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

html { scroll-behavior: smooth; scroll-padding-top: var(--space-9); }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-display);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Atmosphere layer: fixed so it never seams on long pages */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(ellipse 60% 40% at 75% 8%, var(--halo), transparent 70%),
    radial-gradient(ellipse 50% 35% at 10% 55%, var(--halo), transparent 70%),
    linear-gradient(180deg, var(--violet-950) 0%, var(--violet-900) 45%, var(--violet-850) 100%);
}

/* WebGL background (js/background.js) sits above the CSS fallback */
.bg-canvas { position: fixed; inset: 0; z-index: -1; width: 100%; height: 100%; pointer-events: none; opacity: var(--bg-effect-opacity); }

/* Liquid glass surface: inner light edges + distorted backdrop (SVG filter #container-glass, Chromium) */
.glass {
  background: var(--glass-tint);
  box-shadow: var(--glass-shadow);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: url(#container-glass) blur(var(--glass-blur));
}
.glass-filter { position: absolute; width: 0; height: 0; overflow: hidden; }
/* The fixed nav keeps blur + glass edges only: re-running the SVG distortion on every scroll frame is costly */
.nav.glass { backdrop-filter: blur(var(--glass-blur)); }

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }

/* Signature title: white sentence + coloured keywords, ends with a period */
.title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-2xl);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  max-width: 22ch;
}
.title em { font-style: normal; color: var(--accent); }
.title em.alt { color: var(--accent-strong); }

.section-head { margin-bottom: var(--space-8); }

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  border-radius: var(--radius-sm);
}
.skip-link:focus { top: var(--space-4); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.todo {
  display: inline-block;
  padding: 0 var(--space-2);
  border: var(--hairline) dashed var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-family: var(--font-label);
  font-size: var(--fs-xs);
}

/* Scroll reveal (light fade/slide) */
.reveal { opacity: 0; transform: translateY(var(--space-5)); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* Pricing toggle (SHOW_PRICING in js/config.js) */
.hide-pricing [data-pricing] { display: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
  .reveal { opacity: 1; transform: none; }
}