/* ProofKit shared page shell — 2026 tokens (matches index.html). */
:root{
  --paper:#F5F6F8; --ink:#0B0E14; --card:#FFFFFF; --line:#E4E7EC; --muted:#5C6472;
  --stamp:#0E9F6E; --stamp-dim:#0A8A5F; --warn:#C0492F;
  --r-ctl:10px; --r-box:18px;
  --ease:cubic-bezier(.16,1,.3,1);
  --shadow:0 1px 2px rgba(11,14,20,.05), 0 8px 24px -8px rgba(11,14,20,.10);
  --shadow-lg:0 1px 2px rgba(11,14,20,.05), 0 24px 60px -20px rgba(11,14,20,.18);
  --sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:20px;--sp-6:24px;--sp-7:32px;--sp-8:40px;--sp-9:48px;--sp-10:64px;--sp-11:80px;
  --fs-2:13px;--fs-3:14px;--fs-4:15px;--fs-5:16px;--fs-6:18px;--fs-7:20px;--fs-8:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,sans-serif;font-size:var(--fs-5);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:Inter,system-ui,sans-serif;font-weight:700;letter-spacing:-.03em;text-wrap:balance;margin:0}
h1{font-size:clamp(32px,4.6vw,54px);line-height:1.05}
h2{font-size:clamp(24px,3vw,34px);line-height:1.12}
h3{font-size:var(--fs-7)}
p{margin:0 0 var(--sp-4)}
a{color:inherit}
.wrap{max-width:min(1160px,100% - 32px);margin:0 auto;padding-inline:clamp(var(--sp-4),4vw,var(--sp-6))}
:focus-visible{outline:3px solid var(--stamp);outline-offset:3px;border-radius:var(--r-ctl)}
::selection{background:var(--stamp);color:#fff}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

header{position:sticky;top:0;z-index:50;background:rgba(245,246,248,.82);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:var(--sp-4)}
.brand{display:flex;align-items:center;gap:var(--sp-3);text-decoration:none;font-weight:700;font-size:17px;letter-spacing:-.02em}
.brand img{width:28px;height:28px}
nav{display:flex;align-items:center;gap:var(--sp-5);font-size:var(--fs-3);color:var(--muted)}
nav a{text-decoration:none;position:relative;padding:2px 0}
nav a:not(.btn)::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:1.5px;background:var(--stamp);transition:right .35s var(--ease)}
nav a:not(.btn):hover{color:var(--ink)}
nav a:not(.btn):hover::after{right:0}
nav a[aria-current="page"]{color:var(--ink);font-weight:600}
nav a[aria-current="page"]::after{right:0}
#menuBtn{display:none;background:none;border:1px solid var(--line);border-radius:var(--r-ctl);width:40px;height:40px;cursor:pointer;position:relative;flex:none}
#menuBtn span{position:absolute;left:10px;right:10px;height:2px;background:var(--ink);transition:transform .3s var(--ease)}
#menuBtn span:first-child{top:13px}
#menuBtn span:last-child{bottom:13px}
#menuBtn[aria-expanded="true"] span:first-child{transform:translateY(5.5px) rotate(45deg)}
#menuBtn[aria-expanded="true"] span:last-child{transform:translateY(-5.5px) rotate(-45deg)}
#mnav{display:none}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);background:var(--ink);color:#fff;border:1.5px solid var(--ink);border-radius:999px;padding:13px 22px;font-size:var(--fs-4);font-weight:600;text-decoration:none;cursor:pointer;position:relative;overflow:hidden;touch-action:manipulation;transition:transform .18s var(--ease),box-shadow .25s var(--ease)}
.btn::before{content:'';position:absolute;inset:0;background:var(--stamp);transform:translateY(101%);transition:transform .35s var(--ease)}
.btn span{position:relative;z-index:1}
.btn:hover{color:#fff;box-shadow:0 6px 20px -8px rgba(14,159,110,.7)}
.btn:hover::before{transform:translateY(0)}
.btn:active{transform:scale(.97)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost::before{background:var(--card)}
.btn-ghost:hover{color:var(--ink);border-color:var(--ink);box-shadow:none}
.btn-sm{padding:8px 15px;font-size:var(--fs-3)}
.btn-stamp{background:var(--stamp);border-color:var(--stamp)}
.btn-stamp:hover{color:#fff}

main{display:block}
section{padding:clamp(var(--sp-9),5vw,var(--sp-11)) 0}
.phero{padding:clamp(var(--sp-9),6vw,72px) 0 var(--sp-8);background:radial-gradient(72% 58% at 12% -8%, rgba(14,159,110,.13), transparent 62%),var(--paper)}
.eyebrow{display:inline-flex;align-items:center;gap:var(--sp-2);font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:var(--sp-4)}
.phero .lede{font-size:var(--fs-6);color:var(--muted);max-width:38em;margin:var(--sp-4) 0 var(--sp-6)}
.cta{display:flex;gap:var(--sp-3);flex-wrap:wrap;align-items:center}
.micro{font-size:var(--fs-2);color:var(--muted)}
.sec-head{max-width:44em;margin-bottom:var(--sp-7)}
.sec-head p{color:var(--muted);margin:10px 0 0;font-size:var(--fs-6)}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-box);padding:22px}
.card h3{margin-bottom:6px}
.card p{color:var(--muted);font-size:var(--fs-4);margin:0}
.card .k{display:block;font-size:28px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-bottom:4px}
.list{list-style:none;margin:0;padding:0}
.list li{padding:8px 0 8px 26px;position:relative;color:var(--muted);font-size:var(--fs-4)}
.list li::before{content:'';position:absolute;left:4px;top:15px;width:9px;height:5px;border-left:2.5px solid var(--stamp);border-bottom:2.5px solid var(--stamp);transform:rotate(-45deg)}
.list li b{color:var(--ink)}

.note{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--stamp);border-radius:var(--r-box);padding:18px 20px;font-size:var(--fs-4);color:var(--muted)}
.note b{color:var(--ink)}

details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-box);margin-bottom:9px;overflow:hidden}
summary{cursor:pointer;padding:15px 18px;font-weight:600;font-size:var(--fs-6);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:background .2s}
summary:hover{background:#F1F3F6}
summary::-webkit-details-marker{display:none}
summary::after{content:'+';font-family:Inter;font-size:21px;color:var(--muted);transition:transform .3s var(--ease);flex:none}
details[open] summary::after{transform:rotate(45deg)}
details .ans{padding:0 18px 17px;color:var(--muted);font-size:var(--fs-4)}

.final{background:radial-gradient(110% 150% at 88% -10%, rgba(14,159,110,.28), transparent 55%),var(--ink);color:#fff;border-radius:var(--r-box);padding:clamp(28px,5vw,46px);position:relative;overflow:hidden}
.final h2{color:#fff;margin-bottom:10px}
.final p{color:#AEB4BF;margin:0 0 22px;max-width:34em}
.final .btn{background:var(--stamp);border-color:var(--stamp)}
.final .btn::before{background:#fff}
.final .btn:hover{color:var(--ink)}
.final .btn-ghost{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}
.final .btn-ghost::before{background:rgba(255,255,255,.1)}
.final .btn-ghost:hover{color:#fff;border-color:#fff}

footer{border-top:1px solid var(--line);margin-top:56px;background:var(--card)}
footer .wrap{display:flex;gap:var(--sp-4);justify-content:space-between;flex-wrap:wrap;padding-top:var(--sp-6);padding-bottom:var(--sp-6);font-size:var(--fs-3);color:var(--muted)}
.foot-grid{align-items:flex-start}
.foot-left{display:flex;flex-direction:column;gap:10px;max-width:300px}
.status{display:inline-flex;align-items:center;gap:8px;font-size:var(--fs-2)}
.status i{width:8px;height:8px;border-radius:50%;background:#C98D1F;flex:none}
.status.ok i{background:var(--stamp);animation:pulse 2.4s ease-in-out infinite}
.status em{font-style:normal}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.75)}}
.fnav{display:flex;gap:var(--sp-7)}
.fnav b{display:block;font-size:11px;font-weight:700;letter-spacing:.06em;margin-bottom:8px;color:var(--ink)}
.fnav a{display:block;padding:4px 0;font-size:var(--fs-3)}
footer a{color:var(--muted);text-decoration:none} footer a:hover{color:var(--ink)}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

table.cmp{width:100%;border-collapse:collapse;font-size:var(--fs-4);background:var(--card);border:1px solid var(--line);border-radius:var(--r-box);overflow:hidden;min-width:560px}
.cmp th,.cmp td{padding:11px 14px;border-top:1px solid var(--line);text-align:left}
.cmp th{background:#F1F3F6;font-weight:600;font-size:var(--fs-3)}
.cmp td.num{font-variant-numeric:tabular-nums}
.table-scroll{overflow-x:auto}

@media(max-width:960px){.grid-3,.grid-2{grid-template-columns:1fr}.fnav{gap:var(--sp-5)}}
@media(max-width:640px){
  header .wrap{height:58px}
  nav a:not(.btn){display:none}
  #menuBtn{display:block}
  #mnav{display:block;position:absolute;top:100%;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);padding:6px 20px 14px;opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .25s var(--ease),transform .25s var(--ease)}
  #mnav.open{opacity:1;transform:none;pointer-events:auto}
  #mnav a{display:block;padding:11px 2px;text-decoration:none;font-weight:600;border-top:1px solid var(--line);color:var(--ink)}
  #mnav a:first-child{border-top:0}
  #mnav a[aria-current="page"]{color:var(--stamp)}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .status.ok i{animation:none}
}
h1,h2,h3{text-wrap:balance}
.reveal.in{opacity:1;transform:none}

/* ===== 2026 UI overhaul: shared controls, cards, chips ===== */
:root{--r-md:16px;--hoverline:#C2C9D4;--easeq:cubic-bezier(.16,1,.3,1)}
input:not([type="checkbox"]):not([type="radio"]),textarea,select{padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .16s var(--easeq),box-shadow .16s var(--easeq)}
input:not([type="checkbox"]):not([type="radio"]):hover,textarea:hover,select:hover{border-color:var(--hoverline)}
input:not([type="checkbox"]):not([type="radio"]):focus,textarea:focus,select:focus{outline:none;border-color:var(--stamp);box-shadow:0 0 0 4px rgba(14,159,110,.13)}
select{appearance:none;-webkit-appearance:none;background:#FFF9 url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' stroke='%233C4350' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") calc(100% - 14px) center no-repeat;padding-right:38px;cursor:pointer}
label{font-weight:600;font-size:13px;color:#3C4350}
.card{transition:transform .25s var(--easeq),box-shadow .25s var(--easeq)}
.card:hover{transform:translateY(-2px);box-shadow:0 1px 2px rgba(11,14,20,.05),0 20px 48px -22px rgba(11,14,20,.22)}
.card,table.cmp,details,.note{border-radius:var(--r-box)}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.04em;padding:4px 11px;border-radius:999px;background:#EAF7F1;color:#0A6B47;border:1px solid #C9E9DB}
.chip.lock{background:#FDF3EC;color:#8A4A15;border-color:#F0D9C5}
.btn:focus-visible{box-shadow:0 0 0 4px rgba(14,159,110,.35);outline:none}
.cmp tbody tr:hover{background:#FAFBFC}
.steps{display:flex;gap:10px;flex-wrap:wrap}
.step{display:flex;align-items:center;gap:9px;padding:9px 14px;border:1px solid var(--line);border-radius:999px;background:var(--card);font-size:var(--fs-3);color:var(--muted)}
.step b{color:var(--ink)}
.step i{font-style:normal;width:22px;height:22px;border-radius:999px;background:var(--ink);color:#fff;font-size:11.5px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;flex:none}
.step.done i{background:var(--stamp)}
[hidden]{display:none!important}

/* ===== component system v2: deeper controls, consistent brand green/ink ===== */
:root{--font-mono:ui-monospace,Menlo,Consolas,monospace;--stamp-dim:#0A8A5F}
input:not([type="checkbox"]):not([type="radio"]),textarea,select{border-radius:14px;padding:13px 16px;font-size:15px;line-height:1.5;background:#fff;border:1.5px solid #D9DEE7;box-shadow:inset 0 1px 2px rgba(11,14,20,.045);transition:box-shadow .18s var(--easeq),border-color .18s var(--easeq)}
input:not([type="checkbox"]):not([type="radio"])::placeholder,textarea::placeholder{color:#9AA3B1}
textarea{resize:vertical}
input[type="checkbox"]{appearance:none;-webkit-appearance:none;width:20px;height:20px;border:1.5px solid #D9DEE7;border-radius:6px;background:#fff;cursor:pointer;position:relative;box-shadow:none;transition:background .15s,border-color .15s}
input[type="checkbox"]:checked{background:var(--stamp);border-color:var(--stamp)}
input[type="checkbox"]:checked::after{content:"";position:absolute;left:6px;top:2.5px;width:5px;height:10px;border:2px solid #fff;border-top:0;border-left:0;transform:rotate(42deg);border-radius:1px}
input[type="checkbox"]:hover{border-color:#B9C2CF}
select{height:48px;padding-right:38px}background-repeat:no-repeat;background-position:calc(100% - 14px) center;
.btn{border-radius:14px;box-shadow:0 1px 2px rgba(11,14,20,.12)}
.btn:not(.btn-ghost){background:linear-gradient(180deg,#11AB76,#0A8A5F);border-color:#0A8A5F}
.btn:not(.btn-ghost):hover{box-shadow:0 10px 24px -10px rgba(10,138,95,.55);transform:translateY(-1px)}
.btn:not(.btn-ghost):active{transform:translateY(0) scale(.98)}
.btn-ghost{background:#fff;box-shadow:0 1px 2px rgba(11,14,20,.06)}
.btn-ghost:hover{border-color:#0A8A5F;color:#0A6B47;box-shadow:0 6px 16px -8px rgba(10,138,95,.25);transform:translateY(-1px)}
.final .btn:not(.btn-ghost)::before{content:none}
details{border-radius:var(--r-box)}
details .ans{padding-bottom:18px}
summary{border-radius:var(--r-box)}
.note{border-radius:16px}
.dropzone{border:2px dashed #C4CCD7;border-radius:14px;background:#FBFCFD;padding:22px 18px;transition:border-color .2s var(--easeq),background .2s var(--easeq)}
.dropzone:hover,.dropzone:focus-visible{border-color:var(--stamp);background:#F3FAF7;outline:2px solid rgba(14,159,110,.35)}
.card{border-color:#EAECF2}
code,pre{font-family:var(--font-mono)}