* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--ui-bg);
  color: var(--ui-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
}

h1,
h2,
p {
  margin: 0;
}

.storage-choice-page {
  min-height: 100vh;
  min-height: 100svh;
  padding: 40px 20px;
  display: grid;
  place-items: center;
}

.storage-choice-shell {
  width: min(100%, 800px);
}

.storage-choice-header {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ui-border);
}

.storage-choice-brand {
  color: var(--ui-text-soft);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.storage-choice-intro {
  margin-top: 28px;
}

.storage-choice-intro h1 {
  font-size: 24px;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.storage-choice-intro p {
  margin-top: 8px;
  color: var(--ui-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.storage-options {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.storage-option {
  min-width: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--ui-border-strong);
  border-radius: 4px;
  background: var(--ui-surface);
  color: var(--ui-text);
  overflow-wrap: anywhere;
  transition: border-color 140ms ease, background-color 140ms ease, box-shadow 140ms ease;
}

.storage-option:focus-within {
  border-color: var(--ui-primary);
  background: var(--ui-surface-subtle);
  box-shadow: 0 3px 10px var(--ui-primary-ambient);
}

.storage-option-action:focus-visible,
.storage-recovery-link:focus-visible {
  outline: 3px solid var(--ui-focus);
  outline-offset: 3px;
}

.storage-option-title {
  font-size: 16px;
  font-weight: 650;
  line-height: 1.5;
}

.storage-option-features {
  display: grid;
  gap: 12px;
  margin: 16px 0;
  color: var(--ui-text-soft);
  font-size: 14px;
  line-height: 1.6;
}

.storage-option-features > div {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
}

.storage-option-features dt {
  color: var(--ui-text-muted);
}

.storage-option-features dd {
  margin: 0;
}

.storage-option-action {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  min-height: 44px;
  margin-top: auto;
  color: var(--ui-primary);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.5;
  text-underline-offset: 3px;
}

.storage-option-arrow {
  display: inline-block;
  margin-left: 4px;
  transition: transform 140ms ease;
}

.storage-option-action:hover .storage-option-arrow {
  transform: translateX(3px);
}

.storage-choice-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--ui-border);
}

.storage-choice-note {
  color: var(--ui-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.storage-recovery-link {
  min-height: 44px;
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  color: var(--ui-primary);
  font-size: 14px;
  line-height: 1.5;
  text-underline-offset: 3px;
}

.storage-recovery-link:hover {
  color: var(--ui-primary-hover);
}

@media (max-width: 680px) {
  .storage-choice-page {
    padding: 24px 16px;
    place-items: start center;
  }

  .storage-choice-intro {
    margin-top: 24px;
  }

  .storage-options {
    margin-top: 20px;
    grid-template-columns: minmax(0, 1fr);
  }

  .storage-option {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .storage-option,
  .storage-option-arrow {
    transition: none;
  }

  .storage-option-action:hover .storage-option-arrow {
    transform: none;
  }
}