/* ===== CASE STAGES — "Trọng điểm" unlock (document directory + question panel) =====
   Used by site/pages/casefile-tap01.html together with /site/assets/scripts/case-stages.js.
   Builds on the folder styles in site.css (.folder-*, .ffi-*, .btn). */

.casefile-wrap--stages {
  max-width: 1240px;
}

.cs-layout {
  --cs-paper: #fbf6ea;
  --cs-right: #2f6b45;
  --cs-right-soft: rgba(47, 107, 69, 0.1);
  --cs-wrong: #9b3a26;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 410px);
  gap: 2rem;
  align-items: start;
}

/* site.css gives .folder-files display:flex, which would otherwise beat the hidden attribute. */
.cs-layout [hidden] {
  display: none !important;
}

/* Until the script decides what is unlocked, show only the first group (no flash of later evidence). */
.cs-layout:not(.is-ready) .cs-group:not([data-cs-group="1"]) .folder-files {
  display: none;
}

.cs-eyebrow {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cs-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ----- Left: document directory ----- */

.cs-directory {
  min-width: 0;
}

.cs-directory__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.cs-directory__title {
  font-family: var(--font-accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-directory__count {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.cs-jump {
  display: none;
  margin-left: auto;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cs-group {
  scroll-margin-top: calc(var(--site-nav-height) + 1rem);
  border-radius: 4px;
}

.cs-group + .cs-group {
  margin-top: 1.6rem;
}

.cs-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.75rem;
  margin-bottom: 0.65rem;
}

.cs-group__title {
  font-family: var(--font-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-group__range {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.cs-group__status {
  margin-left: auto;
  padding: 0.18rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-accent);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

.cs-group__status:empty {
  display: none;
}

.cs-group.is-current .cs-group__status {
  background: var(--accent);
  border-color: var(--accent-strong);
  color: #27211c;
}

.cs-group.is-solved .cs-group__status {
  border-color: rgba(47, 107, 69, 0.35);
  color: var(--cs-right);
}

.cs-group.is-locked .cs-group__title,
.cs-group.is-locked .cs-group__range {
  color: var(--text-muted);
  opacity: 0.8;
}

.cs-group__lock {
  padding: 1rem 1.1rem;
  border: 1px dashed var(--border);
  border-radius: 2px;
  background: rgba(242, 233, 212, 0.55);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cs-group.is-just-unlocked {
  animation: cs-unlock 2.4s ease-out;
}

@keyframes cs-unlock {
  0% { box-shadow: 0 0 0 0 rgba(255, 218, 61, 0); }
  12% { box-shadow: 0 0 0 8px rgba(255, 218, 61, 0.55); background: rgba(255, 218, 61, 0.14); }
  100% { box-shadow: 0 0 0 0 rgba(255, 218, 61, 0); background: transparent; }
}

/* ----- Right: question panel ----- */

.cs-panel {
  position: sticky;
  top: calc(var(--site-nav-height) + 1.25rem);
  max-height: calc(100vh - var(--site-nav-height) - 2.5rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scroll-margin-top: calc(var(--site-nav-height) + 1rem);
  padding: 1.4rem;
  background: var(--cs-paper);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: 0 4px 18px rgba(90, 60, 40, 0.1);
}

.cs-noscript {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cs-progress {
  margin-bottom: 1.25rem;
}

.cs-progress__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.6rem;
}

.cs-progress__count {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.cs-bar {
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(86, 61, 44, 0.14);
}

.cs-bar > span {
  display: block;
  height: 100%;
  background: var(--accent-strong);
  transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.cs-steps {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 0.4rem;
  margin: 0.8rem 0 0;
  padding: 0;
  list-style: none;
}

.cs-step {
  width: 100%;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: transparent;
  font-family: var(--font-accent);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.cs-step.is-solved {
  border-color: rgba(47, 107, 69, 0.35);
  background: var(--cs-right-soft);
  color: var(--cs-right);
}

.cs-step.is-active {
  border-color: var(--text);
  color: var(--text);
}

.cs-step.is-viewing {
  border-color: var(--text);
  background: var(--text);
  color: var(--accent);
}

.cs-step:not(:disabled):not(.is-viewing):hover {
  border-color: var(--accent-strong);
  color: var(--accent-ink);
}

.cs-step:disabled {
  border-style: dashed;
  opacity: 0.5;
  cursor: not-allowed;
}

.cs-step:focus-visible,
.cs-btn-ghost:focus-visible,
.cs-link:focus-visible,
.cs-option:has(input:focus-visible) {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

.cs-card {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.cs-card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.cs-status {
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 218, 61, 0.3);
  font-family: var(--font-accent);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  white-space: nowrap;
}

.cs-status.is-solved {
  background: var(--cs-right-soft);
  color: var(--cs-right);
}

.cs-question {
  margin-bottom: 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-style: italic;
  line-height: 1.25;
  color: var(--text);
}

.cs-question:focus {
  outline: none;
}

.cs-helper {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.cs-options {
  display: grid;
  gap: 0.5rem;
  min-width: 0;
  margin: 1rem 0 0;
  padding: 0;
  border: 0;
}

.cs-option {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
  font-size: 0.92rem;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.cs-option:hover {
  border-color: var(--accent-strong);
}

.cs-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.cs-option__key {
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--cs-paper);
  font-family: var(--font-accent);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
}

.cs-option:has(input:checked) {
  border-color: var(--text);
  background: rgba(255, 218, 61, 0.3);
  box-shadow: inset 4px 0 0 var(--accent-strong);
}

.cs-option:has(input:checked) .cs-option__key {
  border-color: var(--text);
  background: var(--text);
  color: var(--accent);
}

.cs-options:disabled .cs-option {
  cursor: default;
  opacity: 0.55;
}

.cs-options:disabled .cs-option:hover {
  border-color: var(--border);
}

.cs-options .cs-option.is-correct {
  border-color: rgba(47, 107, 69, 0.5);
  background: var(--cs-right-soft);
  box-shadow: inset 4px 0 0 var(--cs-right);
  opacity: 1;
}

.cs-options .cs-option.is-correct .cs-option__key {
  border-color: var(--cs-right);
  background: var(--cs-right);
  color: #fff;
}

.cs-options.is-wrong {
  animation: cs-shake 0.42s ease-in-out;
}

@keyframes cs-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(2px); }
}

.cs-feedback {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.cs-feedback:empty {
  display: none;
}

.cs-feedback[data-tone="right"] { color: var(--cs-right); }
.cs-feedback[data-tone="wrong"] { color: var(--cs-wrong); }
.cs-feedback[data-tone="warn"] { color: var(--accent-ink); }

.cs-answer {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.cs-unlock {
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--accent-strong);
  background: rgba(255, 218, 61, 0.22);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text);
}

.cs-explain {
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
}

.cs-explain > summary {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  cursor: pointer;
}

.cs-explain > summary::-webkit-details-marker {
  display: none;
}

.cs-explain > summary::after {
  content: '+';
  font-family: var(--font-accent);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--accent-ink);
}

.cs-explain[open] > summary::after {
  content: '–';
}

.cs-explain > p {
  padding: 0 0.9rem 0.85rem;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.cs-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.2rem;
}

.cs-actions .btn {
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
}

.cs-actions .cs-next-case {
  flex-basis: 100%;
  justify-content: center;
  text-align: center;
  white-space: normal;
}

.cs-cta {
  margin-left: auto;
}

.cs-btn-ghost {
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: none;
  font-family: var(--font-accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.cs-btn-ghost:hover {
  border-color: var(--text);
  color: var(--text);
}

.cs-link {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-weight: 600;
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.cs-hints {
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--border);
}

.cs-hints__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.cs-hints__head h4 {
  font-family: var(--font-accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-hints__count {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.cs-hints__intro {
  margin: 0.2rem 0 0.8rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.cs-hints__list {
  display: grid;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  padding: 0;
  list-style: none;
}

.cs-hint {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
}

.cs-hint:last-child {
  animation: cs-fade-in 0.35s ease-out;
}

.cs-hint__label {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.cs-hint p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text);
}

@keyframes cs-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* ----- Bottom: extended file (easter eggs, story recap, aftermath) ----- */

.cs-extras {
  margin-top: 4rem;
  scroll-margin-top: calc(var(--site-nav-height) + 4.5rem); /* clears the nav and the folder tab above the box */
}

.cs-extras__lock {
  padding: 1.1rem 1.2rem;
  border: 1px dashed var(--border);
  border-radius: 2px;
  background: rgba(242, 233, 212, 0.55);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.cs-extras__teaser {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.cs-extras__teaser li {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  opacity: 0.6;
}

.cs-extras__teaser strong,
.cs-acc__titles strong {
  font-family: var(--font-accent);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-extras__teaser small,
.cs-acc__titles small {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cs-acc {
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
}

.cs-acc + .cs-acc {
  margin-top: 0.75rem;
}

.cs-acc > summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  list-style: none;
  cursor: pointer;
}

.cs-acc > summary::-webkit-details-marker {
  display: none;
}

.cs-acc > summary:hover .cs-acc__icon {
  color: var(--accent-strong);
}

.cs-acc__mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  background: var(--text);
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--accent);
}

.cs-acc__titles {
  display: grid;
  flex: 1;
  gap: 0.1rem;
}

.cs-acc__icon {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--accent-ink);
  transition: transform 0.2s;
}

.cs-acc[open] .cs-acc__icon {
  transform: rotate(45deg);
}

.cs-acc__body {
  max-width: 74ch;
  padding: 0.25rem 1.2rem 1.4rem calc(1.2rem + 42px + 1rem);
}

.cs-acc__body h4 {
  margin: 1.4rem 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text);
}

.cs-acc__body h4:first-child {
  margin-top: 0.5rem;
}

.cs-acc__body h5 {
  margin: 1rem 0 0.35rem;
  font-family: var(--font-accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-acc__body p,
.cs-acc__body li {
  margin-bottom: 0.7rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text);
}

.cs-acc__body ul {
  padding-left: 1.2rem;
}

.cs-reset {
  margin-top: 2rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.cs-reset__eyebrow {
  margin-bottom: 0.4rem;
  font-family: var(--font-accent);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cs-reset__line {
  margin-bottom: 0.9rem;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--text);
}

/* ----- Responsive ----- */

/* ----- Paywall (Trọng điểm 3–5, payOS) ----- */

.cs-feedback[data-tone="info"] { color: var(--text-muted); }

.cs-step.is-paywall {
  font-size: 0.75rem;
}

.cs-paywall__list {
  margin: 0.9rem 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.cs-paywall__list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text);
}

.cs-paywall__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--cs-right);
}

.cs-paywall__price {
  padding: 0.8rem 0.9rem;
  border-left: 3px solid var(--accent-strong);
  background: rgba(255, 218, 61, 0.22);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.cs-paywall__price strong {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--text);
}

.cs-paywall__note {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.cs-redeem {
  margin-top: 1.4rem;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--border);
}

.cs-redeem__label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.cs-redeem__row {
  display: flex;
  gap: 0.5rem;
}

.cs-redeem__input {
  flex: 1;
  min-width: 0;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
  font-family: var(--font-accent);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
}

.cs-redeem__input:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 1px;
}

.cs-code-note {
  margin-top: 1.25rem;
  padding: 0.7rem 0.9rem;
  border: 1px dashed var(--border);
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.cs-code-note strong {
  font-family: var(--font-accent);
  letter-spacing: 0.08em;
  color: var(--text);
  user-select: all;
}

/* ----- Case 02 offer (case-upsell.js) ----- */

body.cu-lock {
  overflow: hidden;
}

.cu-dialog {
  width: min(680px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  margin: auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fbf6ea;
  color: var(--text);
  box-shadow: 0 24px 60px rgba(20, 14, 4, 0.35);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.cu-dialog::backdrop {
  background: rgba(20, 14, 4, 0.55);
}

.cu-dialog[open] {
  animation: cu-in 0.25s ease-out;
}

@keyframes cu-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.cu-card {
  position: relative;
  padding: 1.5rem;
}

.cu-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  font-size: 1rem;
  color: var(--text-muted);
  cursor: pointer;
}

.cu-close:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--text);
}

.cu-close:focus-visible,
.cu-slot-card a:focus-visible,
.cu-slot-card button:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 4px;
}

.cu-dialog .cu-title:focus {
  outline: none;
}

.cu-hero {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.cu-hero__img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
}

.cu-eyebrow {
  font-family: var(--font-accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.cu-title {
  margin: 0.3rem 2rem 0.4rem 0;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-style: italic;
  line-height: 1.2;
}

.cu-product {
  font-size: 0.95rem;
}

.cu-desc {
  margin-top: 0.4rem;
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.cu-stats {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.cu-price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.6rem;
  margin-top: 0.75rem;
  padding: 0.6rem 0.8rem;
  border-left: 3px solid var(--accent-strong);
  background: rgba(255, 218, 61, 0.22);
}

.cu-price strong {
  font-family: var(--font-serif);
  font-size: 1.45rem;
}

.cu-price s {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cu-price span {
  flex-basis: 100%;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.cu-fields {
  margin: 1.4rem 0 0;
  padding: 1.1rem 0 0;
  border: 0;
  border-top: 1px dashed var(--border);
  display: grid;
  gap: 0.8rem;
}

.cu-legend {
  padding: 0;
  font-size: 0.9rem;
  font-weight: 700;
}

.cu-field__label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.cu-field input,
.cu-field textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  resize: vertical;
}

.cu-field input:focus-visible,
.cu-field textarea:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 1px;
}

.cu-field [aria-invalid="true"] {
  border-color: var(--cs-wrong, #9b3a26);
}

.cu-field__error {
  margin-top: 0.25rem;
  font-size: 0.78rem;
  color: #9b3a26;
}

.cu-field__error:empty {
  display: none;
}

.cu-methods {
  margin: 1.1rem 0 0;
  padding: 0;
  border: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.cu-methods .cu-legend {
  grid-column: 1 / -1;
  margin-bottom: 0.1rem;
}

.cu-method {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.cu-method input {
  margin-top: 0.2rem;
  accent-color: var(--text);
}

.cu-method:has(input:checked) {
  border-color: var(--text);
  background: rgba(255, 218, 61, 0.18);
}

.cu-method:has(input:focus-visible) {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

.cu-method__body {
  display: grid;
  gap: 0.15rem;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.cu-method__body strong {
  font-size: 0.88rem;
  color: var(--text);
}

.cu-field__hint {
  margin-top: 0.25rem;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.cu-done .cu-desc {
  display: block;
  font-size: 0.92rem;
}

.cu-done .cu-price span {
  flex-basis: auto;
}

.cu-dialog [hidden] {
  display: none !important;
}

.cu-feedback {
  margin-top: 0.8rem;
  font-size: 0.85rem;
}

.cu-feedback:empty {
  display: none;
}

.cu-feedback[data-tone="wrong"] { color: #9b3a26; }
.cu-feedback[data-tone="info"] { color: var(--text-muted); }

.cu-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.cu-actions .btn {
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
}

.cu-submit:disabled {
  cursor: wait;
  opacity: 0.65;
}

.cu-note {
  margin-top: 0.75rem;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--text-muted);
  text-align: right;
}

.cu-slot {
  margin-top: clamp(2rem, 5vw, 4rem);
}

.cu-slot-card {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-top: 2px solid var(--text);
  border-bottom: 1px solid var(--border);
  background: #f4ecd9;
}

.cu-slot-card__visual {
  position: relative;
  display: block;
  min-width: 0;
  color: inherit;
}

.cu-slot-card__stamp {
  position: absolute;
  z-index: 1;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.45rem 0.6rem;
  background: var(--accent-strong);
  color: var(--text);
  font-family: var(--font-accent);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transform: rotate(-3deg);
}

.cu-slot-card__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: contain;
  background: #fff;
}

.cu-slot-card__text {
  min-width: 0;
}

.cu-slot-card__title {
  margin: 0.6rem 0 0.85rem;
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 3vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.cu-slot-card__product {
  font-size: 0.92rem;
}

.cu-slot-card__desc {
  max-width: 46ch;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.cu-slot-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin: 1rem 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-accent);
  font-size: 0.72rem;
}

.cu-slot-card__stats li + li::before {
  content: '/';
  margin-right: 0.9rem;
  color: var(--text-muted);
}

.cu-slot-card__price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.7rem;
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cu-slot-card__price strong {
  font-size: 1.65rem;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.cu-slot-card__price s {
  font-size: 0.9rem;
}

.cu-slot-card__price span {
  flex-basis: 100%;
}

.cu-slot-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  margin-top: 1.2rem;
}

.cu-slot-card__order {
  min-height: 44px;
  padding: 0.4rem 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  text-decoration: underline;
  text-underline-offset: 4px;
  cursor: pointer;
  transition: color 0.2s;
}

.cu-slot-card__order:hover {
  color: var(--accent-ink);
}

@media (max-width: 600px) {
  .cu-card {
    padding: 1.1rem;
  }

  .cu-hero {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0.9rem;
  }

  .cu-title {
    font-size: 1.3rem;
  }

  .cu-hero .cu-desc {
    display: none;
  }

  .cu-stats {
    font-size: 0.7rem;
    line-height: 1.5;
  }

  .cu-actions {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .cu-methods {
    grid-template-columns: 1fr;
  }

  .cu-note {
    text-align: left;
  }

  .cu-slot-card {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  .cu-slot-card__visual {
    width: min(100%, 340px);
    margin-inline: auto;
  }

  .cu-slot-card .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
    white-space: normal;
  }

  .cu-slot-card__actions {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cu-dialog[open] {
    animation: none;
  }
}

@media (max-width: 1024px) {
  .cs-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-panel {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .cs-jump {
    display: inline-flex;
  }
}

@media (max-width: 600px) {
  /* Give the document title the full row; the view/download buttons wrap underneath. */
  .cs-group .folder-file-item {
    align-items: flex-start;
  }

  .cs-group .ffi-info {
    flex: 1 1 0;
    min-width: 60%;
  }

  .cs-group .ffi-actions {
    margin-left: auto;
  }

  .cs-panel {
    padding: 1.1rem;
  }

  .cs-question {
    font-size: 1.3rem;
  }

  .cs-cta {
    margin-left: 0;
    width: 100%;
    text-align: center;
  }

  .cs-extras__teaser {
    grid-template-columns: minmax(0, 1fr);
  }

  .cs-acc > summary {
    padding: 0.9rem 1rem;
  }

  .cs-acc__body {
    padding: 0 1rem 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cs-group.is-just-unlocked,
  .cs-options.is-wrong,
  .cs-hint:last-child {
    animation: none;
  }

  .cs-bar > span {
    transition: none;
  }
}