:root {
  --bg: #161616;
  --bg-soft: #1c1c1c;
  --panel: #202020;
  --line: #4d4d4d;
  --line-soft: #333333;
  --text: #f1f1f1;
  --muted: #9a9a9a;
  --accent: #17ebf2;
  --accent-soft: rgba(23, 235, 242, 0.18);
  --shadow: rgba(0, 0, 0, 0.28);
  --radius: 22px;
  --mono:
    "IBM Plex Mono", "Cascadia Mono", "SFMono-Regular", "Menlo", "Consolas",
    monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(23, 235, 242, 0.08), transparent 32%),
    linear-gradient(180deg, #171717 0%, #131313 100%);
  color: var(--text);
  font-family: var(--mono);
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: inherit;
}

.page {
  width: min(1160px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.topbar {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  border: 1px solid var(--line);
  background: rgba(20, 20, 20, 0.72);
  box-shadow: 0 18px 44px var(--shadow);
}

.brand,
.nav a {
  padding: 18px 22px;
  border-right: 1px solid var(--line);
  text-align: center;
}

.brand {
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.nav a:last-child {
  border-right: none;
}

.nav a {
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 32px;
  padding: 56px 0 42px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: lowercase;
}

.hero h1,
.section-head h2 {
  margin: 0;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(3rem, 8vw, 6rem);
}

.lede {
  max-width: 56ch;
  margin: 20px 0 0;
  color: #cfcfcf;
  font-size: 1.08rem;
  line-height: 1.75;
}

.command-card {
  width: fit-content;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 16px 36px var(--shadow);
}

.hero-commands {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.command-label {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
}

.command-card code {
  display: inline-block;
  padding: 6px 10px;
  background: var(--accent);
  color: #101010;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.loop-triangle {
  width: fit-content;
  margin-top: 22px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  font-size: 1rem;
  line-height: 1.2;
}

.loop-bank {
  color: var(--accent);
  font-weight: 700;
}

.loop-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.loop-mark-image {
  width: 30px;
  height: 30px;
  opacity: 0.92;
  filter: invert(1);
}

.loop-mark-reversed {
  display: inline-block;
  transform: scaleX(-1);
}

.button {
  display: inline-block;
  padding: 14px 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.button:hover {
  border-color: var(--text);
}

.button-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #111;
}

.hero-panel {
  border: 1px solid var(--line);
  background: rgba(19, 19, 19, 0.82);
  box-shadow: 0 22px 48px var(--shadow);
}

.panel-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
}

.panel-rail span {
  padding: 14px 16px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
}

.panel-rail span:last-child {
  border-right: none;
}

.panel-screen {
  margin: 0;
  padding: 18px 20px 22px;
  color: #d9d9d9;
  font-size: 0.96rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.preview-self {
  color: var(--accent);
  font-weight: 700;
}

.preview-resource {
  color: var(--accent);
}

.preview-danger {
  color: #ff7070;
}

.grid-section {
  padding: 34px 0 18px;
}

.section-head {
  margin-bottom: 20px;
}

.section-head h2 {
  font-size: clamp(2rem, 4vw, 3.1rem);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  min-height: 100%;
  padding: 22px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
}

.card h3 {
  margin: 0 0 14px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: #cbcbcb;
  line-height: 1.72;
}

.card pre {
  margin: 14px 0;
  padding: 14px 16px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: #151515;
}

.notice {
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  color: #dbffff;
}

@media (max-width: 980px) {
  .hero,
  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }

  .topbar {
    grid-template-columns: 1fr;
  }

  .brand {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .hero h1 {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100vw - 20px, 1160px);
    padding-top: 10px;
  }

  .nav {
    grid-template-columns: 1fr;
  }

  .nav a {
    border-right: none;
    border-top: 1px solid var(--line);
  }

  .panel-rail {
    grid-template-columns: 1fr 1fr;
  }

  .panel-rail span {
    border-bottom: 1px solid var(--line);
  }

  .panel-rail span:nth-child(2n) {
    border-right: none;
  }
}