:root {
  --bg: #191d26;
  --surface: #2e3345;
  --surface-soft: rgba(46, 51, 69, 0.5);
  --text: #f2f2f2;
  --muted: rgba(255, 255, 255, 0.6);
  --border: rgba(255, 255, 255, 0.08);
  --accent: #5dade2;
  --accent-strong: #4a9bd0;
  --good: #4cd964;
  --max-width: 760px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
}

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

a:hover,
a:focus-visible {
  color: var(--accent-strong);
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background-color: rgba(25, 29, 38, 0.92);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.2px;
  color: var(--text);
}

.brand:hover,
.brand:focus-visible {
  color: var(--text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.site-nav a {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background-color: var(--surface-soft);
  color: var(--text);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  background-color: var(--surface-soft);
  color: var(--text);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.page-title {
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0 0 24px;
}

.intro {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 28px;
}

section {
  margin-top: 32px;
}

section h2 {
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: -0.2px;
}

section p {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 12px;
}

section ul {
  padding-left: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

section ul li {
  margin-bottom: 6px;
}

.callout {
  border: 1px solid var(--border);
  background-color: var(--surface-soft);
  border-radius: 14px;
  padding: 18px 20px;
  margin-top: 32px;
}

.callout p {
  margin: 0;
  color: var(--text);
}

footer.page-footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--good) 100%);
  color: #0d1117;
  font-weight: 600;
  font-size: 16px;
  padding: 14px 22px;
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  transition: transform 80ms ease, opacity 80ms ease;
}

.button:hover,
.button:focus-visible {
  text-decoration: none;
  color: #0d1117;
  opacity: 0.92;
}

.button:active {
  transform: scale(0.985);
}

.help-card {
  margin-top: 24px;
  padding: 28px;
  background-color: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 18px;
  text-align: center;
}

.help-card h2 {
  margin-top: 0;
  font-size: 22px;
  font-weight: 600;
}

.help-card p {
  color: var(--muted);
  margin-bottom: 20px;
}

.email-fallback {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.email-fallback a {
  color: var(--muted);
  text-decoration: underline;
}