:root {
  color-scheme: dark light;
  --bg: #0d1117;
  --fg: #c9d1d9;
  --panel: #161b22;
  --border: #30363d;
  --accent: #58a6ff;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --fg: #1f2328;
    --panel: #f6f8fa;
    --border: #d0d7de;
    --accent: #0969da;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--bg);
  color: var(--fg);
  height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
header h1 { font-size: 1rem; margin: 0; }
.status { font-size: 0.8rem; opacity: 0.7; }
header button { margin-left: auto; }
header a { color: var(--accent); font-size: 0.8rem; }
header button, header a {
  font: inherit;
  font-size: 0.8rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}

#keys-panel, #hidden-panel {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
#keys-panel[hidden], #hidden-panel[hidden] { display: none; }
#keys-panel h2, #hidden-panel h2 { font-size: 0.9rem; margin: 0 0 0.4rem; }
#keys-panel .hint, #hidden-panel .hint { font-size: 0.75rem; opacity: 0.7; margin: 0 0 0.6rem; }
#hidden-list { list-style: none; margin: 0; padding: 0; font-size: 0.8rem; }
#hidden-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
}
#hidden-list .hidden-label { flex: 1; }
#hidden-list button {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}
#keys-create { display: flex; gap: 0.5rem; margin-bottom: 0.6rem; }
#keys-create input, #keys-create button {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.4rem 0.6rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
}
#keys-create button { cursor: pointer; }
#new-key {
  font-size: 0.8rem;
  padding: 0.5rem;
  margin-bottom: 0.6rem;
  background: rgba(88, 166, 255, 0.1);
  border: 1px solid var(--accent);
  border-radius: 6px;
}
#new-key[hidden] { display: none; }
#new-key code { display: block; margin-top: 0.3rem; word-break: break-all; }
#keys-list { list-style: none; margin: 0; padding: 0; font-size: 0.8rem; }
#keys-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
}
#keys-list .key-label { flex: 1; }
#keys-list button {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background: transparent;
  color: #f85149;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

#layout { flex: 1; display: flex; min-height: 0; }
#sessions {
  width: 220px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 0.5rem;
}
.session-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.5rem 0.2rem;
  font-size: 0.75rem;
  font-weight: bold;
  opacity: 0.7;
}
.session-header .session-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-header .hide-btn {
  font-size: 0.7rem;
  font-weight: normal;
  padding: 0.05rem 0.35rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  opacity: 0.6;
}
.session-header .hide-btn:hover { opacity: 1; }
#sessions .session {
  padding: 0.35rem 0.5rem 0.35rem 1.1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#sessions .session:hover { background: rgba(127, 127, 127, 0.15); }
#sessions .session.active { background: var(--accent); color: #fff; }
main { flex: 1; overflow: auto; padding: 0.75rem 1rem; display: flex; flex-direction: column; min-height: 0; }
#pane { margin: 0; white-space: pre; font-size: 0.85rem; line-height: 1.35; }
.doc-item { display: flex; align-items: center; gap: 0.4rem; }
.doc-item .doc-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc-item .hide-btn { opacity: 0.6; }
.doc-item:hover .hide-btn, .doc-item.active .hide-btn { opacity: 1; }
#doc-frame { flex: 1; width: 100%; height: 100%; border: none; background: var(--bg); }
#doc-frame[hidden] { display: none; }
#doc-zip a {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  text-decoration: none;
}
#doc-zip[hidden] { display: none; }
#doc-zip { overflow: auto; }
.zip-file-list { list-style: none; margin: 0.5rem 0; padding: 0; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.zip-file-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.6rem;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  cursor: pointer;
}
.zip-file-list li:last-child .zip-file-btn { border-bottom: none; }
.zip-file-btn:hover { background: rgba(127, 127, 127, 0.15); }
#doc-zip-preview-frame {
  width: 100%;
  height: 60vh;
  margin-top: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
}
#doc-zip-preview-frame[hidden] { display: none; }
#doc-zip-preview-text {
  margin: 0.5rem 0 0;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.85rem;
}
#doc-zip-preview-text[hidden] { display: none; }
#doc-zip-preview-image { max-width: 100%; margin-top: 0.5rem; border-radius: 6px; }
#doc-zip-preview-image[hidden] { display: none; }
#doc-zip-preview-binary[hidden] { display: none; }