#mb-rules{--mb-bg:light-dark(#f7f7f2,#101c26);--mb-paper:light-dark(#fff,#1b2935);--mb-ink:light-dark(#252c24,#f2f3ee);--mb-muted:light-dark(#60695d,#bac4c9);--mb-line:light-dark(#d8ddcf,#42515b);--mb-soft:light-dark(#edf1e7,#263741);--mb-green:light-dark(#466442,#95bb91);--mb-gold:light-dark(#957925,#e0c169);--mb-tint:light-dark(#faf4de,#373428);color:var(--mb-ink);background:var(--mb-bg);font:16px/1.65 Arial,Helvetica,sans-serif;border:1px solid var(--mb-line);border-radius:10px;overflow:hidden}
#mb-rules *{box-sizing:border-box}
#mb-rules h1,#mb-rules h2,#mb-rules h3,#mb-rules h4{font-family:Georgia,'Times New Roman',serif;color:var(--mb-ink);font-weight:400;line-height:1.2}
#mb-rules h1{font-size:46px;letter-spacing:-1px;margin:0 0 12px}
#mb-rules h2{font-size:30px;margin:0 0 18px}
#mb-rules h3{font-size:22px;margin:23px 0 10px}
#mb-rules h4{font-size:19px;margin:0}
#mb-rules p{margin:0 0 15px}
#mb-rules a{color:var(--mb-green);text-underline-offset:4px}

#mb-rules .mb-brand{font:700 30px Georgia,serif;white-space:nowrap}

#mb-rules .mb-main{max-width:1040px;padding:40px 34px;margin:auto}
#mb-rules .mb-eyebrow{font-size:12px;letter-spacing:1.8px;color:var(--mb-green);margin-bottom:9px;text-transform:uppercase}
#mb-rules .mb-subtitle{font:22px/1.4 Georgia,serif;color:var(--mb-muted);margin-bottom:22px}
#mb-rules .mb-intro{max-width:760px}
#mb-rules .mb-jumps{display:flex;flex-wrap:wrap;gap:6px 20px;padding:17px 0;margin:22px 0 30px;border-top:1px solid var(--mb-line);border-bottom:1px solid var(--mb-line);font-size:14px}
#mb-rules .mb-jumps a{padding:5px 0}
#mb-rules section{scroll-margin-top:20px;margin:0 0 42px}
#mb-rules .mb-copy{max-width:800px}
#mb-rules .mb-summary{background:var(--mb-paper);border:1px solid var(--mb-line);border-radius:8px;overflow:hidden}
#mb-rules .mb-contract{display:grid;grid-template-columns:155px minmax(0,1fr) 170px;gap:16px;align-items:start;padding:16px 18px;border-bottom:1px solid var(--mb-line);font-size:14px;line-height:1.5}
#mb-rules .mb-contract:last-child{border-bottom:0}
#mb-rules .mb-contract h3{font-size:20px;margin:0}
#mb-rules .mb-contract small{display:block;color:var(--mb-muted);margin-top:3px;font-size:12px}
#mb-rules .mb-points{font-weight:600}
#mb-rules .mb-note{border-left:3px solid var(--mb-gold);padding:12px 17px;background:var(--mb-tint);margin:18px 0;font-size:15px}
#mb-rules .mb-figure{margin:24px 0;background:var(--mb-paper);border:1px solid var(--mb-line);border-radius:9px;overflow:hidden}
#mb-rules .mb-figure-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:18px 20px;border-bottom:1px solid var(--mb-line)}
#mb-rules .mb-figure-head h3{margin:0;font-size:22px}
#mb-rules .mb-tag{font-size:13px;color:var(--mb-green);background:var(--mb-soft);padding:4px 10px;border-radius:4px}
#mb-rules .mb-sequence{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
#mb-rules .mb-step{padding:18px 14px;border-right:1px solid var(--mb-line);min-width:0}
#mb-rules .mb-step:last-child{border:0}
#mb-rules .mb-step-title{display:flex;align-items:center;gap:9px;margin-bottom:15px}
#mb-rules .mb-number{background:var(--mb-soft);color:var(--mb-green);border:1px solid var(--mb-line);width:28px;height:28px;display:grid;place-items:center;border-radius:50%;font-size:13px}
#mb-rules .mb-board{background:var(--mb-bg);border:1px solid var(--mb-line);border-radius:6px;padding:9px;display:grid;gap:6px}
#mb-rules .mb-suit-row{display:flex;align-items:center;gap:5px;min-height:37px}
#mb-rules .mb-suit{font-size:21px;width:19px;text-align:center;flex-shrink:0}
#mb-rules .mb-unopened{font-size:12px;color:var(--mb-muted);border:1px dashed var(--mb-line);border-radius:4px;padding:4px 8px}
#mb-rules .mb-playing-card{position:relative;display:inline-flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;width:34px;height:44px;padding:3px 4px;background:#fff;color:#131313;border:1px solid #8a8c88;border-radius:4px;font:600 16px/17px Georgia,serif;flex:0 0 auto;box-shadow:0 1px 2px #0001}
#mb-rules .mb-playing-card.mb-red{color:#bc2723}
#mb-rules .mb-playing-card.mb-legal{border:2px solid #a3862d;padding:2px 3px;background:#fffdf4}
#mb-rules .mb-playing-card.mb-chosen{outline:2px solid #54734e;outline-offset:1px}
#mb-rules .mb-board .mb-playing-card{width:30px;height:37px;font-size:14px;line-height:14px}
#mb-rules .mb-hand-label{font-size:12px;color:var(--mb-muted);margin:13px 0 7px;min-height:20px}
#mb-rules .mb-hand{display:grid;grid-template-columns:repeat(7,34px);gap:5px;justify-content:center;min-height:93px}
#mb-rules .mb-move-label{color:var(--mb-green);font-size:13px;text-align:center;min-height:26px;margin:7px 0 2px}
#mb-rules .mb-pass{color:var(--mb-muted)}
#mb-rules .mb-caption{margin:14px 0 0!important;font:18px/1.35 Georgia,serif;min-height:49px}
#mb-rules .mb-figure-foot{padding:13px 20px;border-top:1px solid var(--mb-line);font-size:13px;color:var(--mb-muted)}
#mb-rules .mb-figure-foot p{margin:0}
#mb-rules .mb-legal-key{display:inline-block;width:11px;height:13px;border:2px solid #a3862d;background:#fffdf4;vertical-align:-2px;margin-right:4px}
#mb-rules .mb-trick-pair{display:grid;grid-template-columns:1fr 1fr}
#mb-rules .mb-trick-panel{padding:20px;border-right:1px solid var(--mb-line);text-align:center}
#mb-rules .mb-trick-panel:last-child{border:0}
#mb-rules .mb-diamond{position:relative;height:300px;max-width:330px;margin:12px auto 0}
#mb-rules .mb-seat-card{position:absolute;display:flex;align-items:center;flex-direction:column;width:105px;gap:5px;font-size:12px;line-height:1.4}
#mb-rules .mb-seat-card .mb-playing-card{width:49px;height:65px;font-size:23px;line-height:24px;padding:4px 6px}
#mb-rules .mb-seat-card.mb-n{top:0;left:50%;transform:translateX(-50%)}
#mb-rules .mb-seat-card.mb-s{bottom:0;left:50%;transform:translateX(-50%)}
#mb-rules .mb-seat-card.mb-w{left:0;top:105px}
#mb-rules .mb-seat-card.mb-e{right:0;top:105px}
#mb-rules .mb-winner{outline:3px solid #a3862d;outline-offset:2px;background:#fff9df!important}
#mb-rules .mb-win-label{color:var(--mb-green);font-weight:600}
#mb-rules .mb-center-label{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);font-size:12px;color:var(--mb-muted)}
#mb-rules .mb-result{margin:14px 0 0!important;font:19px Georgia,serif}
#mb-rules .mb-order{font-size:14px;color:var(--mb-muted);margin-top:8px}
#mb-rules .mb-bullets{padding-left:22px;max-width:800px}
#mb-rules .mb-bullets li{padding-left:3px;margin:8px 0}
#mb-rules .mb-score-wrap{overflow-x:auto}
#mb-rules table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.5;background:var(--mb-paper)}
#mb-rules th,#mb-rules td{padding:12px 14px;border-bottom:1px solid var(--mb-line);text-align:left}
#mb-rules th{font-weight:600;background:var(--mb-soft)}
#mb-rules td:not(:first-child),#mb-rules th:not(:first-child){font-variant-numeric:tabular-nums;text-align:right}
#mb-rules caption{text-align:left;font:20px Georgia,serif;margin:18px 0 10px}
#mb-rules .mb-footer{padding-top:22px;border-top:1px solid var(--mb-line);display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--mb-muted)}
#mb-rules details{margin:16px 0;border:1px solid var(--mb-line);border-radius:6px;background:var(--mb-paper);padding:12px 16px}
#mb-rules summary{cursor:pointer;color:var(--mb-green);min-height:28px}
#mb-rules details p{margin-top:12px}
#mb-rules[data-layout="stacked"] .mb-sequence{grid-template-columns:1fr}
#mb-rules[data-layout="stacked"] .mb-step{border-right:0;border-bottom:1px solid var(--mb-line)}
#mb-rules[data-layout="stacked"] .mb-board{max-width:370px;margin:auto}
#mb-rules[data-layout="stacked"] .mb-hand{min-height:0}
@media(max-width:760px){#mb-rules .mb-main{padding:28px 20px}

#mb-rules h1{font-size:37px}
#mb-rules .mb-sequence,#mb-rules .mb-trick-pair{grid-template-columns:1fr}
#mb-rules .mb-step,#mb-rules .mb-trick-panel{border-right:0;border-bottom:1px solid var(--mb-line)}
#mb-rules .mb-step{padding:20px}
#mb-rules .mb-board{max-width:390px;margin:auto}
#mb-rules .mb-hand{min-height:0}
#mb-rules .mb-caption{min-height:0;text-align:center}
#mb-rules .mb-contract{grid-template-columns:120px minmax(0,1fr)}
#mb-rules .mb-points{grid-column:2}
#mb-rules .mb-contract small{font-size:13px}
}
@media(max-width:390px){#mb-rules .mb-main{padding:24px 12px}
#mb-rules h1{font-size:33px}

#mb-rules .mb-contract{grid-template-columns:1fr;gap:7px;padding:14px}
#mb-rules .mb-points{grid-column:auto}
#mb-rules .mb-step{padding:14px 8px}
#mb-rules .mb-figure-head{padding:15px 12px}
#mb-rules .mb-hand{grid-template-columns:repeat(7,30px);gap:4px}
#mb-rules .mb-hand .mb-playing-card{width:30px}
#mb-rules .mb-trick-panel{padding:18px 8px}
#mb-rules .mb-seat-card{width:89px}
#mb-rules th,#mb-rules td{padding:10px 7px;font-size:13px}}

#mb-rules details.mb-tutorial{margin:0 0 42px;padding:0;border:0;border-radius:0;background:transparent}
#mb-rules .mb-tutorial>summary{font:400 30px/1.2 Georgia,serif;color:var(--mb-ink);padding:12px 0;min-height:44px}
#mb-rules .mb-tutorial-body{padding-top:10px}
#mb-rules #mb-trumps-rules{scroll-margin-top:20px}
#mb-rules #mb-dominoes{margin-top:28px;margin-bottom:0;padding-top:4px}
#mb-rules .mb-inline-card{display:inline-block;white-space:nowrap;color:#131313;background:#fff;border:1px solid #d0d2cc;border-radius:3px;padding:0 3px;line-height:1.35}
#mb-rules .mb-inline-card.mb-red{color:#bc2723}
/* Site integration; approved tutorial layout and wording are retained. */
body.rules-page{margin:0;display:block;background:#f7f7f2;height:auto;overflow:auto}
body.rules-page.dark-mode{background:#101c26}
#mb-rules{border:0;border-radius:0;min-height:100vh;color-scheme:light}
body.dark-mode #mb-rules{color-scheme:dark}
#mb-rules .mb-brand{text-decoration:none;color:var(--mb-ink)}

#mb-rules button{font:inherit;color:var(--mb-ink);background:var(--mb-paper);border:1px solid var(--mb-line);border-radius:6px;padding:8px 12px;min-height:44px;cursor:pointer}
#mb-rules a:focus-visible,#mb-rules summary:focus-visible,#mb-rules button:focus-visible{outline:3px solid var(--mb-gold);outline-offset:3px}

/* Approved redesign: section navigation beside the complete original guide. */
body.rules-page #mb-rules { overflow:visible; font-size:14px; }
#mb-rules .mb-main { max-width:1200px; padding:24px 22px 40px; }
#mb-rules .rules-header { display:flex; align-items:flex-end; margin-bottom:17px; }
#mb-rules .rules-intro { max-width:800px; }
#mb-rules .rules-header .mb-intro { max-width:800px; }
#mb-rules .rules-header h1 { font-size:34px; }
#mb-rules .rules-header .mb-subtitle { font:14px/1.5 Arial,Helvetica,sans-serif; }
#mb-rules .rules-intro p { color:var(--mb-muted); font-size:14px; line-height:1.6; margin-top:7px; }
#mb-rules .rules-shell { display:grid; grid-template-columns:205px minmax(0,1fr); gap:18px; align-items:start; }
#mb-rules .rules-sidebar { position:sticky; top:24px; padding:10px; display:grid; gap:3px; background:var(--site-panel); border:1px solid var(--site-line); border-radius:9px; }
#mb-rules .rules-sidebar h4 { font:11px Arial,sans-serif; letter-spacing:1px; text-transform:uppercase; padding:8px 10px; }
#mb-rules .rules-sidebar a { display:flex; align-items:center; min-height:44px; padding:10px 0; font:14px Arial,sans-serif; color:var(--mb-ink); text-decoration:none; border-radius:7px; }
#mb-rules .rules-sidebar a:hover { background:var(--site-soft); color:var(--site-action); }
#mb-rules .rules-content { display:block; min-width:0; container-type:inline-size; }
#mb-rules .rules-content>section,#mb-rules .rules-content>details.mb-tutorial { padding:20px; background:var(--site-panel); border:1px solid var(--site-line); border-radius:9px; margin:0 0 16px; }
#mb-rules .rules-content>section>h2,#mb-rules .rules-content>details.mb-tutorial>summary { font-size:24px; }
#mb-rules .mb-contract { grid-template-columns:125px minmax(0,1fr) 140px; gap:12px; }
#mb-rules .guide-jump { display:none; }
@container(max-width:900px){
 #mb-rules .mb-sequence,#mb-rules .mb-trick-pair { grid-template-columns:1fr; }
 #mb-rules .mb-step,#mb-rules .mb-trick-panel { border-right:0; border-bottom:1px solid var(--mb-line); }
 #mb-rules .mb-step:last-child,#mb-rules .mb-trick-panel:last-child { border-bottom:0; }
 #mb-rules .mb-board { max-width:390px; margin:auto; }
 #mb-rules .mb-caption { text-align:center; min-height:0; }
 #mb-rules .mb-hand { grid-template-columns:repeat(7,34px); min-height:0; }
}
@media(max-width:760px){
 #mb-rules .mb-main { padding:20px 16px 32px; }
 #mb-rules .rules-shell { display:block; }
 #mb-rules .rules-sidebar { display:none; }
 #mb-rules .guide-jump { display:block; margin:16px 0; }
 #mb-rules .guide-jump select { width:100%; padding:12px; font:16px Arial,sans-serif; color:var(--site-ink); background:var(--site-panel); border:1px solid var(--site-line); border-radius:7px; }
}
@media(max-width:600px){
 #mb-rules .rules-content>section,#mb-rules .rules-content>details.mb-tutorial { padding:14px; }
 #mb-rules .mb-contract { grid-template-columns:1fr; }
 #mb-rules .mb-points { grid-column:auto; }
 #mb-rules .mb-hand { grid-template-columns:repeat(7,30px); gap:4px; }
 #mb-rules .mb-hand .mb-playing-card { width:30px; }
 #mb-rules .mb-trick-panel { padding:16px 4px; }
 #mb-rules .mb-seat-card { width:85px; }
}

#mb-rules .mode-guide{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}#mb-rules .mode-guide>div{padding:18px;border:1px solid var(--mb-border,#d9ddd7);border-radius:12px}#mb-rules .mode-guide h3{margin-top:0}@media(max-width:620px){#mb-rules .mode-guide{grid-template-columns:1fr}}

/* One section menu shared by desktop and mobile. */
.rules-sections{border:0;background:transparent;margin:0;padding:0}
.rules-sections>summary{cursor:pointer;font-weight:600;padding:10px 0}
.rules-sections>a{display:block}
@media(max-width:900px){#mb-rules .rules-sidebar{display:block;position:static;width:auto}.rules-shell{display:block}.rules-sidebar .rules-sections{margin:0 0 16px;border:1px solid var(--site-line);padding:0 12px;border-radius:8px}}
:where([id^="mb-"]){scroll-margin-top:24px}