/* Seawardnotes — coastal walking preparation journal.
   Tokens live in :root so brand/colour variants only swap this block. */
:root {
  --sand: #f3ecdc;
  --sand-deep: #e6dac0;
  --bone: #fbf8f1;
  --ocean: #0f4c6e;
  --ocean-deep: #0b2f44;
  --ocean-mist: #d4e3eb;
  --tide: #226a8c;
  --ink: #1b2229;
  --ink-soft: #4a545d;
  --line: #cfc3a8;
  --on-ocean: #f4f1e8;
  --on-ocean-soft: #c9d9e2;
  --rule-on-ocean: rgba(244, 241, 232, 0.3);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --measure: 60ch;
  --wrap: 1140px;
  --gutter: clamp(20px, 5vw, 48px);
  --seam: clamp(72px, 10vw, 136px);
  --focus: 3px solid var(--tide);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--sand);
}
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.05; margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1em; max-width: var(--measure); }
a { color: var(--ocean); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--tide); }
:focus-visible { outline: var(--focus); outline-offset: 3px; border-radius: 2px; }
button { font: inherit; color: inherit; cursor: pointer; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 1rem;
}
.skip {
  position: absolute; left: var(--gutter); top: -4rem; z-index: 20;
  background: var(--ocean-deep); color: var(--on-ocean);
  padding: 0.6rem 1rem; font-family: var(--sans);
}
.skip:focus { top: 0.5rem; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 10;
  background: var(--sand);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 1rem;
}
.brand { font-family: var(--serif); font-size: 1.35rem; text-decoration: none; color: var(--ink); }
.brand span { color: var(--tide); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  padding: 0.45rem 0.9rem; font-family: var(--sans); font-size: 0.9rem; border-radius: 2px;
}
#site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: clamp(0.8rem, 2vw, 1.6rem); }
#site-nav a {
  font-family: var(--sans); font-size: 0.9rem; text-decoration: none; color: var(--ink-soft); padding: 0.3rem 0;
}
#site-nav a:hover { color: var(--ocean); box-shadow: 0 1px 0 var(--tide); }

/* ---------- section bands ---------- */
section { padding-block: var(--seam); scroll-margin-top: 64px; }
[role="tabpanel"] { scroll-margin-top: 88px; }
.band-mist { background: var(--ocean-mist); }
.band-bone { background: var(--bone); }
.band-ocean { background: var(--ocean-deep); color: var(--on-ocean); }
.band-ocean a { color: var(--on-ocean); }
.band-ocean .eyebrow { color: var(--on-ocean-soft); }
.section-head { border-top: 1px solid var(--line); padding-top: 1.25rem; margin-bottom: 2.5rem; }
.band-ocean .section-head { border-color: var(--rule-on-ocean); }
.section-head h2 { font-size: clamp(2rem, 4vw, 3rem); max-width: 18ch; }
.section-head .lede { margin-top: 1rem; color: var(--ink-soft); font-size: 1.1rem; }
.band-ocean .lede { color: var(--on-ocean-soft); }

/* ---------- hero ---------- */
.hero { padding-block: clamp(40px, 7vw, 88px); }
.hero .wrap {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 6vw, 5rem); align-items: center;
}
.hero h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); max-width: 14ch; }
.hero h1 em { color: var(--ocean); }
.hero .lede {
  margin-top: 1.4rem; font-size: clamp(1.1rem, 1.6vw, 1.3rem); color: var(--ink-soft); max-width: 46ch;
}
.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.btn {
  display: inline-block; font-family: var(--sans); font-size: 0.95rem; text-decoration: none;
  padding: 0.7rem 1.2rem; border: 1px solid var(--ocean); color: var(--ocean); border-radius: 2px;
  transition: background-color 150ms, color 150ms;
}
.btn-solid { background: var(--ocean); color: var(--on-ocean); }
.btn:hover { background: var(--ocean-deep); color: var(--on-ocean); border-color: var(--ocean-deep); }
.tide-figure { margin: 0; }
.tide-figure svg { width: 100%; height: auto; display: block; }
.tide-figure figcaption { font-family: var(--sans); font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.75rem; }

/* ---------- contents rail ---------- */
.contents ol { list-style: none; margin: 0; padding: 0; counter-reset: entry; }
.contents li {
  counter-increment: entry; border-top: 1px solid var(--line); padding: 1.1rem 0;
  display: grid; grid-template-columns: 3rem 1fr auto; gap: 1rem; align-items: baseline;
}
.contents li:last-child { border-bottom: 1px solid var(--line); }
.contents li::before {
  content: counter(entry, decimal-leading-zero); font-family: var(--mono); font-size: 0.85rem; color: var(--tide);
}
.contents a { font-size: 1.3rem; text-decoration: none; }
.contents a:hover { text-decoration: underline; }
.contents small {
  display: block; font-family: var(--sans); font-size: 0.9rem; color: var(--ink-soft); margin-top: 0.2rem;
}
.contents .mins { font-family: var(--sans); font-size: 0.8rem; color: var(--ink-soft); white-space: nowrap; }

/* ---------- guides / tabs ---------- */
.guides-layout {
  display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: start;
}
[role="tablist"] { display: flex; flex-direction: column; gap: 0.25rem; position: sticky; top: 84px; }
[role="tab"] {
  text-align: left; background: none; border: 0; border-left: 2px solid var(--line);
  padding: 0.7rem 1rem; font-family: var(--sans); font-size: 0.95rem; color: var(--ink-soft);
  transition: border-color 150ms, color 150ms;
}
[role="tab"] b { display: block; font-family: var(--serif); font-weight: 400; font-size: 1.25rem; color: var(--ink); }
[role="tab"]:hover { border-color: var(--tide); }
[role="tab"][aria-selected="true"] { border-color: var(--ocean); color: var(--ocean); }
[role="tab"][aria-selected="true"] b { color: var(--ocean); }
[role="tabpanel"] h3 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-bottom: 1.2rem; }
[role="tabpanel"] p:first-of-type::first-letter {
  font-size: 3em; float: left; line-height: 0.85; padding: 0.08em 0.1em 0 0; color: var(--ocean);
}
.aside-note {
  border-left: 2px solid var(--tide); padding: 0.2rem 0 0.2rem 1rem;
  font-family: var(--sans); font-size: 0.95rem; color: var(--ink-soft); max-width: var(--measure);
}
.twelfths {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 4px; margin: 1.5rem 0; max-width: 32rem;
  font-family: var(--sans); font-size: 0.8rem; text-align: center;
}
.twelfths span { background: var(--ocean-mist); padding: 0.4rem 0; border-radius: 2px; color: var(--ocean-deep); }
.twelfths span:nth-child(3), .twelfths span:nth-child(4) { background: var(--tide); color: var(--on-ocean); }

/* ---------- planner ---------- */
.planner-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: start;
}
.planner label { display: block; font-family: var(--sans); font-size: 0.9rem; margin-bottom: 0.5rem; }
.planner input[type="time"] {
  font: inherit; font-family: var(--mono); font-size: 1.4rem; padding: 0.5rem 0.75rem;
  border: 1px solid var(--line); border-radius: 2px; background: var(--bone); color: var(--ink);
  width: 100%; max-width: 16rem;
}
.planner output { display: block; margin-top: 1.5rem; }
.planner dl {
  display: grid; grid-template-columns: auto 1fr; gap: 0.5rem 1.25rem; margin: 0;
  font-family: var(--sans); font-size: 0.95rem;
}
.planner dt { color: var(--ink-soft); }
.planner dd { margin: 0; font-family: var(--mono); font-size: 1.05rem; }
.planner .empty { color: var(--ink-soft); font-family: var(--sans); font-size: 0.95rem; }

/* ---------- checklist ---------- */
.pack-status {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; font-family: var(--sans);
}
.meter { flex: 1 1 200px; height: 6px; background: var(--sand-deep); border-radius: 3px; overflow: hidden; }
.meter span { display: block; height: 100%; width: 0; background: var(--tide); transition: width 200ms; }
.btn-ghost {
  background: none; border: 1px solid var(--line); padding: 0.45rem 0.9rem;
  font-family: var(--sans); font-size: 0.85rem; border-radius: 2px;
}
.btn-ghost:hover { border-color: var(--ocean); color: var(--ocean); }
.pack-groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 4rem; }
fieldset { border: 0; padding: 1rem 0 0; margin: 0; border-top: 1px solid var(--line); }
legend { font-family: var(--serif); font-size: 1.35rem; padding: 0; float: left; width: 100%; margin-bottom: 0.6rem; }
legend + * { clear: both; }
.pack-groups label {
  display: grid; grid-template-columns: 1.25rem 1fr; gap: 0.75rem; align-items: start;
  padding: 0.35rem 0; cursor: pointer;
}
.pack-groups input {
  appearance: none; width: 1.15rem; height: 1.15rem; margin: 0.2rem 0 0;
  border: 1.5px solid var(--ink-soft); border-radius: 2px; background: var(--bone);
  display: grid; place-content: center;
}
.pack-groups input::before {
  content: ""; width: 0.55rem; height: 0.55rem; background: var(--tide);
  transform: scale(0); transition: transform 120ms;
}
.pack-groups input:checked { border-color: var(--tide); }
.pack-groups input:checked::before { transform: scale(1); }
.pack-groups input:checked + span {
  color: var(--ink-soft); text-decoration: line-through; text-decoration-color: var(--line);
}
.pack-groups small { display: block; font-family: var(--sans); font-size: 0.8rem; color: var(--ink-soft); }

/* ---------- six questions ---------- */
.questions {
  list-style: none; margin: 0; padding: 0; counter-reset: q;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem 3rem;
}
.questions li {
  counter-increment: q; border-top: 1px solid var(--rule-on-ocean); padding-top: 1rem;
  font-size: 1.2rem; line-height: 1.35;
}
.questions li::before {
  content: counter(q); display: block; font-family: var(--mono); font-size: 0.8rem;
  color: var(--on-ocean-soft); margin-bottom: 0.6rem;
}

/* ---------- about / footer ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); }
.about-grid h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
.site-foot {
  border-top: 1px solid var(--line); padding-block: 2rem 3rem;
  font-family: var(--sans); font-size: 0.85rem; color: var(--ink-soft);
}
.site-foot .wrap {
  display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: baseline;
}
.site-foot ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 1rem; }
.site-foot a { color: var(--ink-soft); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero .wrap, .planner-grid, .about-grid { grid-template-columns: 1fr; }
  .guides-layout { grid-template-columns: 1fr; gap: 1.5rem; }
  [role="tablist"] {
    position: static; flex-direction: row; overflow-x: auto; gap: 0;
    border-bottom: 1px solid var(--line); scrollbar-width: none;
  }
  [role="tab"] {
    border-left: 0; border-bottom: 2px solid transparent; margin-bottom: -1px;
    white-space: nowrap; padding: 0.6rem 0.9rem; flex: 0 0 auto;
  }
  [role="tab"] b { font-size: 1.05rem; }
  [role="tab"][aria-selected="true"] { border-bottom-color: var(--ocean); }
  .questions { grid-template-columns: 1fr; gap: 1.25rem; }
}
@media (max-width: 640px) {
  body { font-size: 1.05rem; }
  .nav-toggle { display: inline-block; }
  #site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bone); border-bottom: 1px solid var(--line);
  }
  #site-nav[data-open="true"] { display: block; }
  #site-nav ul { flex-direction: column; gap: 0; padding: 0.5rem var(--gutter) 1rem; }
  #site-nav a { display: block; padding: 0.7rem 0; border-top: 1px solid var(--line); font-size: 1rem; }
  .contents li { grid-template-columns: 2.25rem 1fr; }
  .contents .mins { grid-column: 2; }
  .pack-groups { grid-template-columns: 1fr; gap: 1.5rem; }
  .twelfths { font-size: 0.7rem; }
  .hero h1 { font-size: 2.3rem; }
}

/* ---------- motion & print ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  .site-head, .actions, .nav-toggle, .btn-ghost, .planner-grid > :last-child { display: none; }
  section { padding-block: 1.5rem; break-inside: avoid; }
  [role="tabpanel"][hidden] { display: block !important; }
  [role="tablist"] { display: none; }
  .band-ocean { background: none; color: var(--ink); }
}