/* slapex export stylesheet — Slack-default-like, no JavaScript.
   Kept separate from index.html for future theme swapping
   (doc/design/html-rendering.md). */

:root {
  --text: #1d1c1d;
  --muted: #616061;
  --line: #dddddd;
  --mention-fg: #1264a3;
  --mention-bg: #e8f5fa;
  --reaction-bg: #f8f8f8;
  --reaction-line: #e0e0e0;
  --code-bg: #f8f8f8;
  --code-line: #dddddd;
  --thread-line: #d0d7de;
  --thread-chip-bg: transparent;
  --thread-chip-bg-hover: #f1f7fd;
  --thread-chip-line: transparent;
  --thread-chip-line-hover: #d8dee4;
  --thread-summary-fg: var(--mention-fg);
  --thread-summary-caret: #616061;
  --thread-avatar-border: #ffffff;
  --thread-avatar-bg: #7c3085;
  --thread-avatar-fg: #ffffff;
  --thread-avatar-more-bg: rgba(29, 28, 29, 0.72);
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 920px;
  padding: 0 16px 48px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Noto Sans CJK JP", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.46;
  color: var(--text);
  background: #ffffff;
}

/* header */
.export-header {
  padding: 20px 0 8px;
  margin-bottom: 8px;
}
.export-title-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.export-title {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  margin: 0;
  font-size: 22px;
}
.workspace-icon {
  flex: none;
  width: 24px;
  height: 24px;
  margin-right: 8px;
  border-radius: 5px;
  object-fit: cover;
}
.workspace-name,
.channel-title {
  min-width: 0;
  overflow-wrap: anywhere;
}
.title-link {
  color: inherit;
  text-decoration: none;
}
.title-link:hover,
.title-link:focus-visible {
  text-decoration: underline;
}
.title-link:focus-visible {
  outline: 2px solid var(--mention-fg);
  outline-offset: 2px;
  border-radius: 3px;
}
.export-title .channel-title { margin-left: 10px; }
.channel-hash { margin-right: 2px; }
.export-meta summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: inherit;
  font-weight: 400;
  cursor: pointer;
  list-style: none;
}
.export-meta summary::-webkit-details-marker { display: none; }
.export-meta summary::before {
  content: "▸";
  color: var(--muted);
  font-size: 10px;
}
.export-meta summary:hover { color: var(--mention-fg); }
.export-meta[open] summary::before { content: "▾"; }
.export-meta summary:focus-visible {
  outline: 2px solid var(--mention-fg);
  outline-offset: 2px;
  border-radius: 3px;
}
.export-meta dl {
  display: grid;
  grid-template-columns: 7.5em 1fr;
  gap: 2px 8px;
  margin: 6px 0 0;
  font-size: inherit;
  color: var(--muted);
}
.export-meta dt { font-weight: 700; }
.export-meta dd { margin: 0; overflow-wrap: anywhere; }

/* timeline */
.date-divider {
  display: flex;
  align-items: center;
  margin: 16px 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.date-divider::before,
.date-divider::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--line);
}
.date-divider span { padding: 0 12px; }

.message {
  display: flex;
  gap: 8px;
  padding: 6px 4px;
}
.message:hover { background: #f8f8f8; }

.avatar { flex: none; width: 36px; }
.avatar img {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  object-fit: cover;
}
.avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 4px;
  background: #7c3085;
  color: #ffffff;
  font-weight: 700;
}

.message-main { flex: 1; min-width: 0; }
.message-head { display: flex; align-items: baseline; gap: 8px; }
.author { font-weight: 900; }
.time {
  flex: none;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
.edited { color: var(--muted); font-size: 12px; font-style: normal; }
.edited-fallback { margin-top: 4px; }

.message-body { overflow-wrap: anywhere; white-space: normal; }
.me-message { font-style: italic; }

.mention {
  color: var(--mention-fg);
  background: var(--mention-bg);
  border-radius: 3px;
  padding: 0 2px;
}

code {
  font-family: Monaco, Menlo, Consolas, "Courier New", monospace;
  font-size: 12.5px;
  background: var(--code-bg);
  border: 1px solid var(--code-line);
  border-radius: 3px;
  padding: 1px 3px;
  color: #e01e5a;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--code-line);
  border-radius: 4px;
  padding: 8px;
  overflow-x: auto;
  margin: 4px 0;
}
pre code {
  border: none;
  background: none;
  color: var(--text);
  padding: 0;
}

blockquote {
  margin: 4px 0;
  padding-left: 10px;
  border-left: 4px solid var(--line);
  color: var(--muted);
}

/* system messages */
.system-message {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 2px 4px 2px 48px;
  color: var(--muted);
  font-size: 13px;
}
.system-body { min-width: 0; overflow-wrap: anywhere; }
.system-context { color: var(--muted); font-size: 12px; }

/* uploads and attachments */
.image-block { margin: 6px 0; }
.image-block a { display: inline-block; }
.upload-thumb {
  max-width: 360px;
  max-height: 280px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: block;
}
.asset-note { color: var(--muted); font-size: 12px; margin-top: 2px; }

.file-block { margin: 6px 0; }
.file-link {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  text-decoration: none;
  color: var(--text);
}
.file-link.unavailable { color: var(--muted); }

.unfurl {
  margin: 6px 0;
  padding: 6px 10px;
  border-left: 4px solid var(--line);
}
.unfurl-service {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.unfurl-service-icon {
  flex: none;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  object-fit: contain;
}
.unfurl-title { font-weight: 700; }
.unfurl-text { color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
.unfurl-image {
  max-width: 360px;
  max-height: 200px;
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-top: 4px;
  display: block;
}

/* reactions */
.reactions { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.reaction {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--reaction-bg);
  border: 1px solid var(--reaction-line);
  border-radius: 12px;
  padding: 1px 8px;
  font-size: 12px;
}
.reaction-emoji img.emoji { vertical-align: text-bottom; }
.reaction-count { color: var(--muted); }

img.emoji {
  width: 1.4em;
  height: 1.4em;
  vertical-align: text-bottom;
}

/* threads */
.thread-group {
  position: relative;
  margin: 8px 0 0 48px;
  padding-left: 0;
}
.thread-group::before {
  content: "";
  display: none;
  position: absolute;
  top: 34px;
  bottom: 4px;
  left: 8px;
  border-left: 2px solid var(--thread-line);
}
.thread-group[open]::before { display: block; }
.thread-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: min(360px, 100%);
  color: var(--text);
  background: var(--thread-chip-bg);
  border: 1px solid var(--thread-chip-line);
  border-radius: 6px;
  padding: 3px 12px 3px 0;
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 12px;
  cursor: pointer;
  list-style: none;
}
.thread-label::-webkit-details-marker { display: none; }
.thread-label:hover {
  background: var(--thread-chip-bg-hover);
  border-color: var(--thread-chip-line-hover);
}
.thread-label::after {
  content: "▸";
  flex: none;
  margin-left: auto;
  color: var(--thread-summary-caret);
  font-size: 11px;
}
.thread-group[open] .thread-label {
  background: var(--thread-chip-bg-hover);
  border-color: var(--thread-chip-line-hover);
}
.thread-group[open] .thread-label::after { content: "▾"; }
.thread-label:focus-visible {
  outline: 2px solid var(--mention-fg);
  outline-offset: 2px;
}
.thread-label-count { color: var(--thread-summary-fg); }
.thread-participants {
  display: inline-flex;
  align-items: center;
}
.thread-participant {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  overflow: hidden;
  border: 1px solid var(--thread-avatar-border);
  border-radius: 4px;
  background: var(--thread-avatar-bg);
  color: var(--thread-avatar-fg);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}
.thread-participant + .thread-participant { margin-left: -4px; }
.thread-participant img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thread-participant-more {
  background: var(--thread-avatar-more-bg);
  color: var(--thread-avatar-fg);
}
.thread {
  padding: 0 0 0 36px;
}
.thread .message {
  position: relative;
  padding: 4px;
}
.thread .message::before {
  content: "";
  position: absolute;
  top: 16px;
  left: -33px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--thread-line);
  border-radius: 50%;
  background: #ffffff;
}
.thread .avatar, .thread .avatar img { width: 28px; }
.thread .avatar img, .thread .avatar-fallback { width: 28px; height: 28px; }

.notice {
  color: var(--muted);
  font-size: 13px;
  padding: 6px 4px;
}

a { color: var(--mention-fg); }

.export-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}
.export-footer .export-meta {
  min-width: 0;
}
.footer-project-link {
  display: inline-flex;
  align-items: center;
  flex: none;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
}
.footer-project-link:hover { color: var(--mention-fg); }
.footer-logo {
  width: 16px;
  height: 16px;
  border-radius: 4px;
}