/* ===== Simulation Screen ===== */
#screen-simulation.active {
  display: flex;
  flex-direction: column;
}

.sim-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 32px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.sim-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--cyan) 20%,
    var(--cyan) 80%,
    transparent
  );
  opacity: 0.3;
}

.sim-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sim-phase {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-transform: uppercase;
}

/* ===== Two-column body ===== */
.sim-body {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

/* Canvas (left) */
.sim-canvas {
  flex: 1;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  min-height: 0;
  min-width: 0;
}

#diagram-svg {
  width: 100%;
  height: 100%;
}

/* ===== Right Sidebar ===== */
.sim-sidebar {
  width: 320px;
  flex-shrink: 0;
  background: var(--bg-void);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sim-sidebar-section {
  border-bottom: 1px solid var(--border);
}

/* Metrics grid — 2x2 */
.sim-sidebar-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.sim-sidebar-metrics .sim-metric {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 10px 14px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transition: background 0.5s;
}

.sim-sidebar-metrics .sim-metric:nth-child(2n) {
  border-right: none;
}

.sim-metric.sm-warn { background: rgba(255, 184, 0, 0.05); }
.sim-metric.sm-bad { background: rgba(255, 59, 59, 0.08); }
.sim-metric.sm-dead { background: rgba(255, 59, 59, 0.14); }

.sim-metric .sm-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.sim-metric .sm-val {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  transition: color 0.5s;
  line-height: 1.1;
}

.sim-metric.sm-warn .sm-val { color: var(--yellow); }
.sim-metric.sm-bad .sm-val { color: var(--red); }
.sim-metric.sm-dead .sm-val { color: var(--red); text-shadow: 0 0 10px var(--red-glow); }

.sim-metric .sm-status {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-top: 2px;
  transition: color 0.5s;
}

.sm-status.ss-ok { color: var(--green); }
.sm-status.ss-warn { color: var(--yellow); }
.sm-status.ss-bad { color: var(--red); }
.sm-status.ss-dead { color: var(--red); animation: pulse-timer 1s ease-in-out infinite; }

/* Graph panel */
.sim-sidebar-graph {
  padding: 8px 12px;
  position: relative;
}

.sim-graph-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.sim-svg-graph {
  width: 100%;
  height: 80px;
  background: transparent;
  border: none;
  display: block;
}

/* Event log in sidebar */
.sim-sidebar-log {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  border-bottom: none;
}

.sim-sidebar-log-header {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  padding: 8px 14px 4px;
  border-bottom: 1px solid var(--border);
}

.sim-sidebar-log .sim-event-log-inline {
  flex: 1;
  overflow-y: auto;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
}

/* Scrollbar */
.sim-event-log-inline::-webkit-scrollbar {
  width: 4px;
}
.sim-event-log-inline::-webkit-scrollbar-track {
  background: transparent;
}
.sim-event-log-inline::-webkit-scrollbar-thumb {
  background: var(--border);
}

.event-line {
  display: flex;
  gap: 10px;
  animation: log-in 0.4s ease;
}

@keyframes log-in {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

.event-time {
  color: var(--text-muted);
  min-width: 42px;
  font-weight: 600;
  flex-shrink: 0;
}

.event-text {
  color: var(--text-secondary);
}

.event-text.event-bad { color: var(--red); text-shadow: 0 0 8px var(--red-glow); }
.event-text.event-good { color: var(--green); text-shadow: 0 0 8px var(--green-glow); }
.event-text.event-warn { color: var(--yellow); text-shadow: 0 0 8px var(--yellow-glow); }
.event-text.event-info { color: var(--cyan); text-shadow: 0 0 8px var(--cyan-glow); }

/* ===== Legacy event panel (hidden) ===== */
.sim-event-panel {
  display: none;
}

/* Controls */
.sim-controls {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 14px 32px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  position: relative;
  flex-shrink: 0;
}

.sim-controls::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--border-cyan) 30%,
    var(--border-cyan) 70%,
    transparent
  );
}

/* ===== Timeline ===== */
.sim-timeline {
  padding: 10px 32px 8px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.timeline-track {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 0;
  position: relative;
  overflow: visible;
}

.timeline-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--yellow), var(--red));
  width: 0%;
  transition: width 0.3s linear;
}

.timeline-marker {
  position: absolute;
  top: -6px;
  left: 0%;
  width: 16px;
  height: 16px;
  background: var(--red);
  border: 2px solid var(--bg-secondary);
  transform: translateX(-50%) rotate(45deg);
  transition: left 0.3s linear;
  z-index: 2;
  box-shadow: 0 0 10px var(--red-glow);
}

.timeline-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
}

.timeline-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ===== Center Toast ===== */
.sim-toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  pointer-events: none;
}

.toast-msg {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 18px 40px;
  background: rgba(5, 8, 14, 0.92);
  border: 2px solid var(--cyan);
  text-align: center;
  max-width: 600px;
  animation: toast-in 0.5s ease, toast-out 0.5s ease 2.5s forwards;
  backdrop-filter: blur(12px);
}

.toast-msg.toast-bad {
  color: var(--red);
  border-color: var(--red);
  box-shadow: 0 0 40px var(--red-glow), inset 0 0 40px rgba(255, 59, 59, 0.05);
}

.toast-msg.toast-good {
  color: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 40px var(--green-glow), inset 0 0 40px rgba(0, 230, 118, 0.05);
}

.toast-msg.toast-warn {
  color: var(--yellow);
  border-color: var(--yellow);
  box-shadow: 0 0 40px var(--yellow-glow), inset 0 0 40px rgba(255, 184, 0, 0.05);
}

.toast-msg.toast-info {
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 40px var(--cyan-glow), inset 0 0 40px rgba(0, 240, 255, 0.05);
}

@keyframes toast-in {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes toast-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ===== Decision Point Card ===== */
.sim-decision {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  pointer-events: none;
  width: 90%;
  max-width: 580px;
}

.sim-decision.active {
  pointer-events: auto;
}

.decision-card {
  background: rgba(5, 8, 14, 0.95);
  border: 1px solid var(--border-cyan);
  padding: 24px 28px 20px;
  backdrop-filter: blur(16px);
  animation: decision-in 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.decision-card.fade-out {
  animation: decision-out 0.4s ease forwards;
}

@keyframes decision-in {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes decision-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-12px); }
}

.decision-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 16px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.decision-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.decision-opt {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s, opacity 0.4s;
}

.decision-opt:hover {
  border-color: var(--cyan-dim);
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.decision-opt.opt-cyan { border-left: 3px solid var(--cyan); }
.decision-opt.opt-red { border-left: 3px solid var(--red); }
.decision-opt.opt-yellow { border-left: 3px solid var(--yellow); }
.decision-opt.opt-green { border-left: 3px solid var(--green); }

/* After choice: highlight correct, dim wrong */
.decision-opt.correct {
  border-color: var(--green);
  background: rgba(0, 230, 118, 0.08);
  color: var(--green);
  box-shadow: 0 0 16px var(--green-glow);
  cursor: default;
}

.decision-opt.wrong {
  opacity: 0.3;
  cursor: default;
}

.decision-opt.chosen {
  border-color: var(--yellow);
}

.decision-result {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 14px;
  padding: 10px 14px;
  border-left: 2px solid var(--cyan-dim);
  background: var(--cyan-subtle);
  line-height: 1.5;
  animation: decision-in 0.3s ease;
}