/* =========================================================================
   BASE — Reset, typography defaults, aurora background, layout helpers.
   ========================================================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-weight: var(--fw-regular);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--text-dark);
  background-color: var(--gray-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Anchor offset so #checkout doesn't hide behind fixed nav */
section[id], [id].block { scroll-margin-top: 96px; }

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

button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

::selection { background: var(--primary); color: var(--white); }

/* Keyboard focus ring — accessibility requirement */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: var(--z-overlay);
  background: var(--primary);
  color: var(--white);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-semibold);
  transition: top var(--transition);
}
.skip-link:focus { top: 1rem; }

/* ----- Typography defaults -------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-dark);
  text-wrap: balance;
}

p { text-wrap: pretty; }

strong { font-weight: var(--fw-semibold); }
em { font-style: italic; }

/* ----- Layout primitives --------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

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

.block {
  position: relative;
  padding-block: var(--section-pad-y);
  z-index: var(--z-base);
}

/* Block surface variants — keep a SINGLE consistent background tone across the page.
   Instead of jumping between pure white and dark, use translucent layers over the aurora. */
.block--glass-soft { background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(246, 245, 251, 0.6) 100%); }
.block--glass-strong { background: linear-gradient(180deg, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.75) 100%); }
.block--tinted { background: linear-gradient(180deg, rgba(236, 234, 245, 0.65) 0%, rgba(246, 245, 251, 0.65) 100%); }
.block--deep { background: linear-gradient(180deg, var(--primary) 0%, var(--primary-700) 100%); color: var(--white); }
.block--deep h1, .block--deep h2, .block--deep h3, .block--deep h4 { color: var(--white); }

/* Section eyebrow (restraint: max 1 per 3 sections) */
.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--primary);
  margin-bottom: 1rem;
}

/* Lead / section intro paragraph */
.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
  max-width: 65ch;
}

/* Gradient text accent */
.text-gradient {
  background: linear-gradient(120deg, var(--primary) 0%, var(--magenta) 60%, var(--pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.text-yellow { color: var(--yellow); }

/* ===== Aurora ambient background =====
   Layered radial gradients that the liquid-glass surfaces blur against.
   Fixed, GPU-composited, drifts slowly. Pointer-events none. */
.aurora {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(60% 50% at 12% 18%, var(--aurora-1) 0%, transparent 60%),
    radial-gradient(55% 45% at 88% 12%, var(--aurora-4) 0%, transparent 55%),
    radial-gradient(70% 60% at 75% 88%, var(--aurora-2) 0%, transparent 60%),
    radial-gradient(50% 50% at 25% 85%, var(--aurora-3) 0%, transparent 55%),
    linear-gradient(180deg, #F6F5FB 0%, #ECEAF5 100%);
  background-attachment: fixed;
}

.aurora::before,
.aurora::after {
  content: '';
  position: absolute;
  width: 50vmax;
  height: 50vmax;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  will-change: transform;
}

.aurora::before {
  top: -10%;
  left: -10%;
  background: radial-gradient(circle, var(--primary-300), transparent 70%);
  animation: drift-1 24s var(--ease-in-out) infinite alternate;
}

.aurora::after {
  bottom: -15%;
  right: -10%;
  background: radial-gradient(circle, rgba(152, 18, 85, 0.7), transparent 70%);
  opacity: 0.55;
  animation: drift-2 32s var(--ease-in-out) infinite alternate;
}

/* Subtle noise overlay to break digital flatness */
.aurora .noise {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

@keyframes drift-1 {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(8vw, 6vh, 0) scale(1.15); }
}
@keyframes drift-2 {
  from { transform: translate3d(0, 0, 0) scale(1.1); }
  to   { transform: translate3d(-6vw, -4vh, 0) scale(1); }
}

/* Reduced motion: kill drift, keep static gradient */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .aurora::before, .aurora::after { animation: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}