/* Block Editor — application styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text);
  background: var(--paper);
  overflow: hidden;
}

/* ─── Layout ─────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ─── Sidebar ─────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border-right: 1px solid var(--border);
  overflow: hidden;
}

#sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-3);
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#hub-link {
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 2px 6px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast), color var(--t-fast);
}
#hub-link:hover { background: var(--hover-bg); color: var(--rust); }

#sidebar-header span {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#page-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) 0;
}

.sidebar-page-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px var(--space-4);
  font-size: 13.5px;
  cursor: pointer;
  border-radius: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background var(--t-fast);
  user-select: none;
}
.sidebar-page-item:hover { background: var(--hover-bg); }
.sidebar-page-item.active {
  background: var(--active-bg);
  color: var(--rust);
  font-weight: 500;
}

#new-page-btn {
  margin: var(--space-2) var(--space-3);
  padding: 7px var(--space-3);
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
#new-page-btn:hover {
  border-color: var(--rust);
  color: var(--rust);
  background: var(--hover-bg);
}

/* ─── Main area ───────────────────────────────── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--paper-light);
}

#page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: var(--paper-light);
  flex-shrink: 0;
  gap: var(--space-4);
}

#breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 13px;
  color: var(--text-muted);
  overflow: hidden;
}
.bc-item {
  white-space: nowrap;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--t-fast);
}
.bc-item:hover { color: var(--rust); }
.bc-current { color: var(--text); font-weight: 500; }
.bc-sep { margin: 0 2px; color: var(--border); }

#toolbar {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

#toolbar button {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--paper-light);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
#toolbar button:hover {
  border-color: var(--rust);
  color: var(--rust);
  background: var(--hover-bg);
}

/* ─── Editor ──────────────────────────────────── */
#editor {
  flex: 1;
  overflow-y: auto;
  padding: 48px var(--space-5) 120px;
}

/* Limit content width, centre it */
#editor > * { max-width: var(--editor-max); margin-left: auto; margin-right: auto; }

/* Page title */
.page-title-wrap {
  max-width: var(--editor-max);
  margin: 0 auto 24px;
}
.page-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--header);
  outline: none;
  border: none;
  width: 100%;
  min-height: 1.25em;
  cursor: text;
  caret-color: var(--rust);
}
.page-title:empty::before {
  content: 'Untitled';
  color: var(--border);
  pointer-events: none;
}

/* ─── Blocks container ────────────────────────── */
#blocks-container {
  max-width: var(--editor-max);
  margin: 0 auto;
}

/* ─── Block ───────────────────────────────────── */
.block {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  border-radius: var(--r-sm);
  margin-bottom: 2px;
  transition: background var(--t-fast);
}
.block:hover { background: var(--hover-bg); }
.block:hover .drag-handle { opacity: 1; }

.block-body {
  flex: 1;
  min-width: 0;
  padding: 2px 4px 2px 0;
}

/* ─── Drag handle ─────────────────────────────── */
.drag-handle {
  flex-shrink: 0;
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  opacity: 0;
  cursor: grab;
  transition: opacity var(--t-fast);
  padding-top: 3px;
  user-select: none;
  letter-spacing: -2px;
}
.drag-handle:active { cursor: grabbing; }

/* ─── Block content ───────────────────────────── */
.block-content {
  display: block;
  outline: none;
  min-height: 1.5em;
  line-height: 1.6;
  word-break: break-word;
  white-space: pre-wrap;
  caret-color: var(--rust);
}
.block-content:focus { background: transparent; }
.block-content:empty::before {
  content: attr(data-placeholder);
  color: var(--border);
  pointer-events: none;
}

/* Block type styles */
.block-h1 .block-content {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--header);
  margin-top: 20px;
}
.block-h2 .block-content {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--header);
  margin-top: 14px;
}
.block-p .block-content {
  font-size: 15px;
  line-height: 1.65;
}
.block-bullet {
  padding-left: 4px;
}
.block-bullet .block-body::before {
  content: '•';
  color: var(--rust);
  margin-right: 6px;
  font-size: 18px;
  line-height: 1;
  float: left;
  margin-top: 2px;
}
.block-bullet .block-content {
  font-size: 15px;
  line-height: 1.65;
}

/* Todo */
.todo-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  cursor: pointer;
}
.todo-check {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  flex-shrink: 0;
  accent-color: var(--rust);
  cursor: pointer;
}
.block-todo .block-content { font-size: 15px; line-height: 1.65; }
.block-todo.is-checked .block-content {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Page link block */
.block-page { align-items: center; }
.page-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--rust);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 2px 4px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
}
.page-link:hover { background: var(--active-bg); text-decoration: underline; }

/* Children nesting */
.block-children {
  margin-top: 2px;
}

/* ─── Drag states ─────────────────────────────── */
.block.dragging { opacity: 0.4; }
.block.drop-before { border-top: 2px solid var(--rust); }
.block.drop-after  { border-bottom: 2px solid var(--rust); }

/* ─── Highlight (hash anchor) ─────────────────── */
@keyframes block-flash {
  0%   { background: var(--highlight-bg); }
  100% { background: transparent; }
}
.block-highlighted {
  animation: block-flash 2s ease forwards;
}

/* ─── Slash menu ──────────────────────────────── */
.slash-menu {
  position: absolute;
  z-index: 9999;
  min-width: 200px;
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  padding: 4px 0;
}
.slash-menu.hidden { display: none; }

.slash-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 7px var(--space-3);
  cursor: pointer;
  transition: background var(--t-fast);
}
.slash-item:hover, .slash-item.selected {
  background: var(--hover-bg);
}
.slash-item.selected { background: var(--active-bg); }
.slash-icon {
  font-size: 14px;
  font-weight: 600;
  width: 28px;
  text-align: center;
  color: var(--rust);
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.slash-label {
  font-size: 13.5px;
  color: var(--text);
}
.slash-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}

/* ─── Import overlay ──────────────────────────── */
#import-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(42,37,31,0.4);
  z-index: 9998;
  align-items: center;
  justify-content: center;
}
#import-overlay.visible { display: flex; }
#import-dialog {
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
  width: 540px;
  max-width: 90vw;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
#import-dialog h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--header);
}
#import-dialog p {
  font-size: 13px;
  color: var(--text-muted);
}
#import-textarea {
  width: 100%;
  height: 200px;
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--text);
  resize: vertical;
  outline: none;
}
#import-textarea:focus { border-color: var(--rust); }
.import-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}
.btn {
  padding: 7px 16px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.btn-primary {
  background: var(--rust);
  color: #fff;
}
.btn-primary:hover { background: var(--rust-light); }
.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text-muted);
}
.btn-secondary:hover { background: var(--hover-bg); color: var(--text); }

/* ─── Code block ──────────────────────────────── */
.block-code { align-items: flex-start; }

.code-wrap {
  width: 100%;
  border: 1px solid var(--code-border);
  border-radius: var(--r-md);
  background: var(--code-bg);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  padding: 5px 10px 4px;
  border-bottom: 1px solid var(--code-border);
}

.code-lang-input {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  outline: none;
  width: 6ch;
  padding: 1px 4px;
  border-radius: var(--r-sm);
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), width var(--t-fast);
}
.code-lang-input:focus {
  background: var(--hover-bg);
  color: var(--rust);
  cursor: text;
  width: 12ch;
}

/* ── Overlay: highlighted backdrop + transparent textarea ── */
.code-stage {
  position: relative;
}

.code-backdrop {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  pointer-events: none;
  color: var(--text);
  user-select: none;
  tab-size: 2;
  -moz-tab-size: 2;
}
.code-backdrop code {
  font-family: inherit;
  font-size: inherit;
  background: transparent;
}

.code-textarea {
  position: relative;
  display: block;
  width: 100%;
  min-height: 62px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  background: transparent;
  color: transparent;
  caret-color: var(--text);
  border: none;
  outline: none;
  resize: none;
  overflow: hidden;
  tab-size: 2;
  -moz-tab-size: 2;
}

/* ── Syntax token colours ─────────────────────── */
.hl-comment { color: var(--hl-comment); font-style: italic; }
.hl-str     { color: var(--hl-str); }
.hl-kw      { color: var(--hl-kw); font-weight: 600; }
.hl-num     { color: var(--hl-num); }
.hl-cls     { color: var(--hl-cls); }

/* ─── Scrollbar ───────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── Utility ─────────────────────────────────── */
.hidden { display: none !important; }