:root{--ink:#221b26;--muted:#5d5360;--paper:#fbf7f1;--line:#e6ddd2;--accent:#b5124f;--accent-d:#8c1d52;
--d1:#8c1d52;--d1l:#fbe8f0;--d2:#7a4800;--d2l:#fdf0d9;--d3:#0b6356;--d3l:#dcf1ec;--d0:#3d3540;--d0l:#efe9f1}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:var(--ink);font:17px/1.65 'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-d)}
a:hover{color:#5e0f35}
:focus-visible{outline:3px solid #1d6fd6;outline-offset:2px}
h1,h2,h3{font-family:Georgia,'Iowan Old Style','Times New Roman',serif;line-height:1.2;color:var(--ink)}
h1{font-size:clamp(1.9rem,3.4vw,2.7rem);margin:0 0 .5rem}
h2{font-size:clamp(1.45rem,2.3vw,1.85rem);margin:.35rem 0 .8rem}
p{margin:0 0 1rem}
ul,ol{margin:0 0 1rem;padding-left:1.3rem}
li{margin:.25rem 0}
code{font-family:Consolas,'Courier New',monospace;font-size:.92em;background:var(--d0l);padding:0 .25rem;border-radius:3px}
.thd-vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.thd-skip{position:absolute;left:-999px;top:0;background:#fff;padding:.6rem 1rem;z-index:10}
.thd-skip:focus{left:1rem}
.thd-wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.thd-top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
.thd-toprow{max-width:1240px;margin:0 auto;padding:.55rem 20px;display:flex;align-items:center;gap:1.2rem;justify-content:space-between}
.brandmark{display:flex;align-items:center;gap:.55rem;min-height:44px;text-decoration:none;color:var(--ink);min-width:0;flex-shrink:1}
.brandmark img{width:84px;height:auto}
.brandmark span{font:700 .95rem/1.15 Georgia,serif;white-space:nowrap}
.thd-nav{display:flex;gap:.1rem;flex-wrap:nowrap}
.thd-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:0 .5rem;font-size:.86rem;text-decoration:none;color:var(--ink);white-space:nowrap;border-bottom:3px solid transparent}
.thd-nav a[aria-current]{border-bottom-color:var(--accent);font-weight:700}
.thd-nav a:hover{color:var(--accent-d)}
.thd-crumbs{max-width:1160px;margin:.6rem auto 0;padding:0 20px;font-size:.85rem;color:var(--muted)}
.thd-crumbs a{display:inline-flex;align-items:center;min-height:44px;min-width:44px}
.thd-sep{margin:0 .2rem}
.thd-hero{background:linear-gradient(180deg,var(--paper),#fff);border-bottom:1px solid var(--line)}
.thd-herobox{max-width:1160px;margin:0 auto;padding:2.6rem 20px 1.6rem}
.thd-lede{font-size:1.12rem;color:#3d3440;max-width:62ch}
.thd-search{display:flex;gap:.5rem;max-width:760px;margin:1.1rem 0 .9rem;background:#fff;border:2px solid var(--accent-d);border-radius:10px;padding:.35rem}
.thd-search input{flex:1;min-width:0;border:0;font-size:1.05rem;padding:.75rem .8rem;min-height:48px;background:transparent;color:var(--ink)}
.thd-search input:focus{outline:none}
.thd-search:focus-within{box-shadow:0 0 0 3px #f3c6d8}
.thd-search button{border:0;background:var(--accent-d);color:#fff;font-weight:700;font-size:1rem;padding:0 1.4rem;border-radius:7px;min-height:48px;cursor:pointer}
.thd-search button:hover{background:#6f1541}
.thd-strip{font-size:.92rem;color:var(--muted);margin:0}
.thd-strip span{font-weight:700;color:var(--ink);margin-right:.3rem}
.thd-strip a{display:inline-flex;align-items:center;min-height:44px;margin-right:.9rem}
.thd-subhero{background:var(--paper);border-bottom:1px solid var(--line);padding:1.6rem 0 1.2rem}
.thd-plate{display:inline-block;font:700 .72rem/1 'Segoe UI',sans-serif;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:var(--d0);padding:.38rem .55rem;border-radius:3px}
.thd-d1{background:var(--d1)}.thd-d2{background:var(--d2)}.thd-d3{background:var(--d3)}.thd-d0{background:var(--d0)}
.thd-wall{padding:2rem 0 1.4rem}
.thd-wallh{margin-top:0}
.thd-walllede{max-width:70ch;color:#3d3440}
.thd-wallgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.thd-card{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;min-width:0}
.thd-card img{aspect-ratio:560/389;object-fit:cover;width:100%;background:var(--paper)}
.thd-card:hover{border-color:var(--accent-d)}
.thd-cardlabel{font-weight:700;padding:.55rem .7rem 0}
.thd-cardnote{font-size:.84rem;color:var(--muted);padding:.1rem .7rem 0}
.thd-cardkind{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--d3);padding:.3rem .7rem .6rem}
.thd-sec{padding:2.2rem 0;border-top:1px solid #f0e9e0}
.thd-sec.thd-tint{background:var(--paper)}
.thd-split{display:grid;grid-template-columns:55fr 45fr;gap:40px;align-items:stretch}
.thd-split.thd-flip{grid-template-columns:45fr 55fr}
.thd-split>*{min-width:0}
.thd-fig{margin:0;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:12px;display:flex;flex-direction:column;justify-content:center}
.thd-fig img{width:100%;height:auto;border-radius:4px;background:#fff}
.thd-fig figcaption{font-size:.84rem;color:var(--muted);margin-top:.6rem;line-height:1.45}
.thd-widefig{margin-top:1.1rem;padding:0;border:0;background:none}
.thd-widefig img{width:auto;max-width:100%;align-self:flex-start}
.thd-widefig figcaption{padding:0 2px}
.thd-copy h2{margin-top:.5rem}
.thd-copy>:last-child{margin-bottom:0}
.thd-more{margin-top:1.4rem;max-width:none}
.thd-more p,.thd-more ul,.thd-more ol{max-width:76ch}
.thd-band{background:transparent}
.thd-band p,.thd-band ul,.thd-band ol{max-width:76ch}
.thd-bandafter{margin-top:1.2rem}
.thd-tablewrap{overflow-x:auto;margin:0 0 1rem;max-width:100%}
.thd-table{border-collapse:collapse;width:100%;font-size:.94rem;background:#fff}
.thd-table th,.thd-table td{border:1px solid var(--line);padding:.6rem .7rem;text-align:left;vertical-align:top}
.thd-table thead th{background:var(--paper);font-size:.86rem}
.thd-table tbody th{background:#fdfaf6;font-weight:700}
.thd-table a{display:inline-flex;align-items:center;min-height:44px}
.thd-callout{border-left:5px solid var(--accent-d);background:var(--d1l);padding:.9rem 1.1rem;border-radius:0 6px 6px 0;margin:0 0 1rem;max-width:76ch}
.thd-callout.d2{border-color:var(--d2);background:var(--d2l)}
.thd-callout.d3{border-color:var(--d3);background:var(--d3l)}
.thd-faq{max-width:900px}
.thd-qa{border-bottom:1px solid var(--line);padding:.2rem 0}
.thd-qa summary{cursor:pointer;font-weight:700;min-height:44px;display:flex;align-items:center;padding:.4rem 0}
.thd-qa div{padding:0 0 .6rem}
.thd-sortform{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin:1rem 0}
.thd-sortform label{width:100%;font-weight:700;font-size:.92rem}
.thd-sortform input{flex:1;min-width:0;min-height:48px;border:2px solid var(--d0);border-radius:8px;padding:0 .8rem;font-size:1rem}
.thd-sortform button{min-height:48px;border:0;border-radius:8px;background:var(--d0);color:#fff;font-weight:700;padding:0 1.1rem;cursor:pointer}
.thd-sortout{background:var(--paper);border:1px dashed #cbbfb1;border-radius:8px;padding:.9rem 1rem}
.thd-sortout ul{margin-bottom:.5rem}
.thd-sorthost{font-size:.9rem;color:var(--muted);margin-bottom:.4rem}
.thd-nextgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem;margin:0 0 1rem;padding:0;list-style:none}
.thd-nextgrid li{margin:0}
.thd-nextgrid a{display:block;min-height:44px;padding:.6rem .8rem;border:1px solid var(--line);border-radius:6px;text-decoration:none;background:#fff}
.thd-nextgrid a b{display:block;color:var(--ink)}
.thd-nextgrid a span{font-size:.88rem;color:var(--muted)}
.thd-foot{background:#221b26;color:#efe7ef;margin-top:2rem;padding:2.2rem 0 1rem}
.thd-foot a{color:#ffd1e3;display:inline-flex;align-items:center;min-height:44px}
.thd-footgrid{max-width:1160px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem}
.thd-footname{font:700 1.05rem Georgia,serif;color:#fff}
.thd-footh{font-size:1rem;color:#fff;margin:0 0 .4rem}
.thd-footlist{list-style:none;padding:0;margin:0 0 1rem}
.thd-footlist li{margin:0}
.thd-footline{max-width:1160px;margin:1rem auto 0;padding:.8rem 20px 0;border-top:1px solid #4a3f4d;font-size:.86rem;color:#cdbfcd}
@media (max-width:1180px){.thd-nav a{padding:0 .35rem;font-size:.8rem}.brandmark span{font-size:.85rem}}
@media (max-width:1060px){.thd-toprow{flex-wrap:wrap}.thd-nav{flex-wrap:wrap;width:100%}}
@media (max-width:900px){.thd-split,.thd-split.thd-flip{grid-template-columns:1fr;gap:20px}.thd-split.thd-flip .thd-fig{order:-1}.thd-wallgrid{grid-template-columns:repeat(2,minmax(0,1fr))}.thd-footgrid{grid-template-columns:1fr}}
@media (max-width:520px){body{font-size:16px}.brandmark span{white-space:normal}.thd-search{flex-direction:column}.thd-search button{min-height:48px}.thd-nextgrid{grid-template-columns:1fr}.thd-wallgrid{gap:10px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media (prefers-color-scheme:dark){
 body{background:#17121a;color:#efe7ef}
 h1,h2,h3{color:#fff}
 a{color:#ffb3d0}
 .thd-top,.thd-card,.thd-search,.thd-table,.thd-nextgrid a{background:#1f1922;color:#efe7ef}
 .thd-nav a,.brandmark{color:#efe7ef}
 .thd-hero{background:linear-gradient(180deg,#221a25,#17121a)}
 .thd-subhero,.thd-fig,.thd-sortout,.thd-sec.thd-tint,.thd-table thead th,.thd-table tbody th{background:#221a25}
 .thd-lede,.thd-walllede{color:#d8ccd8}
 .thd-strip,.thd-crumbs,.thd-fig figcaption,.thd-cardnote,.thd-sorthost,.thd-nextgrid a span{color:#c4b6c4}
 .thd-strip span,.thd-cardlabel,.thd-nextgrid a b{color:#fff}
 .thd-cardkind{color:#7fd8c6}
 .thd-search input{color:#fff}
 .thd-callout{background:#3a1e2c;color:#f6e9f0}.thd-callout.d2{background:#3a2c14}.thd-callout.d3{background:#12352f}
 .thd-sec{border-top-color:#2c2430}
 code{background:#2c2430}
 .thd-sortform input{background:#1f1922;color:#fff;border-color:#8c7f8f}
}

/* 2026-10-18 review: paper, blue ink and editorial columns */
:root{--ink:#1d3144;--muted:#4b6373;--paper:#f0f5f8;--line:#d5e0e7;--accent:#a64b21;--accent-d:#225777;--d0:#213d50;--d0l:#e8eff4}.thd-hero{background:var(--paper);border:0}.thd-herobox{display:grid;grid-template-columns:58fr 42fr;gap:40px;align-items:center;padding-top:42px;padding-bottom:34px}.thd-herobox h1{max-width:27ch}.thd-hero .thd-fig{padding:0;background:white;border:0;transform:rotate(1deg)}.thd-hero .thd-fig figcaption{padding:12px 14px}.thd-card{border-radius:0;border:0;border-bottom:2px solid var(--line);background:var(--paper)}.thd-card img{object-fit:contain}.thd-wallgrid{gap:20px}.thd-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin:20px 0 28px}.thd-paths article{padding-top:16px;border-top:3px solid var(--line)}.thd-paths h3{font-size:24px}.thd-paths p{font-size:16px}.thd-sec{padding:44px 0}.thd-sec:nth-of-type(2n+3){background:#f6f9fa}.thd-split{align-items:start}.thd-fig{border:0;border-radius:0;background:#edf3f6;justify-content:flex-start}.thd-fig img{border-radius:0;object-fit:contain}.thd-copy{max-width:80ch}.thd-paths,.thd-nextgrid{max-width:none}.thd-wrap>.thd-copy:has(.thd-paths),.thd-wrap>.thd-copy:has(.thd-nextgrid){max-width:none}.thd-search{border-radius:0;padding:0;gap:0}.thd-search button{border-radius:0}.thd-stage .thd-wrap{display:grid;grid-template-columns:70px minmax(0,1fr);gap:8px 26px;max-width:1080px}.thd-stage-number{font:italic 38px Georgia,serif;color:var(--accent)}.thd-stage-copy{max-width:76ch}.thd-stage-images{grid-column:2}.thd-stage-images .thd-fig{margin:16px 0 22px}.thd-stage{scroll-margin-top:90px}.thd-nextgrid a{border:0;border-left:3px solid var(--line);border-radius:0;padding:16px}.thd-foot{background:#213d50}.thd-foot a{color:#c5e5f6}.thd-footline{color:#d2e1ea;border-color:#5b7383}.thd-copy dd{margin:0 0 18px}.thd-menu{display:none}.thd-nav[hidden]{display:none}
@media(max-width:900px){.thd-herobox{grid-template-columns:1fr}.thd-hero .thd-fig{max-width:650px;transform:none}.thd-paths{grid-template-columns:1fr;gap:12px}.thd-stage .thd-wrap{grid-template-columns:40px minmax(0,1fr);gap:10px}.thd-stage-images{grid-column:1/-1}.thd-stage-number{font-size:28px}}
@media(max-width:700px){.thd-menu{display:block;min-height:44px;border:1px solid var(--line);padding:0 14px;background:var(--paper);color:var(--ink);font-weight:650}.thd-toprow{gap:6px}.brandmark{flex:1}.brandmark span{font-size:13px}.thd-nav{display:block}.thd-nav a{display:flex;justify-content:flex-start;font-size:15px}.thd-herobox{padding-top:26px;gap:20px}.thd-hero .thd-fig{display:none}.thd-search{flex-direction:row}.thd-search input{font-size:16px;padding:10px}.thd-search button{padding:0 12px}.thd-wall{padding-top:26px}.thd-stage{scroll-margin-top:75px}}
@media(prefers-color-scheme:dark){:root{--ink:#ebf2f7;--muted:#b7cbd8;--paper:#1c2e3c;--line:#395364;--accent:#efaf8c;--accent-d:#b6ddef}body{background:#14232d;color:#e6eff5}.thd-top,.thd-card,.thd-search,.thd-table,.thd-nextgrid a{background:#1c2e3c}.thd-hero,.thd-subhero,.thd-fig,.thd-sortout,.thd-sec:nth-of-type(2n+3){background:#1b2c38}.thd-hero .thd-fig{background:#1b2c38}.thd-search button{background:#b6ddef;color:#132b3d}.thd-lede,.thd-walllede{color:#d2e1ea}.thd-foot{background:#0c1c28}.thd-nav a{color:#e6eff5}.thd-nextgrid a b{color:#e6eff5}.thd-sortform input{background:#14232d}}

.thd-definition-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:56px}.thd-choice{padding:0 0 0 28px;border-left:3px solid #b9d2df}.thd-choice h3{margin:0 0 10px}.thd-choice h3:not(:first-child){margin-top:24px}.thd-choice p{line-height:1.65}@media(max-width:760px){.thd-definition-grid{grid-template-columns:1fr;gap:24px}.thd-choice{padding-left:18px}}