/* bc website. Brand: Ink #0C0C0C, Paper #F4F3EF, Line #D9D7D1,
   Graphite #5F5D58, Signal #01FF95 (the dot and one call to action).
   Geist / Geist Mono are self-hosted (SIL OFL, assets/fonts/OFL.txt). */

@font-face { font-family: "Geist"; src: url("assets/fonts/Geist-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Geist"; src: url("assets/fonts/Geist-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("assets/fonts/GeistMono-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --ink: #0C0C0C;
  --paper: #F4F3EF;
  --line: #D9D7D1;
  --graphite: #5F5D58;
  --signal: #01FF95;
  --signal-deep: #00A35F;
  --body: #44433F;
  --ink-raised: #1A1A1A;
  --ink-line: #333331;
  --on-ink-dim: #A3A19B;
  --sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, monospace;
  --wrap: 1200px;
  --gutter: 24px;

  /* Theme: page colors that flip in dark mode. The dark bands (Bandcamp,
     install) and the lightbox stay dark in both themes. */
  color-scheme: light;
  --bg: var(--paper);
  --fg: var(--ink);
  --focus: var(--signal-deep);
  --rule: var(--line);
  --muted: var(--graphite);
  --text: var(--body);
  --fg-hover: #2a2a28;
  --kbd-bg: #fff;
  --band: var(--ink);
  --band-raised: var(--ink-raised);
  --band-edge: transparent;
  --shot-edge: #000;
  --shot-shadow: 0 1px 0 rgba(0,0,0,.04), 0 30px 60px -30px rgba(17,17,17,.45);
  --shot-shadow-hover: 0 1px 0 rgba(0,0,0,.04), 0 40px 70px -30px rgba(17,17,17,.55);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: var(--ink);
    --fg: var(--paper);
    --focus: var(--signal);
    --rule: #2B2B29;
    --muted: #8E8C86;
    --text: #B9B7B1;
    --fg-hover: #DCDAD4;
    --kbd-bg: var(--ink-raised);
    --band: #191918;
    --band-raised: #232322;
    --band-edge: #262624;
    --shot-edge: var(--ink-line);
    --shot-shadow: 0 30px 60px -30px rgba(0,0,0,.8);
    --shot-shadow-hover: 0 40px 70px -30px rgba(0,0,0,.9);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: var(--ink);
  --fg: var(--paper);
  --focus: var(--signal);
  --rule: #2B2B29;
  --muted: #8E8C86;
  --text: #B9B7B1;
  --fg-hover: #DCDAD4;
  --kbd-bg: var(--ink-raised);
  --band: #191918;
  --band-raised: #232322;
  --band-edge: #262624;
  --shot-edge: var(--ink-line);
  --shot-shadow: 0 30px 60px -30px rgba(0,0,0,.8);
  --shot-shadow-hover: 0 40px 70px -30px rgba(0,0,0,.9);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
a:hover { color: var(--muted); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
code { font-family: var(--mono); font-size: 0.92em; }
h1, h2, h3 { font-weight: 500; margin: 0; }
p { margin: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: var(--fg); color: var(--bg); padding: 10px 14px; z-index: 10; }

/* --- Header ---------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 16px; padding-bottom: 16px; }
.lockup { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); }
.lockup:hover { color: var(--fg); }
.mark { width: 28px; height: 28px; flex: none; }
.wordmark { font-size: 22px; font-weight: 500; line-height: 1; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav-links a { text-decoration: none; }
.theme-toggle {
  display: grid; place-items: center; width: 40px; height: 40px; padding: 0; margin: 0 -8px;
  border: 0; border-radius: 999px; background: transparent; color: var(--fg); cursor: pointer;
}
.theme-toggle:hover { color: var(--muted); }
.theme-toggle svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .moon { display: none; }
.is-dark .theme-toggle .sun { display: none; }
.is-dark .theme-toggle .moon { display: block; }

/* --- Buttons --------------------------------------------------------- */
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.pill {
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none; border-radius: 999px; font-size: 17px; line-height: 1;
  padding: 16px 26px; border: 1px solid transparent;
  transition: transform .15s ease, background-color .15s ease, color .15s ease;
}
.pill:active { transform: translateY(1px); }
.nav .pill { font-size: 15px; padding: 12px 18px; }
.pill-ink { background: var(--fg); color: var(--bg); }
.pill-ink:hover { background: var(--fg-hover); color: var(--bg); }
.pill-signal { background: var(--signal); color: var(--ink); font-weight: 500; }
.pill-signal:hover { background: #4DFFB4; color: var(--ink); }
.pill-outline { border-color: var(--fg); color: var(--fg); }
.pill-outline:hover { background: var(--fg); color: var(--bg); }
.pill-outline-light { border-color: var(--paper); color: var(--paper); }
.pill-outline-light:hover { background: var(--paper); color: var(--ink); }

/* --- Hero ------------------------------------------------------------ */
.label { font-family: var(--mono); font-size: 14px; color: var(--muted); }
/* Heading left, copy and actions right on its baseline: the hero stays short enough that the
   app screenshot starts above the fold. Stacks below 1000px. */
.hero { padding-top: 72px; padding-bottom: 48px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); column-gap: 64px; row-gap: 24px; align-items: end; }
.hero .label { grid-column: 1 / -1; }
.hero h1 { font-size: clamp(52px, 8vw, 112px); letter-spacing: -0.05em; line-height: 0.95; }
.hero-copy { display: flex; flex-direction: column; gap: 28px; }
.pill-dl { gap: 10px; }
.pill-dl svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.dl-meta { margin: -16px 0 0; font-family: var(--mono); font-size: 13px; color: var(--muted); }
.dl-meta a { color: inherit; }
.dl-meta a:hover { color: var(--fg); }
.lead { max-width: 560px; font-size: 20px; line-height: 1.5; color: var(--text); }
.lead.narrow { max-width: 640px; }

/* --- Screenshots ----------------------------------------------------- */
.shot { margin-top: 0; margin-bottom: 0; }
.shot:not(.wrap) { margin-left: 0; margin-right: 0; }
.shot img, .shot picture { border-radius: 14px; }
.shot img { background: var(--ink); box-shadow: var(--shot-shadow); border: 1px solid var(--shot-edge); }
.shot-hero { padding-bottom: 8px; }

/* --- Specs ---------------------------------------------------------- */
.specs { margin-top: 64px; }
.specs dl { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0; border-top: 1px solid var(--fg); }
.specs dl > div { padding: 20px 24px 0 0; display: flex; flex-direction: column; gap: 6px; }
.specs dt { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.specs dd { margin: 0; font-size: 18px; }

/* --- Sections -------------------------------------------------------- */
.section { padding-top: 120px; padding-bottom: 120px; display: flex; flex-direction: column; gap: 40px; }
.section h2 { font-size: clamp(36px, 5vw, 56px); letter-spacing: -0.04em; line-height: 1.05; max-width: 760px; }
.grid { display: grid; gap: 0; }
.features { grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--fg); }
.features article { padding: 28px 24px 32px 0; display: flex; flex-direction: column; gap: 12px; border-bottom: 1px solid var(--rule); }
.features h3 { font-size: 22px; letter-spacing: -0.01em; }
.features p { font-size: 16px; color: var(--text); }
.idx { font-family: var(--mono); font-size: 13px; color: var(--muted); }

.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; align-items: center; }
.split-reverse { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.split .copy { display: flex; flex-direction: column; gap: 20px; }
.split .copy p { font-size: 18px; line-height: 1.55; color: var(--text); }
.kbd { font-family: var(--mono); font-size: 0.85em; border: 1px solid var(--rule); border-radius: 6px; padding: 2px 7px; background: var(--kbd-bg); }

/* Dark band */
/* The dark bands stay dark in both themes, so they keep the bright focus ring. */
.dark, .install { --focus: var(--signal); }
.dark { background: var(--band); color: var(--paper); border-block: 1px solid var(--band-edge); }
.dark .copy p { color: var(--on-ink-dim); }
.dark .shot img { border-color: var(--ink-line); box-shadow: none; }
.tags { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { font-family: var(--mono); font-size: 13px; border: 1px solid var(--ink-line); color: var(--on-ink-dim); border-radius: 999px; padding: 6px 12px; }

/* Controllers */
.hardware { list-style: none; margin: 0; padding: 0; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--fg); column-gap: 48px; }
.hardware li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--rule); }
.hw { font-size: 18px; }
.proto { font-family: var(--mono); font-size: 13px; color: var(--muted); white-space: nowrap; }
.note { font-size: 13px; color: var(--muted); }

/* Install */
.install { background: var(--band); color: var(--paper); border-top: 1px solid var(--band-edge); }
.install .section { gap: 32px; }
.install .lead { color: var(--on-ink-dim); }
.install h2 { font-size: clamp(40px, 6vw, 72px); letter-spacing: -0.045em; line-height: 1; }
.mark-lg { width: 64px; height: 64px; }
.code { position: relative; max-width: 720px; background: var(--band-raised); border: 1px solid var(--ink-line); border-radius: 10px; }
.code pre { margin: 0; padding: 20px 96px 20px 24px; overflow-x: auto; font-family: var(--mono); font-size: 15px; line-height: 1.8; }
.code code { font-size: inherit; }
.prompt { color: var(--signal); user-select: none; }
.copy-btn {
  position: absolute; top: 14px; right: 14px;
  font: 13px var(--mono); color: var(--paper); background: transparent;
  border: 1px solid var(--ink-line); border-radius: 999px; padding: 6px 12px; cursor: pointer;
}
.copy-btn:hover { border-color: var(--paper); }
.platforms { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 48px; }
.platform { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; min-width: 0; border-top: 1px solid var(--ink-line); padding-top: 28px; }
.platform h3 { font-size: 24px; letter-spacing: -0.02em; }
.platform p { margin: 0; font-size: 16px; color: var(--on-ink-dim); line-height: 1.55; }
.platform .note { font-size: 13px; }
.platform b { color: var(--paper); font-weight: 500; }
.platform code { color: var(--paper); }
.platform .code { width: 100%; }
.install-more { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; border-top: 1px solid var(--ink-line); padding-top: 28px; }
.install-more h3 { font-size: 18px; margin-bottom: 8px; }
.install-more p { font-size: 15px; color: var(--on-ink-dim); line-height: 1.55; }
.install-more code { color: var(--paper); }

/* Footer */
.footer { padding-top: 40px; padding-bottom: 40px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-family: var(--mono); font-size: 13px; color: var(--muted); }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--fg); }
.terminal { flex: 1 0 100%; min-width: 0; }
.terminal summary { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; list-style: none; }
.terminal summary::-webkit-details-marker { display: none; }
.terminal summary::before { content: "›"; display: inline-block; transition: transform .15s ease; }
.terminal[open] summary::before { transform: rotate(90deg); }
.terminal summary:hover, .terminal[open] summary { color: var(--fg); }
.terminal p { margin: 16px 0; max-width: 720px; font-family: var(--sans); font-size: 14px; line-height: 1.55; color: var(--text); }
.terminal p code { font-family: var(--mono); font-size: 13px; color: var(--fg); }
.terminal .code { color: var(--paper); }
.terminal .code pre { font-size: 14px; }

/* --- Screenshot lightbox --------------------------------------------- */
.shot-open {
  position: relative; display: block; width: 100%; padding: 0; border: 0; margin: 0;
  background: none; color: inherit; font: inherit; text-align: left; cursor: zoom-in;
  border-radius: 14px;
}
.shot-open img { transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s ease; }
.shot-open:hover img { transform: translateY(-3px); box-shadow: var(--shot-shadow-hover); }
.shot-badge {
  position: absolute; right: 16px; bottom: 16px; display: inline-flex; align-items: center; gap: 8px;
  font: 13px var(--mono); color: var(--paper); background: rgba(17,17,17,.82);
  border: 1px solid rgba(244,243,239,.18); border-radius: 999px; padding: 8px 14px;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  opacity: 0; transform: translateY(6px); transition: opacity .25s ease, transform .25s ease; pointer-events: none;
}
.shot-badge svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.shot-open:hover .shot-badge, .shot-open:focus-visible .shot-badge { opacity: 1; transform: none; }
@media (hover: none) { .shot-badge { opacity: 1; transform: none; } }

.lb-lock, .lb-lock body { overflow: hidden; }
.lightbox { position: fixed; inset: 0; z-index: 50; color: var(--paper); }
.lb-backdrop {
  position: absolute; inset: 0; background: rgba(10,10,9,.94);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  opacity: 0; transition: opacity .4s ease;
}
.lb-frame {
  position: absolute; overflow: hidden; border-radius: 10px; transform-origin: 0 0;
  background: var(--ink); box-shadow: 0 40px 120px -20px rgba(0,0,0,.8); cursor: zoom-in;
  will-change: transform; transition: opacity .16s ease;
}
.lb-frame.is-switching { opacity: 0; }
.lb-img { display: block; width: 100%; height: 100%; max-width: none; user-select: none; transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.is-zoomed .lb-frame { cursor: zoom-out; touch-action: none; }
.is-zoomed .lb-img { transition: transform .35s cubic-bezier(.2,.8,.2,1), transform-origin .12s linear; }
.lb-caption, .lb-bar, .lb-btn { opacity: 0; transition: opacity .3s ease .15s; }
.lightbox.is-open .lb-backdrop, .lightbox.is-open .lb-caption, .lightbox.is-open .lb-bar, .lightbox.is-open .lb-btn { opacity: 1; }
.lb-caption {
  position: absolute; left: 50%; bottom: calc(44px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%);
  width: min(720px, calc(100% - 32px)); margin: 0; text-align: center; font-size: 15px; color: var(--on-ink-dim);
}
.lb-bar {
  position: absolute; left: 0; right: 0; bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  display: flex; justify-content: center; gap: 20px; font: 12px var(--mono); color: #77756F;
}
.lb-btn {
  position: absolute; display: grid; place-items: center; width: 48px; height: 48px; padding: 0;
  border-radius: 999px; border: 1px solid rgba(244,243,239,.18); background: rgba(29,29,28,.8);
  color: var(--paper); cursor: pointer; transition: opacity .3s ease .15s, background-color .15s ease, border-color .15s ease;
}
.lb-btn:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.lb-btn svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.lb-close { top: calc(14px + env(safe-area-inset-top, 0px)); right: 16px; }
.lb-prev, .lb-next { top: 50%; margin-top: -24px; }
.lb-prev { left: 20px; }
.lb-next { right: 20px; }
.lb-single .lb-prev, .lb-single .lb-next, .lb-single .lb-count { display: none; }
@media (max-width: 720px) {
  .lb-prev, .lb-next { top: auto; bottom: calc(10px + env(safe-area-inset-bottom, 0px)); margin-top: 0; width: 40px; height: 40px; }
  .lb-prev { left: 12px; } .lb-next { right: 12px; }
  .lb-hint { display: none; }
  .lb-caption { bottom: calc(60px + env(safe-area-inset-bottom, 0px)); font-size: 13px; }
  .lb-bar { bottom: calc(22px + env(safe-area-inset-bottom, 0px)); }
}

/* --- Responsive ------------------------------------------------------ */
@media (max-width: 1000px) {
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .specs dl { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 8px; }
  .split, .split-reverse, .platforms { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .hero { grid-template-columns: minmax(0, 1fr); row-gap: 28px; }
  .split-reverse .shot { order: 2; }
}
@media (max-width: 720px) {
  :root { --gutter: 16px; }
  .nav-links a:not(.pill) { display: none; }
  .hero { padding-top: 64px; }
  .lead { font-size: 18px; }
  .section { padding-top: 80px; padding-bottom: 80px; }
  .features, .hardware, .install-more { grid-template-columns: minmax(0, 1fr); }
  .shot img, .shot picture { border-radius: 8px; }
  .hardware li { flex-direction: column; gap: 4px; }
  .code pre { padding-right: 24px; padding-top: 52px; font-size: 13px; }
}
@media (max-width: 420px) {
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pill, .shot-open img, .lb-img { transition: none; }
  .shot-open:hover img { transform: none; }
}