:root {
  --bg: #111315;
  --bg-soft: #171a1d;
  --text: #f2f5f3;
  --text-dim: #a7b0aa;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.14);
  --line: rgba(255, 255, 255, 0.08);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Space Grotesk", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.bg-grid {
  display: none;
}

.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(17, 19, 21, 0.46);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 0.9rem 0.9rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.brand {
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand img {
  width: 44px;
  height: 44px;
  display: block;
}

.site-nav {
  display: flex;
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--text);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem 4rem;
}

.hero {
  padding: 4rem 0 2.4rem;
}

.hero-tight {
  padding-top: 3rem;
}

.kicker {
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  margin: 0.35rem 0 1rem;
  max-width: 14ch;
  line-height: 1.06;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-top: 0;
}

p {
  color: var(--text-dim);
  max-width: 68ch;
}

.hero p {
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
}

.btn {
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 600;
  padding: 0.68rem 1.1rem;
  transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #09120c;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.2), 0 10px 30px rgba(34, 197, 94, 0.32);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.panel,
.phase,
.cta {
  margin-top: 1.2rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.3rem;
}

.phase .phase-index {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-size: 0.98rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: #7ff0a8;
  text-shadow: 0 0 18px rgba(34, 197, 94, 0.35);
}

.pill-row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.pill-row span {
  border: 1px solid rgba(34, 197, 94, 0.3);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.34rem 0.7rem;
  font-size: 0.85rem;
}

.feature-list {
  margin: 0;
  padding-left: 1.05rem;
}

.feature-list li {
  margin-bottom: 0.55rem;
  color: #c2cac5;
}

.challenge-box {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}

.challenge-box p {
  margin: 0;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  padding: 0.7rem;
  color: #d7ddd9;
}

.challenge-box span,
.phase-index {
  font-family: "JetBrains Mono", monospace;
  color: var(--accent);
  font-size: 0.8rem;
  text-transform: uppercase;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--line);
}

footer p {
  margin: 0;
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 450ms ease, transform 450ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.toolbox-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.2rem;
}

.toolbox-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.3rem;
}

.toolbox-card h2 {
  margin-bottom: 0.8rem;
}

.tracking-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
  margin-top: 0.8rem;
}

.tracking-subhead {
  color: #d7ddd9;
  margin-bottom: 0.45rem;
}

.tracking-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(34, 197, 94, 0.1), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 14px 26px rgba(0, 0, 0, 0.2);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.tracking-card p {
  margin: 0;
}

.tracking-card .phase-index {
  margin-bottom: 0.4rem;
}

.tracking-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}

.tracking-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  right: -35px;
  top: -35px;
  border-radius: 50%;
  opacity: 0.32;
  pointer-events: none;
}

.tracking-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 197, 94, 0.4);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 18px 32px rgba(0, 0, 0, 0.25);
}

.track-foundation::after {
  background: radial-gradient(circle, rgba(34, 197, 94, 0.42) 0%, rgba(34, 197, 94, 0) 72%);
}

.track-passive::after {
  background: radial-gradient(circle, rgba(100, 116, 139, 0.42) 0%, rgba(100, 116, 139, 0) 72%);
}

.track-active::after {
  background: radial-gradient(circle, rgba(22, 163, 74, 0.42) 0%, rgba(22, 163, 74, 0) 72%);
}

.track-production::after {
  background: radial-gradient(circle, rgba(31, 41, 55, 0.52) 0%, rgba(31, 41, 55, 0) 72%);
}

.phase-chart-row {
  margin: 1rem 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.chart-wrap {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 0.5rem;
  flex-shrink: 0;
}

.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-legend {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.chart-legend li {
  color: #c2cac5;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.95rem;
}

.legend-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.legend-dot.foundation {
  background: #22c55e;
}

.legend-dot.active {
  background: #16a34a;
}

.legend-dot.passive {
  background: #64748b;
}

.legend-dot.production {
  background: #1f2937;
}

@media (min-width: 851px) {
  .site-header {
    justify-content: space-between;
    flex-wrap: nowrap;
  }

  .site-nav {
    width: auto;
    justify-content: flex-start;
  }

  .challenge-box {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }

  footer {
    flex-direction: row;
    justify-content: space-between;
  }

  .toolbox-grid {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .tracking-grid {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .phase-chart-row {
    align-items: flex-start;
  }
}

.brand {
  gap: 0.58rem;
}

.brand span {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--text);
  line-height: 1;
}

@media (max-width: 420px) {
  .brand span {
    font-size: 0.9rem;
    letter-spacing: 0.06em;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }
}