/* OpenGP's site: the launcher's look (its Theme.qml) on the web.
   Night asphalt, marquee yellow for the one thing to press, GP 2's blue for links,
   the trailer's red for the wordmark, one rounded typeface in two weights. */

@font-face {
  font-family: "M PLUS Rounded 1c";
  src: url("../fonts/MPLUSRounded1c-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "M PLUS Rounded 1c";
  src: url("../fonts/MPLUSRounded1c-ExtraBold.ttf") format("truetype");
  font-weight: 800;
  font-display: swap;
}

:root {
  --asphalt: #1d2331;
  --asphalt-deep: #151a25;
  --panel: #272f41;
  --panel-hover: #313a4f;
  --line: #3a4459;
  --marquee: #ffc629;
  --marquee-dark: #e0a800;
  --ink-on-marquee: #1b1405;
  --blue: #3b9bef;
  --blue-soft: #8cc4f5;
  --red: #e5243b;
  --green: #3fbf74;
  --chalk: #f2f4f8;
  --dim: #98a3b6;
  --faint: #6b768a;

  --font: "M PLUS Rounded 1c", "Hiragino Maru Gothic ProN", "Segoe UI", system-ui, sans-serif;
  /* Type scale: 16 px base, ratio 1.25. */
  --t-small: 0.875rem;
  --t-body: 1.0625rem;
  --t-lead: 1.25rem;
  --t-title: 1.5625rem;
  --t-heading: clamp(1.75rem, 1.3rem + 1.6vw, 2.44rem);
  --t-display: clamp(2.75rem, 1.6rem + 5.2vw, 5.5rem);

  --radius: 10px;
  --radius-small: 7px;
  --gap: 16px;
  --measure: 64ch;
  --wrap: 1160px;
  --pad: clamp(16px, 4vw, 36px);
}

* { box-sizing: border-box; }

html {
  background: var(--asphalt);
  color: var(--chalk);
  font-family: var(--font);
  font-size: 100%;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 76px;
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  font-size: var(--t-body);
}

img, video { max-width: 100%; height: auto; display: block; }

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { color: var(--blue-soft); }

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3 {
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
h2 { font-size: var(--t-heading); }
h3 { font-size: var(--t-title); line-height: 1.2; }

p { margin: 0; }
p + p { margin-top: 0.85em; }

.measure { max-width: var(--measure); }

.skip {
  position: absolute;
  left: 8px;
  top: -60px;
  padding: 10px 14px;
  background: var(--marquee);
  color: var(--ink-on-marquee);
  border-radius: var(--radius-small);
  font-weight: 800;
  z-index: 100;
}
.skip:focus { top: 8px; }

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

/* ---- Wordmark ------------------------------------------------------- */

.wordmark {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  color: var(--chalk);
  text-decoration: none;
  line-height: 1;
  transform: skewX(-9deg);
  letter-spacing: -0.02em;
}
.wordmark:hover { color: var(--chalk); }
.wordmark .gp {
  display: inline-block;
  margin-left: 0.08em;
  padding: 0.1em 0.18em 0.1em 0.14em;
  background: var(--red);
  color: #fff;
  border-radius: 2px;
}

/* ---- Top bar -------------------------------------------------------- */

.top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--asphalt-deep) 86%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.top .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}
.top .wordmark { font-size: 1.5rem; }
.top nav { margin-left: auto; display: flex; gap: 4px; }
.top nav a {
  color: var(--dim);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: var(--radius-small);
  font-size: var(--t-small);
}
.top nav a:hover { color: var(--chalk); background: var(--panel); }
.top .button { margin-left: 8px; }
@media (max-width: 900px) {
  .top nav { display: none; }
  .top .button { margin-left: auto; }
}

/* ---- Buttons -------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 10px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.button.primary {
  background: var(--marquee);
  color: var(--ink-on-marquee);
}
.button.primary:hover { background: var(--marquee-dark); color: var(--ink-on-marquee); }
.button.quiet {
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  border-color: var(--line);
  color: var(--chalk);
}
.button.quiet:hover { background: var(--panel-hover); color: var(--chalk); }
.button.small { min-height: 38px; padding: 6px 14px; font-size: var(--t-small); }
.button .os { font-weight: 400; color: inherit; opacity: 0.8; }
.button .os:empty { display: none; }

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

.hero {
  position: relative;
  min-height: min(92vh, 980px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}
.hero .loop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: var(--asphalt-deep) url("../img/hero-poster.jpg") center / cover no-repeat;
}
.hero .loop video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero .shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(to top, var(--asphalt) 0%, color-mix(in srgb, var(--asphalt) 78%, transparent) 34%, color-mix(in srgb, var(--asphalt) 20%, transparent) 70%, color-mix(in srgb, var(--asphalt-deep) 45%, transparent) 100%),
    linear-gradient(to right, color-mix(in srgb, var(--asphalt-deep) 70%, transparent), transparent 65%);
}
.hero .wrap {
  width: 100%;
  padding-top: 120px;
  padding-bottom: clamp(40px, 7vh, 88px);
}
.hero h1 {
  font-size: var(--t-display);
  max-width: 12ch;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
}
.hero .lead {
  margin-top: 22px;
  max-width: 54ch;
  font-size: var(--t-lead);
  color: var(--chalk);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}
.hero .actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero .note {
  margin-top: 18px;
  color: var(--dim);
  font-size: var(--t-small);
  max-width: 60ch;
}
.hero .note a { color: var(--blue-soft); }
@media (prefers-reduced-motion: reduce) {
  .hero .loop video { display: none; }
}

/* ---- Sections ------------------------------------------------------- */

.section { padding-block: clamp(56px, 8vw, 104px); }
.section + .section { border-top: 1px solid var(--line); }
.section-head { max-width: var(--measure); }
.section-head p { margin-top: 14px; color: var(--dim); font-size: var(--t-lead); }
.section .body { margin-top: 36px; }

/* ---- Trailer -------------------------------------------------------- */

.trailer video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: #000;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}
/* A quiet line under a video or a gallery. */
.under {
  margin-top: 14px;
  color: var(--dim);
  font-size: var(--t-small);
}

/* ---- How it works --------------------------------------------------- */

.how {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
@media (max-width: 860px) {
  .how { grid-template-columns: 1fr; }
}
.how .prose p + p { margin-top: 1em; }

/* The pipeline is a real sequence, so it is numbered and connected. */
.pipeline {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: stage;
  position: relative;
}
.pipeline li {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  padding-bottom: 26px;
  counter-increment: stage;
}
.pipeline li::before {
  content: counter(stage);
  grid-row: 1 / span 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--chalk);
  font-weight: 800;
  display: grid;
  place-items: center;
  z-index: 1;
}
.pipeline strong, .pipeline span { grid-column: 2; }
.pipeline li:last-child::before { background: var(--marquee); color: var(--ink-on-marquee); border-color: var(--marquee); }
.pipeline li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 40px;
  bottom: 0;
  border-left: 2px dashed var(--line);
}
.pipeline li:last-child { padding-bottom: 0; }
.pipeline strong { display: block; font-weight: 800; line-height: 40px; }
.pipeline span { color: var(--dim); font-size: var(--t-small); display: block; margin-top: 2px; }
.pipeline code { font-family: ui-monospace, Consolas, "SF Mono", monospace; font-size: 0.92em; color: var(--chalk); }

/* ---- Spec sheet ----------------------------------------------------- */

.spec {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(24px, 4vw, 56px);
}
@media (max-width: 760px) {
  .spec { grid-template-columns: 1fr; }
}
.spec .row {
  display: grid;
  grid-template-columns: minmax(118px, 0.34fr) 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.spec dt { font-weight: 800; color: var(--chalk); }
.spec dd { margin: 0; color: var(--dim); }
.spec dd b { color: var(--chalk); font-weight: 400; }

/* ---- Gallery -------------------------------------------------------- */

.gallery {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 860px) { .gallery { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .gallery { grid-template-columns: 1fr; } }
.gallery li:first-child { grid-column: span 2; grid-row: span 2; }
@media (max-width: 480px) { .gallery li:first-child { grid-column: auto; grid-row: auto; } }
.gallery button {
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: var(--asphalt-deep);
  border-radius: var(--radius-small);
  overflow: hidden;
  cursor: zoom-in;
}
.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}
dialog.lightbox {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(96vw, 1600px);
  max-height: 96vh;
  width: auto;
  color: var(--chalk);
}
dialog.lightbox::backdrop { background: rgba(10, 13, 20, 0.92); }
dialog.lightbox figure { margin: 0; display: grid; gap: 10px; justify-items: center; }
dialog.lightbox img {
  max-height: 84vh;
  width: auto;
  max-width: 96vw;
  border-radius: var(--radius-small);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}
dialog.lightbox figcaption { color: var(--dim); font-size: var(--t-small); text-align: center; }
dialog.lightbox .controls { display: flex; gap: 8px; justify-content: center; }
dialog.lightbox .controls button {
  font: inherit;
  font-weight: 800;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--chalk);
  border-radius: var(--radius-small);
  padding: 8px 16px;
  cursor: pointer;
}
dialog.lightbox .controls button:hover { background: var(--panel-hover); }

/* ---- Launcher ------------------------------------------------------- */

.launcher-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
@media (max-width: 900px) { .launcher-grid { grid-template-columns: 1fr; } }
.shots-stack { display: grid; gap: 12px; }
.shots-stack img, .launcher-grid .big img {
  border-radius: var(--radius-small);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}
.shots-stack .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.shots-stack button, .launcher-grid .big button {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
  text-align: left;
}
.launcher-list { margin: 0; }
.launcher-list .row { display: grid; grid-template-columns: 112px 1fr; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); }
.launcher-list .row:first-child { border-top: 0; padding-top: 0; }
.launcher-list dt { font-weight: 800; }
.launcher-list dd { margin: 0; color: var(--dim); }
.launcher-grid aside p { margin-top: 18px; color: var(--dim); font-size: var(--t-small); }

/* ---- Get started ---------------------------------------------------- */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
.steps li {
  counter-increment: step;
  padding-top: 14px;
  border-top: 3px solid var(--line);
}
.steps li::before {
  content: "Step " counter(step);
  display: block;
  color: var(--marquee);
  font-weight: 800;
  font-size: var(--t-small);
}
.steps h3 { margin-top: 6px; font-size: var(--t-lead); }
.steps p { margin-top: 8px; color: var(--dim); font-size: var(--t-small); line-height: 1.55; }
.steps code, .req code, .faq code, .download code {
  font-family: ui-monospace, Consolas, "SF Mono", monospace;
  font-size: 0.92em;
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--chalk);
}

.req { margin-top: 48px; overflow-x: auto; }
.req table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: var(--t-small); }
.req th, .req td { text-align: left; vertical-align: top; padding: 12px 14px 12px 0; border-top: 1px solid var(--line); }
.req thead th { border-top: 0; padding-top: 0; font-size: var(--t-body); }
.req tbody th { font-weight: 800; color: var(--chalk); width: 150px; }
.req td { color: var(--dim); }
.req caption { text-align: left; font-weight: 800; font-size: var(--t-title); caption-side: top; padding-bottom: 14px; }

/* ---- Download: the launcher's play bar, on the web ------------------ */

.download {
  background: var(--asphalt-deep);
  position: relative;
}
.download::before {
  /* The launcher's checkered strip above its play bar. */
  content: "";
  display: block;
  height: 12px;
  background: repeating-conic-gradient(var(--chalk) 0 25%, transparent 0 50%) 0 0 / 12px 12px;
  opacity: 0.9;
}
.download .wrap { padding-block: clamp(48px, 7vw, 88px); }
.download-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 18px; }
.download-head .version { color: var(--dim); font-size: var(--t-lead); }
.download p.sub { margin-top: 12px; color: var(--dim); max-width: var(--measure); }
.download-options {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 860px) { .download-options { grid-template-columns: 1fr; } }
.download-option {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  gap: 12px;
  align-content: start;
}
.download-option.detected { border-color: var(--marquee); }
.download-option h3 { font-size: var(--t-lead); display: flex; align-items: center; gap: 10px; }
.download-option .tag {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--ink-on-marquee);
  background: var(--marquee);
  padding: 2px 8px;
  border-radius: 999px;
}
.download-option .meta { color: var(--dim); font-size: var(--t-small); }
.download-option .file { color: var(--dim); font-size: 0.8rem; word-break: break-all; }
.download-option .file .size:not(:empty)::before { content: ", "; }
.download-option .button { justify-self: start; }
.download-more { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: var(--t-small); }
.download-note { margin-top: 26px; color: var(--dim); font-size: var(--t-small); max-width: var(--measure); }
.download-note a { color: var(--blue-soft); }

/* ---- FAQ ------------------------------------------------------------ */

.faq { max-width: 76ch; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 40px 18px 0;
  font-weight: 800;
  font-size: var(--t-lead);
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  translate: 0 -50%;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-weight: 400;
  color: var(--dim);
  transition: rotate 160ms ease;
}
.faq details[open] summary::after { rotate: 45deg; }
.faq .answer { padding: 0 0 22px; color: var(--dim); }
.faq .answer p + p { margin-top: 0.8em; }
.faq .answer a { color: var(--blue-soft); }

/* ---- Footer --------------------------------------------------------- */

.foot {
  border-top: 1px solid var(--line);
  padding-block: 48px 56px;
  color: var(--dim);
  font-size: var(--t-small);
}
.foot .cols {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
}
@media (max-width: 760px) { .foot .cols { grid-template-columns: 1fr; } }
.foot .wordmark { font-size: 1.4rem; }
.foot p { margin-top: 14px; max-width: 70ch; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.foot a { color: var(--blue-soft); }
.foot .legal { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--faint); }
.foot .legal a { color: var(--dim); }