/* Fuel Cell Power System — Multi-Page Layout (extends shared/simulator-theme.css) */

:root {
  --h2color: #39d9ff;
}

/* ── 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 PAGE LAYOUT ══════════════════ */
.status-grid {
  display: grid;
  grid-template-columns: 230px 1fr 230px;
  grid-template-rows: 1fr 220px;
  gap: 4px;
  padding: 4px;
  flex: 1 1 0;
  min-height: 0;
}
#schematic-panel { grid-column: 2; grid-row: 1 / 2; }
#schematic-panel svg { width: 100%; }
#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 260px;
  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;
}

/* ══════════════════ STACK CARDS ══════════════════ */
.stack-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  margin-bottom: 8px;
}
.stack-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.stack-name { font-size: 11px; font-weight: 600; color: var(--cyan); }
.stack-status {
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 2px;
}
.stack-status.run  { background: rgba(0,230,118,0.2); color: var(--green); }
.stack-status.standby { background: rgba(90,138,170,0.1); color: var(--muted); }
.stack-status.starting {
  background: rgba(255,171,0,0.2);
  color: var(--amber);
  animation: startup-pulse 1s infinite;
}
.stack-status.fault { background: rgba(255,23,68,0.2); color: var(--red); }
.stack-kw {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--green);
  text-align: center;
  margin: 4px 0;
}
.health-bar {
  height: 10px;
  background: rgba(255,255,255,0.05);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-top: 4px;
}
.health-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s, background 0.3s;
}

/* ══════════════════ STARTUP STAGES ══════════════════ */
.startup-stages {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 6px;
}
.stage {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 9px;
  font-family: var(--font-mono);
}
.stage-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}
.stage-dot.done    { background: var(--green); }
.stage-dot.active  { background: var(--amber); animation: pulse 0.8s infinite; }
.stage-dot.pending { background: var(--border); }

/* ══════════════════ SVG POWER FLOW ANIMATIONS ══════════════════ */
@keyframes powerflow { to { stroke-dashoffset: -12; } }
@keyframes startup-pulse { 0%,100% { opacity: 0.5; } 50% { opacity: 1; } }

.power-flow {
  stroke-dasharray: 6 3;
  animation: powerflow 0.5s linear infinite;
}
.power-flow.stopped { animation: none; opacity: 0.15; }
.flow-line { stroke-dasharray: 6 3; animation: powerflow 0.6s linear infinite; }
.flow-line.stopped { animation: none; opacity: 0.2; }

/* ══════════════════ ENVIRONMENTAL / ECO BOX ══════════════════ */
.eco-box {
  background: rgba(0,230,118,0.05);
  border: 1px solid rgba(0,230,118,0.3);
  border-radius: 4px;
  padding: 8px;
  margin-top: 8px;
  width: 100%;
}
.eco-title {
  font-size: 9px;
  color: var(--green);
  letter-spacing: 1px;
  margin-bottom: 4px;
  font-weight: 700;
}
.eco-row {
  font-size: 10px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 3px;
}
.eco-val { font-family: var(--font-mono); color: var(--green); }

/* ══════════════════ PEM EDUCATION BOX ══════════════════ */
.pem-edu {
  background: rgba(41,121,255,0.08);
  border: 1px solid rgba(41,121,255,0.3);
  border-radius: 4px;
  padding: 8px;
  width: 100%;
}
.pem-title {
  font-size: 9px;
  color: var(--blue);
  letter-spacing: 1px;
  margin-bottom: 4px;
  font-weight: 700;
}
.pem-row { font-size: 9px; color: var(--muted); line-height: 1.6; }

/* ══════════════════ CONTROL PANELS (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 ══════════════════ */
.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;
}

/* ══════════════════ SCENARIO BOX ══════════════════ */
.scenario-box {
  background: rgba(0,229,255,0.05);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 6px 8px;
  margin-bottom: 5px;
  font-size: 10px;
}
.scenario-title { color: var(--cyan); font-weight: 600; margin-bottom: 2px; }
.scenario-desc  { color: var(--muted); line-height: 1.5; }

/* ══════════════════ OPERATIONS LOG ══════════════════ */
.ops-log {
  font-size: 9px;
  font-family: var(--font-mono);
  color: var(--muted);
  max-height: 140px;
  overflow-y: auto;
}
.log-entry { display: flex; gap: 6px; padding: 2px 0; border-bottom: 1px solid rgba(255,255,255,0.03); }
.log-time  { color: var(--cyan); min-width: 50px; flex-shrink: 0; }

/* ══════════════════ H₂ BUTTON ══════════════════ */
.big-btn.h2btn {
  background: rgba(57,217,255,0.1);
  border-color: var(--h2color);
  color: var(--h2color);
}
.big-btn.h2btn:hover { background: rgba(57,217,255,0.2); }

/* ══════════════════ PIPELINE LINEUP ══════════════════ */
.pl-status {
  padding: 4px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  margin-bottom: 4px;
}
.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); }
.pl-sec {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--cyan);
  padding: 4px 0 2px;
  border-bottom: 1px solid var(--border);
  letter-spacing: 1px;
}
.pl-row { display: flex; align-items: center; gap: 4px; padding: 2px 0; font-size: 9px; }
.pl-id  { font-family: var(--font-mono); color: var(--muted); min-width: 55px; }
.pl-desc {
  flex: 1;
  color: rgba(255,255,255,0.4);
  font-size: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pl-vbtn {
  font-family: var(--font-mono);
  font-size: 8px;
  padding: 2px 6px;
  border-radius: 2px;
  cursor: pointer;
  min-width: 38px;
  text-align: center;
  transition: all 0.15s;
}
.pl-vbtn.open   { background: rgba(0,230,118,0.15); border: 1px solid var(--green); color: var(--green); }
.pl-vbtn.closed { background: rgba(255,23,68,0.1);  border: 1px solid var(--red);   color: var(--red); }
.pl-vbtn.req    { box-shadow: 0 0 4px var(--amber); }

/* ══════════════════ 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); }

/* ══════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 1200px) {
  .status-grid { grid-template-columns: 190px 1fr 190px; }
  .page-split  { grid-template-columns: 1fr 220px; }
}
@media (max-width: 1000px) {
  .status-grid { grid-template-columns: 160px 1fr 160px; }
  .page-split  { grid-template-columns: 1fr 200px; }
}
@media (max-height: 800px) {
  .status-grid { grid-template-rows: 1fr 170px; }
}
@media (max-height: 700px) {
  .status-grid { grid-template-rows: 1fr 140px; }
}

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