/* ===== TC KnowledgeBase — Public theme ===== */
:root{
  --brand:#2563eb; --brand-dark:#1d4ed8; --ink:#1f2937; --muted:#6b7280;
  --line:#e5e7eb; --bg:#f8fafc; --card:#fff; --radius:10px; --ok:#16a34a;
  --warn:#d97706; --err:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
img{max-width:100%}

/* Header */
.site-header{background:var(--card);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;padding:14px 20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{font-size:26px}
.brand small{display:block;color:var(--muted);font-weight:400;font-size:12px}
.search-box{flex:1;display:flex;max-width:520px}
.search-box input{flex:1;padding:9px 12px;border:1px solid var(--line);border-radius:var(--radius) 0 0 var(--radius);font-size:14px}
.search-box button{padding:9px 18px;border:0;background:var(--brand);color:#fff;border-radius:0 var(--radius) var(--radius) 0;cursor:pointer}
.search-box button:hover{background:var(--brand-dark)}
.top-nav a{font-size:14px;font-weight:600}
.cat-bar{background:#0f172a}
.cat-bar .container{display:flex;flex-wrap:wrap;gap:18px;padding:10px 20px}
.cat-bar a{color:#cbd5e1;font-size:14px}
.cat-bar a:hover{color:#fff;text-decoration:none}

/* Layout */
.main-content{padding:28px 20px 60px}
.hero{text-align:center;padding:30px 0 10px}
.hero h1{margin:0 0 6px;font-size:32px}
.hero p{color:var(--muted);margin:0}
.section-title{font-size:18px;margin:28px 0 14px;padding-bottom:6px;border-bottom:2px solid var(--line)}
.two-col{display:grid;grid-template-columns:2fr 1fr;gap:32px}
@media(max-width:760px){.two-col{grid-template-columns:1fr}.header-inner{flex-wrap:wrap}}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:block;color:var(--ink);transition:.15s}
.cat-card:hover{border-color:var(--brand);box-shadow:0 4px 14px rgba(0,0,0,.06);text-decoration:none;transform:translateY(-2px)}
.cat-icon{font-size:28px}
.cat-card h3{margin:8px 0 6px;font-size:16px}
.cat-card p{color:var(--muted);font-size:13px;margin:0 0 8px}
.cat-card .count{font-size:12px;color:var(--brand);font-weight:600}

/* Lists */
.article-list{list-style:none;padding:0;margin:0}
.article-list li{padding:14px 0;border-bottom:1px solid var(--line)}
.article-list li a{font-size:16px;font-weight:600}
.article-list li p{margin:4px 0;color:var(--muted);font-size:14px}
.article-list li small,.link-list small{color:var(--muted);font-size:12px}
.link-list{list-style:none;padding:0;margin:0 0 18px}
.link-list li{padding:7px 0;border-bottom:1px solid var(--line);font-size:14px}
.muted{color:var(--muted)}

/* Article page */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.article h1{margin:0 0 6px}
.article-meta{color:var(--muted);font-size:13px;margin:0 0 20px}
.article-body{font-size:16px}
.article-body h2{margin-top:28px}
.article-body pre{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;overflow:auto}
.article-body code{background:#f1f5f9;padding:2px 5px;border-radius:4px}
.article-body table{border-collapse:collapse;width:100%}
.article-body th,.article-body td{border:1px solid var(--line);padding:8px}
/* Quill editor output classes */
.article-body .ql-align-center{text-align:center}
.article-body .ql-align-right{text-align:right}
.article-body .ql-align-justify{text-align:justify}
.article-body .ql-indent-1{padding-left:3em}
.article-body .ql-indent-2{padding-left:6em}
.article-body .ql-indent-3{padding-left:9em}
.article-body .ql-indent-4{padding-left:12em}
.article-body .ql-syntax{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;overflow:auto;white-space:pre-wrap}
.attachments{margin-top:28px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.download-list{list-style:none;padding:0;margin:0}
.download-list li{padding:8px 0;border-bottom:1px solid var(--line)}
.tags{margin-top:18px}
.tag{display:inline-block;background:#eef2ff;color:var(--brand-dark);font-size:12px;padding:3px 10px;border-radius:20px;margin-right:6px}
.rating{margin-top:26px;padding:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);text-align:center}
.btn-vote{background:#fff;border:1px solid var(--line);padding:8px 18px;border-radius:8px;cursor:pointer;margin:0 6px;font-size:14px}
.btn-vote:hover{border-color:var(--brand)}
.related{margin-top:30px}
.comments{margin-top:36px}
.comment{padding:12px 0;border-bottom:1px solid var(--line)}
.comment p{margin:6px 0 0}
.comment-form{margin-top:18px;display:flex;flex-direction:column;gap:10px;max-width:640px}
.comment-form .row{display:flex;gap:10px}
.comment-form input,.comment-form textarea{padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;width:100%;font-family:inherit}
.btn{background:var(--brand);color:#fff;border:0;padding:10px 22px;border-radius:8px;cursor:pointer;font-size:14px;align-self:flex-start}
.btn:hover{background:var(--brand-dark)}
.lead{font-size:17px;color:var(--muted)}

/* Flash */
.flash{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}
.flash-success{background:#dcfce7;color:#166534}
.flash-error{background:#fee2e2;color:#991b1b}
.flash-info{background:#dbeafe;color:#1e40af}

/* Phase 2: language switcher in cat bar */
.cat-bar .lang-switch{margin-left:auto;display:inline-flex;gap:8px}
.cat-bar .lang-switch a{color:#94a3b8;font-weight:600}
.cat-bar .lang-switch a.on{color:#fff}

/* News strip */
.news-strip{background:#fffbeb;border:1px solid #fde68a;border-radius:var(--radius);padding:10px 14px;font-size:14px;margin-bottom:20px}
.news-strip a{margin:0 2px}
.news-strip .news-all{float:right;font-weight:600}

/* Article head + print link */
.article-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.print-link{font-size:13px;white-space:nowrap;border:1px solid var(--line);padding:6px 12px;border-radius:8px;color:var(--ink)}
.print-link:hover{border-color:var(--brand);text-decoration:none}

/* CAPTCHA field */
.captcha{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.captcha label{display:block;font-size:13px;margin-bottom:6px}
.captcha input{width:120px;padding:8px 10px;border:1px solid var(--line);border-radius:8px}

/* Glossary */
.glossary-az{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 20px}
.glossary-az a{display:inline-block;width:30px;text-align:center;padding:5px 0;border:1px solid var(--line);border-radius:6px;font-weight:600}
.glossary-letter{color:var(--brand);border-bottom:2px solid var(--line);padding-bottom:4px;margin-top:26px}
dl.glossary dt{font-weight:700;margin-top:14px}
dl.glossary dd{margin:4px 0 0;color:#374151}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--card);padding:24px 0;color:var(--muted);font-size:13px;text-align:center}