/* Dandelion Tides v0.2 — edit the color variables to change the theme */
:root{--bg:#f6f5ef;--ink:#253a33;--muted:#6c7871;--accent:#59836a;--edge:#dce2d9;--card:#fffefa;--soft:#e7eee4}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}body.dark{--bg:#17231e;--ink:#e9efe9;--muted:#a5b3a9;--accent:#b0d9b6;--edge:#42574a;--card:#223129;--soft:#2a4134}
a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.wrap{width:min(1080px,calc(100% - 40px));margin:auto}.top{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--edge)}.brand{font:700 22px Georgia,serif;letter-spacing:-.03em}.brand span{color:var(--accent)}nav{display:flex;gap:23px;align-items:center;font-size:14px}nav a:hover,.under:hover{color:var(--accent)}button{cursor:pointer;font:inherit}.theme{background:transparent;color:var(--ink);border:1px solid var(--edge);border-radius:100px;padding:5px 12px;font-size:13px}
.eyebrow{font-size:12px;letter-spacing:.2em;text-transform:uppercase;font-weight:700;color:var(--accent)}.hero{position:relative;min-height:570px;display:flex;align-items:center;overflow:hidden;isolation:isolate}.hero:before{content:"";position:absolute;z-index:-1;width:min(440px,45vw);aspect-ratio:1;right:1%;top:11%;border-radius:50%;background:radial-gradient(circle at 40% 35%,#fffef0 0 5%,transparent 6%),radial-gradient(circle at 50% 50%,#eef3e5 0 30%,#d5e2d1 31% 54%,#eaf0e5 55% 75%);box-shadow:0 25px 80px #60866e26;opacity:.85}body.dark .hero:before{opacity:.15}
h1,h2{font-family:Georgia,"Songti SC",serif;font-weight:500;letter-spacing:-.035em}h1{font-size:clamp(55px,8vw,100px);line-height:1.08;margin:22px 0}h1 em{font-weight:400;color:var(--accent)}.lead{font-size:18px;color:var(--muted);max-width:570px;margin:0}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:24px;margin-top:35px}.button{display:inline-block;border:0;background:var(--ink);color:var(--bg);padding:12px 23px;border-radius:999px;font-size:14px}.button:hover{background:var(--accent);color:var(--bg)}.under{font-weight:600;font-size:14px}
.section{border-top:1px solid var(--edge);padding:76px 0}.section h2{font-size:clamp(34px,4vw,46px);line-height:1.2;margin:9px 0 22px}.desc{color:var(--muted);max-width:770px;font-size:17px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:30px}.card{border:1px solid var(--edge);background:var(--card);padding:26px;border-radius:16px;min-height:185px}.card h3{margin:15px 0 7px;font-size:20px}.card p{margin:0;color:var(--muted);font-size:14px}.num{font:14px Georgia,serif;color:var(--accent)}.feature{display:grid;grid-template-columns:1.3fr .7fr;gap:22px;align-items:center;background:var(--soft);padding:36px;border-radius:20px}.feature p{color:var(--muted)}.feature .orb{width:min(180px,100%);aspect-ratio:1;border:1px solid var(--accent);border-radius:50%;margin:auto;display:grid;place-items:center;font-size:65px;font-family:Georgia,serif;color:var(--accent)}
footer{border-top:1px solid var(--edge);min-height:105px;display:flex;justify-content:space-between;align-items:center;gap:15px;color:var(--muted);font-size:13px}
.lab-hero{padding:75px 0 35px}.lab-hero h1{font-size:clamp(50px,7vw,80px)}.lab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:75px}.lab-card{padding:28px;border-radius:17px;background:var(--card);border:1px solid var(--edge)}.lab-card h2{font-size:27px;margin:9px 0}.lab-card p{color:var(--muted)}.output{min-height:145px;display:flex;flex-direction:column;justify-content:center;border:1px dashed var(--edge);padding:20px;border-radius:12px;margin:20px 0}.output-main{font:25px/1.6 Georgia,"Songti SC",serif;color:var(--ink)!important;margin:0}.output-sub{font-size:12px;margin:9px 0 0}.wide{grid-column:1/-1}pre{white-space:pre-wrap;word-break:break-word;overflow:auto;background:var(--soft);border-radius:12px;padding:18px;font-size:13px}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.hint{font-size:13px}.lab-card button{border:0;border-radius:100px;background:var(--ink);color:var(--bg);padding:10px 19px}.lab-card button:disabled{opacity:.6;cursor:wait}
@media(max-width:700px){.top{flex-wrap:wrap;padding:15px 0}.brand{font-size:20px}nav{gap:15px;font-size:12px}.hero{min-height:500px;padding:60px 0}.hero:before{width:240px;right:-115px;top:15%;opacity:.48}.lead{font-size:16px}.section{padding:60px 0}.cards,.lab-grid,.feature{grid-template-columns:1fr}.feature{padding:28px}.feature .orb{display:none}.lab-hero{padding:55px 0 30px}footer{flex-direction:column;align-items:flex-start;justify-content:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}


/* ==========================================================
   v0.3 · Gallery, responsive navigation and optional hero art
   ========================================================== */

/* Keep all navigation items reachable on small phones. */
.top nav { flex-wrap: wrap; row-gap: 10px; justify-content: flex-end; }
.top nav a[aria-current="page"] { color: var(--accent); font-weight: 700; }

/* Optional custom hero background, enabled in assets/site.js. */
.hero--photo {
  background-image:
    linear-gradient(90deg, rgba(12, 25, 29, .87), rgba(12, 25, 29, .38)),
    var(--hero-photo);
  background-size: cover;
  background-position: center center;
  border-radius: 22px;
  padding: 56px clamp(24px, 5vw, 66px);
  min-height: 570px;
  margin: 24px 0 36px;
}
.hero--photo::before { display: none; }
.hero--photo h1,
.hero--photo .lead { color: #fff; }
.hero--photo .eyebrow,
.hero--photo h1 em { color: #d5eacb; }
.hero--photo .button { color: #24352d; background: #fff; }
.hero--photo .under { color: #fff; }
.hero--photo .button:hover { background: #d5eacb; }

/* The gallery preview at the bottom of the homepage. */
.gallery-teaser {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(24px, 5vw, 65px);
}
.gallery-teaser__image {
  display: block;
  position: relative;
  background: var(--soft);
  border: 1px solid var(--edge);
  overflow: hidden;
  border-radius: 16px;
}
.gallery-teaser__image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  transition: transform .28s ease;
}
.gallery-teaser__image:hover img { transform: scale(1.025); }
.gallery-teaser__badge {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(16, 27, 28, .87);
  color: white;
  font-size: 11px;
  letter-spacing: .06em;
}
.gallery-teaser__text .desc { font-size: 16px; margin-bottom: 25px; }
.gallery-teaser__text h2 { margin-bottom: 14px; }

/* Gallery page. */
.gallery-hero { padding: 74px 0 44px; }
.gallery-hero h1 { font-size: clamp(51px, 7.5vw, 88px); }
.gallery-hero h1 em { color: var(--accent); font-weight: 400; }
.gallery-hero .lead { max-width: 650px; }
.gallery-instruction { color: var(--muted); font-size: 13px; margin: 27px 0 0; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 23px;
}
.gallery-card {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 18px;
  overflow: hidden;
  min-width: 0;
}
.gallery-card--featured { grid-column: 1 / -1; }
.gallery-trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  cursor: zoom-in;
  background: var(--soft);
  overflow: hidden;
}
.gallery-trigger img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  transition: transform .25s ease;
}
.gallery-trigger:hover img { transform: scale(1.015); }
.gallery-zoom {
  position: absolute;
  bottom: 20px;
  right: 20px;
  border-radius: 999px;
  padding: 9px 13px;
  font-size: 13px;
  color: #fff;
  background: rgba(12, 26, 28, .85);
}
.gallery-caption {
  padding: 23px 26px 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.gallery-kicker { font-size: 11px; letter-spacing: .16em; color: var(--accent); }
.gallery-caption h2 { margin: 5px 0; font-size: 22px; font-weight: 600; }
.gallery-caption p { margin: 0; font-size: 14px; color: var(--muted); }
.gallery-count { font: 28px Georgia, serif; color: var(--accent); opacity: .65; }
.gallery-ending {
  text-align: center;
  padding: 84px 15px 94px;
  color: var(--muted);
}
.gallery-ending__symbol { display: block; font-size: 35px; color: var(--accent); }
.gallery-ending p { font: 26px Georgia, serif; color: var(--ink); margin: 12px 0 4px; }
.gallery-ending span:last-child { font-size: 13px; }

/* Lightbox: native dialog = keyboard focus management and built-in Escape. */
body.modal-open { overflow: hidden; }
.lightbox {
  position: fixed;
  inset: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  overflow: hidden;
  color: #f5f7f4;
  border: 0;
  background: #0b1417f5;
}
.lightbox::backdrop { background: rgba(7, 15, 18, .88); }
.lightbox__body {
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.lightbox__top {
  flex-shrink: 0;
  min-height: 72px;
  padding: max(13px, env(safe-area-inset-top)) clamp(15px, 4vw, 40px) 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.lightbox__counter {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .08em;
  color: #d4e0db;
}
.lightbox__close {
  min-width: 86px;
  min-height: 44px;
  border: 1px solid #72837d;
  border-radius: 999px;
  padding: 7px 15px;
  color: #fff;
  background: #263732;
  font-size: 14px;
}
.lightbox__close:hover,
.lightbox__close:focus-visible { background: #3b5949; }
.lightbox__stage {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px clamp(12px, 6vw, 80px);
}
.lightbox__stage img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}
.lightbox__arrow {
  position: absolute;
  z-index: 2;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid #7c9185;
  border-radius: 50%;
  background: rgba(27, 44, 39, .87);
  color: #fff;
  font-size: 37px;
  line-height: 1;
}
.lightbox__arrow--prev { left: 16px; }
.lightbox__arrow--next { right: 16px; }
.lightbox__arrow:disabled { display: none; }
.lightbox__bottom {
  flex-shrink: 0;
  padding: 13px 22px max(24px, env(safe-area-inset-bottom));
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 13px;
  font-size: 13px;
  color: #d2dfd6;
  text-align: center;
}
.lightbox__bottom strong { font-size: 15px; color: #fff; font-weight: 600; }

/* Accessible, touch-friendly small screens. */
@media (max-width: 720px) {
  .top { align-items: flex-start; }
  .top nav { justify-content: flex-start; gap: 11px 16px; }
  .gallery-teaser { grid-template-columns: 1fr; }
  .gallery-hero { padding: 54px 0 28px; }
  .gallery-instruction { line-height: 1.7; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-card--featured { grid-column: auto; }
  .gallery-caption { padding: 19px 18px 22px; }
  .gallery-caption h2 { font-size: 19px; }
  .gallery-zoom { bottom: 11px; right: 11px; padding: 6px 10px; font-size: 12px; }
  .gallery-ending { padding: 60px 15px 70px; }
  .hero--photo {
    min-height: 495px;
    padding: 55px 22px;
    margin: 16px 0 24px;
    background-position: center center;
  }
  .lightbox__top { min-height: 66px; }
  .lightbox__stage { padding: 8px 6px; }
  .lightbox__arrow { width: 44px; height: 44px; font-size: 30px; }
  .lightbox__arrow--prev { left: 7px; }
  .lightbox__arrow--next { right: 7px; }
  .lightbox__bottom {
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 10px 18px max(23px, env(safe-area-inset-bottom));
    font-size: 12px;
  }
}

@media (max-width: 390px) {
  .top nav { gap: 9px 12px; font-size: 12px; }
  .brand { font-size: 19px; }
  .theme { padding: 5px 10px; }
  .gallery-hero h1 { font-size: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  .gallery-trigger img,
  .gallery-teaser__image img { transition: none; }
}

/* v0.3: prevent long API/JSON text from widening ultra-narrow phones. */
.lab-card { min-width: 0; }
.lab-card .output-sub,
.lab-card pre,
.lab-card .hint { overflow-wrap: anywhere; }
@media (max-width: 720px) {
  .lab-grid { grid-template-columns: minmax(0, 1fr); }
}