/* cuento's landing page: the app's paper and ink, its bookbinder's red,
 * Fraunces set large for the titles and Instrument Sans for the rest;
 * a shelf of cloth spines, and the year in review on a band of red
 * bookcloth stamped in gold. A phone first, one column; from 900px wide
 * the hero sits beside its phone. Light and dark follow the system.
 * Motion: Tilde sways and blinks, the hero rises once, and the rest
 * rises into view as it scrolls in, where the browser can tie animation
 * to scrolling; none of it when motion is reduced. The fonts are the
 * app's, under /app/fonts/. */

@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(/app/fonts/fraunces-latin-full-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: 'Fraunces';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(/app/fonts/fraunces-latin-ext-full-normal.woff2) format('woff2-variations');
  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: 'Instrument Sans';
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  src: url(/app/fonts/instrument-sans-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: 'Instrument Sans';
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  src: url(/app/fonts/instrument-sans-latin-ext-wght-normal.woff2) format('woff2-variations');
  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;
}

:root {
  --paper: #f7f2e8;
  --paper-2: #efe7d8;
  --card: #fffdf8;
  --ink: #2a241d;
  --muted: #6b6054; /* the app's muted, a shade darker for long text */
  --line: #e4dac8;
  --accent: #b5532c; /* a bookbinder's red */
  --accent-deep: #8e3d1f; /* the red's shadow, under a pressed button */
  --accent-ink: #fff8f0;
  --plate: #f6eedd; /* the bookplates the drawings sit on */
  --grain: 0.06; /* how much the paper's fibres show */
  --cream: #f6eedd;
  --gold: #e2c06e;
  --foil: linear-gradient(
    105deg,
    #9a7425 0%,
    #f4dc94 22%,
    #b98e33 40%,
    #fbecb8 55%,
    #a07a2a 75%,
    #e7c873 100%
  );
  --shadow: 0 1px 2px #3a2a1a14, 0 10px 30px #3a2a1a14;
  --glide: cubic-bezier(0.2, 0.8, 0.2, 1);
  --serif: 'Fraunces', ui-serif, Georgia, serif;
  --sans: 'Instrument Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --max: 1200px;
  --gutter: max(20px, env(safe-area-inset-left));
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171410;
    --paper-2: #1e1a15;
    --card: #221d17;
    --ink: #f1e9dc;
    --muted: #b3a693;
    --line: #3a3229;
    --accent: #e68a5f;
    --accent-deep: #a95a35;
    --accent-ink: #20140d;
    --plate: #ebe0ca;
    --grain: 0.09;
    --shadow: 0 1px 2px #0006, 0 10px 30px #0005;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  font: 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  /* Paper: a warm light from the top left over fine fibres. */
  background:
    radial-gradient(
      ellipse 80% 50% at 15% 0%,
      color-mix(in srgb, var(--card) 70%, transparent),
      transparent 70%
    ),
    radial-gradient(ellipse 60% 40% at 100% 30%, #c0702a10, transparent 70%), var(--paper);
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: var(--grain);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .35 0 0 0 0 .25 0 0 0 0 .15 0 0 0 1.4 -.4'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23f)'/%3E%3C/svg%3E");
}
a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--accent) 60%, transparent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--accent);
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}
h1,
h2,
h3,
p {
  margin: 0;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
.hidden,
.defs {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 9;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--paper);
}
.skip:focus {
  top: 12px;
}

/* Buttons: a cloth label, pressed into the page. */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  box-shadow: 0 3px 0 var(--line);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  transition:
    transform 0.15s var(--glide),
    box-shadow 0.15s var(--glide);
}
.button:hover {
  color: var(--ink);
  transform: translateY(-1px);
  box-shadow: 0 4px 0 var(--line);
}
.button:active {
  transform: translateY(3px);
  box-shadow: 0 0 0 var(--line);
}
.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 3px 0 var(--accent-deep);
  color: var(--accent-ink);
}
.button.primary:hover {
  box-shadow: 0 4px 0 var(--accent-deep);
}
.button.small {
  min-height: 40px;
  padding: 0 16px;
  border-radius: 12px;
  font-size: 15px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* The serif set large: soft and a little wonky, as in the app. */
h1,
h2,
h3,
.lede,
.big,
.mark span {
  font-family: var(--serif);
  font-variation-settings:
    'SOFT' 100,
    'WONK' 1;
}
.kicker {
  color: var(--muted);
  font: 600 13px/1.3 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.kicker i,
.name i {
  font-style: normal;
  color: var(--accent);
}
.section-title {
  max-width: var(--max);
  margin: 0 auto 28px;
  padding: 0 var(--gutter);
  font-size: clamp(36px, 8vw, 60px);
  font-weight: 650;
  line-height: 1;
  letter-spacing: -0.02em;
}

/* The bar along the top. */
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: max(14px, env(safe-area-inset-top)) var(--gutter) 0;
}
.mark {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.mark span {
  font-size: 24px;
  font-weight: 700;
}
.bar nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 15px;
  font-weight: 550;
}
.bar nav a:not(.button) {
  display: none;
  text-decoration: none;
}
@media (min-width: 760px) {
  .bar nav a:not(.button) {
    display: inline;
  }
}

/* The hero: Tilde on her book beside the name, then the phone. */
.hero {
  display: grid;
  overflow-x: clip; /* the cover behind the phone may reach past the edge */
  gap: 48px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px var(--gutter) 56px;
}
.pitch {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  column-gap: 4px;
}
.pitch .kicker,
.pitch .lede,
.pitch .sub,
.pitch .actions {
  grid-column: 1 / -1;
}
.pitch .kicker {
  order: -1;
  margin-bottom: 8px;
}
.pitch .tilde {
  width: clamp(84px, 22vw, 150px);
  height: auto;
  margin-bottom: 2px;
  overflow: visible;
}
h1 {
  font-size: clamp(76px, 22vw, 180px);
  font-weight: 750;
  font-variation-settings:
    'SOFT' 100,
    'WONK' 1,
    'opsz' 144;
  line-height: 0.8;
  letter-spacing: -0.045em;
  margin-bottom: 0.08em;
}
.lede {
  margin-top: 22px;
  font-size: clamp(28px, 7vw, 46px);
  font-weight: 560;
  line-height: 1.05;
  letter-spacing: -0.015em;
}
.lede span {
  display: block;
  color: var(--accent);
}
.sub {
  max-width: 34em;
  margin: 18px 0 28px;
  color: var(--muted);
  font-size: 18px;
}

/* The phone, with the year's red cover peeking out behind it. */
.stage {
  position: relative;
  justify-self: center;
  width: min(300px, 74vw);
  margin-right: 12vw;
}
.phone {
  position: relative;
  margin: 0;
  padding: 9px;
  border-radius: 48px;
  background: linear-gradient(145deg, #3a322a, #14110d);
  box-shadow:
    inset 0 0 0 1.5px #ffffff1f,
    0 2px 4px #0003,
    0 30px 60px -10px #3a1d0a55,
    0 60px 120px -30px #3a1d0a40;
}
/* The screen: a strip for the status bar, then the app. */
.phone picture {
  display: block;
  overflow: hidden;
  padding-top: 34px;
  border-radius: 39px;
  background: var(--paper);
}
.phone img {
  aspect-ratio: 390 / 844;
  object-fit: cover;
}
.phone::before {
  content: '';
  position: absolute;
  z-index: 1;
  top: 18px;
  left: 50%;
  width: 28%;
  height: 22px;
  border-radius: 12px;
  background: #0d0b09;
  transform: translateX(-50%);
}
.behind {
  position: absolute;
  top: 7%;
  left: 52%;
  width: 82%;
  border-radius: 28px;
  rotate: 9deg;
  box-shadow: 0 30px 60px -12px #2a0d0866;
}

/* A shelf of cloth spines, gold-banded, on a wooden plank. */
.shelf {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 3px;
  height: 116px;
  max-width: calc(var(--max) - 2 * 20px);
  margin: 0 auto;
  padding: 0 16px 14px;
  overflow: hidden;
  background:
    linear-gradient(#a06a3d, #6b4426) 0 calc(100% - 4px) / 100% 12px no-repeat,
    linear-gradient(#0000002e, transparent) 0 100% / 100% 4px no-repeat;
}
.shelf i {
  flex: none;
  width: 26px;
  height: var(--h);
  border-radius: 3px 3px 0 0;
  background:
    linear-gradient(
      transparent 10%,
      #e2c06eb3 10% 13%,
      transparent 13% 80%,
      #e2c06eb3 80% 83%,
      transparent 83%
    ),
    repeating-linear-gradient(0deg, #0000 0 2px, #00000014 2px 3px),
    linear-gradient(90deg, #ffffff30, transparent 45%, #00000040), var(--c);
  box-shadow: inset 0 0 0 1px #00000026;
}
.shelf i:nth-child(3n) {
  width: 32px;
}
.shelf i:nth-child(5n + 1) {
  width: 21px;
}
.shelf i:nth-child(7n + 3) {
  rotate: -4deg;
  transform-origin: bottom left;
  margin-left: 6px;
}

/* The name, and who Tilde is. */
.name {
  max-width: 40em;
  margin: 0 auto;
  padding: 64px var(--gutter) 24px;
  color: var(--muted);
  text-align: center;
}
.name .big {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(25px, 5.6vw, 36px);
  font-weight: 480;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.name b {
  color: var(--ink);
}

/* What it does: a card each, its drawing on a round bookplate. */
.features {
  padding: 72px 0 88px;
}
.grid {
  display: grid;
  gap: 16px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  list-style: none;
}
@media (min-width: 640px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 1000px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}
.feature {
  padding: 26px 26px 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.plate {
  width: 84px;
  height: 84px;
  margin-bottom: 18px;
  padding: 12px;
  border-radius: 50%;
  background: var(--plate);
  /* A tooled gold ring inside the plate's edge. */
  box-shadow:
    inset 0 0 0 4px var(--plate),
    inset 0 0 0 5.5px #c9a24f,
    0 1px 0 #00000014;
}
.feature h3 {
  margin-bottom: 8px;
  font-size: 24px;
  font-weight: 620;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.feature p {
  color: var(--muted);
}

/* The year in review, on red bookcloth: a fine weave, lit from above,
   darker at the edges, inside a gold tooled frame. */
.review {
  --cloth: #7d2f2b;
  position: relative;
  padding: 80px 0 88px;
  overflow: hidden;
  color: var(--cream);
  background:
    repeating-linear-gradient(0deg, #0000 0 2px, #00000018 2px 3px),
    repeating-linear-gradient(90deg, #0000 0 2px, #ffffff0a 2px 3px),
    radial-gradient(ellipse at 50% 20%, #ffffff1c, #0000 55%, #00000059 100%), var(--cloth);
}
.review::before {
  content: '';
  position: absolute;
  inset: 14px;
  border: 1.5px solid var(--gold);
  border-radius: 10px;
  box-shadow:
    inset 0 0 0 6px transparent,
    inset 0 0 0 7px #e2c06e80;
  pointer-events: none;
}
@media (prefers-color-scheme: dark) {
  .review {
    --cloth: #6a2723;
  }
}
.review-head {
  max-width: 36em;
  margin: 0 auto;
  padding: 0 calc(var(--gutter) + 12px);
  text-align: center;
}
.review .kicker {
  color: var(--gold);
}
.review h2 {
  margin: 10px 0 18px;
  font-size: clamp(46px, 12vw, 104px);
  font-weight: 650;
  line-height: 0.92;
  letter-spacing: -0.025em;
}
.foil {
  background: var(--foil) 0 0 / 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 1.5px 0 #00000070);
}
.review-head p:last-child {
  color: #f6eeddd9;
  font-size: 18px;
}

/* The cards: a row to swipe on a phone, a hand of cards on a wider
   screen. */
.cards {
  display: flex;
  gap: 14px;
  margin: 44px 0 0;
  padding: 16px 32px 28px;
  overflow-x: auto;
  list-style: none;
  scroll-snap-type: x mandatory;
  scroll-padding: 0 32px;
  scrollbar-width: none;
}
.cards li {
  flex: none;
  width: min(62vw, 250px);
  scroll-snap-align: center;
}
.cards img {
  border-radius: 22px;
  box-shadow:
    0 0 0 1px #ffffff1a,
    0 20px 40px -8px #1a0605aa;
}
@media (min-width: 1000px) {
  .cards {
    justify-content: center;
    max-width: 1500px;
    margin: 56px auto 0;
    padding: 24px 40px 32px;
    overflow: visible;
  }
  .cards li {
    width: clamp(140px, 12.5vw, 220px);
    margin: 0 -12px;
    rotate: var(--r);
    transition:
      transform 0.35s var(--glide),
      rotate 0.35s var(--glide);
  }
  .cards li:nth-child(even) {
    transform: translateY(26px);
  }
  .cards li:hover {
    position: relative;
    z-index: 1;
    rotate: 0deg;
    transform: translateY(-14px) scale(1.06);
  }
}

/* How to install: a card a kind of device, its steps numbered in red. */
.install {
  padding: 88px 0 40px;
}
.install .section-title {
  margin-bottom: 12px;
}
.intro {
  max-width: var(--max);
  margin: 0 auto 28px;
  padding: 0 var(--gutter);
  color: var(--muted);
  font-size: 18px;
}
.ways {
  display: grid;
  gap: 16px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  list-style: none;
}
@media (min-width: 840px) {
  .ways {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}
.way {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.way h3 {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 24px;
  font-weight: 620;
}
.way ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.way ol li {
  position: relative;
  padding-left: 40px;
  counter-increment: step;
}
.way ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 15px/1 var(--serif);
}
.note {
  max-width: var(--max);
  margin: 24px auto 0;
  padding: 0 var(--gutter);
  color: var(--muted);
  font-size: 15px;
}

/* Free, and open: the last word, on a deeper paper. */
.open {
  max-width: calc(var(--max) - 2 * 20px);
  margin: 64px auto 0;
  padding: 56px var(--gutter);
  border-top: 1px solid var(--line);
  text-align: center;
}
.open h2 {
  margin-bottom: 14px;
  font-size: clamp(36px, 8vw, 56px);
  font-weight: 650;
  line-height: 1;
}
.open p:not(.actions) {
  max-width: 34em;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 18px;
}
.open .actions {
  justify-content: center;
}

.foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px var(--gutter) max(40px, env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 15px;
  text-align: center;
}
.foot b {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
}

/* From 900px: the hero beside its phone. */
@media (min-width: 900px) {
  .bar {
    padding-top: 22px;
  }
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 40px;
    padding-top: 56px;
    padding-bottom: 88px;
  }
  .stage {
    width: 320px;
    margin-right: 90px;
  }
  .features {
    padding-top: 96px;
  }
}

/* Motion, only for those who don't mind it. */
@media (prefers-reduced-motion: no-preference) {
  /* Tilde's head sways on her neck; now and then she blinks. */
  .tilde .head {
    transform-box: view-box;
    transform-origin: 104px 124px;
    animation: sway 6s ease-in-out infinite;
  }
  .tilde .eyes circle {
    transform-box: fill-box;
    transform-origin: center;
    animation: blink 5s infinite;
  }
  /* The hero rises once, a line at a time. */
  .pitch > *,
  .stage {
    animation: rise 0.9s var(--glide) both;
  }
  .pitch .kicker {
    animation-delay: 0.05s;
  }
  .pitch h1 {
    animation-delay: 0.12s;
  }
  .pitch .lede {
    animation-delay: 0.22s;
  }
  .pitch .sub {
    animation-delay: 0.3s;
  }
  .pitch .actions {
    animation-delay: 0.38s;
  }
  .stage {
    animation-delay: 0.3s;
  }

  /* The rest rises into view as it scrolls in, each a little after the
     one before. */
  @supports (animation-timeline: view()) {
    .feature,
    .way,
    .name > *,
    .section-title,
    .review-head > *,
    .cards li,
    .shelf i {
      animation: rise linear both;
      animation-timeline: view();
      animation-range: entry calc(var(--i, 0) * 6%) entry calc(70% + var(--i, 0) * 6%);
    }
    .shelf i {
      animation-name: shelve;
      animation-range: entry 20% cover 35%;
    }
    /* The gold catches the light as the band passes. */
    .foil {
      animation: shine linear both;
      animation-timeline: view();
    }
  }
}
@keyframes rise {
  from {
    opacity: 0;
    translate: 0 28px;
  }
}
@keyframes shelve {
  from {
    translate: 0 100%;
  }
}
@keyframes shine {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}
@keyframes sway {
  0%,
  100% {
    transform: rotate(0);
  }
  30% {
    transform: rotate(-6deg);
  }
  65% {
    transform: rotate(4deg);
  }
}
@keyframes blink {
  0%,
  92%,
  100% {
    transform: scaleY(1);
  }
  95% {
    transform: scaleY(0.1);
  }
}

/* On a narrow phone, each feature's bookplate sits beside its title. */
@media (max-width: 639px) {
  .feature {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 16px;
    align-items: center;
    padding: 22px;
  }
  .feature .plate {
    width: 68px;
    height: 68px;
    margin: 0;
    padding: 9px;
  }
  .feature h3 {
    margin: 0;
    font-size: 22px;
  }
  .feature p {
    grid-column: 1 / -1;
    margin-top: 12px;
  }
}