html,
body {
  height: 100%;
  min-height: 100dvh;
}

/* On mobile the responsive.css overrides height/overflow to lock to viewport */

body {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg-deep);
  overflow-x: hidden;
  line-height: 1.35;
}

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

.app-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 120% 80% at 50% -20%, rgba(50, 216, 230, 0.12), transparent 55%),
    radial-gradient(ellipse 90% 70% at 100% 60%, rgba(244, 193, 75, 0.08), transparent 50%),
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(255, 107, 53, 0.06), transparent 45%),
    linear-gradient(165deg, var(--color-bg-mid), var(--color-bg-deep) 55%);
}

/* Soft promo sparkles — lightweight, no images */
.app-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 246, 210, 0.09) 0 1px, transparent 2px),
    radial-gradient(circle, rgba(50, 216, 230, 0.08) 0 1px, transparent 2px);
  background-size: 72px 72px, 96px 96px;
  background-position: 0 0, 36px 18px;
  opacity: 0.55;
  mask-image: radial-gradient(ellipse 85% 70% at 50% 35%, black 0%, transparent 72%);
}

.app-backdrop__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.45;
}

.app-backdrop__glow--1 {
  width: 70vw;
  height: 70vw;
  max-width: 380px;
  max-height: 380px;
  top: -10%;
  left: -15%;
  background: rgba(255, 107, 53, 0.25);
}

.app-backdrop__glow--2 {
  width: 60vw;
  height: 60vw;
  max-width: 320px;
  max-height: 320px;
  bottom: 5%;
  right: -20%;
  background: rgba(50, 216, 230, 0.2);
}

/* Stylized floating coins — pure CSS */
.app-backdrop__coins::before,
.app-backdrop__coins::after {
  content: "";
  position: absolute;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 3px solid var(--color-gold-dark);
  background: radial-gradient(circle at 35% 35%, #fff6d0, var(--color-gold) 45%, var(--color-gold-dark) 100%);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35), inset 0 2px 4px rgba(255, 255, 255, 0.45);
  opacity: 0.35;
}

.app-backdrop__coins::before {
  left: 6%;
  bottom: 22%;
  transform: rotate(-12deg) scale(0.95);
}

.app-backdrop__coins::after {
  right: 8%;
  top: 28%;
  transform: rotate(18deg) scale(0.85);
}

.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: calc(var(--safe-top) + 0.5rem) 1rem calc(var(--safe-bottom) + 0.5rem);
  max-width: 28rem;
  margin: 0 auto;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}