:root {
  --font-sans: Roboto-Thin, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji", ui-sans-serif, -system-ui, -apple-system;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font: var(--font-sans);

  /* light theme */
  --bg: #200235;
  --text: #ffffff;
  --muted: #828282;
  --link: #ffffff;
  --hero-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
}

html {
  height: 100%;
}

body {
  box-sizing: border-box;
  margin: 0;
  padding-bottom: 48px;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100%;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--link);
}
a:hover {
  border-bottom: 0;
}

h1 {
  font-family: Roboto-Black;
  font-size: 3.25em;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  font-family: Roboto-Medium;
  font-size: 1.35em;
}

h3 { font-size: 1.15em; }

/* ── Layout ── */
.container {
  max-width: 960px;
  margin: 0 auto;
}

.content {
  margin: 48px auto;
  padding: 0 24px;
}

/* ── Header ── */
.site-header {
  position: relative;
  padding: 0 24px;
  background: var(--bg);
  margin: 0 auto;
  max-width: 960px;
  height: 60px;
}

.brand {
  position: absolute;
  top: 50%;
  left: 24px;
  height: 28px;
  margin-top: -14px;
  text-decoration: none;
  border-bottom: none;
}

.brand svg {
  height: 28px;
  width: auto;
}

.navigation-item {
  font-family: Roboto-Light;
  font-size: 1.25em;
  margin-right: 32px;
}

.hero h1 {
  margin: 72px 0;
  background: var(--hero-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Footer ── */
.site-footer {
  position: absolute;
  padding: 0;
  left: 24px;
  right: 24px;
  bottom: 0;
  height: 48px;
  color: var(--muted);
  max-width: 960px;
  font-size: 0.875em;
}

@media (min-width: 640px) {
  .hero h1 {
    font-size: 4em;
  }
}

/* ── Responsive ── */
@media (min-width: 960px) {
  .brand {
    left: 0;
  }
  .hero h1 {
    margin: 96px 0;
    text-align: center;
    font-size: 5.25em;
  }
  .site-header {
    padding: 0;
  }
  .content {
    padding: 0;
  }
  .navigation-item {
    font-size: 1.5em;
  }
}