/* H₂ Fuel Ship Simulator — Multi-Page Layout (extends shared/simulator-theme.css) */

/* ── H₂ brand colour ── */
:root {
  --h2: #40ffaa;
  --h2b: #20cc80;
}

/* ── 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(--h2); background: rgba(64,255,170,0.06); }
.nav-grp.active {
  color: var(--h2);
  background: rgba(64,255,170,0.1);
  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);
}

/* ══════════════════ EMBRITTLEMENT BANNER ══════════════════ */
.emb-banner {
  display: none;
  background: #1a3010;
  border-bottom: 2px solid var(--amber);
  color: var(--amber);
  text-align: center;
  padding: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  z-index: 50;
  animation: blink 0.8s infinite;
  flex-shrink: 0;
}

/* ══════════════════ 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 ══════════════════ */
.status-grid {
  display: grid;
  grid-template-columns: 220px 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 { width: 100%; height: 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;
}

/* ══════════════════ CONTROL PANELS (sidebar) ══════════════════ */
.ctrl-section {
  margin-bottom: 10px;
}
.ctrl-section-hdr {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--h2);
  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(64,255,170,0.1); color: var(--h2); }
.ctrl-btn.active { background: rgba(64,255,170,0.15); border-color: var(--h2); color: var(--h2); }
.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(--h2); }
.mode-btn.active {
  background: rgba(64,255,170,0.12);
  border-color: var(--h2);
  color: var(--h2);
}

/* Slider control */
.ctrl-slider {
  width: 100%;
  margin: 4px 0;
  accent-color: var(--h2);
}

/* 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; }

/* ══════════════════ FUEL CELL BOX ══════════════════ */
.fc-box {
  border: 1px solid var(--blue);
  border-radius: 3px;
  padding: 5px 8px;
  background: rgba(64,170,255,0.04);
  margin-bottom: 5px;
}
.fc-title {
  font-size: 9px;
  color: var(--blue);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.fc-val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--blue);
}

/* ══════════════════ ACTION BUTTONS ══════════════════ */
.btn-fc {
  background: rgba(64,170,255,0.08);
  border-color: var(--blue);
  color: var(--blue);
}
.btn-fc:hover { background: rgba(64,170,255,0.2); }

/* ══════════════════ GAS DETECTION GRID ══════════════════ */
.det-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.det-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 7px;
}
.det-cell.w10 { border-color: var(--amber); background: rgba(255,221,0,0.07); }
.det-cell.w25 { border-color: var(--red); background: rgba(255,68,34,0.1); animation: fireflash 1s infinite; }
.det-zone { font-size: 10px; color: var(--muted); }
.det-val { font-family: var(--font-mono); font-size: 17px; color: var(--green); margin: 1px 0; }
.det-val.warn { color: var(--amber); }
.det-val.alarm { color: var(--red); }
.det-bar { height: 4px; border-radius: 2px; background: var(--green); transition: width 0.3s, background 0.3s; }

/* ══════════════════ SCENARIO STATUS ══════════════════ */
.scenario-box {
  background: rgba(64,255,170,0.04);
  border: 1px solid rgba(64,255,170,0.2);
  border-radius: 3px;
  padding: 6px 8px;
  margin-bottom: 5px;
  font-size: 10px;
}
.scenario-title { color: var(--h2); font-weight: 600; margin-bottom: 2px; }
.scenario-desc { color: var(--muted); line-height: 1.5; }

/* ══════════════════ BUNKERING BUTTON ══════════════════ */
.big-btn.bunk { background: rgba(64,255,170,0.06); border-color: var(--h2); color: var(--h2); }
.big-btn.bunk:hover { background: rgba(64,255,170,0.18); }

/* ══════════════════ ALARM ITEMS ══════════════════ */
.alm-item.fire { border-left-color: var(--red); animation: fireflash 1s infinite; }
.alm-item.warn { border-left-color: var(--amber); background: rgba(255,221,0,0.07); }
.alm-item.h2-alm { border-left-color: var(--h2); animation: h2flash 1.2s infinite; }
.alm-item.clear { border-left-color: var(--green); opacity: 0.6; }
.alm-tag.F { background: rgba(255,68,34,0.3); color: var(--red); }
.alm-tag.I { background: rgba(64,255,170,0.15); color: var(--h2); }

@keyframes fireflash {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes h2flash {
  0%, 100% { background: rgba(64,255,170,0.06); }
  50% { background: rgba(64,255,170,0.18); }
}

/* ══════════════════ PIPELINE LINEUP ══════════════════ */
.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(64,255,170,0.04); color: var(--muted); border: 1px solid var(--border); }
.pl-sec { font-family: var(--font-mono); font-size: 8px; color: var(--h2); 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: 60px; }
.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.transitioning { background: rgba(255,171,0,0.12); border-color: var(--amber); color: var(--amber); }
.pl-vbtn.req { box-shadow: 0 0 4px var(--amber); }

/* ══════════════════ HOTLINKS ══════════════════ */
.hotlink {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--h2);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}
.hotlink:hover { color: var(--green); }

/* ══════════════════ GAS DETECTOR SAMPLE POINTS ══════════════════ */
.sample-pt {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 6px; border-radius: 2px; cursor: pointer;
  transition: background 0.15s;
}
.sample-pt:hover { background: rgba(64,255,170,0.08); }
.sample-pt.active-sample { background: rgba(64,255,170,0.12); }
.sample-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted);
}
.sample-dot.sampling { background: var(--amber); animation: blink 1s infinite; }
.sample-dot.sampled { background: var(--green); }

/* ══════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 1200px) {
  .status-grid { grid-template-columns: 185px 1fr 190px; }
  .page-split { grid-template-columns: 1fr 220px; }
}
@media (max-width: 1000px) {
  .status-grid { grid-template-columns: 160px 1fr 165px; }
  .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 145px; }
}
.ctrl-group { margin-bottom: 8px; }