:root {
  --bg: #0e1117;
  --bg-box: #1a2030;
  --border: #2d3748;
  --text: #e5e7eb;
  --accent: #21c55d;
  --link: #3b82f6;
  --tip: #fbbf24;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 2rem;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

main {
  max-width: 900px;
  margin: 5vh auto;
  text-align: center;
}

h1 {
  font-size: 2rem;
  color: var(--accent);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.callout {
  margin-top: 2rem;
  padding: 1.5rem 1.8rem;
  background: rgba(33, 197, 93, 0.08);
  border: 2px solid var(--accent);
  border-radius: 10px;
  text-align: left;
  box-shadow: 0 0 24px rgba(33, 197, 93, 0.15);
}

.callout p {
  margin: 0.6rem 0;
}

.callout-title {
  margin-top: 0 !important;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.info-box {
  margin-top: 2rem;
  padding: 1.2rem 1.5rem;
  background: var(--bg-box);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: left;
  font-size: 0.95rem;
}

.info-box p {
  margin: 0.5rem 0;
}

.tip {
  margin-top: 0.8rem;
  color: var(--tip);
  font-size: 0.9rem;
}

.logos {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.logos img {
  height: 3rem;
  width: auto;
  opacity: 0.85;
  transition: opacity 0.2s;
}

.logos a:hover img,
.logos a:focus-visible img {
  opacity: 1;
}