/* DevForge — editor.css
   Code editor (line numbers, textarea/highlight overlay, syntax token colors)
   and the lesson info panel below it. */

/* ---- Editor body ---- */
.editor-body {
  position: relative;
  flex: 1;
  display: flex;
  overflow: hidden;
}
.line-numbers {
  width: 46px;
  flex-shrink: 0;
  text-align: right;
  padding: 12px 8px 12px 0;
  color: var(--text-faint);
  font: var(--editor-font-size)/1.6 var(--font-mono);
  background: var(--bg-editor);
  overflow: hidden;
  user-select: none;
  border-right: 1px solid var(--border-soft);
  white-space: pre;
}
.code-area {
  position: relative;
  flex: 1;
  overflow: hidden;
}
.code-area pre,
.code-area textarea {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 16px;
  border: 0;
  font: var(--editor-font-size)/1.6 var(--font-mono);
  white-space: pre;
  overflow: auto;
  box-sizing: border-box;
  tab-size: 2;
}
.code-area pre {
  z-index: 1;
  color: var(--text-primary);
  pointer-events: none;
  background: transparent;
}
.code-area textarea {
  z-index: 2;
  background: transparent;
  color: transparent;
  caret-color: var(--text-primary);
  resize: none;
  outline: none;
  -webkit-text-fill-color: transparent;
}
.code-area textarea::selection {
  background: var(--accent-soft);
  -webkit-text-fill-color: transparent;
}
.tok-comment {
  color: var(--text-faint);
  font-style: italic;
}
.tok-string {
  color: #a8d68c;
}
.tok-keyword {
  color: #c493f0;
}
.tok-number {
  color: #f0a35e;
}
.tok-func {
  color: #7fc2ff;
}
.tok-builtin {
  color: #ffb454;
}
.tok-tag {
  color: #e58a8a;
}
.tok-attr {
  color: #f0c46e;
}
.tok-selector {
  color: #e58a8a;
}
.tok-prop {
  color: #7fc2ff;
}
.tok-value {
  color: #a8d68c;
}
.tok-punc {
  color: var(--text-secondary);
}

/* ---- Lesson panel ---- */
.lesson-panel {
  flex-shrink: 0;
  max-height: 280px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}
.lesson-panel.collapsed .lesson-body {
  display: none;
}
.lesson-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 9px 14px;
  cursor: pointer;
  flex-shrink: 0;
  background: transparent;
  border: none;
  font-family: inherit;
  text-align: left;
}
.lesson-panel-title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent-text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.lesson-panel-header svg {
  width: 12px;
  height: 12px;
  color: var(--text-faint);
  transition: transform 0.15s;
}
.lesson-panel.collapsed .lesson-panel-header svg {
  transform: rotate(180deg);
}
.lesson-body {
  padding: 0 16px 14px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}
.lesson-body h3 {
  color: var(--text-primary);
  font-size: 14px;
  margin: 6px 0 8px;
}
.lesson-body p {
  margin: 0 0 10px;
}
.lesson-body code {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-text);
}
.tip-box {
  display: flex;
  gap: 9px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12.5px;
  color: var(--text-primary);
  margin-top: 4px;
}
.tip-box svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--accent-text);
}
.goals-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 14px;
  border-top: 1px solid var(--border-soft);
  border-left: none;
  border-right: none;
  border-bottom: none;
  cursor: pointer;
  flex-shrink: 0;
  background: transparent;
  font-family: inherit;
  text-align: left;
}
.goals-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}
.goals-count {
  color: var(--accent-text);
}
.goals-list {
  list-style: none;
  margin: 0;
  padding: 0 14px 10px;
  display: none;
}
.goals-list.open {
  display: block;
}
.goal-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 12.5px;
  color: var(--text-secondary);
}
.goal-check {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  border: 1.5px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.goal-row.done .goal-check {
  background: var(--success);
  border-color: var(--success);
}
.goal-row.done {
  color: var(--text-primary);
  text-decoration: line-through;
  text-decoration-color: var(--text-faint);
}
.goal-check svg {
  width: 9px;
  height: 9px;
  color: #04250b;
}
.lesson-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.nav-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 12.5px;
  cursor: pointer;
}
.nav-btn:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--text-faint);
}
.nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.nav-btn svg {
  width: 12px;
  height: 12px;
}
.bottom-counter {
  font-size: 12px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

/* ---- progressive hints ---- */
.hints-section {
  padding: 0 16px 12px;
}
.hints-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hints-list li {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 12.5px;
  color: var(--text-primary);
  line-height: 1.5;
}
.hint-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  font-size: 12.5px;
  cursor: pointer;
}
.hint-btn:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--text-faint);
}
.hint-btn:disabled {
  opacity: 0.5;
  cursor: default;
}