:root{
  --navy:#1428A0;
  --navy-dark:#0e1f7c;
  --navy-50:#eef0fb;
  --charcoal:#2C3E50;
  --charcoal-soft:#4a5b6e;
  --gold:#D4A943;
  --gold-soft:#f3e3b3;
  --line:#e5e8ef;
  --bg:#f6f8fc;
  --white:#ffffff;
  --muted:#7a8699;
  --danger:#c0392b;
  --success:#1e8449;
  --warn:#b9770e;
  --shadow:0 1px 2px rgba(20,40,160,.04), 0 8px 24px rgba(20,40,160,.06);
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0;padding:0;overflow-x:hidden;max-width:100%}
img,svg,video,canvas,iframe{max-width:100%}
.card,.kpi,.k-card,.book,.profile-card,.modal{min-width:0;max-width:100%}
.card,.kpi,.book{overflow-wrap:anywhere;word-break:break-word}
table{max-width:100%}
body{
  font-family: "Pretendard","Inter","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  color:var(--charcoal);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}

/* ===== Security banner ===== */
.sec-banner{
  background:linear-gradient(90deg,#0b1b75,#1428A0);
  color:#fff;
  font-size:12.5px;
  padding:7px 16px;
  display:flex;align-items:center;justify-content:center;gap:8px;
  letter-spacing:.2px;
}
.sec-banner .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 3px rgba(212,169,67,.25)}

/* ===== Top nav ===== */
header.topbar{
  background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.nav{
  max-width:1240px;margin:0 auto;padding:12px 20px;
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:18px}
.brand-mark{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--navy),#3a4cd6);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:14px;
  letter-spacing:.3px;
}
.brand-sub{font-size:11px;color:var(--muted);font-weight:500;margin-left:6px}
.nav-links{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.nav-links a{
  padding:8px 12px;border-radius:8px;color:var(--charcoal);font-weight:600;font-size:14px;
}
.nav-links a:hover{background:var(--navy-50);text-decoration:none;color:var(--navy)}
.nav-links a.active{background:var(--navy);color:#fff}
.nav-right{display:flex;align-items:center;gap:10px}
.nav-emp{
  font-size:13px;color:var(--charcoal-soft);
  background:#f0f3fa;padding:6px 12px;border-radius:999px;border:1px solid var(--line);
  white-space:nowrap;
}

/* ===== Buttons / chips / inputs ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border-radius:8px;border:1px solid transparent;
  font-weight:600;font-size:14px;cursor:pointer;background:#fff;color:var(--charcoal);
  transition:transform .04s ease, box-shadow .2s ease, background .15s ease;
}
.btn:hover{box-shadow:var(--shadow)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-dark)}
.btn-gold{background:var(--gold);color:#3b2c08}
.btn-gold:hover{background:#c89a36}
.btn-outline{background:#fff;border-color:var(--line);color:var(--charcoal)}
.btn-outline:hover{border-color:var(--navy);color:var(--navy)}
.btn-ghost{background:transparent;color:var(--charcoal)}
.btn-danger{background:#fff;color:var(--danger);border-color:#f5d4cf}
.btn-sm{padding:6px 10px;font-size:12.5px;border-radius:6px}
.btn:disabled{opacity:.55;cursor:not-allowed}

.chip{
  display:inline-flex;align-items:center;gap:4px;
  padding:4px 10px;border-radius:999px;
  background:#f0f3fa;color:var(--charcoal-soft);
  font-size:12px;font-weight:600;border:1px solid var(--line);
}
.chip-navy{background:var(--navy-50);color:var(--navy);border-color:#d4dcf5}
.chip-gold{background:#fff8e6;color:#85620e;border-color:#f0dba4}
.chip-green{background:#e6f5ec;color:var(--success);border-color:#cae8d5}
.chip-red{background:#fdecea;color:var(--danger);border-color:#f5d4cf}

.input,.select,.textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;background:#fff;color:var(--charcoal);
  font-family:inherit;
}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(20,40,160,.1)}
.textarea{resize:vertical;min-height:140px;line-height:1.55}
label.field{display:block;margin-bottom:14px}
label.field>.lbl{display:block;font-size:13px;font-weight:600;color:var(--charcoal);margin-bottom:6px}
label.field>.hint{font-size:11.5px;color:var(--muted);margin-top:4px}

/* ===== Layout helpers ===== */
.container{max-width:1240px;margin:0 auto;padding:24px 20px}
.page-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap;
}
.page-head h1{margin:0;font-size:24px;color:var(--charcoal);font-weight:800;letter-spacing:-.3px}
.page-head .sub{color:var(--muted);font-size:14px;margin-top:4px}
.grid{display:grid;gap:16px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* ===== Cards ===== */
.card{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:18px;
  min-width:0;max-width:100%;
}
.card table{table-layout:fixed;width:100%;word-break:keep-all;overflow-wrap:anywhere}
.card-pad{padding:0}
.card h3{margin:0 0 8px;font-size:16px;font-weight:800;color:var(--charcoal)}
.card .meta{color:var(--muted);font-size:12.5px}
.kpi{
  display:flex;flex-direction:column;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;
}
.kpi .label{font-size:12.5px;color:var(--muted);font-weight:600;text-transform:none}
.kpi .value{font-size:24px;font-weight:800;color:var(--charcoal);letter-spacing:-.4px}
.kpi .delta{font-size:12px;color:var(--success);font-weight:600}

/* ===== Knowledge card ===== */
.k-card{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);overflow:hidden;cursor:pointer;
  display:flex;flex-direction:column;
  transition:transform .15s ease, border-color .15s ease;
}
.k-card:hover{transform:translateY(-2px);border-color:#cbd4ef}
.k-thumb{
  height:140px;background:linear-gradient(135deg,#dbe1f4,#f4f1e6);
  display:flex;align-items:center;justify-content:center;color:var(--charcoal);
  font-size:38px;font-weight:800;letter-spacing:-1px;
  position:relative;
}
.k-thumb .process-tag{
  position:absolute;top:10px;left:10px;
  background:rgba(20,40,160,.85);color:#fff;font-size:11.5px;font-weight:700;
  padding:4px 8px;border-radius:6px;letter-spacing:.3px;
}
.k-thumb .status-tag{
  position:absolute;top:10px;right:10px;
  background:rgba(255,255,255,.95);color:var(--charcoal);font-size:11px;font-weight:700;
  padding:4px 8px;border-radius:6px;border:1px solid var(--line);
}
.k-body{padding:14px 16px;flex:1;display:flex;flex-direction:column;gap:8px}
.k-title{font-weight:700;font-size:15px;color:var(--charcoal);line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.k-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin-top:auto}
.k-stats{display:flex;gap:10px;align-items:center}
.k-stats span{display:inline-flex;align-items:center;gap:4px}

/* ===== Filters ===== */
.filters{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;
  display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px;
}
.filters .search{flex:1;min-width:200px;position:relative}
.filters .search input{padding-left:36px}
.filters .search::before{
  content:"";position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:14px;height:14px;border:2px solid var(--muted);border-radius:50%;
}
.filters .search::after{
  content:"";position:absolute;left:24px;top:50%;width:7px;height:2px;background:var(--muted);
  transform:translateY(2px) rotate(45deg);transform-origin:left;
}

/* ===== Modal ===== */
.modal-overlay{
  position:fixed;inset:0;background:rgba(20,30,60,.45);
  display:none;align-items:center;justify-content:center;z-index:100;
  padding:20px;
}
.modal-overlay.is-open{display:flex}
.modal{
  background:#fff;border-radius:14px;max-width:680px;width:100%;
  max-height:90vh;overflow-y:auto;box-shadow:0 24px 64px rgba(0,0,0,.25);
}
.modal-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 22px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;border-radius:14px 14px 0 0;
}
.modal-head h3{margin:0;font-size:18px}
.modal-body{padding:22px}
.modal-foot{padding:14px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px;position:sticky;bottom:0;background:#fff;border-radius:0 0 14px 14px}
.modal-close{
  background:transparent;border:none;font-size:22px;color:var(--muted);cursor:pointer;line-height:1;
  width:32px;height:32px;border-radius:6px;
}
.modal-close:hover{background:var(--bg)}

/* ===== Toast ===== */
.toast-wrap{position:fixed;top:20px;right:20px;z-index:200;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{
  background:var(--charcoal);color:#fff;padding:12px 18px;border-radius:8px;
  box-shadow:0 8px 24px rgba(0,0,0,.2);font-size:14px;font-weight:500;
  animation:toast-in .22s ease, toast-out .35s ease 2.4s forwards;
  max-width:340px;
}
.toast.success{background:var(--success)}
.toast.error{background:var(--danger)}
.toast.warn{background:var(--warn)}
@keyframes toast-in{from{transform:translateY(-12px);opacity:0}to{transform:translateY(0);opacity:1}}
@keyframes toast-out{to{transform:translateY(-12px);opacity:0}}

/* ===== Tabs ===== */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:18px;overflow-x:auto}
.tab{
  padding:10px 16px;border:none;background:transparent;cursor:pointer;
  font-weight:600;font-size:14px;color:var(--charcoal-soft);
  border-bottom:2px solid transparent;white-space:nowrap;
}
.tab:hover{color:var(--navy)}
.tab.active{color:var(--navy);border-bottom-color:var(--navy)}

/* ===== Detail page ===== */
.detail-grid{display:grid;grid-template-columns:1fr 320px;gap:18px}
.detail-main{display:flex;flex-direction:column;gap:18px}
.detail-side{display:flex;flex-direction:column;gap:14px}
.detail-head{padding:22px}
.detail-title{font-size:22px;font-weight:800;color:var(--charcoal);margin:6px 0 12px;line-height:1.3}
.author-row{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.author{display:flex;align-items:center;gap:10px}
.avatar{
  width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,var(--navy),var(--gold));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;
}
.section{padding:22px}
.section h2{margin:0 0 12px;font-size:16px;font-weight:800;color:var(--charcoal);
  display:flex;align-items:center;gap:8px}
.section h2::before{content:"";width:4px;height:18px;background:var(--navy);border-radius:2px}
.section.safety h2::before{background:var(--danger)}
.section.training h2::before{background:var(--gold)}
.step{
  display:flex;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:8px;
  margin-bottom:8px;background:#fafbfd;
}
.step-num{
  width:28px;height:28px;border-radius:50%;
  background:var(--navy);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:13px;
}
.step-text{flex:1;color:var(--charcoal);font-size:14px}
.safety-item{
  display:flex;gap:10px;padding:10px 14px;border-left:3px solid var(--danger);background:#fdf3f2;border-radius:0 8px 8px 0;
  margin-bottom:6px;font-size:14px;color:#7a2920;
}
.tag{
  display:inline-block;padding:4px 10px;border-radius:6px;background:var(--navy-50);
  color:var(--navy);font-size:12px;font-weight:600;margin:0 6px 6px 0;
}
.attachment{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
.attachment img{
  width:160px;height:120px;object-fit:cover;border-radius:8px;border:1px solid var(--line);
}
.placeholder-img{
  width:160px;height:120px;border-radius:8px;border:1px dashed var(--line);
  background:#f0f3fa;color:var(--muted);
  display:flex;align-items:center;justify-content:center;font-size:12px;
}

.comment{
  border-top:1px solid var(--line);padding:12px 0;display:flex;gap:10px;
}
.comment:first-child{border-top:0}
.comment-body{flex:1}
.comment-meta{font-size:12px;color:var(--muted);margin-bottom:4px}
.comment-text{font-size:14px;color:var(--charcoal)}

/* ===== Grades / ranks ===== */
.grade{
  display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.3px;
}
.grade-bronze{background:#f2e3d4;color:#8a5a2c}
.grade-silver{background:#e7eaef;color:#586172}
.grade-gold{background:#fff1c3;color:#85620e}
.grade-platinum{background:#dff0ea;color:#1b6e57}
.grade-diamond{background:#dbe9ff;color:#1a3aa0}

.rank-row{
  display:grid;grid-template-columns:48px 1fr auto auto;gap:12px;align-items:center;
  padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:8px;
}
.rank-num{
  width:36px;height:36px;border-radius:50%;background:var(--bg);color:var(--charcoal);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;
}
.rank-num.top1{background:linear-gradient(135deg,#fff1c3,#D4A943);color:#664b08}
.rank-num.top2{background:linear-gradient(135deg,#eef2f8,#b9c3d1);color:#3a4458}
.rank-num.top3{background:linear-gradient(135deg,#f7dec2,#cd915b);color:#5a3416}
.rank-name{font-weight:700;color:var(--charcoal)}
.rank-dept{font-size:12px;color:var(--muted)}
.rank-pts{font-weight:800;color:var(--navy);font-size:15px}

/* ===== Manual / book ===== */
.book{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:32px 40px;min-height:520px;position:relative;
}
.book-head{display:flex;justify-content:space-between;align-items:center;border-bottom:2px solid var(--navy);padding-bottom:14px;margin-bottom:18px}
.book-process{font-size:22px;font-weight:800;color:var(--navy)}
.book-page{font-size:12px;color:var(--muted)}
.book-entry{
  padding:18px 0;border-bottom:1px dashed var(--line);
}
.book-entry:last-child{border-bottom:0}
.book-entry h4{margin:0 0 6px;font-size:16px;color:var(--charcoal)}
.book-entry .author-line{font-size:12px;color:var(--muted);margin-bottom:10px}
.book-pager{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:8px}
.book-toc{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;
  display:flex;flex-direction:column;gap:4px;
}
.book-toc a{
  padding:10px 12px;border-radius:8px;color:var(--charcoal);font-weight:600;font-size:14px;
  display:flex;justify-content:space-between;align-items:center;
}
.book-toc a:hover{background:var(--navy-50);text-decoration:none}
.book-toc a.active{background:var(--navy);color:#fff}
.book-toc a.active .pill{background:#fff;color:var(--navy)}
.pill{background:var(--bg);color:var(--charcoal-soft);font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px}

/* ===== Misc ===== */
.empty{
  background:#fff;border:1px dashed var(--line);border-radius:12px;
  padding:48px 20px;text-align:center;color:var(--muted);
}
.empty h3{color:var(--charcoal);margin:0 0 6px;font-size:16px}
.divider{height:1px;background:var(--line);margin:18px 0}
.kbd{
  background:var(--bg);border:1px solid var(--line);border-radius:4px;padding:1px 6px;font-size:11.5px;color:var(--charcoal-soft);
}
.ai-card{
  border-left:4px solid var(--navy);background:#fafbfd;padding:14px 16px;border-radius:0 10px 10px 0;
}
.ai-card .ai-head{
  font-size:12px;font-weight:700;color:var(--navy);letter-spacing:.5px;margin-bottom:8px;display:flex;align-items:center;gap:6px;
}
.ai-card .ai-head::before{
  content:"AI";display:inline-block;background:var(--navy);color:#fff;font-size:10px;padding:2px 6px;border-radius:4px;
}
.points-pill{
  display:inline-flex;align-items:center;gap:6px;
  background:linear-gradient(135deg,#fff8e6,#f3e3b3);
  color:#664b08;font-weight:800;padding:4px 12px;border-radius:999px;border:1px solid #f0dba4;
  font-size:13px;
}
.muted{color:var(--muted)}
.text-right{text-align:right}
.spacer{flex:1}

/* preview image strip */
.file-grid{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.file-thumb{
  position:relative;width:80px;height:80px;border-radius:8px;border:1px solid var(--line);overflow:hidden;background:#fff;
}
.file-thumb img{width:100%;height:100%;object-fit:cover}
.file-thumb .x{
  position:absolute;top:2px;right:2px;background:rgba(0,0,0,.6);color:#fff;border:none;
  width:20px;height:20px;border-radius:50%;cursor:pointer;font-size:12px;line-height:18px;text-align:center;
}

/* mypage profile */
.profile-card{
  background:linear-gradient(135deg,#1428A0,#0e1f7c);color:#fff;
  border-radius:14px;padding:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
}
.profile-card .name{font-size:22px;font-weight:800}
.profile-card .dept{font-size:13px;opacity:.85;margin-top:4px}
.profile-card .pts{font-size:30px;font-weight:800;color:var(--gold)}
.profile-card .krw{font-size:13px;opacity:.85}

/* ===== Idea-bank hero (홈) ===== */
.hero-bank{
  background:linear-gradient(135deg,#0e1f7c 0%, #1428A0 55%, #3a4cd6 100%);
  color:#fff;border-radius:14px;padding:26px 28px;margin-bottom:18px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:22px;align-items:center;
  box-shadow:0 12px 30px rgba(20,40,160,.22);
  overflow:hidden;position:relative;
}
.hero-bank::after{
  content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;
  background:radial-gradient(closest-side, rgba(212,169,67,.35), transparent 70%);
  pointer-events:none;
}
.hero-bank h1{margin:0 0 8px;font-size:26px;font-weight:800;letter-spacing:-.4px;line-height:1.25}
.hero-bank .hero-sub{opacity:.88;font-size:14px;line-height:1.7;margin-bottom:14px}
.hero-bank .hero-cta{display:flex;gap:8px;flex-wrap:wrap}
.hero-bank .hero-cta .btn{border:1px solid rgba(255,255,255,.35)}
.hero-bank .hero-cta .btn-primary{background:var(--gold);color:#3b2c08;border-color:transparent}
.hero-bank .hero-cta .btn-primary:hover{background:#c89a36}
.hero-bank .hero-cta .btn-outline{background:transparent;color:#fff}
.hero-bank .hero-cta .btn-outline:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.hero-stats{
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);
  border-radius:12px;padding:14px;display:grid;grid-template-columns:1fr 1fr;gap:12px;
  backdrop-filter:blur(2px);
}
.hero-stats .cell{display:flex;flex-direction:column;gap:2px}
.hero-stats .cell .lbl{font-size:11.5px;opacity:.78;letter-spacing:.3px}
.hero-stats .cell .val{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.4px}
.hero-stats .cell .val.gold{color:var(--gold)}

.hero-badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.hero-badges .hb{
  background:rgba(255,255,255,.14);color:#fff;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;border:1px solid rgba(255,255,255,.22);
}

/* ===== Value strip (홈 3-value 카드) ===== */
.value-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px;
}
@media (max-width:960px){ .value-strip{grid-template-columns:1fr} }
.value-strip .vs-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;min-width:0;
}
.value-strip .vs-title{font-weight:800;color:var(--navy);font-size:15px}
.value-strip .vs-desc{font-size:13px;color:var(--charcoal-soft);line-height:1.65}
.value-strip .vs-cta{
  align-self:flex-start;margin-top:2px;color:var(--navy);font-weight:700;font-size:13px;
}
.value-strip .vs-cta:hover{text-decoration:underline}

/* AI-학습 대상 뱃지 */
.ai-learn-badge{
  display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;
  background:linear-gradient(90deg,#0e1f7c,#3a4cd6);color:#fff;
  font-size:11px;font-weight:800;letter-spacing:.3px;border:none;
}
.ai-learn-badge::before{
  content:"AI";background:var(--gold);color:#3b2c08;font-size:9.5px;font-weight:900;
  padding:1px 5px;border-radius:4px;letter-spacing:.4px;
}

/* ===== AI 채팅 ===== */
.chat-shell{
  display:grid;grid-template-columns:260px 1fr;gap:14px;
  height:calc(100vh - 210px);min-height:520px;
}
@media (max-width:960px){
  .chat-shell{grid-template-columns:1fr;height:auto;min-height:0}
  .chat-side{max-height:220px;overflow-y:auto}
}
.chat-side{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px;display:flex;flex-direction:column;gap:6px;min-height:0;
}
.chat-side h4{margin:2px 4px 8px;font-size:12px;color:var(--muted);letter-spacing:.3px;font-weight:700;text-transform:uppercase}
.chat-new-btn{
  display:flex;align-items:center;justify-content:center;gap:6px;
  padding:10px;border-radius:8px;background:var(--navy);color:#fff;
  border:none;font-weight:700;font-size:13.5px;cursor:pointer;margin-bottom:6px;
}
.chat-new-btn:hover{background:var(--navy-dark)}
.chat-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto;min-height:0}
.chat-list a{
  padding:10px 12px;border-radius:8px;color:var(--charcoal);
  font-size:13px;font-weight:600;line-height:1.4;
  display:flex;justify-content:space-between;align-items:center;gap:8px;
}
.chat-list a:hover{background:var(--navy-50);text-decoration:none}
.chat-list a.active{background:var(--navy);color:#fff}
.chat-list a.active .muted{color:rgba(255,255,255,.75)}
.chat-list .title-line{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-list .meta-line{font-size:11px;color:var(--muted);white-space:nowrap}

.chat-main{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  display:flex;flex-direction:column;overflow:hidden;min-height:0;
}
.chat-header{
  padding:14px 18px;border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
}
.chat-header .title{font-weight:800;color:var(--charcoal);font-size:15px}
.chat-header .learn-note{font-size:12px;color:var(--muted)}
.chat-header .learn-note strong{color:var(--navy)}

.chat-scroll{flex:1;overflow-y:auto;padding:18px 22px;background:#fafbfd;min-height:220px}
.chat-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:36px 12px;text-align:center;color:var(--charcoal-soft);
}
.chat-empty .badge-title{
  background:var(--navy-50);color:var(--navy);border:1px solid #d4dcf5;
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.3px;
}
.chat-empty h2{margin:0;font-size:20px;color:var(--charcoal);font-weight:800}
.chat-empty p{max-width:520px;font-size:13.5px;line-height:1.7;margin:0}
.chat-suggests{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;max-width:560px;margin-top:8px}
@media (max-width:640px){.chat-suggests{grid-template-columns:1fr}}
.chat-suggest{
  border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:12px 14px;cursor:pointer;font-size:13px;color:var(--charcoal);
  text-align:left;font-family:inherit;line-height:1.5;
  transition:border-color .1s ease,box-shadow .15s ease;
}
.chat-suggest:hover{border-color:var(--navy);box-shadow:var(--shadow)}
.chat-suggest strong{color:var(--navy);font-size:11.5px;letter-spacing:.3px;display:block;margin-bottom:2px;text-transform:uppercase}

.chat-msg{display:flex;gap:10px;margin-bottom:16px;align-items:flex-start}
.chat-msg.user{flex-direction:row-reverse}
.chat-msg .avatar-sm{
  width:32px;height:32px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:#fff;
}
.chat-msg.user .avatar-sm{background:linear-gradient(135deg,#4a5b6e,#2C3E50)}
.chat-msg.ai .avatar-sm{background:linear-gradient(135deg,var(--navy),var(--gold));font-size:10px}
.chat-msg .bubble{
  max-width:min(760px, 82%);
  padding:12px 16px;border-radius:14px;font-size:14px;line-height:1.65;
  white-space:pre-wrap;word-break:break-word;
}
.chat-msg.user .bubble{background:var(--navy);color:#fff;border-bottom-right-radius:4px}
.chat-msg.ai .bubble{background:#fff;color:var(--charcoal);border:1px solid var(--line);border-bottom-left-radius:4px}
.chat-msg.ai .bubble .thinking{color:var(--muted);font-style:italic;display:inline-flex;align-items:center;gap:6px}
.chat-msg.ai .bubble .thinking::after{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--navy);
  animation:blink 1s infinite ease-in-out;
}
@keyframes blink{0%,100%{opacity:.2}50%{opacity:1}}

.source-cards{margin-top:10px;display:flex;flex-direction:column;gap:6px}
.source-card{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;
  font-size:13px;color:inherit;
}
a.source-card:hover{border-color:var(--navy);text-decoration:none}
.source-card.is-demo{background:#fdfaf1;border-color:#f0dba4}
.source-card .src-title{font-weight:700;color:var(--charcoal);display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap}
.source-card .src-sub{font-size:11.5px;color:var(--muted);margin-top:2px}
.source-card .src-tier{font-size:11px;font-weight:800;color:var(--gold);white-space:nowrap}
.source-card .src-demo{
  font-size:10.5px;font-weight:800;letter-spacing:.2px;
  background:#fff3d1;color:#7a5b0d;border:1px solid #f0dba4;
  padding:1px 6px;border-radius:999px;
}
.chat-msg.ai .bubble .demo-note{
  margin-top:8px;padding:6px 10px;border-radius:6px;
  background:#fdfaf1;border:1px dashed #e5c76b;color:#7a5b0d;
  font-size:11.5px;font-weight:600;
}
.chat-msg.ai .bubble .engine-note{
  margin-top:8px;padding:6px 10px;border-radius:6px;
  display:inline-flex;align-items:center;gap:8px;
  font-size:11.5px;font-weight:700;letter-spacing:.1px;
}
.chat-msg.ai .bubble .engine-note .dot{
  width:7px;height:7px;border-radius:50%;flex:0 0 auto;
}
.chat-msg.ai .bubble .engine-llm{
  background:#eaf7ee;border:1px solid #b7dcc1;color:#1e8449;
}
.chat-msg.ai .bubble .engine-llm .dot{background:#1e8449;box-shadow:0 0 0 3px rgba(30,132,73,.18)}
.chat-msg.ai .bubble .engine-tpl{
  background:#fdecea;border:1px solid #f4c1bd;color:#a03426;
}
.chat-msg.ai .bubble .engine-tpl .dot{background:#c0392b;box-shadow:0 0 0 3px rgba(192,57,43,.18)}

.chat-input{
  border-top:1px solid var(--line);padding:12px 14px;
  display:flex;gap:8px;align-items:flex-end;background:#fff;
}
.chat-input textarea{
  flex:1;resize:none;border:1px solid var(--line);border-radius:10px;
  padding:10px 12px;font-family:inherit;font-size:14px;color:var(--charcoal);
  min-height:44px;max-height:180px;line-height:1.5;background:#fff;
}
.chat-input textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(20,40,160,.1)}
.chat-input .btn{height:44px}

/* ===== Mobile ===== */
@media (max-width:960px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .detail-grid{grid-template-columns:1fr}
}
@media (max-width:960px){
  .hero-bank{grid-template-columns:1fr;padding:22px 20px}
  .hero-bank h1{font-size:22px}
}
@media (max-width:640px){
  .hero-bank{padding:20px 18px}
  .hero-bank h1{font-size:20px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .nav{gap:10px;padding:10px 14px;flex-wrap:wrap}
  .nav-links{order:3;width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px;-webkit-overflow-scrolling:touch}
  .nav-links a{padding:6px 10px;font-size:13px}
  .nav-right{margin-left:auto}
  .container{padding:18px 14px}
  .page-head h1{font-size:20px}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .filters{padding:10px}
  .modal{max-height:94vh}
  .modal-body{padding:18px}
  .modal-head{padding:14px 18px}
  .modal-foot{padding:12px 18px;flex-direction:column-reverse}
  .modal-foot .btn{width:100%}
  .book{padding:20px}
  .rank-row{grid-template-columns:40px 1fr auto;gap:10px}
  .rank-row .rank-dept{display:none}
  .profile-card{flex-direction:column;align-items:flex-start}
  .author-row{flex-direction:column;align-items:flex-start}
  .attachment img,.placeholder-img{width:100%;height:160px}
  .detail-side{order:-1}
  .grid[style*="grid-template-columns"]{
    grid-template-columns:1fr !important;
  }
  section.card,div.card,.card{padding:14px}
  .filters .select{max-width:100% !important;width:100%}
  .filters{flex-direction:column;align-items:stretch}
  .filters .search{width:100%}
  .file-thumb{width:64px;height:64px}
  .book{padding:18px}
  .book-head{flex-direction:column;align-items:flex-start;gap:6px}
}