@import url("https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Bricolage+Grotesque:opsz,wght@12..96,700;12..96,800&display=swap");
:root{--ink:#0f1b2d;--ink2:#3a4a60;--sea:#0e9f8e;--sead:#0A4F47;--sun:#8A5A00;--sand:#fbf6ee;--card:#fff;--line:#e8e0d2;--r:16px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Atkinson Hyperlegible",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--sand);line-height:1.65;font-size:17px}
h1,h2,h3{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
h2{font-size:clamp(1.6rem,4vw,2.2rem)}
a{color:var(--sead)}
img,svg{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
header.site{position:sticky;top:0;background:rgba(251,246,238,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:"Bricolage Grotesque","Segoe UI",sans-serif;font-weight:700;font-size:1.2rem}
.logo b{color:var(--sea)}
nav.main a{margin-left:22px;text-decoration:none;color:var(--ink2);font-weight:500;padding-bottom:3px}
nav.main a:hover{color:var(--ink)}
nav.main a[aria-current=page]{color:var(--ink);border-bottom:2px solid var(--sun)}
.menu-btn{display:none;background:none;border:1.5px solid var(--ink);border-radius:10px;padding:6px 12px;font:inherit;font-weight:600;color:var(--ink)}
@media(max-width:780px){.menu-btn{display:block}nav.main{display:none;position:absolute;top:64px;left:0;right:0;background:var(--sand);border-bottom:1px solid var(--line);padding:6px 20px 16px}nav.main.open{display:block}nav.main a{display:block;margin:0;padding:12px 0;border-bottom:1px solid var(--line)}nav.main a[aria-current=page]{border-bottom:1px solid var(--line);color:var(--sun)}}
.hero{padding:72px 0 48px}
.hero.small{padding:56px 0 24px}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--sead);background:#dff3ef;padding:4px 12px;border-radius:999px}
.hero h1{font-size:clamp(2.3rem,7vw,4rem);margin:16px 0}
.hero.small h1{font-size:clamp(2rem,5.5vw,3rem)}
.hero h1 em{font-style:normal;color:var(--sun)}
.lead{font-size:1.15rem;color:var(--ink2);max-width:640px}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-block;padding:12px 22px;border-radius:999px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600}
.btn:hover{background:var(--sead)}
.btn.alt{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.alt:hover{background:var(--ink);color:#fff}
section{padding:44px 0}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column}
.card h3{font-size:1.2rem}
.card p{color:var(--ink2);margin:0 0 14px}
.card .more{margin-top:auto;font-weight:600;text-decoration:none}
.num{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;font-weight:700;font-size:2rem;color:var(--sea);line-height:1;margin-bottom:10px}
.tag{font-size:.74rem;font-weight:700;color:var(--sun);text-transform:uppercase;letter-spacing:.07em;margin-bottom:6px}
.two{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
ul.check,ul.cross{list-style:none;padding:0;margin:0}
ul.check li,ul.cross li{padding:8px 0 8px 30px;position:relative;border-bottom:1px solid var(--line)}
ul.check li:last-child,ul.cross li:last-child{border-bottom:0}
ul.check li:before{content:'✓';position:absolute;left:4px;color:var(--sea);font-weight:700}
ul.cross li:before{content:'✕';position:absolute;left:4px;color:var(--sun);font-weight:700}
.band{background:var(--ink);color:#fff;border-radius:24px;padding:40px 28px;margin:12px 0}
.band p,.band .lead{color:#c8d3e0}
.band .card{background:#17263c;border-color:#26384f}
.band .card p{color:#c8d3e0}
.band h3{color:#fff}
.ad{border:1.5px dashed #d8cdb9;border-radius:12px;text-align:center;padding:22px 16px;color:#9a8f7c;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;margin:8px 0}
.progress-box{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:8px 0 28px}
.progress{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin-top:8px}
.progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--sea),var(--sun));transition:width .35s}
.level{margin:0 0 44px;scroll-margin-top:84px}
.level-num{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;font-weight:700;color:var(--sea);font-size:.9rem;letter-spacing:.08em;text-transform:uppercase}
details.lesson{background:#fff;border:1px solid var(--line);border-radius:14px;margin:10px 0;padding:0 20px}
details.lesson[open]{border-color:var(--sea)}
details.lesson summary{cursor:pointer;padding:18px 0;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
details.lesson summary::-webkit-details-marker{display:none}
details.lesson summary:after{content:'+';color:var(--sea);font-size:1.5rem;line-height:1;flex:none}
details.lesson[open] summary:after{content:'–'}
details.lesson summary small{display:block;font-weight:400;color:var(--ink2);font-size:.88rem}
.lesson .body{padding-bottom:20px}
.lesson .body p{margin:0 0 12px}
.try{background:#fff3ee;border-left:3px solid var(--sun);padding:12px 16px;border-radius:8px;margin:14px 0}
.done{display:inline-flex;gap:8px;align-items:center;font-size:.92rem;font-weight:600;color:var(--ink2);cursor:pointer}
.done input{width:18px;height:18px;accent-color:var(--sea)}
dl.gloss{display:grid;gap:4px 24px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));margin:0}
dl.gloss div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px}
dl.gloss dt{font-weight:700;font-family:"Bricolage Grotesque","Segoe UI",sans-serif}
dl.gloss dd{margin:2px 0 0;color:var(--ink2);font-size:.95rem}
.src{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:10px 0}
.src h3{font-size:1.08rem;margin:0 0 4px}
.src p{margin:0;color:var(--ink2);font-size:.95rem}
.src a{font-weight:600}
.note{background:#dff3ef;border-radius:14px;padding:16px 20px;color:var(--ink)}
.prose p,.prose li{color:var(--ink2)}
.prose h2{margin-top:1.6em;font-size:1.4rem}
footer.site{border-top:1px solid var(--line);padding:36px 0 44px;color:var(--ink2);font-size:.9rem;margin-top:24px}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}
footer.site a{color:var(--ink2);margin-right:16px}
/* ---- App (PWA) ---- */
.tabbar{display:none}
.app-only{display:none}
@media (display-mode: standalone){
  .tabbar{display:flex;position:fixed;bottom:0;left:0;right:0;background:rgba(251,246,238,.97);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:30}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.7rem;font-weight:600;color:var(--ink2);text-decoration:none;padding:4px 0}
  .tabbar a[aria-current=page]{color:var(--sea)}
  .tabbar svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
  header.site{padding-top:env(safe-area-inset-top)}
  .menu-btn,nav.main{display:none!important}
  .hide-in-app{display:none!important}
  .app-only{display:block}
  footer.site{margin-bottom:8px}
}
.app-hero{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.app-icon{width:96px;height:96px;border-radius:22px;background:var(--ink);display:grid;place-items:center;box-shadow:0 10px 30px rgba(15,27,45,.25);flex:none}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;position:relative;padding:12px 0 12px 46px;border-bottom:1px solid var(--line);color:var(--ink2)}
.steps li:last-child{border-bottom:0}
.steps li:before{content:counter(s);position:absolute;left:0;top:10px;width:30px;height:30px;border-radius:50%;background:var(--sea);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.9rem}
.steps strong{color:var(--ink)}
button.btn{border:0;font:inherit;font-weight:600;cursor:pointer}nav.main a.nav-app{background:var(--sun);color:#fff;padding:7px 14px;border-radius:999px;border:0}
nav.main a.nav-app:hover{color:#fff;filter:brightness(.95)}
@media(max-width:780px){nav.main a.nav-app{display:block;text-align:center;margin-top:10px;padding:12px;border-bottom:0}}
.small{font-size:.9rem}

/* ---- Learn hub & lesson pages ---- */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.muted{color:var(--ink2)}
.eyebrow-s{display:block;font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--sun);margin-bottom:2px}
.lprog{margin:4px 0 22px}
.lprog-top{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:12px}
.lprog-num{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;font-size:1.35rem}
.badge-done{font-weight:700;color:var(--sead)}
.lvl-mini{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}
.lvl-mini-item{display:block;text-decoration:none;color:var(--ink);background:var(--sand);border-radius:12px;padding:8px 10px;font-size:.82rem}
.lvl-mini-item b{float:right}
.lvl-mini-item i{display:block;height:5px;background:var(--line);border-radius:9px;margin-top:6px;overflow:hidden}
.lvl-mini-item em{display:block;height:100%;background:var(--sea)}
@media(max-width:600px){.lvl-mini{grid-template-columns:repeat(2,1fr)}}
.linkbtn{background:none;border:0;padding:0;font:inherit;color:var(--sead);text-decoration:underline;cursor:pointer}
.lfilters{position:sticky;top:64px;z-index:5;background:var(--sand);padding:10px 0;margin-bottom:6px}
.lsearch{width:100%;padding:13px 16px;border-radius:14px;border:1.5px solid var(--line);font:inherit;background:#fff}
.lsearch:focus{outline:none;border-color:var(--sea)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:7px 14px;font:inherit;font-size:.88rem;font-weight:600;color:var(--ink2);cursor:pointer}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}
.lvl-sec{padding:26px 0 8px;scroll-margin-top:150px}
.lvl-sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.lvl-sec-head h2{margin:0}
.lvl-count{font-weight:600;color:var(--ink2);font-size:.92rem}
.lvl-blurb{color:var(--ink2);max-width:760px;margin:.5em 0}
.best-after{display:inline-block;background:#dff3ef;color:var(--ink);border-radius:10px;padding:8px 12px;font-size:.9rem;margin:0 0 6px}
.mod-head{font-size:1.02rem;margin:22px 0 10px}
.mod-head span{color:var(--sun);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;margin-right:6px}
.ltiles{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin-top:12px}
.ltile{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.ltile:hover{border-color:var(--sea);transform:translateY(-1px)}
.ltile.next{border-color:var(--sun);box-shadow:0 0 0 3px #fff0eb}
.lnum{flex:none;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-family:"Bricolage Grotesque","Segoe UI",sans-serif;font-weight:700;background:#dff3ef;color:var(--sead)}
.ltile.done .lnum{background:var(--sea);color:#fff}
.ltile.next .lnum{background:var(--sun);color:#fff}
.lbody{display:flex;flex-direction:column;gap:2px;min-width:0}
.lmod{font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--ink2)}
.lbody strong{line-height:1.3}
.lsub{color:var(--ink2);font-size:.92rem;line-height:1.4}
.lmeta{font-size:.8rem;color:var(--ink2);margin-top:6px}
.lmeta .ok{color:var(--sead)}.lmeta .nx{color:var(--sun)}
.lvl-pill{display:inline-block;font-size:.72rem;font-weight:700;border-radius:999px;padding:2px 9px;letter-spacing:.02em}
.lvl-beginner{background:#dff3ef;color:#0b6b60}
.lvl-intermediate{background:#fff0d6;color:#8a5a00}
.lvl-advanced{background:#ffe3dc;color:#b23a1d}
.lvl-life{background:#e8e6f7;color:#4a3f9a}
.extras,.credits{padding:34px 0 0}
.xcard{text-decoration:none;color:var(--ink)}
.xcard:hover{border-color:var(--sea)}
.credits ul{padding-left:18px;color:var(--ink2)}
.credits li{margin:4px 0}
/* lesson page */
.crumbs{font-size:.86rem;color:var(--ink2);padding:28px 0 6px}
.crumbs a{color:var(--ink2)}
.lhead h1{font-size:clamp(1.9rem,5vw,2.6rem);margin:12px 0 10px}
.mod-tag{font-size:.8rem;color:var(--ink2);font-weight:600}
.lmeta-line{color:var(--ink2);font-size:.92rem;margin:0}
.done-banner{background:#dff3ef;border-radius:12px;padding:10px 14px;font-weight:600;margin:14px 0 0}
.lesson-body{margin-top:22px}
.lesson-body .lead{font-size:1.15rem;color:var(--ink)}
.lesson-body h2{font-size:1.35rem;margin:1.5em 0 .5em}
.lesson-body p,.lesson-body li{color:#2b3a4f}
.lesson-body li{margin:4px 0}
.try-box{background:#fff3ee;border-left:4px solid var(--sun);border-radius:10px;padding:14px 18px;margin:26px 0 12px}
.takeaways{background:#dff3ef;border-radius:12px;padding:14px 18px;margin:0 0 10px}
.testyou{margin-top:34px;border-top:1px solid var(--line);padding-top:18px}
.quiz{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;margin:14px 0}
.qnum{font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--sun);margin:0 0 4px}
.qq{font-weight:700;font-size:1.05rem;margin:0 0 10px}
.quiz .opt{display:block;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0;font:inherit;cursor:pointer;color:var(--ink)}
.quiz .opt:hover:not(:disabled){border-color:var(--ink)}
.quiz .opt:disabled{cursor:default}
.quiz .opt.good{border-color:var(--sea);background:#e6f6f3}
.quiz .opt.bad{border-color:#e2553a;background:#fdecea}
.quiz .why{margin:8px 0 0;color:var(--ink2);font-size:.95rem}
.qres{border-radius:16px;padding:18px;margin:10px 0}
.qres p{margin:6px 0 12px}
.qres.pass{background:#e6f6f3}.qres.fail{background:#fff3ee}
.btn.dark{background:var(--ink);border:0;color:#fff}
.lsources{margin-top:30px}
.lsources h2{font-size:1.15rem}
.lsources ul{padding-left:18px}
.pager{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:26px;padding-top:16px;font-weight:600}
.pager a{text-decoration:none}
.pager .nextl{margin-left:auto;text-align:right}
.app-hint{margin-top:18px}
@media (display-mode: standalone){.lfilters{top:calc(64px + env(safe-area-inset-top))}}

[hidden]{display:none!important}