/* help.css — In-app Help Modal */

/* ── Overlay ── */
#helpOverlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 10, 0.82);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
#helpOverlay.open {
  display: flex;
}

/* ── Modal shell ── */
#helpModal {
  background: var(--bg-panel);
  border: 1px solid var(--border-hi);
  border-radius: 8px;
  width: min(860px, 94vw);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7), 0 0 0 1px rgba(240,165,0,0.06);
}

/* ── Modal header ── */
#helpModalHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-panel2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#helpModalHeader .help-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-primary);
}
#helpModalHeader .help-subtitle {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  margin-top: 1px;
}
#btnCloseHelp {
  background: transparent;
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 16px;
  width: 30px; height: 30px;
  cursor: pointer;
  line-height: 1;
  transition: all 0.15s;
  display: flex; align-items: center; justify-content: center;
}
#btnCloseHelp:hover { border-color: var(--red); color: var(--red); }

/* ── Tab bar ── */
#helpTabs {
  display: flex;
  background: var(--bg-panel2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
#helpTabs::-webkit-scrollbar { display: none; }

.help-tab {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 9px 18px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}
.help-tab:hover { color: var(--text-primary); }
.help-tab.active {
  color: var(--amber);
  border-bottom-color: var(--amber);
  background: rgba(240,165,0,0.05);
}

/* ── Content area ── */
#helpContent {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
  min-height: 0;
}

/* ── Help page (hidden by default) ── */
.help-page { display: none; }
.help-page.active { display: block; }

/* ── Typography inside help ── */
.help-page h2 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.help-page .help-lead {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 20px;
  max-width: 640px;
}
.help-page h3 {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber);
  text-transform: uppercase;
  margin: 22px 0 8px;
}
.help-page h3:first-of-type { margin-top: 0; }

.help-page p {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.65;
  margin-bottom: 10px;
  max-width: 680px;
}

/* ── Signal flow diagram ── */
.signal-flow {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 18px 0 22px;
  flex-wrap: wrap;
  gap: 4px;
}
.flow-block {
  background: var(--bg-panel2);
  border: 1px solid var(--border-hi);
  border-radius: 4px;
  padding: 8px 14px;
  text-align: center;
}
.flow-block .fb-tag {
  font-size: 9px;
  color: var(--amber);
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
  display: block;
  margin-bottom: 2px;
}
.flow-block .fb-name {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.06em;
}
.flow-arrow {
  color: var(--text-muted);
  font-size: 16px;
  padding: 0 2px;
  flex-shrink: 0;
}
.flow-arrow.feedback {
  color: var(--cyan-dim);
}
.flow-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

/* ── Info table ── */
.help-table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0 18px;
  font-size: 12.5px;
}
.help-table th {
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
  padding: 5px 12px 5px 0;
  border-bottom: 1px solid var(--border);
}
.help-table td {
  padding: 7px 12px 7px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
  line-height: 1.5;
}
.help-table td:first-child {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  white-space: nowrap;
  padding-right: 20px;
}
.help-table tr:last-child td { border-bottom: none; }

/* ── Code block ── */
.help-code {
  background: #080b10;
  border: 1px solid var(--border-hi);
  border-radius: 4px;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: #abb2c0;
  line-height: 1.6;
  margin: 10px 0 16px;
  overflow-x: auto;
  white-space: pre;
}
.help-code .cm-comment { color: #5a6680; }
.help-code .cm-kw      { color: #c678dd; }
.help-code .cm-str     { color: #98c379; }
.help-code .cm-num     { color: #d19a66; }
.help-code .cm-fn      { color: #61afef; }
.help-code .cm-var     { color: #e06c75; }

/* ── Callout / tip box ── */
.help-tip {
  background: var(--amber-glow);
  border: 1px solid var(--amber-dim);
  border-left: 3px solid var(--amber);
  border-radius: 4px;
  padding: 10px 14px;
  margin: 14px 0;
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.55;
}
.help-tip strong { color: var(--amber); font-weight: 600; }

.help-tip-cyan {
  background: rgba(0,212,232,0.07);
  border: 1px solid var(--cyan-dim);
  border-left: 3px solid var(--cyan);
}
.help-tip-cyan strong { color: var(--cyan); }

/* ── Quick-start steps ── */
.qs-steps {
  counter-reset: qs;
  list-style: none;
  padding: 0;
  margin: 12px 0 20px;
}
.qs-steps li {
  counter-increment: qs;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
}
.qs-steps li::before {
  content: counter(qs);
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--amber-glow);
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  display: flex; align-items: center; justify-content: center;
}
.qs-steps li .qs-text {
  padding-top: 3px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
}
.qs-steps li .qs-text strong { color: var(--text-primary); }

/* ── ? button in header ── */
#btnHelp {
  font-family: var(--font-mono);
  font-size: 14px;
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border-hi);
  background: var(--bg-panel2);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
  margin-left: 10px;
  flex-shrink: 0;
}
#btnHelp:hover {
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 0 0 10px var(--amber-glow);
}