/*
 * pacenote.dev: the app's own look, as a page. The tokens are the app's (apps/web/src/index.css):
 * the canvas is the window chrome, one white content surface sits on it, and inside that surface
 * parts are split by hairlines and grouped in recessed wells. Surfaces, not borders, set the levels.
 * Type is the app's pair: Latin in Host Grotesk, served from here (fonts/, SIL OFL 1.1, the
 * license beside it), and Hangul in Pretendard. The page is English, so Pretendard is only taken
 * from the visitor's Mac when it is installed; nothing is fetched from another host. Code is in
 * the system's monospace.
 */

@font-face {
  font-family: 'Host Grotesk';
  src: url('fonts/host-grotesk-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 300 800;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308,
    U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Host Grotesk';
  src: url('fonts/host-grotesk-latin-ext-wght-normal.woff2') format('woff2-variations');
  font-weight: 300 800;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
    U+A720-A7FF;
}

@font-face {
  font-family: 'Pretendard';
  src: local('Pretendard Variable'), local('Pretendard');
  font-weight: 45 920;
  font-display: swap;
  unicode-range: U+1100-11FF, U+3130-318F, U+A960-A97F, U+AC00-D7A3, U+D7B0-D7FF;
}

:root {
  color-scheme: light;
  --radius: 0.625rem;
  --gradient: linear-gradient(74deg, #01ab78 0%, #1fc289 46%, #48c89c 100%);
  --canvas: oklch(0.975 0.01 165);
  --card: oklch(1 0 0);
  --card-accent: oklch(0.982 0.03 165);
  --well: oklch(0.972 0.008 168);
  --foreground: oklch(0.23 0.025 172);
  --muted-foreground: oklch(0.49 0.03 172);
  --primary: #007c5c;
  --primary-foreground: #ffffff;
  --secondary: oklch(0.945 0.018 165);
  --secondary-hover: oklch(0.925 0.024 165);
  --secondary-foreground: oklch(0.3 0.05 168);
  --border: oklch(0.91 0.016 168);
  --ring: rgba(12, 182, 126, 0.5);
  --track: #0cb67e;
  --card-shadow:
    0 1px 2px oklch(0.3 0.03 170 / 0.05),
    0 10px 28px -14px oklch(0.3 0.03 170 / 0.14);
  --window-shadow:
    0 1px 2px oklch(0.3 0.03 170 / 0.06),
    0 30px 70px -30px oklch(0.3 0.04 170 / 0.32);
  --sans: 'Pretendard', 'Host Grotesk', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Segoe UI',
    'Noto Sans KR', system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;
  --page: 70rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --canvas: oklch(0.183 0.013 175);
    --card: oklch(0.215 0.015 175);
    --card-accent: oklch(0.25 0.035 168);
    --well: oklch(0.19 0.013 175);
    --foreground: oklch(0.93 0.012 165);
    --muted-foreground: oklch(0.71 0.025 168);
    --primary: #3ccb96;
    --primary-foreground: #04281d;
    --secondary: oklch(0.25 0.02 172);
    --secondary-hover: oklch(0.28 0.025 172);
    --secondary-foreground: oklch(0.9 0.015 165);
    --border: oklch(0.9 0.05 165 / 11%);
    --ring: rgba(60, 203, 150, 0.6);
    --track: #2ec790;
    --card-shadow: 0 1px 2px oklch(0 0 0 / 0.25);
    --window-shadow: 0 1px 2px oklch(0 0 0 / 0.3), 0 30px 70px -30px oklch(0 0 0 / 0.7);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--foreground);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--primary);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--well);
  border-radius: 0.375rem;
  padding: 0.1em 0.35em;
}

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 0.375rem;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  padding: 0.5rem 0.875rem;
  background: var(--card);
  border-radius: var(--radius);
  z-index: 10;
}
.skip:focus {
  top: 1rem;
}

/* Buttons: the app's primary and secondary */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0 1rem;
  border: 0;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.button.primary {
  background: var(--primary);
  color: var(--primary-foreground);
}
.button.primary:hover {
  filter: brightness(1.08);
}
.button.secondary {
  background: var(--secondary);
  color: var(--secondary-foreground);
}
.button.secondary:hover {
  background: var(--secondary-hover);
}

/* The window chrome: brand at the left as in the sidebar, a few quiet links */
.top {
  max-width: var(--page);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--foreground);
  font-weight: 650;
  font-size: 1.125rem;
  text-decoration: none;
}
.top nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.top nav a:not(.button) {
  color: var(--muted-foreground);
  font-size: 0.9375rem;
  text-decoration: none;
}
.top nav a:not(.button):hover {
  color: var(--foreground);
}

/* Hero, on the canvas */
.hero {
  max-width: var(--page);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5.5rem) 1.5rem 0;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6.2vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 750;
}
.release {
  display: inline-flex;
  margin-bottom: 1.5rem;
  padding: 0.25rem 0.75rem;
  background: var(--secondary);
  color: var(--secondary-foreground);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 550;
  text-decoration: none;
}
.release:hover {
  background: var(--secondary-hover);
}
.lede {
  margin: 1.75rem 0 0;
  font-size: clamp(1.125rem, 1.9vw, 1.3125rem);
  line-height: 1.55;
  max-width: 54ch;
}
.next {
  margin: 0.875rem 0 0;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.get {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}
.command {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.375rem 0.375rem 1rem;
  background: var(--card);
  border-radius: calc(var(--radius) * 1.4);
  box-shadow: var(--card-shadow);
  max-width: 100%;
}
.command code {
  background: none;
  padding: 0;
  font-size: 0.9375rem;
  overflow-x: auto;
  white-space: nowrap;
}
.command .copy {
  min-height: 2.125rem;
  padding: 0 0.875rem;
  font-size: 0.875rem;
}
.copied {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.facts {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}
.facts li {
  padding: 0.125rem 0.625rem;
  background: var(--secondary);
  border-radius: 999px;
}

/* The product, as a window on the canvas */
.window {
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  border-radius: calc(var(--radius) * 1.6);
  overflow: hidden;
  box-shadow: var(--window-shadow);
  outline: 1px solid var(--border);
  outline-offset: -1px;
  position: relative;
  z-index: 1;
}
.window img {
  width: 100%;
}

/* The one content surface; sections inside it are split by hairlines */
.surface {
  width: min(100% - 3rem, var(--page) - 3rem);
  margin: -3rem auto 0;
  padding-top: 3rem;
  background: var(--card);
  border-radius: calc(var(--radius) * 2);
  box-shadow: var(--card-shadow);
}
.block {
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.25rem, 4vw, 3.5rem);
}
.block + .block {
  border-top: 1px solid var(--border);
}
.block h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 1.875rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.block h3 {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.35;
  font-weight: 650;
}
.block p {
  margin: 0.75rem 0 0;
}
.intro {
  max-width: 64ch;
}
.aside {
  color: var(--muted-foreground);
}

/* The track: the app's trajectory stepper, a task's stages in order */
.track {
  --dot: 1.5rem;
  --stages: 5;
  list-style: none;
  counter-reset: stage;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(var(--stages), 1fr);
  position: relative;
}
.track::before {
  content: '';
  position: absolute;
  left: calc(var(--dot) / 2);
  right: calc(100% / var(--stages) - var(--dot) / 2);
  top: calc(var(--dot) / 2 - 2px);
  height: 4px;
  border-radius: 999px;
  background: var(--track);
  transform-origin: left center;
}
.track li {
  counter-increment: stage;
  position: relative;
  padding-top: calc(var(--dot) + 0.875rem);
  padding-right: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}
.track li::before {
  content: counter(stage);
  position: absolute;
  top: 0;
  left: 0;
  width: var(--dot);
  height: var(--dot);
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 0.75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: 0 0 0 4px var(--card);
}
.track b {
  font-size: 1.0625rem;
  font-weight: 650;
}
.track span {
  color: var(--muted-foreground);
  font-size: 0.875rem;
  line-height: 1.4;
}

/* Drawn once when first seen: the line runs from the ask to how it ended, each stage lands on it */
@media (prefers-reduced-motion: no-preference) {
  .js .track::before {
    transform: scaleX(0);
    transition: transform 1100ms cubic-bezier(0.22, 0.8, 0.28, 1);
  }
  .js .track li {
    opacity: 0;
    transform: translateY(6px);
    transition:
      opacity 320ms ease-out,
      transform 320ms ease-out;
    transition-delay: calc(var(--i, 0) * 170ms);
  }
  .js .track.drawn::before {
    transform: scaleX(1);
  }
  .js .track.drawn li {
    opacity: 1;
    transform: none;
  }
  .track li:nth-child(2) { --i: 1; }
  .track li:nth-child(3) { --i: 2; }
  .track li:nth-child(4) { --i: 3; }
  .track li:nth-child(5) { --i: 4; }
}

/* A feature with its screen */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.shot,
.diagram {
  margin: 0;
  border-radius: calc(var(--radius) * 1.4);
  overflow: hidden;
  outline: 1px solid var(--border);
  outline-offset: -1px;
}
.shot {
  box-shadow: var(--card-shadow);
}

.pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
}
.pair h2 {
  font-size: clamp(1.375rem, 2.2vw, 1.5rem);
}

/* Smaller things, grouped in wells as the app groups them */
.wells {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.wells li {
  background: var(--well);
  border-radius: calc(var(--radius) * 1.6);
  padding: 1.25rem 1.375rem 1.375rem;
}
.wells p {
  margin-top: 0.375rem;
  font-size: 0.9375rem;
  color: var(--muted-foreground);
}

/* Numbered only where the content is a sequence */
.steps {
  list-style: none;
  counter-reset: step;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding-top: 2.25rem;
  font-size: 0.9375rem;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: 0.75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.steps.compact {
  grid-template-columns: 1fr;
  gap: 1rem;
}
.steps.compact li {
  padding: 0 0 0 2.25rem;
}
.steps.compact code {
  overflow-wrap: anywhere;
}
@media (min-width: 44rem) {
  .steps.compact code {
    white-space: nowrap;
  }
}
.diagram {
  margin-top: 2.25rem;
  background: var(--canvas);
}

/* Pace's promises, on the surface the app keeps for Pace's own voice */
.promise {
  background: var(--card-accent);
  border-radius: calc(var(--radius) * 2);
  padding: clamp(1.5rem, 4vw, 2.75rem);
}
.never {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 2.5rem;
}
.never li {
  padding: 0.875rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--muted-foreground);
}
.never b {
  display: block;
  color: var(--foreground);
  font-size: 1rem;
  font-weight: 650;
}

.needs {
  margin: 1.25rem 0 0;
  padding-left: 1.125rem;
  font-size: 0.9375rem;
}
.needs li + li {
  margin-top: 0.5rem;
}
.note {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* Questions, as rows split by hairlines */
.faq {
  margin-top: 1.25rem;
  max-width: 64ch;
}
.faq details {
  border-top: 1px solid var(--border);
}
.faq details:last-child {
  border-bottom: 1px solid var(--border);
}
.faq summary {
  padding: 1rem 0;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: '';
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.5rem;
  border-right: 2px solid var(--muted-foreground);
  border-bottom: 2px solid var(--muted-foreground);
  transform: rotate(45deg);
}
.faq details[open] summary::after {
  transform: rotate(225deg);
  margin-top: 0.75rem;
}
.faq details p {
  margin: 0 0 1.125rem;
  color: var(--muted-foreground);
  font-size: 0.9375rem;
}

/* The last word: the install command again */
.closing .get {
  margin-top: 1.25rem;
}

/* The status bar, as at the foot of the app's window */
.status {
  max-width: var(--page);
  margin: 0 auto;
  padding: 2rem 1.5rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem 2rem;
  font-size: 0.8125rem;
  color: var(--muted-foreground);
}
.status p {
  margin: 0;
}
.state {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--track);
}
.status nav {
  display: flex;
  gap: 1.25rem;
}
.status nav a {
  color: var(--muted-foreground);
}
.legal {
  grid-column: 1 / -1;
}

@media (max-width: 60rem) {
  .top nav a[href='#how'] {
    display: none;
  }
  .feature,
  .pair {
    grid-template-columns: 1fr;
  }
  .wells {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 44rem) {
  .top nav a:not(.button) {
    display: none;
  }
  /* The track turns to run down the page */
  .track {
    grid-template-columns: 1fr;
    gap: 1.125rem;
  }
  .track::before {
    left: calc(var(--dot) / 2 - 2px);
    right: auto;
    top: calc(var(--dot) / 2);
    bottom: calc(var(--dot) * 1.5);
    width: 4px;
    height: auto;
    transform-origin: center top;
  }
  .track li {
    padding: 0 0 0 calc(var(--dot) + 0.875rem);
  }
  @media (prefers-reduced-motion: no-preference) {
    .js .track::before {
      transform: scaleY(0);
    }
    .js .track.drawn::before {
      transform: scaleY(1);
    }
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .never {
    grid-template-columns: 1fr;
  }
  .status {
    grid-template-columns: 1fr;
  }
  .status nav {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}