* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --line: rgba(0, 0, 0, 0.1);
  --muted: rgba(0, 0, 0, 0.4);
}

html {
  font-size: 16px;
}

body {
  font-family:
    'Geist', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: #fff;
  color: #000;
  line-height: 1.5;
}

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

main {
  min-height: 100vh;
  max-width: 42rem;        /* max-w-2xl */
  margin: 0 auto;
  padding: 4rem 1.5rem;    /* py-16 px-6 */
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 5rem;     /* mb-20 */
}

h1 {
  font-size: 1.5rem;       /* text-2xl */
  line-height: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em; /* tracking-tight */
}

.header-text p {
  margin-top: 0.5rem;      /* mt-2 */
  font-size: 0.875rem;     /* text-sm */
  line-height: 1.25rem;
  color: var(--muted);
}

.download-link {
  flex-shrink: 0;
  margin-top: 0.1875rem;
  font-size: 0.875rem;     /* text-sm */
  line-height: 1.25rem;
  color: rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  transition: color 0.2s;
}

.download-link:hover {
  color: rgba(0, 0, 0, 0.6);
}

.intro {
  margin-bottom: 1.5rem;
  font-size: 0.875rem;     /* text-sm */
  line-height: 1.25rem;
  color: var(--muted);
  word-break: keep-all;
}

ul.feature-list {
  flex: 1;
  list-style: none;
  border-top: 1px solid var(--line);
}

ul.feature-list li + li {
  margin-top: 1px;         /* space-y-px */
}

.feature-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;       /* py-6 */
  border-bottom: 1px solid var(--line);
  transition: border-color 0.2s;
}

.feature-item:hover {
  border-color: rgba(0, 0, 0, 0.3);
}

.feature-title {
  font-size: 1rem;         /* default body size */
  line-height: 1.5rem;
  font-weight: 500;        /* font-medium */
  color: #000;
  transition: color 0.2s;
}

.feature-item:hover .feature-title {
  color: rgba(0, 0, 0, 0.7);
}

.feature-desc {
  margin-top: 0.25rem;     /* mt-1 */
  font-size: 0.875rem;     /* text-sm */
  line-height: 1.25rem;
  color: var(--muted);
  word-break: keep-all;
}

footer {
  margin-top: 5rem;        /* mt-20 */
  font-size: 0.75rem;      /* text-xs */
  line-height: 1rem;
  color: rgba(0, 0, 0, 0.2);
}

@media (max-width: 640px) {
  main {
    padding: 3rem 1rem;
  }

  header {
    margin-bottom: 3.75rem;
  }
}