/* ── Mainframe Dashboard (COBOL Editor + Compile + Output) ──────
   Virtual dry-erase board for writing, compiling, and running COBOL.
   Three-column layout: Editor | Output | Quick Reference sidebar.
   ────────────────────────────────────────────────────────────────── */

/* ── Layout ──────────────────────────────────────────────────── */
.mainframe-layout {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr;
  gap: var(--sp-4);
  padding: var(--sp-4);
  height: calc(100vh - 56px - 32px);
}

.mainframe-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 260px;
  gap: var(--sp-4);
  min-height: 0;
}

@media (max-width: 1400px) {
  .mainframe-grid { grid-template-columns: 1fr 1fr; }
  .mf-sidebar { display: none; }
}

@media (max-width: 900px) {
  .mainframe-grid { grid-template-columns: 1fr; }
}

/* ── Controls Strip ──────────────────────────────────────────── */
.mainframe-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.mainframe-controls .controls__divider {
  width: 1px;
  height: 24px;
  background: var(--glass-border);
  margin: 0 var(--sp-1);
}

/* ── Editor Panel ────────────────────────────────────────────── */
.mf-editor {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.mf-editor__wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(10, 14, 30, 0.9);
}

/* Line numbers gutter */
.mf-editor__gutter {
  width: 40px;
  min-width: 40px;
  padding: var(--sp-2) var(--sp-1);
  background: rgba(0, 0, 0, 0.3);
  border-right: 1px solid var(--glass-border);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--text-muted);
  text-align: right;
  overflow: hidden;
  user-select: none;
  white-space: pre;
}

/* Editor content area (textarea + overlay stacked) */
.mf-editor__content {
  position: relative;
  flex: 1;
  min-width: 0;
  overflow: auto;
}

/* Textarea (transparent — captures input) */
.mf-editor__textarea {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
  color: transparent;
  caret-color: var(--success);
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  white-space: pre;
  overflow: auto;
  tab-size: 4;
  z-index: 2;
}

/* Highlighted overlay (visual — pointer-events: none) */
.mf-editor__overlay {
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
  white-space: pre;
  color: var(--text-primary);
  pointer-events: none;
  min-height: 100%;
  z-index: 1;
}

/* Column indicator lines (7, 12, 72) */
.mf-editor__col-indicators {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.mf-editor__col-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  opacity: 0.15;
}

.mf-editor__col-line--7 {
  background: var(--danger);
}

.mf-editor__col-line--12 {
  background: var(--success);
}

.mf-editor__col-line--72 {
  background: var(--warning);
}

.mf-editor__col-label {
  position: absolute;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--text-muted);
  opacity: 0.5;
  pointer-events: none;
  transform: translateX(-50%);
}

/* Format badge */
.mf-format-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 3px;
  font-family: var(--font-mono);
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.mf-format-badge--free {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

/* ── Output Panel (JCL Terminal) ─────────────────────────────── */
.mf-output {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.mf-output__terminal {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-3);
  background: rgba(10, 14, 30, 0.9);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--success);
  min-height: 200px;
}

.mf-output__entry {
  margin-bottom: var(--sp-3);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mf-output__entry:last-child {
  border-bottom: none;
}

.mf-output__job-card {
  color: #22c55e;
  font-weight: 700;
  opacity: 0.8;
}

.mf-output__line {
  display: block;
  min-height: 1.4em;
}

.mf-output__line--error {
  color: var(--danger);
}

.mf-output__line--warning {
  color: #f59e0b;
}

.mf-output__line--success {
  color: var(--success);
  font-weight: 600;
}

.mf-output__line--info {
  color: var(--text-muted);
}

.mf-output__line--clickable {
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 2px;
}

.mf-output__line--clickable:hover {
  color: var(--text-accent);
}

.mf-output__maxcc {
  font-weight: 700;
  font-size: var(--text-sm);
  margin-top: var(--sp-2);
}

.mf-output__maxcc--ok { color: var(--success); }
.mf-output__maxcc--warn { color: #f59e0b; }
.mf-output__maxcc--err { color: var(--danger); }

.mf-output__mode-banner {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 600;
  border-radius: 3px;
  margin-bottom: var(--sp-2);
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.mf-output__placeholder {
  color: var(--text-muted);
  font-style: italic;
  padding: var(--sp-4);
  text-align: center;
}

/* ── Quick Reference Sidebar ─────────────────────────────────── */
.mf-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  overflow-y: auto;
}

.mf-sidebar__section {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.mf-sidebar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-2) var(--sp-3);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  user-select: none;
}

.mf-sidebar__header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.mf-sidebar__header::after {
  content: '\25B6';
  font-size: 8px;
  transition: transform var(--transition-fast);
}

.mf-sidebar__section--open .mf-sidebar__header::after {
  transform: rotate(90deg);
}

.mf-sidebar__body {
  display: none;
  padding: var(--sp-2) var(--sp-3);
}

.mf-sidebar__section--open .mf-sidebar__body {
  display: block;
}

.mf-ref-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 10px;
}

.mf-ref-table td {
  padding: 2px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  vertical-align: top;
}

.mf-ref-table td:first-child {
  white-space: nowrap;
  font-weight: 600;
  color: var(--text-accent);
  width: 48px;
}

.mf-ref-table td:last-child {
  color: var(--text-muted);
}