tris-lab.css

/*
 * ════════════════════════════════════════════════════════════════
 *  Tri's Lab by FEAScript
 *  Finite Element Simulation in JavaScript
 *  https://lab.feascript.com
 *  MIT License © 2026 FEAScript
 * ════════════════════════════════════════════════════════════════
 */

/* The website's look, with a playful pixel accent */

:root {
  --font-pixel: "Jersey 10", "Roboto Mono", monospace;
  --outline: #1d1d1d;
}

html[data-theme="dark"] {
  --outline: #0b0b0e;
}

/* ─────────────────────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────────────────────── */
/* The hero fills the whole screen. Set here as well as in the website stylesheet, so the lab does not depend on
   which version of feascript.com is live */
.lab-hero .hero-inner {
  min-height: 100svh;
}

.lab-wordmark {
  gap: 0.12em;
}

.wordmark > svg.lab-tri {
  width: 0.92em;
  height: 0.9em;
  margin-right: 0.08em;
  overflow: visible;
}

/* Tri comes alive: a little hop and a blink */
.lab-tri .tri-up {
  animation: triHop 1.6s steps(1) infinite;
}

.lab-tri .tri-eyes {
  transform-box: fill-box;
  transform-origin: center;
  animation: triBlink 4.2s steps(1) infinite;
}

@keyframes triHop {
  0%,
  100% {
    transform: none;
  }
  50% {
    transform: translateY(-1px);
  }
}

@keyframes triBlink {
  0%,
  92%,
  100% {
    transform: none;
  }
  94% {
    transform: scaleY(0.15);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-tri .tri-up,
  .lab-tri .tri-eyes {
    animation: none;
  }
}

/* The feet stay visible on the dark theme */
html[data-theme="dark"] .lab-tri .tri-feet {
  fill: #e6e3da;
}

.lab-word {
  margin-left: 0.22em;
  color: var(--gold-ink);
}

.lab-pixel-tag {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

.lab-pixel-tag span {
  padding: 0.05rem 0.55rem;
  font-family: var(--font-pixel);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: #fff;
  border: 3px solid var(--outline);
  box-shadow: 3px 3px 0 var(--outline);
  animation: hop 2.4s steps(2) infinite;
}

.lab-pixel-tag span:nth-child(2) {
  animation-delay: 0.3s;
}

.lab-pixel-tag span:nth-child(3) {
  animation-delay: 0.6s;
}

.lab-pixel-tag span:nth-child(4) {
  animation-delay: 0.9s;
}

@keyframes hop {
  0%,
  80%,
  100% {
    transform: none;
  }
  90% {
    transform: translateY(-4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-pixel-tag span {
    animation: none;
  }
}

.b-heat {
  background: #c8003f;
}

.b-flow {
  background: #0086d4;
}

.b-structure {
  background: #00a86b;
}

.b-front {
  background: #d4aa00;
  color: #1d1d1d !important;
}

/* ─────────────────────────────────────────────────────────────
   GAME AND BLOCKS CARDS
   ───────────────────────────────────────────────────────────── */
.lab-card {
  display: flex;
  flex-direction: column;
}

.lab-shot {
  display: block;
  margin: 1.5rem 1.5rem 0;
  border: 3px solid var(--outline);
  box-shadow: 5px 5px 0 var(--outline);
  background: #181818;
  overflow: hidden;
  transition: transform 0.15s steps(3);
}

.lab-shot:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--phys, var(--gold));
}

.lab-shot img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top left;
  image-rendering: pixelated;
}

.lab-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem;
}

@media (min-width: 768px) {
  .lab-shot {
    margin: 2rem 2rem 0;
  }

  .lab-card-body {
    padding: 1.75rem 2rem 2rem;
  }
}

.lab-kind {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--faint);
}

.lab-kind span {
  padding: 0 0.45rem;
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--phys);
  border: 2px solid var(--outline);
}

.lab-card h3 {
  margin-top: 0.7rem;
  font-family: var(--font-pixel);
  font-size: 2.4rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--ink-strong);
  text-shadow: 3px 3px 0 color-mix(in srgb, var(--phys) 45%, transparent);
}

.lab-card-body > p:not(.lab-kind) {
  margin-top: 0.8rem;
  color: var(--muted);
}

.lab-card-body > p a {
  color: var(--gold-ink);
  text-decoration: underline;
}

.lab-list {
  margin: 1rem 0 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.lab-list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.95rem;
  color: var(--ink);
}

.lab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--phys);
  box-shadow: 2px 2px 0 var(--outline);
}

.lab-btn {
  margin-top: auto;
  padding: 0.45rem 1.1rem;
  font-family: var(--font-pixel);
  font-size: 1.45rem;
  letter-spacing: 0.03em;
  color: #fff;
  border: 3px solid var(--outline);
  box-shadow:
    inset -3px -3px 0 rgba(0, 0, 0, 0.25),
    inset 3px 3px 0 rgba(255, 255, 255, 0.3),
    4px 4px 0 var(--outline);
}

.lab-btn.heat {
  background: #c8003f;
}

.lab-btn.flow {
  background: #0086d4;
}

.lab-btn:hover {
  filter: brightness(1.1);
}

.lab-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--outline);
}

/* ─────────────────────────────────────────────────────────────
   IDEAS
   ───────────────────────────────────────────────────────────── */
.lab-idea {
  box-shadow: inset 0 4px 0 var(--phys);
}

/* Maths as usually set: variables in italic, matrices and vectors in bold italic, and numbers, operators and words
   upright */
.lab-eq {
  font-family: "STIX Two Math", "Cambria Math", "Latin Modern Math", "Times New Roman", serif;
  font-style: normal;
  font-size: 1.6rem;
  color: color-mix(in srgb, var(--phys) 75%, var(--ink));
}

/* ─────────────────────────────────────────────────────────────
   MEET TRI
   ───────────────────────────────────────────────────────────── */
.hero-lede a {
  color: var(--gold-ink);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.lab-meet-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  padding: 2.5rem 1.5rem;
  /* A pixel grid behind Tri, like the floor of the lab */
  background-color: var(--bg);
  background-image:
    linear-gradient(color-mix(in srgb, var(--gold) 14%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--gold) 14%, transparent) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Tri stands on a pale badge in both themes, so the dark outline and feet stay visible */
.lab-meet-badge {
  padding: 1.5rem 1.75rem 1.25rem;
  background: #f7e7b7;
  border: 3px solid var(--outline);
  box-shadow: 6px 6px 0 var(--outline);
}

/* On the pale badge the feet stay dark in the dark theme too */
html[data-theme="dark"] .lab-meet-badge .lab-tri .tri-feet {
  fill: #1d1d1d;
}

.lab-meet-svg {
  display: block;
  width: 11rem;
  height: auto;
  overflow: visible;
}

.lab-bubble {
  position: relative;
  max-width: 18rem;
  padding: 0.5rem 0.9rem;
  font-family: var(--font-pixel);
  font-size: 1.5rem;
  line-height: 1.1;
  text-align: center;
  color: #1d1d1d;
  background: #fff;
  border: 3px solid var(--outline);
  box-shadow: 4px 4px 0 var(--outline);
}

/* The tail of the speech bubble, pointing down at Tri: an outline triangle with a white one on top */
.lab-bubble::before,
.lab-bubble::after {
  content: "";
  position: absolute;
  left: 50%;
  border-style: solid;
  border-color: transparent;
  transform: translateX(-50%);
}

.lab-bubble::before {
  top: 100%;
  border-width: 16px 14px 0;
  border-top-color: var(--outline);
}

.lab-bubble::after {
  top: calc(100% - 1px);
  border-width: 11px 10px 0;
  border-top-color: #fff;
}

.lab-roles {
  justify-content: center;
  gap: 1.75rem;
}

.lab-role {
  padding-left: 1rem;
  border-left: 4px solid var(--phys);
}

.lab-role .desc {
  margin-top: 0.5rem;
}

.lab-role .desc a {
  color: var(--gold-ink);
  text-decoration: underline;
}

.lab-roles-title {
  color: var(--faint);
}

/* ─────────────────────────────────────────────────────────────
   MORE GAMES
   ───────────────────────────────────────────────────────────── */
.lab-more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 1.5rem;
  border-top: 1px solid var(--line);
  --phys: var(--phys-front);
}

.lab-more p:not(.lab-kind) {
  flex: 1 1 24rem;
  color: var(--muted);
}

.lab-more a {
  color: var(--gold-ink);
  text-decoration: underline;
}

@media (min-width: 768px) {
  .lab-more {
    padding: 1.75rem 2rem;
  }
}