:root {
  color-scheme: dark;
  --bg: #08100f;
  --panel: #101c1a;
  --panel-2: #142623;
  --ink: #f4fbf4;
  --muted: #abc2ba;
  --line: #29433c;
  --mint: #9cffc7;
  --cyan: #78e9ff;
  --amber: #ffd166;
  --coral: #ff8f70;
  --shadow: rgba(0, 0, 0, .34);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(rgba(120, 233, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 233, 255, .035) 1px, transparent 1px),
    radial-gradient(circle at 18% 0%, rgba(156, 255, 199, .18), transparent 32%),
    radial-gradient(circle at 85% 20%, rgba(255, 209, 102, .12), transparent 30%),
    var(--bg);
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
}

main {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 54px;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 42px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 950;
  letter-spacing: -.02em;
}

.mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid #3d675c;
  border-radius: 10px;
  color: #06110d;
  background: linear-gradient(135deg, var(--mint), var(--cyan));
  box-shadow: 0 16px 40px rgba(120, 233, 255, .16);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

a {
  color: inherit;
}

.nav-links a,
.button {
  appearance: none;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 11px 14px;
  background: #0d1717;
  color: var(--ink);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.button.primary {
  color: #05110b;
  background: var(--mint);
  border-color: var(--mint);
}

.button.secondary {
  background: #13211f;
}

.hero {
  display: grid;
  grid-template-columns: 1fr .95fr;
  gap: 22px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.control-card,
.mission-card,
.sim-card,
.coach-card,
.impact,
.build-card {
  border: 1px solid var(--line);
  background: rgba(16, 28, 26, .88);
  border-radius: 14px;
  box-shadow: 0 24px 80px var(--shadow);
}

.hero-copy {
  padding: clamp(28px, 5vw, 52px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 12px;
  font-weight: 950;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -.045em;
}

h1 {
  max-width: 720px;
  font-size: clamp(48px, 8vw, 94px);
  line-height: .9;
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
}

.lede,
p {
  color: var(--muted);
  line-height: 1.6;
}

.lede {
  max-width: 680px;
  margin: 24px 0;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-panel {
  overflow: hidden;
  align-self: stretch;
}

.panel-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #0b1514;
}

.panel-top span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--coral);
}

.panel-top span:nth-child(2) {
  background: var(--amber);
}

.panel-top span:nth-child(3) {
  background: var(--mint);
}

.panel-top strong {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

pre {
  margin: 0;
  padding: 20px;
  overflow: auto;
  color: #dcfff0;
  font-size: 14px;
  line-height: 1.65;
}

.lab-grid,
.sim-section {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 18px;
  margin-top: 22px;
}

.control-card,
.mission-card,
.sim-card,
.coach-card,
.impact,
.build-card {
  padding: 22px;
}

label {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  color: var(--ink);
  font-weight: 850;
}

select,
textarea,
input[type="range"] {
  width: 100%;
}

select,
textarea {
  border: 1px solid #355a50;
  border-radius: 10px;
  background: #0a1513;
  color: var(--ink);
  padding: 12px;
  font: inherit;
}

textarea {
  min-height: 110px;
  resize: vertical;
}

.status {
  min-height: 24px;
  color: var(--amber);
  font-weight: 900;
}

.mission-head {
  margin-bottom: 16px;
}

.callout {
  border: 1px solid #33594f;
  background: #0b1715;
  border-radius: 11px;
  padding: 14px;
  margin-top: 12px;
}

.callout strong {
  color: var(--mint);
}

.callout.warning strong {
  color: var(--amber);
}

.stages,
.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.stage,
.impact-grid article {
  border: 1px solid var(--line);
  background: #0c1716;
  border-radius: 11px;
  padding: 14px;
}

.stage strong,
.impact-grid strong {
  color: var(--mint);
}

.sim-section {
  grid-template-columns: 1.2fr .8fr;
}

.sim-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

canvas {
  width: 100%;
  height: auto;
  border: 1px solid #31554c;
  border-radius: 12px;
  background: #06100f;
}

.sliders {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 14px;
}

input[type="range"] {
  accent-color: var(--mint);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.metric {
  border: 1px solid var(--line);
  background: #0b1715;
  border-radius: 10px;
  padding: 12px;
}

.metric small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 950;
  margin-bottom: 5px;
}

.metric strong {
  color: var(--mint);
}

.feedback {
  margin-top: 14px;
  border: 1px solid #355a50;
  border-radius: 11px;
  padding: 14px;
  background: #0b1715;
  color: #def8ed;
  line-height: 1.55;
}

.impact {
  margin-top: 22px;
}

.impact {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 18px;
  align-items: start;
}

.build-card {
  margin-top: 22px;
}

.hidden {
  display: none;
}

.input-helper-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
  margin-bottom: 12px;
}

#voiceBtn {
  align-self: flex-start;
  padding: 8px 12px;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

#voiceBtn.listening {
  background: var(--coral) !important;
  color: #05110b !important;
  animation: voicePulse 1.5s infinite;
  border-color: var(--coral) !important;
}

@keyframes voicePulse {
  0% { opacity: 0.8; }
  50% { opacity: 1; transform: scale(1.02); }
  100% { opacity: 0.8; }
}

.helper-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  font-size: 12px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--mint);
  padding: 6px 10px;
  border-radius: 20px;
  cursor: pointer;
  user-select: none;
  transition: all 0.2s ease;
  font-weight: 600;
}

.chip:hover {
  background: var(--mint);
  color: #06100f;
  border-color: var(--mint);
  transform: translateY(-1px);
}

@media (max-width: 940px) {
  .hero,
  .lab-grid,
  .sim-section,
  .impact {
    grid-template-columns: 1fr;
  }

  .stages,
  .impact-grid,
  .sliders,
  .metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  main {
    width: min(100vw - 24px, 1180px);
    padding-top: 18px;
  }

  nav {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 {
    font-size: 44px;
  }
}

/* Premium UX Styles */
.sim-actions {
  display: flex;
  gap: 8px;
}

.slider-value {
  color: var(--mint);
  font-weight: 800;
  margin-left: 2px;
}

.stage {
  position: relative;
  transition: all 0.3s ease;
}

.stage.pending {
  opacity: 0.5;
  border-color: rgba(41, 67, 60, 0.4);
}

.stage.active {
  opacity: 1;
  border-color: var(--mint);
  box-shadow: 0 0 12px rgba(156, 255, 199, 0.25);
  background: var(--panel-2);
  transform: translateY(-2px);
}

.stage.active strong::after {
  content: " ● In Progress";
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.05em;
  font-weight: 900;
  margin-left: 6px;
  animation: pulseText 1.5s infinite;
}

.stage.completed {
  opacity: 1;
  border-color: var(--cyan);
  background: rgba(16, 38, 32, 0.4);
}

.stage.completed strong::after {
  content: " ✓ Done";
  color: var(--mint);
  font-size: 11px;
  font-weight: 900;
  margin-left: 6px;
}

@keyframes pulseText {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}