/* Boiler Simulator — Multi-Page Layout (extends shared/simulator-theme.css) */

/* ── Body must be flex column for multi-page layout ── */
body {
  display: flex !important;
  flex-direction: column !important;
}

/* ══════════════════ NAVIGATION BAR ══════════════════ */
#nav-bar {
  background: rgba(5,13,20,0.95);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  user-select: none;
  z-index: 20;
  flex-shrink: 0;
}
#nav-groups {
  display: flex;
  gap: 1px;
  padding: 2px 4px;
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.nav-grp {
  background: rgba(255,255,255,0.03);
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.15s;
  border-radius: 3px 3px 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-grp:hover { color: var(--cyan); background: rgba(0,229,255,0.06); }
.nav-grp.active {
  color: var(--cyan);
  background: rgba(0,229,255,0.1);
  border-color: var(--border2);
}
#nav-pages {
  display: flex;
  gap: 1px;
  padding: 2px 4px;
  min-height: 24px;
  overflow: hidden;
}
.nav-pg {
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-pg:hover { color: var(--green); background: rgba(0,230,118,0.06); }
.nav-pg.active {
  color: var(--green);
  background: rgba(0,230,118,0.1);
  border-color: var(--border);
}

/* ══════════════════ DISPLAY AREA ══════════════════ */
#display-area {
  flex: 1 1 0;
  overflow: hidden;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.disp-page {
  display: none !important;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}
.disp-page.active {
  display: flex !important;
  flex-direction: column;
}

/* ══════════════════ STATUS OVERVIEW PAGE ══════════════════ */
.status-grid {
  display: grid;
  grid-template-columns: 220px 1fr 240px;
  grid-template-rows: 1fr 200px;
  gap: 4px;
  padding: 4px;
  flex: 1 1 0;
  min-height: 0;
}
#schematic-panel { grid-column: 2; grid-row: 1 / 2; }
#pnl-alarms      { grid-column: 3; grid-row: 1 / 2; }
#bottom          { grid-column: 1 / 4; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 4px; }

/* ══════════════════ PAGE LAYOUTS ══════════════════ */
.page-split {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4px;
  padding: 4px;
  flex: 1 1 0;
  min-height: 0;
}
.page-main { min-width: 0; overflow: hidden; }
.page-side { overflow: hidden; }
.page-full {
  padding: 4px;
  flex: 1 1 0;
  min-height: 0;
}
.page-split canvas,
.page-full canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ══════════════════ CONTROL SECTIONS (sidebar) ══════════════════ */
.ctrl-section {
  margin-bottom: 10px;
}
.ctrl-section-hdr {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--cyan);
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
}
.ctrl-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 0;
  font-size: 10px;
  color: var(--muted);
}
.ctrl-row .val {
  font-family: var(--font-mono);
  color: var(--green);
}
.ctrl-row .val.warn  { color: var(--amber); }
.ctrl-row .val.alarm { color: var(--red); }

.ctrl-btn {
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 3px 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}
.ctrl-btn:hover  { background: rgba(0,229,255,0.1); color: var(--cyan); }
.ctrl-btn.active { background: rgba(0,230,118,0.15); border-color: var(--green); color: var(--green); }
.ctrl-btn.danger { background: rgba(255,23,68,0.1);  border-color: var(--red);   color: var(--red); }
.ctrl-btn.danger:hover { background: rgba(255,23,68,0.2); }

/* Mode toggle buttons */
.mode-group {
  display: flex;
  gap: 2px;
  margin: 4px 0;
}
.mode-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 8px;
  padding: 4px 6px;
  text-align: center;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.mode-btn:hover { color: var(--cyan); }
.mode-btn.active {
  background: rgba(0,230,118,0.12);
  border-color: var(--green);
  color: var(--green);
}

/* Slider control */
.ctrl-slider {
  width: 100%;
  margin: 4px 0;
  accent-color: var(--cyan);
}

/* Indicator lights */
.ind-light {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  margin-right: 4px;
  vertical-align: middle;
}
.ind-light.on    { background: var(--green); box-shadow: 0 0 4px var(--green); }
.ind-light.warn  { background: var(--amber); box-shadow: 0 0 4px var(--amber); }
.ind-light.alarm { background: var(--red);   box-shadow: 0 0 4px var(--red);   animation: alarmblink 1s infinite; }

/* ══════════════════ NRV VALVE COMPONENT ══════════════════ */
.nrv-status-section {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}
.nrv-valve {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.nrv-label {
  font-size: 8px;
  font-family: var(--font-mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: center;
}
.nrv-status {
  font-size: 9px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.5px;
  text-align: center;
}

/* ══════════════════ TRENDS PAGE ══════════════════ */
.trend-tile {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 7px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.trend-tile-label {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--muted);
  letter-spacing: 0.5px;
}
.trend-tile-val {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--green);
  line-height: 1;
}
.trend-tile-unit {
  font-size: 10px;
  color: var(--muted);
}
.trend-mini-canvas {
  width: 100%;
  height: 28px;
  display: block;
}

/* ══════════════════ PIPELINE / VALVE STATUS ══════════════════ */
.pl-status { padding: 4px 6px; border-radius: 3px; font-family: var(--font-mono); font-size: 9px; margin-bottom: 6px; }
.pl-status.ok    { background: rgba(0,230,118,0.1);  color: var(--green); border: 1px solid rgba(0,230,118,0.3); }
.pl-status.fault { background: rgba(255,23,68,0.1);  color: var(--red);   border: 1px solid rgba(255,23,68,0.3); animation: alarmblink 1.5s infinite; }
.pl-status.idle  { background: rgba(0,229,255,0.05); color: var(--muted); border: 1px solid var(--border); }

/* ══════════════════ HOTLINKS ══════════════════ */
.hotlink {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--cyan);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}
.hotlink:hover { color: var(--green); }

/* ══════════════════ REG BADGE ══════════════════ */
.reg-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--cyan);
  border: 1px solid rgba(0,229,255,0.3);
  padding: 3px 8px;
  border-radius: 2px;
  letter-spacing: 1px;
  white-space: nowrap;
}

/* ══════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 1300px) {
  .status-grid { grid-template-columns: 190px 1fr 210px; }
  .page-split  { grid-template-columns: 1fr 240px; }
}
@media (max-width: 1100px) {
  .status-grid { grid-template-columns: 170px 1fr 190px; }
  .page-split  { grid-template-columns: 1fr 210px; }
}
@media (max-height: 800px) {
  .status-grid { grid-template-rows: 1fr 170px; }
}
@media (max-height: 700px) {
  .status-grid { grid-template-rows: 1fr 150px; }
}

/* ══════════════════ MISC UTILITIES ══════════════════ */
.ctrl-group { margin-bottom: 8px; }