/* === Shared CSS — extracted from all 4 pages === */

/* CSS Custom Properties */
:root {
  --mdui-color-primary: #00897b;
  --mdui-color-on-primary: #ffffff;
  --mdui-color-primary-container: #a7f3d0;
  --mdui-color-surface: #fdfcff;
  --mdui-color-surface-variant: #ece4e0;
}

/* Reset */
html, body { overflow-x: hidden; max-width: 100%; }
body { background: #f5f5f5; font-family: "Noto Sans SC", sans-serif; }

/* Page header (shared by photo, vr, credits) */
.page-header {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/background.webp') center/cover no-repeat;
  filter: brightness(0.45);
}
.page-header-content {
  position: relative;
  z-index: 1;
  color: #fff;
  padding: 2rem;
}
.page-header-content h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 2px;
}

/* Theme toggle (top-right) */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  overflow: visible;
  background: rgba(255,255,255,0.85);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  width: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mdui-theme-dark .theme-toggle {
  background: rgba(40,40,40,0.85);
}
.theme-dropdown mdui-menu {
  min-width: 160px;
}

/* Language toggle (top-right, left of theme) */
.lang-toggle {
  position: fixed;
  top: 1rem;
  right: 4rem;
  z-index: 1000;
  overflow: visible;
  background: rgba(255,255,255,0.85);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  width: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mdui-theme-dark .lang-toggle {
  background: rgba(40,40,40,0.85);
}
.lang-dropdown mdui-menu {
  min-width: 120px;
}
.theme-toggle mdui-button, .lang-toggle mdui-button { --mdui-button-padding-inline: 0; min-width: 0; width: 2.2rem; height: 2.2rem; }
.theme-toggle mdui-button::part(button), .lang-toggle mdui-button::part(button) { padding: 0; display: flex; align-items: center; justify-content: center; }

/* FAB navigation (bottom-right) */
.fab-nav {
  position: fixed;
  bottom: 1.5rem;
  right: 1rem;
  z-index: 1000;
  display: flex;
  gap: 0.25rem;
  background: rgba(255,255,255,0.85);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  padding: 0.25rem;
}
.mdui-theme-dark .fab-nav {
  background: rgba(40,40,40,0.85);
}

/* Footer */
.site-footer {
  background: #263238;
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  line-height: 2;
}
.site-footer a { color: #a7f3d0; text-decoration: none; }

/* Email reveal button (anti-crawler, captcha-protected) */
.email-reveal {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: #00897b;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}
.email-reveal--footer {
  color: #a7f3d0;
  text-decoration: none;
}
.email-reveal:hover { text-decoration-style: solid; }
.email-reveal:focus-visible { outline: 2px solid var(--mdui-color-primary); outline-offset: 2px; }

/* PlayCaptcha dialog — zoom set dynamically by JS on .captcha-container */
.captcha-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4px;
}

/* Dark mode overrides */
.mdui-theme-dark { --mdui-color-surface: #1c1b1f; --mdui-color-surface-variant: #49454f; overflow-x: hidden; }
.mdui-theme-dark body { background: #121212; }
.mdui-theme-dark .site-footer { background: #0d1117; }

/* Skip-to-content link (accessibility) */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--mdui-color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { top: 0; }

/* Responsive: shared elements */
@media (max-width: 600px) {
  .page-header-content h1 { font-size: 1.6rem; }
  .page-header { min-height: 25vh; }
  .site-footer { padding: 1.5rem 1rem; }
  .fab-nav { bottom: 1rem; right: 0.75rem; }
}