@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900&display=swap');

:root{
  --bg:#FBF6EF; --surface:#FFFFFF; --surface2:#F5EFE3;
  --ink:#322E29; --muted:#8A8175; --faint:#B0A490; --line:#EFE7D8;
  --sidebar:#FFFFFF; --sidebar-ink:#322E29; --sidebar-dim:#B0A490; --sidebar-line:#EFE7D8;
  --d1:#46A46B; --d2:#3E93B8; --d3:#C68A2E; --d4:#D4695A;
  --d1s:#E4F2E8; --d2s:#E1EFF4; --d3s:#F6EBD8; --d4s:#F6E4E0;
  --green:#46A46B; --greenD:#2F7D4E;
  --streak:#E8A93B; --streak-bg:#FCEFD6; --streak-ink:#B87A16;
  --ok:#2F7D4E; --ok-bg:#E4F2E8; --bad:#B24438; --bad-bg:#F6E4E0; --warn:#B87A16;
  --mono:ui-monospace,'SF Mono','Cascadia Code',Menlo,Consolas,monospace;
  --sans:'Nunito',system-ui,sans-serif;
  --r:16px; --rs:12px; --rl:24px;
  --shadow:0 8px 22px -14px rgba(60,52,40,.35);
  --shadow-lg:0 20px 45px -18px rgba(60,52,40,.4);
}
:root[data-theme="dark"]{
  --bg:#1E1B18; --surface:#2A2622; --surface2:#332E28;
  --ink:#F2ECE1; --muted:#B0A493; --faint:#82786A; --line:#3A342C;
  --sidebar:#2A2622; --sidebar-ink:#F2ECE1; --sidebar-dim:#82786A; --sidebar-line:#3A342C;
  --d1:#5CC088; --d2:#5EB4DA; --d3:#E3AC55; --d4:#EC8676;
  --d1s:#20302A; --d2s:#1E2E36; --d3s:#33291A; --d4s:#352420;
  --green:#4FB47A; --greenD:#2C6F49;
  --streak:#F0B54E; --streak-bg:#3A2E18; --streak-ink:#F0B54E;
  --ok:#4FB47A; --ok-bg:#20302A; --bad:#EC8676; --bad-bg:#352420; --warn:#F0B54E;
  --shadow:0 10px 24px -14px rgba(0,0,0,.5);
  --shadow-lg:0 24px 50px -18px rgba(0,0,0,.6);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#1E1B18; --surface:#2A2622; --surface2:#332E28;
    --ink:#F2ECE1; --muted:#B0A493; --faint:#82786A; --line:#3A342C;
    --sidebar:#2A2622; --sidebar-ink:#F2ECE1; --sidebar-dim:#82786A; --sidebar-line:#3A342C;
    --d1:#5CC088; --d2:#5EB4DA; --d3:#E3AC55; --d4:#EC8676;
    --d1s:#20302A; --d2s:#1E2E36; --d3s:#33291A; --d4s:#352420;
    --green:#4FB47A; --greenD:#2C6F49;
    --streak:#F0B54E; --streak-bg:#3A2E18; --streak-ink:#F0B54E;
    --ok:#4FB47A; --ok-bg:#20302A; --bad:#EC8676; --bad-bg:#352420; --warn:#F0B54E;
    --shadow:0 10px 24px -14px rgba(0,0,0,.5);
    --shadow-lg:0 24px 50px -18px rgba(0,0,0,.6);
  }
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{animation:none!important;transition:none!important}}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
a{color:inherit}
:focus-visible{outline:2px solid var(--d2);outline-offset:2px;border-radius:4px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:20px;border:3px solid var(--bg)}

/* ---------- auth gate + account ---------- */
.needs-auth #app,.needs-auth #btmNav{display:none}
#authGate{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:24px;
  background:radial-gradient(120% 120% at 50% 0%, var(--surface2), var(--bg) 62%)}
.auth-card{width:100%;max-width:384px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:26px 24px}
.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.auth-brand .mark{width:42px;height:42px;border-radius:12px;background:var(--green);box-shadow:0 3px 0 var(--greenD);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:18px;flex:none}
.auth-brand h1{font-size:17px;font-weight:900;letter-spacing:-.01em}
.auth-brand .sub{font-size:12.5px;color:var(--muted);font-weight:700;margin-top:2px;line-height:1.35}
.auth-form{display:flex;flex-direction:column;gap:13px}
.auth-form label{display:flex;flex-direction:column;gap:6px;font-size:12px;font-weight:800;color:var(--muted)}
.auth-form input{font:inherit;font-size:15px;padding:11px 13px;border-radius:11px;border:1px solid var(--line);background:var(--surface2);color:var(--ink);width:100%}
.auth-form .pw-wrap{position:relative;display:block}
.auth-form .pw-wrap input{padding-right:56px}
.auth-form .pw-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--muted);font-weight:800;font-size:12px;cursor:pointer;padding:6px 8px;border-radius:8px}
.auth-form .pw-toggle:hover{color:var(--ink)}
.auth-form .pw-hint{font-size:11px;font-weight:700;color:var(--faint);text-transform:none;letter-spacing:0}
.auth-form .btn{width:100%;justify-content:center;margin-top:4px}
.auth-msg{font-size:12.5px;font-weight:700;line-height:1.4;border-radius:9px;padding:9px 11px;color:var(--bad);background:var(--bad-bg)}
.auth-msg.ok{color:var(--d1);background:var(--d1s)}
.auth-alt{margin-top:16px;text-align:center;font-size:12.5px;color:var(--muted)}
.linkbtn{color:var(--d2);font-weight:800;text-decoration:underline;font-size:inherit}
.side-acct{margin:6px 12px 0;padding:11px 12px 2px;border-top:1px solid var(--sidebar-line)}
.acct-email{font-size:12px;font-weight:800;color:var(--sidebar-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acct-row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:6px}
.acct-actions{display:flex;gap:12px}
.acct-sync{font-size:11px;color:var(--faint);font-weight:700}
.acct-sync.err{color:var(--bad)}
.linkbtn.danger{color:var(--bad)}

/* ---------- layout ---------- */
#app{display:grid;grid-template-columns:270px 1fr;min-height:100vh}
#sidebar{background:var(--sidebar);color:var(--sidebar-ink);padding:0 0 24px;position:sticky;top:0;height:100vh;overflow-y:auto;scrollbar-width:thin;border-right:1px solid var(--sidebar-line)}
#main{padding:28px 40px 90px;max-width:1080px;width:100%;min-width:0;margin:0 auto}
#menuBtn{display:none}
#btmNav{display:none}
@media (max-width:900px){
  #app{grid-template-columns:1fr}
  #sidebar{position:fixed;inset:0 22% 0 0;z-index:50;transform:translateX(-105%);transition:transform .25s;box-shadow:var(--shadow-lg)}
  #sidebar.open{transform:none}
  #main{padding:18px 16px 96px}
  #btmNav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:30;justify-content:space-around;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--line)}
  /* slide-in menu: account belongs at the top, not below the whole Learn tree */
  #sidebar{display:flex;flex-direction:column}
  #sidebar .side-head{order:0}
  #sidebar .side-acct{order:1;margin:0 12px 4px;padding:9px 12px 10px;border-top:none;border-bottom:1px solid var(--sidebar-line)}
  #sidebar .side-search{order:2}
  #sidebar .side-nav{order:3}
  #sidebar .theme-btn{order:4;margin-bottom:10px}
}
#scrim{display:none;position:fixed;inset:0;background:rgba(30,24,16,.45);z-index:45}
#scrim.on{display:block}

/* ---------- bottom nav (mobile) ---------- */
.bnav-btn{position:relative;display:flex;flex-direction:column;align-items:center;gap:3px;font-weight:800;font-size:10px;color:var(--faint);padding:4px 10px}
.bnav-btn.active{color:var(--green)}
.bnav-btn .ic{font-size:21px}
.bnav-btn .bdg{position:absolute;transform:translate(10px,-10px);background:var(--d4);color:#fff;font-size:9px;font-weight:900;padding:1px 5px;border-radius:20px}

/* ---------- sidebar ---------- */
.side-head{padding:18px 16px 14px;display:flex;align-items:center;gap:10px}
.side-head .mark{width:36px;height:36px;border-radius:11px;background:var(--green);box-shadow:0 3px 0 var(--greenD);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:16px;flex:none}
.side-head h1{font-size:14.5px;font-weight:900;color:var(--ink);letter-spacing:-.01em}
.side-head .sub{font-size:10.5px;color:var(--faint);margin-top:2px;font-weight:700;letter-spacing:.02em}
.side-search{padding:8px 14px 12px}
.side-search input{width:100%;background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:9px 12px;color:var(--ink);font-size:13px;font-family:inherit;font-weight:600}
.side-search input::placeholder{color:var(--faint);font-weight:600}
.side-nav{padding:2px 10px}
.snav{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:10px 11px;border-radius:12px;font-size:13.5px;font-weight:800;color:var(--muted)}
.snav:hover{background:var(--surface2)}
.snav.active{background:var(--d1s);color:var(--d1)}
.snav .ic{width:18px;text-align:center;font-size:15px}
.dgroup{margin-top:10px}
.dgroup>button{display:flex;align-items:center;gap:9px;width:100%;text-align:left;padding:9px 11px;border-radius:11px;color:var(--ink);font-weight:800;font-size:12.5px}
.dgroup>button:hover{background:var(--surface2)}
.dgroup .dot{width:9px;height:9px;border-radius:3px;flex:none}
.dgroup .car{margin-left:auto;font-size:10px;color:var(--faint);transition:transform .2s}
.dgroup.open .car{transform:rotate(90deg)}
.dgroup .comps{display:none;padding:2px 0 4px}
.dgroup.open .comps{display:block}
.citem{display:block;width:100%;text-align:left;padding:8px 11px 8px 28px;border-radius:11px;font-size:12.5px;color:var(--muted);font-weight:700;line-height:1.35}
.citem:hover{background:var(--surface2)}
.citem.active{background:var(--surface2);color:var(--ink)}
.citem .code{font-family:var(--mono);font-size:10px;color:var(--faint);margin-right:6px}
.citem .st{float:right;font-size:10px;margin-top:2px}
.st.done{color:var(--d1)}.st.part{color:var(--streak-ink)}
.theme-btn{margin:14px 10px 0;display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;font-family:inherit;font-weight:800;font-size:12.5px;background:var(--surface2);color:var(--ink)}

/* progress bar (competency weight + revision progress, same shape) */
.wbar{position:relative;height:5px;border-radius:3px;background:var(--surface2);overflow:hidden}
.wbar i{position:absolute;top:0;bottom:0;border-radius:3px}
.wbar .min{opacity:1}.wbar .max{opacity:.35}
.citem .wbar{margin:5px 0 1px}
.wlabel{font-family:var(--mono);font-size:10px;color:var(--faint)}

/* ---------- rings ---------- */
.ring{border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center}
.ring-inner{width:100%;height:100%;border-radius:50%;background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center}

/* ---------- shared main components ---------- */
.crumb{font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.05em;text-transform:uppercase;margin-bottom:10px}
.crumb b{color:var(--muted)}
h2.page{font-size:26px;font-weight:900;letter-spacing:-.02em;line-height:1.2;margin-bottom:6px}
.lede{color:var(--muted);font-size:14.5px;font-weight:600;max-width:720px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.chip{display:inline-block;font-family:var(--mono);font-size:11px;padding:3px 9px;border-radius:8px;letter-spacing:.03em;font-weight:700}
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 18px;border-radius:13px;font-weight:800;font-size:13.5px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);transition:background .15s,transform .1s}
.btn:hover{background:var(--surface2)}
.btn.pri{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 4px 0 var(--greenD)}
.btn.pri:hover{background:var(--green);filter:brightness(1.04)}
.btn.pri:active{transform:translateY(3px);box-shadow:0 1px 0 var(--greenD)}
.btn.ghost{border-color:transparent;background:transparent;color:var(--muted)}
.btn.ghost:hover{background:var(--surface2)}
.btn:disabled{opacity:.45;cursor:default;transform:none!important}
.tag{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--faint)}

/* ---------- dashboard ---------- */
.greet-row{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px;gap:12px}
.greet-sub{font-size:13px;font-weight:800;color:var(--faint)}
.greet-h1{font-size:26px;font-weight:900;letter-spacing:-.02em;margin-top:1px}
.home-row{display:grid;grid-template-columns:1fr;gap:12px;margin-bottom:12px}
@media(min-width:820px){.home-row{grid-template-columns:1.3fr 1fr}}
.hero{background:linear-gradient(135deg,var(--green),var(--greenD));border-radius:var(--rl);padding:22px 24px;color:#fff;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;justify-content:space-between;min-height:180px}
.hero .lab{font-size:11px;font-weight:900;letter-spacing:.1em;opacity:.85}
.hero .ttl{font-size:20px;font-weight:900;line-height:1.25;margin:6px 0 14px;max-width:360px}
.hero .prog-row{display:flex;justify-content:space-between;font-size:12px;font-weight:800;opacity:.9;margin-bottom:5px}
.hero .prog-track{height:8px;border-radius:5px;background:rgba(255,255,255,.28);margin-bottom:16px}
.hero .prog-fill{height:100%;border-radius:5px;background:#fff}
.hero .btn.pri{background:#fff;color:var(--greenD);box-shadow:0 4px 0 rgba(0,0,0,.14)}
.hero .btn.pri:active{box-shadow:0 1px 0 rgba(0,0,0,.14)}
.side-stack{display:grid;grid-template-rows:1fr 1fr;gap:12px}
.stat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:15px 17px;display:flex;align-items:center;gap:14px;text-align:left;width:100%}
.stat-card .num{font-size:28px;font-weight:900;line-height:1;flex:none;font-variant-numeric:tabular-nums}
.stat-card .ttl{font-size:14px;font-weight:900;line-height:1.2}
.stat-card .sub{font-size:12px;color:var(--muted);font-weight:700;margin-top:2px}
.stat-card .sub.act{color:var(--green)}
.section-lbl{font-size:12.5px;font-weight:900;letter-spacing:.04em;color:var(--muted);padding:14px 2px 10px}
.dom-list{display:grid;gap:10px}
.dom-row{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:13px 15px;width:100%;text-align:left}
.dom-row .code{font-size:10px;font-weight:900;letter-spacing:.08em}
.dom-row .ttl{font-size:14.5px;font-weight:800;line-height:1.2;color:var(--ink)}
.dom-row .arrow{color:var(--faint);font-size:21px;margin-left:auto;flex:none}
.panel{padding:18px 20px;margin-top:16px}
.panel h3{font-size:15px;font-weight:900;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.weak-item{display:flex;align-items:center;gap:10px;padding:9px 4px;border-top:1px solid var(--line);font-size:13.5px;font-weight:700}
.weak-item:first-of-type{border-top:none}
.weak-item .sig{font-family:var(--mono);font-size:11.5px;color:var(--muted);margin-left:auto;flex:none;font-variant-numeric:tabular-nums}
.weak-item a{text-decoration:none;font-weight:800}
.weak-item a:hover{text-decoration:underline}
.hist-row{display:flex;gap:12px;align-items:baseline;padding:8px 4px;border-top:1px solid var(--line);font-size:13px;font-variant-numeric:tabular-nums}
.hist-row:first-of-type{border-top:none}
.hist-row .sc{font-weight:900;font-size:15px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:860px){.two-col{grid-template-columns:1fr}}
.due-big{font-size:34px;font-weight:900;font-variant-numeric:tabular-nums}

/* ---------- competency page ---------- */
.comp-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:4px}
.range-pill{font-family:var(--mono);font-size:12px;background:var(--acc-s);color:var(--acc);padding:5px 11px;border-radius:99px;font-weight:800}
.tabs{display:flex;gap:6px;margin:22px 0 20px;background:var(--surface2);padding:5px;border-radius:15px;border-bottom:none}
.tabs button{flex:1;padding:10px;border-radius:11px;font-weight:800;font-size:13.5px;color:var(--muted);border-bottom:none}
.tabs button.on{color:var(--ink);background:var(--surface);box-shadow:var(--shadow)}
.glance{padding:18px 20px;background:var(--acc-s);border-radius:var(--r);font-size:14.5px;line-height:1.6;margin-bottom:22px;font-weight:600}
.glance .tag{color:var(--acc);display:block;margin-bottom:6px}
.sect{margin:28px 0 12px;display:flex;align-items:baseline;gap:10px}
.sect h3{font-size:17px;font-weight:900;letter-spacing:-.01em}
.sect .n{font-family:var(--mono);font-size:11px;color:var(--faint)}

/* compact concept list (Revise tab) -> links to concept detail page */
.concept-list{display:grid;gap:10px;margin-bottom:8px}
.concept-row{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;width:100%;text-align:left;box-shadow:var(--shadow)}
.concept-row .ttl{font-size:15px;font-weight:900;line-height:1.25;color:var(--ink)}
.concept-row .hook{font-size:12.5px;color:var(--muted);font-weight:600;margin-top:2px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.concept-row .arrow{color:var(--faint);font-size:21px;margin-left:auto;flex:none}
.concept-row .cbadge{width:28px;height:28px;border-radius:50%;background:var(--acc-s);color:var(--acc);flex:none;display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:900}

/* concept detail page */
.concept-detail{max-width:720px}
.concept-detail h2.page{margin-bottom:14px}
.cfield{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:14px 0;font-size:14.5px;border-top:1px dashed var(--line)}
.cfield:first-of-type{border-top:none}
.cfield b{font-size:10.5px;font-weight:900;letter-spacing:.07em;text-transform:uppercase;color:var(--faint);padding-top:2px}
.cfield.trap{background:var(--d4s);margin:6px -10px -6px;padding:14px 10px;border-radius:14px;border-top:none}
.cfield.trap b{color:var(--d4)}
.cfield div{color:var(--ink);line-height:1.65}
@media (max-width:600px){.cfield{grid-template-columns:1fr;gap:4px}}
.concept-pager{display:flex;justify-content:space-between;gap:10px;margin-top:26px}
.concept-pager .btn{flex:1;max-width:260px}
table.cmp{width:100%;border-collapse:collapse;font-size:13px;background:var(--surface)}
.cmp th{background:var(--surface2);text-align:left;padding:10px 13px;font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);border-bottom:2px solid var(--line);white-space:nowrap;font-weight:800}
.cmp td{padding:10px 13px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
.cmp td:first-child{font-weight:800;white-space:nowrap}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);margin-bottom:16px}
.pair{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:11px 4px;border-top:1px solid var(--line);font-size:13.5px}
.pair:first-of-type{border-top:none}
.pair .vs{font-weight:800;white-space:nowrap}
.pair .vs em{font-style:normal;color:var(--acc)}
@media (max-width:640px){.pair{grid-template-columns:1fr;gap:3px}}
.refs a{display:block;padding:10px 4px;border-top:1px solid var(--line);font-size:13.5px;text-decoration:none}
.refs a:first-of-type{border-top:none}
.refs a:hover .t{text-decoration:underline}
.refs .t{font-weight:800}
.refs .s{color:var(--faint);font-size:12px;margin-left:8px}
.pi-list{font-size:13px;color:var(--muted);line-height:1.7;padding-left:18px;font-weight:600}
.concept-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.concept-nav-link{font-size:12px;font-weight:800;padding:6px 12px;border-radius:99px;background:var(--acc-s);color:var(--acc)}
.concept-nav-link:hover{filter:brightness(0.96)}
.mini-flash-toggle{font-size:12.5px;padding:8px 14px}

/* ---------- flashcards ---------- */
.flash-stage{max-width:600px;margin:10px auto}
.fcard{perspective:1600px;cursor:pointer;height:290px}
.fcard-inner{position:relative;width:100%;height:100%;transition:transform .5s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}
.fcard.flip .fcard-inner{transform:rotateY(180deg)}
.fface{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px;border-radius:var(--rl);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-lg)}
.fface.back{transform:rotateY(180deg);background:var(--green);border-color:var(--green);color:#fff}
.fface .tag{position:absolute;top:16px;left:20px}
.fface.back .tag{color:rgba(255,255,255,.8)}
.fface p{font-size:18px;font-weight:800;line-height:1.4;max-width:480px}
.fface.back p{font-size:15.5px;font-weight:700}
.fctrl{display:flex;justify-content:center;gap:10px;margin-top:18px;flex-wrap:wrap}
.fmeta{text-align:center;font-family:var(--mono);font-size:12px;color:var(--faint);margin-top:12px}
.btn.know{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 4px 0 var(--greenD)}
.btn.know:active{transform:translateY(3px);box-shadow:0 1px 0 var(--greenD)}
.btn.dunno{background:var(--bad-bg);color:var(--bad);border-color:transparent}
.btn.dunno:hover{filter:brightness(0.97)}

/* ---------- quiz / exam ---------- */
.q-wrap{max-width:760px}
.q-stem{font-size:16px;line-height:1.6;font-weight:800;margin:14px 0 18px;white-space:pre-line}
.q-note{font-family:var(--mono);font-size:11px;font-weight:800;color:var(--warn);margin-bottom:10px}
.opt{display:flex;gap:13px;align-items:flex-start;width:100%;text-align:left;padding:14px 16px;border:2px solid var(--line);border-radius:var(--r);background:var(--surface);margin-bottom:10px;font-size:14.5px;font-weight:700;line-height:1.5;transition:border-color .12s,background .12s}
.opt:hover{border-color:var(--faint)}
.opt .key{font-family:inherit;font-size:12.5px;font-weight:900;color:var(--muted);border:2px solid var(--line);border-radius:9px;min-width:26px;height:26px;display:flex;align-items:center;justify-content:center;flex:none;margin-top:1px;background:var(--surface2)}
.opt.sel{border-color:var(--d2);background:var(--d2s)}
.opt.sel .key{border-color:var(--d2);color:var(--d2);background:var(--surface)}
.opt.right{border-color:var(--green);background:var(--d1s)}
.opt.right .key{border-color:var(--green);color:#fff;background:var(--green)}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt.wrong .key{border-color:var(--bad);color:#fff;background:var(--bad)}
.expl{padding:16px 18px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);font-size:13.5px;line-height:1.6;margin:14px 0;box-shadow:var(--shadow);font-weight:600}
.expl b.v{display:block;font-size:12px;letter-spacing:.05em;text-transform:uppercase;margin-bottom:7px;font-weight:900}
.expl b.v.ok{color:var(--green)}.expl b.v.no{color:var(--bad)}
.q-foot{display:flex;align-items:center;gap:10px;margin-top:16px;flex-wrap:wrap}
.q-prog{font-family:var(--mono);font-size:12px;color:var(--faint);margin-left:auto;font-variant-numeric:tabular-nums}
.score-hero{text-align:center;padding:36px 20px}
.score-hero .big{font-size:54px;font-weight:900;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.score-hero .sub{color:var(--muted);margin-top:4px;font-weight:700}
.dom-break{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:18px 0}
.dom-break .db{padding:13px 15px;border-radius:var(--rs);border:1px solid var(--line);background:var(--surface)}
.db .l{font-family:var(--mono);font-size:10.5px;color:var(--faint)}
.db .v{font-size:20px;font-weight:900;font-variant-numeric:tabular-nums}
/* exam chrome */
.exam-bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:11px 16px;box-shadow:var(--shadow);margin-bottom:18px}
.exam-bar .timer{font-family:var(--mono);font-size:17px;font-weight:800;font-variant-numeric:tabular-nums}
.exam-bar .timer.low{color:var(--bad)}
.navgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(36px,1fr));gap:6px;margin:14px 0}
.navgrid button{height:34px;border:2px solid var(--line);border-radius:9px;font-family:var(--mono);font-size:11.5px;background:var(--surface);font-variant-numeric:tabular-nums;font-weight:700}
.navgrid button.answered{background:var(--d2s);border-color:var(--d2);color:var(--d2);font-weight:800}
.navgrid button.flagged{box-shadow:inset 0 -3px 0 var(--warn)}
.navgrid button.cur{outline:2px solid var(--ink)}
.rev-q{padding:16px 18px;margin-bottom:12px}
.rev-q .rs{font-weight:800;font-size:14px;margin-bottom:10px;white-space:pre-line}
.rev-line{font-size:13px;padding:3px 0;font-weight:600}
.rev-line b{font-family:var(--mono);font-size:11px;margin-right:6px}

/* ---------- mind map ---------- */
.mm{margin-top:18px}
.mm-node{margin:6px 0}
.mm-toggle{display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);font-weight:800;font-size:13.5px;box-shadow:var(--shadow)}
.mm-toggle .car{font-size:10px;color:var(--faint);transition:transform .2s}
.mm-node.open>.mm-toggle .car{transform:rotate(90deg)}
.mm-kids{display:none;margin:6px 0 6px 17px;padding-left:20px;border-left:2px solid var(--line)}
.mm-node.open>.mm-kids{display:block}
.mm-leaf{display:block;padding:6px 0 6px 2px;font-size:13px;font-weight:700;color:var(--ink);text-decoration:none}
.mm-leaf:hover{color:var(--acc);text-decoration:underline}
.mm-root>.mm-toggle{background:var(--acc);border-color:var(--acc);color:#fff;font-size:15px;padding:11px 22px}
.mm-root>.mm-toggle .car{color:rgba(255,255,255,.7)}

/* ---------- search results ---------- */
.sr{display:block;padding:14px 17px;margin-bottom:10px;text-decoration:none}
.sr:hover{border-color:var(--faint)}
.sr .where{font-family:var(--mono);font-size:10.5px;color:var(--faint);letter-spacing:.04em;font-weight:700}
.sr .name{font-weight:800;font-size:14px;margin:3px 0}
.sr .snip{font-size:13px;color:var(--muted);font-weight:600}
mark{background:var(--streak-bg);color:var(--streak-ink);border-radius:3px;padding:0 2px}

/* ---------- misc ---------- */
.banner{padding:11px 16px;border-radius:var(--rs);background:var(--streak-bg);border:1px solid var(--streak);color:var(--streak-ink);font-size:13px;font-weight:700;margin-bottom:16px}
.empty{color:var(--faint);font-size:13.5px;padding:14px 4px;font-weight:600}
.toast{position:fixed;bottom:22px;right:22px;background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:13px;font-size:13.5px;font-weight:700;box-shadow:var(--shadow-lg);z-index:100;animation:tin .25s}
@keyframes tin{from{opacity:0;transform:translateY(8px)}to{opacity:1}}
.footer-note{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--faint);line-height:1.6;font-weight:600}
.exam-setup .opt-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.exam-setup .mode{flex:1;min-width:150px;padding:18px;border:2px solid var(--line);border-radius:var(--r);text-align:left;background:var(--surface)}
.exam-setup .mode:hover{border-color:var(--faint)}
.exam-setup .mode.sel{border-color:var(--green);box-shadow:0 0 0 1px var(--green)}
.exam-setup .mode b{display:block;font-size:16px;font-weight:900}
.exam-setup .mode span{font-size:12px;color:var(--muted);font-weight:600}
.btn.lg{padding:13px 26px;font-size:15px;border-radius:15px}
.mini{font-size:11.5px;font-weight:800;padding:5px 11px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink)}
.mini:hover{background:var(--surface2)}
.mini.ghost{border-color:transparent;background:transparent;color:var(--muted)}

/* ============================================================
   REBUILD — sidebar tree, home, learn, practice, session, map
   ============================================================ */

/* ---- sidebar: section nav + learn tree ---- */
.snav-group{display:grid;gap:2px}
.side-sub{font-size:10px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding:16px 13px 6px}
.snav.small{font-size:12px;padding:8px 11px;font-weight:700}
.snav.small .ic{font-size:13px}
.tree{padding:0 2px}
.tnode>.tkids{display:none}
.tnode.open>.tkids{display:block}
.tdom{display:flex;align-items:center;gap:9px;width:100%;text-align:left;padding:8px 10px;border-radius:10px;font-weight:800;font-size:12.5px;color:var(--ink)}
.tdom:hover{background:var(--surface2)}
.tdot{width:9px;height:9px;border-radius:3px;flex:none}
.tdom .tlbl{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tdom .tpct{font-family:var(--mono);font-size:10px;color:var(--faint)}
.tcar{font-size:9px;color:var(--faint);transition:transform .2s}
.tnode.open>.tdom .tcar,.tnode.open>.tcomp .tcar{transform:rotate(90deg)}
.tkids{margin-left:5px;padding-left:9px;border-left:1.5px solid var(--line)}
.tcomp{display:flex;align-items:center;gap:6px;width:100%;text-align:left;padding:6px 9px;border-radius:9px;font-size:11.5px;font-weight:800;color:var(--muted)}
.tcomp:hover{background:var(--surface2)}
.tcomp .ccode{font-family:var(--mono);flex:1}
.ttopic{display:flex;align-items:flex-start;gap:7px;width:100%;text-align:left;padding:6px 9px;border-radius:9px;font-size:12px;font-weight:700;color:var(--muted);line-height:1.35}
.ttopic:hover{background:var(--surface2)}
.ttopic.active{background:var(--d1s);color:var(--d1)}

/* ---- home doors ---- */
.doors{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:640px){.doors{grid-template-columns:1fr 1fr}}
.door{position:relative;text-align:left;padding:22px 22px 18px;border-radius:var(--rl);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);overflow:hidden;transition:transform .12s,box-shadow .2s}
.door:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.door.learn{background:linear-gradient(150deg,var(--d1s),var(--surface) 70%)}
.door.practice{background:linear-gradient(150deg,var(--d2s),var(--surface) 70%)}
.door-ic{font-size:30px;line-height:1}
.door-t{font-size:22px;font-weight:900;letter-spacing:-.02em;margin:10px 0 4px}
.door-s{font-size:13px;color:var(--muted);font-weight:700;line-height:1.45;max-width:320px}
.door-bar{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:12px;font-weight:800;color:var(--muted)}
.door-bar .wbar{flex:1}
.door.learn .door-t{color:var(--d1)}.door.practice .door-t{color:var(--d2)}
.continue:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
/* fill the grid row so it lines up with the stacked stat cards */
.two-col .continue{height:100%;margin-top:0;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}

/* ---- learn home ---- */
.learn-overall{display:flex;align-items:center;gap:16px;margin:16px 0}
.dom-cards{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:760px){.dom-cards{grid-template-columns:1fr 1fr}}
.dom-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:16px 18px}
.dc-head{display:flex;align-items:center;gap:12px}
.cbadge{width:34px;height:34px;border-radius:11px;flex:none;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}
.dc-title{font-size:16px;font-weight:900;letter-spacing:-.01em}
.dc-bp{font-size:11.5px;color:var(--faint);font-weight:700;font-family:var(--mono)}
.dc-pct{margin-left:auto;font-family:var(--mono);font-size:13px;font-weight:800;color:var(--muted)}
.dc-desc{font-size:13px;color:var(--muted);font-weight:600;line-height:1.5;margin:11px 0 12px}
.dc-comps{display:grid;gap:6px}
.dc-comp{display:flex;align-items:center;gap:9px;text-align:left;padding:9px 11px;border-radius:11px;background:var(--surface2);font-weight:700}
.dc-comp:hover{background:var(--acc-s)}
.dc-comp .ccode{font-family:var(--mono);font-size:11px;font-weight:800;color:var(--acc);flex:none;width:34px}
.dc-comp .cttl{font-size:12.5px;line-height:1.3;flex:1}
.dc-comp .cmeta{font-family:var(--mono);font-size:11px;color:var(--faint);flex:none}

/* ---- topic (lesson) page ---- */
.topicwrap{max-width:760px}
.topic-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:10px 0 20px}
.tmeta{font-size:12px;font-weight:800;color:var(--faint);font-family:var(--mono)}
.btn.mark{margin-left:auto;padding:8px 16px;font-size:12.5px}
.btn.mark.done{background:var(--d1s);color:var(--d1);border-color:var(--d1)}
.why-banner{padding:16px 18px;border-radius:var(--r);background:var(--acc-s);font-size:14.5px;line-height:1.6;font-weight:600;margin-bottom:22px;border-left:4px solid var(--acc)}
.why-banner .tag{display:block;color:var(--acc);margin-bottom:5px}
.topic-body{font-size:15px;line-height:1.7}
.topic-body h3{font-size:17px;font-weight:900;letter-spacing:-.01em;margin:26px 0 10px}
.topic-body p{margin:0 0 14px}
.topic-body ul,.topic-body ol{margin:0 0 14px 20px}
.topic-body li{margin-bottom:7px}
.topic-body strong{font-weight:800}
.topic-body em{font-style:italic}
.topic-body table{display:block;overflow-x:auto;width:100%;border-collapse:collapse;font-size:13px;margin:6px 0 18px;border:1px solid var(--line);border-radius:var(--r)}
.topic-body th{background:var(--surface2);text-align:left;padding:9px 12px;font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);border-bottom:2px solid var(--line);font-weight:800;white-space:nowrap}
.topic-body td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
.topic-body tr td:first-child{font-weight:700}
.callout{padding:15px 18px;border-radius:var(--r);margin:16px 0;font-size:14px;line-height:1.6}
.callout .tag{display:block;margin-bottom:8px}
.callout ul{margin:0;padding-left:18px}
.callout li{margin-bottom:8px;font-weight:600}
.callout.tested{background:var(--d2s);border:1px solid var(--d2)}
.callout.tested .tag{color:var(--d2)}
.callout.traps{background:var(--d4s);border:1px solid var(--d4)}
.callout.traps .tag{color:var(--d4)}
.callout.traps li b{color:var(--bad);font-weight:800}
.callout.traps.flat{border:none;background:var(--d4s)}
.callout.remember{background:var(--d3s);border:1px solid var(--d3)}
.callout.remember .tag{color:var(--d3)}
.practice-embed{margin:28px 0 8px;padding:20px;border:2px dashed var(--acc);border-radius:var(--rl);background:var(--acc-s)}
.pe-head h3{font-size:17px;font-weight:900;margin-top:3px}
.pe-sub{font-size:13px;color:var(--muted);font-weight:700;margin-bottom:14px}
.practice-embed .q-wrap{background:var(--surface);border-radius:var(--r);padding:16px;border:1px solid var(--line)}
.pe-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.pe-done{padding:16px;background:var(--surface);border-radius:var(--r);font-weight:800;text-align:center}
.topic-pager{display:flex;justify-content:space-between;gap:10px;margin-top:30px}
.topic-pager .btn{flex:1;max-width:300px;justify-content:center}

/* ---- reference ---- */
.rchips{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0 18px}
.rchip{font-family:var(--mono);font-size:12px;font-weight:800;padding:6px 12px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);color:var(--muted)}
.rchip.on,.rchip:hover{background:var(--acc-s);color:var(--acc);border-color:var(--acc)}
.ref-comp{margin-bottom:34px}
.ref-comp-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.ref-comp-head h3{font-size:18px;font-weight:900;letter-spacing:-.01em}
.ref-block{margin-bottom:16px}
.ref-lbl{font-size:10.5px;font-weight:900;letter-spacing:.07em;text-transform:uppercase;color:var(--acc);margin-bottom:7px}
.ref-block h4{font-size:14px;font-weight:800;margin-bottom:7px}

/* ---- glossary ---- */
.gloss-search{margin:12px 0 16px}
.gloss-search input{width:100%;max-width:420px;background:var(--surface);border:1.5px solid var(--line);border-radius:12px;padding:11px 14px;color:var(--ink);font-size:14px;font-family:inherit;font-weight:600}
.gloss-list{display:grid;gap:0}
.gloss-item{padding:13px 2px;border-top:1px solid var(--line)}
.gloss-item:first-child{border-top:none}
.gloss-item dt{font-size:14.5px;font-weight:900;margin-bottom:3px}
.gloss-item dd{font-size:13.5px;color:var(--muted);font-weight:600;line-height:1.55}

/* ---- practice dashboard ---- */
.pd-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}
@media(min-width:720px){.pd-actions{grid-template-columns:repeat(4,1fr)}}
.pd-act{display:flex;align-items:center;gap:11px;text-align:left;padding:15px 15px;border-radius:var(--r);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);transition:background .15s,border-color .15s,transform .1s}
.pd-act:hover{background:var(--surface2);border-color:var(--faint)}
.pd-act:active{transform:translateY(1px)}
.dot-due{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--warn);margin-left:6px;vertical-align:2px}
.pd-act.pri{background:var(--green);border-color:var(--green);box-shadow:0 4px 0 var(--greenD);color:#fff}
.pd-act.pri span,.pd-act.pri b{color:#fff}
.pa-ic{font-size:22px;flex:none}
.pd-act b{display:block;font-size:14px;font-weight:900}
.pd-act span{font-size:11.5px;color:var(--muted);font-weight:700}
/* "weakest on your last exam" strip */
.exam-strip{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:13px 16px;margin-bottom:4px}
.es-lbl{font-size:12.5px;font-weight:900;color:var(--muted)}
.exam-strip .btn{margin-left:auto}
/* section progress table */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap}
.sec-total{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--faint);letter-spacing:0}
.sec-panel{padding:2px 16px 12px}
.sec-domrow{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:12px 6px;border-top:1px solid var(--line);border-radius:10px;transition:background .15s}
.sec-domrow:first-child{border-top:none}
.sec-domrow:hover{background:var(--surface2)}
.sec-domrow .sr-ttl{font-weight:900}
.sec-domrow .tcar{flex:none;font-size:11px;color:var(--faint);transition:transform .2s}
.sec-domrow.open .tcar{transform:rotate(90deg)}
.sec-kids{padding-left:14px}
.sec-kids .sec-row{padding-right:24px}
.sec-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line)}
.sec-row .chip{flex:none}
.sr-main{flex:1;min-width:0}
.sr-ttl{font-size:13.5px;font-weight:800;line-height:1.3;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none}
a.sr-ttl:hover{text-decoration:underline;cursor:pointer}
.sr-cell{display:flex;flex-direction:column;align-items:flex-start;gap:2px;flex:none;width:100px;padding:8px 10px;border-radius:10px;text-align:left}
button.sr-cell{transition:background .15s,border-color .15s;border:1px solid transparent}
button.sr-cell:hover:not(:disabled){background:var(--surface2);border-color:var(--line)}
button.sr-cell:disabled{cursor:default;opacity:.75}
.sr-lbl{font-size:10px;font-weight:900;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.sr-val{font-family:var(--mono);font-size:13px;font-weight:800;font-variant-numeric:tabular-nums}
.sr-bar{display:block;width:100%}
.sr-sub{font-size:10.5px;font-weight:700;color:var(--muted);min-height:15px}
.sr-acc{width:78px}
.sec-row.locked{opacity:.65}
.sec-row.locked .sr-ttl{color:var(--muted)}
@media(max-width:720px){
  .sec-row,.sec-domrow{flex-wrap:wrap}
  .sr-main{flex-basis:calc(100% - 58px)}
  .sec-domrow .sr-main{flex-basis:calc(100% - 78px)}
  .sr-cell{flex:1;min-width:86px;width:auto;min-height:64px;padding:9px 10px;background:var(--surface2);border-color:var(--line)}
  .sec-domrow .sr-cell{background:transparent;min-height:0;padding:4px 6px}
  .sr-ttl{white-space:normal}
  .sec-kids{padding-left:6px}
}

/* ---- session builder ---- */
.build-sec{margin:18px 0}
.bs-lbl{font-size:13px;font-weight:900;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.pick-doms{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:680px){.pick-doms{grid-template-columns:1fr 1fr}}
.pick-dom{padding:12px 14px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.pd-all{display:flex;align-items:center;gap:8px;font-weight:800;font-size:13px;margin-bottom:9px}
.pd-all:hover{color:var(--acc)}
.pick-comps{display:flex;flex-wrap:wrap;gap:6px}
.pchip{font-family:var(--mono);font-size:11.5px;font-weight:800;padding:6px 10px;border-radius:9px;border:1.5px solid var(--line);background:var(--surface2);color:var(--muted)}
.pchip.on{background:var(--acc);border-color:var(--acc);color:#fff}
.seg{display:inline-flex;flex-wrap:wrap;gap:4px;background:var(--surface2);padding:4px;border-radius:13px}
.seg button{padding:9px 15px;border-radius:10px;font-weight:800;font-size:12.5px;color:var(--muted)}
.seg button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.build-foot{position:sticky;bottom:0;display:flex;align-items:center;gap:14px;justify-content:space-between;margin-top:24px;padding:14px 0;background:linear-gradient(transparent,var(--bg) 30%)}
.bf-count{font-weight:800;font-size:13.5px;color:var(--muted)}
.fc-count{font-family:var(--mono);font-size:12px;color:var(--muted);margin:2px 0 12px}

/* ---- session runner ---- */
.sess-bar{display:flex;align-items:center;gap:12px;padding:2px 0 12px}
.sb-x{width:34px;height:34px;border-radius:10px;border:1.5px solid var(--line);background:var(--surface);font-size:14px;font-weight:900;color:var(--muted);flex:none}
.sb-x:hover{background:var(--surface2)}
.sb-title{font-weight:900;font-size:15px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sb-timer{font-family:var(--mono);font-size:16px;font-weight:800;font-variant-numeric:tabular-nums;background:var(--surface2);padding:5px 11px;border-radius:10px}
.sb-timer.low{color:#fff;background:var(--bad)}
.sb-prog{font-family:var(--mono);font-size:13px;font-weight:800;color:var(--faint)}
.sb-track{height:5px;border-radius:3px;background:var(--surface2);overflow:hidden;margin-bottom:20px}
.sb-track i{display:block;height:100%;background:var(--green);border-radius:3px;transition:width .3s}
.q-topline{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.q-note-code{font-family:var(--mono);font-size:11px;font-weight:800;color:var(--faint)}
.bm-btn{margin-left:auto;font-size:12px;font-weight:800;padding:5px 11px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);color:var(--muted)}
.bm-btn.on{background:var(--streak-bg);color:var(--streak-ink);border-color:var(--streak)}
.q-wrap.compact .q-stem{font-size:15px}
.rev-opt{display:flex;gap:9px;align-items:flex-start;padding:8px 12px;border-radius:10px;font-size:13px;font-weight:600;margin-bottom:6px;border:1.5px solid var(--line)}
.rev-opt b{font-family:var(--mono);flex:none}
.rev-opt.right{background:var(--d1s);border-color:var(--green);color:var(--ink)}
.rev-opt.wrong{background:var(--bad-bg);border-color:var(--bad)}

/* ---------- sidebar account link ---------- */
.acct-link{display:block;width:100%;text-align:left;border-radius:11px;padding:8px 10px}
.acct-link:hover{background:var(--surface2)}
.acct-link .acct-email{font-size:12px;font-weight:800;color:var(--sidebar-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.acct-row2{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:3px}
.acct-manage-cue{font-size:11px;font-weight:800;color:var(--faint)}

/* ---------- My Account page ---------- */
.acct-page{display:flex;flex-direction:column;gap:14px;max-width:560px}
.acct-sec{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:16px 18px}
.acct-sec .as-lbl{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);margin-bottom:8px}
.as-email{font-size:15px;font-weight:800;color:var(--ink)}
.as-sync{font-size:12px;font-weight:700;color:var(--faint);margin-top:3px}
.as-plan{border-radius:12px;padding:14px;background:var(--surface2)}
.as-plan.paid{background:var(--d1s)}
.as-plan .plan-name{font-size:15px;font-weight:900;color:var(--ink)}
.as-plan .plan-desc{font-size:13px;font-weight:600;color:var(--muted);margin-top:5px;line-height:1.45}
.as-plan .btn{margin-top:12px}
.acct-form{display:flex;flex-direction:column;gap:6px}
.acct-form label{display:flex;flex-direction:column;gap:6px;font-size:12px;font-weight:800;color:var(--muted)}
.acct-form input{font:inherit;font-size:15px;padding:11px 13px;border-radius:11px;border:1px solid var(--line);background:var(--surface2);color:var(--ink);width:100%}
.acct-form .pw-wrap{position:relative;display:block}
.acct-form .pw-wrap input{padding-right:56px}
.acct-form .pw-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--muted);font-weight:800;font-size:12px;cursor:pointer;padding:6px 8px;border-radius:8px}
.acct-form .pw-toggle:hover{color:var(--ink)}
.acct-form .pw-hint{font-size:11px;font-weight:700;color:var(--faint)}
.acct-form .btn{margin-top:8px;align-self:flex-start}
.acct-msg{font-size:12.5px;font-weight:700;line-height:1.4;border-radius:9px;padding:9px 11px}
.acct-msg.err{color:var(--bad);background:var(--bad-bg)}
.acct-msg.ok{color:var(--d1);background:var(--d1s)}
.acct-manage{display:flex;gap:10px;flex-wrap:wrap}
.btn.danger{color:var(--bad);border-color:var(--bad)}
.as-fine{font-size:11.5px;color:var(--faint);font-weight:600;margin-top:9px;line-height:1.45}

/* ---------- lock affordances ---------- */
.dc-flag{display:inline-block;margin-left:8px;font-size:10px;font-weight:900;letter-spacing:.04em;text-transform:uppercase;padding:2px 7px;border-radius:20px;vertical-align:middle}
.dc-flag.free{background:var(--d1s);color:var(--d1)}
.dc-flag.lock{background:var(--surface2);color:var(--faint)}
.dom-card.is-locked{opacity:.92}
.dc-comp.locked{cursor:pointer;opacity:.7}
.dc-comp.locked .cmeta{color:var(--faint)}
.ttopic.locked{opacity:.6;cursor:pointer}
.tlock{margin-left:auto;font-size:11px}
.locked-panel{padding:28px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}
.locked-panel .lp-ic{font-size:34px}
.locked-panel h3{font-size:17px;font-weight:900;color:var(--ink)}
.locked-panel p{font-size:13.5px;font-weight:600;color:var(--muted);max-width:420px;line-height:1.5}
.lp-actions{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.paywall-note{font-size:12px;font-weight:700;color:var(--muted);background:var(--surface2);border-radius:10px;padding:8px 12px;margin-top:6px}

/* ---------- paywall modal ---------- */
.paywall-ov{position:fixed;inset:0;z-index:60;background:rgba(20,16,12,.55);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;padding:20px}
.paywall-card{position:relative;width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:28px 24px;text-align:center}
.paywall-x{position:absolute;top:12px;right:14px;font-size:16px;color:var(--faint);background:none;border:0;cursor:pointer;line-height:1}
.paywall-ic{font-size:34px}
.paywall-card h3{font-size:18px;font-weight:900;color:var(--ink);margin-top:6px}
.paywall-card p{font-size:13.5px;font-weight:600;color:var(--muted);margin-top:8px;line-height:1.5}
.paywall-actions{display:flex;flex-direction:column;gap:9px;margin-top:16px}
.paywall-actions .btn{width:100%;justify-content:center}
.paywall-soon{font-size:12px;font-weight:700;color:var(--d1);background:var(--d1s);border-radius:10px;padding:9px 11px;margin-top:12px}
.pchip.locked,.rchip.locked,.seg button.locked,.pick-dom.locked .pd-all{opacity:.6;cursor:pointer}
.pick-dom.locked{opacity:.9}
.learn-quick{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 2px}
.lq{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:100px;border:1px solid var(--line);background:var(--surface);font-weight:800;font-size:12.5px;color:var(--muted);box-shadow:var(--shadow);transition:background .15s,color .15s}
.lq:hover{background:var(--surface2);color:var(--ink)}
.exam-trend{display:flex;align-items:flex-end;gap:4px;height:46px;padding:12px 16px 4px}
.exam-trend i{display:inline-block;width:10px;border-radius:3px;opacity:.9}
.exam-trend .et-lbl{font-family:var(--mono);font-size:10px;color:var(--faint);margin-left:8px;align-self:flex-end}