:root{
  --bg:#0A1420;
  --bg-elev:#0E1E2E;
  --card:#12253A;
  --card-hover:#173252;
  --border:#1E3752;
  --text:#EAF3FB;
  --text-dim:#9CBEDA;
  --text-faint:#5D7F9C;
  --teal:#02C39A;
  --teal-dark:#028090;
  --mint:#7FE6C9;
  --blue:#29B6E8;
  --blue-dark:#1888B0;
  --cyan:#7FE0F0;
  --amber:#F4A261;
  --amber-dk:#E76F51;
  --red:#E76F51;
  --purple:#8C9EFF;
  --ckm:#C77DFF;
  --ckm-dark:#8B5CF6;
  --lc:#FFC857;
  --lc-dark:#E0A030;
  --radius:14px;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"Source Han Sans TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
  line-height:1.6;
  padding-bottom:70px;
}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-weight:900;}
main{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ── Top Nav ── */
.topnav{
  position:sticky;top:0;z-index:50;
  background:rgba(10,20,32,0.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;gap:24px;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:900;font-size:1.05rem;white-space:nowrap;}
.brand-icon{color:var(--mint);}
.nav-links{display:flex;gap:20px;flex-wrap:wrap;}
.nav-links a{display:flex;align-items:center;gap:6px;font-size:0.9rem;color:var(--text-dim);transition:color .15s;}
.nav-links a:hover{color:var(--text);}
.nav-ic{color:var(--mint);}
.badge-count{background:var(--teal-dark);color:#fff;font-size:0.7rem;font-weight:700;padding:1px 7px;border-radius:20px;}
.search{background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:8px 14px;font-size:0.86rem;width:200px;}
.search:focus{outline:1px solid var(--mint);}

/* ── Hub Hero ── */
.hero{padding:56px 0 32px;}
.pill{display:inline-block;background:var(--card);border:1px solid var(--border);color:var(--mint);font-size:0.82rem;font-weight:700;padding:6px 14px;border-radius:20px;margin-bottom:18px;}
.hero h1{font-size:2.2rem;line-height:1.35;margin-bottom:14px;max-width:820px;}
.hero .lead{color:var(--text-dim);max-width:760px;font-size:0.98rem;margin-bottom:8px;}
.hero .lead strong{color:var(--mint);}
.hero-byline{color:var(--text-faint);font-size:0.85rem;margin-bottom:28px;}

.pillar-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-bottom:8px;}
.pillar-nav-card{
  border-radius:var(--radius);padding:26px;cursor:pointer;
  transition:transform .15s,border-color .15s;
  display:block;
}
.pillar-nav-card:hover{transform:translateY(-2px);}
.pillar-nav-card.pillar-weight{background:linear-gradient(160deg,rgba(2,195,154,0.14),var(--card));border:1px solid rgba(2,195,154,0.4);}
.pillar-nav-card.pillar-weight:hover{border-color:var(--teal);}
.pillar-nav-card.pillar-chronic{background:linear-gradient(160deg,rgba(41,182,232,0.14),var(--card));border:1px solid rgba(41,182,232,0.4);}
.pillar-nav-card.pillar-chronic:hover{border-color:var(--blue);}
.pillar-nav-card.pillar-ckm{background:linear-gradient(160deg,rgba(199,125,255,0.14),var(--card));border:1px solid rgba(199,125,255,0.4);}
.pillar-nav-card.pillar-ckm:hover{border-color:var(--ckm);}
.pillar-nav-card.pillar-lc{background:linear-gradient(160deg,rgba(255,200,87,0.14),var(--card));border:1px solid rgba(255,200,87,0.4);}
.pillar-nav-card.pillar-lc:hover{border-color:var(--lc);}
.pillar-nav-ic{font-size:1.8rem;margin-bottom:10px;}
.pillar-nav-card h3{font-size:1.25rem;margin-bottom:8px;}
.pillar-nav-card p{color:var(--text-dim);font-size:0.88rem;margin-bottom:14px;}
.pillar-nav-stats{display:flex;gap:16px;font-size:0.78rem;color:var(--text-faint);flex-wrap:wrap;}
.pillar-nav-stats b{color:var(--text);}

/* ── Pillar Section ── */
.pillar-section{padding:52px 0;border-top:1px solid var(--border);}
.pillar-head{margin-bottom:8px;}
.pillar-head h2{font-size:1.6rem;display:flex;align-items:center;gap:10px;}
.pillar-head p{color:var(--text-dim);font-size:0.92rem;max-width:800px;margin-top:8px;}
.pillar-weight .pillar-head h2{color:var(--mint);}
.pillar-chronic .pillar-head h2{color:var(--cyan);}
.pillar-ckm .pillar-head h2{color:var(--ckm);}
.pillar-lc .pillar-head h2{color:var(--lc);}

.sub-nav{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 20px;}
.sub-nav a{
  background:var(--card);border:1px solid var(--border);color:var(--text-dim);
  padding:7px 16px;border-radius:20px;font-size:0.84rem;font-weight:700;
}
.pillar-weight .sub-nav a:hover{border-color:var(--teal);color:var(--text);}
.pillar-chronic .sub-nav a:hover{border-color:var(--blue);color:var(--text);}
.pillar-ckm .sub-nav a:hover{border-color:var(--ckm);color:var(--text);}
.pillar-lc .sub-nav a:hover{border-color:var(--lc);color:var(--text);}

.sub-section{margin:36px 0;}
.sub-section h3{font-size:1.15rem;display:flex;align-items:center;gap:8px;margin-bottom:6px;}
.sub-section-intro{color:var(--text-dim);font-size:0.88rem;max-width:780px;margin-bottom:16px;}
.sub-section-intro b{color:var(--mint);}
.pillar-chronic .sub-section-intro b{color:var(--cyan);}
.pillar-ckm .sub-section-intro b{color:var(--ckm);}
.pillar-lc .sub-section-intro b{color:var(--lc);}

/* ── Stage blocks (shared by 基礎衛教 course units) ── */
.stage-block{margin-bottom:28px;}
.stage-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.stage-num{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:0.95rem;flex-shrink:0;}
.stage-title{font-size:1.05rem;font-weight:900;}
.stage-sub{color:var(--text-dim);font-size:0.82rem;}

/* ── Cards (course / article / treatment share the same look) ── */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.course-card, .article-card, .treatment-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;cursor:pointer;transition:border-color .15s,background .15s;
}
.pillar-weight .course-card:hover, .pillar-weight .article-card:hover, .pillar-weight .treatment-card:hover{border-color:var(--teal-dark);background:var(--card-hover);}
.pillar-chronic .course-card:hover, .pillar-chronic .article-card:hover, .pillar-chronic .treatment-card:hover{border-color:var(--blue-dark);background:var(--card-hover);}
.pillar-ckm .course-card:hover, .pillar-ckm .article-card:hover, .pillar-ckm .treatment-card:hover{border-color:var(--ckm-dark);background:var(--card-hover);}
.pillar-lc .course-card:hover, .pillar-lc .article-card:hover, .pillar-lc .treatment-card:hover{border-color:var(--lc-dark);background:var(--card-hover);}
.course-card:focus-visible, .article-card:focus-visible, .treatment-card:focus-visible{outline:2px solid var(--mint);outline-offset:2px;}
.card-top{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap;}
.card-tag{font-size:0.7rem;font-weight:800;color:#04211E;padding:2px 9px;border-radius:6px;flex-shrink:0;}
.card-tag.tag-teal{background:var(--teal);}
.card-tag.tag-blue{background:var(--blue);color:#04212E;}
.card-tag.tag-ckm{background:var(--ckm);color:#2A0A4A;}
.card-tag.tag-lc{background:var(--lc);color:#3A2600;}
.card-audience{font-size:0.7rem;color:var(--text-faint);}
.card-title{font-weight:700;font-size:0.96rem;display:block;}
.card-body{color:var(--text-dim);font-size:0.83rem;line-height:1.6;}
.card-hw{margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);font-size:0.78rem;color:var(--text-faint);}
.card-hw b{color:var(--mint);font-weight:700;}
.pillar-chronic .card-hw b{color:var(--cyan);}
.pillar-ckm .card-hw b{color:var(--ckm);}
.pillar-lc .card-hw b{color:var(--lc);}
.card-flag{margin-top:10px;background:rgba(231,111,81,0.12);border:1px solid rgba(231,111,81,0.3);border-radius:8px;padding:8px 10px;font-size:0.76rem;color:var(--amber);}
.card-more{margin-top:10px;color:var(--teal);font-size:0.78rem;font-weight:700;}
.pillar-chronic .card-more{color:var(--blue);}
.pillar-ckm .card-more{color:var(--ckm);}
.pillar-lc .card-more{color:var(--lc);}

/* ── Calculators ── */
.calc-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;}
.calc-tabs{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap;}
.calc-tab{background:var(--bg-elev);border:1px solid var(--border);color:var(--text-dim);padding:7px 15px;border-radius:20px;font-size:0.84rem;font-weight:700;cursor:pointer;}
.calc-tab.active{background:var(--blue-dark);color:#fff;border-color:var(--blue);}
.pillar-weight .calc-tab.active{background:var(--teal-dark);border-color:var(--teal);}
.pillar-ckm .calc-tab.active{background:var(--ckm-dark);border-color:var(--ckm);}
.pillar-lc .calc-tab.active{background:var(--lc-dark);border-color:var(--lc);}
.calc-panel{display:none;}
.calc-panel.active{display:grid;grid-template-columns:1.1fr 1fr;gap:26px;align-items:start;}
.calc-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.calc-field{display:flex;flex-direction:column;gap:6px;}
.calc-field-wide{grid-column:1 / -1;}
.calc-field label{font-size:0.8rem;color:var(--text-dim);font-weight:700;}
.calc-field input, .calc-field select{background:var(--bg-elev);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:9px 12px;font-size:0.9rem;font-family:inherit;}
.calc-field input:focus, .calc-field select:focus{outline:1px solid var(--teal);}
.calc-radio-row{display:flex;gap:10px;}
.calc-radio{display:flex;align-items:center;gap:6px;background:var(--bg-elev);border:1px solid var(--border);border-radius:10px;padding:9px 14px;font-size:0.88rem;cursor:pointer;flex:1;justify-content:center;}
.calc-radio input{accent-color:var(--teal);}
.calc-submit{grid-column:1 / -1;background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#04211E;border:none;border-radius:10px;padding:11px;font-weight:800;font-size:0.92rem;cursor:pointer;margin-top:2px;}
.pillar-chronic .calc-submit{background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#04212E;}
.pillar-ckm .calc-submit{background:linear-gradient(135deg,var(--ckm),var(--ckm-dark));color:#fff;}
.pillar-lc .calc-submit{background:linear-gradient(135deg,var(--lc),var(--lc-dark));color:#3A2600;}
.calc-submit:hover{opacity:0.92;}
.calc-result{display:flex;align-items:center;justify-content:center;min-height:110px;}
.calc-result:not(.show)::before{content:'填好左邊的資料，按下按鈕看結果 →';color:var(--text-faint);font-size:0.83rem;text-align:center;}
.calc-result.show{display:block;width:100%;}
.calc-result-grid{display:grid;gap:10px;}
.calc-result-item{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.calc-result-highlight{border-color:var(--teal-dark);background:rgba(2,195,154,0.08);}
.calc-result-label{font-size:0.8rem;color:var(--text-dim);}
.calc-result-value{font-size:1.25rem;font-weight:900;color:var(--mint);white-space:nowrap;}
.calc-result-value small{font-size:0.66rem;font-weight:600;color:var(--text-dim);}
.calc-pass{color:var(--mint);font-weight:800;font-size:0.8rem;white-space:nowrap;}
.calc-fail{color:var(--amber);font-weight:800;font-size:0.8rem;white-space:nowrap;}
.calc-disclaimer{font-size:0.72rem;color:var(--text-faint);margin-top:10px;line-height:1.6;}

/* ── Assistant ── */
.assistant-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.a-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;}
.a-ic{font-size:1.4rem;margin-bottom:10px;}
.a-card h4{font-size:0.93rem;margin-bottom:6px;}
.a-card p{color:var(--text-dim);font-size:0.8rem;}

/* ── Disclaimer bar ── */
.disclaimer-bar{position:fixed;bottom:0;left:0;right:0;z-index:60;background:var(--bg-elev);border-top:1px solid var(--border);}
.disclaimer-toggle{width:100%;background:none;border:none;color:var(--text-faint);display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 24px;font-size:0.76rem;cursor:pointer;text-align:left;max-width:var(--maxw);margin:0 auto;}
.disclaimer-toggle strong{color:var(--amber);}
.disclaimer-bar.collapsed .disclaimer-toggle span:first-child{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.chevron{transition:transform .2s;flex-shrink:0;}
.disclaimer-bar.collapsed .chevron{transform:rotate(180deg);}

/* ── Chat FAB ── */
.chat-fab{position:fixed;right:24px;bottom:76px;z-index:70;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--teal),var(--blue));color:#04211E;border:none;font-size:1.4rem;font-weight:900;cursor:pointer;box-shadow:0 6px 20px rgba(2,195,154,0.3);}
.chat-fab:hover{transform:scale(1.06);}
.chat-panel{position:fixed;right:24px;bottom:140px;z-index:70;width:370px;max-width:90vw;height:490px;max-height:70vh;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,0.5);opacity:0;pointer-events:none;transform:translateY(16px);transition:opacity .18s, transform .18s;}
.chat-panel.open{opacity:1;pointer-events:auto;transform:translateY(0);}
.chat-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);background:var(--card);}
.chat-title{font-weight:800;font-size:0.94rem;}
.chat-sub{font-size:0.71rem;color:var(--text-faint);}
.chat-close{background:none;border:none;color:var(--text-dim);font-size:1rem;cursor:pointer;}
.chat-messages{flex:1;overflow-y:auto;padding:14px 16px;display:flex;flex-direction:column;gap:10px;}
.msg{max-width:85%;padding:10px 13px;border-radius:12px;font-size:0.84rem;white-space:pre-wrap;line-height:1.5;}
.msg.bot{background:var(--card);align-self:flex-start;border:1px solid var(--border);}
.msg.user{background:var(--teal-dark);color:#fff;align-self:flex-end;}
.msg.flag{background:rgba(231,111,81,0.15);border:1px solid var(--amber-dk);align-self:flex-start;}
.chat-quick{display:flex;gap:6px;padding:0 16px 10px;flex-wrap:wrap;}
.chat-quick button{background:var(--card);border:1px solid var(--border);color:var(--text-dim);font-size:0.72rem;padding:5px 10px;border-radius:20px;cursor:pointer;}
.chat-quick button:hover{border-color:var(--teal);color:var(--text);}
.chat-input-row{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);}
.chat-input-row input{flex:1;background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:9px 12px;font-size:0.84rem;}
.chat-input-row input:focus{outline:1px solid var(--teal);}
.chat-input-row button{background:var(--teal);color:#04211E;border:none;border-radius:10px;padding:0 16px;font-weight:800;font-size:0.84rem;cursor:pointer;}

/* ── Detail Modal (shared by all card types) ── */
.detail-modal{position:fixed;inset:0;z-index:80;background:rgba(5,10,17,0.72);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;pointer-events:none;transition:opacity .18s;}
.detail-modal.open{opacity:1;pointer-events:auto;}
.detail-modal-inner{position:relative;background:var(--bg-elev);border:1px solid var(--border);border-radius:18px;max-width:680px;width:100%;max-height:85vh;overflow-y:auto;padding:32px 32px 28px;box-shadow:0 24px 60px rgba(0,0,0,0.55);}
.detail-modal-close{position:absolute;top:16px;right:16px;background:var(--card);border:1px solid var(--border);color:var(--text-dim);width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:0.95rem;}
.detail-modal-close:hover{color:var(--text);}
.detail-modal-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:20px;padding-right:32px;}
.detail-modal-stage{color:var(--text-dim);font-size:0.8rem;margin-bottom:4px;}
.detail-modal-head h3{font-size:1.25rem;line-height:1.4;}
#detailModalBody p{color:var(--text-dim);font-size:0.92rem;line-height:1.8;margin-bottom:14px;}
#detailModalBody p b{color:var(--mint);font-weight:700;}
.detail-modal-hw{margin-top:16px;padding:14px 16px;background:var(--card);border-radius:12px;font-size:0.86rem;color:var(--text);}
.detail-modal-hw b{color:var(--mint);}
.detail-modal-extra{margin-top:12px;font-size:0.84rem;color:var(--text-dim);}
.detail-modal-source{margin-top:16px;font-size:0.74rem;color:var(--text-faint);border-top:1px dashed var(--border);padding-top:12px;}

@media (max-width:800px){
  .nav-inner{flex-wrap:wrap;padding:12px 16px;gap:10px;}
  .nav-links{width:100%;order:3;overflow-x:auto;flex-wrap:nowrap;gap:16px;scrollbar-width:none;}
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-links a{white-space:nowrap;}
  .nav-actions{width:100%;order:2;}
  .search{width:100%;}
  .pillar-nav{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:1fr;}
  .assistant-cards{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:1.6rem;}
  .calc-panel.active{grid-template-columns:1fr;}
  .calc-form{grid-template-columns:1fr;}
}