@charset "UTF-8";
/* Numa Koudsie · simulation catalog (simulations.html)
   Loaded after site.css and paper.css. Follows the house design (DESIGN.md of Droplet Collection): Instrument Serif
   titles at weight 400 only, IBM Plex Sans text, IBM Plex Mono labels; the abstracts are set like a LaTeX write-up,
   in Latin Modern with KaTeX maths; every box has a visible 1 px outline; no card shadows. */

@import url('../fonts/instrument-plex.css');

:root {
  --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ================= top bar ================= */
.cat-top {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font: 12px var(--mono);
  letter-spacing: 0.06em;
}
.cat-top a {
  color: var(--ink-3);
}
.cat-top a:hover {
  color: var(--accent);
}
.cat-top nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
}

/* ================= masthead ================= */
.cat {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px 72px;
}
.cat__head {
  padding: 40px 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 24px 56px;
  align-items: end;
  border-bottom: 1px solid var(--line-strong);
}
.cat__kicker {
  margin: 0 0 12px;
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.cat__head h1 {
  margin: 0 0 18px;
  font: 400 clamp(56px, 8vw, 104px) / 0.95 var(--serif);
  letter-spacing: -0.012em;
}
.cat__head h1 .dot {
  color: var(--accent);
}
.cat__lede {
  margin: 0;
  max-width: 640px;
  font: italic 20px/1.5 var(--tex);
  color: var(--ink-2);
}
.cat__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.cat__stats li {
  padding: 4px 0 4px 16px;
  border-left: 1px solid var(--line-strong);
}
.cat__stats li:first-child {
  border-left: 0;
  padding-left: 0;
}
.cat__stats b {
  display: block;
  font: 400 44px/1 var(--serif);
  color: var(--ink);
}
.cat__stats span {
  display: block;
  margin-top: 6px;
  font: 500 10.5px var(--mono);
  color: var(--muted);
}

/* ================= search and filters ================= */
.cat__bar {
  position: sticky;
  top: 0;
  z-index: 20;
  margin: 0 -32px;
  padding: 12px 32px;
  background: rgba(245, 241, 234, 0.95);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: minmax(220px, 340px) auto minmax(0, 1fr);
  grid-template-areas:
    'search stage count'
    'field field field';
  gap: 10px 18px;
  align-items: center;
}
.cat__search {
  grid-area: search;
  position: relative;
}
.cat__search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}
.cat__search input {
  width: 100%;
  font: 15px var(--sans);
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 9px 40px 9px 36px;
  -webkit-appearance: none;
  appearance: none;
}
.cat__search input::placeholder {
  color: var(--muted);
}
.cat__search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(122, 31, 43, 0.14);
}
.cat__search input::-webkit-search-cancel-button {
  display: none;
}
.cat__search kbd {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font: 11px var(--mono);
  color: var(--muted);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0 6px;
  line-height: 18px;
  pointer-events: none;
}
.cat__search input:focus ~ kbd,
.cat__search input:not(:placeholder-shown) ~ kbd {
  display: none;
}
.cat__filters {
  display: contents;
}
.cat__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-width: 0;
}
#fields {
  grid-area: field;
}
#stages {
  grid-area: stage;
}
.chip {
  font: 13px var(--sans);
  line-height: 1;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.chip[aria-pressed='true'] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.chip small {
  font: 11px var(--mono);
  margin-left: 5px;
  opacity: 0.7;
}
.cat__count {
  grid-area: count;
  justify-self: end;
  margin: 0;
  font: 12px var(--mono);
  color: var(--ink-3);
  white-space: nowrap;
}

/* ================= entries: one paper abstract per simulation ================= */
.cat__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 28px;
}
.cat__list:empty {
  display: none;
}
.entry {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
}
.entry__fig {
  display: block;
  margin: 0;
  padding: 12px 12px 0;
}
.entry__plate {
  position: relative;
  display: block;
  aspect-ratio: 8 / 5;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  overflow: hidden;
}
.entry__plate img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.entry__ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font: 400 44px var(--serif);
  color: var(--accent);
}
.entry__cap {
  padding: 8px 16px 0;
  font: 14px/1.5 var(--tex);
  color: var(--ink-3);
}
.entry__cap b {
  margin-right: 8px;
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.entry__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 12px 20px 20px;
}
.entry__kicker {
  margin: 0 0 6px;
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.entry h3 {
  margin: 0 0 10px;
  font: 400 30px/1.1 var(--serif);
  color: var(--ink);
}
.entry h3 a {
  color: inherit;
}
.entry h3 a:hover {
  color: var(--accent);
  text-decoration: none;
}
.entry__abs {
  margin: 0 0 12px;
  font: 17px/1.62 var(--tex);
  color: var(--ink);
  hyphens: auto;
  -webkit-hyphens: auto;
}
.entry__eq {
  margin: 0 0 14px;
}
.entry__eq .katex-display {
  margin: 0;
  padding: 12px 12px;
  background: var(--quote);
  border-left: 2px solid var(--accent);
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
  overflow-y: hidden;
  position: relative;
}
.entry__eq .katex-display > .katex {
  display: block;
  width: max-content;
  min-width: 100%;
  font-size: 1.12em;
}
.entry__eq:not(.is-typeset) {
  visibility: hidden;
}
.entry__facts {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 5px 12px;
  margin: 0 0 14px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font: 15px/1.5 var(--tex);
}
.entry__facts dt {
  padding-top: 3px;
  font: 500 10.5px var(--mono);
  color: var(--muted);
}
.entry__facts dd {
  margin: 0;
  color: var(--ink-2);
}
.entry__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
}
.entry__tags li {
  font: 11px var(--mono);
  color: var(--ink-3);
  background: var(--quote);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 2px 7px;
}
.entry__foot {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
}
.entry__open {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font: 500 14px var(--sans);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.entry__open::after {
  content: '→';
}
.entry__open:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  text-decoration: none;
}
.entry__note {
  font: 500 14px var(--sans);
  color: var(--accent);
}

/* ================= empty state ================= */
.cat__empty {
  margin: 40px 0 0;
  padding: 26px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  text-align: center;
  font: 17px var(--tex);
  color: var(--ink-2);
}
.cat__empty button {
  font: inherit;
  color: var(--accent);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ================= how each note is built ================= */
.cat__anatomy {
  margin-top: 80px;
  padding-top: 26px;
  border-top: 1px solid var(--line-strong);
}
.cat__anatomy h2 {
  margin: 0 0 10px;
  font: 400 clamp(30px, 3.4vw, 42px) / 1.1 var(--serif);
}
.cat__anatomy > p {
  margin: 0 0 24px;
  max-width: 720px;
  font: 18px/1.65 var(--tex);
  color: var(--ink-2);
}
.cat__parts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.cat__parts li {
  padding: 16px 18px 14px;
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--accent);
  border-radius: 6px;
}
.cat__parts b {
  display: block;
  margin-bottom: 6px;
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.cat__parts h3 {
  margin: 0 0 8px;
  font: 400 23px/1.2 var(--serif);
}
.cat__parts p {
  margin: 0;
  font: 16px/1.6 var(--tex);
  color: var(--ink-2);
}
.cat-error {
  max-width: 1240px;
  margin: 24px auto;
  padding: 0 32px;
}

/* ================= responsive ================= */
@media (max-width: 1100px) {
  .cat__parts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 860px) {
  .cat__head {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 20px;
  }
  .cat__list {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 640px) {
  .cat-top,
  .cat {
    padding-left: 16px;
    padding-right: 16px;
  }
  .cat__bar {
    margin: 0 -16px;
    padding: 10px 16px 8px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      'search count'
      'chips chips';
    gap: 8px 12px;
  }
  .cat__filters {
    grid-area: chips;
    display: flex;
    gap: 12px;
    overflow-x: auto;
    margin: 0 -16px;
    padding: 2px 16px 4px;
    scrollbar-width: none;
  }
  .cat__filters::-webkit-scrollbar {
    display: none;
  }
  .cat__chips {
    flex: none;
    flex-wrap: nowrap;
  }
  #stages {
    padding-left: 12px;
    border-left: 1px solid var(--line-strong);
  }
  .cat__stats b {
    font-size: 34px;
  }
  .cat__lede {
    font-size: 18px;
  }
  .entry__body {
    padding: 10px 14px 16px;
  }
  .entry__cap {
    padding: 8px 14px 0;
  }
  .entry h3 {
    font-size: 27px;
  }
  .entry__abs {
    font-size: 16.5px;
  }
  .entry__facts {
    grid-template-columns: minmax(0, 1fr);
    gap: 0 0;
  }
  .entry__facts dd {
    margin-bottom: 6px;
  }
  .cat__parts {
    grid-template-columns: minmax(0, 1fr);
  }
  footer {
    padding-left: 16px;
    padding-right: 16px;
  }
}
@media (hover: none) {
  .cat__search kbd {
    display: none;
  }
  .cat__search input {
    padding-right: 12px;
  }
}