:root {
  --color-background: #050816;
  --color-surface: rgba(21, 26, 46, 0.9);
  --color-surface-alt: rgba(12, 16, 32, 0.85);
  --color-surface-strong: rgba(255, 255, 255, 0.05);
  --color-text: #f5f8ff;
  --color-text-muted: rgba(229, 233, 255, 0.78);
  --color-text-subtle: rgba(229, 233, 255, 0.62);
  --color-accent: #f6b73c;
  --color-accent-soft: rgba(246, 183, 60, 0.18);
  --color-border: rgba(255, 255, 255, 0.12);
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --gradient-hero: radial-gradient(circle at 20% 20%, rgba(246, 183, 60, 0.25), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(72, 113, 248, 0.3), transparent 55%),
    linear-gradient(135deg, rgba(9, 12, 28, 0.95), rgba(5, 8, 22, 0.95));
  --shadow-soft: 0 24px 60px rgba(3, 6, 18, 0.65);
  --shadow-panel: 0 22px 45px rgba(3, 5, 15, 0.55);
  --radius-lg: 32px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container-width: min(1160px, 92vw);
  --topbar-offset: 104px;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

p {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 1rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}

ul {
  margin: 0 0 1.2rem 1.25rem;
  padding: 0;
  color: var(--color-text-muted);
}

li + li {
  margin-top: 0.45rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: var(--container-width);
  margin: 0 auto;
  /* ensure minimum horizontal breathing space inside container */
  padding-inline: 0.5rem;
}

@media (max-width: 720px) {
  :root {
    --topbar-offset: 84px;
  }
}

@media (max-width: 540px) {
  :root {
    --topbar-offset: 76px;
  }
}