:root{
  --bg:#FAF8F3;
  --bg-2:#F2EFE7;
  --surface:#FFFFFF;
  --ink:#10131A;
  --ink-2:#3A4150;
  --muted:#6B7280;
  --line:#E6E1D6;
  --line-2:#D8D2C4;

  --brand:#2B4EFF;
  --brand-ink:#1A33C7;
  --brand-soft:#E8ECFF;
  --accent:#FFC73A;
  --accent-ink:#9A6A00;
  --accent-soft:#FFF4D6;
  --mint:#13B07B;
  --mint-ink:#0B7A55;
  --mint-soft:#DDF6EC;
  --coral:#F2555A;
  --coral-ink:#B8272C;
  --coral-soft:#FFE4E4;
  --violet:#8B5CF6;
  --violet-soft:#EFE8FF;

  --radius:18px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(16,19,26,.05),0 8px 24px rgba(16,19,26,.06);
  --shadow-lg:0 2px 4px rgba(16,19,26,.06),0 24px 60px rgba(16,19,26,.12);
  --font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Fraunces",Georgia,serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0E1117;--bg-2:#151922;--surface:#181D27;--ink:#F3F4F6;--ink-2:#C9CED8;--muted:#8D95A5;
    --line:#262C38;--line-2:#323A48;--brand:#6A84FF;--brand-ink:#9DB0FF;--brand-soft:#1C2447;
    --accent:#FFCF5C;--accent-ink:#FFD980;--accent-soft:#3A2F12;--mint:#2ECF98;--mint-ink:#6BE3B9;--mint-soft:#10352A;
    --coral:#FF6B70;--coral-ink:#FF9A9D;--coral-soft:#3E1C1E;--violet:#A78BFA;--violet-soft:#2A2146;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);--shadow-lg:0 24px 60px rgba(0,0,0,.5);color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0E1117;--bg-2:#151922;--surface:#181D27;--ink:#F3F4F6;--ink-2:#C9CED8;--muted:#8D95A5;
  --line:#262C38;--line-2:#323A48;--brand:#6A84FF;--brand-ink:#9DB0FF;--brand-soft:#1C2447;
  --accent:#FFCF5C;--accent-ink:#FFD980;--accent-soft:#3A2F12;--mint:#2ECF98;--mint-ink:#6BE3B9;--mint-soft:#10352A;
  --coral:#FF6B70;--coral-ink:#FF9A9D;--coral-soft:#3E1C1E;--violet:#A78BFA;--violet-soft:#2A2146;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);--shadow-lg:0 24px 60px rgba(0,0,0,.5);color-scheme:dark;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.55;font-size:16px;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:none}
input,select,textarea{font:inherit;color:var(--ink)}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:8px}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.center{text-align:center}
sub,sup{font-size:.72em}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em}
.display{font-family:var(--display);font-weight:600;letter-spacing:-.025em}

.btn{--c:var(--brand);--c2:var(--brand-ink);--t:#fff;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--c);color:var(--t);font-weight:700;font-size:15px;
  padding:12px 20px;border-radius:14px;box-shadow:0 4px 0 var(--c2);
  transform:translateY(0);transition:transform .08s,box-shadow .08s,filter .15s;white-space:nowrap;text-decoration:none!important;min-height:46px}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--c2)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn.lg{font-size:17px;padding:15px 26px;border-radius:16px}
.btn.sm{font-size:14px;padding:8px 14px;min-height:38px;border-radius:12px;box-shadow:0 3px 0 var(--c2)}
.btn.block{width:100%}
.btn.ink{--c:var(--ink);--c2:#000;--t:var(--bg)}
.btn.ghost{--c:var(--surface);--c2:var(--line-2);--t:var(--ink);border:2px solid var(--line-2)}
.btn.mint{--c:var(--mint);--c2:var(--mint-ink)}
.btn.coral{--c:var(--coral);--c2:var(--coral-ink)}
.btn.gold{--c:var(--accent);--c2:#D19A00;--t:#2A1D00}
.btn.violet{--c:var(--violet);--c2:#6D3FE0}
:root[data-theme="dark"] .btn.ink{--c2:#9aa3b5}
.btn small{display:block;font-weight:600;font-size:11px;opacity:.85}
.btn.stack{flex-direction:column;gap:0;line-height:1.2}
.btn.multiline{white-space:normal;text-align:center;line-height:1.25}
@media (max-width:400px){.btn.lg.multiline{padding:14px 16px}}
.link{color:var(--brand);font-weight:700}
.kbd{display:inline-block;font-size:11px;font-weight:700;padding:1px 6px;border-radius:6px;background:rgba(255,255,255,.22);margin-left:4px}
.btn.ghost .kbd{background:var(--bg-2)}

.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--surface);border:1.5px solid var(--line);font-weight:600;font-size:14px}
button.chip{color:inherit;font-family:inherit;cursor:pointer}
.chip[aria-pressed="true"]{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-ink)}
.card.ask{position:relative}
.card.ask>.x{position:absolute;right:14px;top:14px}
.card.ask>.x+*{padding-right:48px}
.pill{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--bg-2);color:var(--ink-2)}
.pill.brand{background:var(--brand-soft);color:var(--brand-ink)}
.pill.mint{background:var(--mint-soft);color:var(--mint-ink)}
.pill.gold{background:var(--accent-soft);color:var(--accent-ink)}
.pill.coral{background:var(--coral-soft);color:var(--coral-ink)}
.pill.violet{background:var(--violet-soft);color:var(--violet)}
.card{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);padding:22px}
.card.pad-lg{padding:30px}
.eyebrow{font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.tip{background:var(--brand-soft);border-radius:var(--radius-sm);padding:14px 16px;font-size:15px;color:var(--ink-2)}
.tip.gold{background:var(--accent-soft)}
.tip.mint{background:var(--mint-soft)}
.tip.coral{background:var(--coral-soft)}
.tip b{color:var(--ink)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row[hidden]{display:none}
.bar{height:8px;border-radius:99px;background:var(--bg-2);overflow:hidden}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--mint),#4AD6A5);border-radius:99px;transition:width .4s}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label,.field legend{font-weight:700;font-size:14px}
fieldset.field{border:0;min-width:0}
.field legend{margin-bottom:6px}
.input,select.input,textarea.input{width:100%;padding:13px 14px;border-radius:12px;border:2px solid var(--line-2);background:var(--surface);transition:border-color .15s}
.input:focus{border-color:var(--brand);outline:none}
textarea.input{min-height:220px;resize:vertical;line-height:1.5}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:12px;font-weight:600;opacity:0;pointer-events:none;transition:.25s;z-index:200;max-width:calc(100% - 32px)}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

.topnav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.topnav.scrolled{border-bottom-color:var(--line)}
.topnav .wrap{display:flex;align-items:center;gap:22px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em;white-space:nowrap}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;flex:none}
.topnav .links{display:flex;gap:22px;margin-left:12px}
.topnav .links a{color:var(--ink-2);font-weight:600;font-size:15px}
.topnav .right{margin-left:auto;display:flex;gap:10px;align-items:center}
.lang{display:inline-flex;border:1.5px solid var(--line-2);border-radius:10px;overflow:hidden;font-size:13px;font-weight:800}
.lang button{padding:6px 9px;color:var(--muted)}
.lang button.on{background:var(--ink);color:var(--bg)}
.iconbtn{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid var(--line-2);background:var(--surface)}
.iconbtn svg{width:20px;height:20px}
@media (max-width:900px){.topnav .links{display:none}}
@media (max-width:640px){.topnav .hide-sm{display:none}.topnav .wrap{gap:12px}}
@media (max-width:420px){.logo span span{display:none}.logo{font-size:0;gap:0}.logo .logo-mark{font-size:16px}}

.hero{padding:56px 0 40px;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(40px,6vw,68px);margin:14px 0 18px}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,var(--accent) 62%,var(--accent) 92%,transparent 92%)}
.hero p.lead{font-size:clamp(17px,2vw,20px);color:var(--ink-2);max-width:560px;margin-bottom:26px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero .proof{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;color:var(--muted);font-size:14px;font-weight:600}
.hero .proof span{display:flex;align-items:center;gap:6px}
.hero-art{position:relative;min-height:440px}
.float-card{position:absolute;background:var(--surface);border:1.5px solid var(--line);border-radius:22px;box-shadow:var(--shadow-lg);padding:20px}
.fc-main{left:4%;right:6%;top:30px;z-index:2}
.fc-main .q{font-size:20px;font-weight:800;margin:10px 0 14px;letter-spacing:-.01em}
.fc-grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.fc-grades span{border-radius:10px;padding:8px 4px;text-align:center;font-size:12px;font-weight:800;color:#fff}
.fc-streak{right:0;top:-6px;z-index:3;padding:12px 16px;display:flex;align-items:center;gap:10px;font-weight:800;animation:bob 5s ease-in-out infinite}
.fc-curve{left:0;bottom:0;width:54%;z-index:3;padding:16px;animation:bob 6s ease-in-out infinite reverse}
.fc-sim{right:0;bottom:24px;z-index:3;width:40%;padding:16px;animation:bob 7s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-8px)}}
@media (prefers-reduced-motion:reduce){.fc-streak,.fc-curve,.fc-sim{animation:none}}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;z-index:-1}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}.hero-art{min-height:420px}}
@media (max-width:520px){.hero-art{min-height:470px}.fc-curve{width:78%}.fc-sim{display:none}}

.schools{padding:18px 0 40px}
.schools .row{justify-content:center;gap:10px}
.schools .chip{padding:10px 16px;font-size:15px}
.schools .chip b{color:var(--brand)}
.section{padding:84px 0}
.section.alt{background:var(--bg-2)}
.section h2{font-size:clamp(30px,4vw,46px);margin:10px 0 14px}
.section .sub{font-size:18px;color:var(--ink-2);max-width:640px}
.section-head{margin-bottom:40px}
.section-head.center .sub{margin:0 auto}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.step .num{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px}
.step h3{font-size:19px;margin-bottom:6px}
.step p{color:var(--ink-2);font-size:15px}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

.science{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.curve-card{position:sticky;top:90px}
.curve-card svg text{font-family:var(--font)}
.principles{display:grid;gap:12px}
.principle{display:grid;grid-template-columns:48px 1fr;gap:14px;background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);padding:18px}
.principle .ic{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px}
.principle h3{font-size:17px;margin-bottom:4px}
.principle p{font-size:15px;color:var(--ink-2)}
.principle .cite{display:block;font-size:12.5px;color:var(--muted);margin-top:6px}
.effect{display:inline-block;font-weight:800;color:var(--mint-ink);background:var(--mint-soft);border-radius:6px;padding:0 6px;font-size:13px}
@media (max-width:900px){.science{grid-template-columns:1fr}.curve-card{position:static}}

.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);padding:24px}
.feature .ic{font-size:26px;margin-bottom:12px}
.feature h3{font-size:18px;margin-bottom:6px}
.feature p{color:var(--ink-2);font-size:15px}
@media (max-width:900px){.features{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.features{grid-template-columns:1fr}}

.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.plan{background:var(--surface);border:2px solid var(--line);border-radius:24px;padding:28px;display:flex;flex-direction:column;position:relative}
.plan.hi{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft),var(--shadow-lg)}
.plan .badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--brand);color:#fff;font-weight:800;font-size:12.5px;padding:5px 14px;border-radius:99px;white-space:nowrap}
.plan h3{font-size:20px}
.plan .desc{color:var(--muted);font-size:14.5px;margin:4px 0 16px;min-height:44px}
.plan .price{font-size:44px;font-weight:800;letter-spacing:-.03em;line-height:1}
.plan .price small{font-size:16px;font-weight:600;color:var(--muted);letter-spacing:0}
.plan .per{font-size:13.5px;color:var(--muted);margin:8px 0 18px;min-height:20px}
.plan ul{list-style:none;display:grid;gap:10px;margin:0 0 24px;font-size:15px}
.plan li{display:grid;grid-template-columns:22px 1fr;gap:8px;align-items:start}
.plan li::before{content:"";width:20px;height:20px;border-radius:50%;background:var(--mint-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%230B7A55' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat;margin-top:2px}
.plan li.no{color:var(--muted)}
.plan li.no::before{background:var(--bg-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M7 10h6' stroke='%239CA3AF' stroke-width='2.4' stroke-linecap='round'/%3E%3C/svg%3E") center/100% no-repeat}
.plan .btn{margin-top:auto}
.guarantee{display:flex;gap:10px;justify-content:center;align-items:center;margin-top:26px;color:var(--ink-2);font-weight:600;font-size:15px;flex-wrap:wrap;text-align:center}
@media (max-width:900px){.pricing{grid-template-columns:1fr;max-width:460px;margin:0 auto}}

.faq{max-width:780px;margin:0 auto;display:grid;gap:10px}
.faq details{background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:18px 20px}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px;font-size:16.5px}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--muted);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:10px;color:var(--ink-2)}
.cta-band{background:var(--ink);color:var(--bg);border-radius:28px;padding:56px 32px;text-align:center;position:relative;overflow:hidden}
.cta-band h2{font-size:clamp(28px,4vw,44px);margin-bottom:12px}
.cta-band p{opacity:.8;margin-bottom:24px;font-size:18px}
.cta-band .btn.gold{box-shadow:0 4px 0 #B38400}
footer.site{padding:40px 0 60px;color:var(--muted);font-size:14px}
footer.site .wrap{display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;align-items:center}
footer.site nav{display:flex;gap:18px;flex-wrap:wrap}
footer.site a{color:var(--ink-2)}

.auth{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}
.auth-side{background:var(--brand);color:#fff;padding:48px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth-side .logo{color:#fff}
.auth-side h2{font-size:40px;max-width:420px;margin-bottom:14px}
.auth-side p{opacity:.85;max-width:420px;font-size:17px}
.auth-side .quote{background:rgba(255,255,255,.12);border-radius:18px;padding:18px;max-width:420px;font-size:15px}
.auth-main{display:flex;align-items:center;justify-content:center;padding:32px 20px}
.auth-box{width:100%;max-width:400px}
.auth-box h1{font-size:30px;margin-bottom:6px}
.auth-box .sub{color:var(--muted);margin-bottom:24px}
.oauth{display:grid;gap:10px;margin-bottom:18px}
.oauth .btn{justify-content:center}
.oauth svg{width:20px;height:20px}
.divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;font-weight:700;margin:18px 0;text-transform:uppercase;letter-spacing:.06em}
.divider::before,.divider::after{content:"";flex:1;height:1.5px;background:var(--line)}
.legal{font-size:12.5px;color:var(--muted);margin-top:16px;text-align:center}
.demo-banner{background:var(--accent-soft);color:var(--accent-ink);border-radius:12px;padding:10px 12px;font-size:13px;font-weight:600;margin-bottom:18px}
.notice{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:8px 16px;font-size:14px;font-weight:600;text-align:center;background:var(--accent-soft);color:var(--accent-ink)}
.notice.coral{background:var(--coral-soft);color:var(--coral-ink)}
.notice.brand{background:var(--brand-soft);color:var(--brand-ink)}
.notice a{color:inherit;text-decoration:underline;font-weight:800}
.notice-x{background:none;border:0;color:inherit;font:inherit;cursor:pointer;padding:0 4px}
.gcode{display:flex;flex-direction:column;align-items:center;gap:8px;margin:18px 0}
.gcode code{font-size:22px;font-weight:800;letter-spacing:.04em;user-select:all}
@media (max-width:860px){.auth{grid-template-columns:1fr}.auth-side{display:none}}

.ob{min-height:100vh;display:flex;flex-direction:column}
.ob-top{display:flex;align-items:center;gap:16px;padding:18px 20px;max-width:760px;width:100%;margin:0 auto}
.ob-top .bar{flex:1;height:12px}
.ob-body{flex:1;max-width:640px;width:100%;margin:0 auto;padding:24px 20px 120px}
.ob-body h1{font-size:clamp(26px,4vw,34px);margin-bottom:8px}
.ob-body .sub{color:var(--muted);margin-bottom:24px;font-size:17px}
.opts{display:grid;gap:10px}
.opts.cols{grid-template-columns:1fr 1fr}
@media (max-width:520px){.opts.cols{grid-template-columns:1fr}}
.opt{display:flex;align-items:center;gap:14px;text-align:left;width:100%;background:var(--surface);border:2px solid var(--line-2);border-radius:16px;padding:16px;box-shadow:0 3px 0 var(--line-2);transition:transform .08s,border-color .15s}
.opt:hover{border-color:var(--brand)}
.opt:active{transform:translateY(2px);box-shadow:0 1px 0 var(--line-2)}
.opt.on{border-color:var(--brand);background:var(--brand-soft);box-shadow:0 3px 0 var(--brand)}
.opt .em{font-size:26px;width:44px;height:44px;border-radius:12px;background:var(--bg-2);display:flex;align-items:center;justify-content:center;flex:none}
.opt .t{font-weight:700}
.opt .d{font-size:13.5px;color:var(--muted)}
.opt .pill{margin-left:auto}
.ob-foot{position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1.5px solid var(--line);padding:16px 20px}
.ob-foot .in{max-width:640px;margin:0 auto;display:flex;gap:12px;justify-content:space-between}

.shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.side{border-right:1.5px solid var(--line);padding:20px 14px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:6px;background:var(--bg)}
.side .logo{padding:4px 8px 18px}
.navitem{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;font-weight:700;color:var(--ink-2);font-size:15px;width:100%;text-align:left;border:2px solid transparent}
.navitem:hover{background:var(--bg-2);text-decoration:none}
.navitem.on{background:var(--brand-soft);color:var(--brand-ink);border-color:color-mix(in srgb,var(--brand) 30%,transparent)}
.navitem .ni{width:26px;text-align:center;font-size:19px}
.navitem .count{margin-left:auto;font-size:12px;background:var(--coral);color:#fff;border-radius:99px;padding:1px 8px}
.side .spacer{flex:1}
.upsell{background:linear-gradient(145deg,var(--brand),#6A3DF5);color:#fff;border-radius:18px;padding:16px;font-size:14px}
.upsell b{display:block;font-size:16px;margin-bottom:4px}
.upsell .btn{margin-top:10px;width:100%}
.main{min-width:0}
.appbar{display:flex;align-items:center;gap:12px;padding:14px 28px;border-bottom:1.5px solid var(--line);position:sticky;top:0;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(10px);z-index:40}
.appbar .packsel{display:flex;align-items:center;gap:10px;font-weight:700;min-width:0;border-radius:12px;padding:6px 10px;margin-left:-10px}
.appbar .packsel:hover{background:var(--bg-2)}
.appbar .packsel .tt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:36vw}
.appbar .packsel .school{font-size:12px;font-weight:800;padding:4px 8px;border-radius:8px;background:var(--ink);color:var(--bg)}
.appbar .stats{margin-left:auto;display:flex;gap:8px;align-items:center}
.stat-chip{display:inline-flex;align-items:center;gap:6px;font-weight:800;font-size:14px;padding:7px 11px;border-radius:12px;background:var(--surface);border:1.5px solid var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#2A1D00;font-weight:800;display:flex;align-items:center;justify-content:center;position:relative}
.avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.menu{position:absolute;right:0;top:48px;background:var(--surface);border:1.5px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);padding:8px;min-width:240px;z-index:60;text-align:left}
.menu .who{padding:10px 12px;border-bottom:1.5px solid var(--line);margin-bottom:6px}
.menu .who b{display:block}
.menu .who span{font-size:13px;color:var(--muted);word-break:break-all}
.menu button,.menu a{display:flex;width:100%;padding:10px 12px;border-radius:10px;font-weight:600;font-size:14.5px;color:var(--ink);gap:10px}
.menu button:hover,.menu a:hover{background:var(--bg-2);text-decoration:none}
.content{max-width:880px;margin:0 auto;padding:28px 28px 120px}
.content h1.pg{font-size:30px;margin-bottom:6px}
.content .pgsub{color:var(--muted);margin-bottom:22px}
.tabbar{display:none}
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .side{display:none}
  .appbar{padding:12px 16px}
  .appbar .stat-chip.hide-m{display:none}
  .content{padding:20px 16px 150px}
  .tabbar{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1.5px solid var(--line);z-index:45;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
  .tabbar button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;font-weight:700;color:var(--muted);padding:6px 2px;border-radius:10px}
  .tabbar button .ni{font-size:21px}
  .tabbar button.on{color:var(--brand)}
}

.plan-card{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;margin-bottom:18px}
.ring{width:84px;height:84px;position:relative}
.ring svg{transform:rotate(-90deg)}
.ring b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800}
.todo{display:grid;gap:10px;margin-bottom:22px}
.todo-item{display:flex;gap:14px;align-items:center;background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:14px 16px}
.todo-item .em{font-size:22px;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex:none}
.todo-item .t{font-weight:700}
.todo-item .d{font-size:13.5px;color:var(--muted)}
.todo-item .btn{margin-left:auto}
.todo-item.done{opacity:.6}
.study-card{background:var(--surface);border:2px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}
.study-card .meta{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.study-card .qtext{font-size:clamp(20px,2.6vw,26px);font-weight:800;letter-spacing:-.015em;line-height:1.3;margin-bottom:18px}
.answer{background:var(--mint-soft);border-radius:16px;padding:16px 18px;font-size:17px;margin-bottom:12px;border-left:5px solid var(--mint)}
details.expl{background:var(--bg-2);border-radius:14px;padding:12px 16px;margin-bottom:16px}
details.expl summary{cursor:pointer;font-weight:700;font-size:14.5px}
details.expl div{margin-top:8px;color:var(--ink-2);font-size:15px}
.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.grades .btn{padding:10px 6px}
.predict{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.predict .opt{justify-content:center;flex-direction:column;gap:2px;text-align:center;padding:12px 8px}
.predict .opt .em{background:none;width:auto;height:auto;font-size:24px}
@media (max-width:560px){.grades{grid-template-columns:1fr 1fr}.predict .opt .t{font-size:13.5px}}
.progress-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.progress-top .bar{flex:1;height:12px}
.qgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.qitem{background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:16px;text-align:left;display:flex;flex-direction:column;gap:8px;transition:border-color .15s,transform .1s;width:100%}
.qitem:hover{border-color:var(--brand);transform:translateY(-1px)}
.qitem .n{font-size:12px;font-weight:800;color:var(--muted)}
.qitem .t{font-weight:700;line-height:1.3}
.qitem.locked{opacity:.75}
.qitem.locked .t::after{content:" 🔒"}
.sec-h{display:flex;align-items:center;gap:10px;margin:26px 0 12px}
.sec-h h2{font-size:20px}
.grp-h{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline;margin:14px 0 2px;padding-bottom:6px;border-bottom:1.5px dashed var(--line)}
.grp-h b{font-size:16px}
.grp-h .muted{font-size:12.5px}
.official .gnote{margin:8px 0 0;font-size:13px;opacity:.85}
.official{background:var(--accent-soft);border-radius:14px;padding:14px 16px;font-size:14.5px;margin:12px 0;color:var(--ink-2)}
.official b{display:block;color:var(--accent-ink);font-size:12px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.checklist{display:grid;gap:8px;margin:12px 0}
.chk{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:2px solid var(--line);border-radius:14px;cursor:pointer;background:var(--surface)}
.chk:has(input:checked){border-color:var(--mint);background:var(--mint-soft)}
.chk input{width:20px;height:20px;accent-color:var(--mint);margin-top:2px;flex:none}
ul.bul{padding-left:20px;display:grid;gap:4px}
.timer{font-size:clamp(56px,10vw,84px);font-weight:800;text-align:center;letter-spacing:-.04em;font-variant-numeric:tabular-nums;margin:10px 0}
.timer.warn{color:var(--coral)}
.statgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
.statbox{background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:16px}
.statbox b{display:block;font-size:28px;font-weight:800;letter-spacing:-.02em}
.statbox span{font-size:13px;color:var(--muted);font-weight:600}
@media (max-width:700px){.statgrid{grid-template-columns:1fr 1fr}}
.heat{display:grid;grid-template-columns:repeat(14,1fr);gap:6px;align-items:end;height:120px}
.heat div{background:var(--brand);border-radius:6px 6px 3px 3px;position:relative;min-height:4px}
.heat div.z{background:var(--line)}
.heat-l{display:grid;grid-template-columns:repeat(14,1fr);gap:6px;font-size:11px;color:var(--muted);text-align:center;margin-top:6px}
.statgrid.two{grid-template-columns:1fr 1fr}
.heat.week,.heat-l.week{grid-template-columns:repeat(7,1fr)}
.heat.week{height:40px}
.heat.week div{display:flex;align-items:center;justify-content:center;color:var(--surface);font-weight:800;font-size:15px}
.heat.week div.ok,.heat.week div.part{background:var(--mint)}
.heat.week div.res{background:var(--mint-soft);border:1.5px dashed var(--mint)}
.heat.week div.fut{background:none;border-bottom:2px dotted var(--line);border-radius:0}
.heat.week div.off{background:var(--bg-2)}
.heat.week div.now{outline:2px solid var(--ink-2);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.set-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;border-bottom:1.5px solid var(--line)}
.set-row:last-child{border-bottom:none}
.set-row .d{font-size:13.5px;color:var(--muted)}
.set-row.wrap{flex-wrap:wrap}
.set-row.wrap>div:first-child{flex:1 1 220px;min-width:0}
.wdays{gap:6px;flex-wrap:nowrap}
.wdays .chip{min-width:40px;padding:6px 0;justify-content:center;font-size:13.5px}
.wdays .chip:disabled{cursor:default}
.stack{display:grid;gap:16px}

.modal-bg{position:fixed;inset:0;background:rgba(10,12,18,.55);z-index:100;display:flex;align-items:center;justify-content:center;padding:16px;animation:fade .15s}
.modal{background:var(--bg);border-radius:26px;max-width:880px;width:100%;max-height:92vh;overflow:auto;padding:30px;position:relative;box-shadow:var(--shadow-lg)}
.modal.sm{max-width:460px}
.modal .x{position:absolute;right:14px;top:14px}
@keyframes fade{from{opacity:0}}
.lock-hero{text-align:center;margin-bottom:22px}
.lock-hero .em{font-size:44px}

.qtabs{display:flex;gap:6px;border-bottom:2px solid var(--line);margin:22px 0 18px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none}
.qtabs::-webkit-scrollbar{display:none}
.qtabs button{padding:10px 14px;font-weight:700;font-size:14.5px;color:var(--muted);border-bottom:3px solid transparent;margin-bottom:-2px;white-space:nowrap}
.qtabs button.on{color:var(--brand);border-bottom-color:var(--brand)}
.qtabs .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--coral);margin-left:6px;vertical-align:2px}
.qcard{margin-top:12px}
.qtitle{font-size:28px;margin:10px 0}
.study-card .qtitle{font-size:26px}
.qacts{margin-top:14px}
.qnum,.lbl-s,.menu .m-fb{display:none}
.official .gnote:first-child{margin-top:0}
.menu .m-fb svg{width:18px;height:18px;flex:none;margin:2px 0}
.ch{scroll-margin-top:80px}
.ch-sum{background:var(--bg-2);border-radius:14px;padding:14px 16px 4px;margin-bottom:18px}
.ch-sum-h{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:6px;font-size:13px;color:var(--muted)}
.ch-sum-h b{color:var(--ink-2);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.ch-sum .prose{padding-top:0}
.ch-done{margin-bottom:10px;color:var(--ink-2)}
.ch-go{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-bottom:12px}
.ch-go .muted{font-size:14px}
.ch-list{list-style:none}
.ch-list a{display:grid;grid-template-columns:26px 1fr auto;gap:12px;align-items:center;padding:11px 0;border-bottom:1.5px dashed var(--line);color:var(--ink)}
.ch-list li:last-child a{border-bottom:none}
.ch-list a:hover{text-decoration:none;color:var(--brand)}
.ch-list i{font-style:normal;width:26px;height:26px;border-radius:8px;background:var(--bg-2);color:var(--ink-2);font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}
.ch-list i.on{background:var(--mint-soft);color:var(--mint-ink)}
.ch-list .t{font-weight:700;line-height:1.3;min-width:0;overflow-wrap:anywhere}
.ch-list .m{font-size:13px;color:var(--muted);white-space:nowrap}
.ch-bar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 14px;font-size:14px}
.ch-end{margin-top:22px;color:var(--ink-2)}
.ch-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}
.ch-nav .btn{width:100%;padding-left:10px;padding-right:10px;white-space:normal;text-align:center}
.prose{padding-top:18px;scroll-margin-top:80px}
.prose h2{font-size:20px;margin-bottom:10px;letter-spacing:-.01em}
.prose p{margin-bottom:12px;font-size:16.5px;line-height:1.7;color:var(--ink)}
.prose ul{padding-left:22px;margin-bottom:12px;display:grid;gap:5px;font-size:16px;line-height:1.6}
.prose b{color:var(--ink);font-weight:800}
.fig{margin:10px 0 18px}
.fig-defs{position:absolute;width:0;height:0;overflow:hidden}
.fig svg{display:block;width:100%;height:auto;font-size:13px;font-family:inherit}
.fig svg text{fill:var(--ink)}
.fig .tx{fill:var(--ink)}
.fig .tx-s{font-size:11px}
.fig .tx-mu{fill:var(--muted)}
.fig .bx{fill:var(--surface);stroke:var(--ink);stroke-width:1.5}
.fig .ln,.fig .ac,.fig .ac2,.fig .mu,.fig .grid,.fig .ax,.fig .mark{fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.fig .ln{stroke:var(--ink)}
.fig .ac{stroke:var(--brand)}
.fig .ac2{stroke:var(--coral)}
.fig .mu{stroke:var(--muted)}
.fig .fl{fill:var(--brand-soft)}
.fig .grid{stroke:var(--line);stroke-width:1}
.fig .ax{stroke:var(--ink-2);stroke-width:1}
.fig .mark{stroke:var(--ink-2);stroke-dasharray:4 4;stroke-width:1}
.fig :is(rect,circle,ellipse,polygon).ac{fill:var(--brand-soft);stroke:var(--brand)}
.fig :is(rect,circle,ellipse,polygon).ac2{fill:var(--coral-soft);stroke:var(--coral)}
.fig .fig-scroll{overflow-x:auto}
.fig .fig-scroll svg{margin:0 auto}
.fig figcaption{font-size:13.5px;line-height:1.45;color:var(--muted);margin-top:6px}
.fig .s0{stroke:var(--brand);fill:var(--brand)}.fig .s1{stroke:var(--coral);fill:var(--coral)}.fig .s2{stroke:var(--mint-ink);fill:var(--mint-ink)}.fig .s3{stroke:var(--violet);fill:var(--violet)}.fig .s4{stroke:var(--accent-ink);fill:var(--accent-ink)}.fig .s5{stroke:var(--ink-2);fill:var(--ink-2)}
.fig path.line,.fig path.dashed,.fig path.step{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.fig path.dashed{stroke-dasharray:6 5}
.fig path.area{fill-opacity:.18;stroke-width:2;stroke-linejoin:round}
.fig g.stem line{stroke-width:1.5}
.fig g.stem circle,.fig g.dots circle{stroke:none}
.fig-plot svg{max-width:640px;margin:0 auto}
.fig-legend{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--ink-2);margin-top:6px;justify-content:center}
.fig-legend span{display:inline-flex;align-items:center;gap:6px}
.fig-legend span.off{opacity:.45}
.fig-legend i{width:18px;height:0;border-top:3px solid;border-color:currentColor;color:var(--brand)}
.fig-legend i.s1{color:var(--coral)}.fig-legend i.s2{color:var(--mint-ink)}.fig-legend i.s3{color:var(--violet)}.fig-legend i.s4{color:var(--accent-ink)}.fig-legend i.s5{color:var(--ink-2)}
.fig-legend i.dashed{border-top-style:dashed}.fig-legend i.stem,.fig-legend i.dots{width:8px;height:8px;border:0;border-radius:50%;background:currentColor}
.fig-ctrls{display:grid;gap:8px;margin-top:12px;padding:12px 14px;background:var(--bg-2);border-radius:12px}
.fig-ctrls label{display:grid;grid-template-columns:minmax(60px,auto) 1fr minmax(64px,auto);align-items:center;gap:12px;font-size:14px}
.fig-ctrls .fig-cl{font-weight:700;color:var(--ink-2)}
.fig-ctrls output{text-align:right;font-variant-numeric:tabular-nums;font-weight:700}
.fig-ctrls input[type=range]{width:100%;accent-color:var(--brand);margin:0}
.fig-read{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:14px;margin-top:8px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.fig-err{font-size:13px;color:var(--coral-ink);background:var(--coral-soft);padding:8px 12px;border-radius:10px}
.fig img{max-width:100%;height:auto;border-radius:12px;display:block}
details.expl .fig div{margin-top:0}
.tbl{overflow-x:auto;margin:6px 0 14px}
.tbl table{border-collapse:collapse;width:100%;font-size:14.5px}
.tbl th,.tbl td{border:1.5px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.tbl th{background:var(--bg-2);font-weight:800}
.outline{display:grid;gap:8px}
.outline span{display:flex;gap:10px;align-items:flex-start;background:var(--bg-2);border-radius:12px;padding:10px 12px;font-weight:600}
.outline i{font-style:normal;flex:none;width:24px;height:24px;border-radius:8px;background:var(--brand);color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center}
.linkq{display:flex;flex-direction:column;gap:2px;text-align:left;padding:12px 14px;border:1.5px solid var(--line);border-radius:14px;background:var(--surface);width:100%}
.linkq:hover{border-color:var(--brand)}
.linkq span{font-size:14px;color:var(--muted)}
.consent{position:fixed;right:20px;bottom:20px;z-index:60;width:min(380px,calc(100% - 40px));box-shadow:var(--shadow-lg);animation:consent-in .35s ease-out}
.consent .eyebrow{display:block;margin-bottom:8px}
.consent-q{font-size:19px;line-height:1.3;margin-bottom:12px}
.consent-a{font-size:15px;margin-bottom:14px}
.consent-btns{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.consent-btns .btn{width:100%;padding-left:10px;padding-right:10px;white-space:normal}
.consent-note{font-size:13px;color:var(--muted);margin-top:10px}
@keyframes consent-in{from{opacity:0;transform:translateY(16px)}}
@media (max-width:640px){.consent{left:0;right:0;bottom:0;width:auto;border-radius:var(--radius) var(--radius) 0 0;border-bottom:none;padding:18px 16px calc(18px + env(safe-area-inset-bottom))}}
@media (prefers-reduced-motion:reduce){.consent{animation:none}}

.legal{text-align:left}
.legal h2{font-size:20px;margin:28px 0 10px}
.legal h2:first-of-type{margin-top:18px}
.legal p,.legal ul{margin:0 0 12px;line-height:1.6}
.legal ul{padding-left:22px}
.legal li{margin-bottom:6px}

.intro-offer{display:flex;justify-content:space-between;align-items:center;gap:12px 16px;flex-wrap:wrap;margin-bottom:16px}
.how-link{text-align:center;margin-top:28px;font-size:15px}
.kbd-hint{font-size:13.5px;margin-top:12px}
@media (hover:none),(pointer:coarse){.kbd-hint{display:none}}
.sec-h{font-size:19px;margin-bottom:2px}
.card.danger{border-color:color-mix(in srgb,var(--coral) 45%,var(--line));margin-top:18px}
.card.danger .sec-h{color:var(--coral-ink)}
details.adv,details.buys{margin-top:14px}
details.adv .set-row:last-child,details.buys .set-row:last-child{border-bottom:none;padding-bottom:4px}
.redeem{padding:12px 0 16px;border-bottom:1.5px solid var(--line)}
.sci h3{margin-bottom:8px;line-height:1.35;font-size:18px}
.sci-t{font-weight:700;color:var(--ink-2);font-size:14px;margin-bottom:4px}
.sci-c{font-size:13px;margin-top:6px}
.study-card.intro .answer p{margin:0}

.fbb{position:fixed;right:20px;bottom:20px;z-index:55;display:flex;flex-direction:column;align-items:flex-end;gap:12px;pointer-events:none}
.fbb[hidden],.fbb-panel[hidden]{display:none}
.fbb>*{pointer-events:auto}
.fbb-btn{width:52px;height:52px;border-radius:50%;background:var(--surface);color:var(--ink-2);border:1.5px solid var(--line-2);box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;transition:border-color .15s,color .15s}
.fbb-btn svg{width:24px;height:24px}
.fbb-btn:hover,.fbb-btn[aria-expanded="true"]{border-color:var(--brand);color:var(--brand)}
.fbb-btn:focus-visible{border-radius:50%}
.fbb-panel{width:min(380px,calc(100vw - 32px));max-height:min(640px,calc(100vh - 110px));overflow:auto;box-shadow:var(--shadow-lg);padding:18px}
.fbb-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.fbb-head h2{flex:1;font-size:18px;line-height:1.3}
.fbb-head .iconbtn{width:36px;height:36px;flex:none}
.fbb .opt{padding:12px}
.fbb .opt .em{width:38px;height:38px;font-size:20px}
.fbb textarea.input{min-height:110px;resize:vertical}
.fbb-note{font-size:13.5px;margin-top:12px}
.fbb-small{font-size:13px}
.fbb-chk{margin-bottom:10px;font-size:14.5px}
.fbb-what{margin-bottom:14px}
.fbb-what pre{font-size:12px;white-space:pre-wrap;word-break:break-word;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px;margin-top:8px;max-height:200px;overflow:auto;color:var(--ink-2)}
.fbb-acct{margin-bottom:14px}
.fbb-hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
body:has(.consent) .fbb,body:has(.modal-bg) .fbb{display:none}
@media (max-width:640px){.fbb{right:16px;bottom:calc(16px + env(safe-area-inset-bottom))}.fbb-panel{max-height:calc(100vh - 170px)}}
@media (max-width:900px){body:has(.tabbar) .fbb{right:16px;bottom:calc(78px + env(safe-area-inset-bottom))}body:has(.tabbar) .fbb-panel{max-height:calc(100vh - 230px)}}

@media (max-width:640px){
  .appbar{padding:max(6px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 6px max(16px,env(safe-area-inset-left));transition:transform .2s ease}
  .appbar.up{transform:translateY(-100%)}
  .appbar.up:has(:focus-visible){transform:none}
  .content{padding:12px max(16px,env(safe-area-inset-right)) calc(72px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
  .content h1.pg{font-size:26px}
  .content .pgsub{margin-bottom:16px}
  .tabbar{padding:0 max(4px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(4px,env(safe-area-inset-left))}
  .tabbar button{height:55px;justify-content:center;gap:1px;padding:0 2px;line-height:1.2}
  .tabbar button .ni{font-size:20px;line-height:24px}
  body:has(.tabbar) .fbb{bottom:calc(68px + env(safe-area-inset-bottom))}
  body:has(.tabbar) .fbb-panel{max-height:calc(100vh - 200px)}
  .fbb[data-phone="hide"] .fbb-btn{display:none}
  .menu .m-fb{display:flex}
  .lbl-l{display:none}
  .lbl-s{display:inline}

  .card.pad-lg{padding:20px 18px}
  .content .card,.content .card.pad-lg{background:none;border:0;border-top:1px solid var(--line);border-radius:0;padding:16px 0 0;box-shadow:none}
  .content>.card:first-child,.content>.card.pad-lg:first-child,.content .card.pad-lg.qcard{border-top:0;padding-top:0}
  .content .card.danger{border-top-color:color-mix(in srgb,var(--coral) 45%,var(--line))}
  .content #upsellCard{border:0;padding:14px 16px;border-radius:var(--radius-sm)}
  .content .card.ask>.x{right:0;top:10px}
  .content .study-card{background:none;border:0;border-radius:0;padding:0;box-shadow:none}
  .content .study-card.flash,.content .study-card.intro{background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:16px}
  .study-card .meta{margin-bottom:10px}
  .answer{padding:12px 14px}
  details.expl{padding:10px 12px}
  .tip{padding:12px 14px}
  .official{padding:10px 12px;margin:10px 0}
  .todo{gap:0;margin-bottom:18px}
  .todo-item{background:none;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:12px 0}
  .statgrid{gap:8px}
  .statbox{background:var(--bg-2);border:0;border-radius:var(--radius-sm);padding:12px 14px}
  .sec-h{margin-top:22px}
  .qgrid{gap:0}
  .qitem{background:none;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:12px 0;gap:6px}
  .qitem:hover{transform:none;border-color:var(--line)}
  .qitem>.pill{align-self:flex-start}
  .linkq{background:none;border:0;border-top:1px solid var(--line);border-radius:0;padding:10px 0}
  .chk{padding:10px 12px}
  .set-row{padding:14px 0}
  .outline span{padding:8px 10px}

  .qtop{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px}
  .qnum{display:inline-flex}
  .qcard{margin-top:6px}
  .qcard>.pill:first-child{display:none}
  .qtitle,.study-card .qtitle{font-size:22px;line-height:1.2;margin:4px 0 8px}
  .qacts{flex-wrap:nowrap;gap:6px;margin-top:10px}
  .qacts .btn{flex:1 1 0;min-width:0;padding:8px 4px;font-size:13px;gap:4px}
  .qtabs{margin:10px 0 12px;gap:0}
  .qtabs button{padding:8px 10px;font-size:14px}
  .ch-sum{background:none;border-radius:0;padding:0 0 2px;border-bottom:1px solid var(--line);margin-bottom:14px}

  .section{padding:52px 0}
  .section-head{margin-bottom:24px}
  .plan{padding:22px 18px}
  .step,.feature{padding:18px}
  .cta-band{padding:36px 20px;border-radius:22px}
}
@media (max-width:640px) and (prefers-reduced-motion:reduce){.appbar{transition:none}}