/* ============================================================
   BASE — reset, typography, primitives, utilities.
   Loaded after tokens.css, before every section stylesheet.
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  color: var(--text-body);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv05" 1, "cv09" 1, "ss03" 1;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--text-strong);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); letter-spacing: var(--tracking-snug); }
h4 { font-size: var(--fs-h4); line-height: var(--lh-snug); letter-spacing: var(--tracking-snug); font-weight: var(--fw-semi); }

p { margin: 0; text-wrap: pretty; }
p + p { margin-top: var(--s-4); }

a { color: var(--c-brand); text-decoration: none; }
a:hover { color: var(--c-brand-hover); }

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

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

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

code, pre { font-family: var(--font-mono); font-size: var(--fs-sm); }

hr { border: 0; border-top: 1px solid var(--border); margin: 0; }

::selection { background: rgba(99,91,255,.18); color: var(--c-navy); }

:focus-visible {
  outline: 2px solid var(--c-brand);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}
:focus:not(:focus-visible) { outline: none; }

/* ---------------- Layout primitives ---------------- */

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: calc(var(--container-wide) + var(--gutter) * 2); }

.section { padding-block: var(--section-y); position: relative; }
.section--alt { background: var(--surface-alt); }
.section--dark { background: var(--surface-dark); color: var(--text-invert-body); }
.section--dark h1, .section--dark h2,
.section--dark h3, .section--dark h4 { color: var(--text-invert); }

.stack > * + * { margin-top: var(--s-5); }
.grid { display: grid; gap: var(--s-8); }

/* ---------------- Text primitives ---------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--c-brand);
  margin: 0;
}
.section--dark .eyebrow { color: var(--c-teal); }

.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-normal);
  color: var(--text-body);
}
.section--dark .lead { color: var(--text-invert-body); }

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

.measure { max-width: 62ch; }
.measure-sm { max-width: 48ch; }

/* ---------------- Buttons ---------------- */

.btn {
  --btn-bg: var(--c-brand);
  --btn-fg: var(--c-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  height: 44px;
  padding-inline: var(--s-5);
  border-radius: var(--r-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: var(--tracking-snug);
  white-space: nowrap;
  transition: background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}
.btn:hover { background: var(--c-brand-hover); color: var(--btn-fg); transform: translateY(-1px); box-shadow: var(--sh-brand); }
.btn:active { background: var(--c-brand-press); transform: translateY(0); box-shadow: none; }

.btn--lg { height: 52px; padding-inline: var(--s-7); font-size: var(--fs-body); }
.btn--sm { height: 36px; padding-inline: var(--s-4); font-size: var(--fs-xs); }

.btn--dark { --btn-bg: var(--c-navy); }
.btn--dark:hover { background: #143255; }
.btn--dark:active { background: #061c33; }

.btn--white { --btn-bg: var(--c-white); --btn-fg: var(--c-navy); }
.btn--white:hover { background: var(--c-white); color: var(--c-navy); box-shadow: var(--sh-lg); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--c-brand);
  box-shadow: inset 0 0 0 1px rgba(99,91,255,.28);
}
.btn--ghost:hover { background: var(--c-brand-tint); color: var(--c-brand); box-shadow: inset 0 0 0 1px rgba(99,91,255,.5); }

.btn--glass {
  --btn-bg: rgba(255,255,255,.14);
  --btn-fg: var(--c-white);
  backdrop-filter: blur(10px);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.24);
}
.btn--glass:hover { background: rgba(255,255,255,.24); color: var(--c-white); box-shadow: inset 0 0 0 1px rgba(255,255,255,.4); }

/* Arrow link — the Stripe signature "Learn more ›" */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  color: var(--c-brand);
  letter-spacing: var(--tracking-snug);
  transition: gap var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.arrow-link::after {
  content: "";
  width: 6px; height: 6px;
  border-right: 1.6px solid currentColor;
  border-top: 1.6px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease-out);
}
.arrow-link:hover { gap: var(--s-3); color: var(--c-brand-hover); }
.section--dark .arrow-link { color: var(--c-teal); }
.section--dark .arrow-link:hover { color: var(--c-lime); }

/* ---------------- Pills / badges ---------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  height: 28px;
  padding-inline: var(--s-3);
  border-radius: var(--r-pill);
  background: var(--c-brand-tint);
  color: var(--c-brand);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: var(--tracking-snug);
}

/* ---------------- Cards ---------------- */

.card {
  background: var(--surface);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  padding: var(--s-7);
  transition: transform var(--t-base) var(--ease-out), box-shadow var(--t-base) var(--ease-out);
}

/* ---------------- Scroll reveal (driven by assets/js/main.js) ---------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-slower) var(--ease-out),
              transform var(--t-slower) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------------- A11y helpers ---------------- */

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: var(--s-3); left: var(--s-3);
  z-index: var(--z-modal);
  padding: var(--s-3) var(--s-5);
  border-radius: var(--r-md);
  background: var(--c-navy);
  color: var(--c-white);
  font-size: var(--fs-sm); font-weight: var(--fw-semi);
  transform: translateY(-200%);
  transition: transform var(--t-base) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); color: var(--c-white); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}