:root {
  --ink: #071d2b;
  --ocean: #74c8e8;
  --ocean-deep: #157da6;
  --foam: #f7fcff;
  --sand: #f5df9b;
  --sun: #ffd560;
  --coral: #f36d4c;
  --paper: #f8f5e9;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: -5rem;
  left: 1rem;
  padding: .8rem 1rem;
  background: white;
}

.skip-link:focus { top: 1rem; }

.wave-nav {
  position: absolute;
  z-index: 20;
  inset: 0 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  color: var(--ink);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.wave-nav a { text-decoration: none; }
.wave-nav a:hover,
.wave-nav a:focus-visible { color: var(--ocean-deep); }

.wave-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, .6fr);
  align-items: center;
  min-height: 100svh;
  padding: clamp(7rem, 12vw, 10rem) clamp(1.2rem, 8vw, 8rem) clamp(8rem, 14vw, 12rem);
  background:
    linear-gradient(180deg, #dff6ff 0%, #fff8d8 64%, #f5df9b 100%);
}

.sun {
  position: absolute;
  z-index: -1;
  top: 9%;
  right: 12%;
  width: min(33vw, 460px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 2.4rem rgba(255,213,96,.18);
}

.hero-copy {
  position: relative;
  z-index: 3;
  max-width: 850px;
}

.eyebrow {
  margin: 0 0 .8rem;
  color: var(--ocean-deep);
  font-size: .74rem;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1,
h2,
.wave-button,
.design-current,
.reader-phase {
  font-family: "Arial Black", Arial, Helvetica, sans-serif;
}

h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3.8rem, 8vw, 8.5rem);
  line-height: .85;
  letter-spacing: -.07em;
  text-transform: uppercase;
}

h1 span {
  display: block;
  color: var(--ocean-deep);
}

.hero-lede {
  max-width: 680px;
  margin: 1.7rem 0 2rem;
  font-size: clamp(1.1rem, 2vw, 1.42rem);
  font-weight: 700;
  line-height: 1.5;
}

.wave-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.6rem;
  padding: .85rem 1.25rem;
  border: 4px solid var(--ink);
  color: var(--ink);
  background: var(--sun);
  box-shadow: .45rem .45rem 0 var(--ocean-deep);
  font-size: .85rem;
  text-decoration: none;
  text-transform: uppercase;
}

.wave-button:hover,
.wave-button:focus-visible {
  transform: translate(.14rem, .14rem);
  box-shadow: .3rem .3rem 0 var(--ocean-deep);
}

.cover-wrap {
  position: relative;
  z-index: 4;
  justify-self: center;
  width: min(100%, 350px);
  padding: .8rem;
  border: 5px solid var(--ink);
  background: white;
  box-shadow: 1rem 1rem 0 var(--coral);
  transform: rotate(3deg);
}

.cover-wrap img {
  display: block;
  width: 100%;
}

.cover-wrap span {
  display: block;
  padding: .8rem .2rem .1rem;
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .12em;
  text-align: center;
  text-transform: uppercase;
}

.hero-water {
  position: absolute;
  z-index: 1;
  right: -5%;
  bottom: -7rem;
  left: -5%;
  height: 15rem;
  background:
    radial-gradient(ellipse at 10% 0, transparent 0 35%, var(--foam) 36% 43%, transparent 44%),
    radial-gradient(ellipse at 35% 0, transparent 0 34%, var(--ocean) 35% 57%, transparent 58%),
    radial-gradient(ellipse at 68% 0, transparent 0 38%, var(--foam) 39% 46%, transparent 47%),
    radial-gradient(ellipse at 88% 0, transparent 0 34%, var(--ocean-deep) 35% 58%, transparent 59%);
  background-size: 32% 100%, 39% 100%, 35% 100%, 42% 100%;
  background-repeat: repeat-x;
  opacity: .92;
}

.promise {
  padding: clamp(5rem, 10vw, 9rem) clamp(1.2rem, 10vw, 10rem);
  text-align: center;
}

.promise h2,
.preview-heading h2,
.after-preview h2 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 6.2rem);
  line-height: .9;
  letter-spacing: -.045em;
  text-transform: uppercase;
}

.promise > p:not(.eyebrow) {
  max-width: 820px;
  margin: 1.5rem auto 2.5rem;
  font-size: 1.15rem;
  line-height: 1.65;
}

.design-current {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(900px, 100%);
  margin: 0 auto;
  border: 4px solid var(--ink);
  box-shadow: .65rem .65rem 0 var(--ocean);
}

.design-current span {
  display: grid;
  gap: .2rem;
  padding: 1.1rem .7rem;
  background: white;
  text-transform: uppercase;
}

.design-current span + span { border-left: 3px solid var(--ink); }

.design-current strong {
  color: var(--ocean-deep);
  font-size: 2rem;
}

.preview-section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 6vw, 6rem);
  color: white;
  background:
    radial-gradient(circle at 20% 10%, rgba(116,200,232,.18), transparent 30rem),
    var(--ink);
}

.preview-heading {
  display: grid;
  grid-template-columns: 1fr .72fr;
  gap: 2rem;
  align-items: end;
  max-width: 1220px;
  margin: 0 auto 2.5rem;
}

.preview-heading h2 { font-size: clamp(2.5rem, 5vw, 5.3rem); }

.preview-heading > p {
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: 1.05rem;
  line-height: 1.55;
}

.reader {
  width: min(1040px, 100%);
  margin: 0 auto;
}

.reader-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  color: rgba(255,255,255,.76);
  font-size: .75rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.reader-phase { color: var(--ocean); }

.page-stage {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) 4rem;
  gap: 1rem;
  align-items: center;
}

.book-page {
  width: min(100%, 560px);
  margin: 0 auto;
  padding: clamp(.55rem, 1.5vw, 1rem);
  border: 4px solid #020b10;
  background: #e6dfcc;
  box-shadow: 1rem 1rem 0 rgba(21,125,166,.55);
}

.book-page img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: contain;
  background: white;
}

.book-page figcaption {
  padding: .8rem .2rem .15rem;
  color: var(--ink);
  font-size: .75rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-align: center;
  text-transform: uppercase;
}

.page-arrow,
.reader-controls button {
  border: 3px solid white;
  color: white;
  background: transparent;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.page-arrow {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  font-size: 1.4rem;
}

.page-arrow:hover,
.page-arrow:focus-visible,
.reader-controls button:hover,
.reader-controls button:focus-visible {
  color: var(--ink);
  background: var(--sun);
}

.page-arrow:disabled,
.reader-controls button:disabled {
  opacity: .3;
  cursor: default;
}

.reader-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  margin-top: 2rem;
}

.reader-controls > button {
  min-height: 2.8rem;
  padding: .5rem 1rem;
  text-transform: uppercase;
}

.page-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .45rem;
}

.page-dots button {
  width: .75rem;
  height: .75rem;
  padding: 0;
  border: 2px solid rgba(255,255,255,.7);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.page-dots button[aria-current="true"] {
  border-color: var(--sun);
  background: var(--sun);
  transform: scale(1.25);
}

.after-preview {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr .45fr;
  gap: 3rem;
  align-items: center;
  min-height: 80svh;
  padding: clamp(5rem, 10vw, 9rem) clamp(1.2rem, 9vw, 9rem);
  background:
    linear-gradient(180deg, rgba(255,255,255,.3), transparent),
    var(--sand);
}

.after-copy {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.after-copy > p:not(.eyebrow) {
  max-width: 720px;
  margin: 1.5rem 0 2rem;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.55;
}

.wave-button-dark {
  color: white;
  background: var(--ink);
}

.message-bottle {
  position: relative;
  justify-self: center;
  width: min(210px, 70%);
  height: 440px;
  border: 12px solid rgba(21,125,166,.72);
  border-radius: 45% 45% 28% 28% / 18% 18% 12% 12%;
  background: rgba(255,255,255,.34);
  box-shadow: inset 0 0 2rem rgba(255,255,255,.7), .9rem .9rem 0 rgba(7,29,43,.16);
  transform: rotate(8deg);
}

.message-bottle::before {
  content: "";
  position: absolute;
  top: -70px;
  left: 25%;
  width: 50%;
  height: 80px;
  border: 10px solid var(--ink);
  border-bottom: 0;
  background: #c89055;
}

.message-bottle span {
  position: absolute;
  inset: 25% 16% auto;
  padding: 1.5rem .5rem;
  border: 3px solid var(--ink);
  background: #fff7dc;
  font-family: "Arial Black", sans-serif;
  font-size: 1.5rem;
  line-height: 1.05;
  text-align: center;
  transform: rotate(-8deg);
}

.wave-footer {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.6rem clamp(1.2rem, 5vw, 5rem);
  color: white;
  background: var(--ink);
  font-size: .78rem;
  font-weight: 700;
}

.wave-footer nav {
  display: flex;
  gap: 1rem;
}

@media (max-width: 850px) {
  .wave-hero,
  .preview-heading,
  .after-preview {
    grid-template-columns: 1fr;
  }

  .cover-wrap { margin-top: 2rem; }
  .message-bottle { margin-top: 5rem; }
}

@media (max-width: 620px) {
  .wave-nav { font-size: .62rem; }
  h1 { font-size: clamp(3.5rem, 17vw, 5.3rem); }
  .design-current { grid-template-columns: 1fr 1fr; }
  .design-current span:nth-child(3) { border-left: 0; border-top: 3px solid var(--ink); }
  .design-current span:nth-child(4) { border-top: 3px solid var(--ink); }
  .page-stage { grid-template-columns: 1fr; }
  .page-arrow { display: none; }
  .book-page { box-shadow: .55rem .55rem 0 rgba(21,125,166,.55); }
  .reader-controls { grid-template-columns: 1fr 1fr; }
  .page-dots { grid-column: 1 / -1; grid-row: 1; }
  .wave-footer { flex-direction: column; }
}

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