/* Webová dílna (web_applications/workshop.html, js/web-workshop.js).
   Everything is namespaced .ww-*; colours come from the subject's
   --webapp-* variables (style.css). */

.web-workshop {
  --ww-ok: #15803d;
  --ww-ok-soft: #e8f7ee;
  --ww-error: #b91c1c;
  --ww-error-soft: #fdecec;
  --ww-warn: #b45309;
  --ww-radius: 10px;
}

.ww-section {
  padding-top: 1rem;
}

.ww-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.ww-launch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin: 1rem 0 0;
  color: var(--webapp-muted);
}

/* --- Station list -------------------------------------------------------- */

.ww-sidebar {
  position: sticky;
  top: 1rem;
  display: grid;
  gap: 0.75rem;
}

.ww-progress {
  margin: 0;
  padding: 0.6rem 0.8rem;
  border-radius: var(--ww-radius);
  background: var(--webapp-accent-soft);
  color: var(--webapp-accent);
  font-weight: 800;
}

.ww-nav {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ww-nav-btn {
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--webapp-line);
  border-radius: var(--ww-radius);
  background: var(--webapp-surface);
  color: var(--webapp-ink);
  font: inherit;
  font-size: 0.92rem;
  text-align: left;
  cursor: pointer;
}

.ww-nav-btn:hover {
  border-color: var(--webapp-accent);
}

.ww-nav-btn[aria-current="true"] {
  border-color: var(--webapp-accent);
  background: var(--webapp-accent);
  color: #fff;
}

.ww-nav-number {
  display: grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--webapp-soft);
  color: var(--webapp-accent);
  font-weight: 800;
}

.ww-nav-btn[aria-current="true"] .ww-nav-number {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.ww-nav-btn.is-complete .ww-nav-number {
  background: var(--ww-ok);
  color: #fff;
}

.ww-nav-title {
  font-weight: 700;
  overflow-wrap: anywhere;
}

.ww-nav-count {
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  opacity: 0.8;
}

.ww-reset {
  justify-self: start;
  padding: 0;
  border: 0;
  background: none;
  color: var(--webapp-muted);
  font: inherit;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
}

.ww-storage-note {
  margin: 0;
  color: var(--webapp-muted);
  font-size: 0.8rem;
}

/* --- Station --------------------------------------------------------------- */

.ww-main {
  min-width: 0;
}

.ww-station {
  display: grid;
  gap: 1.25rem;
  /* Clears the sticky site header. */
  scroll-margin-top: 5.5rem;
}

.ww-station-header .eyebrow {
  margin-bottom: 0.4rem;
}

.ww-station-header h2 {
  margin: 0 0 0.5rem;
  font-size: 1.7rem;
}

.ww-station-header h2:focus {
  outline: none;
}

.ww-lesson-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}

.ww-lesson-badge {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--webapp-accent-soft);
  color: var(--webapp-accent);
  font-size: 0.8rem;
  font-weight: 800;
}

.ww-station-intro {
  max-width: 760px;
  margin: 0;
  color: var(--webapp-muted);
}

.ww-workbench {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.ww-workbench.ww-tool-html {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ww-workbench.ww-tool-selectors {
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
}

.ww-controls,
.ww-stage,
.ww-tasks-panel,
.ww-code-panel {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--webapp-line);
  border-radius: var(--ww-radius);
  background: var(--webapp-surface);
}

.ww-controls {
  display: grid;
  gap: 0.85rem;
  background: var(--webapp-soft);
}

.ww-stage {
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.ww-stage-label {
  margin: 0;
  color: var(--webapp-muted);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Controls -------------------------------------------------------------- */

.ww-field {
  display: grid;
  gap: 0.3rem;
}

.ww-field-head {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: baseline;
}

.ww-field-label {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 700;
}

.ww-field-value {
  color: var(--webapp-accent);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 800;
}

.ww-field input[type="range"] {
  width: 100%;
  accent-color: var(--webapp-accent);
}

.ww-field select,
.ww-field input[type="text"] {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--webapp-line);
  border-radius: 6px;
  background: #fff;
  font: inherit;
}

.ww-field input[type="color"] {
  width: 100%;
  height: 2.2rem;
  padding: 0.1rem;
  border: 1px solid var(--webapp-line);
  border-radius: 6px;
  background: #fff;
}

.ww-toggle {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 700;
}

.ww-toggle input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--webapp-accent);
}

.ww-inline-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.6rem;
}

.ww-mode-group {
  display: grid;
  gap: 0.85rem;
}

.ww-mode-group.ww-inline-controls {
  display: grid;
}

.ww-mode-group[hidden] {
  display: none !important;
}

.ww-note {
  margin: 0;
  color: var(--webapp-muted);
  font-size: 0.88rem;
}

.ww-note-strong {
  padding: 0.6rem 0.75rem;
  border-left: 4px solid var(--webapp-accent);
  border-radius: 6px;
  background: #fff;
  color: var(--webapp-ink);
}

.ww-note.is-error {
  color: var(--ww-error);
  font-weight: 700;
}

/* --- Tasks and generated code ---------------------------------------------- */

.ww-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.ww-bottom h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.ww-task-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ww-task {
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr);
  gap: 0.6rem;
  padding: 0.7rem;
  border: 1px solid var(--webapp-line);
  border-radius: var(--ww-radius);
}

.ww-task-status {
  display: grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border: 2px solid var(--webapp-line);
  border-radius: 50%;
  color: #fff;
  font-weight: 900;
}

.ww-task.is-done {
  border-color: color-mix(in srgb, var(--ww-ok) 40%, transparent);
  background: var(--ww-ok-soft);
}

.ww-task.is-done .ww-task-status {
  border-color: var(--ww-ok);
  background: var(--ww-ok);
}

.ww-task.is-just-done .ww-task-status {
  animation: ww-pop 0.5s ease;
}

@keyframes ww-pop {
  0% { transform: scale(0.4); }
  70% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.ww-task-text {
  margin: 0 0 0.4rem;
}

.ww-task-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.ww-hint summary {
  color: var(--webapp-accent);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.ww-hint p {
  margin: 0.35rem 0 0;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
}

.ww-requirements {
  display: grid;
  gap: 0.15rem;
  margin: 0 0 0.5rem;
  padding: 0;
  list-style: none;
  color: var(--webapp-muted);
  font-size: 0.88rem;
}

.ww-requirements .is-ok {
  color: var(--ww-ok);
  font-weight: 700;
}

.ww-code {
  margin: 0;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--webapp-code);
  color: var(--webapp-code-text);
  font-size: 0.85rem;
  line-height: 1.5;
}

.ww-code-panel[hidden] {
  display: none;
}

.ww-station-pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--webapp-line);
}

.ww-station-pager .primary-btn {
  margin-left: auto;
}

.ww-badge {
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--webapp-soft);
  color: var(--webapp-muted);
  font-size: 0.8rem;
  font-weight: 800;
}

.ww-badge.is-ok {
  background: var(--ww-ok-soft);
  color: var(--ww-ok);
}

.ww-badge.is-error {
  background: var(--ww-error-soft);
  color: var(--ww-error);
}

/* --- Tool: web ------------------------------------------------------------- */

.ww-url {
  margin: 0;
  padding: 0.6rem 0.8rem;
  overflow-wrap: anywhere;
  border: 1px solid var(--webapp-line);
  border-radius: 999px;
  background: var(--webapp-soft);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 1rem;
}

.ww-url-protocol { color: #7c3aed; font-weight: 800; }
.ww-url-domain { color: #0369a1; font-weight: 800; }
.ww-url-path { color: #b45309; font-weight: 800; }

.ww-request-log {
  display: grid;
  gap: 0.4rem;
  margin: 0;
  padding-left: 1.4rem;
}

.ww-request-log li {
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  background: var(--webapp-soft);
}

.ww-request-log .ww-log-idle { color: var(--webapp-muted); background: none; list-style: none; margin-left: -1.4rem; }
.ww-request-log .ww-log-ok { background: var(--ww-ok-soft); }
.ww-request-log .ww-log-error { background: var(--ww-error-soft); color: var(--ww-error); }
.ww-request-log .ww-log-warn { background: #fff7e6; color: var(--ww-warn); }

/* --- Tool: html ------------------------------------------------------------ */

.ww-code-editor {
  width: 100%;
  min-height: 22rem;
  padding: 0.8rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  background: var(--webapp-code);
  color: var(--webapp-code-text);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  tab-size: 2;
  resize: vertical;
}

.ww-preview-frame {
  width: 100%;
  min-height: 22rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  background: #fff;
}

/* --- Tool: selectors ------------------------------------------------------- */

.ww-selector-input {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace !important;
  font-size: 1rem !important;
}

.ww-specificity {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.ww-spec-part {
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  background: #fff;
  font-size: 0.85rem;
}

.ww-spec-part strong {
  font-size: 1.1rem;
}

.ww-spec-verdict {
  flex-basis: 100%;
  color: var(--webapp-accent);
  font-weight: 800;
}

.ww-selector-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.ww-selector-source {
  max-height: 30rem;
  font-size: 0.78rem;
}

.ww-selector-sample {
  display: grid;
  gap: 0.4rem;
  padding: 0.6rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  font-size: 0.9rem;
}

.ww-selector-sample * {
  margin: 0;
  padding: 0.15rem 0.3rem;
  border: 1px dashed transparent;
  border-radius: 4px;
  transition: background-color 0.15s ease, outline-color 0.15s ease;
}

.ww-selector-sample nav,
.ww-selector-sample footer {
  display: flex;
  gap: 0.4rem;
  background: var(--webapp-soft);
}

.ww-selector-sample h1 { font-size: 1.15rem; }
.ww-selector-sample h2 { font-size: 0.95rem; }
.ww-selector-sample ul { padding-left: 1.4rem; }
.ww-selector-sample .cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.3rem; }
.ww-selector-sample .card { border-color: var(--webapp-line); }

.ww-selector-sample .is-matched {
  outline: 3px solid #f59e0b;
  outline-offset: 1px;
  background: #fff4d6;
}

/* --- Tool: box ------------------------------------------------------------- */

.ww-box-stage {
  overflow-x: auto;
  padding: 0.5rem 0;
}

.ww-box-margin {
  width: max-content;
  background: repeating-linear-gradient(45deg, #fde7c8, #fde7c8 6px, #fff5e8 6px, #fff5e8 12px);
  outline: 1px dashed #d97706;
}

.ww-box {
  display: grid;
  place-items: center;
  min-height: 90px;
  border-style: solid;
  border-color: #1f2937;
  background: linear-gradient(#bfdbfe, #bfdbfe) content-box, #bbf7d0 padding-box;
}

.ww-box-content-label {
  color: #1e3a8a;
  font-weight: 800;
}

.ww-box-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
}

.ww-box-legend li::before {
  content: "";
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  margin-right: 0.35rem;
  border-radius: 3px;
  vertical-align: -0.1rem;
}

.ww-box-legend .is-margin::before { background: #fde7c8; outline: 1px dashed #d97706; }
.ww-box-legend .is-border::before { background: #1f2937; }
.ww-box-legend .is-padding::before { background: #bbf7d0; }
.ww-box-legend .is-content::before { background: #bfdbfe; }

.ww-formula {
  margin: 0;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  background: var(--webapp-soft);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9rem;
  font-weight: 700;
}

/* --- Tool: display --------------------------------------------------------- */

.ww-display-stage {
  padding: 1rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  line-height: 1.8;
}

.ww-display-item {
  padding: 0.3rem 0.6rem;
  border: 2px solid var(--webapp-accent);
  border-radius: 6px;
  background: var(--webapp-accent-soft);
  color: var(--webapp-accent);
  font-weight: 800;
  text-decoration: none;
}

/* --- Tool: flex ------------------------------------------------------------ */

.ww-flex-stage {
  display: flex;
  min-height: 260px;
  overflow: auto;
  padding: 0.6rem;
  border: 2px dashed var(--webapp-accent);
  border-radius: 8px;
  background: var(--webapp-soft);
}

.ww-flex-item {
  display: grid;
  place-items: center;
  min-width: 70px;
  padding: 0.5rem 0.9rem;
  border: 2px solid #fff;
  border-radius: 8px;
  background: var(--webapp-accent);
  color: #fff;
  font-weight: 800;
}

/* --- Tool: media ----------------------------------------------------------- */

.ww-format-feedback {
  margin: 0;
  font-size: 0.85rem;
}

.ww-format-feedback.is-ok { color: var(--ww-ok); }
.ww-format-feedback.is-error { color: var(--ww-error); }

.ww-media-frame {
  width: min(100%, 420px);
  max-height: 420px;
  overflow: hidden;
  border: 3px solid #1f2937;
  border-radius: 6px;
  background: repeating-conic-gradient(#e5e7eb 0% 25%, #fff 0% 50%) 0 0 / 20px 20px;
}

.ww-media-image {
  display: block;
  width: 100%;
  height: 100%;
}

/* --- Tool: typography ------------------------------------------------------ */

.ww-type-sample {
  padding: 1.2rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
}

.ww-type-sample h3 {
  margin: 0 0 0.5rem;
  font-size: 1.4em;
}

.ww-type-sample p {
  margin: 0;
}

.ww-contrast {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

/* --- Tool: states ---------------------------------------------------------- */

.ww-states-stage {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  padding: 2rem 1rem;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
}

.ww-states-input {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--webapp-line);
  border-radius: 6px;
  font: inherit;
}

.ww-demo-btn {
  padding: 0.75rem 1.3rem;
  border: 0;
  border-radius: 8px;
  background: #2563eb;
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

/* --- Tool: position -------------------------------------------------------- */

.ww-pos-window {
  position: relative;
  height: 320px;
  overflow: hidden;
  border: 2px solid #1f2937;
  border-radius: 8px;
  transform: translateZ(0); /* contains position: fixed inside the demo */
}

.ww-pos-scroller {
  height: 100%;
  overflow-y: auto;
}

.ww-pos-nav {
  z-index: 10;
  padding: 0.6rem 0.8rem;
  background: #1f2937;
  color: #fff;
  font-weight: 800;
}

.ww-pos-nav.is-fixed {
  left: 0;
  right: 0;
}

.ww-pos-content {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
}

.ww-pos-card {
  width: min(100%, 280px);
  overflow: visible;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  background: #fff;
}

.ww-pos-card p {
  margin: 0;
  padding: 0.6rem 0.8rem;
}

.ww-pos-picture {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  height: 120px;
  border-radius: 8px 8px 0 0;
  background: linear-gradient(135deg, #60a5fa, #34d399);
  color: #fff;
  font-weight: 800;
}

.ww-pos-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: #ea580c;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 900;
}

.ww-pos-filler {
  margin: 0;
  padding: 0.8rem;
  border-radius: 6px;
  background: var(--webapp-soft);
}

/* --- Tool: responsive ------------------------------------------------------ */

.ww-resp-holder {
  overflow: hidden;
}

.ww-resp-viewport {
  transform-origin: top left;
  border: 2px solid #1f2937;
  border-radius: 10px;
  background: #fff;
}

.ww-resp-page {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

.ww-resp-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-radius: 6px;
  background: #1f2937;
  color: #fff;
  font-size: 1.1rem;
}

.ww-resp-grid {
  display: grid;
  gap: 1rem;
}

.ww-resp-card {
  display: grid;
  place-items: center;
  min-height: 90px;
  border-radius: 8px;
  background: var(--webapp-accent-soft);
  color: var(--webapp-accent);
  font-size: 1.1rem;
  font-weight: 800;
}

/* --- Tool: grid ------------------------------------------------------------ */

.ww-grid-scroll {
  overflow-x: auto;
}

.ww-grid-stage {
  display: grid;
  padding: 0.5rem;
  border: 2px dashed var(--webapp-accent);
  border-radius: 8px;
  background: var(--webapp-soft);
}

.ww-grid-item {
  display: grid;
  place-items: center;
  min-height: 70px;
  border-radius: 6px;
  background: var(--webapp-accent);
  color: #fff;
  font-weight: 800;
}

.ww-grid-area-header { background: #1f2937; }
.ww-grid-area-sidebar { background: #7c3aed; min-height: 140px; }
.ww-grid-area-main { background: var(--webapp-accent); min-height: 140px; }
.ww-grid-area-footer { background: #475569; }

/* --- Editors with line numbers --------------------------------------------- */

.ww-editor {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  overflow: hidden;
  border: 1px solid var(--webapp-line);
  border-radius: 8px;
  background: var(--webapp-code);
}

.ww-editor:focus-within {
  outline: 3px solid var(--webapp-accent);
  outline-offset: 2px;
}

.ww-gutter {
  display: flex;
  flex-direction: column;
  min-width: 2.4em;
  padding: 0.8rem 0.45rem 0.8rem 0.6rem;
  overflow: hidden;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  color: #7b8798;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  text-align: right;
  user-select: none;
}

.ww-gutter span {
  flex: none;
}

.ww-gutter .is-marked {
  color: #fca5a5;
  font-weight: 800;
}

.ww-editor .ww-code-editor {
  min-height: 14rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  white-space: pre;
  overflow-wrap: normal;
}

.ww-editor .ww-code-editor:focus {
  outline: none;
}

.ww-editor.is-readonly .ww-code-editor {
  min-height: 0;
  color: #b9c7d8;
}

.ww-code-panel .ww-editor .ww-code-editor {
  min-height: 12rem;
}

.ww-lint {
  display: grid;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ww-lint[hidden] {
  display: none;
}

.ww-lint-item {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border: 1px solid color-mix(in srgb, var(--ww-error) 35%, transparent);
  border-radius: 6px;
  background: var(--ww-error-soft);
  color: var(--ww-error);
  font: inherit;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
}

.ww-requirements li[tabindex] {
  cursor: help;
}

.ww-requirements li[tabindex]:hover,
.ww-requirements li[tabindex]:focus {
  text-decoration: underline dotted;
  outline: none;
}

/* --- Code tool ----------------------------------------------------------- */

.ww-workbench.ww-tool-code {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ww-active-task {
  margin: 0;
  padding: 0.5rem 0.7rem;
  border-left: 4px solid var(--webapp-accent);
  border-radius: 6px;
  background: var(--webapp-surface);
  font-size: 0.9rem;
  font-weight: 700;
}

.ww-active-task[hidden],
.ww-target[hidden] {
  display: none;
}

.ww-code-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ww-target {
  display: grid;
  gap: 0.5rem;
}

.ww-target-frame {
  min-height: 16rem;
  border-style: dashed;
  pointer-events: none;
}

.ww-console {
  min-height: 4.5rem;
  max-height: 12rem;
  overflow: auto;
  white-space: pre-wrap;
}

/* Hidden pages the checks run in; off screen, but laid out at a real width. */
.ww-probe-frame {
  position: absolute;
  top: 0;
  left: -10000px;
  border: 0;
  visibility: hidden;
}

/* --- Hints, active task, station done ------------------------------------ */

.ww-hints {
  display: grid;
  gap: 0.4rem;
}

.ww-hint-btn {
  justify-self: start;
  padding: 0;
  border: 0;
  background: none;
  color: var(--webapp-accent);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.ww-hint-btn[hidden],
.ww-hint-list[hidden] {
  display: none;
}

.ww-hint-list {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ww-hint-list li {
  padding: 0.45rem 0.6rem;
  border-left: 3px solid var(--webapp-accent);
  border-radius: 6px;
  background: var(--webapp-soft);
  font-size: 0.88rem;
  white-space: pre-wrap;
}

.ww-hint-list li.is-code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.85rem;
}

.ww-task.is-active {
  border-color: var(--webapp-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--webapp-accent) 25%, transparent);
}

.ww-complete {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--ww-ok) 40%, transparent);
  border-radius: var(--ww-radius);
  background: var(--ww-ok-soft);
  color: var(--ww-ok);
}

.ww-complete[hidden] {
  display: none;
}

.ww-complete .primary-btn {
  margin-left: auto;
}

.ww-complete.is-celebrating {
  animation: ww-celebrate 0.6s ease;
}

@keyframes ww-celebrate {
  0% { transform: scale(0.96); opacity: 0; }
  60% { transform: scale(1.02); opacity: 1; }
  100% { transform: scale(1); }
}

.ww-nav-btn.is-dimmed {
  opacity: 0.45;
}

.ww-focus {
  margin: 0;
  padding: 0.5rem 0.7rem;
  border-left: 4px solid var(--webapp-accent);
  border-radius: 6px;
  background: var(--webapp-soft);
  font-size: 0.88rem;
  font-weight: 800;
}

.ww-focus[hidden] {
  display: none;
}

.ww-nav-group {
  margin: 0.6rem 0 0.1rem;
  color: var(--webapp-muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.ww-nav-group:first-child {
  margin-top: 0;
}

a.ww-lesson-badge {
  text-decoration: none;
}

a.ww-lesson-badge:hover,
a.ww-lesson-badge:focus-visible {
  text-decoration: underline;
}

.ww-bottom.is-wide {
  grid-template-columns: minmax(0, 1fr);
}

/* --- Narrow screens -------------------------------------------------------- */

.ww-nav-panel {
  display: grid;
  gap: 0.75rem;
}

/* Only on narrow screens (below). */
.ww-nav-toggle,
.ww-view-switch {
  display: none;
}

@media (max-width: 980px) {
  .ww-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  /* Anchors the station list, which opens over the station below. */
  .ww-sidebar {
    position: relative;
    z-index: 15;
  }

  /* The station list is folded: one button with the current station. */
  .ww-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    min-height: 3rem;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--webapp-line);
    border-radius: var(--ww-radius);
    background: var(--webapp-surface);
    color: var(--webapp-ink);
    font: inherit;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    /* Opening scrolls it to the top, below the sticky site header. */
    scroll-margin-top: 5rem;
  }

  .ww-nav-toggle-current {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .ww-nav-toggle-hint {
    flex: none;
    color: var(--webapp-accent);
    font-size: 0.85rem;
  }

  .ww-nav-toggle-hint::after {
    content: " ▾";
  }

  .ww-sidebar.is-nav-open .ww-nav-toggle-hint::after {
    content: " ▴";
  }

  .ww-nav-panel {
    display: none;
  }

  /* Opened: a compact dropdown with its own scrolling, over the station,
     so the page does not jump by the length of the whole list. */
  .ww-sidebar.is-nav-open .ww-nav-panel {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    left: 0;
    display: grid;
    gap: 0.5rem;
    max-height: min(65vh, 34rem);
    padding: 0 0.5rem 0.6rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid var(--webapp-line);
    border-radius: var(--ww-radius);
    background: var(--webapp-surface);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.28);
  }

  .ww-nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.1rem;
  }

  .ww-nav-group,
  .ww-nav-group:first-child {
    grid-column: 1 / -1;
    margin: 0;
    padding: 0.6rem 0.4rem 0.3rem;
  }

  .ww-nav-btn {
    grid-template-columns: 1.6rem minmax(0, 1fr) auto;
    min-height: 2.6rem;
    padding: 0.35rem 0.4rem;
    border-color: transparent;
    background: transparent;
  }

  .ww-nav-number {
    width: 1.6rem;
    height: 1.6rem;
    font-size: 0.85rem;
  }

  .ww-focus {
    margin-top: 0.5rem;
  }

  .ww-nav-panel .ww-reset {
    margin: 0 0.4rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--webapp-line);
    width: calc(100% - 0.8rem);
    text-align: left;
  }

  .ww-nav-panel .ww-storage-note {
    margin: 0 0.4rem;
  }
}

@media (min-width: 600px) and (max-width: 980px) {
  .ww-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 0.5rem;
  }
}

@media (max-width: 760px) {
  .ww-workbench,
  .ww-workbench.ww-tool-html,
  .ww-workbench.ww-tool-code,
  .ww-workbench.ww-tool-selectors,
  .ww-bottom,
  .ww-selector-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ww-station-header h2 {
    font-size: 1.4rem;
  }

  /* Code stations: editors or preview, switched by .ww-view-switch. */
  .ww-view-switch {
    display: flex;
    gap: 0.3rem;
    padding: 0.3rem;
    border: 1px solid var(--webapp-line);
    border-radius: 999px;
    background: var(--webapp-surface);
  }

  .ww-view-tab {
    flex: 1;
    min-height: 2.6rem;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--webapp-ink);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
  }

  .ww-view-tab[aria-pressed="true"] {
    background: var(--webapp-accent);
    color: #fff;
  }

  .ww-workbench[data-view="code"] > .ww-stage,
  .ww-workbench[data-view="preview"] > .ww-controls {
    display: none;
  }

  /* 16px or more: phones do not zoom the page when a field gets focus. */
  .web-workshop input:not([type="range"]):not([type="checkbox"]):not([type="radio"]):not([type="color"]),
  .web-workshop select,
  .web-workshop .ww-code-editor,
  .web-workshop .ww-gutter {
    font-size: 16px;
  }

  .ww-editor .ww-code-editor {
    min-height: 10rem;
  }

  .ww-preview-frame {
    min-height: 18rem;
  }

  .ww-station-pager {
    flex-direction: column;
  }

  .ww-station-pager > * {
    width: 100%;
  }

  .ww-station-pager > span:empty {
    display: none;
  }

  .ww-station-pager .primary-btn {
    order: -1;
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ww-task.is-just-done .ww-task-status,
  .ww-complete.is-celebrating {
    animation: none;
  }
}