/* Artha Mandala Digital — production stylesheet */
/* ───────────── fonts (self-hosted, OFL) ───────────── */
@font-face{font-family:'Archivo';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/archivo-latin-400-normal.woff2) format('woff2'),url(../fonts/archivo-latin-400-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Archivo';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/archivo-latin-500-normal.woff2) format('woff2'),url(../fonts/archivo-latin-500-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Archivo';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/archivo-latin-600-normal.woff2) format('woff2'),url(../fonts/archivo-latin-600-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-400-normal.woff2) format('woff2'),url(../fonts/ibm-plex-sans-latin-400-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-500-normal.woff2) format('woff2'),url(../fonts/ibm-plex-sans-latin-500-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format('woff2'),url(../fonts/ibm-plex-mono-latin-400-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format('woff2'),url(../fonts/ibm-plex-mono-latin-500-normal.woff) format('woff');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
/* ───────────── tokens ───────────── */
:root{
  --ink:#1F2124; --paper:#F4F1EA; --sig:#D64F2A; --slate:#5B5F66; --mist:#D9D5CC; --green:#3B6E4D;
  --bg:var(--paper); --bg2:#ECE8DF; --surface:#FBF9F5; --text:var(--ink); --text2:var(--slate); --muted:#8A8E95;
  --line:var(--mist); --line-strong:var(--ink); --accent:var(--sig); --focus:#1F2124;
  --ink-soft:#2A2D31; --paper-dim:#B9B6AE;
  --ff-display:'Archivo','Helvetica Neue',Helvetica,Arial,sans-serif;
  --ff-body:'IBM Plex Sans','Helvetica Neue',Helvetica,Arial,sans-serif;
  --ff-mono:'IBM Plex Mono',Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --t-micro:200ms; --t-btn:220ms; --t-text:600ms; --t-panel:400ms; --t-scene:900ms; --t-major:1400ms;
  --gutter:clamp(20px,5vw,72px); --measure:62ch;
  box-sizing:border-box; padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
*,*::before,*::after{box-sizing:inherit}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(72px + env(safe-area-inset-top,0px))}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--ff-body);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden;overflow-x:clip}
button{font:inherit}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:var(--paper);padding:10px 16px;font-family:var(--ff-display);font-size:14px;text-decoration:none;transition:top var(--t-micro)}
.skip:focus{top:calc(12px + env(safe-area-inset-top,0px))}
img,svg{max-width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px}
.dark :focus-visible{outline-color:var(--paper)}
h1,h2,h3{font-family:var(--ff-display);font-weight:600;letter-spacing:-.015em;line-height:1.08;margin:0}
h2{font-size:clamp(30px,4.4vw,56px)}
h1,h2,.proof .big,.argument .close{text-wrap:balance}
h3{font-size:clamp(20px,2.2vw,26px);letter-spacing:-.01em}
p{margin:0}
.lede{font-size:clamp(17px,1.5vw,21px);line-height:1.5;color:var(--text2);max-width:var(--measure)}
.mono{font-family:var(--ff-mono);font-variant-numeric:tabular-nums}
.sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.wrap{max-width:1280px;margin:0 auto;padding:0 var(--gutter)}
section{position:relative}
.scene{padding:clamp(88px,12vw,160px) 0}
.dark{background:var(--ink);color:var(--paper)}
.dark .lede{color:var(--paper-dim)}

/* ───────────── buttons ───────────── */
.btn{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 22px;border-radius:2px;font-family:var(--ff-display);font-weight:500;font-size:15px;letter-spacing:.01em;text-decoration:none;border:1px solid var(--ink);color:var(--ink);background:transparent;transition:background var(--t-btn) var(--ease),color var(--t-btn) var(--ease),border-color var(--t-btn) var(--ease),transform var(--t-btn) var(--ease);cursor:pointer}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--ink);color:var(--paper)}
.dark .btn{border-color:var(--paper);color:var(--paper)}
.dark .btn.primary{background:var(--paper);color:var(--ink)}
.btn svg{width:16px;height:16px;flex:none}
@media (hover:hover){
  .btn:hover{background:var(--ink);color:var(--paper)}
  .btn.primary:hover{background:var(--ink-soft)}
  .dark .btn:hover{background:var(--paper);color:var(--ink)}
  .dark .btn.primary:hover{background:#fff}
}
.btn{-webkit-tap-highlight-color:transparent;text-align:center}

/* ───────────── nav ───────────── */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;padding-top:env(safe-area-inset-top,0px);transition:background var(--t-panel) var(--ease),border-color var(--t-panel) var(--ease),backdrop-filter var(--t-panel) var(--ease)}
.nav .in{display:flex;align-items:center;justify-content:space-between;height:76px;transition:height var(--t-panel) var(--ease)}
.nav.solid{background:rgba(244,241,234,.86);backdrop-filter:saturate(1.2) blur(10px);-webkit-backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--line)}
.nav.solid .in{height:64px}
.nav.on-dark:not(.solid){color:var(--paper)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand .mk{width:34px;height:34px;flex:none}
.brand .wm{font-family:var(--ff-display);font-weight:600;letter-spacing:.14em;font-size:13px;text-transform:uppercase;line-height:1}
.brand .wm small{display:block;font-weight:500;letter-spacing:.42em;font-size:7px;margin-top:4px;opacity:.75}
.nav ul{list-style:none;display:flex;gap:clamp(16px,2vw,28px);margin:0;padding:0}
.nav ul a{white-space:nowrap;text-decoration:none;font-size:14px;font-family:var(--ff-display);font-weight:500;opacity:.78;padding:10px 0;display:inline-block;border-bottom:1px solid transparent;transition:opacity var(--t-micro),border-color var(--t-micro)}
.nav ul a:hover,.nav ul a[aria-current="true"]{opacity:1;border-bottom-color:currentColor}
.nav .btn{min-height:40px;padding:0 16px;font-size:14px;white-space:nowrap}
.nav .right{display:flex;align-items:center;gap:18px}
.lang{display:flex;align-items:center;gap:2px;font-family:var(--ff-display);font-weight:500;font-size:13px;letter-spacing:.02em}
.lang a{display:inline-flex;align-items:center;justify-content:center;min-width:34px;min-height:40px;padding:0 6px;text-decoration:none;opacity:.6;border-bottom:1px solid transparent;transition:opacity var(--t-micro)}
.lang a[aria-current="true"]{opacity:1;text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px}
.lang a:hover{opacity:1}
.lang .sep{opacity:.35}
.sheet .lang{font-size:16px;margin-top:28px}
.sheet .lang a{min-height:44px;min-width:44px}
.nav.on-dark:not(.solid) .btn{border-color:var(--paper);color:var(--paper)}
.nav.on-dark:not(.solid) .btn:hover{background:var(--paper);color:var(--ink)}
.menu-btn{display:none;width:44px;height:44px;border:0;background:transparent;color:inherit;cursor:pointer;border-radius:2px}
.menu-btn svg{width:22px;height:22px}
.sheet{display:none}
@media (max-width:1100px){
  .nav ul,.nav .cta{display:none}
  .nav .right{gap:6px}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center}
  .sheet{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;background:var(--paper);color:var(--ink);padding:calc(24px + env(safe-area-inset-top,0px)) var(--gutter) 40px;transform:translateY(-100%);transition:transform var(--t-panel) var(--ease);visibility:hidden}
  .sheet.open{transform:none;visibility:visible}
  .sheet .top{display:flex;justify-content:space-between;align-items:center;margin-bottom:40px}
  .sheet ul{list-style:none;padding:0;margin:0 0 40px;display:flex;flex-direction:column;gap:6px}
  .sheet ul a{display:block;font-family:var(--ff-display);font-weight:600;font-size:clamp(26px,8vw,34px);text-decoration:none;padding:10px 0;border-bottom:1px solid var(--line)}
}

/* ───────────── hero ───────────── */
.hero{min-height:100vh;min-height:100svh;display:grid;align-items:center;padding:calc(110px + env(safe-area-inset-top,0px)) 0 80px;overflow:hidden;isolation:isolate}
.hero .grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(32px,5vw,80px);align-items:center}
.hero .kicker{font-family:var(--ff-display);font-weight:500;font-size:14px;letter-spacing:.02em;color:var(--paper-dim);margin-bottom:26px;display:flex;align-items:center;gap:14px}

.hero h1{font-size:clamp(40px,5.6vw,76px);letter-spacing:-.025em;max-width:12ch}
.hero .lede{margin-top:28px;max-width:52ch}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px}
.hero .cue{position:absolute;left:var(--gutter);bottom:calc(28px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;gap:12px;font-size:12px;color:var(--paper-dim);font-family:var(--ff-display)}
.hero .cue i{display:block;width:1px;height:48px;background:linear-gradient(var(--paper-dim),transparent);transform-origin:top;animation:cue 2.6s var(--ease) infinite}
@keyframes cue{0%{transform:scaleY(0)}45%{transform:scaleY(1);transform-origin:top}46%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.hero .vis{position:relative;aspect-ratio:1;max-width:640px;margin:0 auto;width:100%}
.hero .vis svg{width:100%;height:100%;display:block}
.hero .bgring{position:absolute;inset:-30% -10% -30% -10%;z-index:-1;pointer-events:none;opacity:.55}
.hero .bgring svg{width:100%;height:100%}
.hs .month{transition:height var(--t-panel) var(--ease),y var(--t-panel) var(--ease),fill var(--t-panel) var(--ease)}
.hs .thr{stroke-dasharray:6 8}
.hs .lab{font-family:var(--ff-mono);font-size:13px;fill:var(--paper-dim)}
.hs .lab.on{fill:var(--paper)}
.hs .flag{opacity:0;transition:opacity var(--t-panel) var(--ease)}
.hs .flag.on{opacity:1}

/* text reveal */
.js .rv{opacity:0;transform:translateY(14px);transition:opacity var(--t-text) var(--ease),transform var(--t-text) var(--ease)}
.js .rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:120ms}.rv.d2{transition-delay:240ms}.rv.d3{transition-delay:360ms}

/* ───────────── problem ───────────── */
.problem .grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(40px,6vw,96px)}
.problem h2{max-width:14ch}
.argument{position:relative;padding-left:32px;border-left:1px solid var(--line)}
.argument .step{position:relative;padding:22px 0 30px}
.argument .step::before{content:"";position:absolute;left:-36.5px;top:34px;width:9px;height:9px;border-radius:50%;background:var(--paper);border:1px solid var(--ink);transition:background var(--t-panel) var(--ease)}
.argument .step.in::before{background:var(--ink)}
.argument .step:last-child::before{background:var(--sig);border-color:var(--sig)}
.argument h3{margin-bottom:8px}
.argument p{color:var(--text2);max-width:46ch}
.argument .close{margin-top:10px;padding-top:26px;border-top:1px solid var(--ink);font-family:var(--ff-display);font-weight:600;font-size:clamp(20px,2.2vw,28px);letter-spacing:-.01em;line-height:1.25;max-width:24ch}

/* ───────────── system ───────────── */
.system .grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(32px,5vw,72px);align-items:start}
.sysvis{background:var(--surface);border:1px solid var(--line);padding:clamp(16px,2vw,28px)}
.sysvis svg{width:100%;height:auto;display:block}
.sys-hint{display:none;margin-top:10px;font-size:13px;color:var(--muted);font-family:var(--ff-display)}
.syspanel .tab button:focus-visible{outline-offset:2px}
.sysvis .node{cursor:pointer}
.sysvis .node rect{fill:var(--surface);stroke:var(--ink);stroke-width:1.2;transition:fill var(--t-micro),stroke var(--t-micro)}
.sysvis .node text{font-family:var(--ff-display);font-weight:500;font-size:14px;fill:var(--ink);pointer-events:none}
.sysvis .node .sub{font-family:var(--ff-mono);font-weight:400;font-size:10.5px;fill:var(--slate)}
.sysvis .node.active rect{fill:var(--ink)}
.sysvis .node.active text{fill:var(--paper)}
.sysvis .node.active .sub{fill:var(--paper-dim)}
.sysvis .link{stroke:var(--mist);stroke-width:1.5;fill:none;transition:stroke var(--t-panel) var(--ease),stroke-width var(--t-panel)}
.sysvis .link.lit{stroke:var(--ink);stroke-width:2}
.sysvis .link.sig{stroke:var(--sig)}
.sysvis .dim{opacity:.35;transition:opacity var(--t-panel)}
.syspanel{position:-webkit-sticky;position:sticky;top:96px}
.syspanel .tab{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px;padding:0;list-style:none}
.syspanel .tab button{min-height:44px;padding:0 14px;border:1px solid var(--line);background:transparent;font-family:var(--ff-display);font-weight:500;font-size:14px;color:var(--ink);cursor:pointer;border-radius:2px;transition:background var(--t-micro),border-color var(--t-micro),color var(--t-micro)}
.syspanel .tab button[aria-selected="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.syspanel .body{min-height:190px}
.syspanel .body h3{margin-bottom:10px}
.syspanel .body p{color:var(--text2)}
.syspanel .body .fact{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-family:var(--ff-mono);font-size:13px;color:var(--slate)}
.syspanel .body>div{display:none}
.syspanel .body>div.on{display:block;animation:fade var(--t-panel) var(--ease)}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ───────────── how it works (sticky) ───────────── */
.how{background:var(--bg2)}
.how .intro{padding:clamp(88px,12vw,140px) 0 clamp(24px,4vw,48px)}
.how .intro h2{max-width:16ch}
.sticky-wrap{position:relative;height:520vh}
.sticky{position:-webkit-sticky;position:sticky;top:env(safe-area-inset-top,0px);height:100vh;height:100svh;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,64px);align-items:center;overflow:hidden}
.sticky .scenebox{position:relative;aspect-ratio:1;max-height:78vh;max-height:78svh;margin:0 auto;width:100%;max-width:560px}
.sticky .scenebox svg{width:100%;height:100%;display:block}
.sticky .steps{position:relative;min-height:320px}
.sticky .step{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(14px);transition:opacity var(--t-scene) var(--ease),transform var(--t-scene) var(--ease);pointer-events:none}
.sticky .step.on{opacity:1;transform:none;pointer-events:auto}
.sticky .step .n{font-family:var(--ff-mono);font-size:13px;color:var(--slate);margin-bottom:14px}
.sticky .step h3{font-size:clamp(24px,2.6vw,34px);margin-bottom:14px}
.sticky .step p{color:var(--text2);max-width:44ch}
.sticky .step .keys{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:6px;font-family:var(--ff-mono);font-size:13px;color:var(--slate)}
.progress{position:absolute;left:0;right:0;bottom:calc(20px + env(safe-area-inset-bottom,0px));display:flex;gap:6px;justify-content:center}
.progress i{width:34px;height:2px;background:var(--mist);transition:background var(--t-panel)}
.progress i.on{background:var(--ink)}
/* scene groups */
.sc g[data-stage]{opacity:0;transition:opacity var(--t-scene) var(--ease),transform var(--t-scene) var(--ease);transform-origin:256px 256px}
.sc g[data-stage].on{opacity:1}
.sc .ring{fill:none;stroke:var(--ink);stroke-width:14}
.sc text{font-family:var(--ff-mono);font-size:12px;fill:var(--slate)}
.sc .bar{fill:var(--ink);transition:height var(--t-scene) var(--ease),y var(--t-scene) var(--ease),width var(--t-scene) var(--ease),fill var(--t-scene) var(--ease)}
.sc .bar.sig{fill:var(--sig)}
.sc .bar.up{fill:var(--green)}
.sc .thr{stroke:var(--sig);stroke-width:1.5;stroke-dasharray:5 6}
.sc .rule{stroke:var(--mist);stroke-width:1}
.sc .rule.ink{stroke:var(--ink)}
.sc .score{font-family:var(--ff-display);font-weight:600;font-size:12px}
.sc .score.hi{fill:var(--green)}.sc .score.mid{fill:var(--slate)}.sc .score.lo{fill:var(--sig)}
.sc .memo{fill:var(--surface);stroke:var(--ink);stroke-width:1}
.sc .memo-t{font-family:var(--ff-display);font-weight:600;font-size:13px;fill:var(--ink)}

/* ───────────── proof ───────────── */
.proof .big{font-family:var(--ff-display);font-weight:600;font-size:clamp(28px,4vw,52px);letter-spacing:-.02em;line-height:1.12;max-width:20ch}
.proof .big em{font-style:normal;border-bottom:3px solid var(--sig);padding-bottom:2px}
.proof .grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;margin-top:clamp(40px,6vw,72px);border-top:1px solid var(--ink)}
.proof .cell{padding:26px 22px 26px 0;border-right:1px solid var(--line)}
.proof .cell:last-child{border-right:0}
.proof .cell .v{font-family:var(--ff-mono);font-size:clamp(26px,3vw,40px);font-weight:500;line-height:1;letter-spacing:-.02em}
.proof .cell .l{margin-top:10px;font-size:14px;color:var(--text2);max-width:16ch}

/* ───────────── case ───────────── */
.case{background:var(--ink);color:var(--paper)}
.case .tag{display:inline-flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-size:13px;color:var(--paper-dim);border:1px solid rgba(244,241,234,.28);padding:6px 12px;margin-bottom:26px}
.case .tag i{width:8px;height:8px;background:var(--sig);display:inline-block}
.case h2{max-width:18ch}
.cs{margin-top:clamp(36px,5vw,64px);display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:clamp(24px,4vw,56px);align-items:start}
.cs-vis{border:1px solid rgba(244,241,234,.18);padding:clamp(8px,1.5vw,20px)}
.cs-vis svg{width:100%;height:auto;display:block}
#csSvg .k{opacity:0;transform:translateY(8px);transition:opacity var(--t-scene) var(--ease),transform var(--t-scene) var(--ease)}
#csSvg .k.on{opacity:1;transform:none}
#csSvg .k.past{opacity:.28;transform:none}
#csSvg .cs-base{stroke:var(--paper);stroke-width:1;opacity:.6}
#csSvg .cs-bar{fill:var(--paper);transform-origin:50% 330px}
#csSvg .cs-bar.dim{fill:var(--paper);opacity:.55}
#csSvg .cs-bar.tgt{fill:none;stroke:var(--paper);stroke-width:1.5;stroke-dasharray:5 5}
#csSvg .cs-lbl{font-family:var(--ff-mono);font-size:11px;fill:var(--paper-dim)}
#csSvg .cs-note{font-family:var(--ff-mono);font-size:12px;fill:var(--paper)}
#csSvg .cs-note.sig{fill:var(--sig)}
#csSvg .short{display:none}
#csSvg .cs-chip{font-family:var(--ff-mono);font-size:12px;fill:var(--paper)}
#csSvg .cs-arrow{stroke:var(--paper);stroke-width:1.5;fill:none;marker-end:none}
#csSvg .cs-arrow.sig{stroke:var(--sig)}
#csSvg .cs-ruler{fill:var(--paper);opacity:.5}
#csSvg .cs-seg.down{fill:var(--sig)} #csSvg .cs-seg.up{fill:var(--paper);opacity:.9}
#csSvg .cs-dash{stroke:var(--paper-dim);stroke-width:1;stroke-dasharray:3 4;fill:none}
#csSvg .cs-dash.sig{stroke:var(--sig);stroke-width:1.5}
#csSvg .cs-solid{stroke:var(--paper);stroke-width:1.5}
#csSvg .cs-halo{fill:none;stroke:var(--sig);stroke-width:1.5}
#csSvg .cs-line{stroke:var(--sig);stroke-width:1.5;fill:none}
#csSvg .cs-band{fill:var(--sig);opacity:.85}
#csSvg .cs-m{fill:var(--paper);opacity:.8} #csSvg .cs-m.sig{fill:var(--sig);opacity:1} #csSvg .cs-m.fut{opacity:.25}
.cs-panel{display:flex;flex-direction:column;gap:22px}
.cs-cap{min-height:190px}
.cs-n{font-family:var(--ff-mono);font-size:12px;color:var(--paper-dim);margin-bottom:10px}
.cs-cap h3{font-size:clamp(20px,2vw,26px);margin-bottom:10px}
.cs-cap p{color:var(--paper-dim);font-size:15.5px;max-width:34ch}
.cs-steps{list-style:none;margin:0;padding:0;display:grid;gap:2px;border-top:1px solid rgba(244,241,234,.18)}
.cs-steps button{width:100%;text-align:left;background:transparent;border:0;border-bottom:1px solid rgba(244,241,234,.1);color:var(--paper-dim);font-family:var(--ff-display);font-size:14px;padding:9px 0;min-height:44px;cursor:pointer;-webkit-tap-highlight-color:transparent;display:flex;gap:12px;align-items:center;transition:color var(--t-micro)}
.cs-steps button span{font-family:var(--ff-mono);font-size:11px;width:16px;flex:none}
.cs-steps button[aria-current="true"]{color:var(--paper)}
@media (hover:hover){.cs-steps button:hover{color:var(--paper)}}
.cs-ctl{display:flex;align-items:center;gap:8px}
.cs-btn{width:44px;height:44px;border:1px solid rgba(244,241,234,.35);background:transparent;color:var(--paper);cursor:pointer;display:grid;place-items:center;border-radius:2px;transition:background var(--t-micro),color var(--t-micro)}
@media (hover:hover){.cs-btn:hover{background:var(--paper);color:var(--ink)}}
.cs-btn{-webkit-tap-highlight-color:transparent}
.cs-btn svg{width:18px;height:18px}
.cs-prog{flex:1;height:2px;background:rgba(244,241,234,.18);margin-left:8px;overflow:hidden}
.cs-prog i{display:block;height:100%;width:0;background:var(--paper);transition:width 120ms linear}
.case .foot{margin-top:28px;font-size:13px;color:var(--paper-dim);max-width:70ch}

/* ───────────── about ───────────── */
.about .grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,6vw,96px)}
.about h2{max-width:12ch}
.about .cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(24px,4vw,48px)}
.about .cols>div{padding-top:18px;border-top:1px solid var(--ink)}
.about .cols h3{font-size:17px;margin-bottom:8px}
.about .cols p{color:var(--text2);font-size:15.5px}
.about .people{margin-top:clamp(32px,5vw,56px);padding-top:22px;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.about .people .p{display:flex;gap:14px;align-items:flex-start}
.about .people .p .av{width:44px;height:44px;border:1px solid var(--line);flex:none;display:grid;place-items:center;font-family:var(--ff-display);font-weight:600;color:var(--slate)}
.about .people .p b{font-weight:500;display:block}
.about .people .p span{color:var(--text2);font-size:14px}

/* ───────────── final ───────────── */
.final{min-height:88vh;min-height:88svh;display:grid;align-items:center;overflow:hidden;isolation:isolate}
.final .grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(32px,5vw,80px);align-items:center}
.final h2{font-size:clamp(34px,5vw,68px);letter-spacing:-.025em;max-width:14ch}
.final .lede{margin-top:22px;max-width:48ch}
.final .ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.final .contact{margin-top:34px;font-family:var(--ff-mono);font-size:14px;color:var(--paper-dim);display:grid;gap:6px}
.final .vis{aspect-ratio:1;max-width:520px;margin:0 auto;width:100%}
.final .vis svg{width:100%;height:100%;display:block}
footer{border-top:1px solid rgba(244,241,234,.18)}
footer .in{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;padding:26px 0;font-size:13px;color:var(--paper-dim)}
footer ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;margin:0;padding:0}
footer ul a{display:inline-block;padding:6px 0}
footer a{text-decoration:none}
footer a:hover{color:var(--paper)}
.contact a{text-decoration:none}
.contact a:hover{text-decoration:underline}

/* ───────────── responsive ───────────── */
@media (max-width:980px){
  .hero .grid,.problem .grid,.system .grid,.about .grid,.final .grid{grid-template-columns:minmax(0,1fr)}
  .hero .vis{max-width:460px}
  .hero h1{max-width:14ch}
  .syspanel{position:static}
  .proof .grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .proof .cell:nth-child(3){border-right:0}
  .proof .cell:nth-child(n+4){border-top:1px solid var(--line)}
  .cs{grid-template-columns:minmax(0,1fr)}
  .cs-cap{min-height:0}
  .sticky-wrap{height:auto}
  .sticky{position:sticky;top:calc(60px + env(safe-area-inset-top,0px));height:auto;grid-template-columns:minmax(0,1fr);gap:0;align-items:start;background:var(--bg2);z-index:2;padding-bottom:12px}
  .sticky .scenebox{max-height:44vh;max-width:44vh;max-height:44svh;max-width:44svh}
  .sticky .steps{display:none}
  .progress{display:none}
  .mobile-steps{display:block}
}
@media (min-width:981px){.mobile-steps{display:none}}
@media (max-width:980px){
  .sc text{font-size:15px}
  .sc .score{font-size:15px}
  .sc .memo-t{font-size:15px}
  .hero{min-height:0;padding-bottom:72px}
}
@media (max-width:700px){
  .sysvis{overflow-x:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain}
  .sysvis svg{min-width:720px}
  .sys-hint{display:block}
  #csSvg .cs-lbl{font-size:14px}
  #csSvg [data-k="bridge"] .cs-lbl{font-size:12px}
  #csSvg .cs-chip,#csSvg .cs-note{font-size:16px}
  #csSvg .full{display:none}
  #csSvg .short{display:inline}
  .cs-vis{padding:6px}
}
.mobile-steps{padding:24px 0 80px}
.mobile-steps .ms{padding:26px 0;border-top:1px solid var(--line)}
.mobile-steps .ms .n{font-family:var(--ff-mono);font-size:13px;color:var(--slate);margin-bottom:8px}
.mobile-steps .ms h3{font-size:22px;margin-bottom:8px}
.mobile-steps .ms p{color:var(--text2)}
@media (max-width:600px){
  body{font-size:16px}
  .about .cols,.about .people{grid-template-columns:minmax(0,1fr)}
  .proof .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .proof .cell:nth-child(3){border-right:1px solid var(--line)}
  .proof .cell:nth-child(2n){border-right:0}
  .proof .cell:nth-child(n+3){border-top:1px solid var(--line)}
  .hero .cue{display:none}
  .hero .ctas .btn,.final .ctas .btn{flex:1 1 100%;justify-content:center}
  .brand .wm{font-size:12px;letter-spacing:.12em}
}
@media (max-width:360px){
  .brand .wm{letter-spacing:.08em}
  .brand .mk{width:30px;height:30px}
  .lang a{min-width:30px;padding:0 4px}
}
/* short landscape phones */
@media (max-height:500px) and (orientation:landscape){
  .hero{min-height:0;padding-top:calc(96px + env(safe-area-inset-top,0px))}
  .sticky .scenebox{max-height:60vh;max-width:60vh}
  .sheet ul a{font-size:22px;padding:6px 0}
  .sheet .top{margin-bottom:16px}
}
/* browsers without aspect-ratio (Safari < 15) */
@supports not (aspect-ratio:1/1){
  .hero .vis svg,.final .vis svg,.sticky .scenebox svg{height:auto}
}
/* without JavaScript: show every step statically */
html:not(.js) .sticky-wrap{height:auto}
html:not(.js) .sticky{position:static;height:auto;align-items:start}
html:not(.js) .sticky .steps{display:grid;gap:28px;min-height:0}
html:not(.js) .sticky .step{position:static;opacity:1;transform:none}
html:not(.js) .progress,html:not(.js) .cs-ctl,html:not(.js) .sys-hint{display:none}
html:not(.js) .sc g[data-stage="1"]{opacity:0}
html:not(.js) .sc g[data-stage="4"]{opacity:1}
html:not(.js) #csSvg .k{opacity:1}
html:not(.js) #csSvg .k:not([data-k="now"]):not([data-k="band"]):not([data-k="gov"]){opacity:0}
/* print */
@media print{
  .nav,.sheet,.cue,.cs-ctl,.progress,.skip{display:none!important}
  .rv{opacity:1!important;transform:none!important}
  .sticky-wrap{height:auto}
  .sticky{position:static;height:auto}
  .scene{padding:40px 0}
}

/* ───────────── reduced motion ───────────── */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:1ms!important;animation-duration:1ms!important;animation-iteration-count:1!important}
  .rv{opacity:1;transform:none}
  .hero .cue i{animation:none;transform:none}
  .sticky-wrap{height:auto}
  .sticky{position:static;height:auto;align-items:start}
  .sticky .steps{display:grid;gap:28px;min-height:0}
  @media (min-width:981px){.sticky{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
  @media (max-width:980px){.sticky .steps{display:none}}
  .sticky .step{position:static;opacity:1;transform:none;pointer-events:auto}
  .progress{display:none}
  .sc g[data-stage]{opacity:0}
  .sc g[data-stage="4"]{opacity:1}
}