:root{
  --ink:#0A0A0A;--white:#FFFFFF;--paper:#FAFAFA;--soft:#F5F5F5;
  --line:#E5E5E5;--mid:#9A9A9A;--muted:#4A4A4A;
  font-family:Inter,Arial,sans-serif;color:var(--ink);background:var(--paper);
  font-synthesis:none;text-rendering:optimizeLegibility;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;padding:0 24px 52px;background:var(--paper);font-weight:300}
a{color:inherit;text-decoration:none}
.wrap{width:min(1100px,100%);margin-inline:auto}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:28px 4px 24px;gap:24px}
.wordmark{font-size:12px;font-weight:500;letter-spacing:.13em;white-space:nowrap}
.wordmark span{color:var(--mid);font-weight:300}
nav{display:flex;gap:24px;flex-wrap:wrap;justify-content:flex-end}
nav a{font-size:12px;color:var(--muted);transition:color .2s}
nav a:hover,nav a[aria-current=page]{color:var(--ink)}
main{display:grid;gap:28px}
.panel{position:relative;overflow:hidden;background:var(--white);border:1px solid rgba(0,0,0,.06);border-radius:28px;padding:76px;box-shadow:0 20px 60px rgba(0,0,0,.045),0 4px 12px rgba(0,0,0,.025)}
.hero{min-height:570px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}
.eyebrow{margin:0 0 26px;color:var(--mid);font-size:10px;font-weight:500;letter-spacing:.18em;text-transform:uppercase}
h1,h2,p{margin-top:0}
h1{font-size:clamp(48px,7vw,76px);line-height:.99;letter-spacing:-.065em;font-weight:300;margin:0 0 28px}
h1 em,h2 em{font-style:normal;color:var(--mid)}
h2{font-size:clamp(34px,4.4vw,54px);line-height:1.04;letter-spacing:-.055em;font-weight:300;margin:0 0 22px}
.lead{max-width:600px;color:var(--muted);font-size:20px;line-height:1.55;margin:0 0 34px}
.copy{max-width:560px;color:var(--muted);font-size:16px;line-height:1.75;margin:0 0 28px}
.button{display:inline-flex;align-items:center;gap:38px;border:1px solid var(--ink);border-radius:999px;background:var(--white);color:var(--ink);padding:15px 21px;font-size:13px;font-weight:400;transition:background .2s,color .2s,border-color .2s}
.button:hover{background:var(--ink);color:var(--white)}
.button span{font-size:17px}
.hero-meta{position:absolute;left:76px;right:76px;bottom:34px;display:flex;justify-content:space-between;color:var(--mid);font-size:9px;letter-spacing:.17em}
.intro{min-height:370px}
.text-link{display:inline-flex;gap:26px;border-bottom:1px solid var(--line);padding-bottom:7px;font-size:13px}
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px}
.page-head{padding-block:88px}
.page-head .lead{margin-bottom:0}
.three{display:grid;grid-template-columns:repeat(3,1fr)}
.three article{padding:8px 32px 6px;border-right:1px solid var(--line)}
.three article:first-child{padding-left:0}
.three article:last-child{border-right:0;padding-right:0}
.number{display:block;color:var(--mid);font-size:11px;letter-spacing:.14em;margin-bottom:64px}
.three h2{font-size:27px;letter-spacing:-.04em}
.three .copy{font-size:14px;margin:0}
.tag-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tag{min-height:74px;border:1px solid var(--line);border-radius:999px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;font-size:15px;transition:background .2s,color .2s,border .2s}
.tag span{color:var(--mid)}
.tag:hover{background:var(--ink);color:var(--white);border-color:var(--ink)}
.tag:hover span{color:var(--white)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.stats article{border-right:1px solid var(--line);padding-right:20px}
.stats article:last-child{border:0}
.stats strong{font-size:clamp(44px,6vw,70px);font-weight:300;letter-spacing:-.07em}
.stats strong span{font-size:.65em;color:var(--mid)}
.stats p{margin:10px 0 0;color:var(--muted);font-size:14px}
.fine-print{margin:48px 0 0;color:var(--mid);font-size:11px;line-height:1.6}
.cta{background:var(--ink);color:var(--white)}
.cta .eyebrow,.cta .copy{color:#9A9A9A}
.button.inverse{background:var(--white);color:var(--ink);border-color:var(--white)}
.button.inverse:hover{background:transparent;color:var(--white)}
.chat-panel{padding:42px 48px}
.chat-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:22px}
.chat-head .eyebrow{margin:0 0 9px;color:var(--muted)}
.chat-head p{font-size:9px;letter-spacing:.12em;color:var(--mid);margin:0}
.online-dot{font-size:10px;color:var(--muted)}
.messages{min-height:320px;max-height:520px;overflow:auto;padding:28px 0;display:flex;flex-direction:column;gap:16px}
.message{max-width:min(78%,580px);padding:17px 20px;border:1px solid var(--line);border-radius:20px;font-size:14px;line-height:1.7;white-space:pre-wrap}
.message.assistant{align-self:flex-start;background:var(--white)}
.message.user{align-self:flex-end;background:var(--soft);border-color:var(--soft)}
.message.assistant{max-width:min(88%,780px)}
.message-content{min-width:0;overflow-wrap:anywhere}
.message-content p{margin:0 0 12px;line-height:1.75}
.message-content p:last-child{margin-bottom:0}
.message-content h3,.message-content h4{font-weight:500;letter-spacing:-.025em;line-height:1.35;margin:5px 0 10px}
.message-content h3{font-size:17px}
.message-content h4{font-size:15px}
.message-content ul,.message-content ol{margin:8px 0 14px;padding-left:24px}
.message-content li{padding-left:4px;margin:5px 0;line-height:1.65}
.message-content li::marker{color:var(--mid)}
.message-content li.nested-item{margin-left:15px}
.message-content strong{font-weight:600}
.message-content em{font-style:italic}
.message-content code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em;background:var(--soft);border-radius:5px;padding:2px 5px}
.message-content hr{border:0;border-top:1px solid var(--line);margin:14px 0}
.speaker{display:block;font-size:9px;letter-spacing:.15em;color:var(--mid);margin-bottom:7px}
.chat-form{display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--ink);padding:12px 0}
.chat-form input{width:100%;border:0;outline:0;background:transparent;font:300 15px Inter,Arial,sans-serif;color:var(--ink);padding:12px 0}
.chat-form input::placeholder{color:var(--mid)}
.send{width:44px;height:44px;flex:0 0 44px;border:0;border-radius:50%;background:var(--ink);color:var(--white);font-size:20px;cursor:pointer;transition:transform .2s,background .2s}
.send:hover{transform:translateY(-2px);background:var(--muted)}
.send:disabled{opacity:.45;cursor:wait}
.chat-note{margin:15px 0 0;color:var(--mid);font-size:10px;line-height:1.6}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:54px;padding:22px 4px;color:var(--mid);font-size:10px;letter-spacing:.1em}
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:760px){
  body{padding:0 12px 30px}
  .topbar{align-items:flex-start;flex-direction:column;padding:22px 4px}
  nav{justify-content:flex-start;gap:16px}
  main{gap:18px}
  .panel{padding:32px;border-radius:24px}
  .hero{min-height:500px}
  .hero-meta{left:32px;right:32px;bottom:26px}
  .lead{font-size:17px}
  .split{grid-template-columns:1fr;gap:22px}
  .three{grid-template-columns:1fr;gap:25px}
  .three article,.three article:first-child,.three article:last-child{padding:0 0 24px;border-right:0;border-bottom:1px solid var(--line)}
  .three article:last-child{border-bottom:0;padding-bottom:0}
  .number{margin-bottom:25px}
  .tag-grid{grid-template-columns:1fr 1fr;gap:10px}
  .tag{min-height:62px;padding:0 16px;font-size:13px}
  .stats{grid-template-columns:1fr;gap:22px}
  .stats article{border-right:0;border-bottom:1px solid var(--line);padding:0 0 20px}
  .stats article:last-child{border-bottom:0;padding-bottom:0}
  .page-head{padding-block:58px}
  .chat-panel{padding:25px 20px}
  .message{max-width:90%}
  .message.assistant{max-width:94%}
  .message-content ul,.message-content ol{padding-left:21px}
  .footer{gap:14px;flex-wrap:wrap}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}.reveal{opacity:1;transform:none}}


/* Quiet English 2.0 learning and account UI */
.language-switch{display:flex;align-items:center;gap:7px}
.language-switch button{border:1px solid var(--line);background:transparent;border-radius:999px;padding:7px 10px;font:500 10px Inter,Arial,sans-serif;color:var(--muted);cursor:pointer}
.language-switch button.active{background:var(--ink);border-color:var(--ink);color:var(--white)}
.account-link{font-size:11px;border-bottom:1px solid var(--line);padding:6px 2px}
.auth-layout{display:flex;justify-content:center;padding:42px 0}
.auth-card{width:min(660px,100%);padding:56px}
.auth-card h1{font-size:clamp(40px,6vw,60px)}
.auth-card form,.auth-card label{display:flex;flex-direction:column;gap:9px}
.auth-card form{gap:18px;margin-top:28px}
.auth-card label,.form-grid label{font-size:12px;color:var(--muted);font-weight:400}
.auth-card input,.auth-card select,.form-grid input,.form-grid select,.field-block select{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:#fff;color:var(--ink);font:400 14px Inter,Arial,sans-serif}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid label{display:flex;flex-direction:column;gap:9px}
.form-status{min-height:20px;font-size:13px;line-height:1.5;color:var(--muted)}
.error-text{color:#9b3434!important}
.success-text{color:#36734f!important}
.success-text::before{content:"✓ "}
.notice-card{padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--paper)}
.notice-card[hidden]{display:none}
.check-row{display:flex!important;flex-direction:row!important;align-items:flex-start;gap:10px!important;line-height:1.55}
.check-row input{width:16px;height:16px;flex:0 0 16px;margin-top:2px}
.auth-foot{margin:24px 0 0;font-size:13px;color:var(--muted)}
.auth-foot a{text-decoration:underline;text-underline-offset:3px}
.field-block{margin:28px 0}
.field-block h3{font-size:18px;font-weight:400}
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.question-card{border:1px solid var(--line);border-radius:18px;padding:20px;margin:0 0 15px;min-width:0}
.question-card legend{font-size:16px;line-height:1.5;font-weight:400;padding:0 8px}
.option-row{display:flex;align-items:flex-start;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;margin:8px 0;cursor:pointer;line-height:1.5}
.option-row:has(input:checked){border-color:var(--ink);background:var(--soft)}
.option-row input{margin-top:3px;accent-color:var(--ink)}
.section-heading{display:flex;justify-content:space-between;align-items:center;gap:18px}
.section-heading h2{margin-bottom:0}
.pill{border:1px solid var(--line);border-radius:999px;padding:8px 12px;color:var(--muted);font-size:11px;white-space:nowrap}
.task-card,.exercise-card,.week-row,.error-card{border:1px solid var(--line);border-radius:18px;padding:22px;margin:12px 0}
.task-card h3,.exercise-card h3,.week-row h3{font-size:20px;font-weight:400;letter-spacing:-.03em;margin:0 0 12px}
.task-card .eyebrow,.exercise-card .eyebrow{margin-bottom:12px}
.today-secondary{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}
.today-secondary article{padding:20px;border:1px solid var(--line);border-radius:16px}
.today-secondary h3{font-size:24px;font-weight:300;margin:0 0 12px}
.week-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.week-row{margin:0}
.week-row h3{font-size:16px}
.week-row p{font-size:13px;color:var(--muted);line-height:1.6;margin:0}
.exercise-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.exercise-card{margin:0}
.exercise-card p:not(.eyebrow){font-size:13px;line-height:1.6;color:var(--muted)}
.text-link{cursor:pointer}
.exercise-prompt{font-size:24px;font-weight:400;letter-spacing:-.03em;margin:22px 0}
.reading-passage{border-left:2px solid var(--line);padding:10px 20px;margin:16px 0 24px;color:var(--muted);font-size:15px;line-height:1.8}
.option-list{margin:20px 0}
.result-box{margin:22px 0;padding:18px;border:1px solid var(--line);border-radius:16px;line-height:1.65}
.result-box.success{border-color:#8bb79a;background:#f4faf5}
.review-card{max-width:760px;margin-inline:auto}
.review-answer{font-size:22px;font-weight:500;margin:24px 0}
.rating-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.button.secondary{background:var(--soft);border-color:var(--line);color:var(--ink)}
.button.secondary:hover{background:var(--ink);color:#fff}
.stats-personal strong{font-size:52px}
.skill-progress-list{display:grid;gap:14px}
.skill-progress-row{display:grid;grid-template-columns:130px 48px 1fr;align-items:center;gap:12px;font-size:13px}
.skill-progress-row strong{text-align:right}
.progress-track{height:8px;background:var(--soft);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;background:#777;border-radius:999px}
.corrected-form{font-weight:500}
.error-card{padding:20px}
.error-card p{line-height:1.6}
@media(max-width:760px){
  .language-switch{width:100%;justify-content:flex-start}
  .auth-layout{padding:18px 0}
  .auth-card{padding:28px}
  .form-grid,.today-secondary,.week-list,.exercise-grid{grid-template-columns:1fr}
  .check-grid{grid-template-columns:1fr 1fr}
  .section-heading{align-items:flex-start;flex-direction:column}
  .skill-progress-row{grid-template-columns:90px 42px 1fr}
}

.nav-logout{border:0;background:transparent;color:var(--muted);font:400 11px Inter,Arial,sans-serif;text-decoration:underline;text-underline-offset:3px;cursor:pointer;padding:6px 2px}
.nav-logout:disabled{opacity:.5}
@media(max-width:760px){
  body{padding-bottom:104px}
  .topbar nav{position:fixed;left:12px;right:12px;bottom:12px;z-index:100;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:2px;padding:10px 6px;background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 32px rgba(0,0,0,.12);backdrop-filter:blur(12px)}
  .topbar nav a{text-align:center;font-size:10px;padding:5px 1px;white-space:nowrap}
  .topbar .language-switch{gap:8px}
}


/* Account and editorial CMS */
.button.danger{border-color:#9b3434;color:#9b3434;background:#fff}
.button.danger:hover{background:#9b3434;color:#fff}
.account-card{max-width:760px}
.account-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
[data-admin-page] textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:14px;background:#fff;font:13px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--ink);resize:vertical}
[data-admin-page] .field-block label{display:block;font-size:12px;color:var(--muted);font-weight:400}
[data-admin-page] .field-block textarea{margin-top:9px}
[data-admin-page] .rating-row{margin-top:18px}
[data-admin-page] .exercise-card{min-width:0}

.demo-notice{width:min(1100px,100%);margin:-10px auto 20px;padding:10px 15px;border:1px solid var(--line);border-radius:12px;background:var(--soft);color:var(--muted);font-size:11px;line-height:1.5;text-align:center}
.demo-hero-note{margin:15px 0 0!important;font-size:11px!important;letter-spacing:0!important}