:root {
  --ink: #14201c;
  --ink-soft: #2a3b34;
  --paper: #e8efe9;
  --paper-2: #d5e2d8;
  --mist: #f4f7f4;
  --teal: #0f766e;
  --teal-deep: #0a4f4a;
  --amber: #c45c26;
  --crit: #b42318;
  --high: #b54708;
  --ok: #1b7a4a;
  --line: rgba(20, 32, 28, 0.12);
  --shadow: 0 18px 50px rgba(20, 32, 28, 0.12);
  --font-display: "Outfit", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 4px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  background: var(--mist);
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-color: var(--mist);
  background-image:
    linear-gradient(rgba(15, 118, 110, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

.bg-glow {
  position: fixed;
  z-index: -1;
  width: 70vw;
  height: 50vh;
  top: -10vh;
  left: 15vw;
  background: radial-gradient(ellipse, rgba(15, 118, 110, 0.18), transparent 65%);
  pointer-events: none;
}

.hero {
  max-width: 920px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 2.5rem;
  text-align: left;
}

.sim-badge {
  display: inline-block;
  margin: 0 0 1.25rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--amber);
  color: var(--amber);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(196, 92, 38, 0.08);
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.8rem, 8vw, 4.6rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: var(--ink);
}

.tagline {
  max-width: 38rem;
  margin: 1.25rem 0 0;
  font-size: 1rem;
  color: var(--ink-soft);
  font-weight: 400;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  max-width: 40rem;
}

.hero-chips li {
  padding: 0.3rem 0.55rem;
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  color: var(--teal-deep);
  background: rgba(15, 118, 110, 0.1);
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: var(--radius);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.2rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--teal);
  color: #f5fffb;
}

.btn-primary:hover {
  background: var(--teal-deep);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--mist);
}

.workbench {
  max-width: 1180px;
  margin: 0 auto 3rem;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 900px) {
  .workbench {
    grid-template-columns: 1fr;
  }
}

.scenarios,
.stage {
  background: rgba(244, 247, 244, 0.85);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.scenarios {
  padding: 1.1rem;
  position: sticky;
  top: 1rem;
}

.scenarios h2,
.stage-head h2,
.chart-block h3,
.heatmap-wrap h3,
.alerts-wrap h3,
.train-panel h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
}

.aside-note {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.scenario-grid {
  display: grid;
  gap: 0.45rem;
}

.scenario {
  appearance: none;
  width: 100%;
  text-align: left;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: var(--radius);
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.scenario:hover {
  border-color: var(--teal);
}

.scenario.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #f5fffb;
}

.scenario-wide {
  margin-top: 0.35rem;
}

.train-panel {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.train-steps {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1.1rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.train-steps li {
  margin: 0.25rem 0;
}

.train-steps li.done {
  color: var(--ok);
}

.train-steps li.active {
  color: var(--teal-deep);
  font-weight: 600;
}

.train-bar {
  height: 6px;
  background: var(--paper-2);
  border-radius: 99px;
  overflow: hidden;
}

.train-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--teal), #2dd4bf);
  transition: width 0.35s ease;
}

.train-status {
  margin: 0.5rem 0 0;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.stage {
  padding: 1.15rem 1.2rem 1.4rem;
}

.stage-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.host-line {
  margin: 0.35rem 0 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.35rem;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(27, 122, 74, 0.2);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}

.pattern {
  margin: 0;
  font-size: 0.78rem;
  color: var(--teal-deep);
  align-self: center;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1rem;
}

.pill {
  display: inline-block;
  padding: 0.28rem 0.5rem;
  font-size: 0.68rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
}

.pill.ok {
  border-color: rgba(27, 122, 74, 0.35);
  color: var(--ok);
  background: rgba(27, 122, 74, 0.08);
}

.pill.warn {
  border-color: rgba(181, 71, 8, 0.4);
  color: var(--high);
  background: rgba(181, 71, 8, 0.08);
}

.pill.crit {
  border-color: rgba(180, 35, 24, 0.45);
  color: var(--crit);
  background: rgba(180, 35, 24, 0.08);
  animation: pulse 1.4s ease infinite;
}

.pill.muted {
  opacity: 0.85;
}

.charts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

@media (max-width: 700px) {
  .charts {
    grid-template-columns: 1fr;
  }
}

.chart-block {
  padding: 0.5rem 0.55rem 0.35rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.chart-block h3 {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 0.15rem;
}

.viz-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

@media (max-width: 800px) {
  .viz-row {
    grid-template-columns: 1fr;
  }
}

.heatmap-wrap,
.alerts-wrap {
  min-width: 0;
}

#heatmap {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  background: #0f1a17;
  border-radius: var(--radius);
  image-rendering: pixelated;
}

.heatmap-caption {
  margin: 0.4rem 0 0;
  font-size: 0.7rem;
  color: var(--ink-soft);
}

.like-tg {
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.alerts {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-height: 340px;
  overflow-y: auto;
  padding-right: 0.2rem;
}

.alert {
  padding: 0.7rem 0.8rem;
  border-left: 3px solid var(--teal);
  background: #fff;
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
  animation: slideIn 0.35s ease;
}

.alert.critical {
  border-left-color: var(--crit);
}

.alert.high {
  border-left-color: var(--high);
}

.alert.medium {
  border-left-color: var(--teal);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.68rem;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}

.alert-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  margin: 0 0 0.25rem;
}

.alert-body {
  margin: 0;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.alert-recon {
  margin: 0.4rem 0 0;
  padding: 0.35rem 0.45rem;
  background: var(--paper);
  font-size: 0.68rem;
  color: var(--ink);
}

.alert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.55rem;
}

.tg-btn {
  appearance: none;
  border: 1px solid rgba(15, 118, 110, 0.35);
  background: rgba(15, 118, 110, 0.08);
  color: var(--teal-deep);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.28rem 0.45rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tg-btn:hover {
  background: var(--teal);
  color: #f5fffb;
}

.tg-btn.clicked {
  background: var(--ink-soft);
  border-color: var(--ink-soft);
  color: #f5fffb;
}

.alert.empty {
  border-left-color: var(--line);
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3.5rem;
  border-top: 1px solid var(--line);
}

.footer p {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
}

.footer code {
  font-size: 0.85em;
  background: var(--paper);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--teal-deep);
  font-weight: 500;
}