:root {
  --bg: #111111;
  --bg-2: #161616;
  --surface: #1c1c1c;
  --line: #2c2c2c;
  --text: #f3f3f3;
  --muted: #9aa0a0;
  --green: #37bd39;
  --blue: #127987;
  --red: #ff3b30;
  --max: 44rem;
  --wide: 58rem;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

a { color: var(--green); }
a:hover { color: #5fd85f; }

.wrap {
  width: min(var(--wide), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(17, 17, 17, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  display: block;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--green);
}

.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.hero img {
  width: 140px;
  height: auto;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
}

.lede {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
  padding: 0 0 2.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.15rem;
}

a.card {
  display: block;
  color: inherit;
  text-decoration: none;
}

a.card:hover {
  border-color: var(--green);
  color: inherit;
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--blue);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0 3rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  background: var(--green);
  color: #000;
  text-decoration: none;
  font-weight: 700;
  padding: 0.85rem 1.4rem;
  border-radius: 10px;
}

.btn:hover { color: #000; filter: brightness(1.08); }

.btn-ghost {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--green); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
}

.contact-btn {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: inherit;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  cursor: pointer;
}

.contact-btn:hover {
  color: var(--green);
  border-color: var(--green);
}

.download {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
  margin: 0 auto 1.5rem;
  width: min(22rem, calc(100% - 2rem));
}

.download-btn {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background: linear-gradient(to right, #00ffff, #00ff00);
  color: #000;
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 700;
  font-size: 1.05rem;
  border: 0;
  text-align: center;
}

a.download-btn:hover {
  color: #000;
  filter: brightness(1.08);
}

article {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3.5rem;
}

article h1 {
  font-size: clamp(1.7rem, 3.5vw, 2.2rem);
  margin: 0 0 0.4rem;
  line-height: 1.2;
}

article h2 {
  margin: 2rem 0 0.6rem;
  font-size: 1.25rem;
  color: var(--green);
}

article h3 {
  margin: 1.3rem 0 0.4rem;
  font-size: 1.02rem;
  color: var(--blue);
}

article p,
article li {
  color: #d8d8d8;
}

article ul {
  padding-left: 1.2rem;
}

.kicker {
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.35rem;
}

.toc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin: 1.2rem 0 1.6rem;
}

.toc strong { display: block; margin-bottom: 0.4rem; }
.toc a { display: block; padding: 0.18rem 0; text-decoration: none; }
.toc a:hover { text-decoration: underline; }

.callout {
  background: #132613;
  border: 1px solid var(--green);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin: 1.2rem 0;
}

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

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.8rem 0 1.2rem;
}

th, td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 0.4rem;
  vertical-align: top;
}

th { color: var(--muted); font-weight: 600; }

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
}

.steps li {
  counter-increment: step;
  margin: 0 0 0.85rem;
  padding-left: 2.2rem;
  position: relative;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.05rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--green);
  color: #000;
  font-size: 0.8rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}