/* Syft Notes' website, in the look of the app: its typeface (Atkinson Hyperlegible Next, served from this site), its
   grey canvas with white pages and hairlines round them, its ink pill buttons, and Joey's pixel s with its four colours
   (lilac, sky, coral, mustard) as the accents. Flat colours only. Light and dark follow the visitor's system. Nothing
   loads from anyone else's server. */

@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("fonts/AtkinsonHyperlegibleNext-Variable.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

/* The wordmark's face (SIL OFL 1.1, fonts/OFL-Archivo.txt). */
@font-face {
  font-family: "Archivo";
  src: url("fonts/Archivo-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Archivo";
  src: url("fonts/Archivo-BlackItalic.woff2") format("woff2");
  font-weight: 900;
  font-style: italic;
  font-display: swap;
}

:root {
  color-scheme: light dark;
  /* The pixel s's colours. They stay as they are in the dark, as they do on the dark app icon. */
  --lilac: #cdbdff;
  --sky: #a3daf2;
  --coral: #ff6e4e;
  --mustard: #ffc943;
  --black: #16131d;
  --paper: #fbfaf7;

  /* The app's light look: a grey canvas, white pages, hairlines. */
  --page: #f4f4f1;
  --surface: #ffffff;
  --mesh: #efede8;
  --line: #e4e2dc;
  --line-2: #d4d1c9;
  --ink: #16131d;
  --ink-2: #45444b;
  --ink-3: #5c5b63;
  --on-ink: #ffffff;
  --band: #16131d;
  --band-line: #2e2a39;
  --hl: var(--lilac);
  --shadow: 0 1px 2px rgb(22 19 29 / 0.06), 0 14px 34px -14px rgb(22 19 29 / 0.2);
  --lift: 0 1px 2px rgb(22 19 29 / 0.06), 0 24px 60px -24px rgb(22 19 29 / 0.3);

  --font: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;

  --wrap: 74rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --radius: 18px;
  /* A cell of the s on the 8-unit grid: 6.6 square, corners 1.8, so 27 % of its side. */
  --cell: 0.66rem;
  --cell-r: 0.18rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* The dark tile's colours: ink, its mesh and ghost cells. */
    --page: #16131d;
    --surface: #1e1b26;
    --mesh: #24212d;
    --line: #2e2a39;
    --line-2: #3b3648;
    --ink: #f6f4ef;
    --ink-2: #d2cfd8;
    --ink-3: #a6a3ae;
    --on-ink: #16131d;
    --band: #1e1b26;
    --band-line: #2e2a39;
    --hl: #685f83;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.35), 0 14px 34px -14px rgb(0 0 0 / 0.6);
    --lift: 0 1px 2px rgb(0 0 0 / 0.35), 0 24px 60px -24px rgb(0 0 0 / 0.7);
  }
}

*, *::before, *::after { box-sizing: border-box; }
/* What the script hides stays hidden, buttons too (their display would otherwise win over the attribute). */
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 400 1.0625rem/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video, svg { max-width: 100%; }
img, video { height: auto; display: block; }
a { color: var(--ink); text-decoration-color: var(--line-2); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 8px; }
::selection { background: var(--lilac); color: var(--black); }

h1, h2, h3 { font-family: var(--font); font-weight: 800; letter-spacing: -0.03em; line-height: 1.04; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 1.4rem + 5vw, 5.2rem); letter-spacing: -0.04em; line-height: 0.98; }
h2 { font-size: clamp(2rem, 1.2rem + 2.8vw, 3.2rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.02em; line-height: 1.2; font-weight: 750; }
p { margin: 0 0 1em; text-wrap: pretty; }
strong { font-weight: 700; }
/* A key, as the app draws ⌘J: a small rounded chip with a hairline. */
kbd { font: 600 0.82em/1 var(--font); padding: 0.22em 0.45em; border: 1px solid var(--line-2); border-radius: 6px; background: var(--surface); color: var(--ink-2); white-space: nowrap; }
code { font: 0.9em var(--mono); background: var(--mesh); padding: 0.1em 0.35em; border-radius: 5px; }

/* A word picked out the way the app keeps a student's own lines in written notes: a flat band of highlighter under
   it (an inset shadow, so it never reaches up over the line above). */
mark, .hl {
  color: inherit;
  background: none;
  box-shadow: inset 0 -0.42em 0 var(--hl);
  padding: 0 0.06em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}


.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.narrow { max-width: 46rem; }
.skip { position: absolute; left: -999px; top: 0.5rem; z-index: 10; background: var(--surface); color: var(--ink); padding: 0.5rem 0.9rem; border-radius: 10px; box-shadow: var(--shadow); }
.skip:focus { left: 0.75rem; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Header: the brand as the logo board's lockup (the white tile in the light, the s on ink in the dark), and the
   pages as the app's sidebar rows. */
.site-head { position: sticky; top: 0; z-index: 5; background: var(--page); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.site-head.scrolled { border-bottom-color: var(--line); }
.site-head .wrap { display: flex; align-items: center; gap: 1rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); text-decoration: none; margin-right: auto; }
.brand picture, .brand img { display: block; }
.brand img { width: 34px; height: 34px; object-fit: contain; }
.brand .tile-light { border-radius: 8px; box-shadow: 0 0 0 1px var(--line); }
@media (prefers-color-scheme: dark) { .brand .tile-light { border-radius: 0; box-shadow: none; } }
.wordmark { font: 400 1.3rem/1 "Archivo", var(--font); letter-spacing: -0.02em; text-transform: lowercase; color: var(--ink); white-space: nowrap; }
.wordmark b { font-weight: 900; font-style: italic; }
.nav { display: flex; align-items: center; gap: 0.2rem; list-style: none; margin: 0; padding: 0; }
.nav a { display: block; padding: 0.45rem 0.8rem; border-radius: 10px; color: var(--ink-2); text-decoration: none; font-size: 0.975rem; font-weight: 600; box-shadow: 0 0 0 1px transparent; }
.nav a:hover { color: var(--ink); background: var(--surface); box-shadow: 0 0 0 1px var(--line); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 750; background: var(--surface); box-shadow: 0 0 0 1px var(--line); }
.nav .gh svg { width: 20px; height: 20px; display: block; fill: currentColor; }
@media (max-width: 640px) {
  .nav .hide-sm { display: none; }
  .nav a { padding: 0.45rem 0.55rem; }
  .wordmark { font-size: 1.15rem; }
}

/* Buttons: the app's pills. Ink for the one thing to do (Stop, Get started), white with a hairline for the rest. */
.btn {
  display: inline-flex; align-items: center; gap: 0.7rem; min-height: 3rem; padding: 0.7rem 1.5rem 0.7rem 1.2rem;
  border-radius: 999px; font: 700 1.05rem/1.15 var(--font); text-decoration: none; letter-spacing: -0.01em;
  border: 1px solid transparent; transition: transform 0.12s ease, opacity 0.2s;
}
.btn svg { width: 22px; height: 22px; flex: none; fill: currentColor; }
.btn small { display: block; font-weight: 500; font-size: 0.8125rem; opacity: 0.8; margin-top: 0.18rem; letter-spacing: 0; }
.btn-primary { background: var(--ink); color: var(--on-ink); border-color: var(--ink); }
.btn-primary:hover { opacity: 0.88; }
.btn-quiet { background: var(--surface); color: var(--ink); border-color: var(--line-2); }
.btn-quiet:hover { border-color: var(--ink-3); }
.btn:active { transform: translateY(1px); }
.btns { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* The opening: what it is and the download, the pixel s, then the whole app once. */
.hero { padding: clamp(2.5rem, 6vw, 4.5rem) 0 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 24rem); gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.hero h1 { max-width: 11ch; }
.lede { font-size: clamp(1.15rem, 1rem + 0.5vw, 1.35rem); line-height: 1.5; color: var(--ink-2); max-width: 36rem; margin: 1.4rem 0 2rem; }
.fine { font-size: 0.9rem; color: var(--ink-3); margin: 1rem 0 0; }
.fine a { color: inherit; }
.other-dl a { margin-left: 0.6rem; }
.next { margin: 1rem 0 0; max-width: 34rem; font-weight: 600; color: var(--ink-2); }
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-grid > .hero-mark { order: -1; width: min(13rem, 56vw); }
}

/* The pixel s, as the app icon's tile: white with the light look in the light, ink with the dark look in the dark. */
.hero-mark { margin: 0; width: 100%; justify-self: center; }
.hero-mark .tile { aspect-ratio: 1; border-radius: 22.2%; overflow: hidden; }
.hero-mark .tile svg { display: block; width: 100%; height: 100%; }
.hero-mark .tile-light { background: #fff; box-shadow: 0 0 0 1px var(--line), var(--lift); }
.hero-mark .tile-dark { display: none; background: var(--black); box-shadow: 0 0 0 1px var(--band-line), var(--lift); }
@media (prefers-color-scheme: dark) {
  .hero-mark .tile-light { display: none; }
  .hero-mark .tile-dark { display: block; }
}
/* The light mesh only shows while the bits are sieved (the light look has no grid behind it). */
.sv-mesh { opacity: 0; }

/* The motion, from Joey's reference (syft-motion.html), each played once and held on the finished mark. In the light,
   S2 Sieve Drop: the grid appears, loose bits fall through it, the s lights up along its path, and the six loose bits
   settle above it as on the logo board's white tile; then the grid goes. In the dark, S1 Sort In: the bits rain in and
   stack from the bottom, and three fall out below as on the app icon. Only transform and opacity move. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes sv-mesh { 0% { opacity: 0 } 8%, 88% { opacity: 1 } 98%, 100% { opacity: 0 } }
  .sv-mesh { animation: sv-mesh 5s ease both; }
  @keyframes sv-pop { 0% { opacity: 0; transform: scale(.3) } 7% { opacity: 1; transform: scale(1.18) } 11% { transform: scale(1) } 100% { opacity: 1; transform: scale(1) } }
  .sv-pop { animation: sv-pop 5s cubic-bezier(.3,.7,.4,1) both; transform-box: fill-box; transform-origin: center; }
  /* Cells light up in path order: delay = 0.5s + index × 0.05s; the bits above follow on. */
  .mark-light .p0{animation-delay:.50s}.mark-light .p1{animation-delay:.55s}.mark-light .p2{animation-delay:.60s}.mark-light .p3{animation-delay:.65s}
  .mark-light .p4{animation-delay:.70s}.mark-light .p5{animation-delay:.75s}.mark-light .p6{animation-delay:.80s}.mark-light .p7{animation-delay:.85s}
  .mark-light .p8{animation-delay:.90s}.mark-light .p9{animation-delay:.95s}.mark-light .p10{animation-delay:1.00s}.mark-light .p11{animation-delay:1.05s}
  .mark-light .p12{animation-delay:1.10s}.mark-light .p13{animation-delay:1.15s}.mark-light .p14{animation-delay:1.20s}.mark-light .p15{animation-delay:1.25s}
  .mark-light .p16{animation-delay:1.30s}.mark-light .p17{animation-delay:1.35s}.mark-light .p18{animation-delay:1.40s}.mark-light .p19{animation-delay:1.45s}
  .mark-light .p20{animation-delay:1.50s}.mark-light .p21{animation-delay:1.55s}.mark-light .p22{animation-delay:1.60s}.mark-light .p23{animation-delay:1.65s}
  .mark-light .q0{animation-delay:1.70s}.mark-light .q1{animation-delay:1.75s}.mark-light .q2{animation-delay:1.80s}
  .mark-light .q3{animation-delay:1.85s}.mark-light .q4{animation-delay:1.90s}.mark-light .q5{animation-delay:1.95s}
  @keyframes sv-fall { 0% { transform: translateY(0) rotate(0deg) } 100% { transform: translateY(240px) rotate(var(--r)) } }
  .sv-fall { animation: sv-fall 3s linear both; transform-box: fill-box; transform-origin: center; }
  .mark-light .b0 { --r: 220deg;  animation-duration: 2.6s; animation-delay: 0s }
  .mark-light .b1 { --r: -180deg; animation-duration: 3.1s; animation-delay: .7s }
  .mark-light .b2 { --r: 260deg;  animation-duration: 2.8s; animation-delay: 1.4s }
  .mark-light .b3 { --r: -240deg; animation-duration: 3.3s; animation-delay: .3s }
  .mark-light .b4 { --r: 200deg;  animation-duration: 2.9s; animation-delay: 2s }
  .mark-light .b5 { --r: -200deg; animation-duration: 2.7s; animation-delay: 2.4s }

  @keyframes sf-in {
    0%   { transform: translate(var(--dx), var(--dy)) rotate(var(--r)); opacity: 0 }
    6%   { opacity: 1 }
    26%  { transform: translate(0px, 0px) rotate(0deg) }
    29%  { transform: translate(0px, -1.5px) rotate(0deg) }
    32%  { transform: translate(0px, 0px) rotate(0deg) }
    100% { transform: translate(0px, 0px) rotate(0deg); opacity: 1 }
  }
  .sf-in { animation: sf-in 5s cubic-bezier(.22,.9,.3,1) both; transform-box: fill-box; transform-origin: center; }
  /* Per-cell start offset (dx, dy), spin (r) and delay. Bottom rows land first. */
  .s1 .p0  { --dx: -10px; --dy: -92px;  --r: 70deg;   animation-delay: .64s }
  .s1 .p1  { --dx: 8px;   --dy: -86px;  --r: -60deg;  animation-delay: .76s }
  .s1 .p2  { --dx: -12px; --dy: -94px;  --r: 90deg;   animation-delay: .74s }
  .s1 .p3  { --dx: 10px;  --dy: -90px;  --r: -110deg; animation-delay: .78s }
  .s1 .p4  { --dx: -8px;  --dy: -84px;  --r: 70deg;   animation-delay: .72s }
  .s1 .p5  { --dx: 12px;  --dy: -92px;  --r: -80deg;  animation-delay: .80s }
  .s1 .p6  { --dx: 14px;  --dy: -100px; --r: -100deg; animation-delay: .62s }
  .s1 .p7  { --dx: -6px;  --dy: -88px;  --r: 50deg;   animation-delay: .66s }
  .s1 .p8  { --dx: 10px;  --dy: -96px;  --r: 110deg;  animation-delay: .52s }
  .s1 .p9  { --dx: -14px; --dy: -104px; --r: -80deg;  animation-delay: .55s }
  .s1 .p10 { --dx: 12px;  --dy: -95px;  --r: 60deg;   animation-delay: .40s }
  .s1 .p11 { --dx: -8px;  --dy: -112px; --r: -120deg; animation-delay: .44s }
  .s1 .p12 { --dx: 15px;  --dy: -100px; --r: 80deg;   animation-delay: .38s }
  .s1 .p13 { --dx: -12px; --dy: -108px; --r: -50deg;  animation-delay: .42s }
  .s1 .p14 { --dx: -14px; --dy: -100px; --r: -70deg;  animation-delay: .30s }
  .s1 .p15 { --dx: 9px;   --dy: -118px; --r: 100deg;  animation-delay: .27s }
  .s1 .p16 { --dx: -10px; --dy: -110px; --r: 70deg;   animation-delay: .16s }
  .s1 .p17 { --dx: 6px;   --dy: -120px; --r: -110deg; animation-delay: .20s }
  .s1 .p18 { --dx: 8px;   --dy: -110px; --r: 80deg;   animation-delay: 0s }
  .s1 .p19 { --dx: -12px; --dy: -120px; --r: -60deg;  animation-delay: .05s }
  .s1 .p20 { --dx: 14px;  --dy: -105px; --r: 120deg;  animation-delay: .02s }
  .s1 .p21 { --dx: -6px;  --dy: -125px; --r: -90deg;  animation-delay: .08s }
  .s1 .p22 { --dx: 10px;  --dy: -115px; --r: 45deg;   animation-delay: .04s }
  .s1 .p23 { --dx: 12px;  --dy: -105px; --r: 90deg;   animation-delay: .14s }
  /* Once the s has landed, the three bits drop out under it. */
  @keyframes fall-out { 0% { opacity: 0; transform: translateY(-6px) } 100% { opacity: 1; transform: translateY(0) } }
  .fo { animation: fall-out .5s cubic-bezier(.4,0,.2,1) both; transform-box: fill-box; transform-origin: center; }
  .sf-out .k0 { animation-delay: 2.2s } .sf-out .k1 { animation-delay: 2.32s } .sf-out .k2 { animation-delay: 2.44s }
}

/* The whole app once, its window on the canvas. */
.stage { margin: clamp(2.5rem, 6vw, 4rem) 0 0; }
.stage img { margin: 0 auto; width: 100%; filter: drop-shadow(0 1px 2px rgb(22 19 29 / 0.1)) drop-shadow(0 24px 40px rgb(22 19 29 / 0.18)); }
@media (prefers-color-scheme: dark) {
  .stage img { filter: drop-shadow(0 0 1px rgb(255 255 255 / 0.12)) drop-shadow(0 24px 40px rgb(0 0 0 / 0.5)); }
}

/* What it does: one white page with a hairline round it, as the app's own page sits on its canvas, and each thing the
   app does a row of it, split by hairlines like the notes on Home. Each row's colour is one of the s's. */
.sheet { background: var(--surface); border-radius: var(--radius); box-shadow: 0 0 0 1px var(--line); }
.feature { padding: clamp(3rem, 7vw, 5rem) clamp(1.25rem, 4vw, 3rem); border-top: 1px solid var(--line); }
.feature:first-child { border-top: 0; }
.feature-grid { display: grid; grid-template-columns: minmax(0, 4.4fr) minmax(0, 7.6fr); gap: clamp(2rem, 4vw, 3.5rem); align-items: center; }
.feature.flip .feature-grid { grid-template-columns: minmax(0, 7.6fr) minmax(0, 4.4fr); }
.feature.flip .feature-text { order: 2; }
.c-lilac { --c: var(--lilac); }
.c-sky { --c: var(--sky); }
.c-coral { --c: var(--coral); }
.c-mustard { --c: var(--mustard); }
/* The word, with the colour's cell beside it like a class's swatch in the sidebar. */
.feature h2 { display: flex; align-items: center; gap: 0.32em; font-size: clamp(2.5rem, 1.4rem + 3vw, 3.9rem); letter-spacing: -0.045em; line-height: 0.95; }
.feature h2::before { content: ""; width: 0.42em; height: 0.42em; border-radius: calc(0.42em * 0.27); background: var(--c); flex: none; }
.feature-sub { font-size: clamp(1.2rem, 1rem + 0.8vw, 1.5rem); font-weight: 700; letter-spacing: -0.015em; line-height: 1.25; margin: 1rem 0; }
.feature p { max-width: 33rem; color: var(--ink-2); }
.feature .feature-sub { color: var(--ink); }
.feature ul { list-style: none; padding: 0; margin: 1.4rem 0 0; max-width: 33rem; }
.feature li { position: relative; padding: 0.6rem 0 0.6rem 1.6rem; border-top: 1px solid var(--line); color: var(--ink-2); }
.feature li::before { content: ""; position: absolute; left: 0.1rem; top: 1.05rem; width: var(--cell); height: var(--cell); border-radius: var(--cell-r); background: var(--c); }
/* A picture of the app: the piece of its window, at twice the size it's shown, on a card with a hairline. */
.card { margin: 0; border-radius: 14px; overflow: hidden; background: var(--surface); box-shadow: 0 0 0 1px var(--line), var(--shadow); }
.card img { width: 100%; }
/* Two cards, the second laid over the first's corner. */
.cards { position: relative; padding-bottom: 16%; }
.cards .card + .card { position: absolute; right: -2%; bottom: 0; width: 62%; }
@media (max-width: 820px) {
  .feature-grid, .feature.flip .feature-grid { grid-template-columns: 1fr; }
  .feature.flip .feature-text { order: 0; }
}

/* Sections on the canvas */
section { padding: clamp(4rem, 9vw, 6.5rem) 0; }
.hero, .features { padding-bottom: 0; }
.kicker { display: flex; align-items: center; gap: 0.55rem; font: 700 0.95rem/1.2 var(--font); color: var(--ink-3); margin: 0 0 0.9rem; }
.kicker::before { content: ""; width: var(--cell); height: var(--cell); border-radius: var(--cell-r); background: var(--coral); }
.section-head { max-width: 42rem; margin-bottom: clamp(2rem, 5vw, 3rem); }
.section-head p { color: var(--ink-2); font-size: 1.15rem; margin-top: 1.1rem; }

/* One computer or two */
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.pair > div { background: var(--surface); box-shadow: 0 0 0 1px var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2.2rem); }
.pair h3 { margin: 1.2rem 0 0.6rem; }
.pair p { color: var(--ink-2); margin: 0; }
.pair svg { width: 100%; height: auto; display: block; max-height: 9rem; }
.pair svg .box { fill: var(--mesh); stroke: var(--line-2); stroke-width: 1; }
.pair svg .lib { fill: var(--lilac); stroke: none; }
.pair svg text { fill: var(--ink-2); font: 600 12px var(--font); }
.pair svg .lib ~ text { fill: var(--black); }
.pair svg .box + text, .pair svg .box + text + text { fill: var(--ink-2); }
.pair svg .line { stroke: var(--ink-3); stroke-dasharray: 3 4; fill: none; }
.pair svg .arrow { fill: var(--ink-3); }
@media (max-width: 760px) { .pair { grid-template-columns: 1fr; } }

/* The privacy promise, on the app icon's ink. */
.night { background: var(--band); color: #f6f4ef; }
@media (prefers-color-scheme: dark) { .night { box-shadow: inset 0 1px 0 var(--band-line), inset 0 -1px 0 var(--band-line); } }
.night h2 { max-width: 16ch; font-size: clamp(2.3rem, 1.2rem + 4vw, 4.2rem); letter-spacing: -0.04em; line-height: 0.98; }
.night a { color: #fff; text-decoration-color: var(--mustard); }
.night :focus-visible { outline-color: #fff; }
.night .fine { color: rgb(246 244 239 / 0.72); margin-top: 2.5rem; }
.promises { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem 2.5rem; margin-top: 3rem; padding: 0; list-style: none; }
.promises li { border-top: 1px solid var(--band-line); padding-top: 1.2rem; color: rgb(246 244 239 / 0.78); }
.promises strong { display: flex; align-items: center; gap: 0.55rem; color: #fff; font: 750 1.15rem/1.25 var(--font); letter-spacing: -0.015em; margin-bottom: 0.45rem; }
.promises strong::before { content: ""; width: var(--cell); height: var(--cell); border-radius: var(--cell-r); background: var(--c, var(--lilac)); flex: none; }
.promises li:nth-child(4n+1) { --c: var(--lilac); }
.promises li:nth-child(4n+2) { --c: var(--sky); }
.promises li:nth-child(4n+3) { --c: var(--coral); }
.promises li:nth-child(4n+4) { --c: var(--mustard); }
@media (max-width: 860px) { .promises { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .promises { grid-template-columns: 1fr; } }

.cta-phone { display: grid; grid-template-columns: auto 1fr auto; gap: 1.5rem 2rem; align-items: center; background: var(--surface); box-shadow: 0 0 0 1px var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 4vw, 2.5rem); }
.cta-phone .phone-mark { width: 3.6rem; height: 3.6rem; border-radius: 0.97rem; display: grid; place-items: center; background: var(--sky); color: var(--black); }
.cta-phone .phone-mark svg { width: 26px; height: 26px; }
.cta-phone h2 { font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.2rem); }
.cta-phone p { color: var(--ink-2); margin: 0.6rem 0 0; }
@media (max-width: 720px) { .cta-phone { grid-template-columns: 1fr; } }

/* The last card: the app icon, what it costs, and the two downloads. */
.finale { padding-top: 0; }
.finale .section-head img { width: 5.5rem; height: 5.5rem; margin-bottom: 1.6rem; filter: drop-shadow(0 10px 18px rgb(22 19 29 / 0.25)); }
.finale .section-head h2 { font-size: clamp(2.4rem, 1.2rem + 4.6vw, 4.6rem); letter-spacing: -0.04em; line-height: 0.98; }
.download { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.dl { background: var(--surface); color: var(--ink); box-shadow: 0 0 0 1px var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2rem); display: flex; flex-direction: column; gap: 1rem; }
.dl.here { box-shadow: 0 0 0 2px var(--ink), var(--shadow); }
.dl .os { display: flex; align-items: center; gap: 0.7rem; }
.dl .os svg { width: 28px; height: 28px; fill: var(--ink); }
.dl h3 { font-size: 1.6rem; }
.dl p { color: var(--ink-2); font-size: 0.975rem; margin: 0; }
.dl .btn { align-self: flex-start; }
.dl .tag { font: 700 0.8rem/1 var(--font); color: var(--black); background: var(--mustard); padding: 0.35rem 0.55rem; border-radius: 0.3rem; margin-left: auto; visibility: hidden; }
.dl.here .tag { visibility: visible; }
@media (max-width: 760px) { .download { grid-template-columns: 1fr; } }

/* Long-form pages: the phone guide, privacy, terms, support. */
.page-head { padding: clamp(3rem, 7vw, 5rem) 0 clamp(1.5rem, 4vw, 2.5rem); }
.page-head h1 { font-size: clamp(2.4rem, 1.5rem + 3.6vw, 4rem); max-width: 18ch; }
.page-head .lede { margin-bottom: 0; }
.updated { font: 600 0.875rem/1.3 var(--font); color: var(--ink-3); margin: 1.2rem 0 0; }
.prose { padding-bottom: clamp(4rem, 9vw, 6rem); }
.prose h2 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.03em; line-height: 1.1; margin: 3rem 0 1rem; padding-top: 1.6rem; border-top: 1px solid var(--line); scroll-margin-top: 5rem; }
.prose h3 { font-size: 1.2rem; margin: 2rem 0 0.6rem; scroll-margin-top: 5rem; }
.prose p, .prose li { color: var(--ink-2); }
.prose strong { color: var(--ink); font-weight: 700; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1.2em; }
.prose ul { list-style: none; padding-left: 1.5rem; }
.prose ul > li { position: relative; }
.prose ul > li::before { content: ""; position: absolute; left: -1.35rem; top: 0.52em; width: 0.56rem; height: 0.56rem; border-radius: 0.15rem; background: var(--ink-3); }
.prose li { margin: 0.35rem 0; }
.prose ol > li::marker { color: var(--ink-3); font-weight: 700; }
.prose > :first-child { margin-top: 0; }
.callout { position: relative; background: var(--surface); box-shadow: 0 0 0 1px var(--line); padding: 1rem 1.2rem 1rem 2.6rem; border-radius: 14px; margin: 1.5rem 0; }
.callout::before { content: ""; position: absolute; left: 1.2rem; top: 1.45rem; width: var(--cell); height: var(--cell); border-radius: var(--cell-r); background: var(--lilac); }
.callout p:last-child { margin-bottom: 0; }
.callout p { color: var(--ink); }
.toc { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; padding: 0; margin: 1.8rem 0 0; }
.toc a { display: block; font-size: 0.9rem; font-weight: 600; padding: 0.42rem 0.85rem; border: 1px solid var(--line-2); border-radius: 999px; text-decoration: none; color: var(--ink-2); background: var(--surface); }
.toc a:hover { border-color: var(--ink-3); color: var(--ink); }

/* The phone guide's numbered steps, each number on a cell. */
.steps { list-style: none; padding: 0; margin: 1.5rem 0 0; counter-reset: s; }
.steps > li { counter-increment: s; position: relative; padding: 0 0 2rem 3.4rem; margin: 0; }
.steps > li::before { content: counter(s); position: absolute; left: 0; top: -0.1rem; width: 2.2rem; height: 2.2rem; border-radius: 0.6rem; display: grid; place-items: center; font: 800 1rem/1 var(--font); color: var(--black); background: var(--c, var(--lilac)); }
.steps > li:nth-child(4n+2) { --c: var(--sky); }
.steps > li:nth-child(4n+3) { --c: var(--coral); }
.steps > li:nth-child(4n+4) { --c: var(--mustard); }
.steps > li::after { content: ""; position: absolute; left: 1.05rem; top: 2.5rem; bottom: 0.4rem; width: 1px; background: var(--line-2); }
.steps > li:last-child::after { display: none; }
.steps h3 { margin: 0 0 0.5rem; font-size: 1.25rem; }
.steps code { overflow-wrap: anywhere; } /* the library's long address wraps on a narrow phone */
.platforms { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1rem 0 0; }
.platforms > div { background: var(--surface); box-shadow: 0 0 0 1px var(--line); border-radius: 14px; padding: 1rem 1.1rem; }
.platforms h4 { margin: 0 0 0.5rem; font: 750 1rem/1.3 var(--font); color: var(--ink); display: flex; align-items: center; gap: 0.45rem; }
.platforms h4 svg { width: 16px; height: 16px; fill: currentColor; }
.platforms ol { margin: 0; padding-left: 1.1rem; font-size: 0.975rem; }
@media (max-width: 620px) { .platforms { grid-template-columns: 1fr; } }

.faq details { border-top: 1px solid var(--line); padding: 0.2rem 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1rem 2rem 1rem 0; font-weight: 700; color: var(--ink); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 0.3rem; top: 1.35rem; width: 0.5rem; height: 0.5rem; border-right: 2px solid var(--ink-3); border-bottom: 2px solid var(--ink-3); transform: rotate(45deg); transition: transform 0.2s; }
.faq details[open] summary::after { transform: rotate(-135deg); top: 1.6rem; }
.faq details > :not(summary) { margin-top: 0; }
.faq details > p:last-child, .faq details > ul:last-child { margin-bottom: 1.1rem; }
@media (prefers-reduced-motion: reduce) { .faq summary::after { transition: none; } }

.table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.5rem; font-size: 0.975rem; }
.table th, .table td { text-align: left; vertical-align: top; padding: 0.7rem 0.8rem 0.7rem 0; border-top: 1px solid var(--line); color: var(--ink-2); }
.table th { color: var(--ink); font-weight: 700; width: 32%; }
.table-scroll { overflow-x: auto; }

.contact { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
.contact a { position: relative; display: block; text-decoration: none; background: var(--surface); box-shadow: 0 0 0 1px var(--line); border-radius: var(--radius); padding: 1.3rem 1.3rem 1.4rem; color: var(--ink); transition: box-shadow 0.2s; }
.contact a:hover { box-shadow: 0 0 0 1px var(--ink-3); }
.contact strong { display: flex; align-items: center; gap: 0.55rem; font: 800 1.2rem/1.25 var(--font); letter-spacing: -0.02em; margin-bottom: 0.4rem; }
.contact strong::before { content: ""; width: var(--cell); height: var(--cell); border-radius: var(--cell-r); background: var(--c, var(--lilac)); flex: none; }
.contact a:nth-child(2) { --c: var(--sky); }
.contact a:nth-child(3) { --c: var(--coral); }
.contact span { display: block; color: var(--ink-2); font-size: 0.975rem; }
@media (max-width: 760px) { .contact { grid-template-columns: 1fr; } }

/* Footer */
.site-foot { border-top: 1px solid var(--line); padding: 3rem 0 3.5rem; font-size: 0.95rem; color: var(--ink-3); }
.site-foot .wrap { display: grid; grid-template-columns: 1fr auto; gap: 1.5rem 3rem; align-items: start; }
.site-foot .brand { margin-bottom: 0.8rem; }
.site-foot .brand img { width: 28px; height: 28px; }
.site-foot .brand .tile-light { border-radius: 7px; }
.site-foot .wordmark { font-size: 1.1rem; }
.site-foot p { margin: 0; max-width: 30rem; }
.foot-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; list-style: none; margin: 0; padding: 0; }
.foot-links a { color: var(--ink-2); text-decoration: none; font-weight: 600; }
.foot-links a:hover { color: var(--ink); text-decoration: underline; }
@media (max-width: 640px) { .site-foot .wrap { grid-template-columns: 1fr; } }

/* The 404 page */
.lost { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.lost h1 { max-width: none; }
.lost p { color: var(--ink-2); }
.lost .btns { justify-content: center; }
.lost .kicker { justify-content: center; }
.lost .odd { width: 7rem; margin: 0 auto 1.6rem; }
.lost .odd svg { display: block; width: 100%; height: auto; }