/* ============================================================
   OPTIMIST – SAILING FOR BEGINNERS
   Static site stylesheet
   Palette: Night Ink, Pulp Cream, Sea Blue, Signal Gold, Brick,
   Smoke Gray. Marine print, warm paper, flat two-tone shadows.
   ============================================================ */

:root {
  --night: #11151c;
  --paper: #f1d7a2;
  --paper-light: #f8eccb;
  --gold: #f2b705;
  --brick: #a92d32;
  --sea: #214b78;
  --sea-deep: #173653;
  --sea-ink: #eaf2f9;
  --smoke: #454b54;

  --font-display: Impact, Haettenschweiler, "Arial Narrow Bold", "Arial Narrow", "Liberation Sans Narrow", sans-serif;
  --font-body: Georgia, "Times New Roman", "Liberation Serif", serif;
  --font-util: "Arial", "Helvetica Neue", Helvetica, "Liberation Sans", sans-serif;

  --rule: 2px solid var(--night);
  --shadow: 6px 6px 0 var(--night);

  --maxw: 1080px;
}

/* Reset + base */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--night);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* paper grain via layered gradients */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(17,21,28,0.045) 0 1px, transparent 1.5px),
    radial-gradient(circle at 80% 70%, rgba(17,21,28,0.045) 0 1px, transparent 1.5px),
    repeating-radial-gradient(rgba(17,21,28,0.02) 0 1px, transparent 1px 3px);
  background-size: 37px 37px, 53px 53px, 97px 97px;
  mix-blend-mode: multiply;
}

main, header, footer { position: relative; z-index: 1; }

img, svg { display: block; max-width: 100%; height: auto; }

/* Skip link */
.skip-link {
  position: absolute; left: 1rem; top: -100px; z-index: 50;
  background: var(--gold); color: var(--night);
  padding: 0.5rem 0.9rem; border: var(--rule);
  font-family: var(--font-util); font-weight: 700; text-decoration: none;
}
.skip-link:focus { top: 0.75rem; }

/* Headings */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.025em;
  line-height: 1.06;
  text-transform: uppercase;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.5rem, 8vw, 5rem); }
h2 { font-size: clamp(1.6rem, 4.5vw, 2.3rem); }
h3 { font-size: clamp(1.15rem, 2.6vw, 1.45rem); }

p { margin: 0 0 1em; }
a { color: var(--sea-deep); }
a:hover { color: var(--brick); }

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

::selection { background: var(--gold); color: var(--night); }

/* ============ Header / nav ============ */
.site-header {
  border-bottom: 4px solid var(--night);
  background: var(--paper);
}

.nav-wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--sea-deep);
  text-decoration: none;
  text-transform: uppercase;
  line-height: 1.2;
}
.brand em { font-style: normal; color: var(--brick); }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list a {
  font-family: var(--font-util);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--night);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.nav-list a:hover { border-bottom-color: var(--sea); color: var(--sea-deep); }
.nav-list a:focus-visible { outline-offset: 4px; }

/* ============ Hero ============ */
.hero {
  background: var(--sea-deep);
  color: var(--sea-ink);
  padding: clamp(2.5rem, 7vw, 5rem) 1.25rem clamp(3rem, 8vw, 6rem);
  position: relative;
  overflow: hidden;
  border-bottom: 4px solid var(--night);
}
.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
@media (max-width: 820px) { .hero-inner { grid-template-columns: 1fr; } }

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-util);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  border: 2px solid var(--gold);
  padding: 0.35rem 0.7rem;
  margin-bottom: 1.2rem;
  background: rgba(17,21,28,0.35);
}

.hero h1 { color: var(--paper); margin-bottom: 0.3em; }
.hero h1 .wave { display: inline-block; transform: rotate(0.02turn); }
.hero h1 .gold { color: var(--gold); }

.hero p.lede {
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  max-width: 46ch;
  color: #d9e5f0;
  margin-bottom: 1.6rem;
}

.hero-cta {
  display: inline-block;
  background: var(--gold);
  color: var(--night);
  border: var(--rule);
  box-shadow: var(--shadow);
  font-family: var(--font-util);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.4rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.hero-cta:hover, .hero-cta:focus-visible { transform: translate(2px, 2px); box-shadow: 3px 3px 0 var(--night); }
.hero-cta:focus-visible { outline: 3px solid var(--paper); }

/* boat silhouette in hero */
.hero-art { background: var(--sea); border: var(--rule); box-shadow: var(--shadow); padding: 1rem; }
.figcapt {
  font-family: var(--font-util);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: #cfe0ee;
  text-align: center;
  margin-top: 0.6rem;
}

/* hero waves animation */
.hero-sky {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(242,183,5,0.12), transparent 30%),
    radial-gradient(circle at 85% 60%, rgba(242,183,5,0.08), transparent 35%),
    repeating-linear-gradient(160deg, rgba(255,255,255,0.03) 0 2px, transparent 2px 9px);
  z-index: 0;
}
.hero-inner { z-index: 1; position: relative; }

/* ============ Sections ============ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) 1.25rem;
}

.section--dark {
  background: var(--sea);
  color: var(--sea-ink);
  max-width: none;
  border-top: 4px solid var(--night);
  border-bottom: 4px solid var(--night);
}
.section--dark .inner { max-width: var(--maxw); margin: 0 auto; }
.section--dark h2 { color: var(--paper); }
.section--dark a { color: var(--gold); }
.section--dark a:hover { color: var(--paper); }

.kicker {
  display: block;
  font-family: var(--font-util);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brick);
  margin-bottom: 0.7rem;
}
.section--dark .kicker { color: var(--gold); }

.lede { max-width: 60ch; }

/* intro two-column */
.intro-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 820px) { .intro-grid { grid-template-columns: 1fr; } }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-util);
  font-size: 0.92rem;
  background: var(--paper-light);
  border: var(--rule);
  box-shadow: var(--shadow);
}
.spec-table caption {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--night);
  color: var(--paper);
  padding: 0.55rem 0.8rem;
  border: var(--rule);
  border-bottom: none;
  text-align: left;
  font-size: 1rem;
}
.spec-table th, .spec-table td { padding: 0.55rem 0.8rem; border: 1px solid rgba(17,21,28,0.5); text-align: left; }
.spec-table th { background: var(--sea); color: var(--sea-ink); width: 40%; font-weight: 700; }
.spec-table td { font-weight: normal; }
.spec-table tr:nth-child(even) td { background: rgba(242,183,5,0.2); }

/* figure frames */
.figure-frame {
  border: var(--rule);
  background: var(--sea-ink);
  box-shadow: var(--shadow);
  padding: 0.8rem;
}
.figure-frame svg { margin: 0 auto; }
.fig-label {
  font-family: var(--font-util);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-top: 0.6rem;
  text-align: center;
  color: var(--sea-deep);
}
.fig-note { font-family: var(--font-util); font-size: 0.8rem; color: var(--smoke); text-align: center; margin-top: 0.15rem; }

/* ============ Numbers / steps ============ */
.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li { counter-increment: step; position: relative; padding: 0 0 1.6rem 3.6rem; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 0.15rem;
  width: 2.4rem; height: 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sea);
  color: var(--paper);
  border: var(--rule);
  box-shadow: 3px 3px 0 var(--night);
  font-family: var(--font-display);
  font-size: 1.2rem;
}
.steps li::after {
  content: "";
  position: absolute;
  left: 1.17rem; top: 3.1rem; bottom: 0.6rem;
  border-left: 2px dashed rgba(17,21,28,0.45);
}
.steps li:last-child::after { display: none; }
.steps h3 { margin-bottom: 0.2em; }
.steps p:last-child { margin-bottom: 0; }

/* dark steps */
.section--dark .steps li::before { background: var(--gold); color: var(--night); box-shadow: 3px 3px 0 var(--night); }
.section--dark .steps li::after { border-left-color: rgba(234,242,249,0.5); }

/* ============ Points of sail ============ */
.sail-wrap {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 900px) { .sail-wrap { grid-template-columns: 1fr; } }

.point-list { list-style: none; margin: 0; padding: 0; }
.point-list li { padding: 0.75rem 0.75rem 0.75rem 0; border-top: 1px solid rgba(17,21,28,0.4); }
.point-list li:first-child { border-top: none; padding-top: 0.2rem; }
.point-list strong { font-family: var(--font-util); text-transform: uppercase; letter-spacing: 0.04em; color: var(--sea-deep); display: block; font-size: 0.95rem; }
.point-list span { display: block; margin-top: 0.1rem; }

/* warning blocks */
.warn {
  border: 3px solid var(--brick);
  background: #f6e2d9;
  padding: 1rem 1.1rem;
  margin: 1.4rem 0;
  font-family: var(--font-util);
  font-size: 0.95rem;
}
.warn strong { display: block; color: var(--brick); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 0.3rem; }
.warn p { margin: 0; }

.warn--night {
  background: var(--night);
  border-color: #e8b5a9;
  color: #f6e6dd;
}
.warn--night strong { color: var(--gold); }

.tip {
  border-left: 6px solid var(--gold);
  background: var(--paper-light);
  padding: 0.8rem 1rem;
  margin: 1.2rem 0;
  font-family: var(--font-util);
  font-size: 0.92rem;
}
.tip strong { color: var(--sea-deep); }
.tip p { display: inline; }

/* callout panel in dark section */
.callout {
  background: var(--sea-deep);
  border: var(--rule);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.3rem;
  margin-top: 1.6rem;
  font-family: var(--font-util);
  font-size: 0.95rem;
}
.callout strong { color: var(--gold); text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: 0.35rem; }
.callout p { margin: 0; color: var(--sea-ink); }

/* glossary */
.gloss { columns: 2; gap: 2.5rem; }
@media (max-width: 720px) { .gloss { columns: 1; } }

dl.gloss dt {
  font-family: var(--font-util);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.95rem;
  color: var(--sea-deep);
  break-inside: avoid;
  margin-top: 0.9rem;
}
dl.gloss dd { margin: 0.1rem 0 0; font-size: 1rem; }

/* footer */
.site-footer {
  background: var(--night);
  color: #cfd8e3;
  font-family: var(--font-util);
  font-size: 0.85rem;
  padding: 1.6rem 1.25rem;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  justify-content: space-between;
  align-items: baseline;
}
.site-footer a { color: var(--gold); }
.site-footer a:hover { color: var(--paper); }
.site-footer p { margin: 0; }

/* back-to-top */
.to-top {
  display: inline-block;
  background: var(--paper);
  color: var(--night);
  border: var(--rule);
  padding: 0.45rem 0.8rem;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.8rem;
}
.to-top:hover, .to-top:focus-visible { background: var(--gold); transform: translate(2px,2px); }
.to-top:active { transform: none; }

/* ============ Motion ============ */
.rise {
  animation: rise 0.7s ease both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .rise { transform: none !important; }
}

/* ============ Print ============ */
@media print {
  body { background: #fff; color: #000; }
  .site-header nav, .to-top, .skip-link { display: none; }
  .section, .hero { border: none; }
  .hero { background: #fff !important; color: #000 !important; }
  .hero p.lede { color: #000; }
  .figure-frame { box-shadow: none; }
  a { color: #000; text-decoration: underline; }
}

/* ============ Small screens ============ */
@media (max-width: 560px) {
  .hero-cta { width: 100%; text-align: center; }
  .steps li { padding-left: 0; padding-top: 3.4rem; }
  .steps li::before { top: 0.1rem; }
  .steps li::after { display: none; }
}