:root {
  --ink: #2d2a26;
  --paper: #fbf5e6;
  --sun: #f4c534;
  --teal: #1f7f86;
  --leaf: #4f8a3a;
  --card-w: min(440px, calc(100vw - 32px));
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #8fd3ef;
  color: var(--ink);
  font: 400 17px/1.6 "Manrope", system-ui, sans-serif;
}

/* ---------------------------------------------------------------- scene */

.viewport {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.scene {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.scene.ready {
  opacity: 1;
}

.layer {
  position: absolute;
  inset: 0;
  will-change: transform;
}

.layer > img.full {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.layer img {
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.cloud {
  position: absolute;
  left: 0;
  will-change: transform;
}

.cloud.far {
  opacity: 0.92;
}

.island {
  position: absolute;
  animation: float 11s ease-in-out infinite alternate;
}

.island > img {
  width: 100%;
}

.lantern {
  position: absolute;
  animation: sway var(--d, 3.4s) ease-in-out var(--delay, 0s) infinite alternate;
}

.rotor {
  position: absolute;
  aspect-ratio: 1;
  translate: -50% -50%;
  overflow: visible;
}

.rotor .blades {
  animation: spin var(--spin, 8s) linear infinite;
  transform-box: view-box;
  transform-origin: 0 0;
}

.rotor path,
.rotor circle {
  fill: #f5f6f1;
  stroke: #34373a;
  stroke-width: 2.8;
  stroke-linejoin: round;
}

.ship {
  position: absolute;
  left: 0;
  top: 0;
  will-change: transform;
}

.ship-flip {
  transition: transform 0.7s cubic-bezier(0.6, 0, 0.3, 1);
}

.ship-flip.left {
  transform: scaleX(-1);
}

.ship-bob {
  position: relative;
  animation: bob 4.8s ease-in-out infinite alternate;
}

.ship-bob > img {
  width: 100%;
}

.ship-basket {
  position: absolute;
  animation: swing 2.7s ease-in-out infinite alternate;
}

.particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

@keyframes float {
  from {
    transform: translateY(0) rotate(-0.25deg);
  }
  to {
    transform: translateY(-1.3%) rotate(0.35deg);
  }
}

@keyframes sway {
  from {
    rotate: -2.2deg;
  }
  to {
    rotate: 2.6deg;
  }
}

@keyframes swing {
  from {
    rotate: -1.6deg;
  }
  to {
    rotate: 1.8deg;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes bob {
  from {
    transform: translateY(-2.5%) rotate(-1.2deg);
  }
  to {
    transform: translateY(2.5%) rotate(1deg);
  }
}

/* Paper grain over the whole page brings back the watercolour texture. */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .42  0 0 0 0 .36  0 0 0 0 .26  0 0 0 .38 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ---------------------------------------------------------------- top bar */

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 56px);
}

.brand {
  font: 700 30px/1 "Fraunces", Georgia, serif;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
  padding: 6px 16px 8px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 14px;
  box-shadow: 4px 4px 0 var(--ink);
}

.nav {
  display: flex;
  gap: 4px;
  padding: 5px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border: 2px solid var(--ink);
  border-radius: 999px;
  box-shadow: 4px 4px 0 var(--ink);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav a {
  padding: 7px 16px;
  border-radius: 999px;
  color: var(--ink);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s ease;
}

.nav a:hover {
  background: color-mix(in srgb, var(--sun) 35%, transparent);
}

.nav a[aria-current="page"] {
  background: var(--sun);
  box-shadow: inset 0 0 0 2px var(--ink);
}

.nav a:focus-visible,
.brand:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- cards */

.cards {
  position: fixed;
  z-index: 5;
  left: clamp(16px, 4vw, 56px);
  top: 50%;
  translate: 0 -46%;
  width: var(--card-w);
  display: grid;
}

.card {
  grid-area: 1 / 1;
  align-self: center;
  padding: 30px 34px 28px;
  background: color-mix(in srgb, var(--paper) 95%, transparent);
  border: 2px solid var(--ink);
  border-radius: 18px;
  box-shadow: 7px 7px 0 var(--ink);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) rotate(-0.6deg);
  transition:
    opacity 0.45s ease,
    transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1),
    visibility 0s linear 0.45s;
}

.card.active {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition:
    opacity 0.5s ease 0.15s,
    transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.15s,
    visibility 0s;
}

.kicker {
  margin: 0 0 6px;
  color: var(--teal);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.card h1,
.card h2 {
  margin: 0 0 14px;
  font: 700 clamp(30px, 3.2vw, 42px) / 1.08 "Fraunces", Georgia, serif;
}

.card p {
  margin: 0 0 12px;
}

.card ul,
.card ol {
  margin: 0;
  padding-left: 22px;
}

.card li {
  margin: 0 0 8px;
}

.card li::marker {
  color: var(--leaf);
  font-weight: 700;
}

.steps {
  list-style: none;
  counter-reset: step;
}

.card .steps {
  padding: 0;
}

.steps li {
  counter-increment: step;
  margin: 0 0 10px;
  line-height: 1.45;
}

.steps strong {
  display: block;
  font: 700 18px/1.3 "Fraunces", Georgia, serif;
}

.steps strong::before {
  content: counter(step, decimal-leading-zero) " — ";
  color: var(--leaf);
}

/* ---------------------------------------------------------------- small screens */

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
  }

  .brand {
    font-size: 24px;
  }

  .nav {
    max-width: 100%;
    gap: 0;
  }

  .nav a {
    padding: 6px 10px;
    font-size: 13px;
  }

  .cards {
    top: auto;
    bottom: 16px;
    translate: none;
  }

  .card {
    padding: 20px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0s !important;
  }
}