.ab-welcome[hidden] { display: none; }

.nav__usage {
  min-height: 44px;
  padding: 0 8px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.nav__usage:hover { color: var(--ev-accent-2); }
.nav__usage:focus-visible { outline: 3px solid var(--ev-accent); outline-offset: 3px; border-radius: 6px; }

.ab-install {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin: 22px 0;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--ev-line-strong);
  border-radius: var(--r-lg, 18px);
  background: var(--ev-surface-2);
}
.ab-install h2 { margin: 0 0 8px; font-size: clamp(1.2rem, 3vw, 1.65rem); }
.ab-install p { margin: 0; color: var(--ev-text-2); line-height: 1.65; }
.ab-install__status { grid-column: 1 / -1; font-size: .85rem; }

.ab-welcome {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: var(--sp-6, 24px);
}

.ab-welcome__backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--ev-void) 76%, transparent);
  backdrop-filter: blur(10px);
}

.ab-welcome__dialog {
  position: relative;
  width: min(920px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  border: 1px solid var(--ev-line-strong);
  border-radius: var(--r-xl, 24px);
  background: color-mix(in srgb, var(--ev-deep) 94%, var(--ev-accent) 6%);
  box-shadow: 0 32px 90px color-mix(in srgb, var(--ev-void) 72%, transparent);
  padding: clamp(24px, 4vw, 44px);
  color: var(--ev-text);
}

.ab-light-shell .ab-welcome__backdrop {
  background: rgba(20, 35, 30, .52);
}

.ab-light-shell .ab-welcome__dialog {
  width: min(860px, 100%);
  padding: clamp(24px, 3vw, 36px);
  border-color: var(--ev-line-strong);
  background: #fff;
  box-shadow: 0 28px 80px rgba(17, 45, 37, .22);
  color: var(--ev-text);
}

.ab-light-shell .ab-welcome__x {
  border-color: var(--ev-line);
  background: var(--ev-surface-3);
  color: var(--ev-text);
}

.ab-welcome__x {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--ev-line-strong);
  border-radius: 50%;
  background: var(--ev-surface-2);
  color: var(--ev-text);
  font-size: 28px;
  cursor: pointer;
}

.ab-welcome__eyebrow {
  margin: 0 0 8px;
  color: var(--ev-accent-2);
  font-weight: 800;
  letter-spacing: .08em;
}

.ab-welcome h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.14;
}

.ab-welcome #ab-welcome-desc {
  margin: 12px 52px 22px 0;
  color: var(--ev-text-2);
  line-height: 1.7;
}

.ab-welcome__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--ev-line-strong);
  border-radius: var(--r-lg, 18px);
  background: var(--ev-void);
}

.ab-light-shell .ab-welcome__media {
  border-color: var(--ev-line-strong);
  border-radius: 16px;
  background: #e9f1ee;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.72);
}

.ab-welcome__media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ab-welcome__play {
  position: absolute;
  left: 50%;
  top: 50%;
  bottom: auto;
  transform: translate(-50%, -50%);
  min-height: 52px;
  padding: 0 24px;
  border: 0;
  border-radius: var(--r-pill, 999px);
  background: var(--ev-accent);
  color: var(--on-accent, white);
  box-shadow: 0 12px 34px color-mix(in srgb, var(--ev-accent) 42%, transparent);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.ab-light-shell .ab-welcome__play {
  border: 4px solid rgba(255,255,255,.9);
  box-shadow: 0 14px 36px rgba(8, 125, 106, .28);
}

.ab-welcome__play[hidden] { display: none; }
.ab-welcome__error { position: absolute; inset: auto 18px 18px; margin: 0; padding: 12px; border-radius: var(--r-md, 12px); background: color-mix(in srgb, var(--ev-void) 90%, transparent); color: var(--ev-text); text-align: center; }
.ab-welcome__error[hidden] { display: none; }

.ab-welcome__dismiss {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

.ab-welcome__dismiss button {
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--ev-text-2);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 4px;
  cursor: pointer;
}

.ab-light-shell .ab-welcome__dismiss button {
  color: var(--ev-text-2);
}

.ab-welcome__done {
  padding: 26px 12px 6px;
  text-align: center;
}

.ab-welcome__done p { margin: 0 0 18px; }
.ab-welcome--complete .ab-welcome__media,
.ab-welcome--complete .ab-welcome__dismiss { display: none; }
body.ab-welcome-open { overflow: hidden; }

@media (max-width: 640px) {
  .ab-install { grid-template-columns: 1fr; }
  .ab-install .btn { width: 100%; }
  .ab-welcome {
    align-items: end;
    padding: 0;
  }

  .ab-welcome__dialog {
    width: 100%;
    max-height: 88vh;
    border-radius: var(--r-xl, 24px) var(--r-xl, 24px) 0 0;
    padding: 28px 18px max(18px, env(safe-area-inset-bottom));
  }

  .ab-welcome__dialog::before {
    content: '';
    display: block;
    width: 48px;
    height: 5px;
    margin: -14px auto 18px;
    border-radius: var(--r-pill, 999px);
    background: var(--ev-line-strong);
  }

  .ab-welcome #ab-welcome-desc { margin-right: 36px; }
  .ab-welcome__play { top: auto; bottom: 16px; width: calc(100% - 32px); transform: translateX(-50%); }
  .ab-welcome__dismiss { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  .ab-welcome *, .ab-welcome *::before, .ab-welcome *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }
}