/* ================= BỨT PHÁ 10 — giao diện ================= */
:root{
  --pri:#5b5bd6; --pri-2:#7c6cf5; --pri-soft:#eef0ff;
  --ok:#16a34a; --ok-soft:#e7f8ec;
  --bad:#e11d48; --bad-soft:#ffe9ee;
  --warn:#f59e0b; --warn-soft:#fff4e0;
  --toan:#3b82f6; --van:#f59e0b; --nentang:#10b981;
  --bg:#f5f6fb; --card:#fff; --line:#e6e8f2;
  --txt:#1c1e2b; --mut:#6b7194; --mut2:#9aa0bd;
  --r:18px; --r-sm:12px;
  --sh:0 2px 4px rgba(28,30,43,.04),0 8px 24px rgba(28,30,43,.06);
  --sh-lg:0 12px 40px rgba(60,50,160,.16);
  --nav-h:66px;
  font-size:16px;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#12131c;--card:#1b1d29;--line:#2b2e40;--txt:#eceefb;--mut:#a2a8c9;--mut2:#767ca0;
        --pri-soft:#232449;--ok-soft:#14301f;--bad-soft:#3a1220;--warn-soft:#3a2a0e;
        --sh:0 2px 4px rgba(0,0,0,.2),0 8px 24px rgba(0,0,0,.25)}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--txt);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  overscroll-behavior-y:none;
}
img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--pri);text-decoration:none}

/* ---------- Khởi động ---------- */
.boot{height:100vh;display:grid;place-content:center;text-align:center;color:var(--mut)}
.boot-logo{font-size:64px;animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.15)}}

/* ---------- Bố cục ---------- */
.shell{display:flex;min-height:100vh}
.side{
  width:236px;flex:0 0 236px;background:var(--card);border-right:1px solid var(--line);
  padding:20px 14px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:6px;
}
.side .brand{font-weight:900;font-size:20px;letter-spacing:-.4px;padding:6px 10px 18px;display:flex;align-items:center;gap:8px}
.side a.nav{
  display:flex;align-items:center;gap:11px;padding:11px 13px;border-radius:13px;color:var(--mut);
  font-weight:600;font-size:15px;transition:.15s;
}
.side a.nav:hover{background:var(--pri-soft);color:var(--pri)}
.side a.nav.on{background:linear-gradient(90deg,var(--pri),var(--pri-2));color:#fff;box-shadow:0 6px 16px rgba(91,91,214,.32)}
.side .spacer{flex:1}
.main{flex:1;min-width:0;padding:26px 30px 60px;max-width:1160px;margin:0 auto;width:100%}
.tabbar{display:none}

@media (max-width:860px){
  .side{display:none}
  .main{padding:14px 14px calc(var(--nav-h) + 26px)}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:var(--nav-h);z-index:60;
    background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
  }
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
            font-size:11px;font-weight:600;color:var(--mut2)}
  .tabbar a .ic{font-size:21px;line-height:1}
  .tabbar a.on{color:var(--pri)}
}

/* ---------- Thanh trên ---------- */
.topbar{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.topbar h1{font-size:26px;margin:0;letter-spacing:-.5px;font-weight:800;flex:1;min-width:0}
.topbar .sub{color:var(--mut);font-size:14px;margin:2px 0 0;font-weight:500}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
  background:var(--pri-soft);color:var(--pri);font-size:13px;font-weight:700;white-space:nowrap;
}
.chip.gray{background:var(--line);color:var(--mut)}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.bad{background:var(--bad-soft);color:var(--bad)}
.chip.warn{background:var(--warn-soft);color:#b45309}

/* ---------- Thẻ ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.card + .card{margin-top:16px}
.card h2{margin:0 0 14px;font-size:18px;font-weight:800;letter-spacing:-.3px}
.card h3{margin:20px 0 8px;font-size:16px;font-weight:800}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.muted{color:var(--mut)}
.small{font-size:13.5px}
.center{text-align:center}

/* ---------- Nút ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:0;border-radius:14px;font-weight:800;font-size:15px;cursor:pointer;
  background:linear-gradient(135deg,var(--pri),var(--pri-2));color:#fff;
  box-shadow:0 5px 0 rgba(70,60,180,.45);transition:.12s;user-select:none;
}
.btn:active{transform:translateY(3px);box-shadow:0 2px 0 rgba(70,60,180,.45)}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}
.btn.ghost{background:var(--card);color:var(--pri);border:2px solid var(--line);box-shadow:0 4px 0 var(--line)}
.btn.ok{background:linear-gradient(135deg,#22c55e,#16a34a);box-shadow:0 5px 0 #12703a}
.btn.bad{background:linear-gradient(135deg,#fb7185,#e11d48);box-shadow:0 5px 0 #9f1239}
.btn.sm{padding:8px 14px;font-size:13.5px;border-radius:11px;box-shadow:0 3px 0 rgba(70,60,180,.4)}
.btn.wide{width:100%}
.btn.warn{background:linear-gradient(135deg,#fbbf24,#f59e0b);box-shadow:0 5px 0 #b45309;color:#3b2500}

/* ---------- Thanh tiến trình ---------- */
.bar{height:11px;border-radius:99px;background:var(--line);overflow:hidden}
.bar>i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--pri),var(--pri-2));
       transition:width .6s cubic-bezier(.2,.8,.2,1)}
.bar.thin{height:7px}
.bar.ok>i{background:linear-gradient(90deg,#4ade80,#16a34a)}
.bar.warn>i{background:linear-gradient(90deg,#fbbf24,#f59e0b)}

/* ---------- Đầu trang người học ---------- */
.hero{
  background:linear-gradient(135deg,#5b5bd6,#8b5cf6 55%,#ec4899);
  border-radius:24px;padding:22px 24px;color:#fff;box-shadow:var(--sh-lg);position:relative;overflow:hidden;
}
.hero:after{content:"";position:absolute;right:-40px;top:-60px;width:220px;height:220px;border-radius:50%;
            background:rgba(255,255,255,.12)}
.hero .who{display:flex;align-items:center;gap:14px;position:relative;z-index:1}
.hero .ava{width:60px;height:60px;border-radius:20px;background:rgba(255,255,255,.2);display:grid;place-content:center;font-size:32px;flex:0 0 auto}
.hero h2{margin:0;font-size:22px;font-weight:800}
.hero .rank{opacity:.92;font-size:14px;font-weight:600}
.hero .stats{display:flex;gap:20px;margin-top:16px;position:relative;z-index:1;flex-wrap:wrap}
.hero .stat b{display:block;font-size:20px;font-weight:900;line-height:1.2}
.hero .stat span{font-size:12px;opacity:.85;font-weight:600}
.hero .xpbar{margin-top:14px;position:relative;z-index:1}
.hero .xpbar .bar{background:rgba(255,255,255,.25)}
.hero .xpbar .bar>i{background:linear-gradient(90deg,#fde68a,#fbbf24)}
.hero .xpbar p{margin:6px 0 0;font-size:12.5px;opacity:.9;font-weight:600}

/* ---------- Nhiệm vụ ---------- */
.quest{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line)}
.quest:last-child{border:0}
.quest .qi{font-size:22px;width:34px;text-align:center;flex:0 0 auto}
.quest .qt{flex:1;min-width:0}
.quest .qt b{display:block;font-size:14.5px;font-weight:700}
.quest .qn{font-size:13px;font-weight:800;color:var(--mut);flex:0 0 auto}
.quest.done .qt b{color:var(--ok)}

/* ---------- Thẻ môn học ---------- */
.subj{
  display:block;border-radius:22px;padding:20px;color:#fff;position:relative;overflow:hidden;
  box-shadow:var(--sh);transition:.18s;cursor:pointer;border:0;text-align:left;width:100%;
}
.subj:hover{transform:translateY(-3px);box-shadow:var(--sh-lg)}
.subj .ic{font-size:38px;line-height:1}
.subj h3{margin:8px 0 2px;font-size:19px;font-weight:800;color:#fff}
.subj p{margin:0 0 14px;font-size:13px;opacity:.9;line-height:1.45}
.subj .bar{background:rgba(255,255,255,.3)}
.subj .bar>i{background:#fff}
.subj .meta{display:flex;justify-content:space-between;font-size:12.5px;font-weight:700;margin-top:7px;opacity:.95}

/* ---------- Chương & bài ---------- */
.chap{border:1px solid var(--line);border-radius:var(--r);background:var(--card);overflow:hidden;box-shadow:var(--sh)}
.chap + .chap{margin-top:14px}
.chap-h{display:flex;align-items:center;gap:14px;padding:16px 18px;cursor:pointer;user-select:none}
.chap-h .ic{width:46px;height:46px;border-radius:14px;display:grid;place-content:center;font-size:24px;flex:0 0 auto;color:#fff}
.chap-h .tt{flex:1;min-width:0}
.chap-h .tt b{display:block;font-size:16px;font-weight:800;letter-spacing:-.2px}
.chap-h .tt span{font-size:12.5px;color:var(--mut)}
.chap-h .pc{font-size:13px;font-weight:800;color:var(--mut)}
.chap-h .car{transition:.2s;color:var(--mut2)}
.chap.open .chap-h .car{transform:rotate(90deg)}
.chap-b{display:none;padding:0 12px 12px}
.chap.open .chap-b{display:block}
.chap-intro{font-size:13.5px;color:var(--mut);padding:0 6px 12px;line-height:1.6}

.lsn{display:flex;align-items:center;gap:12px;padding:12px 12px;border-radius:14px;transition:.13s;cursor:pointer}
.lsn:hover{background:var(--pri-soft)}
.lsn .no{width:34px;height:34px;border-radius:11px;background:var(--pri-soft);color:var(--pri);
         display:grid;place-content:center;font-weight:900;font-size:14px;flex:0 0 auto}
.lsn.done .no{background:var(--ok-soft);color:var(--ok)}
.lsn .tt{flex:1;min-width:0}
.lsn .tt b{display:block;font-size:14.7px;font-weight:700;line-height:1.35}
.lsn .tt span{font-size:12px;color:var(--mut)}
.lsn .st{font-size:13px;letter-spacing:1px;flex:0 0 auto}

/* ---------- Bài giảng ---------- */
.lesson{max-width:820px}
.lesson h2.title{font-size:25px;margin:0 0 4px;font-weight:900;letter-spacing:-.6px}
.sec{margin:22px 0}
.sec > h3{font-size:18px;margin:0 0 10px;font-weight:800;display:flex;align-items:center;gap:8px}
.sec p{margin:0 0 10px}
.sec ul,.sec ol{margin:6px 0 12px;padding-left:22px}
.sec li{margin:5px 0}
.box{border-radius:var(--r-sm);padding:14px 16px;margin:14px 0;border-left:5px solid}
.box.idea{background:var(--pri-soft);border-color:var(--pri)}
.box.tip{background:var(--ok-soft);border-color:var(--ok)}
.box.warn{background:var(--warn-soft);border-color:var(--warn)}
.box.key{background:linear-gradient(135deg,#fff7ed,#ffedd5);border-color:#f97316}
@media (prefers-color-scheme:dark){.box.key{background:linear-gradient(135deg,#3b2a12,#42260f)}}
.box b.lbl{display:block;font-size:12.5px;text-transform:uppercase;letter-spacing:.7px;margin-bottom:5px;opacity:.75}

.eg{border:2px dashed var(--line);border-radius:var(--r-sm);padding:14px 16px;margin:14px 0;background:var(--card)}
.eg .egh{font-weight:800;color:var(--pri);margin-bottom:8px;font-size:14.5px}
.eg ol{counter-reset:st;list-style:none;padding-left:0;margin:0}
.eg ol li{position:relative;padding-left:34px;margin:9px 0}
.eg ol li:before{counter-increment:st;content:counter(st);position:absolute;left:0;top:1px;
  width:24px;height:24px;border-radius:8px;background:var(--pri);color:#fff;display:grid;place-content:center;
  font-size:12.5px;font-weight:800}

.viz{margin:16px 0;padding:14px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);overflow-x:auto}
.viz svg{display:block;margin:0 auto;max-width:100%;height:auto}
.viz .cap{text-align:center;font-size:12.5px;color:var(--mut);margin-top:8px}
.viz .ctrl{display:flex;gap:10px;align-items:center;justify-content:center;margin-top:10px;flex-wrap:wrap;font-size:13px}
.viz input[type=range]{width:150px}

table.tb{width:100%;border-collapse:collapse;font-size:14.5px;margin:12px 0}
table.tb th,table.tb td{border:1px solid var(--line);padding:8px 11px;text-align:left}
table.tb th{background:var(--pri-soft);color:var(--pri);font-weight:800}
.tbwrap{overflow-x:auto}

.formula{background:var(--pri-soft);border-radius:var(--r-sm);padding:12px 16px;margin:12px 0;text-align:center;font-size:17px;overflow-x:auto}

/* ---------- Chọn mức luyện tập ---------- */
.tier{display:flex;align-items:center;gap:14px;padding:15px;border:2px solid var(--line);border-radius:var(--r);
      background:var(--card);cursor:pointer;transition:.15s;width:100%;text-align:left}
.tier:hover{border-color:var(--pri);transform:translateY(-2px)}
.tier .ic{width:46px;height:46px;border-radius:15px;display:grid;place-content:center;font-size:24px;flex:0 0 auto}
.tier .tt{flex:1;min-width:0}
.tier .tt b{display:block;font-size:15.5px;font-weight:800}
.tier .tt span{font-size:12.5px;color:var(--mut)}

/* ---------- Làm bài ---------- */
.quizbar{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.quizbar .bar{flex:1}
.quizbar .x{background:none;border:0;font-size:22px;color:var(--mut2);cursor:pointer;padding:0 4px}
.combo{font-weight:900;color:var(--warn);font-size:15px;white-space:nowrap}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--sh)}
.qstem{font-size:18px;font-weight:700;line-height:1.55;margin:0 0 18px}
.opt{display:flex;align-items:center;gap:12px;padding:14px 16px;border:2px solid var(--line);border-radius:15px;
     margin-bottom:11px;cursor:pointer;transition:.13s;background:var(--card);width:100%;text-align:left;font-size:15.5px}
.opt:hover:not(.locked){border-color:var(--pri);background:var(--pri-soft)}
.opt .k{width:30px;height:30px;border-radius:10px;background:var(--line);color:var(--mut);
        display:grid;place-content:center;font-weight:900;font-size:14px;flex:0 0 auto}
.opt.sel{border-color:var(--pri);background:var(--pri-soft)}
.opt.sel .k{background:var(--pri);color:#fff}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.right .k{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt.wrong .k{background:var(--bad);color:#fff}
.opt.locked{cursor:default}
.fillbox{display:flex;gap:10px;flex-wrap:wrap}
.fillbox input{flex:1;min-width:180px;padding:14px 16px;border:2px solid var(--line);border-radius:14px;
               background:var(--card);font-size:17px;font-weight:700}
.fillbox input:focus{outline:0;border-color:var(--pri)}

.fb{border-radius:var(--r);padding:16px 18px;margin-top:16px;animation:pop .25s ease}
.fb.right{background:var(--ok-soft);border:2px solid var(--ok)}
.fb.wrong{background:var(--bad-soft);border:2px solid var(--bad)}
.fb h4{margin:0 0 6px;font-size:16.5px;font-weight:900}
.fb .exp{font-size:14.5px;line-height:1.6}
.fb .exp b{color:inherit}
@keyframes pop{from{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}

.hintbtn{background:none;border:0;color:var(--warn);font-weight:800;font-size:14px;cursor:pointer;padding:6px 0}
.hintbox{background:var(--warn-soft);border-radius:12px;padding:11px 14px;font-size:14.5px;margin:10px 0;
         border-left:4px solid var(--warn)}

/* ---------- Kết quả ---------- */
.result{text-align:center;padding:26px 20px}
.result .big{font-size:66px;line-height:1;margin-bottom:6px}
.result h2{font-size:27px;margin:6px 0;font-weight:900}
.result .stars{font-size:38px;letter-spacing:6px;margin:8px 0}
.result .msg{color:var(--mut);font-size:15.5px;max-width:440px;margin:0 auto 18px}
.scoreRing{width:132px;height:132px;margin:0 auto 12px}

.badgepop{display:flex;align-items:center;gap:14px;background:linear-gradient(135deg,#fef3c7,#fde68a);
  border-radius:var(--r);padding:14px 16px;margin:10px 0;border:2px solid #f59e0b;color:#78350f}
.badgepop .bi{font-size:34px}
.badgepop b{display:block;font-size:15.5px}
.badgepop span{font-size:13px}

.badgegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:12px}
.bdg{text-align:center;padding:14px 8px;border-radius:16px;border:2px solid var(--line);background:var(--card)}
.bdg .bi{font-size:32px;line-height:1.2}
.bdg b{display:block;font-size:12.5px;margin-top:5px;font-weight:800}
.bdg span{font-size:11px;color:var(--mut);line-height:1.35;display:block;margin-top:3px}
.bdg.locked{opacity:.42;filter:grayscale(1)}

/* ---------- Biểu đồ hoạt động ---------- */
.spark{display:flex;align-items:flex-end;gap:6px;height:120px}
.spark .col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:5px;height:100%}
.spark .col i{display:block;width:100%;max-width:34px;border-radius:7px 7px 3px 3px;
              background:linear-gradient(180deg,var(--pri-2),var(--pri));min-height:4px;transition:height .5s}
.spark .col.zero i{background:var(--line)}
.spark .col span{font-size:11px;color:var(--mut);font-weight:700}
.heat{display:grid;grid-template-columns:repeat(15,1fr);gap:4px}
.heat i{aspect-ratio:1;border-radius:4px;background:var(--line);display:block}

/* ---------- Biểu mẫu ---------- */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--mut);margin-bottom:5px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;border:2px solid var(--line);border-radius:12px;background:var(--card);font-size:15px}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--pri)}
.field textarea{min-height:150px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13.5px;line-height:1.55}
.seg{display:inline-flex;background:var(--line);border-radius:12px;padding:3px;gap:3px;flex-wrap:wrap}
.seg button{border:0;background:none;padding:8px 15px;border-radius:10px;font-weight:700;font-size:14px;cursor:pointer;color:var(--mut)}
.seg button.on{background:var(--card);color:var(--pri);box-shadow:var(--sh)}
.checks{display:flex;gap:14px;flex-wrap:wrap}
.checks label{display:flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600}

/* ---------- Bảng ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--mut);
        padding:9px 10px;border-bottom:2px solid var(--line)}
.tbl td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}

/* ---------- Đăng nhập ---------- */
.login{min-height:100vh;display:grid;place-items:center;padding:24px;
       background:radial-gradient(1000px 600px at 50% -10%,#7c6cf5 0%,#4f46e5 40%,#312e81 100%)}
.login .box{background:var(--card);border-radius:26px;padding:30px 26px;width:100%;max-width:400px;box-shadow:var(--sh-lg)}
.login .logo{text-align:center;font-size:52px;line-height:1}
.login h1{text-align:center;font-size:25px;margin:6px 0 2px;font-weight:900;letter-spacing:-.5px}
.login p.tag{text-align:center;color:var(--mut);margin:0 0 22px;font-size:14px}
.who-list{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:18px}
.who-btn{border:2px solid var(--line);background:var(--card);border-radius:16px;padding:10px 14px;cursor:pointer;
         display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px}
.who-btn.on{border-color:var(--pri);background:var(--pri-soft);color:var(--pri)}

/* ---------- Hiệu ứng ---------- */
#fx{position:fixed;inset:0;pointer-events:none;z-index:200;overflow:hidden}
.conf{position:absolute;width:10px;height:14px;border-radius:2px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg);opacity:.1}}
.floatxp{position:fixed;font-weight:900;font-size:22px;color:var(--warn);z-index:210;pointer-events:none;
         animation:up 1.1s ease-out forwards;text-shadow:0 2px 8px rgba(0,0,0,.15)}
@keyframes up{to{transform:translateY(-70px);opacity:0}}
.shake{animation:shk .35s}
@keyframes shk{0%,100%{transform:translateX(0)}20%{transform:translateX(-8px)}40%{transform:translateX(8px)}60%{transform:translateX(-5px)}80%{transform:translateX(5px)}}

#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--nav-h) + 18px);z-index:300;
       display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:#1c1e2b;color:#fff;padding:11px 18px;border-radius:14px;font-size:14.5px;font-weight:600;
       box-shadow:var(--sh-lg);animation:tin .3s;max-width:90vw}
.toast.bad{background:var(--bad)}
.toast.ok{background:var(--ok)}
@keyframes tin{from{transform:translateY(16px);opacity:0}}

/* ---------- Hộp thoại ---------- */
.modal{position:fixed;inset:0;background:rgba(15,17,30,.55);z-index:250;display:grid;place-items:center;padding:18px;
       animation:tin .2s;backdrop-filter:blur(2px)}
.modal .mbox{background:var(--card);border-radius:22px;padding:24px;width:100%;max-width:560px;max-height:88vh;overflow:auto;box-shadow:var(--sh-lg)}
.modal h3{margin:0 0 14px;font-size:19px;font-weight:800}

.empty{text-align:center;padding:40px 20px;color:var(--mut)}
.empty .ic{font-size:52px;margin-bottom:10px}

/* mascot */
.mascot{width:78px;height:78px;flex:0 0 auto}
.talkbox{display:flex;gap:14px;align-items:center;background:var(--pri-soft);border-radius:var(--r);padding:14px 16px}
.talkbox p{margin:0;font-size:14.7px;font-weight:600;line-height:1.5}

@media (max-width:520px){
  .topbar h1{font-size:21px}
  .card{padding:16px}
  .hero{padding:18px}
  .qcard{padding:16px}
  .qstem{font-size:16.5px}
}