/* ============================================================
   The Low Tide Walk — Rialto Beach
   Direction: a naturalist's low-tide almanac. Lichen paper,
   spruce ink, one ochre mark (the sea star / the tide window).
   ============================================================ */

@font-face{
  font-family:"Fraunces";font-style:normal;font-weight:300 700;font-display:swap;
  src:url("fonts/fraunces.woff2") format("woff2-variations"),url("fonts/fraunces.woff2") format("woff2");
}
@font-face{
  font-family:"Fraunces";font-style:italic;font-weight:300 700;font-display:swap;
  src:url("fonts/fraunces-italic.woff2") format("woff2-variations"),url("fonts/fraunces-italic.woff2") format("woff2");
}
@font-face{
  font-family:"Archivo";font-style:normal;font-weight:400 600;font-display:swap;
  src:url("fonts/archivo.woff2") format("woff2-variations"),url("fonts/archivo.woff2") format("woff2");
}

:root{
  /* palette */
  --paper:#e9ece5;
  --paper-2:#f2f4ee;
  --tint:#dfe4da;
  --ink:#16211d;
  --ink-2:#4a5750;
  --rule:rgba(22,33,29,.15);
  --rule-2:rgba(22,33,29,.28);
  --deep:#12262a;
  --deep-2:#1b3437;
  --teal:#2c635f;
  --ochre:#b8551a;
  --ochre-lt:#e08a3c;
  --paper-on-deep:#dfe6e0;

  /* type */
  --display:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;

  /* spacing scale (8px base) */
  --s1:.5rem; --s2:1rem; --s3:1.5rem; --s4:2rem; --s5:3rem;
  --s6:4rem; --s7:6rem; --s8:8rem;
  --band:clamp(4rem,9vw,8.5rem);
  --gut:clamp(1.25rem,5vw,3rem);
  --maxw:76rem;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:clamp(1rem,.96rem + .2vw,1.0625rem);
  line-height:1.62;
  font-synthesis-weight:none;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3{font-family:var(--display);font-optical-sizing:auto;font-weight:500;margin:0;text-wrap:balance}
p{margin:0}
a{color:inherit}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}

.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.skip{
  position:absolute;left:var(--gut);top:-4rem;z-index:20;
  background:var(--ink);color:var(--paper);padding:.6rem 1rem;border-radius:2px;
  font:500 .8rem/1 var(--sans);transition:top .18s ease;
}
.skip:focus-visible{top:.75rem}

:where(a,button):focus-visible{
  outline:2px solid var(--ochre);outline-offset:3px;border-radius:2px;
}

/* ---------- eyebrows ---------- */
.eyebrow{
  font-family:var(--sans);font-size:.72rem;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--teal);
  margin:0 0 var(--s3);
}
.eyebrow--light{color:var(--ochre-lt)}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:10;
  background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule);
}
.nav__in{display:flex;align-items:center;justify-content:space-between;gap:var(--s3);height:66px}
.mark{display:flex;align-items:center;gap:.6rem;text-decoration:none}
.mark__star{width:22px;height:22px;fill:var(--ochre);flex:none;transition:transform .5s cubic-bezier(.22,1,.36,1)}
.mark:hover .mark__star{transform:rotate(72deg)}
.mark__txt{
  font-family:var(--display);font-size:1rem;font-weight:600;line-height:1;
  letter-spacing:-.01em;display:flex;flex-direction:column;gap:.22rem;
}
.mark__txt em{
  font-family:var(--sans);font-style:normal;font-size:.62rem;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);
}
.nav__links{display:flex;gap:clamp(1rem,2.6vw,2rem)}
.nav__links a{
  font-size:.85rem;text-decoration:none;color:var(--ink-2);
  padding-bottom:2px;border-bottom:1px solid transparent;transition:color .18s,border-color .18s;
}
.nav__links a:hover{color:var(--ink);border-bottom-color:var(--ochre)}
@media (max-width:640px){.nav__hide{display:none}}

/* ---------- buttons ---------- */
.cta-row{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:var(--s4)}
@media (max-width:480px){
  .cta-row{flex-direction:column;align-items:stretch}
  .btn{text-align:center}
}
.btn{
  display:inline-block;font-family:var(--sans);font-size:.9rem;font-weight:500;
  letter-spacing:.01em;text-decoration:none;padding:.85rem 1.5rem;border-radius:999px;
  background:var(--ink);color:var(--paper-2);border:1px solid var(--ink);
  transition:background .2s,color .2s,transform .2s,border-color .2s;
}
.btn:hover{background:var(--teal);border-color:var(--teal);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule-2)}
.btn--ghost:hover{background:transparent;color:var(--ochre);border-color:var(--ochre)}
.btn--light{background:var(--paper-2);color:var(--deep);border-color:var(--paper-2)}
.btn--light:hover{background:var(--ochre-lt);border-color:var(--ochre-lt);color:#2a1405}
.btn--ghostlight{background:transparent;color:var(--paper-on-deep);border-color:rgba(223,230,224,.35)}
.btn--ghostlight:hover{background:transparent;color:var(--ochre-lt);border-color:var(--ochre-lt)}

/* ---------- hero ---------- */
.hero{padding:clamp(3.5rem,8vw,7rem) 0 clamp(3rem,6vw,5rem);position:relative;overflow:hidden}
.hero::after{
  content:"";position:absolute;right:-14vw;top:-8vw;width:46vw;height:46vw;max-width:640px;max-height:640px;
  border-radius:50%;background:radial-gradient(circle at 40% 40%,rgba(44,99,95,.14),transparent 62%);
  pointer-events:none;
}
.hero__in{position:relative}
.hero__h{
  font-size:clamp(2.7rem,7.4vw,5.6rem);line-height:1.0;letter-spacing:-.025em;
  max-width:16ch;margin-bottom:var(--s4);
}
.hero__h em{font-style:italic;font-weight:400;color:var(--teal)}
.lede{
  font-size:clamp(1.06rem,.98rem + .5vw,1.3rem);line-height:1.55;
  max-width:52ch;color:var(--ink-2);
}
.facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s3);
  margin:clamp(3rem,6vw,4.5rem) 0 0;padding-top:var(--s3);border-top:1px solid var(--rule);
}
.facts dt{
  font-size:.68rem;font-weight:500;letter-spacing:.15em;text-transform:uppercase;
  color:var(--teal);margin-bottom:.35rem;
}
.facts dd{margin:0;font-family:var(--display);font-size:clamp(1rem,.9rem + .4vw,1.22rem);line-height:1.25;letter-spacing:-.01em}
@media (max-width:720px){
  .facts{grid-template-columns:repeat(2,1fr);gap:var(--s3) var(--s2)}
}

/* ---------- tide band (dark, the signature) ---------- */
.tideband{background:var(--deep);color:var(--paper-on-deep);padding:var(--band) 0}
.tideband__in{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(2rem,5vw,4.5rem);align-items:center}
.tideband__h{
  font-size:clamp(1.6rem,1.2rem + 1.5vw,2.35rem);line-height:1.14;letter-spacing:-.02em;
  color:#fff;margin-bottom:var(--s3);max-width:22ch;
}
.tideband__txt p{color:rgba(223,230,224,.78);max-width:46ch;font-size:1rem}
.curve{margin:0}
.curve svg{width:100%;height:auto;display:block;overflow:visible}
.curve__grid line{stroke:rgba(223,230,224,.12);stroke-width:1;stroke-dasharray:2 6}
.curve__dim,.curve__line{
  fill:none;stroke-linecap:round;
  stroke-dasharray:1500;stroke-dashoffset:1500;animation:draw 2.4s .15s cubic-bezier(.4,0,.2,1) forwards;
}
.curve__dim{stroke:rgba(224,138,60,.32);stroke-width:2}
.curve__line{stroke:var(--ochre-lt);stroke-width:3.4}
.curve__datum{stroke:rgba(223,230,224,.2);stroke-width:1}
.curve__win{fill:#e08a3c;opacity:.07}
@keyframes draw{to{stroke-dashoffset:0}}
.curve__dot{fill:var(--ochre-lt)}
.curve__tick{stroke:rgba(223,230,224,.4);stroke-width:1}
.curve__edge{stroke:rgba(223,230,224,.3);stroke-width:1;stroke-dasharray:3 4}
.curve__lab{
  font-family:var(--sans);font-size:13px;font-weight:500;letter-spacing:.13em;
  fill:rgba(223,230,224,.6);
}
.curve__lab--dim{font-size:11px;fill:rgba(223,230,224,.42);letter-spacing:.16em}
.curve__lab--o{fill:var(--ochre-lt);letter-spacing:.1em}
.curve figcaption{
  margin-top:var(--s3);font-size:.85rem;line-height:1.55;color:rgba(223,230,224,.6);
  border-top:1px solid rgba(223,230,224,.14);padding-top:var(--s2);max-width:52ch;
}
@media (prefers-reduced-motion:reduce){
  .curve__dim,.curve__line{animation:none;stroke-dashoffset:0}
}
@media (max-width:860px){
  .tideband__in{grid-template-columns:1fr;gap:var(--s5)}
  .tideband__h{max-width:none}
}
@media (max-width:620px){
  .curve__lab{font-size:22px;letter-spacing:.1em}
  .curve__lab--dim{font-size:19px}
  .curve__dim{stroke-width:3}
  .curve__line{stroke-width:5}
  .curve__dot{r:7px}
}

/* ---------- generic section ---------- */
.sec{padding:var(--band) 0}
.sec--tint{background:var(--tint)}
.sec__head{max-width:46rem;margin-bottom:clamp(2.5rem,5vw,4rem)}
.sec__h{font-size:clamp(2rem,1.5rem + 2.2vw,3.1rem);line-height:1.05;letter-spacing:-.025em;margin-bottom:var(--s3)}
.sec__lede{color:var(--ink-2);max-width:58ch;font-size:clamp(1rem,.97rem + .25vw,1.12rem)}

/* ---------- tide table ---------- */
.tide{width:100%;border-collapse:collapse;font-size:.95rem}
.tide thead th{
  font-family:var(--sans);font-size:.68rem;font-weight:500;letter-spacing:.15em;text-transform:uppercase;
  color:var(--teal);text-align:left;padding:0 var(--s2) .75rem 0;border-bottom:1px solid var(--rule-2);
}
.tide tbody th,.tide td{padding:1.15rem var(--s2) 1.15rem 0;border-bottom:1px solid var(--rule);vertical-align:baseline}
.tide tbody th{
  font-family:var(--display);font-weight:600;font-size:1.18rem;letter-spacing:-.01em;
  text-align:left;white-space:nowrap;width:1%;
}
.tide .num{font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--ink-2);width:1%}
.tide td:last-child{color:var(--ink-2);padding-right:0;min-width:14rem}
.tide tbody tr{transition:background .18s}
.tide tbody tr:hover{background:rgba(255,255,255,.45)}
.tide__best th,.tide__best .num{color:var(--ink)}
.tide__best{box-shadow:inset 3px 0 0 var(--ochre)}
.tide__best > th{padding-left:.9rem}
.tide__off{color:var(--ink-2);opacity:.62}
.tide__off th{font-style:italic;font-weight:400}
.pill{
  display:inline-block;font-size:.64rem;font-weight:500;letter-spacing:.13em;text-transform:uppercase;
  color:#fff;background:var(--ochre);padding:.28rem .55rem;border-radius:2px;margin-right:.5rem;
  vertical-align:1px;
}
.note{
  margin-top:var(--s4);font-size:.88rem;line-height:1.6;color:var(--ink-2);max-width:60ch;
  padding-left:var(--s2);border-left:2px solid var(--rule-2);
}
@media (max-width:760px){
  .tide,.tide tbody,.tide tr,.tide tbody th,.tide td{display:block;width:auto}
  .tide thead{display:none}
  .tide tbody tr{
    border-bottom:1px solid var(--rule);padding:1.1rem 0 1.2rem;position:relative;
  }
  .tide tbody th,.tide td{border:0;padding:0}
  .tide tbody th{font-size:1.35rem;margin-bottom:.35rem}
  .tide .num{
    display:inline-block;width:auto;vertical-align:top;
    font-size:.88rem;margin:0 1.6rem .1rem 0;
  }
  .tide .num::before{
    content:attr(data-l);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;
    color:var(--teal);display:block;margin-bottom:.1rem;
  }
  .tide td:last-child{margin-top:.7rem;min-width:0;font-size:.92rem}
  .tide__best{box-shadow:none;border-left:3px solid var(--ochre);padding-left:.9rem}
  .tide__best > th{padding-left:0}
}

/* ---------- specimen plates ---------- */
.plates{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(1.5rem,3vw,2.5rem)}
.plate{border-top:1px solid var(--rule-2);padding-top:var(--s3)}
.plate__art{
  background:var(--paper-2);border-radius:2px;aspect-ratio:1/1;display:grid;place-items:center;
  margin-bottom:var(--s3);padding:12%;transition:background .25s;
}
.plate:hover .plate__art{background:#fff}
.plate__art svg{width:100%;height:100%;display:block}
.plate .ln{fill:none;stroke:var(--ink);stroke-width:2.2;stroke-linejoin:round;stroke-linecap:round}
.plate .ln--thin{stroke-width:1.5}
.plate .ln--hair{stroke-width:1.1;opacity:.42}
.plate .vr circle{fill:var(--ink);opacity:.18}
.plate .ln--plate{stroke-width:1.2;opacity:.6}
.plate .dt{fill:var(--ochre);r:1.9}
.plate .dt--c{r:4.5}
.plate .fl{fill:var(--ink)}
.plate__h{font-size:1.3rem;line-height:1.15;letter-spacing:-.015em;margin-bottom:.2rem}
@media (min-width:561px){.plate__h{min-height:2.3em}}
.plate__sci{
  font-family:var(--display);font-style:italic;font-size:.9rem;color:var(--teal);margin-bottom:var(--s2);
}
.plate p:last-child{font-size:.92rem;line-height:1.6;color:var(--ink-2)}
@media (max-width:980px){.plates{grid-template-columns:repeat(2,1fr);gap:var(--s5) var(--s4)}}
@media (max-width:560px){
  .plates{grid-template-columns:1fr;gap:var(--s4)}
  .plate{display:grid;grid-template-columns:82px 1fr;gap:0 var(--s3);align-items:start}
  .plate__art{grid-row:1/span 3;margin-bottom:0;padding:8%}
  .plate__h{grid-column:2;grid-row:1;margin-top:-.2rem}
  .plate__sci{grid-column:2;grid-row:2}
  .plate p:last-child{grid-column:2;grid-row:3}
}

/* ---------- what to bring ---------- */
.two{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:clamp(2rem,5vw,4.5rem);align-items:start}
.list{list-style:none;margin:var(--s4) 0 0;padding:0;counter-reset:none}
.list li{
  display:grid;grid-template-columns:3.2rem 1fr;gap:var(--s2);
  padding:var(--s3) 0;border-top:1px solid var(--rule);
}
.list li:last-child{border-bottom:1px solid var(--rule)}
.list__n{
  font-family:var(--sans);font-size:.72rem;font-weight:500;letter-spacing:.1em;
  color:var(--ochre);padding-top:.42rem;font-variant-numeric:tabular-nums;
}
.list h3{font-family:var(--display);font-size:1.16rem;font-weight:600;line-height:1.25;letter-spacing:-.012em;margin-bottom:.3rem}
.list p{font-size:.94rem;line-height:1.6;color:var(--ink-2);max-width:56ch}
@media (max-width:900px){.two{grid-template-columns:1fr}}
@media (max-width:460px){.list li{grid-template-columns:2.4rem 1fr;gap:.6rem}}

.card{
  background:var(--paper-2);border:1px solid var(--rule);border-radius:3px;
  padding:clamp(1.5rem,3vw,2.25rem);position:sticky;top:96px;
}
.card__h{
  font-family:var(--sans);font-size:.7rem;font-weight:500;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal);margin-bottom:var(--s2);
}
.card__list{list-style:none;margin:0 0 var(--s1);padding:0}
.card__list li{
  font-family:var(--display);font-size:1.02rem;line-height:1.35;letter-spacing:-.01em;
  padding:.6rem 0 .6rem 1.1rem;border-bottom:1px solid var(--rule);position:relative;
}
.card__list li:last-child{border-bottom:0}
.card__list li::before{
  content:"";position:absolute;left:0;top:1.05rem;width:5px;height:5px;border-radius:50%;background:var(--ochre);
}
.card hr{border:0;border-top:1px solid var(--rule-2);margin:var(--s3) 0}
.card p{font-size:.92rem;line-height:1.6;color:var(--ink-2)}
.card p + p{margin-top:.8rem}
.card__foot{margin-top:var(--s3)!important;padding-top:var(--s2);border-top:1px solid var(--rule);font-size:.86rem!important}
@media (max-width:900px){.card{position:static;margin-top:var(--s4)}}

/* ---------- end band ---------- */
.end{background:var(--deep);color:var(--paper-on-deep);padding:var(--band) 0;position:relative;overflow:hidden}
.end::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 90% at 15% 120%,rgba(44,99,95,.45),transparent 60%);
  pointer-events:none;
}
.end__in{position:relative;max-width:52rem}
.end__h{
  font-size:clamp(1.75rem,1.3rem + 2.1vw,3rem);line-height:1.08;letter-spacing:-.025em;color:#fff;
  margin-bottom:var(--s3);
}
.end__p{color:rgba(223,230,224,.78);max-width:48ch}

/* ---------- footer ---------- */
.foot{background:var(--deep-2);color:rgba(223,230,224,.72);padding:clamp(3rem,6vw,4.5rem) 0 clamp(2rem,4vw,3rem)}
.foot__in{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:var(--s4) var(--s5)}
.foot__star{width:26px;height:26px;fill:var(--ochre-lt);margin-bottom:var(--s2)}
.foot__wm{
  font-family:var(--display);font-size:clamp(1.6rem,1.2rem + 1.4vw,2.1rem);font-weight:500;
  letter-spacing:-.025em;line-height:1;color:#fff;margin-bottom:.6rem;
}
.foot__sub{font-size:.88rem;line-height:1.55;max-width:34ch}
.foot__nav{display:flex;flex-direction:column;gap:.7rem;align-items:flex-start;justify-self:end;text-align:left}
.foot__nav a{
  font-size:.9rem;text-decoration:none;color:rgba(223,230,224,.72);
  border-bottom:1px solid transparent;transition:color .18s,border-color .18s;
}
.foot__nav a:hover{color:var(--ochre-lt);border-bottom-color:var(--ochre-lt)}
.foot__fine{
  grid-column:1/-1;border-top:1px solid rgba(223,230,224,.14);padding-top:var(--s3);
  font-size:.78rem;line-height:1.6;color:rgba(223,230,224,.5);max-width:70ch;
}
@media (max-width:700px){
  .foot__in{grid-template-columns:1fr;gap:var(--s4)}
  .foot__nav{justify-self:start}
}

/* ---------- 404 ---------- */
.oops{min-height:72vh;display:grid;place-items:center;text-align:center;padding:var(--band) 0}
.oops h1{font-size:clamp(2.4rem,2rem + 3vw,4.2rem);line-height:1.02;letter-spacing:-.03em;margin-bottom:var(--s3)}
.oops p{color:var(--ink-2);max-width:44ch;margin-inline:auto}