow); }
.code-card-pre {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-input);
  padding: 0.85rem 0.9rem;
  overflow-x: auto;
  white-space: pre;
  max-height: 420px;
  overflow-y: auto;
}
.code-card-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border-soft);
}
.code-download-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.65rem;
  text-decoration: none;
  transition: background 0.15s;
  flex-shrink: 0;
}
.code-download-btn:hover { background: var(--accent-dim); }
.code-size-hint {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* kept for old script-panel DOM references that may linger */
.script-block {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 0.75rem;
  position: relative;
}

.script-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.script-terminal-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.75rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-soft);
}

.script-terminal-header .term-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
}
.script-terminal-header .term-dot:nth-child(1) { background: #ff5f57; opacity: 0.7; }
.script-terminal-header .term-dot:nth-child(2) { background: #febc2e; opacity: 0.7; }
.script-terminal-header .term-dot:nth-child(3) { background: #28c840; opacity: 0.7; }

.script-terminal-label {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--text-muted);
  margin-left: auto;
  letter-spacing: 0.05em;
}

.script-pre {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-input);
  padding: 0.85rem 0.9rem;
  overflow-x: auto;
  white-space: pre;
  max-height: 360px;
  overflow-y: auto;
}

/* Syntax token colours */
.script-pre .tok-comment { color: var(--text-faint); font-style: italic; }
.script-pre .tok-keyword { color: var(--accent); }
.script-pre .tok-string  { color: #2e7d32; }
[data-theme="dark"] .script-pre .tok-string { color: #81c784; }
.script-pre .tok-func    { color: var(--teal); }
.script-pre .tok-number  { color: #8a4000; }
[data-theme="dark"] .script-pre .tok-number { color: #ffb74d; }

.script-download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 0.15s, opacity 0.15s;
}
.script-download-btn:hover { background: var(--accent-dim); }

.script-size-hint {
  margin: 0.4rem 0 0;
  font-size: 0.65rem;
  color: var(--text3);
  text-align: center;
  font-family: var(--font-mono);
}

.panel-title {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.panel-hint {
  font-size: 0.8rem;
  color: var(--text-faint);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.panel-divider {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 1rem 0;
}

.example-list { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.example-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.5rem 0.65rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: var(--font-body);
  cursor: pointer;
  line-height: 1.45;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.example-btn:hover { border-color: var(--accent); color: var(--text); background: var(--accent-glow); }

/* ── Instrument cards in panel ───────────────────────────────────── */
#instrumentList { display: flex; flex-direction: column; gap: 0.5rem; }

.instrument-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
  font-size: 0.78rem;
  line-height: 1.45;
  text-decoration: none;
  display: block;
  transition: border-color 0.15s, background 0.15s;
}
a.instrument-card:hover { border-color: var(--accent); background: var(--accent-glow); cursor: pointer; }
.instrument-card.primary   { border-color: var(--accent); background: var(--accent-glow); }
.instrument-card.secondary { border-color: var(--border-soft); background: var(--bg-card); }

.instrument-card-name { font-weight: 600; color: var(--text); margin-bottom: 0.2rem; }
.instrument-card-meta { color: var(--text-muted); font-size: 0.72rem; font-family: var(--font-mono); }
.instrument-card-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  margin-top: 0.3rem;
}
.badge-ooi_api    { background: var(--accent-glow); color: var(--badge-ooi-text); }
.badge-earthscope { background: rgba(0, 180, 216, 0.15); color: var(--teal); }
.badge-pi_html    { background: var(--badge-pi-bg); color: var(--badge-pi-text); }

/* ── Paper cards in panel ────────────────────────────────────────── */
#paperList { display: flex; flex-direction: column; gap: 0.5rem; }

.paper-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
  font-size: 0.78rem;
  line-height: 1.45;
  background: var(--bg-card);
  text-decoration: none;
  display: block;
  transition: border-color 0.15s, background 0.15s;
}
a.paper-card:hover { border-color: var(--teal); background: var(--paper-hover); cursor: pointer; }

.paper-card-title {
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.35rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.paper-card-citation {
  display: inline-block;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ── Chat section ────────────────────────────────────────────────── */
.chat-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.chat-header { margin-bottom: 0.25rem; }
.chat-title   { font-family: var(--font-ui); font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; color: var(--text); }
.chat-subtitle { margin-top: 0.4rem; color: var(--text-muted); font-size: 0.88rem; line-height: 1.55; max-width: 640px; }

/* ── Message list ────────────────────────────────────────────────── */
.message-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 100px;
}

.message {
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  max-width: 100%;
}
.message.user {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  align-self: flex-end;
  max-width: 80%;
  color: var(--text);
  font-style: italic;
}
.message.assistant {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text);
}
.message.error {
  background: var(--error-bg);
  border: 1px solid var(--error);
  color: var(--error-text);
}

.message-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: 0.4rem;
}

.message pre {
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 0.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
}

/* ── Status bar ──────────────────────────────────────────────────── */
.status-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.status-bar[hidden] { display: none; }

.status-spinner {
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Input form ──────────────────────────────────────────────────── */
.input-form { display: flex; flex-direction: column; gap: 0.5rem; }

.input-row { display: flex; gap: 0.5rem; align-items: flex-end; }

.query-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.55;
  padding: 0.75rem 1rem;
  resize: vertical;
  min-height: 72px;
  transition: border-color 0.15s;
}
.query-input::placeholder { color: var(--text-faint); }
.query-input:focus { outline: none; border-color: var(--accent); }

.submit-btn {
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  transition: background 0.15s, transform 0.1s;
}
.submit-btn:hover  { background: var(--accent-dim); }
.submit-btn:active { transform: scale(0.96); }
.submit-btn:disabled { opacity: 0.4; cursor: not-allowed; }
[data-theme="dark"] .submit-btn { background: var(--teal); color: var(--bg); }
[data-theme="dark"] .submit-btn:hover { background: #0097b8; }

.input-note { font-size: 0.72rem; color: var(--text-faint); line-height: 1.5; }

/* ── Modal ───────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: var(--overlay-bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 500;
  backdrop-filter: blur(4px);
}
.modal-overlay[hidden] { display: none; }

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 520px;
  width: 90%;
}
.modal-title { font-family: var(--font-ui); font-size: 1.2rem; font-weight: 700; margin-bottom: 1rem; }
.modal-body { font-size: 0.85rem; line-height: 1.6; color: var(--text-muted); margin-bottom: 1.5rem; }
.modal-body strong { color: var(--text); }
.modal-body code { font-family: var(--font-mono); font-size: 0.8rem; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 3px; }

.modal-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1.2rem;
  font-size: 0.88rem;
  font-family: var(--font-ui);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--accent-dim); }
.btn-secondary {
  background: none;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 1.2rem;
  font-size: 0.88rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.btn-secondary:hover { color: var(--text); border-color: var(--text-muted); }

/* ── Password gate ───────────────────────────────────────────────── */
.password-gate {
  position: fixed; inset: 0;
  background: var(--gate-bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 600;
  backdrop-filter: blur(6px);
}
.password-gate[hidden] { display: none; }

.password-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 380px;
  width: 90%;
}
.password-card-title {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.password-card-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}
.password-row { display: flex; gap: 0.5rem; }
.password-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 0.6rem 0.9rem;
  outline: none;
  transition: border-color 0.15s;
}
.password-input:focus { border-color: var(--accent); }
.password-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s;
}
.password-submit:hover { background: var(--accent-dim); }
.password-error {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--error-text);
}
.password-error[hidden] { display: none; }

/* ── Typing indicator ────────────────────────────────────────────── */
.typing-dots span {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
  margin: 0 2px;
  animation: typingBounce 1.2s ease-in-out infinite;
  vertical-align: middle;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.5; }
  40%           { transform: translateY(-5px); opacity: 1; }
}

/* ── Message content: markdown elements ──────────────────────────── */
.message-content p   { margin: 0 0 0.6em; line-height: 1.65; }
.message-content p:last-child { margin-bottom: 0; }
.message-content h2  { font-family: var(--font-ui); font-size: 1rem; font-weight: 700; color: var(--text); margin: 0.75em 0 0.35em; }
.message-content h3  { font-family: var(--font-ui); font-size: 0.9rem; font-weight: 700; color: var(--text); margin: 0.65em 0 0.3em; }
.message-content h4  { font-family: var(--font-ui); font-size: 0.82rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin: 0.6em 0 0.25em; }
.message-content ul, .message-content ol { margin: 0.4em 0 0.6em 1.2em; }
.message-content li  { margin-bottom: 0.2em; line-height: 1.55; }
.message-content strong { color: var(--text); font-weight: 600; }
.message-content em  { color: var(--text-muted); font-style: italic; }
.message-content code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  color: var(--teal);
}
.message-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin: 0.5em 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
}
.message-content pre code { background: none; padding: 0; color: var(--text); font-size: inherit; }

/* ── Thinking indicator ──────────────────────────────────────────── */
.thinking-indicator {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 0.15rem;
}
.thinking-dots::after {
  content: '';
  animation: thinking-pulse 1.2s steps(4, end) infinite;
}
@keyframes thinking-pulse {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
  100% { content: ''; }
}

/* ── Data plan card ──────────────────────────────────────────────── */
.data-plan-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.plan-card-label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
}
.plan-summary {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.55;
  margin: 0;
}
.plan-time {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--teal-glow);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius);
}
.plan-time-dates {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--teal);
  font-weight: 500;
}
.plan-time-notes {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}
.plan-instruments-list { display: flex; flex-direction: column; gap: 0.5rem; }
.plan-instrument {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
}
.plan-primary-instr { border-color: var(--accent); background: var(--accent-glow); }
.plan-instr-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}
.plan-instr-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}
.plan-data-table { display: flex; flex-direction: column; }
.plan-data-table .data-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.75rem;
}
.plan-data-table .data-row:last-child { border-bottom: none; }
.plan-data-table .data-key { color: var(--text-muted); min-width: 80px; }
.plan-data-table .data-val { color: var(--teal); }
.plan-rationale {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border-soft);
}

/* ── Related papers (post-delivery) ──────────────────────────────── */
.related-papers-block { display: flex; flex-direction: column; gap: 0.65rem; }
.related-papers-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.5;
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 0.5rem;
}
.related-papers-list { display: flex; flex-direction: column; gap: 0.6rem; }
.related-paper-item {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
}
.related-paper-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.25rem;
}
.related-paper-byline {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}
.related-paper-doi { color: var(--text-faint); }
.paper-doi-link { color: var(--teal); text-decoration: none; }
.paper-doi-link:hover { text-decoration: underline; }

/* ── Theme toggle ────────────────────────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); background: var(--accent-glow); }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .chat-main { grid-template-columns: 1fr; padding: 1rem; }
  .context-panel { position: static; max-height: none; }
}

/* ── Mode bar ─────────────────────────────────────────────────────────────── */
.mode-bar {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 0 0.25rem;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 0.75rem;
}
.mode-btn {
  padding: 0.3rem 0.9rem;
  border-radius: 99px;
  border: 1px solid var(--border-soft);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s;
}
.mode-btn:hover { color: var(--teal); border-color: var(--teal); }
.mode-btn.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

/* ── Script download card ─────────────────────────────────────────────────── */
.script-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-top: 0.5rem;
}
.script-card-label {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
}
.script-summary { font-size: 0.9rem; margin-bottom: 0.75rem; color: var(--text); }
.script-instr-list { margin-bottom: 0.75rem; }
.script-instr-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--border-soft);
}
.script-instr-row:last-child { border-bottom: none; }
.script-instr-name { flex: 1; color: var(--text); }
.script-instr-source {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.script-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}
.script-meta strong { color: var(--text); }
.btn-download-script {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  background: var(--teal);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-download-script:hover { opacity: 0.85; }