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22px;border-radius:12px;opacity:.45;pointer-events:none;transition:opacity .2s}.adcont.ready{opacity:1;pointer-events:auto;background:linear-gradient(135deg,var(--amber),var(--amber-dk))}.pwsheet{width:100%;max-width:480px;background:var(--card);border-radius:24px 24px 0 0;padding:22px 20px calc(26px + var(--safe-bot));box-shadow:var(--shadow-lg);animation:pwUp .34s cubic-bezier(.2,.8,.3,1) both}@keyframes pwUp{from{transform:translateY(100%)}to{transform:none}}.pwsheet .grip{width:40px;height:4px;border-radius:99px;background:var(--line);margin:0 auto 14px}.pwcrown{font-size:42px;text-align:center;margin:2px 0 6px;filter:drop-shadow(0 4px 10px rgba(244,160,18,.4))}.pwtitle{font-size:21px;font-weight:800;text-align:center;color:var(--text);margin-bottom:6px}.pwsub{font-size:13px;color:var(--muted);text-align:center;line-height:1.5;margin-bottom:16px;padding:0 6px}.perks{display:flex;flex-direction:column;gap:10px;margin-bottom:18px}.perk{display:flex;align-items:center;gap:11px;font-size:14px;font-weight:600;color:var(--text)}.perk .pk{width:26px;height:26px;flex:0 0 26px;border-radius:50%;background:rgba(31,158,107,.16);color:var(--green);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:900}.subbtn{width:100%;border:none;border-radius:15px;padding:16px;font-size:16px;font-weight:800;color:#1a1205;background:linear-gradient(135deg,#ffc24b,#f4a012);box-shadow:0 8px 22px rgba(244,160,18,.4);cursor:pointer;transition:transform .12s,filter .12s}.subbtn:active{transform:scale(.97)}.subbtn:hover{filter:brightness(1.05)}.codewrap{margin-top:16px;border-top:1px solid var(--line);padding-top:16px}.codelbl{font-size:12px;color:var(--muted);text-align:center;margin-bottom:9px;font-weight:600}.codrow{display:flex;gap:8px}.codinput{flex:1;min-width:0;border:1.5px solid var(--line);background:var(--card-2);border-radius:12px;padding:13px 14px;font-size:15px;color:var(--text);outline:0;font-family:var(--font);transition:border-color .15s}.codinput:focus{border-color:var(--amber)}.codbtn{border:none;border-radius:12px;padding:0 20px;font-size:14px;font-weight:700;color:#fff;background:var(--navy);cursor:pointer;transition:transform .12s}.codbtn:active{transform:scale(.95)}.pwlater{display:block;width:100%;text-align:center;margin-top:14px;background:0 0;border:none;color:var(--muted);font-size:14px;font-weight:600;padding:6px;cursor:pointer}.pmbadge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--amber),var(--amber-dk));padding:4px 11px;border-radius:99px}[data-theme=dark] .adbox{background:linear-gradient(135deg,#1a2740,#0c1830)}@media (prefers-reduced-motion:reduce){.adcard,.ovl,.pwsheet{animation:none}}@media (min-width:1180px){body{background:radial-gradient(1100px 700px at 50% -10%,rgba(244,160,18,.1),transparent 60%),radial-gradient(900px 700px at 50% 120%,rgba(19,49,92,.12),transparent 55%),var(--bg)}#app{box-shadow:0 0 0 1px var(--line),0 36px 90px rgba(11,37,69,.2);min-height:100vh}.bottomnav{box-shadow:0 0 0 1px var(--line),0 -10px 30px rgba(11,37,69,.12)}}*{-webkit-tap-highlight-color:transparent}button{touch-action:manipulation}.policy{font-size:13px;line-height:1.6}.policy p{margin:0 0 9px;color:var(--muted)}.policy h4{margin:14px 0 4px;font-size:13px;color:var(--amber-dk)}.policy a{color:var(--navy);word-break:break-word}.cbx{position:fixed;inset:0;z-index:1300;background:rgba(8,16,28,.55);display:flex;align-items:center;justify-content:center;padding:24px;animation:cbxIn .2s ease both}@keyframes cbxIn{from{opacity:0}to{opacity:1}}.cbox{width:100%;max-width:330px;background:var(--card);border-radius:18px;padding:22px 20px;text-align:center;box-shadow:var(--shadow-lg);animation:cboxUp .25s cubic-bezier(.2,.8,.3,1) both}@keyframes cboxUp{from{transform:translateY(12px) scale(.97);opacity:0}to{transform:none;opacity:1}}.cbi{font-size:34px;margin-bottom:8px}.cbt{font-size:15px;font-weight:600;color:var(--text);line-height:1.5;margin-bottom:18px}.cbtns{display:flex;gap:10px}.cbtns button{flex:1;border:none;border-radius:12px;padding:13px;font-size:15px;font-weight:800;cursor:pointer;font-family:var(--font);transition:transform .1s,filter .12s}.cbtns button:active{transform:scale(.96)}.cno{background:var(--card-2);color:var(--text);border:1.5px solid var(--line)!important}.cyes{background:linear-gradient(135deg,#ff6b5e,#e23b2e);color:#fff}.cyes:hover{filter:brightness(1.05)}body.web-practice-page{padding-top:0}.practice-sitebar{position:sticky;top:0;z-index:10050;background:#071a31;color:#fff;border-bottom:3px solid var(--amber);min-height:50px;display:flex;align-items:center;justify-content:center}.practice-sitebar .inner{width:min(100%,900px);padding:7px 12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.practice-sitebar a{color:#fff;text-decoration:none;font-weight:800;font-size:13px;min-height:36px;display:inline-flex;align-items:center;padding:0 10px;border-radius:8px}.practice-sitebar .home-link{background:var(--amber);color:#142033}.practice-sitebar .guide-link{border:1px solid rgba(255,255,255,.35)}.practice-intro{max-width:900px;margin:0 auto;padding:24px 18px 12px;color:var(--text)}.practice-intro h1{font-family:var(--serif);font-size:clamp(30px,7vw,48px);line-height:1.08;color:var(--navy);margin:0 0 12px}.practice-intro>p{font-size:16px;line-height:1.65;color:var(--muted);margin:0 0 12px}.practice-intro-links{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.practice-intro-links a{background:var(--card);border:1px solid var(--line);border-radius:999px;color:var(--navy);font-size:13px;font-weight:750;text-decoration:none;padding:8px 12px}.practice-intro details{background:var(--card);border:1px solid var(--line);border-radius:14px;margin:14px 0 6px;padding:0 16px}.practice-intro summary{cursor:pointer;font-weight:800;color:var(--navy);padding:14px 0}.practice-intro details p{line-height:1.65;color:var(--muted)}.practice-intro details h2{font-family:var(--serif);font-size:23px;color:var(--navy);margin:22px 0 8px}.practice-intro .start-jump{display:inline-flex;background:var(--navy);color:#fff;text-decoration:none;font-weight:850;padding:11px 16px;border-radius:10px;margin:4px 0 10px}body.web-practice-page .topbar{top:50px}body.web-practice-page #app{scroll-margin-top:110px}.practice-noscript{max-width:700px;margin:20px auto;padding:18px;background:#fff2cf;border:1px solid #e6bd58;border-radius:12px}@media(max-width:520px){.practice-sitebar .inner{padding:6px 8px}.practice-sitebar a{font-size:12px;padding:0 8px}.practice-sitebar .guide-link{display:none}.practice-intro{padding:20px 14px 8px}.practice-intro h1{font-size:34px}body.web-practice-page .topbar{top:50px}}body.web-practice-page:not(.practice-active) #nav{display:none}body.web-practice-page:not(.practice-active) #app .topbar{position:relative;top:0}body,html{width:100%;max-width:100%;min-width:0;overflow-x:hidden}body.web-practice-page{min-height:100%;overflow-wrap:anywhere}#app{width:100%;max-width:760px;min-width:0}#app *,.practice-intro *,.practice-sitebar *{min-width:0}canvas,img,svg,video{max-width:100%}.screen{width:100%}.topbar .brand{min-width:0;flex:1}.topbar .brand>span:last-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.practice-intro,.practice-sitebar .inner{width:min(100%,960px)}.practice-intro-links{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin;padding-bottom:4px}.practice-intro-links a{flex:0 0 auto}.practice-loader-card{text-align:center;max-width:620px;margin:20px auto}.practice-loader-card h1,.practice-loader-card h2{margin:4px 0 8px;color:var(--text);font-size:clamp(1.5rem,4vw,2rem)}.practice-loader-card p{color:var(--muted)}.loader-spin{width:34px;height:34px;margin:4px auto 12px;border:4px solid var(--line);border-top-color:var(--amber);border-radius:50%;animation:sp .75s linear infinite}html[data-theme=dark] body{color:var(--text)}html[data-theme=dark] .policy a,html[data-theme=dark] .practice-intro h1,html[data-theme=dark] .practice-intro h2,html[data-theme=dark] .practice-intro summary,html[data-theme=dark] .practice-intro-links a{color:#dceaff}html[data-theme=dark] .practice-intro .start-jump{background:#244d7d;color:#fff;border:1px solid #4f78a8}html[data-theme=dark] .practice-intro details,html[data-theme=dark] .practice-intro-links a{background:#121d2c;border-color:#31445e}html[data-theme=dark] .practice-intro details p,html[data-theme=dark] .practice-intro>p{color:#b7c4d4}html[data-theme=dark] .sect-title{color:#b3c0d0}html[data-theme=dark] .cnm b,html[data-theme=dark] .ol b,html[data-theme=dark] .reviewitem .q,html[data-theme=dark] .setrow .info b,html[data-theme=dark] .sheet h3,html[data-theme=dark] .srow .lbl b,html[data-theme=dark] .study-q .qt,html[data-theme=dark] .tile h3{color:#eef3f8}html[data-theme=dark] .timer{color:#eef3f8}html[data-theme=dark] .feedback .exp,html[data-theme=dark] .qtext{color:#eef3f8}html[data-theme=dark] .card,html[data-theme=dark] .reviewitem,html[data-theme=dark] .setrow,html[data-theme=dark] .sheet,html[data-theme=dark] .study-q,html[data-theme=dark] .tile{color:#e8edf3}html[data-theme=dark] .ol span,html[data-theme=dark] .reviewitem .meta,html[data-theme=dark] .setrow .info span,html[data-theme=dark] .srow .lbl span,html[data-theme=dark] .study-q .meta,html[data-theme=dark] .tile p{color:#aebdce}html[data-theme=dark] a:not(.start-jump):not(.home-link):not(.guide-link){color:#9fc8ff}html[data-theme=dark] .practice-noscript{background:#362a12;color:#fff1c9;border-color:#8b6d24}@media (min-width:760px){#app{max-width:960px}.bottomnav{max-width:960px}.screen{padding:22px 24px 118px}.grid{grid-template-columns:repeat(4,minmax(0,1fr))}.feedback,.nextbtn,.qcard,.qhead,.ring-wrap,.rstats{max-width:760px;margin-left:auto;margin-right:auto}.qcard{min-height:260px}.sheet{max-width:700px}}@media (min-width:1180px){#app{max-width:1040px}.bottomnav{max-width:1040px}.practice-intro,.practice-sitebar .inner{width:min(100%,1040px)}}@media (max-width:759px){#app{max-width:none}.screen{padding:13px 12px 104px}.card{padding:15px;border-radius:16px}.qcard{padding:17px;min-height:0;border-radius:18px}.qtext{font-size:clamp(15px,4.4vw,18px);line-height:1.55}[dir=rtl] .qtext{font-size:clamp(17px,5vw,20px);line-height:1.85}.tfbtns{gap:9px;margin-top:14px}.tf{padding:14px 6px;border-radius:15px}.hero .row{gap:8px}.stat{padding:10px 5px}.stat b{font-size:21px}.topbar{padding-left:12px;padding-right:10px}.topbar .brand{gap:8px;font-size:14px}.topbar .logo{width:32px;height:32px;flex:0 0 32px}#streakPill{flex:0 0 auto;padding:0 8px}.practice-intro{padding:17px 13px 8px}.practice-intro h1{font-size:clamp(28px,9vw,38px);line-height:1.04}.practice-intro>p{font-size:15px;line-height:1.55}.practice-intro .practice-secondary{font-size:14px}.practice-intro-links{margin:12px -2px;padding:0 2px 6px}.practice-intro .start-jump{width:100%;justify-content:center;text-align:center;margin-top:0}.practice-intro details{padding:0 13px}.practice-intro summary{line-height:1.35}.practice-intro details h2{font-size:20px}.bottomnav button{font-size:9px;padding-left:2px;padding-right:2px}.bottomnav button .ic{font-size:18px}.rstats{gap:6px}.rstats .b{padding:9px 4px}.rstats .b b{font-size:18px}.figbox.img .inner{max-width:100%}.figbox.img img{max-height:min(38vh,240px)}}@media (max-width:420px){.qhead{gap:7px}.timer{font-size:13px;padding:5px 7px}.qcount{font-size:12px}}@media (max-width:350px){.grid{grid-template-columns:1fr}.tile.wide{grid-column:auto}.practice-sitebar .home-link{font-size:11px}.practice-intro .practice-secondary{display:none}.hero h2{font-size:18px}}
/* Keyboard focus — shared accessibility treatment. */
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:3px solid #1160a6;outline-offset:3px;border-radius:4px}
.practice-sitebar a:focus-visible{outline-color:#ffd06b}
.practice-skip{position:absolute;inset-inline-start:-9999px;top:8px;z-index:1000;background:#fff;color:#062b4f;padding:10px 14px;border-radius:6px;font-weight:800}
.practice-skip:focus{inset-inline-start:12px;outline:3px solid #1160a6;outline-offset:2px}

/* Layout correction v4 — keep related-guide links fully visible on narrow screens. */
@media(max-width:759px){
  .practice-intro-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));overflow:visible;margin:12px 0;padding:0;gap:8px}
  .practice-intro-links a{min-width:0;white-space:normal;text-align:center;display:flex;align-items:center;justify-content:center;line-height:1.25;padding:9px 8px}
}
@media(max-width:430px){
  .practice-intro-links{grid-template-columns:minmax(0,1fr)}
  .practice-intro h1{font-size:clamp(30px,9.5vw,36px)}
}


/* Days 8–14: simplified question experience */
.wording-panel{max-width:720px;margin:10px auto 12px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 4px 18px rgba(11,37,69,.08)}
.wording-copy{min-width:0}.wording-copy strong{display:block;color:var(--navy);font-size:14px}.wording-copy span{display:block;margin-top:2px;color:var(--muted);font-size:11px;line-height:1.4}
.wording-buttons{display:inline-flex;flex:0 0 auto;padding:3px;border:1px solid var(--line);border-radius:11px;background:var(--bg)}
.wording-buttons button{min-height:36px;padding:0 11px;border:0;border-radius:8px;background:transparent;color:var(--muted);font:800 12px/1 system-ui,sans-serif;cursor:pointer}
.wording-buttons button.on{background:var(--navy);color:#fff;box-shadow:0 2px 8px rgba(11,37,69,.18)}
.wording-buttons button:disabled{opacity:.48;cursor:not-allowed}
.question-support-actions{display:flex;justify-content:flex-end;margin:10px 0 0}
.question-report-link{display:inline-flex;align-items:center;min-height:34px;padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--muted);font:750 11px/1.2 system-ui,sans-serif;text-decoration:none}
.question-report-link::before{content:"?";display:grid;place-items:center;width:18px;height:18px;margin-inline-end:6px;border-radius:50%;background:var(--amber-pale);color:#744700;font-weight:900}
.question-report-link:hover{border-color:var(--navy);color:var(--navy)}
.qcard{border:1px solid var(--line);box-shadow:0 10px 30px rgba(11,37,69,.08)}
.qtext{font-size:clamp(19px,4.8vw,24px);line-height:1.52;font-weight:720;letter-spacing:-.01em}
.tfbtns{gap:12px}.tf{min-height:68px;border-width:2px}.tf .sym{font-size:25px}
.feedback .exp{font-size:15px;line-height:1.65}
.study-q .qt{font-size:17px;line-height:1.55}.study-q .ex{line-height:1.65}
@media(max-width:620px){
  .wording-panel{margin:8px 10px 10px;padding:11px;align-items:stretch;flex-direction:column;gap:9px}
  .wording-buttons{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .wording-buttons button{min-height:42px;font-size:13px}
  .qcard{padding:18px 15px}.qtext{font-size:20px;line-height:1.5}
  .tfbtns{grid-template-columns:1fr 1fr}.tf{min-height:64px;padding:10px 6px}
  .question-support-actions{justify-content:flex-start}
}
@media(prefers-reduced-motion:reduce){.wording-buttons button,.question-report-link{transition:none}}

/* Clean practice UI: no level/XP, daily-goal, or embedded ad area. */
.screen>.sect-title:first-of-type{margin-top:18px}

/* Pre-deployment practice layout and accessibility safeguards. */
body.web-practice-page{--practice-sitebar-height:59px}
.practice-sitebar{height:var(--practice-sitebar-height);min-height:var(--practice-sitebar-height)}
.practice-sitebar .inner{padding-block:6px}
body.web-practice-page .topbar{top:var(--practice-sitebar-height)}
body.web-practice-page #app{scroll-margin-top:calc(var(--practice-sitebar-height) + 12px)}
.practice-study-guide{padding-top:36px;padding-bottom:calc(96px + var(--safe-bot));border-top:1px solid var(--line)}

/* Keep frequently used controls at or above the 44px touch-target baseline. */
.practice-sitebar a,
.practice-intro-links a,
.practice-intro .start-jump,
.iconbtn,
.back,
.seg button,
.chip,
.toggles button,
.bottomnav button,
.lang-opt,
.opt-row,
.contact-opt,
.adcont,
.codbtn,
.pwlater,
.cbtns button,
.wording-buttons button,
.question-report-link{min-height:44px}
.iconbtn{width:44px;height:44px}
#streakPill{height:44px;min-height:44px}
.qfav{min-width:44px;min-height:44px;display:grid;place-items:center}
.switch{width:58px;height:44px;border-radius:24px}
.switch i{top:7px;left:7px;width:30px;height:30px}
.switch.on i{left:21px}
[dir=rtl] .switch i{left:auto;right:7px}
[dir=rtl] .switch.on i{right:21px}

@media(max-width:520px){
  .practice-sitebar .inner{padding-block:6px}
  body.web-practice-page .topbar{top:var(--practice-sitebar-height)}
}
:root{--o1-ink:#17191d;--o1-muted:#6f7379;--o1-line:#e6e8eb;--o1-paper:#fff;--o1-soft:#f7f5f1;--o1-orange:#f4672d;--o1-orange-dark:#d9531d;--o1-blue:#182d70;--o1-shadow:0 18px 50px rgba(25,31,43,.08)}
#app{background:var(--o1-paper);color:var(--o1-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:720px}
.o1-topbar{align-items:center;border-bottom:1px solid var(--o1-line);display:flex;justify-content:space-between;padding:20px clamp(20px,5vw,72px);background:var(--o1-paper)}
.o1-brand{align-items:center;background:none;border:0;color:var(--o1-ink);cursor:pointer;display:flex;gap:12px;padding:0;text-align:left}.o1-brand b{display:block;font-size:15px;letter-spacing:-.02em}.o1-brand small{color:var(--o1-muted);display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase}.o1-mark{align-items:center;background:var(--o1-ink);border-radius:9px;color:#fff;display:inline-flex;font-size:18px;font-weight:800;height:36px;justify-content:center;width:36px}.o1-top-actions{display:flex;gap:10px}.o1-text-btn,.o1-back{background:none;border:0;color:var(--o1-muted);cursor:pointer;font-weight:700;padding:9px 12px}.o1-text-btn:hover,.o1-back:hover{color:var(--o1-orange)}
.o1-home{margin:0 auto;max-width:1120px;padding:clamp(36px,7vw,80px) clamp(20px,5vw,60px)}.o1-hero{margin-bottom:42px;max-width:650px}.o1-kicker,.o1-eyebrow{color:var(--o1-orange);font-size:12px;font-weight:800;letter-spacing:.18em;text-transform:uppercase}.o1-hero h1{font-size:clamp(38px,6vw,72px);letter-spacing:-.065em;line-height:.98;margin:13px 0 20px}.o1-hero p{color:var(--o1-muted);font-size:17px;line-height:1.65;margin:0}.o1-routes{display:grid;gap:20px;grid-template-columns:repeat(2,minmax(0,1fr))}.o1-route-card{background:var(--o1-soft);border:1px solid var(--o1-line);border-radius:22px;display:flex;flex-direction:column;min-height:355px;overflow:hidden;padding:28px;position:relative}.o1-route-card:after{background:var(--o1-orange);border-radius:50%;content:"";height:180px;opacity:.08;position:absolute;right:-60px;top:-60px;width:180px}.o1-route-card.o1-final:after{background:var(--o1-blue)}.o1-route-icon{align-items:center;background:var(--o1-paper);border:1px solid var(--o1-line);border-radius:12px;color:var(--o1-orange);display:flex;font-size:25px;font-weight:800;height:48px;justify-content:center;width:48px}.o1-final .o1-route-icon{color:var(--o1-blue)}.o1-route-copy{margin-top:28px;position:relative;z-index:1}.o1-route-copy h2{font-size:32px;letter-spacing:-.04em;margin:7px 0 7px}.o1-route-copy p{color:var(--o1-muted);margin:0}.o1-count{color:var(--o1-muted);font-size:13px;margin-top:12px}.o1-route-actions{display:grid;gap:10px;grid-template-columns:1fr 1fr;margin-top:auto;position:relative;z-index:1}.o1-mode{background:var(--o1-paper);border:1px solid var(--o1-line);border-radius:13px;cursor:pointer;display:grid;gap:4px;padding:15px;text-align:left}.o1-mode b{font-size:15px}.o1-mode small{color:var(--o1-muted);font-size:11px;line-height:1.35}.o1-mode span{color:var(--o1-orange);font-size:19px;justify-self:end;margin-top:-23px}.o1-mode:hover{border-color:var(--o1-orange);transform:translateY(-2px)}.o1-test{background:var(--o1-orange);border-color:var(--o1-orange);color:#fff}.o1-test small,.o1-test span{color:#fff}.o1-footnote{color:var(--o1-muted);font-size:13px;margin:28px 0 0;text-align:center}
.o1-mode-head{align-items:center;display:flex;gap:14px;margin:0 auto;max-width:900px;padding:30px 20px 10px}.o1-pill{background:#fff1eb;border-radius:999px;color:var(--o1-orange-dark);font-size:12px;font-weight:800;padding:8px 13px}.o1-progress{color:var(--o1-muted);font-size:13px;margin-left:auto}.o1-question-card{background:var(--o1-paper);border:1px solid var(--o1-line);border-radius:22px;box-shadow:var(--o1-shadow);margin:18px auto;max-width:900px;padding:clamp(24px,5vw,54px)}.o1-question-label{color:var(--o1-orange);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.o1-question-card h1{font-size:clamp(25px,4vw,42px);letter-spacing:-.04em;line-height:1.15;margin:18px 0 28px}.o1-figure{background:#f5f6f8;border-radius:14px;margin:0 0 26px;overflow:hidden;text-align:center}.o1-figure img,.o1-figure svg{display:block;height:auto;margin:auto;max-height:420px;max-width:100%;width:auto}.o1-figure-text{background:#f5f6f8;border-radius:12px;color:var(--o1-muted);padding:16px}.o1-answer-box{background:#f7f8fa;border-left:4px solid var(--o1-orange);border-radius:10px;padding:18px 20px}.o1-answer-box b{font-size:13px;text-transform:uppercase}.o1-answer-value{color:var(--o1-orange-dark);font-weight:800;margin-left:12px}.o1-answer-box p{color:var(--o1-muted);line-height:1.6;margin:12px 0 0}.o1-pager{display:flex;justify-content:space-between;margin:0 auto;max-width:900px;padding:0 20px 50px}.o1-primary,.o1-secondary{border-radius:11px;cursor:pointer;font-weight:800;padding:14px 20px}.o1-primary{background:var(--o1-orange);border:1px solid var(--o1-orange);color:#fff}.o1-primary:hover{background:var(--o1-orange-dark)}.o1-secondary{background:var(--o1-paper);border:1px solid var(--o1-line);color:var(--o1-ink)}.o1-secondary:disabled,.o1-primary:disabled{cursor:not-allowed;opacity:.4}.o1-test-note{background:#fff8f4;border-radius:10px;color:var(--o1-muted);font-size:13px;padding:13px 15px}.o1-choice-row{display:grid;gap:12px;grid-template-columns:1fr 1fr}.o1-choice{background:#fff;border:2px solid var(--o1-line);border-radius:12px;color:var(--o1-ink);cursor:pointer;font-size:17px;font-weight:800;padding:18px;text-align:left}.o1-choice.selected{background:#fff1eb;border-color:var(--o1-orange);color:var(--o1-orange-dark)}
.o1-result,.o1-settings{margin:0 auto;max-width:900px;padding:32px 20px 70px}.o1-result-card,.o1-settings-card{background:var(--o1-soft);border:1px solid var(--o1-line);border-radius:22px;margin-top:15px;padding:clamp(28px,6vw,70px);text-align:center}.o1-result-mark{align-items:center;border-radius:50%;display:flex;font-size:35px;height:75px;justify-content:center;margin:0 auto 22px;width:75px}.o1-result-mark.pass{background:#e7f7ee;color:#17834d}.o1-result-mark.fail{background:#fff0ed;color:var(--o1-orange)}.o1-result-card h1{font-size:42px;letter-spacing:-.05em;margin:8px 0}.o1-score{color:var(--o1-orange);font-size:88px;font-weight:900;letter-spacing:-.08em;line-height:1}.o1-score small{font-size:30px;letter-spacing:0}.o1-result-message{color:var(--o1-muted);margin:12px 0}.o1-result-card .o1-primary{margin-top:22px}.o1-settings-card{text-align:left}.o1-settings-card h1{font-size:42px;letter-spacing:-.05em;margin:8px 0 30px}.o1-settings-card label{color:var(--o1-muted);display:block;font-size:13px;font-weight:700}.o1-settings-card select{background:#fff;border:1px solid var(--o1-line);border-radius:9px;display:block;margin-top:8px;padding:12px;width:100%}.o1-setting-row{align-items:center;background:none;border:0;border-bottom:1px solid var(--o1-line);cursor:pointer;display:flex;justify-content:space-between;padding:20px 0;text-align:left;width:100%}.o1-setting-row b,.o1-setting-row small{display:block}.o1-setting-row small{color:var(--o1-muted);margin-top:5px}.o1-switch{background:#d9dce1;border-radius:20px;height:24px;position:relative;width:42px}.o1-switch:after{background:#fff;border-radius:50%;content:"";height:18px;left:3px;position:absolute;top:3px;transition:.2s;width:18px}.o1-switch.on{background:var(--o1-orange)}.o1-switch.on:after{left:21px}.o1-dark #app{--o1-ink:#f4f5f7;--o1-muted:#aeb4bf;--o1-line:#343b49;--o1-paper:#171b23;--o1-soft:#202631;--o1-shadow:0 18px 50px rgba(0,0,0,.22)}.o1-dark .o1-mode,.o1-dark .o1-secondary,.o1-dark .o1-choice,.o1-dark .o1-settings-card select{background:#171b23;color:var(--o1-ink)}.o1-dark .o1-answer-box,.o1-dark .o1-test-note{background:#252b35}.o1-dark .o1-pill{background:#38251f}
@media(max-width:760px){.o1-topbar{padding:16px 18px}.o1-text-btn{font-size:0;padding:8px}.o1-text-btn:last-child{font-size:0}.o1-text-btn:last-child:after{content:"⚙";font-size:18px}.o1-routes{grid-template-columns:1fr}.o1-route-card{min-height:320px;padding:23px}.o1-route-actions{grid-template-columns:1fr}.o1-mode-head{padding-top:20px}.o1-mode-head .o1-pill{font-size:11px}.o1-question-card{border-radius:16px;margin:12px 12px 18px;padding:24px 20px}.o1-question-card h1{font-size:27px}.o1-pager{padding-left:12px;padding-right:12px}.o1-choice-row{grid-template-columns:1fr}.o1-result,.o1-settings{padding-left:12px;padding-right:12px}.o1-result-card,.o1-settings-card{padding:30px 22px}.o1-progress{font-size:11px}}
/* Practice page shell — applied after the legacy and app styles. */
html{scroll-behavior:smooth}
body.web-practice-page{background:#f7f3ed;color:#17191d;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;margin:0;overflow-x:hidden}
body.web-practice-page *{box-sizing:border-box}
.practice-sitebar{background:#10243a!important;border:0!important;box-shadow:0 8px 30px rgba(5,18,31,.14);height:auto!important;min-height:0!important;overflow:visible!important;padding:0!important;position:relative;z-index:20}
.practice-sitebar .inner{align-items:center;display:flex;gap:12px;height:auto!important;justify-content:space-between;margin:0 auto;max-width:1240px;min-height:0!important;padding:14px clamp(16px,4vw,48px)!important}
.practice-sitebar .practice-header-link{align-items:center;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);border-radius:12px;color:#fff!important;display:flex;font-size:14px;font-weight:750;gap:11px;line-height:1.2;min-height:48px;padding:10px 15px;text-decoration:none!important;transition:background .2s,border-color .2s,transform .2s}
.practice-sitebar .practice-header-link:hover{background:rgba(244,103,45,.22);border-color:#f4672d;transform:translateY(-1px)}
.practice-header-link .link-icon{align-items:center;background:#f4672d;border-radius:8px;display:inline-flex;font-size:18px;height:30px;justify-content:center;min-width:30px}
.practice-header-link .link-copy{display:flex;flex-direction:column}.practice-header-link small{color:#b9c6d2;font-size:10px;font-weight:650;letter-spacing:.07em;margin-top:3px;text-transform:uppercase}
#practice-main{margin:0 auto;max-width:1440px;padding:0 clamp(12px,3vw,38px) 48px;width:100%}
.practice-intro:first-of-type{background:linear-gradient(135deg,#fff 0%,#fff9f4 100%);border:1px solid #e8e2db;border-radius:22px;margin:30px auto 20px;max-width:1180px;padding:clamp(28px,5vw,64px)!important}
.practice-intro:first-of-type h1{color:#17191d;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important;font-size:clamp(40px,7vw,76px);font-weight:850;letter-spacing:-.065em;line-height:1;margin:0 0 20px;max-width:900px}
.practice-intro:first-of-type p{color:#5f6570;font-size:clamp(16px,2vw,20px);line-height:1.65;margin:0;max-width:900px}
#app{border:1px solid #e1e4e8;border-radius:22px;box-shadow:0 24px 70px rgba(27,34,45,.09);margin:0 auto;max-width:1180px;min-height:680px;overflow:hidden;width:100%}
#app #topbar{background:var(--o1-paper)!important;border:0!important;display:block!important;min-height:0!important;padding:0!important;position:static!important;top:auto!important;width:100%!important}
#app .o1-topbar{position:relative;width:100%!important;z-index:12}
.o1-language-control{align-items:center;color:var(--o1-muted);display:flex;font-size:12px;font-weight:800;gap:10px;letter-spacing:.03em;position:relative}
.o1-language-control>span{white-space:nowrap}
.o1-language-control select{appearance:auto!important;background:var(--o1-paper)!important;border:1px solid var(--o1-line)!important;border-radius:10px!important;color:var(--o1-ink)!important;cursor:pointer!important;font:inherit!important;height:42px!important;min-width:145px!important;padding:0 12px!important;pointer-events:auto!important;position:relative!important;z-index:50!important}
.o1-language-control select:focus{border-color:var(--o1-orange)!important;box-shadow:0 0 0 3px rgba(244,103,45,.16)!important;outline:0!important}
.practice-study-guide{background:#fff;border:1px solid #e5e7eb;border-radius:20px;margin:24px auto 0!important;max-width:1180px;padding:clamp(24px,4vw,44px)!important}
.practice-study-guide .practice-secondary{background:#f8fafc;border-left:4px solid #f4672d;border-radius:10px;color:#56606d;line-height:1.65;margin:0 0 24px;padding:15px 18px}
.practice-study-guide .learning-mode-intro{background:#fff8f3;border:1px solid #f3d8ca;border-radius:16px;margin:0 0 20px;padding:22px}
.practice-study-guide .learning-mode-intro h2{color:#1c2027;font-size:23px;margin:0 0 10px}.practice-study-guide .learning-mode-intro p{color:#606874;line-height:1.65;margin:8px 0}
.practice-study-guide details{background:#f8fafc;border:1px solid #e5e7eb;border-radius:16px;padding:0 22px}.practice-study-guide summary{color:#1b2636;cursor:pointer;font-size:17px;font-weight:800;padding:20px 0}.practice-study-guide details h2{color:#1b2636;font-size:21px;margin:24px 0 8px}.practice-study-guide details p{color:#5d6672;line-height:1.7}.practice-study-guide details a{color:#c94c18;font-weight:700}
.practice-footer{background:#10243a!important;border-radius:22px;color:#fff!important;margin:24px auto 0!important;max-width:1180px;padding:clamp(30px,5vw,52px)!important;width:100%}
.practice-footer .footer-inner{margin:0 auto;max-width:1080px}.practice-footer h2{color:#fff!important;font-size:24px;margin:0 0 8px}.practice-footer .footer-intro{color:#b9c6d2;line-height:1.55;margin:0 0 24px}.practice-footer-grid{display:grid;gap:11px 18px;grid-template-columns:repeat(3,minmax(0,1fr))}
.practice-footer .practice-footer-grid a{align-items:center;background:rgba(255,255,255,.075)!important;border:1px solid rgba(255,255,255,.13)!important;border-radius:10px!important;color:#f7f9fb!important;display:flex!important;font-size:13px!important;font-weight:700!important;min-height:44px!important;padding:10px 12px!important;text-decoration:none!important;transition:background .2s,border-color .2s!important}
.practice-footer .practice-footer-grid a:after{color:#f4672d;content:"→";margin-left:auto;padding-left:8px}.practice-footer .practice-footer-grid a:hover{background:rgba(244,103,45,.18)!important;border-color:#f4672d!important;color:#fff!important}
.practice-footer small{border-top:1px solid rgba(255,255,255,.13);color:#aebdca!important;display:block;margin-top:28px;padding-top:20px}
.o1-dark .practice-sitebar,.o1-dark .practice-footer{background:#0b1726!important}.o1-dark body.web-practice-page,body.o1-dark.web-practice-page{background:#10141b;color:#f4f5f7}.o1-dark .practice-intro:first-of-type,.o1-dark .practice-study-guide{background:#171b23;border-color:#343b49}.o1-dark .practice-intro:first-of-type h1,.o1-dark .practice-study-guide h2,.o1-dark .practice-study-guide summary{color:#f4f5f7}.o1-dark .practice-intro:first-of-type p,.o1-dark .practice-study-guide p{color:#aeb4bf}.o1-dark .practice-study-guide .practice-secondary,.o1-dark .practice-study-guide details{background:#202631;border-color:#343b49}.o1-dark .practice-study-guide .learning-mode-intro{background:#2c211d;border-color:#573b2f}
@media(max-width:760px){.practice-sitebar .inner{align-items:stretch;display:grid;grid-template-columns:1fr;padding:10px 12px!important}.practice-sitebar .practice-header-link{font-size:13px;min-height:50px;padding:9px 11px}.practice-header-link .link-icon{font-size:16px;height:30px;min-width:30px}.practice-header-link small{font-size:8px}.practice-header-link .link-copy{min-width:0}.practice-header-link .link-copy strong{white-space:normal}#practice-main{padding:0 10px 30px}.practice-intro:first-of-type{border-radius:16px;margin:14px auto 12px;padding:26px 20px!important}.practice-intro:first-of-type h1{font-size:clamp(37px,12vw,56px)}#app{border-radius:16px;min-height:600px}.o1-topbar{align-items:center;padding:13px 14px!important}.o1-brand b{font-size:13px}.o1-brand small{font-size:9px}.o1-mark{height:34px;width:34px}.o1-language-control{gap:5px}.o1-language-control>span{font-size:0}.o1-language-control>span:first-letter{font-size:16px}.o1-language-control select{height:40px!important;min-width:112px!important;max-width:126px!important;padding:0 7px!important}.o1-home{padding:32px 16px!important}.o1-hero{margin-bottom:26px}.o1-hero h1{font-size:43px}.o1-route-card{border-radius:16px;min-height:0!important}.o1-route-actions{margin-top:24px}.o1-mode{min-height:72px}.o1-mode small{font-size:10px}.o1-mode-head{align-items:flex-start;flex-wrap:wrap;padding:16px 12px 4px}.o1-progress{margin-left:auto}.o1-pill{order:3;width:100%}.o1-question-card{margin:10px 0 16px!important}.o1-pager{gap:8px;padding:0 0 30px!important}.o1-pager button{flex:1;padding:13px 8px}.practice-study-guide{border-radius:16px;margin-top:16px!important;padding:20px 15px!important}.practice-footer{border-radius:16px;margin-top:16px!important;padding:28px 16px!important}.practice-footer-grid{grid-template-columns:1fr}.practice-footer .practice-footer-grid a{min-height:42px!important}}
@media(max-width:380px){.practice-sitebar .inner{grid-template-columns:1fr}.practice-sitebar .practice-header-link{min-height:46px}.o1-brand span:last-child{display:none}.o1-language-control select{min-width:120px!important}.o1-hero h1{font-size:37px}}

/* Direct two-step start flow and viewport-sized question workspace. */
body.web-practice-page{background:#f4f1ec;padding-top:0!important}
#practice-main{max-width:none;padding:0 14px 42px}
#app{border-radius:0 0 22px 22px;margin:0 auto;max-width:1180px;min-height:0}
.o1-simplebar{min-height:64px;padding:10px clamp(16px,3vw,30px)!important}
.o1-mini-title{color:var(--o1-ink);font-size:14px;font-weight:850;letter-spacing:-.02em}
.o1-start-screen{align-items:center;display:flex;flex-direction:column;justify-content:center;margin:0 auto;min-height:calc(100svh - 66px);padding:clamp(24px,5vw,60px);width:min(900px,100%)}
.o1-start-copy{margin:0 auto 34px;max-width:660px;text-align:center}.o1-start-copy h1{font-size:clamp(38px,6vw,68px);letter-spacing:-.06em;line-height:1;margin:10px 0 14px}.o1-start-copy p{color:var(--o1-muted);font-size:17px;margin:0}
.o1-test-select-grid,.o1-mode-select-grid{display:grid;gap:18px;grid-template-columns:1fr 1fr;width:100%}
.o1-test-select{align-items:center;background:var(--o1-soft);border:1px solid var(--o1-line);border-radius:20px;color:var(--o1-ink);cursor:pointer;display:grid;grid-template-columns:auto 1fr auto;min-height:190px;padding:28px;text-align:left;transition:border-color .2s,box-shadow .2s,transform .2s}.o1-test-select:hover{border-color:var(--o1-orange);box-shadow:var(--o1-shadow);transform:translateY(-3px)}
.o1-test-select .o1-route-icon{font-size:22px}.o1-select-copy{display:flex;flex-direction:column;margin-left:18px}.o1-select-copy small{color:var(--o1-orange);font-size:11px;font-style:normal;font-weight:850;letter-spacing:.16em}.o1-select-copy b{font-size:clamp(25px,3vw,34px);letter-spacing:-.04em;margin:7px 0 2px}.o1-select-copy .o1-test-meaning{color:var(--o1-muted);font-size:13px;font-weight:750;margin-bottom:13px}.o1-select-copy em{color:var(--o1-muted);font-size:13px;font-style:normal}.o1-select-arrow{color:var(--o1-orange);font-size:26px}
.o1-mode-screen{justify-content:center}.o1-mode-screen>.o1-back{align-self:flex-start;margin-bottom:18px}.o1-mode-select{background:var(--o1-paper);border:1px solid var(--o1-line);border-radius:18px;color:var(--o1-ink);cursor:pointer;display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:auto auto;min-height:190px;padding:28px;text-align:left}.o1-mode-select:hover{border-color:var(--o1-orange);box-shadow:var(--o1-shadow)}.o1-mode-symbol{font-size:30px;grid-row:1/3;margin-right:18px}.o1-mode-select b{font-size:25px;letter-spacing:-.03em}.o1-mode-select small{color:var(--o1-muted);font-size:13px;grid-column:2;line-height:1.5;margin-top:8px}.o1-mode-select>span:last-child{color:var(--o1-orange);font-size:24px;grid-column:3;grid-row:1/3}.o1-mode-test{background:var(--o1-orange);border-color:var(--o1-orange);color:#fff}.o1-mode-test small,.o1-mode-test>span:last-child{color:#fff}
.o1-workspace{display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:calc(100svh - 72px);margin:0 auto;max-width:1000px;overflow:hidden;padding:14px 22px 16px}.o1-workspace .o1-mode-head{margin:0;max-width:none;padding:4px 0 10px}.o1-test-head{gap:16px}.o1-timer{align-items:flex-start;display:flex;flex-direction:column;margin-left:4px}.o1-timer small{color:var(--o1-muted);font-size:9px;font-weight:700;letter-spacing:.07em;text-transform:uppercase}.o1-timer b{font-size:20px;font-variant-numeric:tabular-nums;letter-spacing:.04em}.o1-test-head .o1-progress{align-items:flex-end;display:flex;flex-direction:column;margin-left:auto}.o1-test-head .o1-progress small{color:var(--o1-muted);font-size:10px;margin-top:2px}.o1-submit{background:#1d382d;border:0;border-radius:9px;color:#fff;cursor:pointer;font-weight:800;padding:11px 16px}.o1-submit:hover{background:#142a21}
.o1-question-card.o1-compact-card{align-content:start;border-radius:17px;box-shadow:none;margin:0;max-width:none;min-height:0;overflow:auto;padding:clamp(20px,3vw,34px)}.o1-compact-card .o1-question-label{font-size:11px}.o1-question-card.o1-compact-card h1{font-size:clamp(19px,2.4vw,30px);line-height:1.22;margin:12px 0 18px}.o1-compact-card .o1-figure{margin:0 auto 16px;max-height:30vh}.o1-compact-card .o1-figure img,.o1-compact-card .o1-figure svg{max-height:28vh}.o1-compact-card .o1-answer-box{font-size:14px;padding:14px 17px}.o1-compact-card .o1-answer-box p{line-height:1.45;margin-top:8px}.o1-test-card.o1-compact-card{display:flex;flex-direction:column;justify-content:center}.o1-test-card.o1-compact-card .o1-choice-row{margin-top:8px}.o1-test-card.o1-compact-card .o1-choice{font-size:16px;padding:15px}
.o1-compact-pager{margin:0;max-width:none;padding:10px 0 0}.o1-compact-pager button{min-width:140px;padding:12px 18px}
.o1-question-rtl .o1-question-card h1,.o1-question-rtl .o1-question-card .o1-question-label,.o1-question-rtl .o1-question-card .o1-answer-box,.o1-question-rtl .o1-question-card .o1-choice,.o1-question-rtl .o1-question-card .o1-figure-text{direction:rtl;text-align:right}.o1-question-rtl .o1-question-card .o1-choice-row{direction:rtl}.o1-question-rtl .o1-question-card .o1-choice{justify-content:flex-start}.o1-question-rtl .o1-topbar,.o1-question-rtl .o1-start-screen,.o1-question-rtl .o1-mode-head,.o1-question-rtl .o1-pager,.o1-question-rtl .practice-footer{direction:ltr}
@media(max-width:760px){#practice-main{padding:0 0 28px}#app{border:0;border-radius:0;max-width:none}.o1-simplebar{min-height:58px;padding:8px 12px!important}.o1-mini-title{font-size:12px;max-width:150px}.o1-language-control select{min-width:108px!important}.o1-start-screen{justify-content:flex-start;min-height:calc(100svh - 58px);padding:34px 16px}.o1-start-copy{margin-bottom:24px}.o1-start-copy h1{font-size:40px}.o1-start-copy p{font-size:15px}.o1-test-select-grid,.o1-mode-select-grid{grid-template-columns:1fr}.o1-test-select,.o1-mode-select{border-radius:15px;min-height:132px;padding:20px}.o1-select-copy b,.o1-mode-select b{font-size:24px}.o1-mode-screen>.o1-back{margin-bottom:8px}.o1-workspace{height:calc(100svh - 66px);padding:8px 10px 10px}.o1-workspace .o1-mode-head{gap:7px;padding-bottom:7px}.o1-test-head .o1-back{font-size:11px;padding:7px}.o1-timer b{font-size:17px}.o1-test-head .o1-progress{font-size:11px}.o1-submit{font-size:11px;padding:9px}.o1-workspace .o1-pill{order:initial;width:auto}.o1-question-card.o1-compact-card{border-radius:13px;margin:0!important;padding:17px 15px}.o1-question-card.o1-compact-card h1{font-size:clamp(17px,5vw,21px);line-height:1.25;margin:9px 0 13px}.o1-compact-card .o1-figure,.o1-compact-card .o1-figure img,.o1-compact-card .o1-figure svg{max-height:22vh}.o1-compact-card .o1-answer-box{font-size:12px;padding:11px 13px}.o1-compact-card .o1-answer-box p{line-height:1.35}.o1-test-card.o1-compact-card .o1-choice{font-size:14px;padding:12px}.o1-compact-pager{gap:8px;padding:8px 0 0!important}.o1-compact-pager button{min-width:0;padding:10px 8px}.practice-study-guide,.practice-footer{margin-left:10px!important;margin-right:10px!important;width:auto}}
@media(max-height:700px) and (min-width:761px){.o1-start-screen{justify-content:flex-start;padding-top:28px}.o1-start-copy{margin-bottom:20px}.o1-test-select,.o1-mode-select{min-height:150px}.o1-question-card.o1-compact-card h1{font-size:23px}.o1-workspace{padding-top:8px}.o1-compact-card .o1-figure,.o1-compact-card .o1-figure img,.o1-compact-card .o1-figure svg{max-height:22vh}}