#learn-surface {
  margin: 24px 0 0;
  color: var(--surface-text, #17251e);
}

#learn-surface .learn-head,
#learn-surface .learn-toolbar,
#learn-surface .learn-card,
#learn-surface .learn-source-card {
  border: 1px solid var(--surface-border, #d2ddd6);
  background: var(--surface-panel, #ffffff);
}

#learn-surface .learn-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
  border-radius: 10px 10px 0 0;
}

#learn-surface .learn-kicker,
#learn-surface .learn-category,
#learn-surface .learn-minutes,
#learn-surface .learn-version,
#learn-surface .learn-source-label,
#learn-surface .learn-source-meta {
  color: var(--surface-muted, #53675b);
  font: 10px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

#learn-surface h2,
#learn-surface h3,
#learn-surface h4,
#learn-surface p { margin-top: 0; }
#learn-surface h2 { margin-bottom: 8px; color: var(--surface-text, #17251e); font-size: clamp(25px, 3vw, 38px); }
#learn-surface .learn-head p { max-width: 600px; margin-bottom: 0; color: var(--surface-muted, #53675b); }
#learn-surface .learn-progress { align-self: flex-start; color: var(--surface-text, #17251e); font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; }
#learn-surface .learn-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 16px; border-top: 0; background: var(--surface-panel-soft, #f0f6f2); }
#learn-surface .learn-filters { display: flex; flex-wrap: wrap; gap: 7px; }
#learn-surface .learn-filters button,
#learn-surface .learn-expand {
  border: 1px solid var(--surface-border, #d2ddd6);
  border-radius: 999px;
  background: transparent;
  color: var(--surface-text, #17251e);
  cursor: pointer;
  font: 11px ui-monospace, SFMono-Regular, Menlo, monospace;
  padding: 10px 14px;
  min-height: 44px;
}
#learn-surface .learn-filters button.active,
#learn-surface .learn-filters button:hover,
#learn-surface .learn-expand:hover { border-color: var(--surface-action, #2dba70); background: color-mix(in srgb, var(--surface-action, #2dba70) 12%, transparent); }
#learn-surface button:focus-visible,
#learn-surface input:focus-visible { outline: 2px solid var(--surface-focus, #73dae5); outline-offset: 2px; }
#learn-surface .learn-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding-top: 12px; }
#learn-surface .learn-card { min-width: 0; padding: 18px; border-radius: 9px; }
#learn-surface .learn-card-top { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
#learn-surface .learn-category { color: var(--surface-action, #2dba70); }
#learn-surface h3 { margin-bottom: 8px; color: var(--surface-text, #17251e); font-size: 18px; }
#learn-surface .learn-summary { min-height: 42px; margin-bottom: 14px; color: var(--surface-muted, #53675b); line-height: 1.5; }
#learn-surface .learn-details { margin-top: 16px; border-top: 1px solid var(--surface-border, #d2ddd6); padding-top: 16px; }
#learn-surface .learn-body { color: var(--surface-text, #17251e); line-height: 1.6; }
#learn-surface h4 { margin-bottom: 9px; color: var(--surface-muted, #53675b); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; text-transform: uppercase; }
#learn-surface .learn-checklist { display: grid; gap: 8px; padding: 14px; border-radius: 7px; background: var(--surface-panel-soft, #f0f6f2); }
#learn-surface .learn-check,
#learn-surface .learn-complete { display: flex; align-items: center; min-height: 44px; gap: 9px; color: var(--surface-text, #17251e); font-size: 13px; line-height: 1.4; }
#learn-surface input[type='checkbox'] { accent-color: var(--surface-action, #2dba70); margin-top: 2px; }
#learn-surface .learn-complete { margin-top: 4px; padding-top: 10px; border-top: 1px solid var(--surface-border, #d2ddd6); font-weight: 600; }
#learn-surface .learn-sources { display: grid; gap: 8px; margin-top: 18px; }
#learn-surface .learn-source-card { display: grid; gap: 3px; padding: 10px; border-radius: 7px; background: var(--surface-panel-soft, #f0f6f2); }
#learn-surface .learn-source-title { overflow: hidden; color: var(--surface-text, #17251e); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
#learn-surface .learn-source-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--surface-action, #2dba70); font-size: 12px; overflow-wrap: anywhere; }
#learn-surface .learn-source-topics,
#learn-surface .learn-source-note { margin: 2px 0 0; color: var(--surface-muted, #53675b); font-size: 11px; line-height: 1.45; }
#learn-surface .learn-empty { grid-column: 1 / -1; padding: 22px; border: 1px dashed var(--surface-border, #d2ddd6); color: var(--surface-muted, #53675b); text-align: center; }
#learn-surface .learn-disclaimer { margin: 14px 0 0; color: var(--surface-muted, #53675b); font-size: 11px; }

@media (max-width: 680px) {
  #learn-surface { margin-top: 30px; }
  #learn-surface .learn-head { display: block; padding: 18px; }
  #learn-surface .learn-progress { margin-top: 16px; }
  #learn-surface .learn-toolbar { display: block; }
  #learn-surface .learn-version { display: block; margin-top: 10px; }
  #learn-surface .learn-grid { grid-template-columns: 1fr; }
  #learn-surface .learn-summary { min-height: 0; }
}


#learn-surface .learn-path-description { margin: 14px 0 0; color: var(--surface-muted); font-size: 14px; }
#learn-surface .learn-example { padding: 16px; margin: 16px 0; border-inline-start: 3px solid var(--surface-action); border-radius: 0 8px 8px 0; background: var(--surface-panel-soft); }
#learn-surface .learn-example p { margin-bottom: 0; }
#learn-surface .learn-educator { display: flex; flex-direction: column; }
#learn-surface .learn-educator-head { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
#learn-surface .learn-educator-head h3 { margin-bottom: 3px; }
#learn-surface .learn-educator-avatar { display: grid; place-items: center; flex: 0 0 48px; height: 48px; border-radius: 14px; background: color-mix(in srgb, var(--surface-action) 20%, var(--surface-panel)); color: var(--surface-text); font-weight: 700; }
#learn-surface .learn-educator-topic, #learn-surface .learn-scope { color: var(--surface-muted); line-height: 1.5; font-size: 13px; }
#learn-surface .learn-access { font-size: 12px; color: var(--surface-text); }
#learn-surface .learn-educator-link { display: inline-flex; align-items: center; min-height: 44px; margin-top: auto; color: var(--surface-action); font-weight: 600; }
#learn-surface a:focus-visible { outline: 2px solid var(--surface-focus); outline-offset: 3px; }
#learn-surface .learn-source-card { padding: 10px 12px; }
#learn-surface .learn-source-meta { letter-spacing: 0; text-transform: none; }
@media (max-width: 430px) {
  #learn-surface .learn-filters { width: 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; }
  #learn-surface .learn-filters button { padding-inline: 6px; font-size: 11px; }
  #learn-surface .learn-card { padding: 16px; }
  #learn-surface .learn-head { gap: 12px; }
}