:root{--red:#b91c1c;--red2:#fee2e2;--ink:#1f2937;--mut:#6b7280;--bg:#fafaf9;--card:#fff;--line:#e5e7eb;--ok:#15803d;--okb:#dcfce7;--bad:#b91c1c;--badb:#fee2e2;
--t1:#2563eb;--t2:#16a34a;--t3:#d97706;--t4:#dc2626;--t5:#6b7280;
--zh:"PingFang SC","Hiragino Sans GB","Heiti SC","Noto Sans CJK SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:70px;scroll-padding-bottom:90px}
body{margin:0;font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,var(--zh);color:var(--ink);background:var(--bg);padding-bottom:calc(68px + env(safe-area-inset-bottom))}
a{color:var(--red)}
.hidden{display:none!important}
.top{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;padding:calc(8px + env(safe-area-inset-top)) 16px 8px;background:#fff;border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:18px;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--red);color:#fff;font-family:var(--zh)}
.streak{font-size:14px;color:var(--mut)}
main{max-width:760px;margin:0 auto;padding:16px;outline:none}
h1{font-size:22px;margin:4px 0 12px}h2{font-size:18px;margin:20px 0 8px}
.muted{color:var(--mut)}.small{font-size:13px}.center{text-align:center}
.en{color:var(--mut);font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin:10px 0}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(min-width:600px){.grid{grid-template-columns:repeat(4,1fr)}}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.stat b{display:block;font-size:26px;color:var(--red)}
.btn{text-decoration:none;text-align:center;appearance:none;border:1px solid var(--line);background:#fff;color:var(--ink);padding:12px 16px;border-radius:12px;font:inherit;font-weight:600;cursor:pointer;touch-action:manipulation;min-height:44px}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.block{display:block;width:100%}
.btn:disabled{opacity:.5}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row>.btn{flex:1}
.chips{display:flex;gap:6px;overflow-x:auto;padding:4px 0 8px;-webkit-overflow-scrolling:touch}
.chip{flex:none;border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;font:inherit;font-size:14px;cursor:pointer;min-height:36px}
.chip.on{background:var(--red);border-color:var(--red);color:#fff}
input[type=search],select{width:100%;font:inherit;font-size:16px;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}
.list{list-style:none;margin:0;padding:0}
.w{display:flex;gap:12px;align-items:center;padding:10px 4px;border-bottom:1px solid var(--line);cursor:pointer}
.w .hz{font-family:var(--zh);font-size:28px;min-width:72px;text-align:center}
.w .info{flex:1;min-width:0}
.w .py{font-weight:600}
.w .dot{width:10px;height:10px;border-radius:50%;background:var(--line);flex:none}
.dot.b1,.dot.b2,.dot.b3{background:var(--t3)}.dot.b4,.dot.b5{background:var(--ok)}
.spk{border:0;background:var(--red2);color:var(--red);border-radius:50%;width:40px;height:40px;font-size:18px;flex:none;cursor:pointer}
.tone1{color:var(--t1)}.tone2{color:var(--t2)}.tone3{color:var(--t3)}.tone4{color:var(--t4)}.tone5{color:var(--t5)}
.flash{min-height:280px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;cursor:pointer;user-select:none;-webkit-user-select:none}
.flash .big{font-family:var(--zh);font-size:72px;line-height:1.2}
.flash .py{font-size:22px;font-weight:600;margin-top:8px}
.flash .mean{font-size:20px;margin-top:6px}
.q .prompt{font-size:20px;text-align:center;margin:8px 0 14px}
.q .prompt .big{font-family:var(--zh);font-size:56px;display:block}
.opts{display:grid;gap:10px}
.opt{text-align:left;font-size:17px}
.opt.zh{font-family:var(--zh);font-size:28px;text-align:center}
.opt.right{background:var(--okb);border-color:var(--ok)}
.opt.wrong{background:var(--badb);border-color:var(--bad)}
progress{width:100%;height:10px;border-radius:6px;overflow:hidden;-webkit-appearance:none;appearance:none;border:0;background:var(--line)}
progress::-webkit-progress-bar{background:var(--line)}
progress::-webkit-progress-value{background:var(--red)}
progress::-moz-progress-bar{background:var(--red)}
.tones{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}
.tone{text-align:center}
.tone svg{width:100%;max-width:120px;height:70px}
.tone .syl{font-size:28px;font-weight:700}
.tbtns{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.tbtns .btn{font-size:20px;padding:12px 4px}
.ph{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.ph .zhx{font-family:var(--zh);font-size:20px}
.ph .pyx{font-weight:600;color:var(--red)}
.warn{background:#fef3c7;color:#92400e;padding:10px 16px;font-size:14px}
.toast{pointer-events:none;position:fixed;left:50%;top:calc(60px + env(safe-area-inset-top));transform:translateX(-50%);background:#111827;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;max-width:90vw;z-index:20}
.tabs{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(6,1fr);background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);z-index:10}
.tabs a{display:flex;flex-direction:column;align-items:center;font-size:11px;color:var(--mut);text-decoration:none;padding:6px 0 8px}
.tabs a span{font-size:20px;line-height:1.3}
.tabs a.on{color:var(--red);font-weight:700}
.res{font-size:40px;font-weight:800;text-align:center;color:var(--red)}
.days{display:grid;grid-template-columns:repeat(14,1fr);gap:3px}
.days i{display:block;aspect-ratio:1;border-radius:3px;background:var(--line)}
.days i.a1{background:#fca5a5}.days i.a2{background:#ef4444}.days i.a3{background:#991b1b}
label.tog{display:flex;justify-content:space-between;align-items:center;padding:8px 0;gap:10px}
footer.src{margin-top:24px;font-size:12px;color:var(--mut)}
/* v2: jalur belajar pemula */
.tabs{grid-template-columns:repeat(7,1fr)}
.tabs a{font-size:10.5px;padding:6px 0 8px}
.tabs a span{font-size:19px}
a.streak{text-decoration:none}
.lead{margin:-4px 0 12px}
.btn.big{font-size:17px;padding:16px;margin:8px 0 4px}
.crumb{font-size:14px;margin-bottom:4px}.crumb a{text-decoration:none}
.step{display:flex;gap:12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;margin:12px 0}
.step .sn{flex:none;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font-weight:800}
.step.ok .sn{background:var(--ok)}
.step .sb{flex:1;min-width:0}
.step h2{margin:2px 0 4px;font-size:18px}
.step p{margin:4px 0 10px}
.step .btn{display:inline-block;margin:4px 0}
.lrows{display:grid;gap:8px;margin:10px 0}
.lrow{display:flex;align-items:center;gap:10px;width:100%;text-align:left;font:inherit;color:var(--ink);text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;cursor:pointer;min-height:56px}
.lrow.cur{border-color:var(--red);box-shadow:0 0 0 2px var(--red2)}
.lrow.locked{opacity:.55}
.lrow .ln{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--line);font-weight:700;font-size:14px}
.lrow .ln.done{background:var(--okb);color:var(--ok)}.lrow .ln.cur{background:var(--red);color:#fff}
.lrow .lt{flex:1;min-width:0;display:flex;flex-direction:column}
.lrow .lt b{font-size:15px}
.lrow .lt .small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:inherit}
.lrow .ls{flex:none;font-size:13px;color:var(--red);font-weight:600}
details.all summary{cursor:pointer;color:var(--red);font-weight:600;padding:8px 0}
.unit{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--mut);margin:12px 0 -2px}
.word{text-align:center;cursor:pointer;position:relative;padding:22px 14px}
.word .big{font-family:var(--zh);font-size:84px;line-height:1.15}
.word .py{font-size:26px;font-weight:700;margin-top:4px}
.word .mean{font-size:21px;margin-top:6px}
.spk.lg{width:56px;height:56px;font-size:24px;margin-top:12px}
.exm{cursor:pointer}.exm .zhx{font-family:var(--zh);font-size:22px}.exm .pyx{font-weight:600;color:var(--red)}
.nav2{margin-top:8px}
.q .mean{font-size:22px}
.q .py{font-size:20px;font-weight:600}
button.card.tone{font:inherit;color:inherit;width:100%;cursor:pointer;margin:0}
.pybox{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:20px;background:var(--bg);border-radius:12px;padding:10px 12px;margin:8px 0}
.big2{font-size:40px}
.zhx{font-family:var(--zh)}
.pyl{flex:none;min-width:72px;font-weight:800;color:var(--red);font-size:15px}
.big3{font-size:34px;font-weight:700;margin:8px 0}
.prompt{margin:10px 0 14px}
.tbtns .btn{font-size:18px}
.tbtns .btn .small{font-size:11px;font-weight:400}
.tag{font-size:11px;font-weight:600;color:var(--mut);border:1px solid var(--line);border-radius:6px;padding:0 4px;margin-left:4px}
/* v4: Kardiologi Intervensi */
.tabs{grid-template-columns:repeat(8,1fr)}
.tabs a{font-size:10px}
.tabs a span{font-size:18px}
.kw .big.long,.flash .big.long{font-size:clamp(28px,9vw,52px);line-height:1.25;word-break:break-all}
.q .prompt .big.kq{font-size:clamp(26px,8vw,48px)}
.opt.zh.kz{font-size:20px;text-align:center}
.kl{font-size:20px}
.lrows{grid-template-columns:minmax(0,1fr)}

/* v5: Belajar Mandarin — pemilih kursus di atas, sub-menu kursus di bawah */
.top{flex-direction:column;align-items:stretch;gap:6px;padding-bottom:6px}
.top .bar{display:flex;justify-content:space-between;align-items:center}
.course{display:flex;gap:6px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin:0 -16px;padding:0 16px 2px}
.course::-webkit-scrollbar{display:none}
.course a,.course .soon{flex:none;white-space:nowrap;font-size:14px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);text-decoration:none;color:var(--ink);background:#fff;min-height:34px;display:inline-flex;align-items:center}
.course a.on{background:var(--red);border-color:var(--red);color:#fff;font-weight:700}
.course .soon{color:var(--mut);background:var(--bg);border-style:dashed;cursor:not-allowed}
html{scroll-padding-top:110px}
.toast{top:calc(100px + env(safe-area-inset-top))}
.tabs{grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:1fr}
.tabs a{font-size:10.5px}
.tabs a span{font-size:19px}
@media (min-width:800px){.top{padding-left:calc(50% - 364px);padding-right:calc(50% - 364px)}.course{margin:0;padding:0 0 2px}}