:root{
  --bg:#f8fbff;
  --bg-soft:#eef6ff;
  --surface:rgba(255,255,255,.72);
  --surface-strong:rgba(255,255,255,.84);
  --line:rgba(120,154,190,.22);
  --line-strong:rgba(72,116,170,.34);
  --text:#10223a;
  --muted:#5a6f88;
  --brand:#4b88ff;
  --brand-soft:#c9ddff;
  --accent:#7cd6ff;
  --shadow:0 18px 60px rgba(47,88,145,.12);
  --shadow-soft:0 8px 30px rgba(47,88,145,.10);
  --radius:24px;
  --max:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, "Noto Sans Thai", system-ui, sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(111,190,255,.16), transparent 30%),
    radial-gradient(circle at 85% 0%, rgba(93,148,255,.12), transparent 28%),
    linear-gradient(180deg,#fbfdff 0%, #f2f7ff 40%, #f8fbff 100%);
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea{font:inherit}
.container{width:min(calc(100% - 2rem), var(--max));margin-inline:auto}
.site-header{
  position:sticky;top:0;z-index:30;
  backdrop-filter:blur(22px);
  background:rgba(248,251,255,.78);
  border-bottom:1px solid rgba(153,179,212,.18);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:78px}
.brand{display:flex;align-items:center;gap:.9rem}
.brand img{width:42px;height:42px}
.brand-wordmark{font-weight:800;letter-spacing:.02em}
.brand-tag{font-size:.8rem;color:var(--muted)}
.nav{display:flex;gap:.55rem;flex-wrap:wrap;align-items:center}
.nav a{
  padding:.65rem .92rem;border-radius:999px;
  color:var(--muted);font-size:.96rem;transition:.22s ease;
}
.nav a:hover,.nav a.active{
  color:var(--text);background:rgba(255,255,255,.72);
  box-shadow:var(--shadow-soft);
}
.mobile-toggle{
  display:none;border:1px solid var(--line);background:rgba(255,255,255,.7);
  border-radius:16px;padding:.65rem .75rem;box-shadow:var(--shadow-soft)
}
.hero{padding:5.6rem 0 4rem}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;padding:.5rem .85rem;border-radius:999px;
  background:rgba(255,255,255,.68);border:1px solid var(--line);color:var(--muted);
  box-shadow:var(--shadow-soft);font-size:.86rem
}
.hero h1{
  font-size:clamp(2.25rem, 6vw, 5.4rem);line-height:1.02;margin:.9rem 0 1rem;
  letter-spacing:-.04em;max-width:14ch;
}
.hero p{
  max-width:62ch;font-size:1.1rem;line-height:1.8;color:var(--muted);margin:0 0 1.6rem;
}
.hero-grid{
  display:grid;grid-template-columns:1.18fr .82fr;gap:1.25rem;align-items:start
}
.glass{
  background:var(--surface);border:1px solid var(--line);backdrop-filter:blur(18px);
  box-shadow:var(--shadow);border-radius:var(--radius)
}
.panel{padding:1.35rem}
.statement{font-size:1.05rem;line-height:1.85;color:var(--text)}
.kicker{font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.actions{display:flex;gap:.85rem;flex-wrap:wrap;margin-top:1.4rem}
.btn{
  display:inline-flex;align-items:center;gap:.65rem;padding:.95rem 1.2rem;
  border-radius:999px;border:1px solid transparent;font-weight:700;
  transition:.22s ease;cursor:pointer
}
.btn-primary{background:linear-gradient(135deg,var(--brand),#6ab7ff);color:white;box-shadow:0 14px 32px rgba(75,136,255,.22)}
.btn-secondary{background:rgba(255,255,255,.78);border-color:var(--line);color:var(--text)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--muted)}
.btn:hover{transform:translateY(-1px)}
.badge-row{display:flex;gap:.55rem;flex-wrap:wrap}
.badge{
  display:inline-flex;align-items:center;gap:.42rem;padding:.48rem .74rem;border-radius:999px;
  background:rgba(255,255,255,.82);border:1px solid var(--line);font-size:.8rem;color:var(--muted)
}
.section{padding:1.6rem 0 4.2rem}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:1rem;margin-bottom:1.3rem}
.section-head h2{margin:0;font-size:clamp(1.6rem, 4vw, 2.7rem);line-height:1.08;letter-spacing:-.03em}
.section-head p{max-width:58ch;margin:0;color:var(--muted);line-height:1.75}
.grid{
  display:grid;gap:1rem
}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  position:relative;padding:1.15rem 1.15rem 1.2rem;border-radius:22px;
  background:var(--surface-strong);border:1px solid var(--line);box-shadow:var(--shadow-soft);
  overflow:hidden
}
.card::after{
  content:"";position:absolute;inset:auto -20% -62% auto;width:180px;height:180px;
  background:radial-gradient(circle, rgba(124,214,255,.16), transparent 65%);
  pointer-events:none
}
.card h3{margin:.3rem 0 .55rem;font-size:1.14rem}
.card p{margin:.35rem 0 0;color:var(--muted);line-height:1.75}
.card .meta{display:flex;gap:.5rem;flex-wrap:wrap;margin:.75rem 0}
.chip{
  display:inline-flex;align-items:center;padding:.34rem .6rem;border-radius:999px;
  font-size:.75rem;background:#f8fbff;border:1px solid var(--line);color:#49637f
}
.notice{
  padding:1rem 1.1rem;border-radius:18px;background:rgba(255,255,255,.78);
  border:1px solid var(--line);color:var(--text);line-height:1.8
}
.notice strong{color:#245db3}
.work-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.work-card{
  display:flex;flex-direction:column;gap:.8rem;padding:1.2rem;border-radius:22px;
  background:rgba(255,255,255,.84);border:1px solid var(--line);box-shadow:var(--shadow-soft)
}
.work-card h3{margin:0;font-size:1.15rem}
.work-card p{margin:0;color:var(--muted);line-height:1.75}
.work-footer{display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap;margin-top:auto}
.tiny{font-size:.82rem;color:var(--muted)}
.quote-block{
  padding:1.4rem;border-left:3px solid var(--brand);border-radius:18px;
  background:rgba(255,255,255,.66);line-height:1.95;color:var(--text)
}
.footer{
  padding:2rem 0 2.8rem;margin-top:3rem;border-top:1px solid rgba(153,179,212,.2);color:var(--muted)
}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,.8fr);gap:1rem}
.footer h4{margin:0 0 .9rem;color:var(--text)}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin:.45rem 0}
.page-hero{
  padding:4.4rem 0 2.2rem
}
.page-hero h1{
  margin:.5rem 0 .8rem;font-size:clamp(2rem,5vw,4rem);line-height:1.04;letter-spacing:-.04em
}
.page-hero p{max-width:66ch;color:var(--muted);line-height:1.85;margin:0}
.mast{
  min-height:360px;display:flex;flex-direction:column;justify-content:space-between;gap:1.2rem
}
.split{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.list-clean{padding-left:1.1rem;margin:.8rem 0 0}
.list-clean li{margin:.55rem 0;color:var(--muted);line-height:1.75}
.repo-card .repo-top{
  display:flex;align-items:start;justify-content:space-between;gap:1rem;margin-bottom:.8rem
}
.repo-name{font-weight:800}
.muted-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted)}
.archive-frame{
  max-width:860px;margin:0 auto;padding:1.2rem
}
.article-shell{
  max-width:840px;margin:0 auto;padding:1.4rem
}
.article-head{margin-bottom:1.4rem}
.article-head h1{margin:.55rem 0;font-size:clamp(2rem, 4.5vw, 3.25rem);line-height:1.08}
.article-body{font-size:1.06rem;line-height:1.95;color:var(--text)}
.article-body p{margin:0 0 1.1rem}
.article-body h2{font-size:1.4rem;margin:2rem 0 .8rem}
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.center-shell{display:grid;place-items:center;min-height:100vh;padding:2rem}
.unspoken-body{
  user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;
  background:
    radial-gradient(circle at 30% 15%, rgba(160,209,255,.24), transparent 32%),
    radial-gradient(circle at 70% 0%, rgba(134,180,255,.22), transparent 28%),
    linear-gradient(180deg,#edf6ff 0%,#f7fbff 55%,#eef5ff 100%);
}
.unspoken-window{
  width:min(100%, 920px);
  min-height:78vh;
  padding:2rem;
  border-radius:32px;
  background:rgba(255,255,255,.38);
  border:1px solid rgba(255,255,255,.56);
  box-shadow:0 24px 80px rgba(58,102,164,.18);
  backdrop-filter:blur(34px) saturate(145%);
  position:relative;overflow:hidden
}
.unspoken-window::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(255,255,255,.34), rgba(255,255,255,.08));
  pointer-events:none
}
.unspoken-top{
  display:flex;justify-content:space-between;gap:1rem;align-items:start;margin-bottom:2rem;position:relative;z-index:1
}
.unspoken-label{font-size:.76rem;letter-spacing:.22em;text-transform:uppercase;color:#5a718b}
.unspoken-sub{margin-top:.45rem;color:#6d8198}
.fragment-stack{display:grid;gap:1rem;position:relative;z-index:1}
.fragment{
  padding:1.05rem 1.15rem;border-radius:22px;
  background:rgba(255,255,255,.28);
  border:1px solid rgba(255,255,255,.5);
  box-shadow:0 10px 26px rgba(64,111,173,.08);
  line-height:1.9;font-size:1.03rem;color:#12263f
}
.fragment.active{outline:1px solid rgba(75,136,255,.28);background:rgba(255,255,255,.42)}
.reading-status{font-size:.88rem;color:#5f738b}
.note-mini{font-size:.78rem;color:#69809a}
.no-copy{
  pointer-events:none;
}
@media (max-width: 980px){
  .hero-grid,.split,.footer-grid,.grid-4,.grid-3,.rule-grid,.work-grid{grid-template-columns:1fr}
}
@media (max-width: 820px){
  .nav{display:none;position:absolute;inset:78px 1rem auto 1rem;flex-direction:column;align-items:stretch;background:rgba(248,251,255,.95);padding:.8rem;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .mobile-toggle{display:inline-flex}
  .header-inner{min-height:72px}
  .hero{padding-top:4.5rem}
}

.prd-layout{display:grid;gap:1.2rem}
.prd-meta-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem;margin:1rem 0 1.25rem}
.prd-meta-item{padding:.8rem .9rem;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.72)}
.prd-meta-label{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.prd-meta-value{font-size:.95rem;color:var(--text);margin-top:.3rem}

.layout-split-screen{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.layout-split-screen .pane{padding:1rem;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.7);line-height:1.9}

.layout-story-fragments{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem}
.layout-story-fragments .fragment-card{padding:.9rem;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.76);min-height:130px}

.layout-flowchart{display:grid;gap:.75rem}
.flow-node{padding:.95rem 1rem;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.8);position:relative}
.flow-node::after{content:"↓";position:absolute;left:50%;bottom:-.9rem;transform:translateX(-50%);color:var(--muted)}
.flow-node:last-child::after{display:none}

.layout-article-columns{column-count:2;column-gap:1.2rem}
.layout-article-columns p{break-inside:avoid;page-break-inside:avoid}

.layout-research-brief{display:grid;gap:.9rem}
.brief-row{display:grid;grid-template-columns:190px 1fr;gap:.8rem;padding:.85rem;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.78)}

.layout-idea-fragment-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem}
.idea-tile{padding:1rem;border-radius:16px;border:1px dashed var(--line-strong);background:rgba(255,255,255,.75);min-height:128px}

.layout-idea-canvas{display:grid;grid-template-columns:1.2fr .8fr;gap:1rem}
.layout-idea-canvas .canvas-main,.layout-idea-canvas .canvas-side{padding:1rem;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.76)}

.layout-lab-notes{display:grid;gap:.8rem}
.note-item{padding:.9rem 1rem;border-left:3px solid var(--brand);border-radius:14px;background:rgba(255,255,255,.75)}

@media (max-width: 980px){
  .prd-meta-grid,.layout-split-screen,.layout-story-fragments,.layout-idea-fragment-grid,.layout-idea-canvas,.brief-row{grid-template-columns:1fr}
  .layout-article-columns{column-count:1}
}