/* ===================================================================
   USTaxZH — 美国报税与海外资产申报
   Design tokens: ink / paper / ledger-green / brass
   Signature device: the "ledger line" — double-rule dividers and
   greenbar row striping, drawn from classic accountant's ledger paper.
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+SC:wght@400;600&display=swap');

:root{
  --ink:        #1C2B24;
  --ink-soft:   #45564C;
  --paper:      #F6F5EF;
  --paper-2:    #FFFFFF;
  --ledger:     #2F5D48;
  --ledger-tint:#E4ECE6;
  --ledger-dark:#1F4536;
  --brass:      #A9812E;
  --brass-tint: #F3E9D2;
  --rule:       #CBC8BA;
  --alert:      #8C3B2E;

  --font-display: 'Fraunces', 'Noto Serif SC', serif;
  --font-body:    'Source Serif 4', 'Noto Serif SC', serif;
  --font-mono:    'IBM Plex Mono', 'Noto Sans SC', monospace;

  --measure: 68ch;
  --radius: 3px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth; overflow-x:clip;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
img{max-width:100%;display:block;}
a{color:var(--ledger-dark);}
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:2px;
}
h1,h2,h3{
  font-family:var(--font-display);
  font-weight:500;
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:0;
}
h1{font-size:clamp(2rem,4.2vw,3.4rem); font-weight:400;}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem);}
h3{font-size:1.2rem;}
p{margin:0 0 1.1em;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--ledger-dark);
}
.container{
  max-width:1080px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding-block:64px;}
.section-tight{padding-block:40px;}

/* ---- signature: ledger double-rule divider ---- */
.ledger-rule{
  height:6px;
  border-top:1.5px solid var(--ink);
  border-bottom:.5px solid var(--ink);
  margin:0;
}
.ledger-rule.thin{
  height:4px;
  border-top:1px solid var(--rule);
  border-bottom:.5px solid var(--rule);
}

/* ---- header ---- */
.site-header{
  background:var(--paper-2);
  position:sticky; top:0; z-index:40;
  border-bottom:1px solid var(--rule);
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 24px;
  max-width:1080px; margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--ink);
  min-width:0;
}
.brand-logo{
  width:40px; height:40px; border-radius:8px; flex:0 0 auto;
}
.brand-text{display:flex; flex-direction:column; min-width:0;}
.brand-mark{
  font-family:var(--font-mono); font-weight:500; font-size:1.05rem; letter-spacing:.04em;
}
.brand-tagline{
  font-family:var(--font-mono); font-size:.68rem; color:var(--ink-soft); letter-spacing:.03em;
  overflow-wrap:anywhere;
}
.nav-links{
  display:flex; gap:28px; list-style:none; margin:0; padding:0;
  font-family:var(--font-mono); font-size:.85rem;
}
.nav-links a{
  text-decoration:none; color:var(--ink); padding:6px 0; position:relative;
}
.nav-links a:hover{color:var(--ledger-dark);}
.nav-links a.active{color:var(--ledger-dark); border-bottom:2px solid var(--brass);}
.nav-toggle{
  display:none; background:none; border:1px solid var(--ink); border-radius:var(--radius);
  width:40px; height:36px; cursor:pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:18px; height:2px; background:var(--ink); margin:4px auto;
}

/* ---- hero ---- */
.hero{
  padding-block:72px 48px;
  display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center;
}
.hero h1{margin-bottom:.4em;}
.hero .lede{font-size:1.15rem; color:var(--ink-soft); max-width:52ch;}
.hero-cta, .hero-actions{display:flex; gap:14px; margin-top:28px; flex-wrap:wrap;}
.language-links{
  display:flex; flex-wrap:wrap; gap:10px; align-items:center;
  margin-top:18px; font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft);
}
.language-links span{color:var(--ledger-dark);}
.language-links a{text-decoration:none; border-bottom:1px solid var(--rule);}

/* 首页 hero 快速入口链接 */
.quick-links{
  display:flex; flex-wrap:wrap; gap:8px;
  margin-top:18px; margin-bottom:4px;
}
.quick-links a{
  font-family:var(--font-mono); font-size:.78rem;
  color:var(--ink-soft); text-decoration:none;
  padding:5px 10px; border:1px solid var(--rule);
  border-radius:var(--radius); background:var(--paper-2);
  transition:all .15s ease;
}
.quick-links a:hover{
  color:var(--ledger-dark); border-color:var(--ledger);
  background:var(--ledger-tint);
}

.btn{
  font-family:var(--font-mono); font-size:.85rem; letter-spacing:.02em;
  padding:12px 22px; border-radius:var(--radius); text-decoration:none;
  display:inline-block; border:1px solid var(--ink); transition:.15s ease;
  text-align:center;
}
.btn-primary{background:var(--ink); color:var(--paper);}
.btn-primary:hover{background:var(--ledger-dark); border-color:var(--ledger-dark);}
.btn-outline{background:transparent; color:var(--ink);}
.btn-outline:hover{background:var(--ledger-tint); border-color:var(--ledger);}

/* ---- ledger sample card (hero visual) ---- */
.ledger-card{
  background:var(--paper-2); border:1px solid var(--ink);
  border-radius:var(--radius); position:relative; padding:22px 22px 18px;
}
.ledger-card::after{
  content:"CHECKLIST PREVIEW";
  position:absolute; top:-10px; right:14px;
  background:var(--brass-tint); color:#5A430F;
  font-family:var(--font-mono); font-size:.62rem; letter-spacing:.06em;
  padding:3px 8px; border:1px solid var(--brass); border-radius:2px;
}
.ledger-card .form-title{
  font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft);
  letter-spacing:.04em; margin-bottom:10px; text-transform:uppercase;
}
.ledger-row{
  display:flex; justify-content:space-between; gap:12px;
  font-family:var(--font-mono); font-size:.86rem;
  padding:9px 0; border-bottom:1px dashed var(--rule);
}
.ledger-row:last-child{border-bottom:none;}
.ledger-row .lbl{color:var(--ink-soft);}
.ledger-row .val{font-weight:500;}
.ledger-row .val.flag{color:var(--alert);}

/* ---- trust strip ---- */
.trust-strip{
  background:var(--ledger); color:var(--ledger-tint);
}
.trust-strip .container{
  display:flex; flex-wrap:wrap; gap:32px; justify-content:space-between;
  padding:22px 24px; font-family:var(--font-mono); font-size:.82rem;
}
.trust-strip strong{color:#fff; font-weight:500;}

/* ---- ledger list (article rows) ---- */
.ledger-list{border-top:1px solid var(--ink);}
.ledger-item{
  display:grid; grid-template-columns:120px 1fr auto; gap:20px; align-items:start;
  padding:22px 0; border-bottom:1px solid var(--rule);
  text-decoration:none; color:var(--ink);
}
.ledger-item:nth-child(even){background:var(--ledger-tint);}
.ledger-item .code{
  font-family:var(--font-mono); font-size:.78rem; color:var(--ledger-dark);
  padding-top:2px;
}
.ledger-item h3{margin-bottom:.25em;}
.ledger-item .dek{color:var(--ink-soft); font-size:.95rem; margin:0;}
.ledger-item .meta{
  font-family:var(--font-mono); font-size:.72rem; color:var(--ink-soft);
  text-align:right; white-space:nowrap; padding-top:4px;
}
.ledger-item:hover h3{text-decoration:underline; text-decoration-color:var(--brass);}

/* ---- faq accordion ---- */
.faq-item{
  border-bottom:1px solid var(--rule); padding:6px 0;
}
.faq-item summary{
  cursor:pointer; list-style:none; font-family:var(--font-display); font-size:1.05rem;
  padding:14px 0; display:flex; justify-content:space-between; gap:16px; align-items:baseline;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+"; font-family:var(--font-mono); color:var(--brass); font-size:1.2rem; flex-shrink:0;
}
.faq-item[open] summary::after{content:"–";}
.faq-item .answer{padding:0 0 18px; color:var(--ink-soft); max-width:var(--measure);}

/* ---- about teaser ---- */
.about-teaser{display:grid; grid-template-columns:120px 1fr; gap:28px; align-items:start;}
.avatar{
  width:120px; height:120px; border-radius:50%;
  background:var(--ledger); color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-size:2.4rem;
}
.credential-line{
  font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft); margin-top:8px;
}

/* ---- tools strip ---- */
.tools-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
.tool-card{
  border:1px solid var(--ink); border-radius:var(--radius); padding:22px;
  text-decoration:none; color:var(--ink); background:var(--paper-2);
  transition:.15s ease;
}
.tool-card:hover{border-color:var(--brass); background:var(--brass-tint);}
.tool-card .tag{
  font-family:var(--font-mono); font-size:.72rem; color:var(--brass); letter-spacing:.04em;
}

/* ---- homepage topic entry points ---- */
.topic-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:28px;}
.topic-card{
  display:block; border:1px solid var(--rule); border-radius:var(--radius); padding:20px;
  background:var(--paper-2); color:var(--ink); text-decoration:none; transition:.15s ease;
}
.topic-card:hover{border-color:var(--ledger); background:var(--ledger-tint);}
.topic-card .tag{
  display:inline-block; font-family:var(--font-mono); font-size:.7rem; color:var(--ledger-dark);
  letter-spacing:.04em; margin-bottom:10px;
}
.topic-card h3{margin-bottom:.35em;}
.topic-card p{color:var(--ink-soft); margin:0; font-size:.95rem;}

/* ---- footer ---- */
.site-footer{
  background:var(--ink); color:var(--paper);
  padding:48px 0 28px;
}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px;
  padding-bottom:32px; border-bottom:1px solid rgba(246,245,239,.18);
}
.site-footer h4{
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.06em; text-transform:uppercase;
  color:var(--brass-tint); margin-bottom:14px;
}
.site-footer ul{list-style:none; margin:0; padding:0;}
.site-footer li{margin-bottom:8px;}
.site-footer a{color:var(--paper); opacity:.85; text-decoration:none; font-size:.9rem;}
.site-footer a:hover{opacity:1; text-decoration:underline;}
.footer-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  padding-top:20px; font-family:var(--font-mono); font-size:.72rem; color:rgba(246,245,239,.65);
}
.footer-bottom a{font-size:inherit; color:inherit;}
.disclaimer{
  font-size:.82rem; color:rgba(246,245,239,.75); max-width:64ch; margin-top:6px;
}

/* ---- generic sidebar layout (insights page) ---- */
.layout-with-sidebar{
  display:grid; grid-template-columns:220px 1fr; gap:40px; align-items:start;
}
.layout-with-sidebar > *, .article-layout > *, .hero > *{min-width:0;}
.category-list{list-style:none; margin:0; padding:0; position:sticky; top:96px;}
.category-list li{border-bottom:1px solid var(--rule);}
.category-list a,
.category-list span{
  display:flex; justify-content:space-between; padding:12px 4px; text-decoration:none;
  color:var(--ink); font-family:var(--font-mono); font-size:.82rem;
}
.category-list a:hover, .category-list a.active, .category-list span.active{color:var(--ledger-dark);}
.category-list .count{color:var(--ink-soft);}
.breadcrumb{font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft); margin-bottom:6px;}

/* ---- services placeholder page ---- */
.status-card{
  border:1px solid var(--ink); border-radius:var(--radius); padding:26px 28px;
  background:var(--paper-2); display:flex; gap:16px; align-items:flex-start;
}
.status-dot{
  width:10px; height:10px; border-radius:50%; background:var(--brass); margin-top:8px; flex-shrink:0;
}
.expert-inline-note{
  max-width:72ch;
  margin:16px 0 0;
  font-size:.92rem;
  color:var(--ink-soft);
  border-left:3px solid var(--rule);
  padding-left:12px;
}
.roadmap-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.roadmap-card{border:1px solid var(--rule); border-radius:var(--radius); padding:20px; background:var(--paper-2);}
.roadmap-card .stage{font-family:var(--font-mono); font-size:.72rem; color:var(--ledger-dark); letter-spacing:.05em;}
.not-list{padding-left:1.1em;}
.not-list li{margin-bottom:.5em; color:var(--ink-soft);}

/* ---- article page ---- */
.article-layout{display:grid; grid-template-columns:200px 1fr; gap:44px; align-items:start;}
.toc-box{
  position:sticky; top:96px; border:1px solid var(--rule); border-radius:var(--radius);
  padding:16px; background:var(--paper-2);
}
.toc-box .eyebrow{margin-bottom:8px; display:block;}
.toc-box ul{list-style:none; margin:0; padding:0;}
.toc-box li{margin-bottom:9px; font-size:.85rem;}
.toc-box a{color:var(--ink-soft); text-decoration:none;}
.toc-box a:hover{color:var(--ledger-dark);}
.article-body{max-width:var(--measure); overflow-wrap:anywhere;}
.article-meta{
  display:flex; flex-wrap:wrap; gap:16px; align-items:center;
  font-family:var(--font-mono); font-size:.8rem; color:var(--ink-soft);
  margin:14px 0 28px; padding-bottom:18px; border-bottom:1px solid var(--rule);
}
.article-meta .code-tag{
  background:var(--ledger-tint); color:var(--ledger-dark); padding:3px 8px; border-radius:2px;
}
.article-body h2{margin-top:1.6em; scroll-margin-top:90px;}
.article-body h3{margin-top:1.3em; scroll-margin-top:90px;}
.callout{
  border-left:4px solid var(--ledger); background:var(--ledger-tint);
  padding:16px 20px; margin:24px 0; border-radius:0 var(--radius) var(--radius) 0;
}
.callout p:last-child{margin-bottom:0;}
.callout .eyebrow{color:var(--ledger-dark);}
.data-table{width:100%; border-collapse:collapse; margin:20px 0; font-size:.92rem;}
.data-table th, .data-table td{
  border:1px solid var(--rule); padding:10px 12px; text-align:left; vertical-align:top;
}
.data-table th{
  background:var(--ledger-tint); font-family:var(--font-mono); font-size:.76rem;
  letter-spacing:.03em; text-transform:uppercase; color:var(--ledger-dark);
}
.data-table td{overflow-wrap:anywhere;}
.footnotes{
  margin-top:40px; padding-top:20px; border-top:1px solid var(--rule);
  font-family:var(--font-mono); font-size:.78rem; color:var(--ink-soft);
}
.footnotes ol{padding-left:1.2em; margin:0;}
.footnotes li{margin-bottom:8px;}
.author-box{
  display:flex; gap:18px; align-items:flex-start; margin-top:48px; padding-top:28px;
  border-top:1px solid var(--ink);
}
.author-box .avatar{width:64px; height:64px; font-size:1.5rem; flex-shrink:0;}
.related-grid{margin-top:16px;}

/* ---- questionnaire / quiz ---- */
.quiz-shell{
  border:1px solid var(--ink); border-radius:var(--radius); background:var(--paper-2);
  padding:32px; max-width:680px; margin:0 auto;
}
.quiz-progress-track{
  height:6px; background:var(--rule); border-radius:4px; overflow:hidden; margin-bottom:28px;
}
.quiz-progress-fill{height:100%; background:var(--ledger); width:14%; transition:width .25s ease;}
.quiz-step-label{
  font-family:var(--font-mono); font-size:.76rem; color:var(--ink-soft);
  letter-spacing:.05em; text-transform:uppercase; margin-bottom:10px;
}
.quiz-question h2{font-size:1.35rem; margin-bottom:1em;}
.quiz-options{display:flex; flex-direction:column; gap:10px; margin-bottom:24px;}
.quiz-option{
  display:block; border:1px solid var(--rule); border-radius:var(--radius);
  padding:14px 16px; cursor:pointer; transition:.15s ease; background:var(--paper-2);
}
.quiz-option:hover{border-color:var(--ledger); background:var(--ledger-tint);}
.quiz-option input{margin-right:10px;}
.quiz-option.selected{border-color:var(--ledger); background:var(--ledger-tint); font-weight:600;}
.quiz-nav{display:flex; justify-content:space-between; gap:12px;}
.quiz-nav .btn{cursor:pointer;}
.quiz-nav .btn[disabled]{opacity:.35; pointer-events:none;}
.quiz-result h2{margin-bottom:.3em;}
.result-flag{
  display:flex; gap:14px; align-items:flex-start; padding:16px 0; border-bottom:1px solid var(--rule);
}
.result-flag:last-of-type{border-bottom:none;}
.result-flag .tag{
  font-family:var(--font-mono); font-size:.7rem; padding:3px 8px; border-radius:2px;
  background:var(--brass-tint); color:#5A430F; white-space:nowrap; margin-top:2px;
}
.result-flag .tag.high{background:#F0DAD4; color:var(--alert);}
.result-flag .tag.clear{background:var(--ledger-tint); color:var(--ledger-dark);}
.quiz-restart{margin-top:20px;}

/* ---- filing threshold checker ---- */
.threshold-layout{
  display:grid;
  grid-template-columns:minmax(0, 1fr) 320px;
  gap:28px;
  align-items:start;
}
.threshold-panel{
  border:1px solid var(--ink);
  border-radius:var(--radius);
  background:var(--paper-2);
  padding:26px;
}
.threshold-panel h2{font-size:1.35rem;}
.threshold-fieldset{
  border:1px solid var(--rule);
  border-radius:var(--radius);
  padding:18px;
  margin:0 0 18px;
}
.threshold-fieldset legend{
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--ledger-dark);
  padding:0 6px;
}
.threshold-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
}
.threshold-field label,
.threshold-check{
  display:block;
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--ink-soft);
  margin-bottom:6px;
}
.threshold-field input,
.threshold-field select{
  width:100%;
  min-width:0;
  border:1px solid var(--rule);
  border-radius:var(--radius);
  background:var(--paper-2);
  color:var(--ink);
  padding:11px 12px;
  font:inherit;
}
.threshold-check{
  display:flex;
  gap:9px;
  align-items:flex-start;
  margin:0;
  line-height:1.45;
  color:var(--ink);
}
.threshold-check input{margin-top:4px; flex:0 0 auto;}
.threshold-check-list{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px 14px;
}
.threshold-result{
  border-top:1px solid var(--ink);
  padding-top:24px;
  margin-top:24px;
  display:none;
}
.threshold-result.show{display:block;}
.threshold-result-title{
  font-family:var(--font-display);
  font-size:clamp(1.5rem, 2.6vw, 2.1rem);
  line-height:1.15;
  margin-bottom:10px;
}
.threshold-reason-list{
  padding-left:1.1em;
  margin:12px 0 20px;
}
.threshold-reason-list li{margin-bottom:6px;}
.threshold-next-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.threshold-aside{
  position:sticky;
  top:96px;
}
.threshold-mini-list{
  list-style:none;
  padding:0;
  margin:12px 0 0;
  border-top:1px solid var(--rule);
}
.threshold-mini-list li{
  padding:10px 0;
  border-bottom:1px solid var(--rule);
  color:var(--ink-soft);
  font-size:.9rem;
}

/* ---- Q&A search page ---- */
.qa-search{
  display:flex; gap:0; border:1px solid var(--ink); border-radius:var(--radius);
  overflow:hidden; max-width:480px; margin:24px 0 8px;
}
.qa-search input{
  flex:1; min-width:0; border:none; padding:13px 14px; font-family:var(--font-body); font-size:.95rem; background:var(--paper-2);
}
.qa-search .icon{
  font-family:var(--font-mono); display:flex; align-items:center; padding:0 16px;
  background:var(--ink); color:var(--paper); font-size:.85rem;
}
.qa-jump{display:flex; flex-wrap:wrap; gap:8px; margin:18px 0 8px;}
.qa-jump a{
  font-family:var(--font-mono); font-size:.76rem; padding:6px 12px; border:1px solid var(--rule);
  border-radius:20px; text-decoration:none; color:var(--ink-soft);
}
.qa-jump a:hover{border-color:var(--ledger); color:var(--ledger-dark);}
.qa-group{margin-top:44px; scroll-margin-top:90px;}
.qa-group h2{
  padding-bottom:10px; border-bottom:1px solid var(--ink); margin-bottom:4px;
}
.qa-empty{color:var(--ink-soft); font-style:italic; padding:24px 0; display:none;}

/* ===================== responsive: phone / tablet / desktop ===================== */
@media (max-width: 900px){
  .hero{grid-template-columns:1fr; gap:32px;}
  .roadmap-grid{grid-template-columns:1fr;}
  .topic-grid{grid-template-columns:1fr 1fr;}
  .layout-with-sidebar{grid-template-columns:1fr;}
  .article-layout{grid-template-columns:1fr;}
  .threshold-layout{grid-template-columns:1fr;}
  .threshold-aside{position:static;}
  .toc-box{position:static;}
  .category-list{position:static; display:flex; flex-wrap:wrap; gap:4px 18px;}
  .category-list li{border-bottom:none;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .ledger-item{grid-template-columns:100px 1fr; gap:14px;}
  .ledger-item .meta{grid-column:1 / -1; text-align:left; display:flex; gap:10px;}

  .nav-toggle{display:block;}
  .nav-links{
    position:fixed; inset:64px 0 auto 0; background:var(--paper-2); z-index:50;
    flex-direction:column; gap:0; padding:8px 24px 20px; border-bottom:1px solid var(--rule);
    transform:translateY(-8px); opacity:0; pointer-events:none; transition:.18s ease;
    max-height:calc(100vh - 64px); overflow-y:auto;
  }
  .nav-links.open{transform:translateY(0); opacity:1; pointer-events:auto;}
  .nav-links a{padding:14px 0; border-bottom:1px solid var(--rule); width:100%; font-size:1rem;}
  .nav-links li, .nav-links a{display:block;}
}

@media (max-width: 640px){
  .about-teaser{grid-template-columns:1fr;}
  .tools-grid{grid-template-columns:1fr;}
  .topic-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr; gap:24px;}
  .quiz-shell{padding:22px 18px;}
  .article-body{overflow-x:auto;}
  .data-table{min-width:520px;}
  .data-table th, .data-table td{min-width:140px;}
  .author-box{flex-direction:column;}
  .category-list{display:block;}
  .category-list li{border-bottom:1px solid var(--rule);}
  .result-flag{flex-direction:column; gap:8px;}
}

@media (max-width: 480px){
  body{font-size:15.5px;}
  .container{padding:0 16px;}
  .section{padding-block:44px;}
  .section-tight{padding-block:28px;}
  .ledger-item{grid-template-columns:1fr; gap:6px;}
  .ledger-item .meta{grid-column:auto; display:block; text-align:left; white-space:normal;}
  .nav-row{padding:14px 16px;}
  .brand-tagline{max-width:22ch;}
  .hero{padding-block:44px 32px;}
  .hero-cta, .hero-actions{display:grid; grid-template-columns:1fr; gap:10px;}
  .hero-cta .btn, .hero-actions .btn{width:100%;}
  .ledger-card{padding:18px 16px 14px;}
  .ledger-row{display:grid; grid-template-columns:1fr; gap:2px;}
  .roadmap-grid{gap:14px;}
  .status-card{flex-direction:column; padding:20px;}
  .qa-search{max-width:100%;}
  .qa-search .icon{padding:0 12px;}
  .quiz-nav{display:grid; grid-template-columns:1fr; gap:10px;}
  .quiz-nav .btn{width:100%;}
  .threshold-grid,
  .threshold-check-list{grid-template-columns:1fr;}
  .threshold-panel{padding:20px;}
  .threshold-next-actions{display:grid; grid-template-columns:1fr;}
  .threshold-next-actions .btn{width:100%;}
}


@media (prefers-reduced-motion: reduce){
  *{transition-duration:.001ms !important; animation-duration:.001ms !important; scroll-behavior:auto !important;}
}

/* ===================================================================
   Quiz Steps Indicator & Session recovery styles
   =================================================================== */
.quiz-steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 14px 20px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.02);
}
.quiz-step-node {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  transition: all 0.2s ease;
}
.quiz-step-node.active {
  color: var(--ledger-dark);
  font-weight: 500;
}
.quiz-step-node.passed {
  color: var(--ledger);
}
.quiz-step-node .step-num {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  background: var(--paper);
  transition: all 0.2s ease;
}
.quiz-step-node.active .step-num {
  border-color: var(--brass);
  background: var(--brass-tint);
  color: var(--brass);
  transform: scale(1.1);
}
.quiz-step-node.passed .step-num {
  border-color: var(--ledger);
  background: var(--ledger-tint);
  color: var(--ledger);
}
.step-connector {
  flex: 1;
  height: 1px;
  background: var(--rule);
  margin: 0 12px;
}
.quiz-restore-alert {
  background: var(--brass-tint);
  border: 1px solid var(--brass);
  color: #5a430f;
  padding: 10px 14px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  animation: fadeIn 0.3s ease;
}
.quiz-restore-alert button {
  background: transparent;
  border: none;
  color: var(--ledger-dark);
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  font-size: inherit;
}
.quiz-restore-alert button:hover {
  color: var(--ink);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 580px) {
  .quiz-step-node .step-text {
    display: none;
  }
  .quiz-steps {
    padding: 10px 14px;
  }
}

/* ===================================================================
   Quiz Topic Grid & Selector View
   =================================================================== */
.topic-select-header {
  margin-bottom: 28px;
  max-width: var(--measure);
}
.topic-select-header h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.8rem);
  margin-bottom: 8px;
}
.topic-select-header p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}
.quiz-topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.quiz-topic-card {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}
.quiz-topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--ledger);
  box-shadow: 0 8px 24px rgba(47, 93, 72, 0.08);
}
.topic-icon-wrap {
  font-size: 1.8rem;
  width: 48px;
  height: 48px;
  background: var(--ledger-tint);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s ease;
}
.quiz-topic-card:hover .topic-icon-wrap {
  background: var(--brass-tint);
}
.topic-info-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.topic-info-wrap h3 {
  font-size: 1.05rem;
  margin: 0 0 6px 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 600;
}
.topic-info-wrap p {
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0 0 14px 0;
  flex-grow: 1;
}
.topic-action-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ledger-dark);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
}
.quiz-topic-card:hover .topic-action-link {
  color: var(--brass);
  text-decoration: underline;
}

.quiz-back-to-list-wrap {
  margin-bottom: 20px;
}
.btn-text-link {
  background: transparent;
  border: none;
  color: var(--ledger-dark);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}
.btn-text-link:hover {
  color: var(--brass);
}

@media (max-width: 640px) {
  .quiz-topic-grid {
    grid-template-columns: 1fr;
  }
}


/* ===================================================================
   Check page static module intro
   =================================================================== */
.quiz-module-intro {
  margin-bottom: 32px;
  padding: 20px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.quiz-module-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.quiz-module-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: calc(var(--radius) - 2px);
  color: var(--ink);
  text-decoration: none;
  transition: .15s ease;
}
.quiz-module-item:hover {
  border-color: var(--ledger);
  background: var(--ledger-tint);
}
.quiz-module-item .tag {
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 2px;
}
.quiz-module-item strong {
  display: block;
  font-size: .9rem;
  margin-bottom: 4px;
  color: var(--ink);
}
.quiz-module-item p {
  margin: 0;
  font-size: .8rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
@media (max-width: 640px) {
  .quiz-module-list {
    grid-template-columns: 1fr;
  }
}