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

:root {
  --crude:    #cc8800;
  --crude2:   #ff9900;
  --ig-green: #39d353;
  --slop:     #8b4513;
  --ballast:  #2979ff;
}

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

/* ══════════════════ NAVIGATION BAR ══════════════════ */
#nav-bar {
  background: rgba(5,8,0,0.97);
  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(0,0,0,0.35);
  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(--crude2); background: rgba(204,136,0,0.07); }
.nav-grp.active {
  color: var(--crude2);
  background: rgba(204,136,0,0.12);
  border-color: rgba(204,136,0,0.4);
}
#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(--ig-green); background: rgba(57,211,83,0.06); }
.nav-pg.active {
  color: var(--ig-green);
  background: rgba(57,211,83,0.1);
  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: 220px 1fr 220px;
  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; }
#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 270px;
  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 PANEL SIDEBAR ══════════════════ */
.ctrl-section { margin-bottom: 10px; }
.ctrl-section-hdr {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--crude2);
  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(204,136,0,0.12); color: var(--crude2); }
.ctrl-btn.active { background: rgba(57,211,83,0.15); border-color: var(--ig-green); color: var(--ig-green); }
.ctrl-btn.danger { background: rgba(255,23,68,0.1); border-color: var(--red); color: var(--red); }
.ctrl-btn.danger:hover { background: rgba(255,23,68,0.22); }

.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(--crude2); }
.mode-btn.active { background: rgba(57,211,83,0.12); border-color: var(--ig-green); color: var(--ig-green); }

.ctrl-slider { width: 100%; margin: 4px 0; accent-color: var(--crude); }

.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(--ig-green); box-shadow: 0 0 4px var(--ig-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; }

/* ══════════════════ IG STATUS BARS ══════════════════ */
.ig-bar {
  background: rgba(57,211,83,0.1);
  border: 1px solid var(--ig-green);
  padding: 4px 8px;
  border-radius: 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}
.ig-bar.warn  { border-color: var(--amber); background: rgba(255,171,0,0.08); }
.ig-bar.alarm { border-color: var(--red); background: rgba(255,23,68,0.1); animation: alarmblink 1s infinite; }

/* ══════════════════ TANK GRIDS ══════════════════ */
.tank-grid-sm {
  display: grid;
  grid-template-columns: repeat(7,1fr);
  gap: 2px;
}
.tank-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 3px 2px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}
.tank-cell:hover { border-color: var(--crude); }
.tank-cell-lbl { font-size: 7px; color: var(--muted); }
.tank-cell-val { font-family: var(--font-mono); font-size: 10px; color: var(--crude); }
.tank-cell-ig  { font-size: 7px; color: var(--ig-green); }
.tank-cell.hi   { border-color: var(--amber); }
.tank-cell.crit { border-color: var(--red); animation: alarmblink 1.2s infinite; }
.tank-cell.slop { border-color: rgba(139,69,19,0.6); }

/* ══════════════════ GAS DETECTION CELLS ══════════════════ */
.ppm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.ppm-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 4px 6px;
}
.ppm-cell.lel25  { border-color: var(--amber); background: rgba(255,171,0,0.07); }
.ppm-cell.lel60  { border-color: var(--red); background: rgba(255,23,68,0.1); animation: alarmblink 1s infinite; }
.ppm-zone { font-size: 8px; color: var(--muted); }
.ppm-val  { font-family: var(--font-mono); font-size: 18px; color: var(--green); margin: 1px 0; }
.ppm-val.warn  { color: var(--amber); }
.ppm-val.alarm { color: var(--red); }
.ppm-bar  { height: 4px; border-radius: 2px; background: var(--green); transition: width 0.3s, background 0.3s; }

/* ══════════════════ OPERATION BUTTONS ══════════════════ */
.big-btn.esd   { background: rgba(255,23,68,0.15);  border-color: var(--red);    color: var(--red); }
.big-btn.esd:hover  { background: rgba(255,23,68,0.4); }
.big-btn.esd.fired  { background: var(--red2); color: #fff; animation: alarmblink 0.5s infinite; }
.big-btn.load  { background: rgba(57,211,83,0.1);   border-color: var(--ig-green); color: var(--ig-green); }
.big-btn.load:hover  { background: rgba(57,211,83,0.25); }
.big-btn.disch { background: rgba(0,229,255,0.08);  border-color: var(--cyan);   color: var(--cyan); }
.big-btn.disch:hover { background: rgba(0,229,255,0.2); }
.big-btn.cow   { background: rgba(204,136,0,0.1);   border-color: var(--crude);  color: var(--crude); }
.big-btn.cow:hover   { background: rgba(204,136,0,0.28); }
.big-btn.reset { background: rgba(255,255,255,0.04); border-color: var(--muted); color: var(--muted); }
.big-btn.reset:hover { color: var(--white); border-color: var(--white); }

/* ══════════════════ SCENARIO BOX ══════════════════ */
.scenario-box {
  background: rgba(204,136,0,0.05);
  border: 1px solid rgba(204,136,0,0.3);
  border-radius: 3px;
  padding: 6px 8px;
  margin-bottom: 5px;
  font-size: 10px;
}
.scenario-title { color: var(--crude2); font-weight: 600; margin-bottom: 2px; }
.scenario-desc  { color: var(--muted); line-height: 1.5; }

/* ══════════════════ PIPELINE LINE-UP ══════════════════ */
.pl-status {
  padding: 4px 6px; border-radius: 3px;
  font-family: var(--font-mono); font-size: 9px; margin-bottom: 6px;
}
.pl-status.ok    { background: rgba(57,211,83,0.1); color: var(--ig-green); border: 1px solid rgba(57,211,83,0.3); }
.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(204,136,0,0.05); color: var(--muted); border: 1px solid var(--border); }
.pl-sec {
  font-family: var(--font-mono); font-size: 8px; color: var(--crude2);
  padding: 4px 0 2px; border-bottom: 1px solid var(--border); letter-spacing: 1px; margin-bottom: 2px;
}
.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(255,255,255,0.38); 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: 40px; text-align: center; transition: all 0.15s;
}
.pl-vbtn.open   { background: rgba(57,211,83,0.15);  border: 1px solid var(--ig-green); color: var(--ig-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); }

/* ══════════════════ PUMP / COW STATUS ══════════════════ */
.pump-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
  margin-bottom: 4px;
}
.pump-cell.running { border-color: var(--ig-green); background: rgba(57,211,83,0.06); }
.pump-cell.fault   { border-color: var(--red); background: rgba(255,23,68,0.08); }
.pump-cell-name  { font-family: var(--font-mono); font-size: 10px; color: var(--crude2); margin-bottom: 3px; }
.pump-cell-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.pump-stat-lbl   { font-size: 8px; color: var(--muted); }
.pump-stat-val   { font-family: var(--font-mono); font-size: 11px; color: var(--green); }
.pump-stat-val.warn  { color: var(--amber); }
.pump-stat-val.alarm { color: var(--red); }

/* ══════════════════ HOTLINKS ══════════════════ */
.hotlink {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--crude2);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}
.hotlink:hover { color: var(--ig-green); }

/* ══════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 1200px) {
  .status-grid  { grid-template-columns: 190px 1fr 190px; }
  .page-split   { grid-template-columns: 1fr 230px; }
  .tank-grid-sm { grid-template-columns: repeat(7,1fr); }
}
@media (max-width: 1000px) {
  .status-grid  { grid-template-columns: 165px 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; }
}