/* B901, B936: the landing page (src/landing.ts). Look from study-app/styles.css and pages.css. No web fonts, no
   images but the share picture, no script. Readable from 320 px; every colour pair meets WCAG AA. */
:root{--bg:#fff;--soft:#f5f6f8;--soft-2:#eef0f4;--ink:#24272c;--ink-2:#53565a;--line:#dfe2e7;--line-strong:#868a91;
--brand:#1f4e86;--navy:#0a1023;--navy-2:#16203d;--on-navy-2:#c3c9d6;--focus:#ffbf47;
--write:#74561f;--write-bg:#f4ede1;--speak:#584a78;--speak-bg:#eeebf4;--read:#245d96;--read-bg:#e7eef7;--listen:#1f5e6b;--listen-bg:#e6f0f2;
--ok:#2f6a43;--ok-bg:#e6f1e9;--mark:#fbe7a6;
--serif:Georgia,'Times New Roman',serif;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--sans);-webkit-text-size-adjust:100%}
h1,h2,h3,p,ul,ol,figure{margin-top:0}
h1,h2{font-family:var(--serif);font-weight:400;letter-spacing:-.03em}
h2{font-size:clamp(28px,4vw,40px);line-height:1.18;margin-bottom:28px;max-width:22ch}
h3{font-size:19px;line-height:1.3;margin-bottom:8px}
a{color:var(--brand)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;color:var(--ink);padding:8px 14px;border-radius:6px;z-index:10}
.skip:focus{left:8px}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.eyebrow{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);font-weight:600;margin-bottom:10px}
.center{text-align:center;margin:36px 0 0}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 22px;border-radius:9px;background:var(--navy);color:#fff;border:1px solid var(--navy);text-decoration:none;font-size:16px;font-weight:600}
.btn:hover{background:var(--navy-2)}
.btn.small{min-height:40px;padding:6px 16px;font-size:15px}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.btn.ghost:hover{background:var(--soft)}
.btn.big{min-height:54px;padding:12px 28px;font-size:18px}
.hero .btn,.btn.light{background:#fff;color:var(--navy);border-color:#fff}
.hero .btn:hover,.btn.light:hover{background:#e9ecf2}

/* Top bar */
.top{background:var(--navy);color:#fff;border-bottom:1px solid #1f2a47}
.top-in{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:68px}
.brand{text-decoration:none;color:inherit;display:inline-flex;gap:10px;align-items:center;font-family:var(--serif);font-size:27px;letter-spacing:-1px}
.brand .accent{color:#8fb4e3;margin-left:-10px}
.brandmark{width:32px;height:32px;flex:none}.brandmark svg{display:block;width:100%;height:100%;border-radius:22%;box-shadow:0 0 0 1px #8fb4e3}
.top nav{display:flex;gap:24px;align-items:center;font-size:15px}
.top nav a:not(.btn){color:#e4e8f0;text-decoration:none}
.top nav a:not(.btn):hover{color:#fff;text-decoration:underline}
.top .btn.ghost{background:none;color:#fff;border-color:#8a93a8}
.top .btn.ghost:hover{background:#1b2541}

/* Hero */
.hero{background:var(--navy);color:#fff;padding:64px 0 88px;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero .eyebrow{color:var(--on-navy-2)}
.hero h1{font-size:clamp(38px,5.4vw,62px);line-height:1.06;margin-bottom:22px}
.hero h1 .soft{color:#b9cbea}
.lead{font-size:clamp(18px,1.6vw,20px);color:#dfe4ee;margin-bottom:30px;max-width:36em}
.cta{display:flex;gap:22px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.link-light{color:#fff;font-weight:600}
.fine{font-size:14px;color:var(--on-navy-2);margin:0}

/* Pictures of the app */
.shot{margin:0;background:#fff;color:var(--ink);border-radius:14px;border:1px solid var(--line);box-shadow:0 24px 60px -20px rgba(0,0,0,.45);overflow:hidden;font-size:15px}
.shot-test{transform:rotate(1deg)}
.shot-bar{display:flex;align-items:center;gap:12px;background:#24304f;color:#fff;padding:10px 14px;font-size:13px}
.shot-bar span:first-child{flex:1;font-weight:600}
.shot-bar .timer{background:#3a4669;padding:3px 9px;border-radius:5px}
.shot-bar .next{background:#fff;color:var(--navy);font-weight:700;padding:4px 14px;border-radius:5px;letter-spacing:.04em}
.shot-body{display:grid;grid-template-columns:1fr 1.1fr;gap:0}
.shot-q{padding:16px;border-right:1px solid var(--line);background:#fafbfc}
.shot-q p{color:var(--ink-2);font-size:14px;line-height:1.5;margin:6px 0 0}
.shot-a{padding:16px;font-size:14px;line-height:1.55}
.shot-a p{margin:0 0 8px}
.shot-a small{display:block;color:var(--ink-2);font-size:12px;border-top:1px solid var(--line);padding-top:8px;margin-top:10px}
.caret{display:inline-block;width:2px;height:1.05em;background:var(--ink);vertical-align:text-bottom;margin-left:1px}
.vh{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

/* B914: hero showcase of the four tests (src/landing.ts), CSS only. Scenes share one grid cell (no layout shift); each
   resting style is the last frame, so reduced motion shows stills. 24 s loop, 6 s a scene, --d = scene start. */
@property --wc{syntax:'<integer>';inherits:true;initial-value:21}
@property --sp{syntax:'<integer>';inherits:true;initial-value:27}
@property --rs{syntax:'<integer>';inherits:true;initial-value:56}
.showcase{margin:0;position:relative}
.sc-stage{display:grid}
.sc-scene{grid-area:1/1;display:flex;flex-direction:column;visibility:hidden;min-width:0}
.sc-scene .shot-body{flex:1}
.sc-l{visibility:visible}
.sc-l,.sc-tab-l{--d:-.48s}.sc-r,.sc-tab-r{--d:5.52s}.sc-w,.sc-tab-w{--d:11.52s}.sc-s,.sc-tab-s{--d:17.52s}
.sc-eye{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);font-weight:600;margin-bottom:2px}
.shot-a .sc-pos{display:block;font-size:12px;color:var(--ink-2);margin:0 0 8px;border:0;padding:0}
.sc-layers{display:grid}.sc-layers>*{grid-area:1/1;min-width:0}
.sc-wait,.sc-prep{visibility:hidden}
.sc-wait p,.sc-prep p,.sc-rec p{color:var(--ink-2);margin:4px 0 0}
.sc-player{display:flex;align-items:center;gap:10px;margin:14px 0 10px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff}
.sc-play{width:28px;height:28px;border-radius:50%;background:var(--listen);flex:none;position:relative}
.sc-play::after{content:"";position:absolute;left:11px;top:9px;border-left:9px solid #fff;border-top:5px solid transparent;border-bottom:5px solid transparent}
.sc-track{flex:1;height:6px;border-radius:3px;background:var(--listen-bg);overflow:hidden}
.sc-fill{display:block;height:100%;background:var(--listen);transform-origin:left;transform:scaleX(1)}
.shot-q .sc-note{font-size:13px}
.sc-opts{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.sc-opts li{border:1px solid var(--line);border-radius:8px;padding:6px 10px 6px 30px;position:relative;font-size:13px;line-height:1.35}
.sc-opts li::before{content:"";position:absolute;left:10px;top:calc(50% - 6px);width:12px;height:12px;border:1.5px solid var(--line-strong);border-radius:50%;box-sizing:border-box}
.sc-opts .sc-pick{border-color:var(--listen);background:var(--listen-bg)}
.sc-opts .sc-pick::before{border:4px solid var(--listen)}
.sc-gap{margin:0 0 14px;line-height:2}
.sc-sel{display:inline-grid;vertical-align:middle;position:relative;border:1px solid var(--line-strong);border-radius:6px;padding:0 26px 0 8px;line-height:1.7;font-size:13px;background:#fff}
.sc-sel::after{content:"";position:absolute;right:9px;top:50%;margin-top:-2px;border-top:5px solid var(--ink-2);border-left:4px solid transparent;border-right:4px solid transparent}
.sc-v0,.sc-v1{grid-area:1/1}
.sc-v0{color:var(--ink-2);visibility:hidden}
.sc-v1{font-weight:600;color:var(--read)}
.sc-list{position:absolute;left:-1px;top:100%;z-index:2;display:grid;min-width:130px;background:#fff;border:1px solid var(--line-strong);border-radius:6px;box-shadow:0 8px 20px -8px #0005;visibility:hidden}
.sc-list span{padding:1px 10px}.sc-list .sc-hi{background:var(--read-bg);color:var(--read);font-weight:600}
.sc-clock{display:block;font-family:var(--serif);font-size:34px;line-height:1.1;color:var(--navy)}
.sc-c1::before{counter-reset:sp var(--sp);content:"0:" counter(sp,decimal-leading-zero)}
.sc-c2::before{counter-reset:rs var(--rs);content:"0:" counter(rs,decimal-leading-zero)}
.sc-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#b3261e;margin-right:6px;vertical-align:0}
.sc-rec .sc-pos{color:#b3261e;font-weight:600}
.sc-meter{display:flex;align-items:center;gap:4px;height:30px;margin:8px 0 2px}
.sc-meter i{width:6px;height:100%;border-radius:3px;background:var(--speak);transform:scaleY(.35)}
.sc-meter i:nth-child(odd){transform:scaleY(.7)}.sc-meter i:nth-child(5){transform:none}
.sc-wc::before{counter-reset:wc var(--wc);content:counter(wc)}
/* Real radio buttons (hidden), labels drawn as tabs. */
.sc-tabs{border:0;margin:22px 0 0;padding:0;min-width:0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.sc-tabs label{cursor:pointer;font-size:14px;font-weight:600;padding:7px 14px;border-radius:20px;border:1px solid #5d6a8a;color:#e4e8f0;background:none;min-height:36px;display:inline-flex;align-items:center}
.sc-tabs label:hover{border-color:#c3c9d6}
.sc-tabs .sc-tab-l,.showcase .sc-tabs input:checked+label{background:#fff;color:var(--navy);border-color:#fff}
.showcase:has(input:checked) .sc-tabs .sc-tab-l:not(#sc-l:checked+label){background:none;color:#e4e8f0;border-color:#5d6a8a}
.sc-tabs input:focus-visible+label{outline:3px solid var(--focus);outline-offset:2px}
/* A picked scene shows alone. */
.showcase:has(input:checked) .sc-scene{visibility:hidden;--d:0s}
.showcase:has(#sc-l:checked) .sc-l,.showcase:has(#sc-r:checked) .sc-r,.showcase:has(#sc-w:checked) .sc-w,.showcase:has(#sc-s:checked) .sc-s{visibility:visible;opacity:1}

@media (prefers-reduced-motion:no-preference){
 .sc-scene{visibility:visible;opacity:0;animation:sc-cycle 24s linear var(--d) infinite}
 .showcase:has(input:checked) .sc-scene{animation:none;opacity:0}
 .sc-tabs label{animation:sc-tab 24s step-end var(--d) infinite}
 .showcase:has(input:checked) .sc-tabs label{animation:none}
 .sc-fill{animation:sc-fill 6s linear var(--d) infinite}
 .sc-ask{animation:sc-ask 6s ease-out var(--d) infinite}
 .sc-wait,.sc-pick,.sc-pick::before,.sc-sel .sc-v0,.sc-sel .sc-v1,.sc-list,.sc-hi,.sc-w p span,.sc-wc,.sc-prep,.sc-rec,.sc-clock{animation:6s step-end var(--d) infinite}
 .sc-wait{animation-name:sc-wait}.sc-pick{animation-name:sc-pick}.sc-pick::before{animation-name:sc-pick-dot}
 .sc-sel1 .sc-v0{animation-name:sc-v0a}.sc-sel1 .sc-v1{animation-name:sc-v1a}.sc-list{animation-name:sc-list}.sc-hi{animation-name:sc-hi}
 .sc-sel2 .sc-v0{animation-name:sc-v0b}.sc-sel2 .sc-v1{animation-name:sc-v1b}
 .sc-w .sc-t1{animation-name:sc-t1}.sc-w .sc-t2{animation-name:sc-t2}.sc-w .sc-t3{animation-name:sc-t3}.sc-w .sc-t4{animation-name:sc-t4}.sc-w .sc-t5{animation-name:sc-t5}.sc-w .sc-t6{animation-name:sc-t6}
 .sc-wc{animation-name:sc-wc}.sc-prep{animation-name:sc-prep}.sc-rec{animation-name:sc-rec}.sc-c1{animation-name:sc-sp}.sc-c2{animation-name:sc-rs}
 .sc-w .caret{animation:sc-blink 1s step-end infinite}
 .sc-dot{animation:sc-blink 1.2s step-end infinite}
 .sc-meter i{animation:sc-level .5s ease-in-out infinite alternate}
 .sc-meter i:nth-child(2n){animation-duration:.42s;animation-delay:-.2s}.sc-meter i:nth-child(3n){animation-duration:.6s;animation-delay:-.35s}
 /* Pause on hover or focus. */
 .showcase:hover *,.showcase:focus-within *{animation-play-state:paused}
}
@keyframes sc-cycle{0%{opacity:0;transform:translateX(14px)}2%,23%{opacity:1;transform:none}25%{opacity:0;transform:translateX(-14px)}100%{opacity:0}}
@keyframes sc-tab{0%{background:#fff;color:var(--navy);border-color:#fff}23%,100%{background:none;color:#e4e8f0;border-color:#5d6a8a}}
@keyframes sc-fill{0%,5%{transform:scaleX(0)}50%,100%{transform:scaleX(1)}}
@keyframes sc-wait{0%{visibility:visible}50%,100%{visibility:hidden}}
@keyframes sc-ask{0%,50%{opacity:0;transform:translateY(6px)}56%,100%{opacity:1;transform:none}}
@keyframes sc-pick{0%{border-color:var(--line);background:none}72%,100%{border-color:var(--listen);background:var(--listen-bg)}}
@keyframes sc-pick-dot{0%{border:1.5px solid var(--line-strong)}72%,100%{border:4px solid var(--listen)}}
@keyframes sc-v0a{0%{visibility:visible}42%,100%{visibility:hidden}}
@keyframes sc-v1a{0%{visibility:hidden}42%,100%{visibility:visible}}
@keyframes sc-list{0%{visibility:hidden}16%{visibility:visible}42%,100%{visibility:hidden}}
@keyframes sc-hi{0%{background:none;color:var(--ink);font-weight:400}30%,100%{background:var(--read-bg);color:var(--read);font-weight:600}}
@keyframes sc-v0b{0%{visibility:visible}68%,100%{visibility:hidden}}
@keyframes sc-v1b{0%{visibility:hidden}68%,100%{visibility:visible}}
@keyframes sc-t1{0%{opacity:0}8%,100%{opacity:1}}
@keyframes sc-t2{0%{opacity:0}20%,100%{opacity:1}}
@keyframes sc-t3{0%{opacity:0}32%,100%{opacity:1}}
@keyframes sc-t4{0%{opacity:0}44%,100%{opacity:1}}
@keyframes sc-t5{0%{opacity:0}56%,100%{opacity:1}}
@keyframes sc-t6{0%{opacity:0}68%,100%{opacity:1}}
@keyframes sc-wc{0%{--wc:3}8%{--wc:8}20%{--wc:11}32%{--wc:14}44%{--wc:16}56%{--wc:18}68%,100%{--wc:21}}
@keyframes sc-blink{0%{opacity:1}50%{opacity:0}}
@keyframes sc-prep{0%{visibility:visible}45%,100%{visibility:hidden}}
@keyframes sc-rec{0%{visibility:hidden}45%,100%{visibility:visible}}
@keyframes sc-sp{0%{--sp:30}12%{--sp:29}24%{--sp:28}36%,100%{--sp:27}}
@keyframes sc-rs{0%,45%{--rs:59}62%{--rs:58}79%{--rs:57}96%,100%{--rs:56}}
@keyframes sc-level{from{transform:scaleY(.2)}to{transform:scaleY(1)}}

/* Trust strip */
.trust{list-style:none;display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px 24px;margin:-34px auto 0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 26px;box-shadow:0 10px 30px -18px rgba(10,16,35,.35);position:relative;font-weight:600;font-size:15px;max-width:1112px}
.trust li{display:flex;align-items:center;gap:10px}
.ic{color:var(--brand);flex:none}

/* Sections */
.sec{padding:88px 0}
.sec.alt{background:var(--soft)}
.steps3{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps3 li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;display:flex;flex-direction:column}
.steps3 p{color:var(--ink-2);flex:1}
.num{width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;margin-bottom:14px}
.mini{border-radius:10px;background:var(--soft);padding:12px;font-size:13px;margin-top:6px}
.mini-skills{display:flex;flex-wrap:wrap;gap:6px}
.sk{padding:4px 10px;border-radius:20px;font-weight:600}
.sk.listen{background:var(--listen-bg);color:var(--listen)}.sk.read{background:var(--read-bg);color:var(--read)}
.sk.write{background:var(--write-bg);color:var(--write)}.sk.speak{background:var(--speak-bg);color:var(--speak)}
.mini-chat{display:flex;flex-direction:column;gap:6px}
.bubble{padding:7px 11px;border-radius:12px;max-width:90%;line-height:1.4}
.bubble.me{align-self:flex-end;background:var(--navy);color:#fff;border-bottom-right-radius:3px}
.bubble.ai{background:#fff;border:1px solid var(--line);border-bottom-left-radius:3px}
.mini-feed{display:flex;gap:10px;align-items:center;background:var(--ok-bg)}
.mini-feed b,.mini-feed small{display:block}.mini-feed small{color:var(--ok)}
.dot{width:10px;height:10px;border-radius:50%;background:var(--ok);flex:none}

.grid4{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;display:flex;flex-direction:column}
.card .ic{margin-bottom:12px}
.card p{color:var(--ink-2);font-size:16px;flex:1}
.tag{align-self:flex-start;font-size:13px;font-weight:600;background:var(--soft-2);color:var(--ink);padding:4px 10px;border-radius:20px}

.coach{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.ticks{padding:0;list-style:none;margin:0 0 20px}
.ticks li{padding-left:30px;position:relative;margin-bottom:8px}
.ticks li::before{content:"";position:absolute;left:4px;top:7px;width:12px;height:7px;border-left:2.5px solid var(--ok);border-bottom:2.5px solid var(--ok);transform:rotate(-45deg)}
.honest{background:var(--soft);border-left:4px solid var(--brand);padding:14px 16px;border-radius:0 10px 10px 0;font-size:16px}
.shot-report{padding:22px}
.rep-head{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.pill{font-size:13px;font-weight:600;padding:3px 10px;border-radius:20px}
.pill.write{background:var(--write-bg);color:var(--write)}
.rep-by{font-size:12px;color:var(--ink-2)}
.rep-est{display:flex;gap:16px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:10px}
.rep-est .big{font-family:var(--serif);font-size:52px;line-height:1;color:var(--navy)}
.rep-label{font-size:13px;color:var(--ink-2);line-height:1.4}
.rep-why{font-size:14px;color:var(--ink-2);margin:12px 0}
.rep-fix{background:var(--write-bg);border-radius:10px;padding:12px 14px;margin-bottom:12px}
.rep-fix p{margin:2px 0 0;font-size:14px}
.quote{border-left:3px solid var(--brand);background:#f1f3f6;padding:10px 14px;border-radius:0 8px 8px 0;margin-bottom:12px}
.quote small{color:var(--ink-2);font-size:12px}.quote p{margin:2px 0 0;font-size:14px}
mark{background:var(--mark);padding:0 2px}
.rep-link{color:var(--brand);font-weight:600;font-size:14px}

.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px}
.faq summary{cursor:pointer;list-style:none;padding:18px 54px 18px 20px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:24px;color:var(--brand);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq summary h3{margin:0;font-size:18px}
.faq details p{padding:0 20px 18px;margin:0;color:var(--ink-2)}

.closing{background:var(--navy);color:#fff;text-align:center}
.closing h2{margin:0 auto 12px}
.closing p{color:#dfe4ee;margin-bottom:28px}
.closing-in{display:flex;flex-direction:column;align-items:center}

.foot{background:#fff;border-top:1px solid var(--line);padding:36px 0 44px;font-size:14px;color:var(--ink-2)}
.foot-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot-in>div{max-width:560px}
.foot .brand{color:var(--ink);font-size:22px;margin-bottom:8px}
.foot .brand .accent{color:var(--brand)}
.foot .brandmark{width:26px;height:26px}.foot .brandmark svg{box-shadow:none}
.foot nav{display:flex;flex-direction:column;gap:8px}
.foot nav a{color:var(--ink)}

@media (max-width:980px){
 .hero-in,.coach{grid-template-columns:1fr;gap:40px}
 .grid4,.g3{grid-template-columns:repeat(2,1fr)}
 .steps3{grid-template-columns:repeat(2,1fr)}
 .shot-test{transform:none}
}
@media (max-width:760px){.hide-s{display:none}}
@media (max-width:600px){
 body{font-size:16px}
 .wrap{padding:0 18px}
 .hero{padding:40px 0 72px}
 .cta{flex-direction:column;align-items:stretch;gap:14px}.cta .link-light{text-align:center}
 .btn.big{width:100%}
 .shot-body{grid-template-columns:1fr}.shot-q{border-right:0;border-bottom:1px solid var(--line)}
 .shot-bar{flex-wrap:wrap}.shot-bar span:first-child{flex-basis:100%}
 .sc-tabs{gap:6px}.sc-tabs label{padding:6px 9px;font-size:13px}
 .trust{margin:-30px 18px 0;padding:16px 18px;flex-direction:column}
 .sec{padding:64px 0}
 .grid4,.g3,.steps3{grid-template-columns:1fr}
 .shot-report{padding:16px}
 .rep-est .big{font-size:44px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}