/* graphsweeper.com. Colours and fonts follow the game. */

@font-face {
  font-family: 'Bebas Neue';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/bebas-neue-latin-normal.woff2') format('woff2');
  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: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/instrument-serif-latin-italic.woff2') format('woff2');
  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: 'Inter Variable';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('fonts/inter-latin-wght-normal.woff2') format('woff2-variations');
  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: 'JetBrains Mono Variable';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('fonts/jetbrains-mono-latin-wght-normal.woff2') format('woff2-variations');
  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;
}

:root {
  color-scheme: light dark;

  --paper: #F3F1EA;
  --paper-2: #FAF9F5;
  --paper-3: #ECE9E0;
  --line: #D8D4C8;
  --text: #1E2A24;
  --text-2: #55615A;
  --text-3: #667069;
  --accent: #47714E;

  /* Brand ground. */
  --ink: #1F3A2D;
  --ink-deep: #172C22;
  --on-ink: #F3F1EA;
  --on-ink-2: #C5CFC0;
  --on-ink-line: rgba(243, 241, 234, 0.16);
  --sage: #7FA07A;
  --sage-hi: #A9C89B;
  --mine: #C4563A;

  --wm-ink: #1F3A2D;
  --wm-ink-2: #7FA07A;

  --font-display: 'Bebas Neue', 'Oswald', 'Arial Narrow', system-ui, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter Variable', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono Variable', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --gutter: 16px;
  --radius: 22px;
  --shadow-phone: 0 28px 60px rgba(0, 0, 0, 0.36), 0 6px 18px rgba(0, 0, 0, 0.22);
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 10px 28px rgba(30, 42, 36, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0F1713;
    --paper-2: #16211B;
    --paper-3: #1E2B24;
    --line: #2C3B33;
    --text: #ECE8DE;
    --text-2: #AEB5AA;
    --text-3: #8A948C;
    --accent: #A9C89B;
    --ink: #1A3126;
    --ink-deep: #13241B;
    --wm-ink: #ECE8DE;
    --wm-ink-2: #A9C89B;
    --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 10px 28px rgba(0, 0, 0, 0.35);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 400 1rem/1.55 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

/* Focus ring in the accent colour, readable on paper and on ink. */
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 400;
}

p,
ul,
ol,
dl,
figure {
  margin: 0;
}

.wrap {
  width: min(1120px, 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 10;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--paper-2);
  color: var(--text);
}

.skip-link:focus {
  top: 12px;
}

/* ---------------------------------------------------------------- the ink */

.on-ink {
  --wm-ink: #ECE8DE;
  --wm-ink-2: #A9C89B;
  --accent: #A9C89B;
  background: var(--ink);
  color: var(--on-ink);
}

/* ------------------------------------------------------------ the wordmark */

/* Wordmark, coloured and animated as in the game. */
.graph-wordmark {
  width: 100%;
  height: auto;
  overflow: visible;
}

.graph-wordmark__node {
  fill: var(--wm-ink);
  opacity: 0.95;
}

.graph-wordmark__edge {
  stroke: var(--wm-ink);
  opacity: 0.62;
}

.graph-wordmark__word--1 .graph-wordmark__node {
  fill: var(--wm-ink-2);
}

.graph-wordmark__word--1 .graph-wordmark__edge {
  stroke: var(--wm-ink-2);
}

.graph-wordmark__word {
  transform-box: fill-box;
  transform-origin: center;
  animation: wordmark-drift 9s steps(3) infinite;
}

.graph-wordmark__word--1 {
  animation-duration: 11.5s;
  animation-direction: alternate-reverse;
}

@keyframes wordmark-drift {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  5%, 95% { transform: translateY(-0.043%) rotate(0.009deg); }
  10%, 90% { transform: translateY(-0.18%) rotate(0.037deg); }
  15%, 85% { transform: translateY(-0.412%) rotate(0.084deg); }
  20%, 80% { transform: translateY(-0.73%) rotate(0.149deg); }
  25%, 75% { transform: translateY(-1.1%) rotate(0.225deg); }
  30%, 70% { transform: translateY(-1.47%) rotate(0.301deg); }
  35%, 65% { transform: translateY(-1.788%) rotate(0.366deg); }
  40%, 60% { transform: translateY(-2.02%) rotate(0.413deg); }
  45%, 55% { transform: translateY(-2.157%) rotate(0.441deg); }
  50% { transform: translateY(-2.2%) rotate(0.45deg); }
}

/* --------------------------------------------------------------- headings */

.eyebrow {
  font: 500 0.75rem/1.2 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-title {
  font: 400 clamp(2.4rem, 8vw, 3.6rem)/0.95 var(--font-display);
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.section-lede {
  margin-top: 10px;
  max-width: 34rem;
  color: var(--text-2);
  font-size: 1.05rem;
}

.on-ink .section-lede {
  color: var(--on-ink-2);
}

/* ------------------------------------------------------------- the phone */

/* Plain device frame. */
.phone {
  position: relative;
  aspect-ratio: 9 / 16;
  padding: 3.2%;
  border-radius: 13% / 7.3%;
  background: #0B1410;
  box-shadow: var(--shadow-phone), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10.5% / 5.9%;
  background: var(--paper-3);
}

/* --------------------------------------------------------------- the CTA */

.store {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
}

/* Coming soon status. The store badge replaces it at launch. */
.store-soon {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 10px 20px 10px 16px;
  border: 1.5px solid currentColor;
  border-radius: 14px;
  line-height: 1.15;
}

.store-soon__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--mine);
  box-shadow: 0 0 0 4px rgba(196, 86, 58, 0.25);
}

.store-soon__label {
  display: block;
  font: 500 0.7rem/1.2 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.8;
}

.store-soon__where {
  display: block;
  font-weight: 650;
  font-size: 1.12rem;
}

.store-badge img {
  height: 56px;
  width: auto;
}

.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 0;
  list-style: none;
  font: 500 0.78rem/1.3 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Dot bullet. */
.facts li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sage-hi);
}

/* --------------------------------------------------------------- the hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 56px;
  background:
    radial-gradient(120% 70% at 85% 30%, rgba(169, 200, 155, 0.16), transparent 60%),
    radial-gradient(90% 60% at 0% 100%, rgba(196, 86, 58, 0.10), transparent 60%),
    var(--ink);
}

.hero__grid {
  display: grid;
  gap: 36px;
}

.hero__copy {
  display: grid;
  gap: 18px;
  justify-items: start;
}

.hero__mark {
  width: min(250px, 72vw);
  margin-top: 6px;
}

.hero__tagline {
  font: italic 400 clamp(2rem, 9vw, 3.4rem)/1.02 var(--font-serif);
  text-wrap: balance;
}

.hero__lede {
  max-width: 30rem;
  color: var(--on-ink-2);
  font-size: 1.06rem;
}

.hero__lede strong {
  color: var(--on-ink);
  font-weight: 600;
}

.hero__media {
  position: relative;
  width: min(100%, 380px);
  margin-inline: auto;
  /* Tall enough for the back phone's bottom bar to show below the front phone. */
  aspect-ratio: 380 / 496;
}

.hero__media .phone {
  position: absolute;
  width: 64%;
}

.hero__phone--front {
  left: 2%;
  top: 0;
  z-index: 2;
}

/* Smaller than the front phone, so its tilted box never outsizes the LCP image. */
.hero__media .hero__phone--back {
  right: 0;
  top: 27.5%;
  width: 52%;
  transform: rotate(4deg);
  opacity: 0.96;
}

@media (min-width: 900px) {
  .hero {
    padding: 56px 0 88px;
  }

  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
  }

  .hero__mark {
    width: 400px;
  }

  .hero__media {
    width: 100%;
    max-width: 520px;
  }
}

/* ------------------------------------------------------------ sections */

.section {
  padding: 64px 0;
}

@media (min-width: 900px) {
  .section {
    padding: 96px 0;
  }
}

.section__head {
  display: grid;
  gap: 4px;
  margin-bottom: 28px;
}

/* Sideways row on phones, grid from 760px. */
.rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(78%, 300px);
  gap: 16px;
  margin: 0 calc(-1 * var(--gutter));
  padding: 4px var(--gutter) 20px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gutter);
  scrollbar-width: thin;
  list-style: none;
}

.rail > * {
  scroll-snap-align: start;
}

@media (min-width: 760px) {
  .rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-columns: auto;
    margin: 0;
    padding: 0;
    overflow: visible;
  }
}

/* ------------------------------------------------------------ how it plays */

.step {
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.step__board img {
  width: 100%;
  height: auto;
  aspect-ratio: 1032 / 1100;
  background: var(--paper-3);
}

.step__text {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 18px 20px 22px;
}

.step__num {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font: 500 0.85rem/1 var(--font-mono);
  align-self: start;
}

.step h3 {
  font: 400 1.7rem/1 var(--font-display);
  letter-spacing: 0.01em;
}

.step p {
  color: var(--text-2);
}

/* ------------------------------------------------------------- the modes */

.modes {
  background:
    radial-gradient(80% 50% at 100% 0%, rgba(169, 200, 155, 0.12), transparent 60%),
    var(--ink-deep);
}

.modes__list {
  display: grid;
  gap: 28px;
  padding: 0;
  list-style: none;
}

.mode {
  display: grid;
  grid-template-columns: 38% 1fr;
  gap: 20px;
  align-items: center;
}

.mode h3 {
  font: 400 2rem/1 var(--font-display);
  letter-spacing: 0.01em;
}

.mode p {
  margin-top: 6px;
  color: var(--on-ink-2);
}

.mode__tag {
  display: block;
  margin-bottom: 6px;
  font: 500 0.7rem/1.2 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage-hi);
}

@media (min-width: 760px) {
  .modes__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
  }

  .mode {
    grid-template-columns: 1fr;
    gap: 24px;
    align-content: start;
  }

  .mode .phone {
    width: 78%;
  }
}

/* ------------------------------------------------------------ the shapes */

.shapes__grid {
  display: grid;
  grid-template-columns: 40% 1fr;
  gap: 22px;
  align-items: center;
}

.shapes .section-title {
  font-size: clamp(2rem, 7vw, 3.4rem);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  padding: 0;
  list-style: none;
}

.chips li {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--text-2);
  font: 500 0.72rem/1.2 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 520px) {
  .shapes__grid {
    grid-template-columns: 1fr;
  }

  .shapes .phone {
    width: 62%;
    margin-inline: auto;
    order: 2;
  }
}

@media (min-width: 900px) {
  .shapes__grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 64px;
  }

  .shapes .phone {
    width: 82%;
    justify-self: center;
  }
}

/* --------------------------------------------------------- free and full */

.offer {
  background: var(--paper-3);
}

.offer__grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 760px) {
  .offer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.offer__card {
  padding: 24px 22px 26px;
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: var(--shadow-card);
}

.offer__card--full {
  background: var(--ink);
  color: var(--on-ink);
  box-shadow: var(--shadow-phone);
}

.offer__card h3 {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font: 400 2.2rem/1 var(--font-display);
  letter-spacing: 0.01em;
}

.offer__price {
  font: 500 0.72rem/1.2 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.offer__card--full .offer__price {
  color: var(--sage-hi);
}

.ticks {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  padding: 0;
  list-style: none;
}

.ticks li {
  position: relative;
  padding-left: 30px;
}

/* Tick bullet. */
.ticks li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 0.38em;
  width: 16px;
  height: 9px;
  border-left: 2.5px solid var(--accent);
  border-bottom: 2.5px solid var(--accent);
  transform: rotate(-45deg);
}

.offer__card--full .ticks li::before {
  border-color: var(--sage-hi);
}

.offer__note {
  margin-top: 22px;
  font: 500 0.8rem/1.4 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  text-align: center;
}

.extras {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  margin-top: 40px;
  padding: 0;
  list-style: none;
  color: var(--text-2);
  font-size: 0.95rem;
}

.extras li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.extras li::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sage);
}

/* ------------------------------------------------------------- the finale */

.finale {
  padding: 72px 0 80px;
  text-align: center;
  background:
    radial-gradient(70% 80% at 50% 0%, rgba(169, 200, 155, 0.14), transparent 65%),
    var(--ink);
}

.finale__inner {
  display: grid;
  justify-items: center;
  gap: 22px;
}

.finale__mark {
  width: min(260px, 70vw);
}

.finale .store {
  justify-content: center;
}

.finale__small {
  color: var(--on-ink-2);
  font: 500 0.75rem/1.4 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* -------------------------------------------------------------- the footer */

.site-footer {
  padding: 28px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--text-3);
  font-size: 0.9rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.site-footer a {
  color: var(--text-2);
}

.site-footer__legal {
  flex-basis: 100%;
  font-size: 0.78rem;
}

/* ---------------------------------------------------- the plain pages */

.page-header {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}

.page-header a {
  display: inline-block;
  width: 132px;
}

.page {
  padding: 44px 0 72px;
}

.prose {
  max-width: 42rem;
}

.prose h1 {
  font: 400 clamp(2.6rem, 9vw, 3.6rem)/0.95 var(--font-display);
  letter-spacing: 0.01em;
}

.prose h2 {
  margin-top: 36px;
  font: 400 1.75rem/1.05 var(--font-display);
  letter-spacing: 0.01em;
}

.prose h3 {
  margin-top: 22px;
  font-weight: 650;
  font-size: 1.05rem;
}

.prose p,
.prose ul,
.prose dl {
  margin-top: 12px;
}

.prose ul {
  padding-left: 1.3em;
}

.prose li + li {
  margin-top: 6px;
}

.prose .meta {
  margin-top: 10px;
  color: var(--text-3);
  font: 500 0.78rem/1.4 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.prose .lede {
  margin-top: 16px;
  font-size: 1.12rem;
  color: var(--text-2);
}

.mail {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding: 16px 22px;
  border-radius: 16px;
  background: var(--ink);
  color: var(--on-ink);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.mail:hover {
  background: #2A4A3A;
}

.qa dt {
  margin-top: 18px;
  font-weight: 650;
}

.qa dd {
  margin: 4px 0 0;
  color: var(--text-2);
}

/* ------------------------------------------------------------- motion */

@media (prefers-reduced-motion: reduce) {
  .graph-wordmark__word {
    animation: none;
  }
}