/* v4: physical stage — a deck of cards for Business, a book that opens for Works. Paper edges and depth, no shadows. */

/* ---------- deck ---------- */
.has-stage .deck{display:grid;grid-template-columns:240px 1fr;gap:40px;align-items:start}
.deck-index{list-style:none;margin:0;padding:0;font:400 12px/1 var(--font-mono);letter-spacing:.08em}
.deck-index button{appearance:none;background:none;border:0;border-top:1px solid var(--line);width:100%;text-align:left;padding:16px 0;color:var(--ink-soft);font:inherit;cursor:pointer;display:grid;grid-template-columns:32px 32px 1fr;align-items:center;gap:8px;line-height:1.5}
.deck-index li:last-child button{border-bottom:1px solid var(--line)}
.deck-index .tick{display:block;height:1px;width:14px;background:var(--line-strong);transition:width .35s,background .35s}
.deck-index button:hover{color:var(--ink)}
.deck-index button[aria-current=true]{color:var(--ink)}
.deck-index button[aria-current=true] .tick{width:28px;background:var(--clay)}
.deck-index button:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.has-stage .pillars{display:block;position:relative;border:0;background:none;height:500px;perspective:1400px;margin:0 60px 24px 0}
.has-stage .pillar{position:absolute;inset:0;border:1px solid var(--line-strong);transition:transform .7s cubic-bezier(.2,.8,.2,1);transform-origin:50% 60%;will-change:transform;cursor:pointer;padding:36px 36px 40px;outline:none}
.has-stage .pillar:not([aria-hidden]){cursor:auto}
.has-stage .pillar::after{content:"";position:absolute;inset:6px;border:1px solid var(--line);pointer-events:none}
.has-stage .pillar:focus-visible{outline:2px solid var(--focus);outline-offset:4px}
.has-stage .pillar .no .ic{width:36px;height:36px}
.pillar .big{position:absolute;right:28px;bottom:16px;font:300 112px/1 var(--font-mono);letter-spacing:-.05em;color:var(--line);pointer-events:none;user-select:none}
.has-stage .pillar h3{font-size:28px}
.has-stage .pillar p{max-width:520px}
@media (max-width:1000px){.has-stage .deck{grid-template-columns:200px 1fr;gap:24px}.has-stage .pillars{margin-right:40px;height:540px}}
@media (max-width:860px){
  .has-stage .deck{grid-template-columns:1fr;gap:12px}
  .deck-index{display:flex;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line)}
  .deck-index::-webkit-scrollbar{display:none}
  .deck-index li{flex:none}
  .deck-index button{grid-template-columns:auto auto;gap:8px;padding:10px 16px 10px 0;border:0;white-space:nowrap}
  .deck-index .tick{display:none}
  .deck-index li:last-child button{border:0}
  .has-stage .pillars{height:auto;perspective:none;display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;padding:12px 2px 18px;margin:0 -16px;scroll-padding:0 16px;scrollbar-width:none}
  .has-stage .pillars::-webkit-scrollbar{display:none}
  .has-stage .pillars::before,.has-stage .pillars::after{content:"";flex:0 0 2px}
  .has-stage .pillar{position:relative;inset:auto;flex:0 0 84%;scroll-snap-align:center;transition:none;padding:28px 20px 32px;min-height:360px;cursor:auto}
  .has-stage .pillar h3{font-size:24px}
  .pillar .big{font-size:80px;right:18px;bottom:10px}
}

/* ---------- book ---------- */
.book{position:relative;perspective:2400px;margin:8px 0 0}
.book-inner{position:relative;height:560px;transform-style:preserve-3d}
.book-spread{position:absolute;inset:0;display:grid;grid-template-columns:1fr 1fr}
.page{position:relative;background:var(--surface-100);border:1px solid var(--line-strong)}
.page-left{border-right:1px solid var(--line);padding:32px 36px;opacity:0;transition:opacity .5s .55s;display:flex;flex-direction:column}
.book.open .page-left{opacity:1}
.page-left .en{margin:0 0 10px}
.bk-title{font-weight:300;font-size:28px;letter-spacing:-.02em;margin:0 0 20px}
.bk-toc{list-style:none;margin:0;padding:0;font:400 12px/1.4 var(--font-mono);letter-spacing:.06em;flex:1}
.bk-toc button{appearance:none;background:none;border:0;border-top:1px solid var(--line);width:100%;text-align:left;padding:9px 0;color:var(--ink-soft);font:inherit;cursor:pointer;display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:baseline}
.bk-toc li:last-child button{border-bottom:1px solid var(--line)}
.bk-toc button:hover{color:var(--ink)}
.bk-toc button[aria-current=true]{color:var(--ink)}
.bk-toc button[aria-current=true] .no{color:var(--clay-text)}
.bk-toc button:focus-visible{outline:2px solid var(--focus);outline-offset:-2px}
.bk-foot{margin:16px 0 0;font-size:12px;line-height:1.7;color:var(--ink-soft)}
.page-right{border-left:0;overflow:visible}
.leaf{position:absolute;inset:-1px;transform-origin:left center;transform-style:preserve-3d;transition:transform .95s cubic-bezier(.3,.7,.2,1),visibility 0s .95s;visibility:visible}
.leaf.flipped{transform:rotateY(-180deg);visibility:hidden}
.leaf .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--surface-100);border:1px solid var(--line-strong);padding:32px 36px 72px}
.leaf .face.front::after{content:"";position:absolute;left:0;top:0;bottom:0;width:10px;border-right:1px solid var(--line);background:linear-gradient(to right,var(--surface-200),var(--surface-100))}
.leaf .face.back{transform:rotateY(180deg);background:var(--surface-200);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.leaf .back .big-ic{width:96px;height:96px;stroke-width:1}
.leaf .tool.on-leaf{border:0;background:none;padding:0;min-height:0;height:100%;gap:12px}
.leaf .tool.on-leaf .tag .ic{width:18px;height:18px}
.leaf .tool.on-leaf h3{font-size:28px;font-weight:300;letter-spacing:-.02em;margin:8px 0 0}
.leaf .tool.on-leaf p{font-size:15px;line-height:1.9;max-width:460px}
.leaf .tool.on-leaf .go,.leaf .tool.on-leaf .wip{font-size:13px}
a.tool.on-leaf:hover{background:none}
a.tool.on-leaf:hover h3{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}
.folio{position:absolute;right:36px;bottom:28px;font:400 11px/1 var(--font-mono);letter-spacing:.12em;color:var(--ink-mute)}
.bk-nav{position:absolute;left:36px;bottom:20px;display:flex;align-items:center;gap:12px;z-index:30;font:400 12px/1 var(--font-mono);letter-spacing:.1em;color:var(--ink-soft)}
.bk-nav .es-btn{width:36px;padding:0}
.book-cover{position:absolute;top:-1px;bottom:-1px;left:50%;right:-1px;transform-origin:left center;transform-style:preserve-3d;transition:transform 1.15s cubic-bezier(.3,.7,.2,1),visibility 0s 1.15s;z-index:40;cursor:pointer;visibility:visible}
.book-cover .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;padding:36px 40px;display:flex;flex-direction:column}
.book-cover .face.front{background:var(--ink);color:var(--on-ink);border:1px solid var(--ink)}
.book-cover .face.front .en{color:var(--on-ink);opacity:.7}
.book-cover .face.front::before{content:"";position:absolute;inset:14px;border:1px solid var(--on-ink);opacity:.35}
.book-cover .face.back{transform:rotateY(180deg);background:var(--surface-200);border:1px solid var(--line-strong);color:var(--ink)}
.cv-title{margin:auto 0 0;font-weight:300;font-size:40px;line-height:1.2;letter-spacing:-.03em}
.cv-title span{display:block;white-space:nowrap}
.cv-hint{margin:28px 0 0;font:400 12px/1 var(--font-mono);letter-spacing:.14em;opacity:.8}
.cv-note{margin:auto 0 0;font-size:14px;line-height:1.9;color:var(--ink-soft);max-width:380px}
.book.open .book-cover{transform:rotateY(-180deg);cursor:auto;pointer-events:none;visibility:hidden}
@media (prefers-reduced-motion:reduce){.leaf,.book-cover,.page-left,.has-stage .pillar{transition:none}}
@media (max-width:1000px){.book-inner{height:600px}.leaf .face{padding:28px 28px 72px}.page-left{padding:28px}}
@media (max-width:860px){
  .book{perspective:1600px}
  .book-inner{height:440px}
  .book-spread{grid-template-columns:1fr}
  .page-left{display:none}
  .book-cover{left:-1px}
  .leaf .face{padding:24px 20px 72px}
  .leaf .tool.on-leaf h3{font-size:24px}
  .leaf .tool.on-leaf p{font-size:14px}
  .bk-nav{left:20px}
  .folio{right:20px}
  .book-cover .face{padding:28px 24px}
  .cv-title{font-size:32px}
}

/* ---------- motion: reveals, HUD, sensitivity lab ---------- */
.has-stage .sec > .wrap,.has-stage .band > .wrap{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .9s cubic-bezier(.2,.8,.2,1)}
.has-stage .in > .wrap{opacity:1;transform:none}
.has-stage #business .pillars{opacity:0;transform:translateY(70px) rotateX(10deg);transition:opacity .6s .2s,transform 1s .2s cubic-bezier(.2,.8,.2,1)}
.has-stage #business.in .pillars{opacity:1;transform:none}
.has-stage .pillar{backface-visibility:hidden}
.hero{position:relative}
.hud{position:absolute;right:64px;bottom:44px;z-index:2;width:200px;padding:12px 14px 10px;border:1px solid var(--line-strong);background:var(--surface-100);font:400 11px/1.6 var(--font-mono);letter-spacing:.1em;color:var(--ink-soft);pointer-events:none}
@supports (backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px)){.hud{background:color-mix(in srgb,var(--surface-100) 78%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}}
.hud::before{content:"";position:absolute;right:100%;top:18px;width:72px;height:1px;background:var(--line-strong)}
.hud::after{content:"";position:absolute;right:calc(100% + 72px);top:15px;width:6px;height:6px;border:1px solid var(--clay);transform:rotate(45deg)}
.hud-row{display:flex;justify-content:space-between;gap:8px}
.hud-row .v{color:var(--ink);font-variant-numeric:tabular-nums}
.hud-spark{display:block;width:100%;height:34px;margin:8px 0 6px}
.hud-cap{margin:0;font-size:9px;letter-spacing:.2em;color:var(--ink-mute)}
.lab{margin-top:32px;border:1px solid var(--line-strong);padding:28px 32px 24px;display:grid;grid-template-columns:260px 1fr;gap:24px 40px;position:relative}
.lab::after{content:"";position:absolute;inset:6px;border:1px solid var(--line);pointer-events:none}
.lab-head .en{margin:0 0 8px}.lab-head h3{font-weight:400;font-size:22px;letter-spacing:-.02em;margin:0 0 10px}
.lab-sub{margin:0;font-size:13px;line-height:1.85;color:var(--ink-soft)}.lab-sub span{display:inline-block}
.lab-ctl{display:flex;flex-direction:column;gap:14px;justify-content:center}
.lab-ctl label{display:grid;grid-template-columns:120px 1fr 48px;align-items:center;gap:14px;font-size:13px}
.lab-ctl .k{color:var(--ink-soft)}
.lab-ctl output{font:400 12px/1 var(--font-mono);text-align:right;color:var(--ink);font-variant-numeric:tabular-nums}
.lab-ctl input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:1px;background:var(--line-strong);outline:none;margin:0}
.lab-ctl input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;background:var(--surface-100);border:1px solid var(--ink);cursor:pointer}
.lab-ctl input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:0;background:var(--surface-100);border:1px solid var(--ink);cursor:pointer}
.lab-ctl input[type=range]:focus-visible::-webkit-slider-thumb{outline:2px solid var(--focus);outline-offset:2px}
.lab-ctl input[type=range]:active::-webkit-slider-thumb{background:var(--clay);border-color:var(--clay)}
.lab-read{grid-column:1/-1;margin:0;border-top:1px solid var(--line);padding-top:14px;font-size:14px;display:flex;gap:16px;align-items:baseline;flex-wrap:wrap}
.lab-read .k{font:400 11px/1 var(--font-mono);letter-spacing:.14em;color:var(--ink-soft)}
.lab-read b{font-weight:500;color:var(--clay-text);font-variant-numeric:tabular-nums}
.lab-note{font-size:11px;color:var(--ink-mute);margin-left:auto}
@media (max-width:860px){
  .hud{right:16px;bottom:16px;width:168px;padding:10px 12px 8px;font-size:10px}
  .hud::before{width:40px}.hud::after{right:calc(100% + 40px)}
  .lab{grid-template-columns:1fr;padding:22px 16px 18px;gap:18px}
  .lab-ctl label{grid-template-columns:96px 1fr 44px;gap:10px;font-size:12px}
  .lab-note{margin-left:0}
}
@media (prefers-reduced-motion:reduce){.has-stage .sec > .wrap,.has-stage .band > .wrap,.has-stage #business .pillars{transition:none}}

/* ---------- photos on the business cards: one grayscale strip, blended into the paper ---------- */
.pillar.has-img{padding-top:calc(150px + 28px)}
.pillar .ph{position:absolute;left:0;top:0;right:0;height:150px;overflow:hidden;border-bottom:1px solid var(--line)}
.pillar .ph img{display:block;width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.04);mix-blend-mode:multiply;opacity:.94}
@media (prefers-color-scheme:dark){.pillar .ph img{mix-blend-mode:screen;opacity:.8}}
.pillar.has-img::before{z-index:2}
.has-stage .pillar.has-img{padding-top:calc(170px + 28px)}
.has-stage .pillar .ph{height:170px}
.has-stage .pillar::after{top:calc(170px + 6px)}
@media (max-width:860px){
  .pillar.has-img,.has-stage .pillar.has-img{padding-top:calc(120px + 22px)}
  .pillar .ph,.has-stage .pillar .ph{height:120px}
  .has-stage .pillar::after{top:calc(120px + 6px)}
}