@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&display=swap");

/* Colors from the RW logo: dark plate, chrome, red heading arrow */
:root {
  --md-primary-fg-color: #16181d;
  --md-primary-fg-color--light: #2a2e36;
  --md-primary-fg-color--dark: #0f1115;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #dc2626;
  --md-accent-fg-color--transparent: rgba(220, 38, 38, 0.1);
}

[data-md-color-scheme="default"] {
  --md-typeset-a-color: #c62828;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #11141a;
  --md-primary-fg-color: #0f1115;
  --md-typeset-a-color: #f87171;
  --md-accent-fg-color: #ef4444;
}

/* Home page header */
.rw-hero {
  text-align: center;
  padding: 1rem 0 0.5rem;
}
.rw-hero h1 {
  margin: 0.6rem 0 0.4rem;
  font-weight: 700;
  font-size: 2.4rem;
}
.rw-hero p {
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}
.rw-hero .md-button {
  margin: 0.25rem;
}

/* Embedded simulator replays */
.rw-replay {
  margin: 1em 0 1.5em;
}
.rw-replay iframe {
  display: block;
  width: 100%;
  height: 640px;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.5rem;
  background: var(--md-default-bg-color);
}
.rw-replay__open {
  display: inline-block;
  margin-top: 0.4rem;
  font-size: 0.7rem;
}
.rw-replay--missing {
  padding: 1rem;
  border: 1px dashed var(--md-default-fg-color--lighter);
  border-radius: 0.5rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.75rem;
}

/* Headings in a rounder, friendlier font (loaded at the top of this file) */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.rwx-title {
  font-family: "Space Grotesk", var(--md-text-font-family), sans-serif;
  letter-spacing: -0.01em;
}
/* Bold, full-color page titles and section headings (Material's are thin and gray) */
.md-typeset h1 {
  font-weight: 700;
  color: var(--md-default-fg-color);
}
.md-typeset h2 {
  font-weight: 700;
}

/* Tips in the robot's blue instead of Material's teal, so every color on the site comes from
   the logo and the replays: red accents, chrome, blue robot */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-color: #3b82f6;
}
.md-typeset .tip > .admonition-title,
.md-typeset .tip > summary {
  background-color: rgba(59, 130, 246, 0.1);
}
.md-typeset .tip > .admonition-title::before,
.md-typeset .tip > summary::before {
  background-color: #3b82f6;
}

/* Bigger menu and sidebar text: Material's 0.7rem (14px) reads small */
.md-tabs__link {
  font-size: 0.8rem;
}
.md-nav {
  font-size: 0.78rem;
}
.md-nav--secondary {
  font-size: 0.74rem;
}

/* ---- Home page (prototype) ----------------------------------------------------------- */

/* Header: the RW plate at night, with field tiles behind the robot */
.rwx-hero {
  display: grid;
  /* A wider text column, so the three buttons fit on one line on a laptop */
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
  gap: 1.5rem;
  align-items: center;
  margin: 0.4rem 0 1.6rem;
  padding: 2rem 2rem 1.6rem;
  border-radius: 1.2rem;
  color: #e8eaee;
  background:
    radial-gradient(60% 70% at 85% 30%, rgba(239, 68, 68, 0.18), transparent 70%),
    linear-gradient(180deg, #1d2026, #0f1115);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset, 0 18px 40px -24px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}
.rwx-hero a:not(.md-button) {
  color: #fca5a5;
}
.rwx-kicker {
  margin: 0 0 0.6rem !important;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f87171;
}
.md-typeset .rwx-title {
  margin: 0 0 1rem;
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.12;
  color: #ffffff;
}
.rwx-glow {
  color: #f87171;
  text-shadow: 0 0 22px rgba(239, 68, 68, 0.55);
}
.rwx-hero__text > p {
  color: #c6cad2;
  max-width: 32rem;
}
.rwx-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.2rem 0 1rem;
}
/* Markdown puts the buttons in one paragraph, so that paragraph lays them out with the same gap */
.rwx-actions > p {
  display: flex;
  flex-wrap: wrap;
  gap: inherit;
  margin: 0;
}
.md-typeset .rwx-actions .md-button {
  margin: 0;
  border-radius: 999px;
  white-space: nowrap;
  padding: 0.6em 1.4em;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s;
}
.md-typeset .rwx-hero .md-button:not(.md-button--primary) {
  color: #e8eaee;
  border-color: rgba(255, 255, 255, 0.35);
}
.md-typeset .rwx-hero .md-button--primary,
.md-typeset .rwx-cta .md-button--primary {
  background: #dc2626;
  border-color: #dc2626;
  color: #ffffff;
}
.md-typeset .rwx-actions .md-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -10px rgba(239, 68, 68, 0.9);
}
/* Download count: a big number instead of a small badge, kept current by home.js */
.md-typeset a.rwx-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.15rem 0 0.15rem 0.7rem;
  border-left: 3px solid #ef4444;
  color: #e8eaee;
  transition: transform 0.15s ease;
}
.md-typeset a.rwx-stat:hover {
  color: #ffffff;
  transform: translateX(3px);
}
.rwx-stat b {
  font-family: "Space Grotesk", var(--md-text-font-family), sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.rwx-stat span {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #98a1b0;
}

.rwx-hero__art {
  position: relative;
}
.md-typeset .rwx-drive {
  display: block;
  width: 100%;
  max-width: 22rem;
  margin: 0 auto;
}
.rwx-tiles path {
  fill: none;
  stroke: rgba(255, 255, 255, 0.07);
  stroke-width: 2;
}
.rwx-plan {
  fill: none;
  stroke: rgba(255, 255, 255, 0.22);
  stroke-width: 3;
  stroke-dasharray: 0.012 0.012;
}
.rwx-ink {
  fill: none;
  stroke-width: 36;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}
.rwx-start {
  fill: #16181d;
  stroke: #8b9099;
  stroke-width: 8;
}
.rwx-bot rect {
  fill: rgba(94, 168, 255, 0.25);
  stroke: #5ea8ff;
  stroke-width: 4;
}
.rwx-bot path {
  fill: #5ea8ff;
}
.rwx-arrow {
  fill: #ef4444;
  stroke: #ef4444;
  stroke-width: 10;
  stroke-linejoin: round;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0.4);
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.3, 1.6, 0.5, 1);
  filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.8));
}
.rwx-done .rwx-arrow {
  opacity: 1;
  transform: scale(1);
}
.rwx-done .rwx-bot {
  opacity: 0;
  transition: opacity 0.5s ease 0.2s;
}
.rwx-readout {
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  margin-top: 0.5rem;
  font-family: var(--md-code-font-family);
  font-size: 0.65rem;
  color: #98a1b0;
}
.rwx-readout b {
  display: inline-block;
  min-width: 3.2em;
  color: #e8eaee;
  font-weight: 500;
}
.rwx-replay-btn {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.25rem 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-size: 0.6rem;
  color: #e8eaee;
  background: rgba(0, 0, 0, 0.3);
  cursor: pointer;
}
.rwx-replay-btn:hover {
  border-color: #f87171;
}

/* How it works: four waypoints joined by a dashed path */
.rwx-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.rwx-steps::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 1.2rem;
  right: 1.2rem;
  border-top: 2px dashed var(--md-accent-fg-color);
  opacity: 0.45;
}
.rwx-step {
  position: relative;
}
.rwx-step__n {
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  color: #ffffff;
  background: #dc2626;
  box-shadow: 0 0 0 0.3rem var(--md-default-bg-color), 0 0 18px rgba(239, 68, 68, 0.5);
}
.md-typeset .rwx-step p {
  margin: 0.5rem 0 0;
}

/* Feature cards lift a little and glow red on hover */
.md-typeset .rwx-cards > ul > li {
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.md-typeset .rwx-cards > ul > li:hover {
  transform: translateY(-3px);
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 12px 28px -18px rgba(239, 68, 68, 0.75);
}
.md-typeset .rwx-cards .twemoji.lg {
  color: var(--md-accent-fg-color);
  transition: transform 0.25s ease;
}
.md-typeset .rwx-cards > ul > li:hover .twemoji.lg {
  transform: rotate(-8deg) scale(1.12);
}
/* Three even columns on wide screens, two on tablets. With 10 cards, the last one becomes a
   full-width card on wide screens instead of sitting alone on its own row. */
.md-typeset .grid.rwx-cards > ul {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.md-typeset .grid.rwx-cards > ul > li:last-child:nth-child(3n + 1) {
  grid-column: 1 / -1;
  background:
    radial-gradient(60% 140% at 100% 50%, rgba(239, 68, 68, 0.1), transparent 70%),
    var(--md-default-bg-color);
}
/* Dark mode: cards on a slightly raised surface, so they don't melt into the page */
[data-md-color-scheme="slate"] .md-typeset .grid.rwx-cards > ul > li {
  background: #161a22;
  border-color: rgba(255, 255, 255, 0.08);
}
[data-md-color-scheme="slate"] .md-typeset .grid.rwx-cards > ul > li:last-child:nth-child(3n + 1) {
  background:
    radial-gradient(60% 140% at 100% 50%, rgba(239, 68, 68, 0.12), transparent 70%),
    #161a22;
}
@media screen and (max-width: 60em) {
  .md-typeset .grid.rwx-cards > ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .md-typeset .grid.rwx-cards > ul > li:last-child:nth-child(3n + 1) {
    grid-column: auto;
  }
}
/* Phones: one column of tighter cards, without the divider, so ten cards aren't a long scroll */
@media screen and (max-width: 44em) {
  .md-typeset .grid.rwx-cards > ul {
    grid-template-columns: 1fr;
  }
  .md-typeset .grid.rwx-cards > ul > li {
    padding: 0.6rem 0.8rem;
  }
  .md-typeset .grid.rwx-cards > ul > li > hr {
    display: none;
  }
  .md-typeset .grid.rwx-cards > ul > li > p {
    margin: 0.3rem 0;
  }
}

/* Home page section titles start with a red waypoint, like the steps and the logo's arrow */
.md-content:has(.rwx-hero) .md-typeset h2 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.35rem;
}
.md-content:has(.rwx-hero) .md-typeset h2::before {
  content: "";
  flex: none;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #dc2626;
  box-shadow: 0 0 0 0.22rem rgba(239, 68, 68, 0.18);
}
.md-content:has(.rwx-hero) .md-typeset h2 .headerlink {
  order: 2;
}

/* Discord call to action at the bottom */
.rwx-cta {
  margin: 2rem 0 1rem;
  padding: 1.4rem 1.6rem;
  border-radius: 1rem;
  background:
    radial-gradient(70% 120% at 100% 0%, rgba(239, 68, 68, 0.14), transparent 70%),
    var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
}
.md-typeset .rwx-cta h3 {
  margin-top: 0;
}

@media screen and (max-width: 52em) {
  /* Logo first, but small and tight enough that the headline and buttons fit on the first screen */
  .rwx-hero {
    grid-template-columns: 1fr;
    gap: 0.4rem;
    margin-top: 0;
    padding: 1rem 1.1rem 1.2rem;
  }
  .rwx-hero__art {
    order: -1;
  }
  .md-typeset .rwx-drive {
    max-width: 8rem;
  }
  .rwx-readout {
    margin-top: 0.2rem;
  }
  .rwx-kicker {
    margin-bottom: 0.3rem !important;
  }
  .md-typeset .rwx-title {
    margin-bottom: 0.6rem;
    font-size: 1.5rem;
  }
  .rwx-actions {
    gap: 0.4rem;
    margin: 0.8rem 0 0.7rem;
  }
  .md-typeset .rwx-actions .md-button {
    padding: 0.45em 1.2em;
  }
  .rwx-steps {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .rwx-steps::before {
    top: 1rem;
    bottom: 1rem;
    left: 1.05rem;
    right: auto;
    border-top: none;
    border-left: 2px dashed var(--md-accent-fg-color);
  }
  .rwx-step {
    padding-left: 3rem;
  }
  .rwx-step__n {
    position: absolute;
    left: 0;
    top: 0;
  }
}

/* ---- PID playground ------------------------------------------------------------------ */
.pid-playground {
  --pidp-target: #dc2626;
  --pidp-curve: #1f6feb;
  margin: 1rem 0 1.5rem;
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
}
[data-md-color-scheme="slate"] .pid-playground {
  --pidp-target: #f87171;
  --pidp-curve: #5ea8ff;
}
.pidp-stage {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.5fr);
  gap: 1rem;
  align-items: start;
}
.pidp-field {
  display: block;
  width: 100%;
  border-radius: 0.6rem;
  background: var(--md-default-bg-color);
}
.pidp-tile {
  stroke: var(--md-default-fg-color--lightest);
  stroke-width: 0.5;
}
.pidp-target-ray {
  stroke: var(--pidp-target);
  stroke-width: 1.5;
  stroke-dasharray: 3 3;
}
.pidp-trail {
  fill: none;
  stroke: var(--pidp-curve);
  stroke-width: 1.5;
  opacity: 0.6;
}
.pidp-body {
  fill: color-mix(in srgb, var(--pidp-curve) 22%, transparent);
  stroke: var(--pidp-curve);
  stroke-width: 1.5;
}
.pidp-wheel {
  fill: var(--md-default-fg-color--light);
}
.pidp-arrow {
  fill: var(--pidp-curve);
}
.pidp-chart {
  display: block;
  width: 100%;
  border-radius: 0.6rem;
  background: var(--md-default-bg-color);
}
.pidp-axis {
  stroke: var(--md-default-fg-color--lighter);
  stroke-width: 1;
}
.pidp-tick {
  fill: var(--md-default-fg-color--light);
  font-size: 10px;
  font-family: var(--md-code-font-family);
}
.pidp-band {
  fill: var(--pidp-target);
  opacity: 0.12;
}
.pidp-target-line {
  stroke: var(--pidp-target);
  stroke-width: 1.2;
  stroke-dasharray: 5 4;
}
.pidp-done-line {
  stroke: #2b8a3e;
  stroke-width: 1.2;
  stroke-dasharray: 2 3;
}
.pidp-curve {
  fill: none;
  stroke: var(--pidp-curve);
  stroke-width: 2.4;
  stroke-linejoin: round;
}
.pidp-cursor {
  fill: var(--pidp-curve);
  stroke: var(--md-default-bg-color);
  stroke-width: 2;
}
.pidp-verdict {
  margin-top: 0.6rem;
  padding: 0.5rem 0.7rem;
  border-radius: 0.5rem;
  font-size: 0.72rem;
  background: rgba(220, 38, 38, 0.1);
  border-left: 4px solid var(--pidp-target);
}
.pid-playground[data-verdict="good"] .pidp-verdict {
  background: rgba(43, 138, 62, 0.12);
  border-left-color: #2b8a3e;
}
.pidp-stats {
  display: flex;
  gap: 1.2rem;
  margin-top: 0.5rem;
  font-size: 0.68rem;
}
.pidp-stats span {
  display: block;
  color: var(--md-default-fg-color--light);
}
.pidp-stats b {
  font-family: var(--md-code-font-family);
  font-size: 0.8rem;
}
.pidp-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.9rem 1.2rem;
  margin-top: 1rem;
}
.pidp-slider label {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.75rem;
}
.pidp-slider output {
  font-family: var(--md-code-font-family);
  color: var(--md-accent-fg-color);
}
.pidp-slider input[type="range"],
.pidp-slider select {
  width: 100%;
  margin: 0.3rem 0 0.1rem;
  accent-color: var(--md-accent-fg-color);
}
.pidp-slider select {
  padding: 0.2rem;
  border-radius: 0.3rem;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
}
.pidp-slider small {
  display: block;
  line-height: 1.3;
  color: var(--md-default-fg-color--light);
}
.md-typeset .pidp-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}
.md-typeset .pidp-presets .md-button {
  margin: 0;
  padding: 0.3em 1em;
  font-size: 0.7rem;
  border-radius: 999px;
}
.pidp-code {
  position: relative;
  margin-top: 1rem;
  font-size: 0.68rem;
  color: var(--md-default-fg-color--light);
}
.md-typeset .pidp-code pre {
  margin: 0.3rem 0 0;
}
.pidp-copy {
  position: absolute;
  right: 0.5rem;
  bottom: 0.45rem;
  padding: 0.15rem 0.5rem;
  border-radius: 0.3rem;
  font-size: 0.6rem;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  cursor: pointer;
}
@media screen and (max-width: 44em) {
  .pidp-stage {
    grid-template-columns: 1fr;
  }
  .pidp-field-wrap {
    max-width: 14rem;
    margin: 0 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .md-typeset .rwx-cards > ul > li,
  .md-typeset .rwx-actions .md-button,
  .rwx-arrow {
    transition: none;
  }
}