/* BTDP Whitepaper v2.0 page — same brand system as the home page (home-v2/styles.css). Prints as a light A4 document. */
:root{--bg:#060c1d;--panel:#0e1a3b;--line:#213563;--line-2:#2c4378;--text:#e9eefb;--text-2:#c3cde6;--muted:#8d9bc0;--gold:#f3c24f;--blue:#3ea6ff;--font:Calibri,Carlito,"Segoe UI","Helvetica Neue",Arial,system-ui,sans-serif;--mono:"Cascadia Mono",Consolas,"DejaVu Sans Mono",monospace;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:radial-gradient(900px 560px at 85% 0%,#12255480,transparent 70%),var(--bg);color:var(--text);font:17px/1.65 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--gold);text-decoration:none}a:hover{text-decoration:underline}
img{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--gold);outline-offset:4px;border-radius:3px}
.wp-wrap{width:min(860px,calc(100% - 32px));margin-inline:auto}
.wp-top{position:sticky;top:0;z-index:10;background:#060c1df0;backdrop-filter:blur(14px);border-bottom:1px solid #213563a0}
.wp-top-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.wp-brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);line-height:1.15}
.wp-brand:hover{text-decoration:none}
.wp-brand img{width:38px;height:38px;border-radius:7px;object-fit:contain}
.wp-brand strong{font-size:19px;letter-spacing:.06em;font-weight:800}
.wp-brand .dot{color:var(--gold)}
.wp-brand small{display:block;margin-top:4px;font-size:9px;letter-spacing:.13em;color:var(--muted);font-weight:650}
.wp-nav{display:flex;align-items:center;gap:18px;font-size:14px;font-weight:600}
.wp-nav a{color:var(--text-2)}
.wp-nav a.wp-pdf{color:#151405;background:var(--gold);border-radius:6px;padding:8px 14px}
.wp-nav a.wp-pdf:hover{background:#ffcf62;text-decoration:none}
.wp-main{padding-block:44px 64px}
.wp-cover{border:1px solid #f3c24f50;border-radius:12px;padding:36px 34px;background:radial-gradient(600px 300px at 100% 100%,#f3c24f0c,transparent),linear-gradient(120deg,#12224980,#0a143060)}
.wp-kicker{margin:0;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--gold)}
.wp-cover h1{margin:12px 0 0;font-size:clamp(32px,5vw,46px);line-height:1.12;letter-spacing:-.03em}
.wp-lead{margin:14px 0 0;font-size:19px;color:var(--text-2);max-width:640px}
.wp-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 24px;margin:26px 0 0}
.wp-facts div{border-top:1px solid var(--line);padding-top:8px}
.wp-facts dt{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700}
.wp-facts dd{margin:2px 0 0;font-size:15px}
.mono{font-family:var(--mono);font-size:.86em;word-break:break-all}
.wp-note{margin:22px 0 0;font-size:14px;color:var(--muted)}
.wp-toc{margin-top:30px;border:1px solid var(--line);border-radius:10px;padding:20px 26px;background:#0a143070}
.wp-toc h2{margin:0;font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.wp-toc ol{margin:12px 0 0;padding-left:22px;columns:2;column-gap:32px;font-size:15px}
.wp-toc li{break-inside:avoid;padding:2px 0}
.wp-toc a{color:var(--text-2)}
.wp-main section[id]{margin-top:44px}
.wp-main h2{display:flex;align-items:baseline;gap:12px;margin:0 0 14px;font-size:28px;letter-spacing:-.02em;line-height:1.2}
.wp-main h2>span{font:14px/1 var(--mono);color:var(--gold);border:1px solid #f3c24f60;border-radius:4px;padding:5px 7px}
.wp-main h3{margin:24px 0 8px;font-size:19px;color:var(--gold);font-weight:700}
.wp-main p{margin:0 0 12px;color:var(--text-2)}
.wp-main ul,.wp-main ol{margin:0 0 12px;padding-left:22px;color:var(--text-2)}
.wp-main li{margin:6px 0}
.wp-main strong{color:var(--text)}
.wp-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:6px 0 16px}
.wp-flow div{position:relative;border:1px solid var(--line-2);border-radius:8px;padding:14px;background:var(--panel)}
.wp-flow div:first-child{border-color:#f3c24f70}
.wp-flow strong{display:block;font-size:15px}
.wp-flow span{display:block;margin-top:4px;font-size:13px;color:var(--muted);line-height:1.5}
.wp-steps li{padding-left:4px}
.wp-table{overflow-x:auto;margin:8px 0 14px;border:1px solid var(--line);border-radius:8px}
.wp-table table{width:100%;border-collapse:collapse;font-size:15px}
.wp-table th,.wp-table td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.wp-table tr:last-child th,.wp-table tr:last-child td{border-bottom:0}
.wp-table thead th{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:#0e1a3b}
.wp-table tbody th{color:var(--muted);font-weight:600;width:34%}
.wp-table td{color:var(--text-2)}
.wp-links{list-style:none;padding-left:0!important}
.wp-disclaimer{margin-top:18px!important;font-size:13px;color:var(--muted)!important;border-top:1px solid var(--line);padding-top:14px}
.wp-foot{border-top:1px solid var(--line);background:#050b19;padding:22px 0;font-size:13px;color:var(--muted)}
@media(max-width:700px){
  body{font-size:16px}
  .wp-nav{gap:12px;font-size:13px}.wp-nav a:not(.wp-pdf){display:none}
  .wp-cover{padding:26px 20px}.wp-lead{font-size:17px}
  .wp-facts{grid-template-columns:1fr}
  .wp-toc ol{columns:1}
  .wp-flow{grid-template-columns:1fr 1fr}
  .wp-main h2{font-size:24px}
  .wp-table th,.wp-table td{padding:8px 10px;font-size:14px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Print / PDF: light A4 document in the same layout. */
@page{size:A4;margin:16mm 16mm 18mm}
@media print{
  :root{--text:#0b1430;--text-2:#26324f;--muted:#5a6788;--line:#cfd6e6;--line-2:#b8c2d9;--panel:#f4f6fb;--gold:#9a6b00;color-scheme:light}
  body{background:#fff;font-size:11pt;line-height:1.5}
  .wp-top{position:static;background:#fff;border-bottom:2px solid #f3c24f;backdrop-filter:none}
  .wp-nav{display:none}
  .wp-wrap{width:100%}
  .wp-main{padding-block:14px 0}
  .wp-cover{background:#fff;border:1px solid #e3c06a;break-inside:avoid}
  .wp-toc{background:#fff;break-inside:avoid}
  .wp-main section[id]{margin-top:22px}
  .wp-main h2{font-size:17pt;break-after:avoid}
  .wp-main h3{break-after:avoid}
  .wp-table,.wp-flow div,.wp-main li{break-inside:avoid}
  .wp-table thead th{background:#eef1f8}
  .wp-flow{grid-template-columns:repeat(4,minmax(0,1fr))}
  a{color:#0b1430}
  .wp-foot{background:#fff;border-top:1px solid #cfd6e6;padding:10px 0}
}
.wp-main .wp-toc h2{display:block;margin:0;font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.wp-main .wp-toc li{margin:0}