/* BananaSplit site: tokens first (idea from the RTM teardown, own values). */

@font-face {
  font-family: "Archivo";
  src: url("../fonts/Archivo.ttf") format("truetype");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono.ttf") format("truetype");
  font-weight: 100 800;
  font-display: swap;
}

:root {
  /* surfaces: cool slate, taken from the app, not RTM's warm black */
  --void: #0a0d10;
  --raise: #11161b;
  --raise-2: #161c22;
  --well: #05070a;
  --glass: rgba(10, 13, 16, 0.7);

  /* ink: cool white */
  --ink: #e6edf2;
  --ink-2: #b4c0ca;
  --ink-dim: #7c8a96;
  --line: rgba(230, 237, 242, 0.08);
  --line-2: rgba(230, 237, 242, 0.18);
  --wash: rgba(230, 237, 242, 0.04);

  /* signal colours: the app's own */
  --live: #3fe0b4;      /* mint = signal is flowing */
  --bus-a: #5aa2f5;     /* hardware outs A1-A3 */
  --bus-b: #c27bf0;     /* virtual mics B1-B2 */
  --banana: #f4d35e;    /* brand accent, used sparingly */
  --acc: var(--live);

  /* type */
  --face: "Archivo", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --t-display: clamp(2.6rem, 1.6rem + 4.2vw, 5.4rem);
  --t-1: clamp(1.9rem, 1.4rem + 2vw, 3.1rem);
  --t-2: clamp(1.35rem, 1.15rem + 0.8vw, 1.8rem);
  --t-body: clamp(1rem, 0.96rem + 0.2vw, 1.12rem);
  --t-label: 0.7rem;

  /* motion: one curve, three timings */
  --ease: cubic-bezier(0.2, 0.9, 0.25, 1);
  --tap: 0.28s;
  --beat: 0.7s;
  --step: 70ms;

  /* depth */
  --edge: inset 0 1px 0 rgba(230, 237, 242, 0.06);
  --e1: var(--edge), 0 40px 80px -40px rgba(0, 0, 0, 0.8);
  --vignette: inset 0 0 40px 8px rgba(0, 0, 0, 0.6), inset 0 0 120px 24px rgba(2, 6, 10, 0.4);
  --focus: 0 0 0 2px var(--void), 0 0 0 3.5px var(--live);
  --radius: 14px;
  --u: 8px;
  --bar-h: calc(env(safe-area-inset-top) + 64px);
  --max: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--void); color-scheme: dark; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--face);
  font-stretch: 100%;
  font-weight: 380;
  font-size: var(--t-body);
  line-height: 1.6;
  letter-spacing: 0.012em;
  color: var(--ink-2);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(63, 224, 180, 0.06), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(90, 162, 245, 0.04), transparent 60%),
    var(--void);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
h1, h2, h3 {
  font-family: var(--face);
  font-stretch: 112%;
  font-weight: 620;
  color: var(--ink);
  letter-spacing: -0.025em;
  line-height: 0.98;
  margin: 0;
}
p { margin: 0 0 1em; }
a { color: inherit; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 6px; }
img { max-width: 100%; display: block; }

.label {
  font-family: var(--mono);
  font-size: var(--t-label);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}
.wrap { width: min(var(--max), 100% - 2 * clamp(20px, 4vw, 56px)); margin-inline: auto; }

/* film grain: one static SVG noise, slowly drifted (cheap, no canvas) */
.grain {
  position: fixed; inset: -50%; z-index: 100; pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
  0% { transform: translate(0, 0); } 20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); } 60% { transform: translate(-2%, -1%); }
  80% { transform: translate(3%, 3%); } 100% { transform: translate(0, 0); }
}

/* ---------- bar ---------- */
.bar {
  position: fixed; inset: 0 0 auto; z-index: 50;
  height: var(--bar-h);
  padding-top: env(safe-area-inset-top);
  background: var(--glass);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
.bar .wrap { height: 100%; display: flex; align-items: center; gap: 32px; }
.wordmark {
  text-decoration: none; color: var(--ink);
  font-stretch: 115%; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 10px;
}
.wordmark .dot { color: var(--live); }
.logo-slot {
  width: 26px; height: 26px; border-radius: 7px;
  border: 1px dashed var(--line-2);
  display: grid; place-items: center;
}
.logo-slot::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--live); box-shadow: 0 0 10px var(--live); }
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a {
  text-decoration: none; font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-dim);
  transition: color var(--tap) var(--ease);
}
.nav a:hover { color: var(--ink); }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-2); padding: 7px 12px; border-radius: 999px;
  background: var(--wash); border: 1px solid var(--line);
}
.led { width: 7px; height: 7px; border-radius: 50%; background: var(--live); box-shadow: 0 0 8px var(--live); animation: led 2.4s var(--ease) infinite; }
@keyframes led { 50% { opacity: 0.45; } }

/* ---------- buttons ---------- */
.btn {
  --b: var(--line-2);
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 10px;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; color: var(--ink);
  background: var(--raise); border: 1px solid var(--b);
  box-shadow: var(--edge);
  transition: transform var(--tap) var(--ease), border-color var(--tap) var(--ease), background var(--tap) var(--ease);
}
.btn:hover { transform: translateY(-2px); --b: rgba(230, 237, 242, 0.32); }
.btn.primary { color: #04120d; background: var(--live); --b: var(--live); font-weight: 600; }
.btn.primary:hover { background: #63ecc6; }

/* ---------- hero ---------- */
.hero { padding: calc(var(--bar-h) + clamp(56px, 10vh, 120px)) 0 0; }
.hero .label { color: var(--live); }
.hero h1 { font-size: var(--t-display); max-width: 13ch; margin: 18px 0 26px; }
.hero h1 em { font-style: normal; color: var(--banana); }
.hero .lede { max-width: 54ch; font-size: clamp(1.05rem, 1rem + 0.35vw, 1.3rem); color: var(--ink-2); }
.hero .ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero .meta { color: var(--ink-dim); display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 30px; }
.hero .meta span b { color: var(--ink); font-weight: 500; }

/* meter bridge: the app's 6 inputs + 5 buses as a living signature */
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 60px; }
.hero .wrap > * { grid-column: 1; }
.hero .wrap > .bridge { grid-column: 2; grid-row: 1 / span 6; align-self: center; }
.bridge {
  display: flex; gap: 10px; align-items: flex-end; height: 380px; padding: 26px 24px 40px;
  border-radius: var(--radius); background: var(--well); box-shadow: var(--vignette), 0 0 0 1px var(--line);
  position: relative;
}
.bridge > span { position: relative; width: 14px; height: 100%; border-radius: 3px; background:
  repeating-linear-gradient(0deg, transparent 0 4px, var(--void) 4px 6px), rgba(230, 237, 242, 0.05); overflow: hidden; }
.bridge > span::after {
  content: ""; position: absolute; inset: auto 0 0; height: 100%;
  background: repeating-linear-gradient(0deg, transparent 0 4px, var(--void) 4px 6px), linear-gradient(0deg, var(--c, var(--live)) 0 70%, var(--banana) 86%, #ff6b5e 100%);
  background-size: 100% 100%, 100% 380px; background-position: 0 0, 0 100%;
  transform-origin: bottom; transform: scaleY(var(--l, 0.4));
  animation: meter var(--d, 1.3s) ease-in-out infinite alternate; animation-delay: var(--o, 0s);
}
.bridge > span.gap { width: 6px; background: none; }
.bridge > span.gap::after { display: none; }
.bridge > span.a { --c: var(--bus-a); } .bridge > span.b { --c: var(--bus-b); }
.bridge .caption { position: absolute; left: 24px; right: 24px; bottom: 12px; display: flex; justify-content: space-between; }
@keyframes meter { 0% { transform: scaleY(calc(var(--l, 0.4) * 0.45)); } 35% { transform: scaleY(calc(var(--l, 0.4) * 1.05)); } 60% { transform: scaleY(calc(var(--l, 0.4) * 0.7)); } 100% { transform: scaleY(var(--l, 0.4)); } }

/* ---------- the scrubbed stage ---------- */
.stage { position: relative; height: 340vh; margin-top: clamp(40px, 8vh, 90px); }
.stage-sticky {
  position: sticky; top: 0; height: 100svh; overflow: hidden;
  display: grid; place-items: center; perspective: 1600px;
}
.rack {
  --tilt: 0; --zoom: 1;
  position: relative;
  width: min(1240px, 94vw);
  aspect-ratio: 1797 / 1043;
  border-radius: 16px;
  background: var(--well);
  box-shadow: var(--vignette), 0 0 0 1px var(--line), 0 60px 120px -40px rgba(0, 0, 0, 0.9);
  transform: rotateX(calc(var(--tilt) * 1deg)) scale(var(--zoom));
  transform-origin: 50% 0%;
  will-change: transform;
}
.rack img { width: 100%; height: 100%; border-radius: 16px; object-fit: cover; }
.rack .placeholder-tag {
  position: absolute; right: 14px; bottom: -30px;
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-dim);
}
/* spotlight: a box with a huge shadow dims everything around the current chapter */
.spot {
  position: absolute; border-radius: 12px; pointer-events: none;
  left: var(--x, 0%); top: var(--y, 0%); width: var(--w, 100%); height: var(--h, 100%);
  box-shadow: 0 0 0 200vmax rgba(5, 7, 10, var(--dim, 0)), 0 0 0 1px rgba(63, 224, 180, var(--ring, 0)), 0 0 40px rgba(63, 224, 180, calc(var(--ring, 0) * 0.25));
  transition: left var(--beat) var(--ease), top var(--beat) var(--ease), width var(--beat) var(--ease), height var(--beat) var(--ease);
}
.rack-clip { position: absolute; inset: 0; overflow: hidden; border-radius: 16px; }
.chapters {
  position: absolute; left: 50%; bottom: clamp(18px, 5vh, 48px); transform: translateX(-50%);
  width: min(760px, 92vw);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.chapter {
  padding: 14px 16px; border-radius: 12px;
  background: rgba(10, 13, 16, 0.88); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  opacity: 0.5; transform: translateY(6px);
  transition: opacity var(--tap) var(--ease), transform var(--tap) var(--ease), border-color var(--tap) var(--ease);
}
.chapter.on { opacity: 1; transform: none; border-color: rgba(63, 224, 180, 0.4); }
.chapter .label { color: var(--live); }
.chapter h3 { font-size: 1.05rem; margin: 6px 0 4px; }
.chapter p { font-size: 0.86rem; line-height: 1.45; margin: 0; color: var(--ink-2); }
.stage-progress { position: absolute; top: calc(var(--bar-h) + 18px); left: 50%; transform: translateX(-50%); display: flex; gap: 6px; }
.stage-progress i { width: 28px; height: 3px; border-radius: 2px; background: var(--line-2); overflow: hidden; }
.stage-progress i::after { content: ""; display: block; height: 100%; width: calc(var(--p, 0) * 100%); background: var(--live); }

/* ---------- sections ---------- */
section.block { padding: clamp(90px, 14vh, 160px) 0; }
.head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: end; margin-bottom: 56px; }
.head h2 { font-size: var(--t-1); margin-top: 14px; }
.head p { max-width: 48ch; margin: 0; }

/* reveal: only headings, never body text or buttons */
.rv { opacity: 0; transform: translateY(16px); transition: opacity var(--beat) var(--ease), transform var(--beat) var(--ease); }
.rv.in { opacity: 1; transform: none; }
.no-js .rv { opacity: 1; transform: none; }

/* ---------- routing lab ---------- */
.lab {
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 18px; align-items: start;
}
.panel {
  position: relative; border-radius: var(--radius);
  background: linear-gradient(180deg, var(--raise-2), var(--raise));
  border: 1px solid var(--line); box-shadow: var(--e1);
  padding: clamp(18px, 2.4vw, 28px);
}
.matrix { width: 100%; border-collapse: separate; border-spacing: 6px; }
.matrix th { font-family: var(--mono); font-weight: 400; font-size: 0.68rem; letter-spacing: 0.12em; color: var(--ink-dim); text-align: center; }
.matrix th.row { text-align: left; color: var(--ink); width: 34%; }
.matrix .meter {
  display: block; height: 4px; margin-top: 8px; border-radius: 2px; background: var(--well); box-shadow: var(--vignette); overflow: hidden;
}
.matrix .meter i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--live), #a8f5df); transition: width 90ms linear; }
.route {
  width: 100%; aspect-ratio: 1.6; min-height: 34px; border-radius: 8px; cursor: pointer;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em;
  color: var(--ink-dim); background: var(--well); border: 1px solid var(--line);
  box-shadow: var(--edge);
  transition: background var(--tap) var(--ease), color var(--tap) var(--ease), border-color var(--tap) var(--ease), transform var(--tap) var(--ease);
}
.route:hover { border-color: var(--line-2); color: var(--ink); }
.route:active { transform: scale(0.96); }
.route[aria-pressed="true"][data-bus^="A"] { background: rgba(90, 162, 245, 0.18); border-color: var(--bus-a); color: #cfe3ff; }
.route[aria-pressed="true"][data-bus^="B"] { background: rgba(194, 123, 240, 0.18); border-color: var(--bus-b); color: #efd9ff; }
.buses { display: grid; gap: 12px; }
.bus {
  display: grid; grid-template-columns: 46px 1fr; gap: 4px 14px; align-items: center;
  padding: 12px 14px; border-radius: 10px; background: var(--well); box-shadow: var(--vignette);
  border: 1px solid var(--line);
}
.bus b { grid-row: span 2; font-family: var(--mono); font-weight: 500; font-size: 0.95rem; }
.bus[data-bus^="A"] b { color: var(--bus-a); }
.bus[data-bus^="B"] b { color: var(--bus-b); }
.bus .who { font-size: 0.86rem; color: var(--ink); min-height: 1.4em; }
.bus .who.empty { color: var(--ink-dim); }
.bus .what { font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); }
.lab-note { margin-top: 16px; font-size: 0.85rem; color: var(--ink-dim); }

/* ---------- feature cards with cursor light ---------- */
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { min-height: 220px; display: flex; flex-direction: column; gap: 10px; overflow: hidden;
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform var(--tap) var(--ease), border-color var(--tap) var(--ease);
}
.card:hover { border-color: var(--line-2); }
.card h3 { font-size: var(--t-2); font-stretch: 108%; margin-top: auto; }
.card p { margin: 0; font-size: 0.95rem; }
.card .label { color: var(--acc); }
.material-light::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: radial-gradient(380px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--acc) 16%, transparent), color-mix(in srgb, var(--acc) 4%, transparent) 38%, transparent 70%);
  mix-blend-mode: screen; opacity: 0; transition: opacity var(--tap) var(--ease);
}
.material-light:hover::before { opacity: 1; }
.card.wide { grid-column: span 2; }
.code {
  font-family: var(--mono); font-size: 0.78rem; color: var(--ink-2);
  background: var(--well); box-shadow: var(--vignette); border-radius: 8px; padding: 12px 14px;
  border: 1px solid var(--line); overflow-x: auto; white-space: pre;
}
.code .k { color: var(--live); }

/* ---------- download ---------- */
.platforms { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.platform h3 { font-size: var(--t-2); margin: 10px 0 14px; }
.platform ul { list-style: none; margin: 0 0 22px; padding: 0; display: grid; gap: 8px; }
.platform li { font-family: var(--mono); font-size: 0.74rem; color: var(--ink-2); padding: 9px 12px; border-radius: 8px; background: var(--well); border: 1px solid var(--line); }
.platform .backend { font-size: 0.9rem; margin-bottom: 16px; }
.platform .btn { margin-top: auto; align-self: flex-start; }
.platform { display: flex; flex-direction: column; }

/* ---------- open source band ---------- */
.band {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 40px; align-items: center;
  padding: clamp(28px, 4vw, 52px);
}
.band h2 { font-size: var(--t-1); margin: 14px 0 18px; }
.warn { border-left: 2px solid var(--banana); padding: 4px 0 4px 16px; color: var(--ink-2); font-size: 0.95rem; }
.warn b { color: var(--banana); font-weight: 500; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 40px 0 60px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 20px 40px; align-items: center; justify-content: space-between; }
footer .label a { text-decoration: none; }
footer .label a:hover { color: var(--ink); }

/* ---------- small screens ---------- */
@media (max-width: 900px) {
  .nav { display: none; }
  .bar .pill { margin-left: auto; }
  .hero .wrap { display: block; }
  .bridge { display: none; }
  .head, .lab, .band { grid-template-columns: 1fr; }
  .grid, .platforms { grid-template-columns: 1fr; }
  .card.wide { grid-column: auto; }
  .stage { height: auto; }
  .stage-sticky { position: relative; height: auto; padding: 20px 0 40px; display: block; }
  .rack { transform: none; margin: 0 auto; width: 94vw; }
  .chapters { position: static; transform: none; grid-template-columns: 1fr; margin: 50px auto 0; }
  .chapter { opacity: 1; transform: none; }
  .stage-progress, .spot { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .rv { opacity: 1; transform: none; }
  .rack { transform: none !important; }
}
@media print { .rv { opacity: 1; transform: none; } .grain, .bar { display: none; } }