:root {
  --ink: #17323a;
  --sea: #174b5b;
  --deep: #0d2c37;
  --foam: #eef3ef;
  --sand: #d3c5a1;
  --sand-light: #eee8d9;
  --rust: #b36543;
  --gold: #d5a55b;
  --paper: #f7f3ea;
  --white: #fff;
  --serif: "Newsreader", Georgia, serif;
  --sans: "DM Sans", Arial, sans-serif;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.65;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { color: var(--deep); background: #ecd49e; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; z-index: 100; top: .5rem; left: .5rem; padding: .7rem 1rem;
  background: white; color: var(--deep); transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed; z-index: 50; inset: 0 0 auto; height: 5.2rem;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--gutter); color: white; transition: background .3s, height .3s, box-shadow .3s;
}
.site-header.scrolled {
  height: 4.25rem; background: rgba(12, 42, 51, .94); box-shadow: 0 4px 24px rgba(6, 24, 29, .16);
  backdrop-filter: blur(12px);
}
.wordmark {
  display: flex;
  align-items: center;
  gap: .8rem;
  text-decoration: none;
  transform-origin: left center;
  transition: transform .32s cubic-bezier(.2,.75,.25,1);
}
.wordmark > span {
  display: grid; place-items: center; width: 2.1rem; aspect-ratio: 1;
  border: 1px solid rgba(255,255,255,.7); border-radius: 50%; font: 500 1rem var(--serif);
}
.wordmark strong { font-size: .84rem; font-weight: 500; letter-spacing: .09em; text-transform: uppercase; }
.main-nav { display: flex; gap: clamp(1rem, 2vw, 2.5rem); }
.main-nav a {
  position: relative;
  display: inline-block;
  font-size: .77rem;
  letter-spacing: .07em;
  text-decoration: none;
  text-transform: uppercase;
  transform-origin: center;
  transition: transform .28s cubic-bezier(.2,.75,.25,1), color .28s ease;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -.4rem; height: 1px;
  background: currentColor; transition: right .25s;
}
.main-nav a:hover::after, .main-nav a:focus-visible::after { right: 0; }
.wordmark:focus-visible,
.main-nav a:focus-visible { transform: scale(1.16); outline: 1px solid rgba(255,255,255,.7); outline-offset: .55rem; }
.menu-toggle { display: none; }

@media (hover: hover) {
  .wordmark:hover { transform: scale(1.15); }
  .main-nav a:hover { transform: scale(1.22); }
  .menu-toggle:hover { transform: scale(1.15); }
}

.hero { position: relative; min-height: min(94vh, 62rem); overflow: hidden; color: white; background: #78939d; }
.hero-photo,
.hero-water {
  position: absolute;
  inset: 0;
  background: url("../assets/images/hero-nordsee.png") center center / cover no-repeat;
}
.hero-photo { transform: scale(1.015); }
.hero-clouds {
  position: absolute;
  z-index: 1;
  top: 3%;
  left: -24%;
  width: 148%;
  height: 43%;
  opacity: .28;
  filter: blur(14px);
  mix-blend-mode: screen;
  background:
    radial-gradient(ellipse 19rem 4.8rem at 12% 48%, rgba(255,255,255,.75) 0 35%, transparent 67%),
    radial-gradient(ellipse 27rem 6rem at 40% 25%, rgba(230,238,239,.62) 0 34%, transparent 68%),
    radial-gradient(ellipse 23rem 5rem at 72% 60%, rgba(255,255,255,.6) 0 33%, transparent 68%),
    radial-gradient(ellipse 18rem 4.5rem at 92% 28%, rgba(225,235,238,.58) 0 32%, transparent 68%);
  animation: cloudPass 23s ease-in-out infinite alternate;
  will-change: transform;
}
.hero-water {
  z-index: 2;
  clip-path: polygon(0 47.5%, 100% 47.5%, 100% 66.5%, 0 66.5%);
  transform: scale(1.018);
  transform-origin: 50% 57%;
  filter: saturate(1.05) contrast(1.025);
  animation: livingSea 2.8s ease-in-out infinite alternate;
  will-change: transform, background-position;
}
.hero-water::after {
  content: "";
  position: absolute;
  inset: 47% -10% 33%;
  opacity: .25;
  mix-blend-mode: screen;
  background: repeating-radial-gradient(ellipse at 50% 100%, transparent 0 18px, rgba(255,255,255,.5) 20px 21px, transparent 23px 44px);
  animation: waterShimmer 2.2s linear infinite;
}
.hero-video { width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; z-index: 5; inset: 0; background: linear-gradient(90deg, rgba(7,29,36,.63), rgba(7,29,36,.1) 58%, transparent 78%), linear-gradient(0deg, rgba(7,29,36,.32), transparent 48%); }
.hero-content { position: relative; z-index: 6; width: min(90%, 82rem); margin: 0 auto; padding-top: clamp(10rem, 23vh, 15rem); }
.eyebrow { margin: 0 0 1rem; color: rgba(255,255,255,.78); font-size: .72rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; }
.eyebrow.dark { color: var(--rust); }
.hero h1, h2 { font-family: var(--serif); font-weight: 400; line-height: .92; letter-spacing: -.035em; }
.hero h1 { margin: 0; max-width: 9ch; font-size: clamp(5rem, 12vw, 10.5rem); text-shadow: 0 3px 30px rgba(8,30,35,.22); }
.hero-lead { margin: 1.6rem 0 2.2rem; font: 400 clamp(1.05rem, 1.6vw, 1.35rem)/1.55 var(--serif); }
.text-link { display: inline-flex; gap: .8rem; align-items: center; font-size: .74rem; font-weight: 600; letter-spacing: .16em; text-decoration: none; text-transform: uppercase; }
.hero-link { padding-bottom: .5rem; border-bottom: 1px solid rgba(255,255,255,.55); }
.hero-link span { transition: transform .2s; }
.hero-link:hover span { transform: translateY(.25rem); }
.coast-note { position: absolute; z-index: 6; right: var(--gutter); bottom: 2rem; margin: 0; font-size: .67rem; letter-spacing: .2em; text-transform: uppercase; writing-mode: vertical-rl; }

.section { padding: clamp(6rem, 11vw, 10rem) var(--gutter); }
.section-inner { width: min(100%, 82rem); margin: 0 auto; }
.author { background: var(--paper); }
.author-grid { display: grid; grid-template-columns: minmax(16rem, .78fr) 1.1fr; gap: clamp(3rem, 8vw, 9rem); align-items: center; }
.author-photo { position: relative; margin: 0; }
.author-photo::before { content: ""; position: absolute; inset: 1.4rem -1.4rem -1.4rem 1.4rem; border: 1px solid #bba971; }
.author-photo img { position: relative; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; filter: saturate(.82); }
.author-photo figcaption { position: relative; margin-top: 2rem; color: #6e7775; font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; }
h2 { margin: .2rem 0 1.8rem; font-size: clamp(3.2rem, 6vw, 6.2rem); }
.author-copy > p:not(.eyebrow) { max-width: 38rem; color: #506166; font-size: 1rem; }
.dropcap::first-letter { float: left; margin: .16em .1em 0 0; color: var(--rust); font: 500 4.2rem/.72 var(--serif); }
blockquote { margin: 2.8rem 0 0; padding-left: 1.5rem; border-left: 1px solid #c3a05d; font: italic 1.45rem/1.45 var(--serif); }

.books-section { position: relative; padding: clamp(6rem, 10vw, 9rem) var(--gutter); overflow: hidden; }
.crime-section { color: white; background: var(--deep); }
.crime-section::before {
  content: ""; position: absolute; inset: 0; opacity: .08;
  background: radial-gradient(circle at 10% 20%, white 0 1px, transparent 1.5px) 0 0 / 12px 12px;
}
.section-heading { position: relative; max-width: 47rem; margin-bottom: clamp(4rem, 7vw, 7rem); }
.section-heading h2 { margin-bottom: 1.2rem; }
.section-heading > p:last-child { max-width: 40rem; margin: 0; color: inherit; opacity: .7; }
.section-heading.centered { margin-inline: auto; text-align: center; }
.section-heading.centered > p:last-child { margin-inline: auto; }
.book-list { position: relative; display: grid; gap: clamp(4rem, 8vw, 8rem); }
.book-feature {
  display: grid;
  grid-template-columns: minmax(13rem, 20rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 3.5rem);
  align-items: center;
}
.book-feature:nth-child(even) { grid-template-columns: minmax(0, 1fr) minmax(13rem, 20rem); }
.book-feature:nth-child(even) .cover-wrap { order: 2; }
.book-feature:nth-child(even) .book-copy { width: min(100%, 39rem); justify-self: end; }
.book-cover {
  position: relative; display: grid; place-items: center; width: min(100%, 20rem); aspect-ratio: 2 / 3;
  padding: 2rem; color: white; background: linear-gradient(145deg, #245f6d, #102d38 68%, #b36b48);
  box-shadow: 1.6rem 2rem 4rem rgba(0,0,0,.24); overflow: hidden; isolation: isolate;
}
.book-cover::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .6; background: radial-gradient(circle at 50% 80%, transparent 0 28%, rgba(255,255,255,.18) 29% 30%, transparent 31% 40%, rgba(255,255,255,.08) 41% 42%, transparent 43%); }
.book-cover::after { content: ""; position: absolute; inset: .7rem; border: 1px solid rgba(255,255,255,.26); }
.book-cover strong { text-align: center; font: 400 clamp(1.8rem, 3vw, 2.8rem)/.95 var(--serif); }
.book-cover small { position: absolute; bottom: 1.4rem; font-size: .58rem; letter-spacing: .18em; text-transform: uppercase; }
.book-cover-real {
  --cover-scale: 1;
  --cover-hover-scale: 1.16;
  padding: .6rem;
  background: rgba(238,243,239,.08);
  cursor: zoom-in;
}
.book-cover-real::before,
.book-cover-real::after { display: none; }
.book-cover-real img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(.5rem .7rem .8rem rgba(0,0,0,.2));
  transform: scale(var(--cover-scale));
  transition: transform .55s cubic-bezier(.2,.7,.2,1);
}
.book-cover-real:hover img { transform: scale(var(--cover-hover-scale)); }
.cover-children-1,
.cover-children-2,
.cover-children-3,
.cover-christmas-1,
.cover-christmas-2 { --cover-scale: .9; --cover-hover-scale: 1.04; }
.book-copy .book-number { color: #92aeb4; font-size: .65rem; letter-spacing: .2em; text-transform: uppercase; }
.book-copy-reveal {
  opacity: 0;
  transition: opacity .9s ease, transform 1.1s cubic-bezier(.16,.76,.2,1);
  will-change: transform, opacity;
}
.book-copy-reveal.from-right { transform: translate3d(16rem, 0, 0); }
.book-copy-reveal.from-left { transform: translate3d(-16rem, 0, 0); }
.book-copy-reveal.visible { opacity: 1; transform: translate3d(0, 0, 0); }
.book-copy h3 { margin: .7rem 0 1.2rem; font: 400 clamp(2.1rem, 4vw, 3.8rem)/1 var(--serif); }
.book-copy p { max-width: 39rem; color: rgba(255,255,255,.66); }
.book-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; min-height: 2.85rem; padding: .65rem 1.2rem; border: 1px solid currentColor; font-size: .69rem; font-weight: 600; letter-spacing: .1em; text-decoration: none; text-transform: uppercase; }
.button-filled { color: var(--deep); border-color: var(--foam); background: var(--foam); }
.button-filled:hover { color: white; border-color: var(--rust); background: var(--rust); }
.button.disabled { opacity: .46; cursor: default; }

.interlude { display: grid; place-items: center; min-height: 24rem; padding: 4rem var(--gutter); text-align: center; background: #d5c49b; }
.interlude p { margin: 0; font: 400 clamp(2.8rem, 6vw, 5.5rem)/1.05 var(--serif); }
.interlude em { color: var(--rust); font-weight: 400; }

.children-section { background: #e9e0c9; }
.children-section::after { content: ""; position: absolute; width: 28rem; aspect-ratio: 1; right: -12rem; top: 4rem; border: 1px solid rgba(116,120,83,.26); border-radius: 50%; box-shadow: 0 0 0 3rem rgba(255,255,255,.08), 0 0 0 6rem rgba(255,255,255,.05); }
.book-grid { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.25rem, 3vw, 2.5rem); }
.book-card { display: flex; flex-direction: column; min-width: 0; }
.book-card .book-cover { width: 100%; box-shadow: .8rem 1rem 2.5rem rgba(49,47,35,.14); }
.book-card:nth-child(2) .book-cover { background: linear-gradient(145deg, #b86f4d, #7c4838 65%, #e3b06c); }
.book-card:nth-child(3) .book-cover { background: linear-gradient(145deg, #718c75, #365b5d 65%, #c9a760); }
.book-card h3 { margin: 1.5rem 0 .6rem; font: 400 1.9rem/1.05 var(--serif); }
.book-card .book-number { margin-top: 1.25rem; color: #8b6047; font-size: .62rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.book-card p { margin: 0 0 1.5rem; color: #596663; font-size: .91rem; }
.book-card .book-actions { margin-top: auto; }

.christmas-section { color: #f8efe1; background: radial-gradient(circle at 50% 0, #573939, #271c26 66%); }
.christmas-section::before { content: ""; position: absolute; inset: 0; opacity: .25; background: radial-gradient(circle at 50% 50%, #d7a451 0 1px, transparent 2px) 0 0 / 8rem 8rem; }
.snow { position: absolute; inset: 0; opacity: .45; background-image: radial-gradient(circle, white 0 1px, transparent 1.5px), radial-gradient(circle, white 0 1px, transparent 1.5px); background-size: 57px 57px, 83px 83px; background-position: 0 0, 20px 30px; animation: snow 18s linear infinite; }
.christmas-grid { max-width: 45rem; margin-inline: auto; grid-template-columns: repeat(2, 1fr); }
.christmas-grid .book-cover { background: linear-gradient(145deg, #893f3c, #4d2029 65%, #c4994e); }
.christmas-grid .book-card:nth-child(2) .book-cover { background: linear-gradient(145deg, #344f46, #182e30 65%, #af8344); }
.christmas-grid .book-card p { color: rgba(255,255,255,.65); }

.contact { background: #f3eee1; }
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 8vw, 8rem); align-items: end; }
.contact h2 { margin-bottom: 0; }
.contact-copy { padding-bottom: .8rem; color: #5b6868; }
.contact-placeholder { display: inline-block; margin-top: 1rem; padding-bottom: .4rem; border-bottom: 1px solid #aa754d; color: var(--rust); font-size: .72rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.site-footer { padding: 5rem var(--gutter) 2.5rem; color: rgba(255,255,255,.72); background: #0c2b34; text-align: center; }
.footer-mark { color: white; font: 400 clamp(3rem, 7vw, 6rem)/1 var(--serif); }
.site-footer > p { margin: 1rem auto 5rem; font: italic 1.15rem var(--serif); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.15); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; }
.footer-bottom small { opacity: .6; }

.reveal { opacity: 0; transform: translateY(2rem); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes livingSea {
  0% { transform: scale(1.022) translate3d(-.65%, .08%, 0); background-position: 49.2% center; }
  50% { transform: scale(1.027) translate3d(.15%, .32%, 0); }
  100% { transform: scale(1.022) translate3d(.8%, -.18%, 0); background-position: 50.9% center; }
}
@keyframes waterShimmer { to { transform: translateX(5.5rem); } }
@keyframes cloudPass {
  from { transform: translate3d(-3%, 0, 0) scale(1); }
  50% { transform: translate3d(3%, .7rem, 0) scale(1.025); }
  to { transform: translate3d(9%, 0, 0) scale(1); }
}
@keyframes snow { to { background-position: 57px 114px, -63px 196px; } }

@media (max-width: 780px) {
  .site-header { height: 4.5rem; }
  .wordmark strong { display: none; }
  .menu-toggle { display: grid; place-content: center; gap: 7px; width: 2.8rem; height: 2.8rem; padding: 0; border: 0; color: white; background: transparent; transition: transform .28s ease; }
  .wordmark, .menu-toggle { position: relative; z-index: 52; }
  .menu-toggle i { display: block; width: 1.5rem; height: 1px; background: currentColor; transition: transform .25s; }
  .menu-toggle[aria-expanded="true"] i:first-of-type { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] i:last-of-type { transform: translateY(-4px) rotate(-45deg); }
  .main-nav { position: fixed; inset: 0; z-index: 51; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 1.6rem; background: rgba(11,41,50,.98); opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s; }
  .main-nav.open { opacity: 1; visibility: visible; }
  .main-nav a { font: 400 2.2rem var(--serif); letter-spacing: 0; text-transform: none; }
  .hero { min-height: 48rem; }
  .hero-content { padding-top: 10.5rem; }
  .hero h1 { font-size: clamp(4.7rem, 24vw, 7.5rem); }
  .hero-lead br { display: none; }
  .hero-photo, .hero-water { background-position: 58% center; }
  .hero-water { clip-path: polygon(0 48%, 100% 48%, 100% 65%, 0 65%); }
  .coast-note { display: none; }
  .author-grid, .contact-grid { grid-template-columns: 1fr; }
  .author-photo { width: min(88%, 26rem); }
  .book-feature { grid-template-columns: minmax(8rem, .75fr) 1fr; gap: 2rem; align-items: start; }
  .book-feature:nth-child(even) { grid-template-columns: minmax(8rem, .75fr) 1fr; }
  .book-feature:nth-child(even) .cover-wrap { order: 0; }
  .book-feature:nth-child(even) .book-copy { width: auto; justify-self: stretch; }
  .book-copy-reveal.from-right,
  .book-copy-reveal.from-left { transform: translate3d(0, 2rem, 0); }
  .book-copy-reveal.visible { transform: translate3d(0, 0, 0); }
  .book-copy h3 { font-size: clamp(1.8rem, 7vw, 2.6rem); }
  .book-grid { grid-template-columns: 1fr; gap: 4rem; }
  .book-card { width: min(100%, 23rem); margin-inline: auto; }
  .christmas-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 520px) {
  .book-feature,
  .book-feature:nth-child(even) { grid-template-columns: 1fr; }
  .book-feature .cover-wrap { width: 74%; }
  .christmas-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}