:root {
  --fog: #cdd6d1;
  --fog-deep: #b4c0ba;
  --ink: #121c18;
  --ink-soft: #2c3b35;
  --deep: #1c3330;
  --slicker: #c89612;
  --slicker-ink: #1a1506;
  --foam: #f1f3f0;
  --line: color-mix(in srgb, var(--ink) 15%, transparent);
  --line-strong: color-mix(in srgb, var(--ink) 28%, transparent);
  --display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --body: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --pad: clamp(1.1rem, 3.4vw, 2.4rem);
  --max: 1180px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.75rem;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--fog);
  font-family: var(--body);
  font-optical-sizing: auto;
  font-size: 1.0625rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--slicker);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 80;
  padding: 0.55rem 0.8rem;
  background: var(--slicker);
  color: var(--slicker-ink);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.75rem;
}

.skip:focus {
  top: 1rem;
}

#boats,
#day,
#book {
  scroll-margin-top: 4.75rem;
}

.chart-rail {
  display: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem var(--pad);
  background: color-mix(in srgb, var(--fog) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1;
}

.brand-mark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-port {
  margin-top: 0.2rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--deep);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.65rem 1.05rem;
  border: 0;
  background: var(--slicker);
  color: var(--slicker-ink);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms var(--ease-out), filter 160ms ease;
}

.btn:hover {
  filter: brightness(1.05);
}

.btn:active {
  transform: scale(0.97);
}

.btn-ghost {
  background: transparent;
  color: var(--foam);
  border: 1px solid color-mix(in srgb, var(--foam) 45%, transparent);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  color: var(--foam);
}

.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 42% 52%;
}

.hero-loop {
  z-index: 0;
}

.hero-still {
  z-index: 0;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgb(18 28 24 / 0.18) 0%, rgb(18 28 24 / 0.08) 38%, rgb(18 28 24 / 0.72) 100%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 92vh;
  padding: 2.2rem var(--pad) 12rem;
}

.hero-kicker {
  margin: 0 0 0.55rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(4.6rem, 18vw, 12.5rem);
  line-height: 0.78;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.hero-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 1.4rem 2rem;
  width: 100%;
  margin-top: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-left: auto;
}

.hero-lede {
  margin: 0;
  max-width: 28rem;
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.4;
}

.tide {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: var(--ink);
  color: var(--foam);
  border-top: 1px solid color-mix(in srgb, var(--slicker) 55%, transparent);
  overflow-x: auto;
}

.tide-item {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  min-width: 11rem;
  padding: 0.95rem var(--pad);
  border-bottom: 1px solid color-mix(in srgb, var(--foam) 10%, transparent);
}

.tide-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--foam) 62%, transparent);
}

.tide-value {
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
}

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

.section {
  padding: 4.5rem 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: 2rem;
}

.eyebrow {
  margin: 0 0 0.45rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.section h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5.4vw, 4.2rem);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  text-wrap: balance;
}

.thesis {
  display: grid;
  gap: 2rem;
}

.thesis-copy p {
  margin: 0 0 1rem;
  font-size: 1.18rem;
}

.thesis-copy p:last-child {
  margin-bottom: 0;
}

.thesis-note {
  color: var(--ink-soft);
}

.frame {
  position: relative;
  width: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--deep);
}

.frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.frame figcaption {
  position: absolute;
  left: 0.8rem;
  bottom: 0.75rem;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--foam);
}

.fleet-list {
  display: grid;
  gap: 1.4rem;
}

.boat {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  background: color-mix(in srgb, var(--foam) 62%, transparent);
  border: 1px solid var(--line);
}

.boat img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.boat-body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1rem;
  padding: 1.1rem 1.15rem 1.2rem;
}

.boat-name {
  margin: 0;
  font-family: var(--display);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.boat-blurb {
  margin: 0;
}

.specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem 0.75rem;
  padding-top: 0.2rem;
  border-top: 1px solid var(--line);
}

.spec {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.spec dt {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.spec dd {
  margin: 0;
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.day {
  background: var(--deep);
  color: var(--foam);
}

.day .eyebrow {
  color: color-mix(in srgb, var(--foam) 62%, transparent);
}

.chapters {
  display: grid;
  gap: 2.4rem;
}

.chapter {
  display: grid;
  gap: 1.1rem;
}

.chapter-index {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slicker);
}

.chapter h3 {
  margin: 0.2rem 0 0.6rem;
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 0.88;
  text-transform: uppercase;
}

.chapter p {
  margin: 0;
  max-width: 36rem;
}

.chapter img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.practical {
  display: grid;
  gap: 2.6rem;
}

.include-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.include {
  display: grid;
  gap: 0.55rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--line);
}

.include h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.7rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.include p {
  margin: 0;
  color: var(--ink-soft);
}

.book {
  position: relative;
  padding: 4.5rem 0 5rem;
  color: var(--foam);
  overflow: hidden;
}

.book-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
}

.book-shade {
  position: absolute;
  inset: 0;
  background: rgb(18 28 24 / 0.62);
}

.book .wrap {
  position: relative;
  z-index: 1;
}

.ticket {
  display: grid;
  background: var(--foam);
  color: var(--ink);
}

.ticket-stub {
  padding: 1.2rem 1.15rem;
  background: var(--ink);
  color: var(--foam);
  border-bottom: 1px dashed color-mix(in srgb, var(--foam) 28%, transparent);
}

.stub-kicker,
.form-note {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ticket-stub h2 {
  margin: 0.45rem 0 0.7rem;
  color: var(--foam);
  font-family: var(--display);
  font-size: clamp(2.2rem, 5vw, 3.3rem);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.ticket-form,
.thanks {
  padding: 1.2rem 1.15rem 1.35rem;
}

.fields {
  display: grid;
  gap: 0.85rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field span {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.7rem 0.65rem;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  border-radius: 0;
}

.field textarea {
  min-height: 6.5rem;
  resize: vertical;
}

.pair {
  display: grid;
  gap: 0.85rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem 1.1rem;
  margin-top: 0.4rem;
}

.form-note {
  color: var(--ink-soft);
  max-width: 18rem;
}

.thanks {
  display: none;
}

.ticket.is-sent .ticket-form {
  display: none;
}

.ticket.is-sent .thanks {
  display: block;
}

.thanks h3 {
  margin: 0 0 0.6rem;
  font-family: var(--display);
  font-size: 2.4rem;
  text-transform: uppercase;
  line-height: 0.9;
}

.thanks p {
  margin: 0 0 0.8rem;
}

.site-footer {
  padding: 2rem var(--pad) 2.4rem;
  background: var(--ink);
  color: var(--foam);
}

.footer-grid {
  display: grid;
  gap: 1.4rem;
  width: min(100%, var(--max));
  margin-inline: auto;
}

.footer-brand {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 0.9;
}

.footer-meta {
  margin: 0.45rem 0 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--foam) 68%, transparent);
}

.footer-meta p {
  margin: 0 0 0.35rem;
}

@media (hover: hover) and (pointer: fine) {
  .boat img,
  .chapter img,
  .frame img {
    transition: transform 700ms var(--ease-out);
  }

  .boat:hover img,
  .chapter:hover img,
  .frame:hover img {
    transform: scale(1.03);
  }

  .chapter img {
    overflow: hidden;
  }
}

@media (max-width: 799px) {
  .brand-port {
    display: none;
  }

  .nav-links {
    gap: 0.6rem;
  }

  .nav-links a:not(.btn) {
    display: none;
  }

  .hero,
  .hero-copy {
    min-height: 78vh;
  }

  .hero-copy {
    padding-bottom: 5.5rem;
  }

  .hero-actions {
    margin-left: 0;
  }

  .hero-photo {
    object-position: 46% 80%;
  }

  .hero-title {
    font-size: clamp(3.6rem, 22vw, 5.2rem);
  }

  .boat img {
    aspect-ratio: 16 / 10;
  }

  .tide {
    grid-template-columns: 1fr 1fr;
  }

  .tide-item {
    min-width: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--foam) 10%, transparent);
  }

  .tide-item:nth-child(odd) {
    border-right: 1px solid color-mix(in srgb, var(--foam) 10%, transparent);
  }
}

@media (min-width: 800px) {
  .tide {
    grid-template-columns: repeat(4, 1fr);
  }

  .tide-item {
    min-width: 0;
    border-bottom: 0;
    border-right: 1px solid color-mix(in srgb, var(--foam) 10%, transparent);
  }

  .tide-item:last-child {
    border-right: 0;
  }

  .fleet-list {
    grid-template-columns: 1fr 1fr;
  }

  .pair {
    grid-template-columns: 1fr 1fr;
  }

  .include-grid {
    grid-template-columns: 1fr 1fr;
  }

  .include {
    padding: 2.1rem 2.4rem 2.15rem 0;
  }

  .include:nth-child(odd) {
    padding-right: 2.4rem;
    border-right: 1px solid var(--line);
  }

  .include:nth-child(even) {
    padding-left: 2.4rem;
    padding-right: 0;
  }

  .footer-grid {
    grid-template-columns: 1.2fr 1fr;
    align-items: end;
  }
}

@media (min-width: 960px) {
  .thesis {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: stretch;
    gap: 2.6rem;
  }

  .thesis .frame,
  .thesis .frame img {
    height: 100%;
    min-height: 22rem;
  }

  .ticket {
    grid-template-columns: minmax(15rem, 0.7fr) minmax(0, 1.3fr);
  }

  .ticket-stub {
    border-bottom: 0;
    border-right: 1px dashed color-mix(in srgb, var(--foam) 28%, transparent);
  }
}

@media (min-width: 1040px) {
  .chart-rail {
    display: flex;
    position: absolute;
    top: 5.2rem;
    left: var(--pad);
    z-index: 2;
    flex-direction: column;
    gap: 0.55rem;
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    color: color-mix(in srgb, var(--foam) 70%, transparent);
    pointer-events: none;
  }

  .chart-rail span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
  }

  .chart-rail span::after {
    content: "";
    width: 0.7rem;
    height: 1px;
    background: color-mix(in srgb, var(--foam) 35%, transparent);
  }

  .chapters {
    gap: 3.2rem;
  }

  .chapter {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: center;
    gap: 2.2rem;
  }

  .chapter:nth-child(even) {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .chapter:nth-child(even) .chapter-copy {
    order: 2;
  }

  .chapter img {
    min-width: 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .hero-loop {
    display: none;
  }
}