/* GameKit marketing site — "engine room" aesthetic.
   Near-black charcoal, phosphor-green accent, monospace display type,
   hairline blueprint grid, sharp corners. No frameworks, no external requests. */

:root {
  --bg:          #0a0e0c;
  --bg-raised:   #0d1310;
  --bg-inset:    #080b0a;
  --line:        #1c2822;
  --line-bright: #2c4336;
  --text:        #c8d5cc;
  --muted:       #8b9a90;
  --accent:      #46e08c;
  --accent-dim:  rgba(70, 224, 140, 0.55);
  --accent-glow: rgba(70, 224, 140, 0.08);
  --code-str:    #a7e8c3;
  --code-type:   #e6f2ea;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
          Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* blueprint grid */
  background-image:
    linear-gradient(var(--accent-glow) 1px, transparent 1px),
    linear-gradient(90deg, var(--accent-glow) 1px, transparent 1px);
  background-size: 56px 56px;
  background-attachment: fixed;
  overflow-x: hidden;
}

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- links / focus ---------- */

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #06130c;
  font-family: var(--mono);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  padding: 0.05em 0.35em;
  color: var(--code-type);
  white-space: nowrap;
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 12, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 3.25rem;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 0.95rem;
  color: var(--text);
}
.wordmark:hover { text-decoration: none; color: var(--accent); }
.wordmark-block { color: var(--accent); margin-right: 0.45rem; }

.topnav {
  display: flex;
  gap: 1.4rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.topnav a { color: var(--muted); }
.topnav a:hover { color: var(--accent); text-decoration: none; }

/* ---------- hero ---------- */

.hero { padding: 5rem 0 4rem; border-bottom: 1px solid var(--line); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3.5rem;
  align-items: center;
}

.hero-term { max-width: none; align-self: center; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

h1 {
  font-family: var(--mono);
  font-size: clamp(2.15rem, 5.2vw, 3.4rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #eef5f0;
  margin-bottom: 1.4rem;
  text-wrap: balance;
}

.lede {
  max-width: 44rem;
  font-size: 1.08rem;
  color: var(--muted);
  margin-bottom: 2rem;
}
.lede em { color: var(--text); font-style: normal; border-bottom: 1px solid var(--accent-dim); }
.lede strong { color: var(--text); }

/* terminal blocks */

.term {
  display: flex;
  flex-direction: column;
  background: var(--bg-inset);
  border: 1px solid var(--line-bright);
  max-width: 40rem;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.4), 0 18px 40px -24px rgba(70,224,140,0.25);
}

.term-bar {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 0.4rem 0.9rem;
  background: var(--bg-raised);
}

.term-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.term-body { position: relative; flex: 1 1 auto; }

.term-body pre {
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--code-type);
  /* right-edge fade: signals horizontal scrollability when lines clip */
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 2.25rem), transparent);
          mask-image: linear-gradient(to right, #000 calc(100% - 2.25rem), transparent);
}

/* keep hero commands clear of the absolutely-positioned copy button as the
   hero column narrows; above 1100px the capped wrap width already clears it,
   and below 621px the button drops out of the overlay position entirely */
@media (min-width: 621px) and (max-width: 1100px) {
  .hero-term pre { padding-right: 4.75rem; }
}

.term-body code { background: none; border: 0; padding: 0; white-space: pre; font-size: 1em; }

.p { color: var(--accent); font-weight: 700; }
.c { color: var(--muted); }
.k { color: var(--accent); }
.f { color: #7ce6ac; }
.s { color: var(--code-str); }
.t { color: #eef5f0; }

.copy-btn {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--bg-raised);
  border: 1px solid var(--line-bright);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent-dim); }
.copy-btn.copied { color: #06130c; background: var(--accent); border-color: var(--accent); }

.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.btn {
  font-family: var(--mono);
  font-size: 0.88rem;
  padding: 0.7rem 1.3rem;
  border: 1px solid var(--line-bright);
  color: var(--text);
  background: transparent;
}
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-solid { background: var(--accent); border-color: var(--accent); color: #06130c; font-weight: 700; }
.btn-solid:hover { background: #63eb9f; color: #06130c; }

/* ---------- fact strip ---------- */

.strip {
  border-bottom: 1px solid var(--line);
  background: var(--bg-raised);
}
.strip-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 2.5rem;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
}
.strip-inner b { color: var(--accent); font-weight: 700; margin-right: 0.35rem; }

/* ---------- sections ---------- */

.section { padding: 4.5rem 0; border-bottom: 1px solid var(--line); }

h2 {
  font-family: var(--mono);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #eef5f0;
  margin-bottom: 1rem;
  text-wrap: balance;
}

.sec-num {
  color: var(--accent);
  margin-right: 0.75rem;
}
.sec-num::after { content: " /"; color: var(--line-bright); }

.section-sub {
  font-size: 0.98rem;
  color: var(--muted);
  margin-bottom: 2.25rem;
  max-width: 44rem;
}

/* what-it-is split */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
  margin-top: 1.5rem;
}

.prose p { margin-bottom: 1.1rem; max-width: 40rem; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: #eef5f0; }

.manifest {
  border: 1px solid var(--line-bright);
  background: var(--bg-inset);
  padding: 1.2rem 1.4rem;
  font-family: var(--mono);
  font-size: 0.86rem;
}
.manifest-head {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.7rem;
  margin-bottom: 0.8rem;
}
.manifest ul { list-style: none; }
.manifest li { padding: 0.28rem 0; color: var(--text); }
.manifest li.neg { color: var(--muted); }
.manifest .ok { color: var(--accent); font-weight: 700; margin-right: 0.6rem; }
.manifest .no { color: var(--muted); font-weight: 700; margin-right: 0.6rem; }

/* ---------- module grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;                       /* hairline gutters via background */
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--bg);
  padding: 1.4rem 1.5rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.card:hover { background: var(--bg-raised); }

.card h3 {
  font-family: var(--mono);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.01em;
}
.card h3::before { content: "$ "; color: var(--line-bright); }

.card p { font-size: 0.9rem; color: var(--muted); }
.card p code { font-size: 0.85em; }

.card-tags {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.72rem !important;
  letter-spacing: 0.06em;
  color: #46b57c !important;   /* AA on near-black at this size */
  text-transform: uppercase;
}

/* ---------- compose ---------- */

.code-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  align-items: stretch;   /* panes bottom-align; .term is a flex column */
}

.term-code { max-width: none; }

/* ---------- production ---------- */

.ops-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem 2.5rem;
  margin-top: 2.25rem;
}

.ops-item h3 {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: #eef5f0;
  margin-bottom: 0.45rem;
}
.ops-item h3::before { content: "// "; color: var(--accent); }
.ops-item p { font-size: 0.9rem; color: var(--muted); }

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

.footer { padding: 3rem 0 3.5rem; }

.badges { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-bottom: 1.6rem; }

.badge {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line-bright);
  padding: 0.35rem 0.8rem;
  background: var(--bg-inset);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-bottom: 1.6rem;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent); }

.footer-note {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
}

.cursor { color: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .hero-term { max-width: 40rem; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ops-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .code-cols { grid-template-columns: minmax(0, 1fr); }
  .split { grid-template-columns: minmax(0, 1fr); gap: 1.8rem; }
  .manifest { max-width: 26rem; }
}

@media (max-width: 620px) {
  .hero { padding: 3.5rem 0 2.75rem; }
  .section { padding: 3rem 0; }
  .grid { grid-template-columns: minmax(0, 1fr); }
  .ops-grid { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .topnav { gap: 1rem; font-size: 0.78rem; }
  .strip-inner { gap: 0.3rem 1.6rem; }
  .term-body pre { font-size: 0.8rem; }
  .copy-btn { position: static; display: block; width: 100%; border-top: 1px solid var(--line); padding: 0.55rem; }
  .hero-ctas { flex-direction: column; max-width: 26rem; }
  .btn { text-align: center; }
}

@media (max-width: 460px) {
  /* keep the topbar on one line at 360px — external links win */
  .topnav .in-page { display: none; }
  .wordmark { letter-spacing: 0.12em; }
}