/* FILE: css/layout.css — Grid, flex layout, panel containers, navigation */

/* ── App Shell ─────────────────────────────────────────────────────────────── */
#app {
  display: grid;
  grid-template-rows: 48px 36px 1fr 32px;
  grid-template-columns: 1fr;
  height: 100vh;
  overflow: hidden;
  background: var(--c-panel-dark);
}

/* ── Header bar ─────────────────────────────────────────────────────────────── */
#header {
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  background: linear-gradient(180deg, #0d0f12 0%, var(--c-panel-mid) 100%);
  border-bottom: 2px solid var(--c-trim);
  box-shadow: 0 2px 12px rgba(0,0,0,0.7);
  z-index: 100;
}

#header .plant-name {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--c-amber);
  text-shadow: 0 0 20px var(--c-amber-glow);
  text-transform: uppercase;
}

#header .header-center {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

#header .header-right {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.sim-time-display {
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  color: var(--c-green);
  letter-spacing: 0.1em;
  text-shadow: var(--shadow-glow-green);
}

.compression-badge {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--c-amber);
  background: rgba(255,171,0,0.12);
  border: 1px solid var(--c-amber-dim);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.15s;
}
.compression-badge:hover { background: rgba(255,171,0,0.22); }

.plant-status-badge {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid;
}
.plant-status-badge.nominal { color: var(--c-green); border-color: var(--c-green-dim); background: var(--c-green-glow); }
.plant-status-badge.warning { color: var(--c-amber); border-color: var(--c-amber-dim); background: var(--c-amber-glow); }
.plant-status-badge.alarm   { color: var(--c-red);   border-color: var(--c-red-dim);   background: var(--c-red-glow); }
.plant-status-badge.cold    { color: var(--c-gray);  border-color: var(--c-gray-dim);  background: transparent; }

/* ── Tab Navigation ─────────────────────────────────────────────────────────── */
#tab-bar {
  grid-row: 2;
  display: flex;
  align-items: stretch;
  background: var(--c-panel-mid);
  border-bottom: 1px solid var(--c-trim);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
#tab-bar::-webkit-scrollbar { display: none; }

.tab-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 14px;
  font-family: var(--font-label);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  position: relative;
}
.tab-btn:hover {
  color: var(--c-white);
  background: rgba(255,255,255,0.04);
}
.tab-btn.active {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
  background: rgba(255,171,0,0.06);
}
.tab-btn .tab-icon { font-size: 11px; opacity: 0.8; }
.tab-btn.electrical { border-bottom-color: var(--c-orange); }
.tab-btn.electrical.active { color: var(--c-orange); background: rgba(255,109,0,0.06); }
.tab-alarm-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-red);
  flex-shrink: 0;
}

/* ── Main content area ──────────────────────────────────────────────────────── */
#main-content {
  grid-row: 3;
  position: relative;
  overflow: hidden;
  background: var(--c-panel-dark);
}

.panel {
  display: none;
  position: absolute;
  inset: 0;
  overflow: auto;
  padding: var(--sp-3);
  scrollbar-width: thin;
  scrollbar-color: var(--c-trim) transparent;
}
.panel.active { display: block; }
.panel::-webkit-scrollbar { width: 6px; }
.panel::-webkit-scrollbar-track { background: transparent; }
.panel::-webkit-scrollbar-thumb { background: var(--c-trim); border-radius: 3px; }

/* ── Status bar ─────────────────────────────────────────────────────────────── */
#status-bar {
  grid-row: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  background: #0a0b0d;
  border-top: 1px solid var(--c-trim);
  font-size: var(--fs-tiny);
  color: var(--c-text-muted);
  font-family: var(--font-mono);
}
.status-bar-item { display: flex; align-items: center; gap: var(--sp-2); }
.status-bar-item .dot { width: 5px; height: 5px; border-radius: 50%; }

/* ── Grid layouts for panel content ─────────────────────────────────────────── */
.panel-grid-2   { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
.panel-grid-3   { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--sp-3); }
.panel-grid-4   { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); }
.panel-grid-auto{ display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--sp-3); }

/* ── Subsystem card ─────────────────────────────────────────────────────────── */
.card {
  background: var(--c-panel-mid);
  border: var(--border-panel);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  background: var(--c-panel-light);
  border-bottom: var(--border-panel);
}
.card-body   { padding: var(--sp-3); }
.card-footer {
  padding: var(--sp-2) var(--sp-3);
  border-top: var(--border-panel);
  background: rgba(0,0,0,0.2);
}

/* ── Scrollable sub-panel ───────────────────────────────────────────────────── */
.sub-panel {
  background: var(--c-panel-mid);
  border: var(--border-panel);
  border-radius: var(--radius-md);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--c-trim) transparent;
}

/* ── Mobile guard ───────────────────────────────────────────────────────────── */
#mobile-guard {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--c-panel-dark);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--sp-4);
  text-align: center;
  padding: var(--sp-8);
}
#mobile-guard .mobile-icon { font-size: 3rem; }
#mobile-guard p { color: var(--c-text-dim); font-size: var(--fs-md); }

@media (max-width: 1279px) {
  #mobile-guard { display: flex; }
}

/* ── Auto directive console overlay ────────────────────────────────────────── */
#directive-console {
  position: fixed;
  bottom: 32px; /* above status bar */
  right: 0;
  width: 340px;
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.25s ease;
}
#directive-console.open { transform: translateX(0); }
#directive-toggle {
  position: fixed;
  bottom: 80px;
  right: 0;
  z-index: 201;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: var(--fs-xs);
  background: var(--c-panel-light);
  border: var(--border-panel);
  border-right: none;
  padding: var(--sp-3) var(--sp-2);
  cursor: pointer;
  color: var(--c-amber);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
}