/* Pluto.Studio — studio site
   Monochrome shell. Colour enters only through each app's own accent,
   passed in per-card as --app-accent. */

:root {
  --paper:      #FCFCFD;
  --paper-sunk: #F4F5F7;
  --ink:        #14161A;
  --ink-soft:   #3D424D;
  --muted:      #717785;
  --rule:       #E2E4EA;
  --rule-firm:  #C9CDD7;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  --measure: 60ch;
  --pad: clamp(1.25rem, 5vw, 2.5rem);
  --shell: 60rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #0E0F13;
    --paper-sunk: #16181E;
    --ink:        #EDEEF2;
    --ink-soft:   #C0C4CF;
    --muted:      #878DA0;
    --rule:       #262932;
    --rule-firm:  #3A3E4A;
  }
}

:root[data-theme="dark"] {
  --paper:      #0E0F13;
  --paper-sunk: #16181E;
  --ink:        #EDEEF2;
  --ink-soft:   #C0C4CF;
  --muted:      #878DA0;
  --rule:       #262932;
  --rule-firm:  #3A3E4A;
}

:root[data-theme="light"] {
  --paper:      #FCFCFD;
  --paper-sunk: #F4F5F7;
  --ink:        #14161A;
  --ink-soft:   #3D424D;
  --muted:      #717785;
  --rule:       #E2E4EA;
  --rule-firm:  #C9CDD7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* ---------- masthead ---------- */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.75rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.wordmark .dot { color: var(--muted); }

/* Pluto mark: one disc, split by a terminator into lit crescent and shadow.
   Both halves are currentColor at different opacities, so it inverts with
   the theme without a second asset. */
.mark {
  width: 1.3rem;
  height: 1.3rem;
  flex: none;
  display: block;
}

.masthead nav {
  display: flex;
  gap: 1.5rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.masthead nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 140ms ease;
}

.masthead nav a:hover { color: var(--ink); }

/* ---------- intro ---------- */

.intro { padding-block: clamp(3.5rem, 11vw, 7rem) clamp(2.5rem, 7vw, 4rem); }

.intro h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.9rem, 5.2vw, 3rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
  text-wrap: balance;
  max-width: 22ch;
}

.intro p {
  margin: 0;
  max-width: var(--measure);
  color: var(--ink-soft);
  text-wrap: pretty;
}

.intro p + p { margin-top: 1rem; }

/* ---------- section headers ---------- */

.rule-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule-firm);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- catalogue ---------- */

.catalogue {
  padding-block: clamp(2rem, 6vw, 3rem) clamp(3rem, 8vw, 5rem);
}

.entries {
  display: flex;
  flex-direction: column;
  margin-top: 0;
}

/* Each entry carries its own colour, sampled from that app's icon and tuned
   to clear 4.5:1 on both grounds. The shell stays monochrome; the palette of
   the page is the palette of the work. */

.entry {
  --app-accent: var(--accent-light, var(--ink));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.4rem 2rem;
  padding-block: 2rem;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  position: relative;
  transition: background-color 160ms ease;
}

@media (prefers-color-scheme: dark) {
  .entry { --app-accent: var(--accent-dark, var(--ink)); }
}

/* the explicit toggle must win over the media query, in both directions */
:root[data-theme="dark"]  .entry { --app-accent: var(--accent-dark, var(--ink)); }
:root[data-theme="light"] .entry { --app-accent: var(--accent-light, var(--ink)); }

.entry:hover { background: var(--paper-sunk); }

.entry::before {
  content: "";
  position: absolute;
  left: calc(var(--pad) * -0.5);
  top: 2rem;
  bottom: 2rem;
  width: 2px;
  background: var(--app-accent);
  opacity: 0;
  transition: opacity 160ms ease;
}

.entry:hover::before { opacity: 1; }

.entry-name {
  grid-column: 1;
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--app-accent);
}

.entry-meta {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  padding-top: 0.4rem;
}

.entry-desc {
  grid-column: 1 / -1;
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: 0.97rem;
  text-wrap: pretty;
}

.entry-stats {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.entry-stats b {
  color: var(--app-accent);
  font-weight: 500;
}

@media (max-width: 34rem) {
  .entry { grid-template-columns: 1fr; }
  .entry-meta { grid-column: 1; grid-row: auto; padding-top: 0; }
}

/* Not yet released: rendered as a div, never an anchor. A card that cannot be
   clicked must not look clickable. */

.entry--soon { cursor: default; }
.entry--soon:hover { background: transparent; }
.entry--soon:hover::before { opacity: 0; }
.entry--soon .entry-name { color: var(--muted); }

.pill {
  display: inline-block;
  margin-left: 0.6rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--app-accent);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--app-accent);
  vertical-align: 0.25em;
}

/* fan-made / unofficial disclaimers and similar small print */
.entry-note {
  grid-column: 1 / -1;
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  line-height: 1.5;
  color: var(--muted);
}

/* second and later catalogue sections sit tighter under the first */
.catalogue + .catalogue { padding-top: 0; }

/* ---------- next / about ---------- */

.slab {
  background: var(--paper-sunk);
  border-block: 1px solid var(--rule);
  padding-block: clamp(3rem, 8vw, 4.5rem);
}

.slab h2 {
  margin: 1.5rem 0 1rem;
  font-size: clamp(1.35rem, 3.4vw, 1.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-wrap: balance;
  max-width: 24ch;
}

.slab p {
  margin: 0;
  max-width: var(--measure);
  color: var(--ink-soft);
  text-wrap: pretty;
}

.slab p + p { margin-top: 1rem; }

/* shared prose pair, used inside .slab and .catalogue alike */

.lede-h2 {
  margin: 1.5rem 0 1rem;
  font-size: clamp(1.35rem, 3.4vw, 1.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-wrap: balance;
  max-width: 24ch;
}

.lede-p {
  margin: 0;
  max-width: var(--measure);
  color: var(--ink-soft);
  text-wrap: pretty;
}

.lede-p + .lede-p { margin-top: 1rem; }

.mailto {
  display: inline-block;
  margin-top: 1.75rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-firm);
  padding-bottom: 2px;
  transition: border-color 140ms ease;
}

.mailto:hover { border-color: var(--ink); }

/* ---------- footer ---------- */

footer {
  padding-block: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}