@font-face{font-family:'Oswald';src:url('/fonts/Oswald-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'Oswald';src:url('/fonts/Oswald-600.woff2') format('woff2');font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:'Oswald';src:url('/fonts/Oswald-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Lato';src:url('/fonts/Lato-400.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Lato';src:url('/fonts/Lato-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Source Serif 4';src:url('/fonts/SourceSerif4-Variable.woff2') format('woff2');font-weight:200 900;font-style:normal;font-display:swap}
@font-face{font-family:'Source Serif 4';src:url('/fonts/SourceSerif4-Variable-Italic.woff2') format('woff2');font-weight:200 900;font-style:italic;font-display:swap}
:root{--paper:#F3EDE2;--paper-raised:#FBF7EF;--ink:#1D1C1A;--ink-muted:#5C574F;--rule:#1D1C1A;--rule-soft:#D8CFBF;--board-light:#FBF7EF;--board-dark:#B3A58F;--press-black:#141414;--workbook-red:#A12929;--workbook-red-deep:#5E1414;--tower-navy:#1E3A5F;--tower-navy-deep:#0F1F33;--piece-green:#2F5D3A;--piece-green-deep:#18311E;--pattern-purple:#4B2C6B;--pattern-purple-deep:#26153A;--classic-black:#0E0B0B;--classic-cream:#F1E9D7;--classic-gold:#D5C79D;--classic-muted:#A39C8C;--pocket-beginner:#00A8A6;--pocket-intermediate:#FF813E;--pocket-advanced:#FF63A9;--pocket-expert:#9659BA;--pocket-endgames:#3382E0;--on-accent:#F6F0E6;--focus:#1E3A5F;--band-w:24px;--strip-h:64px;--logo-filter:none;color-scheme:light}
/* Sixty-Four Press / Pencil & Pawn — component styles.
   Every value reads a token from tokens.json (as a CSS custom property) with the
   paper-theme value as fallback. Radius is 0 throughout. */

/* Fonts: Oswald, Source Serif 4, Lato (SIL OFL), shipped as files in fonts/ and declared in tokens.json. */

.pp {
  --pp-paper: var(--paper, #F3EDE2);
  --pp-raised: var(--paper-raised, #FBF7EF);
  --pp-ink: var(--ink, #1D1C1A);
  --pp-muted: var(--ink-muted, #5C574F);
  --pp-rule: var(--rule, #1D1C1A);
  --pp-rule-soft: var(--rule-soft, #D8CFBF);
  --pp-on-accent: var(--on-accent, #F6F0E6);
  --pp-accent: var(--ink, #1D1C1A);
  --pp-display: "Oswald", "Arial Narrow", sans-serif;
  --pp-serif: "Source Serif 4", "TeX Gyre Pagella", Palatino, Georgia, serif;
  --pp-notation: "Lato", "Helvetica Neue", Arial, sans-serif;
  background: var(--pp-paper);
  color: var(--pp-ink);
  font: 400 18px/28px var(--pp-serif);
  -webkit-font-smoothing: antialiased;
}
.pp *, .pp *::before, .pp *::after { box-sizing: border-box; }

/* Accent scopes: set once on a page or block; everything inside follows. */
.pp-accent-workbook { --pp-accent: var(--workbook-red, #A12929); }
.pp-accent-tower    { --pp-accent: var(--tower-navy, #1E3A5F); }
.pp-accent-piece    { --pp-accent: var(--piece-green, #2F5D3A); }
.pp-accent-pattern  { --pp-accent: var(--pattern-purple, #4B2C6B); }

/* Type */
.pp-kicker { font: 500 14px/20px var(--pp-display); letter-spacing: .3em; text-transform: uppercase; color: var(--pp-accent); margin: 0 0 8px; }
.pp-title { font-family: var(--pp-display); font-weight: 700; text-transform: uppercase; line-height: .95; margin: 0; letter-spacing: 0; }
.pp-title span { display: block; }
.pp-title span + span { color: var(--pp-accent); }
.pp-title--xl { font-size: clamp(56px, 9vw, 96px); }
.pp-title--l  { font-size: clamp(44px, 6vw, 64px); }
.pp-h2 { font: 600 36px/1.05 var(--pp-display); text-transform: uppercase; margin: 0 0 24px; }
.pp-h3 { font: 600 24px/1.15 var(--pp-display); text-transform: uppercase; margin: 0 0 12px; }
.pp-label { font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; }
.pp-lead { font: 400 22px/32px var(--pp-serif); margin: 0 0 24px; max-width: 680px; }
.pp-body { max-width: 680px; }
.pp-body p { margin: 0 0 16px; }
.pp-small { font: 400 15px/23px var(--pp-serif); color: var(--pp-muted); }
.pp-quote { font: italic 400 26px/36px var(--pp-serif); margin: 0; max-width: 680px; }
.pp-move { font: 700 17px/26px var(--pp-notation); }
.pp-meta { font: 400 13px/18px var(--pp-notation); letter-spacing: .02em; color: var(--pp-muted); }

/* Rule */
.pp-rule { border: 0; border-top: 1px solid var(--pp-rule); margin: 0; }

/* Links and buttons */
.pp-link { color: var(--pp-ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.pp-link:hover { color: var(--pp-accent); }
.pp-btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 48px; padding: 0 24px; border: 1px solid var(--pp-ink); border-radius: 0;
  background: var(--pp-ink); color: var(--pp-paper);
  font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
}
.pp-btn:hover { background: var(--pp-accent); border-color: var(--pp-accent); color: var(--pp-on-accent); }
.pp-btn--accent { background: var(--pp-accent); border-color: var(--pp-accent); color: var(--pp-on-accent); }
.pp-btn--accent:hover { background: var(--pp-ink); border-color: var(--pp-ink); color: var(--pp-paper); }
.pp-btn--line { background: transparent; color: var(--pp-ink); }
.pp-btn--line:hover { background: var(--pp-ink); color: var(--pp-paper); border-color: var(--pp-ink); }
.pp-btn:focus-visible, .pp-link:focus-visible, .pp-input:focus-visible { outline: 2px solid var(--focus, #1E3A5F); outline-offset: 2px; }

/* Accent band and strip (from the cover's left band and foot strip) */
.pp-banded { border-left: var(--band-w, 24px) solid var(--pp-accent); padding-left: 40px; }
.pp-strip {
  background: var(--pp-accent); color: var(--pp-on-accent); min-height: var(--strip-h, 64px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 40px;
  font: 500 15px/1 var(--pp-display); letter-spacing: .24em; text-transform: uppercase;
}

/* Book tile: cover + title + one meta line. No box. */
.pp-book { display: block; color: inherit; text-decoration: none; }
.pp-book img { display: block; width: 100%; height: auto; border-radius: var(--radius-cover, 2px); box-shadow: var(--shadow-book, 0 1px 1px rgba(29,28,26,.18), 0 12px 24px -8px rgba(29,28,26,.35)); }
.pp-book__title { font: 600 18px/1.15 var(--pp-display); text-transform: uppercase; margin: 16px 0 4px; }
.pp-book:hover .pp-book__title { text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.pp-shelf { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 40px 24px; align-items: end; }

/* Diagram */
.pp-diagram { margin: 0; max-width: 360px; }
.pp-diagram img { display: block; width: 100%; height: auto; }
.pp-diagram figcaption { display: flex; justify-content: space-between; gap: 12px; margin-top: 10px; font: 400 13px/18px var(--pp-notation); color: var(--pp-muted); }
.pp-diagram figcaption b { font-weight: 700; color: var(--pp-ink); }

/* Puzzle block: diagram, write-in lines, solution */
.pp-puzzle { display: grid; grid-template-columns: minmax(200px, 360px) minmax(220px, 1fr); gap: 40px; align-items: start; }
.pp-writein { margin: 0 0 16px; padding: 0; list-style: none; counter-reset: mv; }
.pp-writein li { border-bottom: 1px solid var(--pp-rule-soft); height: 40px; display: flex; align-items: flex-end; padding-bottom: 6px; font: 400 13px var(--pp-notation); color: var(--pp-muted); }
.pp-solution summary { cursor: pointer; font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; list-style: none; text-decoration: underline; text-underline-offset: 4px; }
.pp-solution summary::-webkit-details-marker { display: none; }
.pp-solution[open] summary { margin-bottom: 8px; }
@media (max-width: 640px) { .pp-puzzle { grid-template-columns: 1fr; } }

/* Spec table */
.pp-spec { width: 100%; max-width: 680px; border-collapse: collapse; }
.pp-spec th, .pp-spec td { text-align: left; vertical-align: top; padding: 12px 0; border-bottom: 1px solid var(--pp-rule); }
.pp-spec tr:first-child th, .pp-spec tr:first-child td { border-top: 1px solid var(--pp-rule); }
.pp-spec th { width: 40%; font: 500 13px/24px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; font-weight: 500; }
.pp-spec td { font: 400 16px/24px var(--pp-notation); }

/* Buy row */
.pp-buy { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.pp-buy__note { flex-basis: 100%; margin-top: 4px; }

/* Header */
.pp-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 40px; border-bottom: 1px solid var(--pp-rule); }
.pp-header img { height: 40px; width: auto; display: block; filter: var(--logo-filter, none); }
.pp-nav { display: flex; gap: 28px; flex-wrap: wrap; }
.pp-nav a { color: var(--pp-ink); text-decoration: none; font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; padding: 6px 0; border-bottom: 1px solid transparent; }
.pp-nav a:hover, .pp-nav a[aria-current] { border-bottom-color: var(--pp-ink); }

/* Footer */
.pp-footer__body { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding: 48px 40px; background: var(--pp-ink); color: var(--pp-paper); }
.pp-footer__body a { color: var(--pp-paper); }
.pp-footer__body h4 { font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; margin: 0 0 12px; }
.pp-footer__body ul { list-style: none; margin: 0; padding: 0; font: 400 15px/28px var(--pp-serif); }
@media (max-width: 720px) { .pp-footer__body { grid-template-columns: 1fr; } }

/* Newsletter */
.pp-signup { display: flex; flex-wrap: wrap; gap: 0; max-width: 520px; }
.pp-input { flex: 1 1 240px; min-height: 48px; padding: 0 16px; border: 1px solid var(--pp-ink); border-right: 0; border-radius: 0; background: var(--pp-raised); color: var(--pp-ink); font: 400 17px var(--pp-serif); }
.pp-signup .pp-btn { flex: 0 0 auto; }
@media (max-width: 480px) { .pp-input { border-right: 1px solid var(--pp-ink); } .pp-signup .pp-btn { flex: 1 1 100%; justify-content: center; margin-top: 8px; } }

/* Pocket band tag */
.pp-band { display: inline-block; padding: 6px 12px; font: 500 13px/18px var(--pp-display); letter-spacing: .2em; text-transform: uppercase; color: #141414; }
.pp-band--beginner { background: var(--pocket-beginner, #00A8A6); }
.pp-band--intermediate { background: var(--pocket-intermediate, #FF813E); }
.pp-band--advanced { background: var(--pocket-advanced, #FF63A9); }
.pp-band--expert { background: var(--pocket-expert, #9659BA); color: #FFFFFF; }
.pp-band--endgames { background: var(--pocket-endgames, #3382E0); }

/* Numbered feature list (instead of icon tiles) */
.pp-points { list-style: none; margin: 0; padding: 0; counter-reset: pt; max-width: 680px; }
.pp-points li { counter-increment: pt; display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid var(--pp-rule); }
.pp-points li:last-child { border-bottom: 1px solid var(--pp-rule); }
.pp-points li::before { content: counter(pt, decimal-leading-zero); font: 600 24px/28px var(--pp-display); color: var(--pp-accent); }

/* Layout: the collection site. Paper ground, Oswald display, covers and real diagrams as the only pictures;
   one accent per page (ink on the home page, the book's own colour on its page). */

body{margin:0;background:var(--paper);color:var(--ink)}
.wrap{max-width:1240px;margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
img{max-width:100%;display:block}
.sr{position:absolute;left:-9999px}
.hdr{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-block:18px;position:relative}
.hdr::after{content:'';position:absolute;left:clamp(16px,4vw,40px);right:clamp(16px,4vw,40px);bottom:0;border-bottom:1px solid var(--rule)}
.hdr .logo{height:46px;width:auto;filter:var(--logo-filter)}
.hero{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(32px,5vw,72px);align-items:center;padding-block:clamp(48px,7vw,96px)}
.hero .pp-title{font-size:clamp(44px,5.4vw,72px)}
.ink2{color:var(--ink)!important;-webkit-text-stroke:0}
.hero-img{width:100%}
.sec{padding-block:clamp(56px,8vw,104px);border-top:1px solid var(--rule)}
.two-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:end;margin-bottom:48px}
.series{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0}
.ser{display:block;text-decoration:none;color:inherit;padding:0 40px 8px 0}
.ser + .ser{padding:0 0 8px 40px;border-left:1px solid var(--rule)}
.ser-img{aspect-ratio:3/2;display:flex;align-items:center;justify-content:center;margin-bottom:24px;overflow:hidden}
.ser-img img{width:100%;height:100%;object-fit:contain}
.ser:hover .pp-link{color:var(--ink);text-decoration-thickness:2px}
.levels{width:100%;border-collapse:collapse}
.levels td{padding:16px 24px 16px 0;border-top:1px solid var(--rule);vertical-align:middle;font:400 17px/1.45 var(--pp-serif)}
.levels tr:last-child td{border-bottom:1px solid var(--rule)}
.levels td:first-child{width:200px}
.levels .r{width:140px;font:700 15px var(--pp-notation);font-variant-numeric:tabular-nums;white-space:nowrap}
.how{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:clamp(32px,5vw,72px);align-items:center}
.sheet{max-width:520px}
.sheet-row{display:grid;grid-template-columns:32px minmax(0,1fr) minmax(0,1fr) 72px;gap:16px;align-items:end;padding-top:14px}
.sheet-row .n{font:700 15px/1 var(--pp-notation);padding-bottom:9px}
.sheet-row input{border:0;border-bottom:1px solid var(--ink-muted);background:transparent;color:var(--ink);font:700 20px/1.2 var(--pp-notation);padding:6px 2px;min-width:0;border-radius:0}
.sheet-row input::placeholder{color:var(--rule-soft);font-weight:400;font-size:14px;letter-spacing:.04em}
.sheet-row input:focus{outline:none;border-bottom:2px solid var(--ink)}
.sheet-row input.ok{border-bottom-color:#2F5D3A} .sheet-row input.no{border-bottom-color:#A12929}
.sheet-row .mark{font:400 13px/1.2 var(--pp-notation);color:var(--ink-muted);padding-bottom:9px}
.feedback{margin-top:16px;min-height:28px}
.answer{margin-top:8px;padding-top:16px;border-top:1px solid var(--rule)}
.news{background:var(--paper-raised);border-top:0;padding-inline:clamp(24px,4vw,56px);margin-bottom:96px}
.divider{background:var(--paper-raised);border-block:1px solid var(--rule);padding-block:14px;text-align:center;margin-top:0}
.wb{display:grid;grid-template-columns:220px minmax(0,1fr) minmax(0,.9fr);gap:clamp(24px,4vw,56px);padding-block:48px;border-top:1px solid var(--rule);align-items:start}
.wb:last-child{border-bottom:1px solid var(--rule);margin-bottom:96px}
.wb img{box-shadow:var(--shadow-book)}
.wb .pp-title{font-size:clamp(36px,4vw,52px)}
.wb ul{margin:0;padding:0;list-style:none}
.wb li{padding:8px 0;border-top:1px solid var(--rule-soft);font:400 16px/1.45 var(--pp-serif)}
.book{padding-block:clamp(32px,5vw,64px)}
.book-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(32px,5vw,72px);align-items:center}
.book-text{padding-block:16px}
.book-3d{width:min(100%,460px);margin-inline:auto}
.pp-footer__body{grid-template-columns:2fr 1fr 1fr}
.pp-footer__body img{height:44px;width:auto;filter:invert(1)}
@media (max-width:860px){
 .hero,.two-head,.series,.how,.book-grid,.wb{grid-template-columns:minmax(0,1fr)}
 .ser,.ser + .ser{padding:24px 0;border-left:0;border-top:1px solid var(--rule)}
 .wb img{max-width:200px}
 .levels td:first-child{width:auto} .levels td{display:block;border-top:0;padding:4px 0} .levels tr{display:block;padding:12px 0;border-top:1px solid var(--rule)}
}

/* ---- v2: navigation, dropdown, tabs, pages ---- */
.page[hidden]{display:none!important}
.hdr{z-index:20}
.nav2{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.nav2 > a,.dd > button{font:500 13px/18px var(--pp-display);letter-spacing:.2em;text-transform:uppercase;color:var(--ink);text-decoration:none;padding:6px 0;border:0;border-bottom:1px solid transparent;background:none;cursor:pointer}
.nav2 > a:hover,.nav2 > a.on,.dd > button.on,.dd > button:hover{border-bottom-color:var(--ink)}
.dd{position:relative}
.dd > button::after{content:'';display:inline-block;width:6px;height:6px;margin-left:10px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-3px) rotate(45deg)}
.dd-menu{position:absolute;top:calc(100% + 14px);left:-24px;background:var(--paper-raised);border:1px solid var(--ink);display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:0;min-width:520px;z-index:30;box-shadow:0 18px 30px -18px rgba(29,28,26,.4)}
.dd-col{padding:20px 24px 22px}
.dd-col + .dd-col{border-left:1px solid var(--rule-soft)}
.dd-col h4{margin:0 0 10px;font:500 12px/16px var(--pp-display);letter-spacing:.2em;text-transform:uppercase}
.dd-col h4 a{color:var(--ink)}
.dd-col ul{list-style:none;margin:0;padding:0}
.dd-col li a{display:flex;align-items:center;gap:10px;padding:7px 0;font:400 16px/1.3 var(--pp-serif);color:var(--ink);text-decoration:none}
.dd-col li a:hover{text-decoration:underline;text-underline-offset:3px}
.sw{width:10px;height:14px;flex:0 0 auto}
.tabs{display:flex;gap:0;border-bottom:1px solid var(--rule);margin-top:28px;flex-wrap:wrap}
.tabs a{padding:12px 20px 11px;font:500 13px/18px var(--pp-display);letter-spacing:.2em;text-transform:uppercase;color:var(--ink-muted);text-decoration:none;border:1px solid transparent;border-bottom:0;margin-bottom:-1px}
.tabs a.on{color:var(--ink);border-color:var(--rule);background:var(--paper)}
.tabs a:hover{color:var(--ink)}
.crumbs{margin:28px 0 0;font:400 13px/18px var(--pp-notation);color:var(--ink-muted)}
.crumbs a{color:var(--ink-muted)}
.bookpage .book-grid{padding-block:clamp(32px,5vw,56px)}
.bar-pocket{border-left:var(--band-w) solid var(--bar)}
.bookpage .pp-banded{padding-left:clamp(24px,3vw,40px)}
.facts{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,5vw,72px)}
.forwho p{max-width:520px}
.shelf3{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:40px 28px;align-items:end}
.pk-intro{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(32px,5vw,72px);align-items:center;padding-block:clamp(32px,5vw,64px)}
.levels a{color:var(--ink)}
.teaser{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:clamp(32px,5vw,72px);align-items:center}
.faq dt{font:600 20px/1.3 var(--pp-display);text-transform:uppercase;margin:28px 0 8px}
.faq dd{margin:0;max-width:680px}
.rowlink{color:inherit;text-decoration:none}
.levels th{text-align:left;padding:0 24px 10px 0;font:500 12px/16px var(--pp-display);letter-spacing:.18em;text-transform:uppercase;color:var(--ink-muted)}
.levels .r{font:400 14px/1.45 var(--pp-notation)!important;width:220px!important;white-space:normal!important}
.lv-meta{display:block;margin-top:6px;font:400 14px/1.4 var(--pp-notation);color:var(--ink-muted)}
@media (max-width:860px){
 .dd-menu{position:fixed;left:16px;right:16px;top:auto;min-width:0;grid-template-columns:1fr}
 .dd-col + .dd-col{border-left:0;border-top:1px solid var(--rule-soft)}
 .facts,.pk-intro,.teaser{grid-template-columns:minmax(0,1fr)}
}

/* ---- built site additions ---- */
.skip{position:absolute;left:-9999px;top:0;z-index:50;background:var(--ink);color:var(--paper);padding:12px 16px}
.skip:focus{left:16px}
.nav2 > a[aria-current]{border-bottom-color:var(--ink)}
details.dd > summary{list-style:none;font:500 13px/18px var(--pp-display);letter-spacing:.2em;text-transform:uppercase;color:var(--ink);padding:6px 0;border-bottom:1px solid transparent;cursor:pointer}
details.dd > summary::-webkit-details-marker{display:none}
details.dd > summary::after{content:'';display:inline-block;width:6px;height:6px;margin-left:10px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-3px) rotate(45deg)}
details.dd > summary:hover,details.dd > summary.on{border-bottom-color:var(--ink)}
details.dd:not([open]) .dd-menu{display:none}
.pp-btn--soon,.pp-btn--soon:hover{background:transparent;color:var(--ink-muted);border:1px dashed var(--ink-muted);cursor:default}
.pp-btn--soon small{font:inherit;letter-spacing:.12em;margin-left:10px;text-transform:lowercase}
.buy-note{margin:12px 0 0}
.pp-footer__body a{text-decoration:none}
.pp-footer__body a:hover{text-decoration:underline;text-underline-offset:3px}
.pp-footer__body .pp-small{color:inherit}
.credit{margin-top:12px}
.soon-box{max-width:520px}
.notfound{padding-block:72px 120px}
.hero-img,.ser-img img,.how img,.book-3d,.pk-intro img,.teaser img{height:auto}
.pocket-title{font-size:clamp(44px,8vw,96px)}
.pp :where(img){height:auto}
.series{grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:56px 64px}
.ser,.ser + .ser{padding:0 0 8px;border:0}
@media (min-width:861px){.dd-menu{grid-template-columns:repeat(var(--cols,2),minmax(220px,1fr));min-width:calc(var(--cols,2) * 260px)}}
.levels td:first-child{width:170px}
.levels .r{width:300px!important}
.levels .gl{display:block}
.levels .nr{white-space:nowrap}
.inside-note{margin-top:16px}
.shelf3{align-items:start}
.sheet-row{grid-template-columns:32px minmax(0,1fr) minmax(0,1fr)}
.sheet-row input:disabled{border-bottom-style:dotted;color:var(--ink-muted)}
.sheet-row input:disabled::placeholder{color:var(--ink-muted);font-weight:700;font-size:20px}
.marks{font:400 14px/1.4 var(--pp-notation);color:var(--ink-muted);min-height:20px;margin-top:10px}
@media (max-width:860px){
 .pp-strip{padding:0 16px;font-size:12px;letter-spacing:.18em}
 .pp-footer__body{padding:40px 16px}
 .bookpage .pp-banded{padding-left:16px;border-left-width:12px}
 .pp-title--xl{font-size:clamp(44px,13vw,96px)}
 .pocket-title{font-size:clamp(36px,11vw,96px)}
 .levels .r{width:auto!important;margin-bottom:4px}
 .levels td:first-child{width:auto}
 .levels thead{display:none}  /* rows stack on phones, so the column headings no longer sit over anything */
 .nav2{gap:18px}
 .tabs a{padding:10px 12px 9px;font-size:12px;letter-spacing:.14em}
 .pp-puzzle{grid-template-columns:minmax(0,1fr)}
 .book-3d{width:min(70%,300px)}
 .sheet-row{grid-template-columns:24px minmax(0,1fr) minmax(0,1fr);gap:12px}
 .dd-menu{top:auto;margin-top:14px}
}
@media (max-width:720px){.pp-footer__body{grid-template-columns:minmax(0,1fr)}.pp-footer__body li{overflow-wrap:anywhere}}
/* phones: tap targets at least 44px tall, small print no smaller than 14px, running text 16px */
@media (max-width:860px){
 .nav2{gap:0 22px}
 .nav2 > a,details.dd > summary{padding:13px 0}
 .dd-col li a{padding:12px 0}
 .dd-col h4 a{display:inline-block;padding:12px 0}
 .tabs a{padding:13px 12px 12px}
 .pp-footer__body ul{font-size:16px}
 .pp-footer__body li a{display:inline-block;padding:8px 0}
 .pp-footer__body .pp-small{font-size:16px;line-height:24px}
 .levels td:first-child a{display:inline-block;padding:10px 0}
 .levels tr:last-child td{border-bottom:0}
 .levels tr:last-child{border-bottom:1px solid var(--rule)}
 .levels .r{font-size:16px!important;line-height:1.5!important}
 .pp-meta,.pp-diagram figcaption,.crumbs{font-size:14px;line-height:20px}
 .crumbs a{display:inline-block;padding:12px 0}
 .sheet-row input{min-height:44px;font-size:18px}
 .pp-spec td{font-size:16px}
 .ser{padding-bottom:0}
}
@media (max-width:420px){.pp-btn{padding:0 16px}.pp-buy .pp-btn{width:100%;justify-content:center}}
/* Tighter vertical rhythm (4 Oct 2026: the draft's gaps read as empty on screen). */
.sec{padding-block:clamp(36px,4.5vw,64px)}
.hero{padding-block:clamp(32px,4.5vw,64px)}
.two-head{margin-bottom:28px}
.ser-img{aspect-ratio:12/5;align-items:flex-end;margin-bottom:20px}
.pp-footer__body{padding-block:40px}