:root{
 --paper:#FAF6EE; --paper2:#F0E7D3; --card:#FFFDF8;
 --ink:#21312A; --ink2:#43544B;
 --pine:#1E5B45; --pine-d:#123A2C; --pine-x:#0D2C21;
 --amber:#C07F13; --amber-t:#8A5C07; --amber-l:#F2C069;
 --line:#DCCFB2; --ok:#1E5B45;
 --serif:'Iowan Old Style','Palatino Linotype',Palatino,Georgia,serif;
 --sans:-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.2;color:var(--ink);margin:0 0 .5em}
h1{font-size:2.35rem} h2{font-size:1.72rem} h3{font-size:1.28rem} h4{font-size:1.08rem}
p{margin:0 0 1em}
a{color:var(--pine);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--pine-d)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
section{padding:52px 0}
section.alt{background:var(--paper2)}
section.dark{background:var(--pine-d);color:#F2ECDB}
section.hero{background:var(--pine-x);color:#F2ECDB;padding:46px 0 60px}
section.dark h2,section.dark h3,section.hero h1,section.hero h2,section.hero h3{color:#F8F2E2}
section.dark p,section.hero p{color:#E9E1CB}
section.dark a,section.hero a{color:var(--amber-l)}
.tagline{font-family:var(--serif);font-style:italic;font-size:1.14rem;color:var(--amber-l);margin:0 0 10px}
section.hero .tagline{color:var(--amber-l)}
.small{font-size:.88rem;color:var(--ink2)}
section.dark .small,section.hero .small{color:#CFC5A6}
.btn{display:inline-block;background:var(--pine);color:#FFFDF8;padding:13px 26px;border-radius:8px;
 font-weight:700;text-decoration:none;border:2px solid var(--pine);font-size:1.02rem;cursor:pointer;font-family:var(--sans)}
.btn:hover{background:var(--pine-d);color:#FFFDF8}
.btn.ghost{background:transparent;color:var(--pine)}
.btn.ghost:hover{background:var(--paper2);color:var(--pine-d)}
.btn.big{font-size:1.13rem;padding:15px 32px}
/* kit-visibility pack band — light band in brand palette, directly under hero / at page top */
.pack-band{background:var(--paper2);padding:24px 0;border-top:3px solid var(--amber);border-bottom:1px solid var(--line)}
.pack-band-in{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
section.pack-band h2{color:var(--ink);font-size:1.45rem;margin:0 0 6px}
section.pack-band p{color:var(--ink);margin:0}
section.pack-band a.btn{color:#FFFDF8}
/* header */
header.top{background:var(--paper);border-bottom:3px solid var(--pine);padding:14px 0 10px}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
a.lockup{display:flex;align-items:center;gap:10px;text-decoration:none}
.lockup .mark{flex:none}
.lockup .word{font-family:var(--serif);font-weight:700;font-size:1.42rem;letter-spacing:.2px;white-space:nowrap}
.lockup .w1{color:#21312A}.lockup .w2{color:#1E5B45}.lockup .w3{color:#8A5C07}
nav.main{display:flex;gap:4px;flex-wrap:wrap}
nav.main a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.96rem;padding:8px 11px;border-radius:6px}
nav.main a:hover{background:var(--paper2);color:var(--pine-d)}
/* footer */
footer.site{background:var(--pine-x);color:#DAD2B8;padding:44px 0 30px;margin-top:0}
footer.site a{color:var(--amber-l)}
footer.site p{color:#DAD2B8}
.logo-plate{display:inline-block;background:var(--paper);border-radius:10px;padding:10px 16px;margin-bottom:16px}
footer.site .cols{display:flex;gap:36px;flex-wrap:wrap;margin:10px 0 18px}
footer.site .cols div{min-width:170px}
footer.site h4{color:#F8F2E2;font-size:1rem;margin-bottom:8px}
footer.site ul{list-style:none;margin:0;padding:0}
footer.site li{margin:5px 0}
footer.site .legal{border-top:1px solid #2A4A3B;padding-top:16px;font-size:.86rem}
/* components — scoped rules carry specificity (0,2,x) inside dark/hero so the
   cascade is won by design, not by luck; audited in tests/audit.py */
.card,.lock-panel,.result,.notice,.tool-panel{background:var(--card);border:1px solid var(--line);
 border-radius:12px;padding:24px 26px;color:var(--ink)}
section .card h3,section .lock-panel h3,section .result h3,section .result h4,section .tool-panel h3{color:var(--ink)}
section .card p,section .lock-panel p,section .result p,section .notice p,section .tool-panel p{color:var(--ink)}
section.dark .card h3,section.hero .card h3,section.dark .lock-panel h3,section.hero .lock-panel h3,
section.dark .result h3,section.hero .result h3,section.dark .result h4,section.hero .result h4,
section.dark .tool-panel h3,section.hero .tool-panel h3{color:var(--ink)}
section.dark .card p,section.hero .card p,section.dark .lock-panel p,section.hero .lock-panel p,
section.dark .result p,section.hero .result p,section.dark .notice p,section.hero .notice p,
section.dark .tool-panel p,section.hero .tool-panel p{color:var(--ink)}
section .card a.btn,section .lock-panel a.btn,section .result a.btn,section .notice a.btn,
section.dark .card a.btn,section.hero .card a.btn,section.dark .lock-panel a.btn,section.hero .lock-panel a.btn,
section.dark .result a.btn,section.hero .result a.btn{color:#FFFDF8}
section .card a,section .lock-panel a,section .result a,section .notice a{color:var(--pine)}
.card h3,.lock-panel h3{margin-top:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:22px 0}
.door{display:block;text-decoration:none}
.door:hover{border-color:var(--pine)}
.door .go{color:var(--pine);font-weight:700}
section.dark .door .go,section.hero .door .go{color:var(--pine)}
.lock-panel{border:2px solid var(--pine);background:var(--card)}
.lock-panel .price{font-family:var(--serif);font-size:1.5rem;color:var(--ink)}
.notice{border-left:6px solid var(--amber)}
.result{margin-top:26px}
.edu-line{font-weight:600;background:var(--paper2);border-radius:8px;padding:10px 14px}
section .result .edu-line,section.dark .result .edu-line,section.hero .result .edu-line{color:var(--ink)}
ol.steps{list-style:none;margin:18px 0;padding:0;counter-reset:step}
ol.steps li.step{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line)}
.step-n{flex:none;width:38px;height:38px;border-radius:50%;background:var(--pine);color:#FFFDF8;
 font-family:var(--serif);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:1.05rem}
li.step.done .step-n{background:var(--amber)}
.step-body h4{margin:2px 0 6px;color:var(--ink)}
section .result .step-body h4,section.dark .result .step-body h4,section.hero .result .step-body h4{color:var(--ink)}
.step-numbers{font-weight:600}
section .result .step-why{color:var(--ink2)}
.chips a.chip{display:inline-block;background:var(--paper2);border:1px solid var(--line);border-radius:20px;
 padding:4px 12px;margin:2px 2px 2px 0;font-size:.85rem;text-decoration:none;color:var(--pine-d);font-weight:600}
.chips a.chip:hover{border-color:var(--pine)}
.assume{background:var(--paper2);border-radius:8px;padding:14px 18px;margin:16px 0}
section .result .assume h4{color:var(--ink)}
section .result .note,section .assume p{color:var(--ink)}
.note{background:#FBF3DC;border-left:5px solid var(--amber);padding:12px 16px;border-radius:6px}
table.ptable,table.dtable{width:100%;border-collapse:collapse;margin:16px 0;font-size:.97rem}
table.ptable th,table.ptable td,table.dtable th,table.dtable td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
table.ptable th,table.dtable th{background:var(--pine);color:#FFFDF8;font-family:var(--serif)}
table.dtable td.num,table.ptable td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tablewrap{overflow-x:auto}
/* sequencer form */
.tool-panel form .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin-bottom:6px}
label.fl{display:block;font-weight:600;font-size:.94rem;margin:8px 0 4px;color:var(--ink)}
input.fi,select.fi{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:8px;
 font-size:1rem;font-family:var(--sans);background:#FFF;color:var(--ink)}
input.fi:focus,select.fi:focus{outline:2px solid var(--pine);outline-offset:1px}
.hint{font-size:.84rem;color:var(--ink2);margin:2px 0 6px}
section .tool-panel .hint{color:var(--ink2)}
.checks label{display:block;font-weight:500;margin:5px 0}
.verify{font-size:.85rem;color:var(--ink2);border-top:1px dashed var(--line);padding-top:10px;margin-top:14px}
section .tool-panel .verify{color:var(--ink2)}
/* decoder cards */
.term-card{border:1px solid var(--line);border-radius:12px;padding:20px 22px;background:var(--card)}
.term-card .hundred{background:var(--paper2);border-radius:8px;padding:10px 14px;margin-top:10px}
.term-card .hundred strong{color:var(--pine-d)}
.az{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.az a{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:7px 12px;text-decoration:none;font-weight:600}
.az a:hover{border-color:var(--pine)}
ul.tight li{margin:7px 0}
.kicker{font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:.78rem;color:var(--amber-t)}
section.dark .kicker,section.hero .kicker{color:var(--amber-l)}
.verdict{font-family:var(--serif);font-size:1.3rem;line-height:1.45}
@media (max-width:760px){
 h1{font-size:1.85rem} h2{font-size:1.45rem}
 section{padding:38px 0}
 .head-in{flex-direction:column;align-items:flex-start}
 nav.main{display:flex;flex-wrap:wrap;width:100%;justify-content:space-between}
 nav.main a{padding:8px 7px;font-size:.92rem}
 .card,.lock-panel,.result,.notice,.tool-panel{padding:19px 18px}
 .pack-band-in{flex-direction:column;align-items:flex-start}
 table.ptable,table.dtable{font-size:.9rem}
}
@media print{
 header.top,footer.site,nav.main,.plan-cta,.no-print{display:none!important}
 body{background:#FFF}
 section{padding:10px 0}
 .result,.card,.lock-panel{border:none}
}