:root{
  --paper:#E6EEF4;
  --paper-raised:#FBFDFE;
  --ink:#1B242E;
  --ink-soft:#4B5866;
  --line:#C3D3DE;
  --finance:#2B6E63;
  --finance-tint:#E3EEEA;
  --art:#C97B3D;
  --art-tint:#F6E8D8;
  --youtube:#B4483A;
  --youtube-tint:#F4E0DB;
  --tape:#E8C468;
  --radius:2px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Noto Sans TC','Space Grotesk',sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
.mono{
  font-family:'IBM Plex Mono','Noto Sans TC',monospace;
  letter-spacing:0.06em;
  text-transform:uppercase;
}
.wrap{max-width:1080px; margin:0 auto; padding:0 28px;}

/* page accent bar */
.page-accent{height:5px; width:100%; background:var(--line);}
.page-accent.finance{background:var(--finance);}
.page-accent.art{background:var(--art);}
.page-accent.youtube{background:var(--youtube);}

/* ---- nav ---- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(230,238,244,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.navrow{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 28px; max-width:1080px; margin:0 auto;
}
.brand{
  font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:17px;
  text-decoration:none; display:flex; align-items:baseline; gap:8px;
}
.brand .mono{font-size:10px; color:var(--ink-soft); font-weight:500;}
nav.links{display:flex; gap:28px;}
nav.links a{
  font-size:14.5px; text-decoration:none; color:var(--ink-soft);
  padding:4px 2px; border-bottom:2px solid transparent;
}
nav.links a:hover, nav.links a:focus-visible, nav.links a.active{color:var(--ink); border-bottom-color:var(--ink);}
.navtoggle{display:none;}

/* ---- hero ---- */
.hero{padding:72px 0 60px;}
.hero-banner{
  width:100%; display:block; border-radius:12px; margin-bottom:24px;
  border:1px solid var(--line); box-shadow:0 18px 40px -28px rgba(30,36,31,0.35);
}
.card{
  background:var(--paper-raised); border:1px solid var(--line);
  border-radius:var(--radius); position:relative;
}
.hero-card{padding:56px 48px; box-shadow:0 18px 40px -28px rgba(30,36,31,0.35); border-left:4px solid var(--ink);}
.tape{
  position:absolute; top:-14px; left:44px; width:88px; height:26px;
  background:var(--tape); opacity:0.85; transform:rotate(-3deg);
}
.eyebrow{font-size:11.5px; color:var(--ink-soft); margin-bottom:22px; display:block;}
h1{
  font-family:'Space Grotesk',sans-serif; font-weight:700;
  font-size:clamp(30px,4.6vw,48px); line-height:1.18; margin:0 0 20px; letter-spacing:-0.01em;
}
.hero p.lead{font-size:18.5px; line-height:1.7; color:var(--ink-soft); max-width:580px; margin:0 0 32px;}
.cta-row{display:flex; flex-wrap:wrap; gap:12px;}
.btn{
  display:inline-block; font-size:14.5px; font-weight:500; padding:12px 20px;
  border-radius:var(--radius); text-decoration:none; border:1px solid var(--ink);
  transition:transform 0.15s ease, background 0.15s ease;
}
.btn:hover, .btn:focus-visible{transform:translateY(-2px);}
.btn-solid{background:var(--ink); color:var(--paper-raised);}
.btn-solid:hover{background:#333d2f;}
.btn-outline{background:transparent; color:var(--ink);}
.btn-outline:hover{background:var(--ink); color:var(--paper-raised);}

/* ---- section shell ---- */
section{padding:64px 0;}
.section-head{margin-bottom:36px; max-width:640px;}
.section-head .mono{font-size:11.5px; color:var(--ink-soft); display:block; margin-bottom:12px;}
.section-head h2{
  font-family:'Space Grotesk',sans-serif; font-size:clamp(22px,3vw,32px);
  margin:0 0 12px; letter-spacing:-0.01em;
}
.section-head p{color:var(--ink-soft); margin:0; font-size:16.5px; line-height:1.7;}

/* ---- timeline ---- */
.timeline{border-top:1px solid var(--line);}
.tl-row{display:grid; grid-template-columns:120px 1fr; gap:24px; padding:22px 0; border-bottom:1px solid var(--line);}
.tl-row .mono{font-size:12.5px; color:var(--ink-soft); padding-top:2px;}
.tl-row h3{margin:0 0 6px; font-size:17px; font-family:'Space Grotesk',sans-serif;}
.tl-row p{margin:0; color:var(--ink-soft); font-size:15.5px; line-height:1.65;}
.tl-row.now h3::after{
  content:"NOW"; font-family:'IBM Plex Mono',monospace; font-size:10px;
  background:var(--tape); color:var(--ink); padding:2px 8px; margin-left:10px;
  border-radius:2px; vertical-align:middle;
}

/* ---- experiment entry cards (hub) ---- */
.exp-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.exp-card{
  padding:0; overflow:hidden; display:flex; flex-direction:column;
  text-decoration:none; color:var(--ink);
  transition:transform 0.18s ease, box-shadow 0.18s ease;
}
.exp-card:hover, .exp-card:focus-visible{transform:translateY(-4px); box-shadow:0 20px 32px -22px rgba(30,36,31,0.4);}
.exp-strip{height:8px;}
.exp-strip.finance{background:var(--finance);}
.exp-strip.art{background:var(--art);}
.exp-strip.youtube{background:var(--youtube);}
.exp-body{padding:26px 24px 28px;}
.exp-tag{font-size:11.5px; margin-bottom:14px; display:block;}
.exp-tag.finance{color:var(--finance);}
.exp-tag.art{color:var(--art);}
.exp-tag.youtube{color:var(--youtube);}
.exp-card h3{font-family:'Space Grotesk',sans-serif; font-size:20px; margin:0 0 10px;}
.exp-card p{font-size:15px; line-height:1.65; color:var(--ink-soft); margin:0 0 18px;}
.exp-more{font-size:13.5px; font-weight:600; display:inline-flex; align-items:center; gap:6px;}

/* ---- protocol cards (finance) ---- */
.proto-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.proto{padding:26px 22px; display:flex; flex-direction:column; gap:16px;}
.proto .num{font-size:11.5px; color:var(--finance);}
.proto h4{margin:0; font-size:18px; font-family:'Space Grotesk',sans-serif;}
.proto .for{font-size:14px; line-height:1.6; color:var(--ink-soft); margin:0;}
.proto ul{margin:0; padding-left:18px; font-size:14.5px; line-height:1.65; color:var(--ink); display:flex; flex-direction:column; gap:6px;}
.proto .btn{align-self:flex-start; margin-top:auto; font-size:13.5px; padding:9px 16px;}

/* ---- art page ---- */
.two-col{display:grid; grid-template-columns:1.1fr 0.9fr; gap:32px; align-items:start;}
.service-mini{padding:22px; margin-bottom:16px;}
.service-mini h4{margin:0 0 8px; font-family:'Space Grotesk',sans-serif; font-size:17px;}
.service-mini p{margin:0; font-size:15px; line-height:1.65; color:var(--ink-soft);}
.portfolio-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:10px;}
.portfolio-grid div{
  aspect-ratio:1; background:var(--art-tint); border:1px solid var(--line);
  border-radius:var(--radius); overflow:hidden;
  display:flex; align-items:center; justify-content:center; font-size:11px; color:var(--art);
}
.portfolio-grid img{width:100%; height:100%; object-fit:cover; display:block; transition:transform 0.25s ease;}
.portfolio-grid div:hover img{transform:scale(1.06);}

/* ---- youtube page ---- */
.yt-card{padding:30px; display:flex; gap:24px; align-items:flex-start; flex-wrap:wrap;}
.yt-thumb{
  width:180px; height:180px; flex:none; border-radius:50%;
  background:var(--youtube-tint); border:1px solid var(--youtube);
  display:flex; align-items:center; justify-content:center;
  font-family:'Space Grotesk',sans-serif; font-weight:700; color:var(--youtube);
  text-align:center; font-size:14px; line-height:1.4; padding:12px; overflow:hidden;
}
.yt-info{flex:1; min-width:260px;}
.yt-info p{font-size:15.5px; line-height:1.7;}
.coming-soon{display:inline-block; margin-top:14px; font-size:11px; background:var(--tape); padding:4px 10px; border-radius:2px;}
.topic-list{list-style:none; margin:18px 0 0; padding:0; display:flex; flex-direction:column; gap:10px;}
.topic-list li{font-size:15px; color:var(--ink-soft); padding-left:18px; position:relative;}
.topic-list li::before{content:"▸"; position:absolute; left:0; color:var(--youtube);}

/* ---- why section ---- */
.why{background:var(--paper-raised); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.why .wrap{max-width:720px;}
.why p{font-size:17.5px; line-height:1.75; color:var(--ink-soft); margin:0 0 18px;}
.why strong{color:var(--ink);}

/* ---- article cards (finance) ---- */
.article-grid{display:flex; flex-direction:column; gap:12px;}
.article-card{padding:18px 22px; display:flex; flex-direction:column; gap:6px; text-decoration:none; color:var(--ink); transition:border-color 0.15s ease;}
.article-card:hover, .article-card:focus-visible{border-color:var(--finance);}
.article-card .date{font-size:11px; color:var(--ink-soft);}
.article-card h4{margin:0; font-size:16.5px; font-family:'Space Grotesk',sans-serif;}
.article-card p{margin:0; font-size:14.5px; color:var(--ink-soft); line-height:1.65;}
.article-card .readmore{font-size:13px; font-weight:600; color:var(--finance); margin-top:2px;}

/* ---- credibility strip (finance) ---- */
.credibility{display:flex; gap:32px; flex-wrap:wrap; padding:28px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.credibility div{flex:1; min-width:160px;}
.credibility .num{font-family:'Space Grotesk',sans-serif; font-size:32px; font-weight:700; color:var(--finance);}
.credibility .label{font-size:13.5px; color:var(--ink-soft);}

/* ---- cross-link footer note ---- */
.crosslink{font-size:14px; color:var(--ink-soft); text-align:center; padding:18px 0 0;}
.crosslink a{color:var(--ink); text-decoration:underline;}

/* ---- footer ---- */
footer{padding:48px 0 44px;}
.foot-row{display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; align-items:flex-start;}
footer .mono{font-size:11px; color:var(--ink-soft);}
.foot-links{display:flex; gap:18px; flex-wrap:wrap;}
.foot-links a{font-size:14px; text-decoration:none; color:var(--ink-soft);}
.foot-links a:hover{color:var(--ink); text-decoration:underline;}

/* ---- formal theme overrides (finance page) ---- */
body.theme-formal .tape{display:none;}
body.theme-formal .hero-card{box-shadow:0 10px 24px -20px rgba(30,36,31,0.28);}

@media (max-width:860px){
  .exp-grid, .proto-grid, .portfolio-grid{grid-template-columns:1fr;}
  .two-col{grid-template-columns:1fr;}
  .credibility{flex-direction:column; gap:18px;}
  nav.links{
    position:absolute; top:100%; left:0; right:0; background:var(--paper);
    border-bottom:1px solid var(--line); flex-direction:column;
    padding:12px 28px 20px; gap:6px; display:none;
  }
  nav.links.open{display:flex;}
  .navtoggle{
    display:inline-flex; background:none; border:1px solid var(--ink);
    padding:6px 10px; font-family:'IBM Plex Mono',monospace; font-size:11px;
    cursor:pointer; border-radius:2px;
  }
  .hero-card{padding:40px 24px;}
  .yt-card{flex-direction:column; align-items:center; text-align:center;}
}
:focus-visible{outline:2px solid var(--finance); outline-offset:2px;}