@view-transition {
  navigation: auto;
}

:root {
  --brand-bg: #a19f9f;
  --text-main: #000;
  --text-muted: #333;
  --foot-bg: #f3f3f3;
  --radius: 8px;

  --font-body: "Montserrat", "Noto Sans SC", "PingFang SC",
               "Microsoft YaHei UI", "Segoe UI", Roboto, sans-serif;
}

html {
  font-family: var(--font-body,
    "Montserrat", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei UI", "Segoe UI", Roboto, sans-serif
  );
  line-height: 1.6;
  color: var(--page-ink, #000);  
}

* { box-sizing: border-box; margin: 0; padding: 0; }
img, svg { max-width: 100%; height: auto; display: block; }

.site-nav {
  background: var(--brand-bg, #a19f9f);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
  gap: 0.5rem;

  .brand {
    font-weight: 700;
    color: var(--text-main, #000);
    text-decoration: none;
    font-size: 1.2rem;
  }

  .menu summary {
    cursor: pointer;
    font-size: 1.6rem;
    line-height: 1;
    user-select: none;
    background: none;
    border: none;
    list-style: none;
    outline: none;
  }

  .menu summary::-webkit-details-marker { display: none; }

  menu-items {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    position: absolute;
    right: 1rem;
    top: calc(100% + 0.4rem);
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius, 6px);
    background: #fff;
    border: 1px solid #d0d7de;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.1);

    a {
      color: #111;
      text-decoration: none;
      font-weight: 600;
      &:hover,
      &:focus-visible {
        text-decoration: underline;
      }
    }
  }
}

.site-nav .menu {
  position: relative;
  margin-left: auto; 
}

.site-nav .menu summary {
  margin-left: auto;   
  display: flex;
  justify-content: flex-end;
  cursor: pointer;
}

.site-nav .theme-toggle {
  margin-left: 0.5rem; 
}

.site-nav .theme-toggle {
  margin-left: 0.75rem;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.15);
  background: #fff;
  color: #111;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.site-nav .theme-toggle-icon {
  font-size: 1rem;
}

.site-nav .theme-toggle:hover,
.site-nav .theme-toggle:focus-visible {
  background: #f3f4f6;
  box-shadow: 0 4px 10px rgba(0,0,0,0.22);
  outline: none;
}

@media (min-width: 1025px) {
  .site-nav menu-items {
    position: static;
    flex-direction: row;
    gap: 1.2rem;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;

    a { color: var(--text-main, #000); }
  }
}

.site-footer {
  background: var(--foot-bg, #f3f3f3);
  color: var(--text-muted, #222);
  padding: 1rem 1.25rem 1.25rem;
  border-top: 1px solid #ddd;

  a {
    color: inherit;
    text-decoration: none;
    &:hover,
    &:focus-visible {
      text-decoration: underline;
    }
  }

  img {
    vertical-align: middle;
    display: inline-block;
  }

  foot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    width: min(1200px, 92dvw);
    margin-inline: auto;
    align-items: start;

    foot-item {
      display: grid;
      gap: 0.25rem;
    }

    .foot-title {
      font-weight: 700;
      font-size: 1rem;
    }

    .foot-value {
      margin: 0;
      color: var(--text-muted, #333);
      overflow-wrap: anywhere;
      word-break: break-word;
    }
  }
}

html, body {
  height: 100%;              
}

body {
  display: flex;
  flex-direction: column;    
  min-height: 100dvh;         
}

main {
  flex: 1;              
}


@media (max-width: 1024px) {
  .site-footer foot-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 1rem;
    column-gap: 1.25rem;
  }
}

@media (max-width: 520px) {
  .site-footer foot-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

.site-footer img:hover {
  animation: pulse 0.6s ease-in-out;
}

::view-transition-old(root) {
  animation: page-exit-up 420ms ease-in-out both;
}

::view-transition-new(root) {
  animation: page-enter-up 420ms ease-in-out both;
}

@keyframes page-exit-up {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-40px) scale(0.96);
  }
}

@keyframes page-enter-up {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 0.001ms !important;
  }
}

.site-nav .theme-panel {
  position: absolute;
  right: 1rem;
  top: calc(100% + 0.4rem);
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid rgba(0,0,0,0.12);
  box-shadow: 0 10px 28px rgba(0,0,0,0.18);
  min-width: 260px;
  font-size: 0.9rem;
  z-index: 20;
}

.site-nav .theme-row + .theme-row {
  margin-top: 0.5rem;
}

.site-nav .theme-row strong {
  display: block;
  margin-bottom: 0.3rem;
}

.site-nav .theme-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.site-nav .theme-presets button {
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.15);
  background: #f3f4f6;
  cursor: pointer;
  font-size: 0.8rem;
}

.site-nav .theme-custom {
  display: grid;
  gap: 0.35rem;
}

.site-nav .theme-custom label {
  display: grid;
  gap: 0.1rem;
  font-size: 0.8rem;
}

.site-nav .theme-custom select {
  padding: 0.2rem 0.3rem;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 0.85rem;
}

.site-nav #apply-custom-theme {
  margin-top: 0.3rem;
  justify-self: flex-start;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  border: 0;
  background: #38bdf8;
  color: #111827;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.85rem;
}