.button { min-height: 2.75rem; display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: 0.65rem 1rem; border: 1px solid transparent; border-radius: var(--radius-md); font-weight: 700; line-height: 1.3; text-align: center; text-decoration: none; transition: background-color 160ms var(--ease-standard), border-color 160ms var(--ease-standard), color 160ms var(--ease-standard), transform 160ms var(--ease-standard); }
.button:hover { transform: translateY(-1px); }
.button--primary { background: var(--color-primary); color: var(--color-on-primary); box-shadow: var(--shadow-sm); }
.button--primary:hover { background: var(--color-primary-pressed); color: var(--color-on-primary); }
.button--secondary { border-color: var(--color-border-strong); background: var(--color-surface); color: var(--color-text); }
.button--secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }
.nav-link { min-height: 2.75rem; display: inline-flex; align-items: center; padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 650; text-decoration: none; }
.nav-link:hover { background: var(--color-surface-muted); color: var(--color-text); }
.nav-link[aria-current="page"] { color: var(--color-text); box-shadow: inset 0 -2px var(--color-accent); }
.mobile-menu-button { display: none; width: 2.75rem; height: 2.75rem; border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text); }
.mobile-menu-button span, .mobile-menu-button::before, .mobile-menu-button::after { display: block; width: 1.15rem; height: 2px; margin-inline: auto; background: currentColor; content: ""; transition: transform 160ms var(--ease-standard), opacity 160ms var(--ease-standard); }
.mobile-menu-button span { margin-block: 0.25rem; }
.mobile-menu-button[aria-expanded="true"]::before { transform: translateY(0.39rem) rotate(45deg); }
.mobile-menu-button[aria-expanded="true"] span { opacity: 0; }
.mobile-menu-button[aria-expanded="true"]::after { transform: translateY(-0.39rem) rotate(-45deg); }
.mobile-menu { display: none; }
.language-menu { position: relative; }
.language-menu summary { min-height: 2.75rem; display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 650; cursor: pointer; list-style: none; }
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu summary::after { width: 0.45rem; height: 0.45rem; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; content: ""; transform: translateY(-0.15rem) rotate(45deg); transition: transform 160ms var(--ease-standard); }
.language-menu[open] summary { background: var(--color-surface-muted); color: var(--color-text); }
.language-menu[open] summary::after { transform: translateY(0.15rem) rotate(225deg); }
.language-icon { color: var(--color-accent); font-size: 0.75rem; font-weight: 800; }
.language-options { position: absolute; top: calc(100% + 0.5rem); right: 0; z-index: 60; width: 11rem; margin: 0; padding: 0.35rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-md); list-style: none; }
.language-options a { min-height: 2.75rem; display: flex; align-items: center; justify-content: space-between; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); color: var(--color-text); font-size: var(--text-sm); text-decoration: none; }
.language-options a:hover { background: var(--color-surface-muted); }
.language-options a[aria-current="page"] { color: var(--color-accent); font-weight: 750; }
.language-options a[aria-current="page"]::after { content: "✓"; }
.not-found-nav { display: flex; align-items: center; gap: var(--space-2); }
.status-list { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0; padding: 0; list-style: none; }
.status-tag { display: inline-flex; align-items: center; gap: var(--space-2); min-height: 2rem; padding: var(--space-1) var(--space-3); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 650; }
.status-tag::before { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-accent); content: ""; }
.status-tag--ai::before { background: var(--color-ai); }
.feature-list { display: grid; gap: var(--space-6); margin: 0; padding: 0; list-style: none; }
.feature-item { padding-top: var(--space-4); border-top: 2px solid var(--color-border); }
.feature-item--accent { border-color: var(--color-accent); }
.feature-item--ai { border-color: var(--color-ai); }
.feature-item--brand { border-color: var(--color-primary-pressed); }
.feature-icon { width: 2.5rem; height: 2.5rem; display: inline-flex; align-items: center; justify-content: center; margin-bottom: var(--space-4); border-radius: var(--radius-lg); background: var(--color-bg-strong); color: var(--color-text); font-weight: 800; }
.feature-item h3 { margin-bottom: var(--space-2); font-size: var(--text-lg); }
.feature-item p { color: var(--color-text-muted); }
.screenshot-frame { overflow: hidden; border: 1px solid var(--color-border-strong); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-md); }
.screenshot-frame img { width: 100%; background: var(--color-bg-strong); }
.screenshot-frame figcaption { padding: var(--space-3) var(--space-4); border-top: 1px solid var(--color-border); color: var(--color-text-muted); font-size: var(--text-sm); }
.faq-list { display: grid; gap: var(--space-3); }
.faq-item { border-top: 1px solid var(--color-border-strong); }
.faq-item:last-child { border-bottom: 1px solid var(--color-border-strong); }
.faq-item summary { min-height: 3.5rem; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-3); color: var(--color-text); font-weight: 700; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon { position: relative; width: 1rem; height: 1rem; flex: 0 0 auto; color: var(--color-accent); }
.faq-icon::before, .faq-icon::after { position: absolute; top: 50%; left: 50%; width: 0.8rem; height: 2px; background: currentColor; content: ""; transform: translate(-50%, -50%); }
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] .faq-icon::after { display: none; }
.faq-answer { max-width: 44rem; padding-bottom: var(--space-4); color: var(--color-text-muted); }
.notice { padding: var(--space-4); border-left: 4px solid var(--color-warning); background: var(--color-warning-soft); color: var(--color-text); }
.notice strong { display: block; margin-bottom: var(--space-1); }
.prose { color: var(--color-text); }
.prose h2 { margin-top: var(--space-12); margin-bottom: var(--space-4); font-size: var(--text-xl); }
.prose h3 { margin-top: var(--space-8); margin-bottom: var(--space-3); font-size: var(--text-lg); }
.prose p, .prose li { max-width: 42rem; }
.prose li + li { margin-top: var(--space-2); }
.prose a { overflow-wrap: anywhere; }
.footer-links a, .feature-item > a, .footer-bottom a { min-height: 1.5rem; display: inline-flex; align-items: center; }
@media (max-width: 767.98px) {
  .button, .nav-link { min-height: 4.4rem; padding: 1rem 1.6rem; font-size: 1.4rem; }
  .mobile-menu-button { width: 4.4rem; height: 4.4rem; display: block; flex: 0 0 auto; }
  .mobile-menu-button span, .mobile-menu-button::before, .mobile-menu-button::after { width: 2rem; height: 0.2rem; }
  .mobile-menu-button span { margin-block: 0.55rem; }
  .mobile-menu-button[aria-expanded="true"]::before { transform: translateY(0.75rem) rotate(45deg); }
  .mobile-menu-button[aria-expanded="true"]::after { transform: translateY(-0.75rem) rotate(-45deg); }
  .mobile-menu { position: fixed; inset: var(--header-height) 0 auto; z-index: 45; display: grid; gap: 0.4rem; max-height: calc(100dvh - var(--header-height)); padding: 1.2rem 1.6rem 2.4rem; overflow-y: auto; border-bottom: 1px solid var(--color-border); background: var(--color-surface); box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(-1rem); transition: opacity 160ms var(--ease-standard), transform 160ms var(--ease-standard); }
  .mobile-menu[data-open="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
  .mobile-menu .nav-link { justify-content: flex-start; }
  .mobile-menu .language-menu { width: 100%; }
  .mobile-menu .language-menu summary { min-height: 4.4rem; display: flex; justify-content: space-between; padding: 1rem 1.6rem; font-size: 1.4rem; }
  .mobile-menu .language-icon { margin-right: auto; font-size: 1.2rem; }
  .mobile-menu .language-options { position: static; width: auto; margin: 0 1.6rem 0.8rem; border: 0; border-left: 2px solid var(--color-border); border-radius: 0; box-shadow: none; }
  .mobile-menu .language-options a { min-height: 4.4rem; padding: 0.8rem 1.6rem; font-size: 1.4rem; }
  .mobile-menu .button { margin-top: 0.8rem; }
  .status-list { gap: 0.8rem; }
  .status-tag { min-height: 3.2rem; padding: 0.4rem 1rem; font-size: 1.2rem; }
  .status-tag::before { width: 0.7rem; height: 0.7rem; }
  .feature-list { gap: 3.2rem; }
  .feature-item { padding-top: 1.6rem; }
  .feature-icon { width: 4rem; height: 4rem; margin-bottom: 1.6rem; }
  .feature-item h3 { margin-bottom: 0.8rem; font-size: 2rem; }
  .screenshot-frame figcaption { padding: 1.2rem 1.6rem; font-size: 1.3rem; }
  .faq-list { gap: 1.2rem; }
  .faq-item summary { min-height: 4.8rem; padding-block: 1.2rem; font-size: 1.5rem; }
  .faq-answer { padding-bottom: 1.6rem; }
  .notice { padding: 1.6rem; }
  .prose h2 { margin-top: 4.8rem; margin-bottom: 1.6rem; font-size: 2.2rem; }
  .prose h3 { margin-top: 3.2rem; margin-bottom: 1.2rem; font-size: 1.8rem; }
}
@media (min-width: 768px) { .mobile-menu { display: none !important; } }