:root {
  --sg-bg: #000000;
  --sg-panel: #0d0d0d;
  --sg-text: #ffffff;
  --sg-muted: #bdbdbd;
  --sg-acid: #ccff28;
  --sg-border: rgba(204, 255, 40, 0.22);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--sg-bg);
  color: var(--sg-text);
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 400;
  line-height: 1.65;
}

body {
  min-height: 100vh;
}

.sg-page {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 56px 24px;
}

.sg-card {
  background: var(--sg-panel);
  border: 1px solid var(--sg-border);
  border-radius: 18px;
  padding: 40px 32px;
}

h1 {
  margin: 0 0 24px 0;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.1;
  font-weight: 700;
  color: var(--sg-acid);
  letter-spacing: -0.02em;
}

h2 {
  margin: 32px 0 14px 0;
  font-size: 1.3rem;
  line-height: 1.2;
  font-weight: 700;
  color: var(--sg-text);
}

p {
  margin: 0 0 16px 0;
  font-size: 1rem;
  color: var(--sg-text);
}

.sg-intro {
  font-size: 1.08rem;
}

.sg-highlight {
  color: var(--sg-acid);
  font-weight: 700;
}

.sg-divider {
  width: 100%;
  height: 1px;
  background: var(--sg-border);
  margin: 28px 0;
}

.sg-list {
  margin: 0;
  padding-left: 20px;
}

.sg-list li {
  margin-bottom: 10px;
}

.sg-nav {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.sg-nav a {
  color: var(--sg-acid);
  text-decoration: none;
  font-weight: 700;
}

.sg-nav a:hover {
  text-decoration: underline;
}

@media (max-width: 767px) {
  .sg-page {
    padding: 32px 16px;
  }

  .sg-card {
    padding: 28px 20px;
    border-radius: 14px;
  }

  h1 {
    margin-bottom: 20px;
  }
}