:root {
  --bg: #1e1e2e;
  --surface: #181825;
  --overlay: #313244;
  --text: #cdd6f4;
  --subtext: #a6adc8;
  --accent: #89b4fa;
  --green: #a6e3a1;
  --peach: #fab387;
  --red: #f38ba8;
  --border: #45475a;
  --editor-bg: #11111b;
  --gutter: #6c7086;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 12px;
}

header h1 {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

#doc-title {
  flex: 1;
  max-width: 300px;
  background: var(--overlay);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  display: none;
}
#doc-title:focus { border-color: var(--accent); }

header .toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
}

.toolbar button, .header-btn {
  background: var(--overlay);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s;
}

.toolbar button:hover, .header-btn:hover {
  background: var(--border);
}

.toolbar button.active {
  background: var(--accent);
  color: var(--surface);
  border-color: var(--accent);
}

footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 4px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.status {
  font-size: 12px;
  color: var(--subtext);
  white-space: nowrap;
}

.header-right {
  display: flex;
  gap: 8px;
  align-items: center;
}

#save-status {
  font-size: 11px;
  color: var(--subtext);
  display: none;
}
#save-status.saving { color: var(--peach); }
#save-status.saved { color: var(--green); }
#save-status.error { color: var(--red); }

.main {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* --- Document sidebar --- */
#doc-sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: none;
  flex-direction: column;
  flex-shrink: 0;
}

#doc-sidebar .sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--subtext);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#doc-sidebar .sidebar-header button {
  background: var(--overlay);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
}
#doc-sidebar .sidebar-header button:hover { background: var(--border); }

#doc-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.doc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background 0.1s;
}
.doc-item:hover { background: var(--overlay); }
.doc-item.active {
  background: var(--overlay);
  border-left-color: var(--accent);
}

.doc-item-info {
  min-width: 0;
  flex: 1;
}

.doc-item-title {
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-item-date {
  font-size: 11px;
  color: var(--gutter);
  margin-top: 2px;
}

.doc-item-delete {
  background: none;
  border: none;
  color: var(--gutter);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
  border-radius: 3px;
  opacity: 0;
  transition: opacity 0.1s;
}
.doc-item:hover .doc-item-delete { opacity: 1; }
.doc-item-delete:hover { color: var(--red); background: var(--overlay); }

.pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--subtext);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.divider {
  width: 3px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.15s;
}

.divider:hover, .divider.dragging {
  background: var(--accent);
}

.editor-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#editor {
  width: 100%;
  height: 100%;
  background: var(--editor-bg);
  color: var(--text);
  border: none;
  outline: none;
  resize: none;
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Monaco, "Cascadia Code", monospace;
  font-size: 14px;
  line-height: 1.6;
  padding: 12px 16px;
  tab-size: 2;
  white-space: pre;
  overflow: auto;
}

#preview {
  flex: 1;
  padding: 16px 24px;
  overflow: auto;
  background: var(--editor-bg);
  font-size: 15px;
  line-height: 1.7;
}

/* Org HTML preview styles */
#preview .org-document { max-width: 720px; }
#preview h1, #preview h2, #preview h3,
#preview h4, #preview h5, #preview h6 {
  color: var(--accent);
  margin: 1em 0 0.4em;
  line-height: 1.3;
}
#preview h1 { font-size: 1.6em; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
#preview h2 { font-size: 1.35em; }
#preview h3 { font-size: 1.15em; }
#preview p { margin: 0.6em 0; }
#preview a { color: var(--accent); text-decoration: none; }
#preview a:hover { text-decoration: underline; }
#preview code {
  background: var(--overlay);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.9em;
}
#preview pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  margin: 0.8em 0;
}
#preview pre code { background: none; padding: 0; font-size: 13px; }
#preview pre code.hljs { background: var(--surface); }
#preview blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 16px;
  margin: 0.8em 0;
  color: var(--subtext);
}
#preview ul, #preview ol { margin: 0.5em 0; padding-left: 1.5em; }
#preview li { margin: 0.2em 0; }
#preview li input[type="checkbox"] { margin-right: 6px; }
#preview table { border-collapse: collapse; margin: 0.8em 0; }
#preview th, #preview td { border: 1px solid var(--border); padding: 6px 12px; }
#preview th { background: var(--overlay); }
#preview hr { border: none; border-top: 1px solid var(--border); margin: 1.2em 0; }
#preview .org-todo {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.8em;
  font-weight: 700;
  font-family: monospace;
  background: var(--red);
  color: var(--surface);
  margin-right: 4px;
}
#preview .org-todo-done .org-todo { background: var(--green); }
#preview .org-priority { color: var(--peach); font-weight: 700; margin-right: 4px; }
#preview .org-tags { float: right; font-size: 0.8em; }
#preview .org-tag {
  background: var(--overlay);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 4px;
  font-family: monospace;
}
#preview time {
  background: var(--overlay);
  padding: 1px 6px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.9em;
}
#preview .org-planning { font-size: 0.9em; color: var(--subtext); margin: 0.2em 0; }
#preview .org-planning .scheduled { color: var(--green); }
#preview .org-planning .deadline { color: var(--red); }

/* --- Code execution --- */
#preview .org-src-container {
  position: relative;
  margin: 0.8em 0;
}
#preview .org-src-container pre {
  margin: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
#preview .org-src-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
}
#preview .org-src-lang {
  font-size: 11px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--subtext);
}
#preview .org-run-btn {
  background: var(--green);
  color: var(--surface);
  border: none;
  padding: 3px 14px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
#preview .org-run-btn:hover { opacity: 0.85; }
#preview .org-run-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
#preview .org-results:empty { display: none; }
#preview .org-results {
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 6px 6px;
  overflow: hidden;
}
#preview .org-results-static {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 0.4em 0 0.8em;
}
#preview .org-result-stdout {
  background: rgba(166, 227, 161, 0.08);
  border-left: 3px solid var(--green);
}
#preview .org-result-stdout pre {
  margin: 0;
  padding: 8px 12px;
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: 13px;
}
#preview .org-result-stderr {
  background: rgba(243, 139, 168, 0.08);
  border-left: 3px solid var(--red);
  padding: 8px 12px;
  font-size: 13px;
  color: var(--red);
}
#preview .org-result-stderr pre {
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  color: inherit;
}
#preview .org-result-exit {
  padding: 4px 12px;
  font-size: 11px;
  color: var(--peach);
  background: var(--surface);
}
#preview .org-result-pending {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--subtext);
  font-style: italic;
}

/* Loading / empty states */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--gutter);
  font-style: italic;
}

/* --- Auth modal --- */
#auth-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: center;
}
#auth-modal.visible { display: flex; }

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  width: 360px;
  max-width: 90vw;
}

.auth-box h2 {
  color: var(--accent);
  font-size: 18px;
  margin-bottom: 20px;
  text-align: center;
}

.auth-box input {
  width: 100%;
  background: var(--editor-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 4px;
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
  font-family: inherit;
}
.auth-box input:focus { border-color: var(--accent); }

.auth-box .auth-submit {
  width: 100%;
  background: var(--accent);
  color: var(--surface);
  border: none;
  padding: 10px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 12px;
}
.auth-box .auth-submit:hover { opacity: 0.9; }
.auth-box .auth-submit:disabled { opacity: 0.5; cursor: not-allowed; }

.auth-toggle {
  text-align: center;
  font-size: 13px;
  color: var(--subtext);
}
.auth-toggle a {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}
.auth-toggle a:hover { text-decoration: underline; }

#auth-error {
  color: var(--red);
  font-size: 13px;
  margin-bottom: 12px;
  display: none;
  text-align: center;
}

#auth-success {
  color: var(--green);
  font-size: 13px;
  margin-bottom: 12px;
  display: none;
  text-align: center;
}

.auth-skip {
  text-align: center;
  margin-top: 12px;
  font-size: 12px;
  color: var(--gutter);
}
.auth-skip a {
  color: var(--subtext);
  cursor: pointer;
  text-decoration: none;
}
.auth-skip a:hover { text-decoration: underline; }

/* --- Share button & modal --- */
#btn-share {
  font-size: 13px;
}
#btn-share.shared {
  background: var(--green);
  color: var(--surface);
  border-color: var(--green);
}

#share-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: center;
}
#share-modal.visible { display: flex; }

.share-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  width: 480px;
  max-width: 90vw;
}

.share-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.share-box-header h2 {
  color: var(--accent);
  font-size: 16px;
  margin: 0;
}

.share-close {
  background: none;
  border: none;
  color: var(--subtext);
  font-size: 20px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
.share-close:hover { color: var(--text); }

.share-description {
  font-size: 13px;
  color: var(--subtext);
  margin-bottom: 16px;
}

.share-url-row {
  display: flex;
  gap: 8px;
}
.share-url-row input {
  flex: 1;
  background: var(--editor-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 13px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  outline: none;
}
.share-url-row input:focus { border-color: var(--accent); }

.share-url-row button {
  background: var(--accent);
  color: var(--surface);
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.share-url-row button:hover { opacity: 0.9; }

.share-copied {
  font-size: 12px;
  color: var(--green);
  margin-top: 8px;
  visibility: hidden;
}
.share-copied.show { visibility: visible; }

/* --- Username modal --- */
#username-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: center;
}
#username-modal.visible { display: flex; }

.username-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  width: 420px;
  max-width: 90vw;
}

.username-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.username-box-header h2 {
  color: var(--accent);
  font-size: 16px;
  margin: 0;
}

.username-input-row {
  margin-bottom: 8px;
}
.username-input-row input {
  width: 100%;
  background: var(--editor-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  outline: none;
}
.username-input-row input:focus { border-color: var(--accent); }

.username-preview {
  font-size: 13px;
  color: var(--subtext);
  margin-bottom: 8px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  min-height: 1.3em;
}

.username-status {
  font-size: 13px;
  margin-bottom: 12px;
  min-height: 1.3em;
}
.username-status.checking { color: var(--subtext); }
.username-status.available { color: var(--green); }
.username-status.taken { color: var(--red); }

.username-save {
  width: 100%;
  background: var(--accent);
  color: var(--surface);
  border: none;
  padding: 10px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.username-save:hover { opacity: 0.9; }
.username-save:disabled { opacity: 0.5; cursor: not-allowed; }

@media (max-width: 768px) {
  .main { flex-direction: column; }
  .divider { width: auto; height: 3px; cursor: row-resize; }
  #doc-sidebar { width: 100%; max-height: 200px; border-right: none; border-bottom: 1px solid var(--border); }
}