/* ============================================================
   Joe Theme · Modern Refresh (joe.modern.css) - FIXED
   - lighter transitions
   - no FOUC: elements visible by default; modern-fade is opt-in
   ============================================================ */

/* ---------- CSS variables (unchanged) ---------- */
:root {
  --modern-bg: #fafafa;
  --modern-bg-soft: #ffffff;
  --modern-bg-muted: #f4f4f5;
  --modern-border: rgba(0, 0, 0, 0.06);
  --modern-border-strong: rgba(0, 0, 0, 0.12);
  --modern-text: #18181b;
  --modern-text-soft: #3f3f46;
  --modern-text-muted: #71717a;
  --modern-text-faint: #a1a1aa;
  --modern-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  --modern-shadow-md: 0 4px 16px -4px rgba(0, 0, 0, 0.08);
  --modern-radius: 12px;
  --modern-radius-sm: 8px;
  --modern-radius-lg: 20px;

  --reading-font: "Source Serif 4", "Source Han Serif SC", "Noto Serif SC",
                  "Songti SC", "Source Han Serif CN", Georgia, "Times New Roman", serif;
  --ui-font: "Inter Variable", "Inter", -apple-system, BlinkMacSystemFont,
             "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono-font: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;

  --main: var(--modern-text);
  --minor: var(--modern-text-muted);
  --routine: var(--modern-text-soft);
  --classA: rgba(0, 0, 0, 0.03);
  --classB: rgba(0, 0, 0, 0.06);
  --classC: var(--modern-border);
  --classD: var(--modern-bg-muted);
  --background: var(--modern-bg-soft);
  --box-shadow: var(--modern-shadow-md);
  --text-shadow: none;
  --radius-wrap: var(--modern-radius);
  --radius-inner: var(--modern-radius-sm);
}

/* ---------- D. Auto dark mode ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-night="light"]) {
    --modern-bg: #0a0a0a;
    --modern-bg-soft: #111113;
    --modern-bg-muted: #18181b;
    --modern-border: rgba(255, 255, 255, 0.08);
    --modern-border-strong: rgba(255, 255, 255, 0.16);
    --modern-text: #fafafa;
    --modern-text-soft: #d4d4d8;
    --modern-text-muted: #a1a1aa;
    --modern-text-faint: #71717a;
    --modern-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    --modern-shadow-md: 0 4px 16px -4px rgba(0, 0, 0, 0.6);
    --classA: rgba(255, 255, 255, 0.04);
    --classB: rgba(255, 255, 255, 0.08);
    --classD: var(--modern-bg-muted);
  }
  :root:not([data-night="light"]) {
    --theme-soft: rgba(255, 255, 255, 0.04);
  }
}

html[data-night="night"] {
  --modern-bg: #0a0a0a;
  --modern-bg-soft: #111113;
  --modern-bg-muted: #18181b;
  --modern-border: rgba(255, 255, 255, 0.08);
  --modern-text: #fafafa;
  --modern-text-soft: #d4d4d8;
  --modern-text-muted: #a1a1aa;
  --main: var(--modern-text);
  --minor: var(--modern-text-muted);
  --routine: var(--modern-text-soft);
  --classA: rgba(255, 255, 255, 0.04);
  --classB: rgba(255, 255, 255, 0.08);
  --classC: rgba(255, 255, 255, 0.08);
  --classD: var(--modern-bg-muted);
  --background: var(--modern-bg-soft);
  --box-shadow: 0 4px 16px -4px rgba(0, 0, 0, 0.6);
  --text-shadow: none;
}

html[data-night="light"] {
  --modern-bg: #fafafa;
  --modern-bg-soft: #ffffff;
  --modern-text: #18181b;
  --main: var(--modern-text);
  --minor: #71717a;
  --routine: #3f3f46;
  --classA: rgba(0, 0, 0, 0.03);
  --classB: rgba(0, 0, 0, 0.06);
  --classC: rgba(0, 0, 0, 0.06);
  --classD: #f4f4f5;
  --background: #ffffff;
  --box-shadow: 0 4px 16px -4px rgba(0, 0, 0, 0.08);
}

/* ---------- B. Layout reset ---------- */
html, body {
  background: var(--modern-bg) !important;
  color: var(--modern-text);
  font-family: var(--ui-font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body::before { display: none !important; }

/* ---------- A. Header ---------- */
.joe_header {
  background: var(--modern-bg-soft) !important;
  border-bottom: 1px solid var(--modern-border) !important;
  box-shadow: none !important;
}
.joe_header.is-scrolled {
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in srgb, var(--modern-bg-soft) 80%, transparent) !important;
}
.joe_header__slideout { background: var(--modern-bg-soft) !important; }

/* ---------- A/B. Container & main ---------- */
.joe_container { max-width: 1080px; }
.joe_main { padding: 24px 0 80px; }

.joe_post, .joe_page { display: block; }
.joe_post > .joe_detail,
.joe_page > .joe_detail {
  background: var(--modern-bg-soft);
  border: 1px solid var(--modern-border);
  border-radius: var(--modern-radius);
  padding: 48px 56px;
  box-shadow: var(--modern-shadow);
  max-width: 760px;
  margin: 0 auto;
}
.joe_post__pagination,
.joe_detail__related,
.joe_detail__operate,
.joe_detail__copyright,
.joe_comment {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.joe_post ~ .joe_aside,
.joe_page ~ .joe_aside,
.joe_aside {
  display: none !important;
}
.joe_post .joe_container,
.joe_page .joe_container { display: block; }
.joe_post .joe_container > .joe_aside,
.joe_page .joe_container > .joe_aside { display: none; }
.joe_post .joe_main,
.joe_page .joe_main {
  width: 100%;
  flex: 0 0 100%;
  max-width: 100%;
}

/* ---------- A. Reading typography ---------- */
.joe_detail__article,
.joe_detail__article p,
.joe_detail__article li {
  font-family: var(--reading-font);
  font-size: 17px;
  line-height: 1.85;
  color: var(--modern-text-soft);
  letter-spacing: 0.01em;
}
.joe_detail__article p { margin: 1.2em 0; }
.joe_detail__article h1,
.joe_detail__article h2,
.joe_detail__article h3,
.joe_detail__article h4,
.joe_detail__article h5,
.joe_detail__article h6 {
  font-family: var(--ui-font);
  font-weight: 700;
  color: var(--modern-text);
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 2em 0 0.8em;
}
.joe_detail__article h2 {
  font-size: 1.5em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--modern-border);
}
.joe_detail__article h3 { font-size: 1.25em; }
.joe_detail__article a {
  color: var(--theme);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--theme) 30%, transparent);
  transition: border-color 0.2s;
}
.joe_detail__article a:hover { border-bottom-color: var(--theme); }
.joe_detail__article blockquote {
  border-left: 3px solid var(--theme);
  background: var(--modern-bg-muted);
  padding: 0.8em 1.2em;
  margin: 1.5em 0;
  color: var(--modern-text-soft);
  border-radius: 0 var(--modern-radius-sm) var(--modern-radius-sm) 0;
  font-style: normal;
}
.joe_detail__article blockquote p { margin: 0.4em 0; }
.joe_detail__article code {
  font-family: var(--mono-font);
  font-size: 0.9em;
  background: var(--modern-bg-muted);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--modern-text);
}
.joe_detail__article pre {
  font-family: var(--mono-font);
  background: #0d0d10;
  color: #e4e4e7;
  padding: 20px 24px;
  border-radius: var(--modern-radius);
  font-size: 14px;
  line-height: 1.65;
  overflow-x: auto;
}
.joe_detail__article pre code { background: transparent; color: inherit; padding: 0; }
.joe_detail__article img { border-radius: var(--modern-radius); }
.joe_detail__article ul, .joe_detail__article ol { padding-left: 1.5em; }
.joe_detail__article li { margin: 0.4em 0; }
.joe_detail__article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
}
.joe_detail__article th,
.joe_detail__article td {
  border: 1px solid var(--modern-border);
  padding: 8px 12px;
  text-align: left;
}
.joe_detail__article th { background: var(--modern-bg-muted); font-weight: 600; }

/* ---------- A/B. Article meta header ---------- */
.joe_batten { margin-bottom: 32px; }
.joe_batten .item {
  color: var(--modern-text-muted);
  font-family: var(--ui-font);
  font-size: 14px;
}

.joe_detail__title,
.joe_detail h1.title {
  font-family: var(--ui-font);
  font-size: 2.25em;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--modern-text);
  margin: 0 0 16px;
}

/* ---------- B. Like button ---------- */
.joe_detail__agree {
  margin: 32px 0;
  padding: 16px 0;
  border-top: 1px solid var(--modern-border);
}
.joe_detail__agree .agree {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.joe_detail__agree .agree .icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--modern-border-strong);
  transition: all 0.2s ease;
}
.joe_detail__agree .agree .icon:hover {
  background: var(--theme);
  border-color: var(--theme);
}
.joe_detail__agree .agree .icon.active {
  border-color: var(--theme);
  background: color-mix(in srgb, var(--theme) 10%, transparent);
}
.joe_detail__agree .agree .icon svg {
  fill: var(--modern-text-muted);
  transition: fill 0.2s;
}.joe_detail__agree .agree .icon svg path{fill:currentColor}
.joe_detail__agree .agree .icon:hover svg,
.joe_detail__agree .agree .icon.active svg {
  fill: var(--theme);
}
.joe_detail__agree .agree .text {
  color: var(--modern-text-muted);
  font-family: var(--ui-font);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

/* ---------- B. Operate ---------- */
.joe_detail__operate-share,
.joe_detail__operate-tags a { font-family: var(--ui-font); }
.joe_detail__operate-share { display: none !important; }

/* ---------- B. Cards ---------- */
.joe_list,
.joe_list__item,
.joe_grid__item,
.joe_aside__item {
  background: var(--modern-bg-soft) !important;
  border: 1px solid var(--modern-border);
  border-radius: var(--modern-radius);
  box-shadow: none !important;
  transition: border-color 0.2s, transform 0.2s;
}
.joe_list__item:hover { border-color: var(--modern-border-strong); }

/* ---------- A. Typography: button/labels ---------- */
button, input, textarea, select { font-family: var(--ui-font); }
.joe_button,
.joe_pagination li a {
  font-family: var(--ui-font);
  border-radius: var(--modern-radius-sm);
}

/* ---------- C. Smooth scroll & selection ---------- */
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
::selection {
  background: color-mix(in srgb, var(--theme) 30%, transparent);
  color: var(--modern-text);
}

/* ---------- B. Comment form ---------- */
.joe_comment {
  background: var(--modern-bg-soft);
  border: 1px solid var(--modern-border);
  box-shadow: none;
}
.joe_comment__respond-form {
  background: var(--modern-bg-muted);
  border-radius: var(--modern-radius-sm);
}
.joe_comment__title {
  font-family: var(--ui-font);
  font-weight: 700;
  border-bottom: 1px solid var(--modern-border);
  color: var(--modern-text);
}

/* ---------- D. TOC ---------- */
.joe_toc {
  background: var(--modern-bg-soft);
  border: 1px solid var(--modern-border);
  border-radius: var(--modern-radius);
  box-shadow: var(--modern-shadow);
  font-family: var(--ui-font);
  font-size: 13px;
  padding: 16px 20px;
}
.joe_toc__title {
  font-weight: 600;
  color: var(--modern-text);
  margin-bottom: 12px;
}
.joe_toc ol { list-style: none; padding-left: 0; margin: 0; }
.joe_toc ol ol { padding-left: 12px; }
.joe_toc li { margin: 4px 0; }
.joe_toc a {
  color: var(--modern-text-muted);
  text-decoration: none;
  border-bottom: none;
  display: block;
  padding: 2px 0;
  line-height: 1.5;
  transition: color 0.15s;
}
.joe_toc a:hover { color: var(--modern-text); }
.joe_toc a.active {
  color: var(--theme);
  font-weight: 500;
}

/* ---------- C. Scroll-driven fade-in (lighter + no FOUC) ----------
   KEY CHANGE: .modern-fade is OPT-IN only. JS adds it to
   below-the-fold elements AFTER first paint. Above-fold stays visible. */
.modern-fade {
  opacity: 0;
  transition: opacity 0.35s ease-out;
  will-change: opacity;
}
.modern-fade.is-visible {
  opacity: 1;
}
/* Use transform for the entrance, but it kicks in only when IO fires */
.modern-fade.is-visible {
  animation: modernFadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes modernFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- A. Reading progress bar ---------- */
.joe_reading_progress {
  background: var(--theme) !important;
  height: 2px !important;
  opacity: 0.85 !important;
}

/* ---------- B. Header & nav links ---------- */
.joe_header__above-nav .item {
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 500;
  color: var(--modern-text-soft);
  transition: color 0.15s;
}
.joe_header__above-nav .item:hover,
.joe_header__above-nav .item.active { color: var(--theme); }
.joe_header__above-nav .item.active::after {
  background: var(--theme) !important;
  height: 2px !important;
  border-radius: 1px !important;
}

/* ---------- A. Footer ---------- */
.joe_footer {
  font-family: var(--ui-font);
  color: var(--modern-text-muted);
  border-top: 1px solid var(--modern-border);
}

/* ---------- B. Action buttons ---------- */
.joe_action { z-index: 333; }
.joe_action_item {
  background: var(--modern-bg-soft) !important;
  border: 1px solid var(--modern-border) !important;
  box-shadow: var(--modern-shadow-md) !important;
}

/* ---------- A. Responsive ---------- */
@media (max-width: 768px) {
  .joe_post > .joe_detail,
  .joe_page > .joe_detail {
    padding: 24px 18px;
    border-radius: var(--modern-radius-sm);
  }
  .joe_detail__title { font-size: 1.6em; }
  .joe_detail__article,
  .joe_detail__article p { font-size: 16px; line-height: 1.75; }
  .joe_post__pagination,
  .joe_detail__related,
  .joe_detail__operate,
  .joe_detail__copyright,
  .joe_comment { padding-left: 0; padding-right: 0; }
}

/* ---------- C. View Transitions API ---------- */
@supports (view-transition-name: foo) {
  ::view-transition-old(root) { animation: vtFadeOut 0.2s ease-out both; }
  ::view-transition-new(root) { animation: vtFadeIn 0.3s ease-out both; }
}
@keyframes vtFadeOut { to { opacity: 0; } }
@keyframes vtFadeIn { from { opacity: 0; } }

/* ---------- E. Reduce motion respect ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .modern-fade { opacity: 1 !important; transform: none !important; }
}

/* ---------- E. No-JS fallback ----------
   If JS is disabled or fails, the page should still be usable */
.no-js .modern-fade { opacity: 1 !important; transform: none !important; }
/* Show Cmd+K trigger hint only when JS is available */
.no-js .cmdk-hotkey-hint { display: none; }