:root {
  --bg: #0b0f14;
  --panel: #121924;
  --panel-2: #16202c;
  --border: #223042;
  --text: #e7eef7;
  --text-dim: #8ea2b8;
  --accent: #3ddc97;
  --accent-2: #ffb84d;
  --coal: #6b7280;
  --gas: #4f9dff;
  --danger: #ff5d5d;
  --warn: #ffb84d;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
}

button {
  font-family: inherit;
}

#blackoutFlash {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle, rgba(255, 93, 93, 0.35), rgba(255, 93, 93, 0));
  opacity: 0;
  pointer-events: none;
  z-index: 999;
  transition: opacity 0.15s ease;
}
#blackoutFlash.active {
  opacity: 1;
}

#topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
  background: linear-gradient(180deg, #121924, #0e1520);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo-gtd { height: 34px; width: auto; display: block; }
.brand-sub { color: var(--text-dim); font-size: 12px; }

.clock-block { text-align: center; min-width: 120px; }
.clock-day { font-size: 12px; color: var(--text-dim); }
.clock-time { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.clock-window { font-size: 11px; color: var(--text-dim); }
.clock-window.daytime { color: var(--accent); }

.stat-block { display: flex; gap: 22px; margin-left: auto; }
.stat { text-align: right; }
.stat-label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-value.positive { color: var(--accent); }
.stat-value.negative { color: var(--danger); }
.stat-value.pulse { animation: pulse 0.6s ease infinite; }

@keyframes pulse {
  0%, 100% { text-shadow: 0 0 0 rgba(255, 184, 77, 0); }
  50% { text-shadow: 0 0 12px rgba(255, 184, 77, 0.9); }
}

.controls { display: flex; align-items: center; gap: 8px; }

.btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #06120c; font-weight: 700; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.icon-btn { padding: 8px 10px; }

.speed-group { display: flex; gap: 2px; background: var(--panel-2); border-radius: 6px; padding: 2px; }
.speed-btn { border: none; background: transparent; padding: 6px 10px; border-radius: 5px; }
.speed-btn.active { background: var(--accent); color: #06120c; font-weight: 700; }

.callout-banner {
  position: fixed;
  top: 78px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #1c2b22, #16202c);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  z-index: 50;
  box-shadow: 0 6px 24px rgba(61, 220, 151, 0.25);
  transition: opacity 0.3s, transform 0.3s;
}
.callout-banner.hidden { opacity: 0; pointer-events: none; transform: translate(-50%, -8px); }

#layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  grid-template-rows: auto auto;
  gap: 14px;
  padding: 16px 20px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.panel-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 10px;
}

#chartPanel { grid-column: 1; grid-row: 1; }
#meritPanel { grid-column: 2; grid-row: 1; }
#plantsPanel { grid-column: 1; grid-row: 2; }
#logPanel { grid-column: 2; grid-row: 2; }

#priceChart { width: 100%; height: 230px; display: block; }

.chart-legend { display: flex; gap: 16px; font-size: 12px; color: var(--text-dim); margin-top: 8px; }
.chart-legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; }
.swatch.demand { background: #4f9dff55; border: 1px solid #4f9dff; }
.swatch.price { background: var(--accent-2); }
.swatch.window { background: #ffffff18; }

.merit-stack {
  display: flex;
  height: 90px;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  background: #0a0f16;
  border: 1px solid var(--border);
}
.merit-bar {
  height: 100%;
  border-right: 1px solid rgba(0,0,0,0.4);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 9px;
  color: rgba(0,0,0,0.55);
  position: relative;
  transition: opacity 0.2s;
}
.merit-bar.fuel-coal { background: linear-gradient(180deg, #9aa3ad, var(--coal)); }
.merit-bar.fuel-gas { background: linear-gradient(180deg, #86c0ff, var(--gas)); }
.merit-bar.idle { opacity: 0.25; }
.merit-bar.player { outline: 2px solid var(--accent-2); outline-offset: -2px; }
.merit-bar.marginal { outline: 2px solid #fff; outline-offset: -2px; }
.merit-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #fff;
  box-shadow: 0 0 8px #fff;
}
.merit-meta { display: flex; gap: 20px; margin-top: 10px; font-size: 13px; color: var(--text-dim); }
.merit-meta b { color: var(--text); }

.plant-cards { display: flex; flex-direction: column; gap: 10px; }
.plant-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 4px 14px;
  align-items: center;
}
.plant-card.marginal-now { border-color: var(--accent-2); box-shadow: 0 0 0 1px var(--accent-2) inset; }
.plant-name { font-weight: 700; grid-column: 1 / span 2; }
.plant-fuel-badge {
  font-size: 10px;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
}
.plant-fuel-badge.coal { background: var(--coal); color: #fff; }
.plant-fuel-badge.gas { background: var(--gas); color: #04182c; }
.plant-status { grid-column: 1 / -1; font-size: 12px; color: var(--text-dim); display: flex; gap: 14px; flex-wrap: wrap; }
.plant-status .tag { padding: 1px 6px; border-radius: 4px; background: #0a0f16; border: 1px solid var(--border); }
.plant-status .tag.running { color: var(--accent); border-color: var(--accent); }
.plant-status .tag.down, .plant-status .tag.degraded { color: var(--danger); border-color: var(--danger); }
.plant-status .tag.held { color: var(--warn); border-color: var(--warn); }
.plant-toggles { grid-column: 1 / -1; display: flex; gap: 8px; margin-top: 4px; }
.plant-toggles .btn { font-size: 11px; padding: 5px 9px; }
.plant-toggles .btn.on { background: var(--accent); color: #06120c; border-color: var(--accent); }

.log-feed { display: flex; flex-direction: column; gap: 6px; max-height: 420px; overflow-y: auto; font-size: 12.5px; }
.log-entry { padding: 6px 8px; border-radius: 5px; background: var(--panel-2); border-left: 3px solid var(--border); }
.log-entry .log-time { color: var(--text-dim); margin-right: 6px; font-variant-numeric: tabular-nums; }
.log-entry.callout { border-left-color: var(--accent); }
.log-entry.blackout { border-left-color: var(--danger); }
.log-entry.event { border-left-color: var(--warn); }
.log-entry.event-resolved { border-left-color: var(--gas); }
.log-entry.recap { border-left-color: var(--accent-2); font-weight: 600; }
.log-entry.day { border-left-color: #fff; font-weight: 600; }
.log-entry.contract { border-left-color: #b57bff; }
.log-entry.warn { border-left-color: var(--warn); }

.modal-wrap {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 11, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}
.modal-wrap.hidden { display: none; }

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 92%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.modal-body { color: var(--text-dim); font-size: 14px; line-height: 1.5; }
.modal-body p { margin: 0 0 10px; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; justify-content: flex-end; flex-wrap: wrap; }
.modal-actions .btn { flex: 1; min-width: 140px; }

.recap-headline { font-size: 20px; font-weight: 700; margin: 8px 0 16px; color: var(--accent-2); }
.recap-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; font-size: 13px; }
.recap-stats .k { color: var(--text-dim); }
.recap-stats .v { font-weight: 700; float: right; }

@media (max-width: 980px) {
  #layout { grid-template-columns: 1fr; }
  #chartPanel, #meritPanel, #plantsPanel, #logPanel { grid-column: 1; }
  #meritPanel { grid-row: 2; }
  #plantsPanel { grid-row: 3; }
  #logPanel { grid-row: 4; }
  .stat-block { margin-left: 0; }
}