/* The paper room. Cream ground, white sheets, and ink -- the surface stays,
   the single-composer layout it used to hold does not. Colours are mixed from
   the brand tokens so both themes follow along. */
.paper-page {
  --paper-cream: color-mix(in oklab, var(--color-base-200) 68%, #f3ead8);
  --paper-sheet: color-mix(in oklab, var(--color-base-100) 88%, #fff8ee);
  --paper-ink: var(--color-base-content);
  --paper-rule: color-mix(in oklab, var(--color-base-content) 14%, transparent);
  --paper-edge: color-mix(in oklab, var(--color-neutral) 18%, var(--color-base-300));
  --paper-muted: color-mix(in oklab, var(--paper-ink) 60%, transparent);
  background:
    radial-gradient(circle at 12% 0%, color-mix(in oklab, var(--color-secondary) 10%, transparent), transparent 32%),
    var(--paper-cream);
  color: var(--paper-ink);
}

/* Hero ------------------------------------------------------------------ */

.paper-hero {
  border-bottom: 1px solid var(--paper-rule);
  background: color-mix(in oklab, var(--paper-sheet) 70%, transparent);
}

.paper-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.4rem;
  padding: 0;
  list-style: none;
}

.paper-steps__item {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: color-mix(in oklab, var(--paper-ink) 76%, transparent);
  font-size: 0.92rem;
  font-weight: 700;
}

/* The steps are a route, not a list: an arrow between them says so without
   another line of copy. */
.paper-steps__item + .paper-steps__item::before {
  content: "→";
  margin-right: 0.85rem;
  color: var(--paper-muted);
  font-weight: 400;
}

.paper-steps__num {
  display: grid;
  width: 1.55rem;
  height: 1.55rem;
  place-items: center;
  border-radius: 999px;
  background: color-mix(in oklab, var(--color-primary) 16%, transparent);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 800;
}

.paper-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--paper-edge);
  border-radius: 999px;
  padding: 0.4rem 0.5rem 0.4rem 0.9rem;
  background: var(--paper-sheet);
  font-size: 0.85rem;
  font-weight: 700;
  transition: border-color 140ms ease, color 140ms ease;
}

.paper-pill:hover,
.paper-pill:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.paper-pill__count {
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  background: color-mix(in oklab, var(--color-base-content) 8%, transparent);
  color: var(--paper-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

/* A fan of sheets on a desk. Decorative, untouchable, and faded out at the
   bottom rather than sliced, so the clip reads as depth instead of damage. */
.paper-hero__stack {
  position: relative;
  height: 19rem;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 68%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 68%, transparent 100%);
}

.paper-hero__stack-sheet {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  border: 1px solid var(--paper-edge);
  border-radius: 0.4rem;
  background: #fff;
  object-fit: cover;
  object-position: top center;
  box-shadow: 0 1.4rem 3rem color-mix(in oklab, var(--color-neutral) 22%, transparent);
}

.paper-hero__stack-sheet--0 { left: 0; transform: rotate(-6deg); }
.paper-hero__stack-sheet--1 { left: 24%; transform: rotate(0.5deg); z-index: 1; }
.paper-hero__stack-sheet--2 { left: 48%; transform: rotate(6.5deg); }

/* Shelves --------------------------------------------------------------- */

.paper-shelf__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  border-bottom: 1px solid var(--paper-rule);
  padding-bottom: 0.9rem;
}

.paper-shelf__count {
  color: var(--paper-muted);
  font-weight: 700;
  white-space: nowrap;
}

/* auto-fill, not a fixed column count: a shelf holding one page must not
   stretch it across the room. */
.paper-shelf__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18.5rem, 1fr));
  gap: 1.25rem;
  list-style: none;
  padding: 0;
}

/* Cards ----------------------------------------------------------------- */

.paper-card {
  display: flex;
  height: 100%;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--paper-edge);
  border-radius: 0.9rem;
  background: var(--paper-sheet);
  text-align: left;
  transition: border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

a.paper-card:hover,
a.paper-card:focus-visible {
  border-color: color-mix(in oklab, var(--color-primary) 55%, var(--paper-edge));
  transform: translateY(-3px);
  box-shadow: 0 1rem 2rem color-mix(in oklab, var(--color-neutral) 14%, transparent);
}

.paper-card:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* The thumbnail is a page resting on a desk: its own edges show, and the
   bottom fades instead of being cut, so a top crop reads as "there is more
   page below" rather than a broken image. */
.paper-card__sheet {
  position: relative;
  display: block;
  overflow: hidden;
  height: 11.5rem;
  padding: 0.7rem 0.7rem 0;
  background:
    radial-gradient(circle at 50% 0%, color-mix(in oklab, var(--color-neutral) 8%, transparent), transparent 60%),
    color-mix(in oklab, var(--color-neutral) 6%, var(--paper-cream));
}

.paper-card__sheet img {
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid var(--paper-edge);
  border-bottom: 0;
  border-radius: 0.25rem 0.25rem 0 0;
  background: #fff;
  object-fit: cover;
  /* The top of the sheet is the part that says what it is. */
  object-position: top center;
  box-shadow: 0 0.5rem 1.2rem color-mix(in oklab, var(--color-neutral) 16%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, #000 72%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 72%, transparent 100%);
}

.paper-card__mark {
  display: grid;
  height: 100%;
  place-items: center;
  color: var(--color-primary);
  font-size: 2.4rem;
  font-weight: 900;
}

.paper-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.95rem 1.05rem 1.1rem;
}

.paper-card__name { font-size: 1.02rem; font-weight: 800; }
.paper-card__note { color: var(--paper-muted); }
.paper-card__description { color: color-mix(in oklab, var(--paper-ink) 68%, transparent); }

.paper-card__go {
  margin-top: auto;
  padding-top: 0.7rem;
  color: var(--color-primary);
  font-weight: 700;
}

.paper-card__go span { transition: transform 140ms ease; display: inline-block; }
a.paper-card:hover .paper-card__go span { transform: translateX(3px); }

/* Paper on the way. A quiet strip, not a grid of empty boxes: a placeholder
   card stretches to the height of a real one and leaves a hole in the shelf. */
.paper-soon {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem 0.9rem;
  border-top: 1px dashed color-mix(in oklab, var(--paper-edge) 75%, transparent);
  padding-top: 0.9rem;
}

.paper-soon__label {
  color: var(--paper-muted);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.paper-soon__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-soon__item {
  border: 1px dashed color-mix(in oklab, var(--paper-edge) 85%, transparent);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  background: color-mix(in oklab, var(--paper-sheet) 50%, transparent);
  color: color-mix(in oklab, var(--paper-ink) 62%, transparent);
  font-size: 0.85rem;
  font-weight: 700;
}

/* Maker page ------------------------------------------------------------ */

.paper-crumbs { color: var(--paper-muted); }
.paper-crumbs a { font-weight: 700; }
.paper-crumbs a:hover { color: var(--color-primary); }
.paper-crumbs span { margin: 0 0.45rem; }

.paper-maker__note {
  display: inline-flex;
  border: 1px solid var(--paper-edge);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  background: var(--paper-sheet);
  color: var(--paper-muted);
  font-weight: 700;
}

.paper-panel {
  border: 1px solid var(--paper-edge);
  border-radius: 1.1rem;
  padding: clamp(1.15rem, 3vw, 1.8rem);
  background: var(--paper-sheet);
}

.paper-field__label {
  display: block;
  color: color-mix(in oklab, var(--paper-ink) 78%, transparent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.paper-field__help {
  margin-top: 0.35rem;
  color: var(--paper-muted);
}

.paper-field__text,
.paper-field__number,
.paper-field__list {
  display: block;
  width: 100%;
  margin-top: 0.6rem;
  border: 1px solid var(--paper-edge);
  border-radius: 0.6rem;
  background: var(--color-base-100);
  color: var(--paper-ink);
  padding: 0.65rem 0.8rem;
  font-size: 1rem;
}

.paper-field__number { max-width: 8rem; }

.paper-field__list {
  min-height: 13rem;
  resize: vertical;
  /* Ruled like a notepad, because a list of words is what goes in it. */
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 1.85rem,
      color-mix(in oklab, var(--color-primary) 10%, transparent) 1.85rem,
      color-mix(in oklab, var(--color-primary) 10%, transparent) 1.9rem
    ),
    var(--color-base-100);
  line-height: 1.9rem;
}

.paper-field__text:focus,
.paper-field__number:focus,
.paper-field__list:focus {
  outline: 3px solid color-mix(in oklab, var(--color-primary) 32%, transparent);
  outline-offset: 2px;
  border-color: var(--color-primary);
}

.paper-field__reset {
  font-weight: 700;
  color: var(--color-primary);
}

.paper-field__reset:hover { text-decoration: underline; }

.paper-choice__option {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--paper-edge);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  background: var(--color-base-100);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.paper-choice__option:has(input:checked) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.paper-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  font-weight: 700;
}

.paper-chip {
  display: inline-flex;
  align-items: center;
  border: 1px dashed color-mix(in oklab, var(--color-primary) 35%, var(--paper-edge));
  border-radius: 999px;
  padding: 0.26rem 0.7rem;
  background: var(--color-base-100);
  font-size: 0.85rem;
  font-weight: 700;
}

.paper-note {
  border-left: 3px solid color-mix(in oklab, var(--color-secondary) 60%, transparent);
  padding-left: 0.75rem;
  color: var(--paper-muted);
}

/* Preview --------------------------------------------------------------- */

.paper-preview__sticky {
  position: sticky;
  top: 5rem;
}

.paper-preview__surface {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--paper-edge);
  border-radius: 1rem;
  padding: clamp(0.75rem, 2vw, 1.25rem);
  background:
    radial-gradient(circle at 80% 12%, color-mix(in oklab, var(--color-neutral) 10%, transparent), transparent 30%),
    color-mix(in oklab, var(--color-neutral) 7%, var(--paper-cream));
}

.paper-preview__image {
  width: min(100%, 34rem);
  border: 1px solid var(--paper-edge);
  background: #fff;
  box-shadow: 0 1.2rem 2.6rem color-mix(in oklab, var(--color-neutral) 22%, transparent);
  transition: opacity 160ms ease;
}

.is-working .paper-preview__image { opacity: 0.35; }

.paper-preview__working {
  position: absolute;
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  background: var(--color-base-100);
  color: var(--paper-ink);
  font-weight: 700;
  box-shadow: 0 0.6rem 1.4rem color-mix(in oklab, var(--color-neutral) 22%, transparent);
}

.paper-preview__status { color: var(--paper-muted); }

.paper-preview__error {
  border: 1px solid color-mix(in oklab, var(--color-error) 35%, transparent);
  border-radius: 0.6rem;
  padding: 0.75rem 0.9rem;
  background: color-mix(in oklab, var(--color-error) 10%, transparent);
  color: var(--color-error);
  font-weight: 700;
}

/* Uses and siblings ----------------------------------------------------- */

.paper-uses__list { list-style: none; padding: 0; }

.paper-uses__item {
  border-left: 3px solid color-mix(in oklab, var(--color-primary) 45%, transparent);
  padding: 0.1rem 0 0.1rem 0.85rem;
  color: color-mix(in oklab, var(--paper-ink) 72%, transparent);
}

@media (max-width: 1023px) {
  .paper-preview__sticky { position: static; }
  .paper-hero__stack { display: none; }
}

@media (max-width: 560px) {
  .paper-shelf__grid { grid-template-columns: 1fr; }
  .paper-card__sheet { height: 13rem; }
}

@media (prefers-reduced-motion: reduce) {
  .paper-card,
  .paper-card__go span,
  .paper-preview__image { transition: none; }
  a.paper-card:hover { transform: none; }
}