.install-guide {
  box-sizing: border-box;
  width: min(1040px, calc(100% - 48px));
  max-width: none;
  max-height: calc(100dvh - 48px);
  margin: auto;
  padding: 44px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid #39363f;
  border-radius: 28px;
  background: #171719;
  color: #f5f4f7;
  font-family: Inter, sans-serif;
  box-shadow: 0 32px 100px #0009;
  color-scheme: dark;
}

.install-guide::backdrop {
  background: rgb(0 0 0 / 65%);
  backdrop-filter: blur(8px);
}

html.install-guide-open { overflow: hidden; }

.install-guide__close {
  position: absolute;
  top: 22px;
  right: 22px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 10px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: background 150ms ease;
}

.install-guide__close img { width: 20px; height: 20px; filter: invert(1); opacity: .65; }
.install-guide__close:hover { background: #ffffff12; }
.install-guide__close:hover img { opacity: 1; }
.install-guide :focus-visible { outline: 2px solid #b498ff; outline-offset: 5px; }
.install-guide__eyebrow { margin: 0 48px 12px 0; color: #b498ff; font-size: 11px; font-weight: 700; letter-spacing: .14em; }
.install-guide__title { margin: 0 24px 18px 0; font-size: clamp(25px, 3vw, 34px); font-weight: 700; letter-spacing: -.04em; line-height: 1.2; color: inherit; }
.install-guide__intro { margin: 0; max-width: 800px; color: #b5b2bd; font-size: 15px; line-height: 1.7; }
.install-guide__retry { color: #f5f4f7; font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }
.install-guide__retry:hover { color: #c4afff; }
.install-guide__steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; margin: 32px 0 28px; padding: 0; list-style: none; }
.install-guide__art { display: block; width: 100%; aspect-ratio: 30 / 19; object-fit: cover; border: 1px solid #353239; border-radius: 17px; background: #232226; }
.install-guide__step-number { display: block; margin: 19px 0 7px; color: #94909e; font-size: 11px; font-weight: 600; letter-spacing: .16em; }
.install-guide__step-title { margin: 0 0 10px; font-size: 21px; font-weight: 650; line-height: 1.3; color: inherit; }
.install-guide__step-copy { margin: 0; color: #b5b2bd; font-size: 14px; line-height: 1.7; }
.install-guide__step-copy strong { color: #dfdce6; font-weight: 500; }
.install-guide__note { margin: 0; padding-top: 21px; border-top: 1px solid #ffffff12; color: #94909e; font-size: 12px; line-height: 1.7; }

@media (max-width: 640px) {
  .install-guide { width: calc(100% - 24px); max-height: calc(100dvh - 24px); padding: 28px 22px 24px; border-radius: 22px; }
  .install-guide__close { top: 10px; right: 10px; }
  .install-guide__eyebrow { font-size: 10px; margin-bottom: 13px; }
  .install-guide__title { margin-right: 10px; max-width: 270px; font-size: 27px; }
  .install-guide__intro { font-size: 14px; }
  .install-guide__steps { grid-template-columns: 1fr; gap: 24px; margin: 25px 0; }
  .install-guide__step { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 0 16px; align-items: start; }
  .install-guide__art { grid-row: 1 / 4; aspect-ratio: 1; object-fit: contain; }
  .install-guide__step-number { margin: 0 0 5px; font-size: 10px; }
  .install-guide__step-title { font-size: 19px; margin-bottom: 6px; }
  .install-guide__step-copy { font-size: 13px; line-height: 1.6; }
}

@media (max-width: 380px) {
  .install-guide { padding-inline: 18px; }
  .install-guide__step { grid-template-columns: 88px minmax(0, 1fr); column-gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .install-guide__close { transition: none; }
}