/* SHRPN. Black on white, or white on black. Nothing else. */
:root { --bg:#fff; --fg:#000; --muted:#767676; --line:#e2e2e2; --soft:#f4f4f4;
  --wordy:#ff9500; --passive:#0a84ff; --adverb:#a259ff; --weak:#8e8e93; --proof:#ff3b30; --ai:#8b5cf6;
  --good:#1f8a4c; --bad:#e0352b; --ease:cubic-bezier(.2,.7,0,1); color-scheme: light; }
:root[data-theme="dark"] { --bg:#000; --fg:#fff; --muted:#8c8c8c; --line:#232323; --soft:#0f0f0f; color-scheme: dark; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg:#000; --fg:#fff; --muted:#8c8c8c; --line:#232323; --soft:#0f0f0f; color-scheme: dark; } }
:root[data-theme="dark"] .invert-dark { filter: invert(1); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .invert-dark { filter: invert(1); } }

* { box-sizing: border-box; }
html { overflow-x: clip; }
html, body { margin: 0; background: var(--bg); color: var(--fg); transition: background-color .5s var(--ease), color .5s var(--ease); }
body { font: 17px/1.5 "Rethink Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
::selection { background: var(--fg); color: var(--bg); }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 680px; }

/* Top bar */
nav.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; gap: 16px; }
nav.top .logo img { height: 30px; display: block; }
nav.top .links { display: flex; gap: 22px; align-items: center; font-size: 15px; }
nav.top .links a { text-decoration: none; color: var(--muted); transition: color .2s; } nav.top .links a:hover { color: var(--fg); }

/* The black/white switch: a square cut on the logo's angle */
button.theme { width: 30px; height: 30px; padding: 6px; border: 0; background: none; color: var(--fg); cursor: pointer; flex: none; }
button.theme svg { display: block; width: 100%; height: 100%; transition: transform .6s var(--ease); }
button.theme:hover svg { transform: rotate(180deg); }

/* Type */
h1 { font-size: clamp(40px, 7vw, 88px); line-height: .98; letter-spacing: -0.04em; margin: 0 0 20px; font-weight: 800; }
h2 { font-size: clamp(28px, 4vw, 48px); letter-spacing: -0.03em; line-height: 1.04; margin: 0 0 14px; font-weight: 800; }
h3 { font-size: 18px; margin: 0 0 6px; font-weight: 800; letter-spacing: -0.01em; }
p.lead { font-size: clamp(18px, 2.1vw, 22px); color: var(--muted); max-width: 620px; margin: 0 0 28px; }
.muted { color: var(--muted); } .small { font-size: 14px; }
.label { font-size: 14px; color: var(--muted); }

/* Buttons: a black block, or just underlined text */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 15px 24px; border: 1px solid var(--fg); border-radius: 0;
  background: var(--fg); color: var(--bg); font: inherit; font-weight: 800; text-decoration: none; cursor: pointer; position: relative; overflow: hidden;
  transition: background-color .25s, color .25s; }
.btn:hover { background: var(--bg); color: var(--fg); }
.btn.ghost { background: transparent; color: var(--fg); }
.btn.ghost:hover { background: var(--fg); color: var(--bg); }
.btn.small { padding: 9px 14px; font-size: 14px; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .45; cursor: default; pointer-events: none; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

section { padding: 72px 0; }
.panel, .tile { border: 1px solid var(--line); padding: 24px; margin: 16px 0; background: var(--bg); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid.install { grid-template-columns: 1fr 1fr; }
.grid.install .tile { margin: 0; }
@media (max-width: 800px) { .grid, .grid.install { grid-template-columns: 1fr; } }
label { display: block; font-weight: 800; font-size: 14px; margin: 16px 0 6px; }
input, textarea, select { width: 100%; font: inherit; font-size: 16px; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 0; padding: 12px 14px; transition: border-color .2s; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--fg); }
textarea { min-height: 110px; resize: vertical; }
.keybox { font: 600 clamp(15px, 2.4vw, 20px)/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; border: 1px dashed var(--fg); padding: 16px; word-break: break-all; }
.pill { display: inline-block; padding: 2px 9px; font-size: 13px; font-weight: 800; border: 1px solid var(--fg); }
.pill.pro { background: var(--fg); color: var(--bg); }
.meter { height: 6px; background: var(--soft); overflow: hidden; }
.meter > i { display: block; height: 100%; background: var(--fg); transition: width .8s var(--ease); }
.notice { padding: 12px 14px; background: var(--soft); border: 1px solid var(--line); font-size: 15px; }
.notice.err { border-color: var(--bad); color: var(--bad); }
.notice.ok { border-color: var(--good); color: var(--good); }
.hidden { display: none !important; }
ol.steps { padding-left: 20px; } ol.steps li { margin: 6px 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--soft); padding: 1px 6px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; font-weight: 400; color: var(--muted); }
.table-wrap { overflow-x: auto; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 10px 0 20px; overflow-x: auto; }
.tabs button { background: none; border: 0; font: inherit; font-weight: 800; padding: 10px 14px; color: var(--muted); cursor: pointer; border-bottom: 1px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.tabs button.on { color: var(--fg); border-bottom-color: var(--fg); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.stat { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 14px 16px; }
.stat b { display: block; font-size: 28px; letter-spacing: -0.03em; }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 760px; }
@media (max-width: 700px) { .plans { grid-template-columns: 1fr; } }
.plan { border: 1px solid var(--line); padding: 26px; } .plan.pro { border-color: var(--fg); }
.plan .price { font-size: 34px; font-weight: 800; letter-spacing: -0.03em; margin: 6px 0 14px; }
.plan ul { padding-left: 18px; margin: 0 0 20px; } .plan li { margin: 4px 0; }
.prose h2 { font-size: 26px; margin-top: 36px; } .prose p, .prose li { color: var(--fg); }
footer { border-top: 1px solid var(--line); padding: 28px 0 48px; color: var(--muted); font-size: 14px; margin-top: 40px; }
footer .row { justify-content: space-between; }
footer a { text-decoration: none; } footer a:hover { color: var(--fg); }

/* The slice. One word cut in two along the logo's angle; the halves fly apart and the gap closes.
   Shared by the home page demos. */
.tok { display: inline-block; white-space: pre; vertical-align: top; position: relative; }
.tok .half { display: inline-block; white-space: pre; }
.tok .half.b { position: absolute; left: 0; top: 0; }
.tok .half.a { clip-path: polygon(0 0, 100% 0, 100% 38%, 0 62%); }
.tok .half.b { clip-path: polygon(0 62%, 100% 38%, 100% 100%, 0 100%); }
.tok.cutting { overflow: visible; }
.tok.cutting .half { transition: transform .55s var(--ease), opacity .45s ease .1s, filter .45s; }
.tok.cutting.go .half.a { transform: translate(-.18em, -.55em) rotate(-6deg); opacity: 0; }
.tok.cutting.go .half.b { transform: translate(.32em, .5em) rotate(4deg); opacity: 0; }
.tok.closing { overflow: hidden; transition: width .45s var(--ease); }
.tok.growing { overflow: hidden; transition: width .45s var(--ease), opacity .3s; }
.tok.fresh { animation: fresh 1.1s var(--ease); }
@keyframes fresh { 0% { color: var(--wordy); transform: translateY(.2em) scale(.96); } 35% { transform: translateY(-.04em) scale(1.03); } 100% { color: inherit; transform: none; } }
.slash { position: absolute; height: 2px; background: var(--fg); transform-origin: 0 50%; pointer-events: none; z-index: 2;
  transform: rotate(-12deg) scaleX(0); transition: transform .28s cubic-bezier(.6,0,.2,1), opacity .3s ease .25s; }
.slash.go { transform: rotate(-12deg) scaleX(1); opacity: 0; }
.pop { position: absolute; font-weight: 800; font-size: .42em; letter-spacing: 0; pointer-events: none; white-space: nowrap; z-index: 3;
  animation: pop 1.2s var(--ease) forwards; }
@keyframes pop { 0% { opacity: 0; transform: translateY(.4em) scale(.6); } 18% { opacity: 1; transform: translateY(-.3em) scale(1.12); } 30% { transform: translateY(-.4em) scale(1); } 100% { opacity: 0; transform: translateY(-1.6em); } }
.spark { position: absolute; width: 4px; height: 4px; background: var(--fg); pointer-events: none; z-index: 2; animation: spark .7s cubic-bezier(.1,.6,.2,1) forwards; }
@keyframes spark { to { transform: translate(var(--dx), var(--dy)) rotate(var(--r)); opacity: 0; } }

/* Fade things up as they scroll in */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1.2s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001s !important; transition-duration: .001s !important; }
}
.hit { animation: hit .22s cubic-bezier(.3,0,.2,1); }
@keyframes hit { 30% { transform: translate(2px, -1px); } 60% { transform: translate(-1px, 1px); } }
section.wrap { padding-top: 72px; padding-bottom: 72px; }