/* ==========================================================================
   NotaOne — Basis & reset
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-gutter: stable;
}

html:focus-within { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }
}

body {
  margin: 0;
  min-height: 100svh;
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--text-1);
  background: var(--bg-0);
  transition: background-color var(--dur-base) var(--ease-out-quart),
              color var(--dur-base) var(--ease-out-quart);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01" 1, "cv05" 1;
}

img, picture, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 650;
  color: var(--text-0);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
}

p { margin: 0; color: var(--text-2); }

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

button { cursor: pointer; }

ul, ol { margin: 0; padding: 0; list-style: none; }

label { display: inline-block; }

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

::selection {
  background: hsl(var(--brand-violet) / 0.32);
  color: var(--text-0);
}

/* Screen-reader only utility */
.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;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-md);
  z-index: var(--z-toast);
  background: var(--text-0);
  color: var(--bg-0);
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease-out-quart);
}
.skip-link:focus { top: var(--space-md); }

/* ---- Layout basics ------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--narrow { max-width: var(--container-narrow); }

.section {
  position: relative;
  padding-block: var(--space-3xl);
}

.section--tight { padding-block: var(--space-2xl); }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  font-size: var(--fs-2xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: transparent;
  background: var(--gradient-ai);
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gradient-ai);
  box-shadow: 0 0 12px hsl(var(--brand-violet) / 0.8);
}

.section-title {
  font-size: var(--fs-2xl);
  max-width: 20ch;
}

.section-head--center .section-title { max-width: none; margin-inline: auto; }

.section-desc {
  margin-top: var(--space-sm);
  font-size: var(--fs-md);
  color: var(--text-2);
  max-width: 52ch;
  line-height: var(--lh-relaxed);
}

.section-head--center .section-desc { margin-inline: auto; }

.text-gradient {
  color: transparent;
  background-image: var(--gradient-ai);
  background-clip: text;
  -webkit-background-clip: text;
}

.visually-hidden-until-scroll { will-change: transform, opacity; }

@media (max-width: 720px) {
  .section { padding-block: var(--space-2xl); }
}