/*
 * reading-enhancements.css — Typography, images, toolbar, and focus-mode styles
 *
 * Scoped to .vtx-lang-content inside #post / #article-container.
 * Does NOT force display on inactive wrappers; permanent-i18n.css owns visibility.
 */

/* ═══════════════════════════════════════════════════════════════════
 * Typography per language
 * ═══════════════════════════════════════════════════════════════════ */
.vtx-lang-content {
  font-size: 18px;
  margin-inline: auto;
}

/* Chinese */
.vtx-lang-content[lang="zh"],
.vtx-lang-content[data-vtx-lang="zh"] {
  max-width: 36em;
  line-height: 1.9;
  font-family:
    -apple-system,
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    "Noto Sans CJK SC",
    "WenQuanYi Micro Hei",
    sans-serif;
}

/* Japanese */
.vtx-lang-content[lang="ja"],
.vtx-lang-content[data-vtx-lang="ja"] {
  max-width: 34em;
  line-height: 1.95;
  font-family:
    -apple-system,
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    "Noto Sans CJK JP",
    "Yu Gothic",
    "MS PGothic",
    sans-serif;
  line-break: strict;
}

/* English (Latin) */
.vtx-lang-content[lang="en"],
.vtx-lang-content[data-vtx-lang="en"] {
  max-width: 68ch;
  line-height: 1.75;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
}

/* Preserve prose paragraph elements — no regrouping, no word-break:break-all */
.vtx-lang-content p {
  word-break: normal;
  overflow-wrap: break-word;
}

/* ═══════════════════════════════════════════════════════════════════
 * Images — sizing, portrait, tall-expand
 * ═══════════════════════════════════════════════════════════════════ */
.vtx-lang-content img {
  aspect-ratio: auto;
  object-fit: contain;
  max-width: 100%;
  max-height: 65vh;        /* fallback */
  max-height: 65svh;
  width: auto;
  margin: auto;
  display: block;
}

/* Portrait images (naturalHeight/naturalWidth > 1.45) */
.vtx-lang-content img.vtx-portrait {
  max-width: min(100%, 360px);
}

/* Expanded state for extremely tall images */
.vtx-lang-content img.vtx-expanded-image {
  max-height: none;
  max-width: 100%;
}

/* Expand / Collapse button — placed outside original image/link, no wrapping */
.vtx-expand-btn {
  display: block;
  margin: 8px auto;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  color: #60a5fa;
  background: transparent;
  border: 1px solid #60a5fa;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  line-height: 1.4;
}

.vtx-expand-btn:hover {
  background: #60a5fa;
  color: #fff;
}

.vtx-expand-btn:focus-visible {
  outline: 2px solid #60a5fa;
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════════════
 * Reading toolbar — compact, before article wrappers
 * ═══════════════════════════════════════════════════════════════════ */
.vtx-reading-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px 0;
  padding: 10px 16px;
  border: 1px solid rgba(128, 128, 128, 0.18);
  border-radius: 8px;
  font-size: 0.85rem;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  color: #666;
  background: #fafafa;
}

.vtx-reading-toolbar > * {
  flex-shrink: 0;
}

/* Separator dots */
.vtx-toolbar-sep {
  color: rgba(128, 128, 128, 0.35);
  user-select: none;
}

/* Reading time */
.vtx-reading-time {
  color: #555;
  white-space: nowrap;
}

/* Date */
.vtx-reading-date {
  color: #555;
  white-space: nowrap;
}

/* Focus button */
.vtx-focus-btn {
  padding: 4px 12px;
  font-size: 0.82rem;
  font-family: inherit;
  color: #60a5fa;
  background: transparent;
  border: 1px solid #60a5fa;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  line-height: 1.4;
}

.vtx-focus-btn:hover {
  background: #60a5fa;
  color: #fff;
}

.vtx-focus-btn[aria-pressed="true"] {
  background: #60a5fa;
  color: #fff;
}

.vtx-focus-btn:focus-visible {
  outline: 2px solid #60a5fa;
  outline-offset: 2px;
}

/* Translation status badge */
.vtx-translation-status {
  margin-left: auto;
  font-size: 0.82rem;
  white-space: nowrap;
}

.vtx-status-ai {
  color: #e6a817;
}

.vtx-status-reviewed {
  color: #34a853;
}

/* Report translation issue link */
.vtx-report-link {
  font-size: 0.8rem;
  color: #8b949e;
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 2px 4px;
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
}

.vtx-report-link:hover {
  color: #60a5fa;
}

/* Copy context button */
.vtx-copy-context-btn {
  font-size: 0.8rem;
  color: #8b949e;
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 2px 4px;
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
}

.vtx-copy-context-btn:hover {
  color: #60a5fa;
}

.vtx-copy-context-btn:focus-visible {
  outline: 2px solid #60a5fa;
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════════════
 * Focus reading mode — hide sidebars & distractions
 * ═══════════════════════════════════════════════════════════════════ */
html.vtx-focus-reading #aside-content,
html.vtx-focus-reading #sidebar,
html.vtx-focus-reading #live2d-plugin,
html.vtx-focus-reading .live2d-widget-container,
html.vtx-focus-reading #universe canvas,
html.vtx-focus-reading live2d-plugin {
  display: none !important;
}

/* ═══════════════════════════════════════════════════════════════════
 * Mobile
 * ═══════════════════════════════════════════════════════════════════ */
@media screen and (max-width: 768px) {
  .vtx-lang-content {
    font-size: 17px;
  }

  .vtx-reading-toolbar {
    gap: 6px;
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .vtx-lang-content img.vtx-portrait {
    max-width: min(100%, 280px);
  }
}

/* ═══════════════════════════════════════════════════════════════════
 * Dark mode — explicit theme
 * ═══════════════════════════════════════════════════════════════════ */
html[data-theme="dark"] .vtx-reading-toolbar {
  background: rgba(30, 30, 30, 0.95);
  border-color: rgba(255, 255, 255, 0.12);
  color: #aaa;
}

html[data-theme="dark"] .vtx-reading-time,
html[data-theme="dark"] .vtx-reading-date {
  color: #aaa;
}

html[data-theme="dark"] .vtx-toolbar-sep {
  color: rgba(255, 255, 255, 0.18);
}

html[data-theme="dark"] .vtx-expand-btn {
  color: #60a5fa;
  border-color: #60a5fa;
}

html[data-theme="dark"] .vtx-expand-btn:hover {
  background: #60a5fa;
  color: #fff;
}

html[data-theme="dark"] .vtx-report-link,
html[data-theme="dark"] .vtx-copy-context-btn {
  color: #8b949e;
}

html[data-theme="dark"] .vtx-report-link:hover,
html[data-theme="dark"] .vtx-copy-context-btn:hover {
  color: #60a5fa;
}

/* Dark mode — OS-level fallback when no explicit data-theme */
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .vtx-reading-toolbar {
    background: rgba(30, 30, 30, 0.95);
    border-color: rgba(255, 255, 255, 0.12);
    color: #aaa;
  }

  html:not([data-theme]) .vtx-reading-time,
  html:not([data-theme]) .vtx-reading-date {
    color: #aaa;
  }

  html:not([data-theme]) .vtx-toolbar-sep {
    color: rgba(255, 255, 255, 0.18);
  }
}

/* ═══════════════════════════════════════════════════════════════════
 * Reduced motion
 * ═══════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .vtx-focus-btn,
  .vtx-expand-btn {
    transition: none;
  }
}
/* Integration with the existing Hao theme */
#post-meta .post-meta-wordcount[hidden]{display:none!important}
#article-container .vtx-lang-content p{font-size:inherit;line-height:inherit;margin:0 0 1em;text-align:start}
#article-container .vtx-lang-content img{height:auto!important;max-height:65vh;max-height:65svh;width:auto!important}
#article-container .vtx-lang-content img.vtx-expanded-image{max-height:none;width:100%!important}
#article-container .vtx-lang-content{width:100%;box-sizing:border-box}
.vtx-reading-toolbar{max-width:720px;margin:0 auto 24px;padding:8px 0;border:0;border-radius:0;background:transparent!important;line-height:1.7}
.vtx-reading-toolbar a,.vtx-reading-toolbar button{font-size:13px!important}
html.vtx-focus-reading #aside-content,html.vtx-focus-reading #universe,html.vtx-focus-reading #live2d,html.vtx-focus-reading #live2d-tips,html.vtx-focus-reading #snow{display:none!important}
html.vtx-focus-reading #post{width:100%!important;max-width:960px;margin-inline:auto}
html.vtx-focus-reading .layout{justify-content:center}
@media(max-width:768px){#post{padding-left:20px!important;padding-right:20px!important}.vtx-reading-toolbar{gap:8px}#article-container .vtx-lang-content{max-width:100%}}

#article-container .vtx-lang-content[lang="en"]{max-width:min(68ch,720px)!important}
#article-container .vtx-lang-content p{font-size:inherit!important;line-height:inherit!important;text-align:start!important;word-break:normal!important;overflow-wrap:break-word!important;letter-spacing:normal!important}
.vtx-reader-context{max-width:720px;margin:0 auto 22px;font-size:14px;line-height:1.8;color:var(--heo-secondtext,#8b949e)}
.vtx-reader-context summary{cursor:pointer;padding:5px 0}
#article-container .vtx-reader-context p{font-size:14px!important;line-height:1.8!important;text-align:start!important;margin:8px 0!important}
/* Override Hao's absolute summary: its heading must reserve its own line. */
#article-container details.vtx-reader-context{position:static!important;display:block!important;float:none!important;clear:both;box-sizing:border-box;max-width:720px;width:100%;height:auto!important;max-height:none!important;margin:0 auto 24px!important;padding:0!important;overflow:visible!important;transform:none!important}
#article-container details.vtx-reader-context>summary{position:static!important;display:list-item!important;inset:auto!important;float:none!important;transform:none!important;width:auto!important;height:auto!important;min-height:0!important;box-sizing:border-box;margin:0!important;padding:12px 16px!important;line-height:1.6!important;overflow:visible!important}
#article-container details.vtx-reader-context>.vtx-reader-context-body{position:static!important;display:block;clear:both;padding:12px 16px 16px;white-space:pre-wrap;overflow-wrap:anywhere;font-size:14px;line-height:1.8;text-align:start}
#article-container details.vtx-reader-context:not([open])>.vtx-reader-context-body{display:none!important}

/* ── Host: absolutely positioned in BODY, matches image rect ── */
.vtx-img-transcript-host {
  position: absolute;
  z-index: 20;
  pointer-events: none;       /* clicks pass through to image / link below */
  overflow: visible;
}

/* ── Toggle button ──────────────────────────────────────────── */
.vtx-img-transcript-btn {
  position: absolute;
  bottom: 6px;
  right: 6px;
  z-index: 2;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 38px;
  height: 38px;
  padding: 0;
  border: none;
  border-radius: 6px;

  background: rgba(248, 250, 252, 0.88);
  color: #475569;
  cursor: pointer;
  pointer-events: auto;

  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transition: background 0.15s ease, transform 0.15s ease;
}

.vtx-img-transcript-btn:hover,
.vtx-img-transcript-btn:focus-visible {
  background: rgba(255, 255, 255, 0.98);
  transform: scale(1.05);
}

.vtx-img-transcript-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 1px;
}

.vtx-img-transcript-btn svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

/* pressed state accent */
.vtx-img-transcript-btn[aria-pressed="true"] {
  background: rgba(235, 239, 244, 0.92);
}

/* ── Screen-reader-only label ───────────────────────────────── */
.vtx-img-transcript-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Overlay layer ──────────────────────────────────────────── */
.vtx-img-transcript-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: none;
  pointer-events: auto;
}

.vtx-img-transcript-overlay.vtx-img-transcript-open {
  display: block;
}

/* ── Semi-transparent black mask ────────────────────────────── */
.vtx-img-transcript-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

/* ── Scrollable text list (fallback when no layout boxes) ──── */
.vtx-img-transcript-scroll {
  position: absolute;
  inset: 12px 12px 52px;
  z-index: 1;

  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;

  /* dynamic font size via inline style on container for tiny images */
  font-size: 14px;
  line-height: 1.55;
  color: #fff;
}

.vtx-img-transcript-scroll::-webkit-scrollbar {
  width: 4px;
}
.vtx-img-transcript-scroll::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.35);
  border-radius: 2px;
}

.vtx-img-transcript-line {
  margin: 0 0 6px 0;
  word-break: break-word;
}
.vtx-img-transcript-line:last-child {
  margin-bottom: 0;
}

/* ── Positioned text boxes (layout-map mode) ─────────────────── */
.vtx-img-transcript-box {
  position: absolute;
  z-index: 1;
  overflow: hidden;

  padding: 1px 3px;
  color: #fff;
  line-height: 1.35;
  word-break: break-word;

  /* background for readability on mask */
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
}

/* ── Tiny-image adjustments ──────────────────────────────────── */
.vtx-img-transcript-host[style*="width"] {
  min-width: 0;
}
.vtx-img-transcript-host[hidden]{display:none!important;}
.vtx-img-transcript-line {color:#fff!important; font-size:inherit!important; line-height:inherit!important;}

.vtx-image-reading{display:block;margin:10px 0 20px;font-size:14px;line-height:1.7;text-align:start}
.vtx-image-reading button{font:inherit;color:var(--heo-main,#60a5fa);background:transparent;border:0;padding:6px 0;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.vtx-image-reading-text{display:block;margin-top:8px;padding-left:12px;border-left:2px solid #8b949e}
.vtx-image-reading-text[hidden]{display:none!important}
.vtx-image-reading-text>span{display:block;margin-bottom:8px}