* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #e6edf3;
  background: #0d1117;
  padding: 1rem;
}

/* Top bar */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}
.top-bar-left, .top-bar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.search-form {
  display: flex;
  gap: 0.5rem;
}
.search-form input[type="text"] {
  padding: 0.3rem 0.6rem;
  border: 1px solid #30363d;
  border-radius: 4px;
  background: #161b22;
  color: #e6edf3;
  font-size: 0.85rem;
}
.search-form input[type="text"]:focus {
  outline: none;
  border-color: #58a6ff;
}
.search-form button {
  padding: 0.3rem 0.6rem;
  border: 1px solid #30363d;
  border-radius: 4px;
  background: #21262d;
  color: #c9d1d9;
  font-size: 0.85rem;
  cursor: pointer;
}
.search-form button:hover {
  background: #30363d;
}

.logout-btn, .text-btn {
  color: #8b949e;
  text-decoration: none;
  font-size: 0.85rem;
}
.logout-btn:hover, .text-btn:hover {
  color: #e6edf3;
}

.container {
  max-width: 860px;
  margin: 0 auto;
}

/* Directory header with sort toggle */
.dir-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #30363d;
}
.dir-header .breadcrumb {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}
.sort-toggle a {
  color: #8b949e;
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
}
.sort-toggle a:hover {
  color: #58a6ff;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #30363d;
}
.breadcrumb a {
  color: #58a6ff;
  text-decoration: none;
}
.breadcrumb a:hover {
  text-decoration: underline;
}
.breadcrumb span {
  color: #e6edf3;
  font-weight: 600;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

/* File list */
.file-list {
  list-style: none;
}
.file-list .item {
  border-bottom: 1px solid #21262d;
}
.file-list .item a {
  display: block;
  padding: 0.6rem 0.5rem;
  color: #e6edf3;
  text-decoration: none;
  font-size: 0.95rem;
}
.file-list .item a:hover {
  background: #161b22;
}
.file-list .dir a {
  color: #58a6ff;
}

/* Search results */
.search-header {
  margin-bottom: 1rem;
}
.search-header h1 {
  margin-bottom: 0;
}
.search-results .item a {
  padding: 0.8rem 0.5rem;
}
.result-title {
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.result-snippet {
  font-size: 0.85rem;
  color: #8b949e;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.empty {
  color: #8b949e;
  padding: 2rem 0;
}

/* Back link */
.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  color: #58a6ff;
  text-decoration: none;
  font-size: 0.95rem;
}
.back-link:hover {
  text-decoration: underline;
}

/* Markdown body */
.markdown-body {
  color: #e6edf3;
  line-height: 1.7;
}
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: #f0f6fc;
  border-bottom: 1px solid #21262d;
  padding-bottom: 0.3em;
}
.markdown-body h1 { font-size: 1.6rem; }
.markdown-body h2 { font-size: 1.3rem; }
.markdown-body h3 { font-size: 1.1rem; }

.markdown-body p {
  margin-bottom: 1em;
}
.markdown-body a {
  color: #58a6ff;
}
.markdown-body ul, .markdown-body ol {
  margin-bottom: 1em;
  padding-left: 1.5em;
}
.markdown-body li {
  margin-bottom: 0.3em;
}
.markdown-body blockquote {
  border-left: 3px solid #30363d;
  padding: 0.5em 1em;
  margin-bottom: 1em;
  color: #8b949e;
}
.markdown-body code {
  background: #161b22;
  padding: 0.15em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.markdown-body pre {
  background: #161b22;
  padding: 1em;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1em;
}
.markdown-body pre code {
  background: none;
  padding: 0;
}
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
}
.markdown-body th, .markdown-body td {
  border: 1px solid #30363d;
  padding: 0.5em 0.75em;
  text-align: left;
}
.markdown-body th {
  background: #161b22;
}
.markdown-body img {
  max-width: 100%;
}
.markdown-body hr {
  border: none;
  border-top: 1px solid #30363d;
  margin: 1.5em 0;
}

/* Login */
.login-box {
  max-width: 320px;
  margin: 20vh auto 0;
  text-align: center;
}
.login-box h1 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: #e6edf3;
}
.login-box form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.login-box input[type="password"] {
  padding: 0.6rem 0.75rem;
  border: 1px solid #30363d;
  border-radius: 6px;
  background: #161b22;
  color: #e6edf3;
  font-size: 0.95rem;
}
.login-box input[type="password"]:focus {
  outline: none;
  border-color: #58a6ff;
}
.login-box button {
  padding: 0.6rem;
  border: none;
  border-radius: 6px;
  background: #238636;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
}
.login-box button:hover {
  background: #2ea043;
}
.login-error {
  color: #f85149;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

/* Edit feature */
.btn {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  border: 1px solid #30363d;
  border-radius: 6px;
  background: #21262d;
  color: #c9d1d9;
  font-size: 0.85rem;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover {
  background: #30363d;
  color: #e6edf3;
}
.btn-primary {
  background: #238636;
  border-color: #2ea043;
  color: #fff;
}
.btn-primary:hover {
  background: #2ea043;
}

.edit-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.editor-textarea {
  width: 100%;
  min-height: 60vh;
  padding: 1rem;
  background: #0d1117;
  color: #e6edf3;
  border: 1px solid #30363d;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  resize: vertical;
}
.editor-textarea:focus {
  outline: none;
  border-color: #58a6ff;
}
.edit-actions {
  display: flex;
  gap: 0.75rem;
}

/* Backup */
.backup-menu {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.backup-btn {
  width: 100%;
  text-align: left;
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
}
.backup-output {
  background: #161b22;
  color: #e6edf3;
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid #30363d;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}
.diff-add { color: #3fb950; }
.diff-del { color: #f85149; }
.backup-confirm {
  display: flex;
}