@font-face{font-family:"Bricolage";src:url(bricolage-grotesque-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Atkinson";src:url(atkinson-hyperlegible-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Atkinson";src:url(atkinson-hyperlegible-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}

:root{
  /* surfaces: white, off-white, light grey */
  --white:#FFFFFF;--off:#F7F7F5;--grey:#ECEDEF;--grey-2:#E2E4E7;--line:#D8DBDF;
  /* text and key depth (only for legibility) */
  --ink:#1F2125;--ink-2:#4B5058;--depth:#BFC3C9;--depth-2:#A9AEB5;
  --display:"Bricolage","Arial Narrow",system-ui,sans-serif;
  --body:"Atkinson",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1160px;--head:68px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--head) + 12px)}
body{margin:0;font-family:var(--body);font-size:1.0625rem;line-height:1.65;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:3px}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.12;letter-spacing:-.015em;margin:0 0 .5em}
h2{font-size:clamp(1.8rem,3.2vw,2.6rem)}
h3{font-size:1.25rem;letter-spacing:0}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--ink-2);outline-offset:3px;border-radius:4px}
.wrap{width:min(var(--wrap),100% - 40px);margin-inline:auto}
.skip{position:absolute;left:-999px;top:8px;background:var(--white);padding:8px 14px;z-index:100}
.skip:focus{left:8px}

/* sections */
.band{padding:clamp(64px,9vw,112px) 0;border-top:1px solid var(--line)}
.band--white{background:var(--white)}
.band--off{background:var(--off)}
.band--grey{background:var(--grey)}
.lede{font-size:1.15rem;color:var(--ink-2);max-width:62ch}
.sec-head{max-width:720px;margin-bottom:44px}

/* keycap primitive */
.cap{display:inline-flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;
  background:linear-gradient(#FFFFFF,#F1F2F4);color:var(--ink);border-radius:12px;border:1px solid var(--line);
  box-shadow:0 6px 0 var(--depth),inset 0 1px 0 #fff;position:relative}

/* header */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.site-head .wrap{display:flex;align-items:center;gap:24px;height:var(--head)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-size:1.35rem;font-weight:700;color:var(--ink)}
.brand img{width:34px;height:34px}
.nav{margin-left:auto}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;align-items:center}
.nav a{display:block;padding:8px 11px;border-radius:8px;text-decoration:none;color:var(--ink-2);font-size:.97rem}
.nav a:hover{background:var(--grey);color:var(--ink)}
.nav .nav-cta{background:var(--grey);color:var(--ink);font-weight:700;margin-left:8px;border:1px solid var(--line);box-shadow:0 3px 0 var(--depth)}
.nav .nav-cta:hover{background:var(--grey-2)}
.menu-btn{display:none;margin-left:auto;width:48px;height:42px;background:var(--grey);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:0;cursor:pointer;align-items:center;justify-content:center;box-shadow:0 3px 0 var(--depth)}
.menu-icon{width:22px;height:16px;display:flex;flex-direction:column;justify-content:space-between}
.menu-icon span{display:block;width:100%;height:2px;background:currentColor;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.menu-btn[aria-expanded="true"] .menu-icon span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] .menu-icon span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] .menu-icon span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:980px){
  .menu-btn{display:flex}
  .nav{position:absolute;left:0;right:0;top:var(--head);background:var(--white);border-bottom:1px solid var(--line);display:none}
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:stretch;padding:10px 20px 18px}
  .nav .nav-cta{margin:8px 0 0;text-align:center}
}

/* hero */
.hero{background:var(--grey);padding:clamp(48px,7vw,88px) 0 clamp(56px,8vw,96px);overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,64px);align-items:center}
.hero h1{font-size:clamp(1.15rem,1.6vw,1.3rem);font-family:var(--body);font-weight:700;letter-spacing:0;color:var(--ink-2);margin-bottom:22px}
.word{display:flex;flex-wrap:nowrap;gap:clamp(4px,.6vw,8px);margin:0 0 30px}
.word .cap{flex:0 0 auto;width:clamp(34px,4.6vw,62px);height:clamp(38px,5.1vw,68px);font-size:clamp(1.2rem,2.6vw,2.1rem)}
.word .cap--home::after{content:"";position:absolute;bottom:9%;left:50%;width:28%;height:3px;transform:translateX(-50%);background:var(--depth-2);border-radius:2px}
.hero .intro{font-size:1.18rem;color:var(--ink-2);max-width:52ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 24px;border-radius:12px;text-decoration:none;font-weight:700;font-size:1.02rem;cursor:pointer;font-family:var(--body);color:var(--ink)}
.btn--light{background:var(--white);border:1px solid var(--line);box-shadow:0 5px 0 var(--depth)}
.btn--light:hover{background:var(--off)}
.btn--ghost{background:transparent;border:1px solid var(--depth)}
.btn--ghost:hover{background:var(--white)}
.btn:active{transform:translateY(3px);box-shadow:0 2px 0 var(--depth)}
.hero-art{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--white)}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr}}
@media (prefers-reduced-motion:no-preference){
  .word .cap{animation:press .5s ease both}
  .word .cap:nth-child(2){animation-delay:.07s}.word .cap:nth-child(3){animation-delay:.14s}.word .cap:nth-child(4){animation-delay:.21s}
  .word .cap:nth-child(5){animation-delay:.28s}.word .cap:nth-child(6){animation-delay:.35s}.word .cap:nth-child(7){animation-delay:.42s}.word .cap:nth-child(8){animation-delay:.49s}
  @keyframes press{0%{transform:translateY(0)}40%{transform:translateY(5px);box-shadow:0 1px 0 var(--depth)}100%{transform:translateY(0)}}
}

/* download: the spacebar */
.download .wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center}
.spacebar{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:100%;min-height:128px;padding:22px;text-decoration:none;
  background:linear-gradient(#FFFFFF,#EEEFF1);color:var(--ink);border:1px solid var(--line);border-radius:20px;box-shadow:0 10px 0 var(--depth);transition:transform .08s,box-shadow .08s}
.spacebar strong{font-family:var(--display);font-size:clamp(1.4rem,2.6vw,1.9rem)}
.spacebar span{color:var(--ink-2);font-size:.98rem}
.spacebar:hover{background:linear-gradient(#FFFFFF,#F5F6F7)}
.spacebar:active{transform:translateY(8px);box-shadow:0 2px 0 var(--depth)}
.dl-meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:26px;color:var(--ink-2);font-size:.95rem;justify-content:center}
.dl-list{padding-left:1.1em;margin:0}
.dl-list li{margin-bottom:.4em}
@media (max-width:860px){.download .wrap{grid-template-columns:1fr}}

/* about */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px)}
.split p{max-width:60ch}
.pull{font-family:var(--display);font-size:clamp(1.4rem,2.4vw,1.9rem);line-height:1.25;border-left:6px solid var(--depth);padding-left:22px;margin:0 0 24px}
@media (max-width:860px){.split{grid-template-columns:1fr}}

/* features as key legends */
.legend{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--depth)}
.legend > div{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:28px 24px 28px 0;border-bottom:1px solid var(--depth)}
.legend > div:nth-child(odd){border-right:1px solid var(--depth)}
.legend > div:nth-child(even){padding-left:28px}
.legend .cap{width:58px;height:58px;font-size:1.4rem}
.legend h3{margin-bottom:6px}
.legend p{margin:0;color:var(--ink-2)}
@media (max-width:760px){.legend{grid-template-columns:1fr}.legend > div:nth-child(odd){border-right:0}.legend > div:nth-child(even){padding-left:0}}

/* steps */
.steps{list-style:none;margin:0;padding:0;counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{counter-increment:s;background:var(--off);border:1px solid var(--line);border-radius:16px;padding:26px 22px}
.steps li::before{content:counter(s);display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;margin-bottom:16px;
  font-family:var(--display);font-size:1.3rem;background:var(--white);color:var(--ink);border:1px solid var(--line);border-radius:10px;box-shadow:0 4px 0 var(--depth)}
.steps p{margin:0;color:var(--ink-2)}
@media (max-width:960px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* lessons path */
.path{display:grid;grid-template-columns:repeat(5,1fr);position:relative}
.path::before{content:"";position:absolute;left:0;right:0;top:27px;height:2px;background:var(--depth)}
.path > div{position:relative;padding-right:18px}
.path .dot{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--white);border:1px solid var(--line);font-family:var(--display);font-size:.95rem;margin-bottom:18px;box-shadow:0 5px 0 var(--depth)}
.path h3{font-size:1.1rem}
.path p{color:var(--ink-2);font-size:.98rem}
@media (max-width:900px){.path{grid-template-columns:1fr 1fr;gap:28px}.path::before{display:none}}
@media (max-width:520px){.path{grid-template-columns:1fr}}

/* speed table */
.table-wrap{overflow-x:auto;border-radius:14px;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:560px;background:var(--white)}
th,td{text-align:left;padding:15px 20px;border-bottom:1px solid var(--grey)}
th{background:var(--grey);font-family:var(--display);font-weight:700}
tr:last-child td{border-bottom:0}
td:first-child{font-weight:700;white-space:nowrap}
.meter{display:block;height:8px;border-radius:4px;background:var(--grey);min-width:120px}
.meter i{display:block;height:100%;border-radius:4px;background:var(--depth-2)}

/* audience */
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,4vw,48px)}
.trio h3{font-size:1.5rem;padding-bottom:12px;border-bottom:3px solid var(--depth);display:inline-block}
.trio p{color:var(--ink-2)}
@media (max-width:820px){.trio{grid-template-columns:1fr}}

/* routine */
.routine{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.routine div{background:var(--grey);border-radius:14px;padding:22px}
.routine b{display:block;font-family:var(--display);font-size:2rem;line-height:1;margin-bottom:8px}
.routine p{margin:0;color:var(--ink-2)}
.tips{columns:2;column-gap:48px;margin-top:40px;padding-left:1.1em}
.tips li{break-inside:avoid;margin-bottom:12px}
@media (max-width:860px){.routine{grid-template-columns:1fr 1fr}.tips{columns:1}}

/* guide cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.card img{aspect-ratio:600/315;object-fit:cover;width:100%;border-bottom:1px solid var(--line)}
.card .body{padding:22px 22px 26px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:1.2rem}
.card h3 a{text-decoration:none}
.card h3 a:hover{text-decoration:underline}
.card p{color:var(--ink-2);font-size:.98rem;flex:1}
.read{font-weight:700;text-decoration:none;border-bottom:2px solid var(--depth-2);align-self:flex-start;padding-bottom:2px}
.read:hover{border-color:var(--ink)}
.guide-more{margin-top:40px;text-align:center}
@media (max-width:940px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.cards{grid-template-columns:1fr}}

/* faq */
#faq .sec-head{max-width:860px;margin-inline:auto;text-align:center;margin-bottom:44px}
#faq .sec-head h2,#faq .sec-head p{text-align:center;margin-inline:auto}
.faq{max-width:860px;margin-inline:auto}
.faq details{background:var(--off);border:1px solid var(--line);border-radius:12px;margin-bottom:12px}
.faq summary{list-style:none;cursor:pointer;padding:20px 60px 20px 24px;font-weight:700;font-size:1.08rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:8px;background:var(--white);border:1px solid var(--line);box-shadow:0 3px 0 var(--depth);display:flex;align-items:center;justify-content:center;font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details[open]{background:var(--white);border-color:var(--depth)}
.faq .ans{padding:0 24px 20px;color:var(--ink-2)}
.faq .ans p:last-child{margin:0}

/* footer */
.site-foot{background:var(--grey);color:var(--ink-2);padding:72px 0 0;font-size:.98rem;border-top:1px solid var(--line)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.site-foot .brand{margin-bottom:16px}
.site-foot h2{font-size:1.05rem;color:var(--ink);margin-bottom:16px;letter-spacing:0}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin-bottom:10px}
.site-foot a{text-decoration:none}
.site-foot a:hover{color:var(--ink);text-decoration:underline}
.foot-note{font-size:.92rem;max-width:40ch}
.foot-bar{margin-top:56px;border-top:1px solid var(--depth);padding:22px 0;display:flex;flex-wrap:wrap;justify-content:center;gap:12px;font-size:.9rem;text-align:center}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* scroll to top key */
.to-top{position:fixed;right:22px;bottom:22px;z-index:60;width:52px;height:52px;cursor:pointer;
  background:linear-gradient(#FFFFFF,#EEEFF1);color:var(--ink);border:1px solid var(--line);border-radius:12px;box-shadow:0 5px 0 var(--depth-2),0 8px 18px rgba(31,33,37,.12);
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s}
.to-top.show{opacity:1;visibility:visible}
.to-top:active{transform:translateY(4px);box-shadow:0 1px 0 var(--depth-2)}
.to-top svg{width:22px;height:22px}

/* inner pages */
.page-hero{background:var(--grey);padding:56px 0 48px}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.2rem);max-width:22ch}
.page-hero p{color:var(--ink-2);max-width:62ch;font-size:1.12rem;margin:0}
.crumbs{font-size:.92rem;color:var(--ink-2);margin-bottom:18px}
.prose{max-width:720px;margin-inline:auto}
.prose h2{font-size:1.65rem;margin-top:1.6em}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.25em}
.prose li{margin-bottom:.45em}
.prose .figure{margin:0 0 36px;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.page-hero .meta-line{color:var(--ink-2);font-size:.95rem;margin-top:14px}
.callout{background:var(--off);border:1px solid var(--line);border-left:5px solid var(--depth-2);padding:18px 22px;border-radius:0 12px 12px 0;margin:28px 0}
.related{margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
.sitemap-list{columns:2;column-gap:48px;padding-left:1.1em}
.sitemap-list li{margin-bottom:10px;break-inside:avoid}
@media (max-width:640px){.sitemap-list{columns:1}}

/* ---------- built-in typing tool ---------- */
.tool .sec-head{margin-bottom:32px}
.tt{background:var(--off);border:1px solid var(--line);border-radius:22px;padding:clamp(18px,3vw,32px);position:relative}
.tt-bar{display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center;justify-content:space-between;margin-bottom:18px}
.seg{display:inline-flex;background:var(--grey);border-radius:12px;padding:4px;gap:4px}
.seg button{font:inherit;font-weight:700;font-size:.95rem;border:0;background:transparent;color:var(--ink-2);padding:9px 16px;border-radius:9px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--white);color:var(--ink);box-shadow:0 2px 0 var(--depth)}
.tt-opt label{font-weight:700;font-size:.95rem;margin-right:8px}
.tt-lesson{font:inherit;padding:9px 12px;border-radius:10px;border:1px solid var(--depth);background:var(--white);color:var(--ink)}
.tt-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
.tt-stats div{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:12px 16px}
.tt-stats b{display:block;font-family:var(--display);font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.1}
.tt-stats span{font-size:.88rem;color:var(--ink-2)}
.tt-board{position:relative;background:var(--white);border:2px solid var(--line);border-radius:16px;cursor:text;padding:18px 24px 34px}
.tt-view{height:calc(3 * 2.4rem);overflow:hidden}
.tt-board.focus{border-color:var(--depth-2)}
.tt-text{position:relative;font-family:ui-monospace,"Cascadia Mono","Consolas","DejaVu Sans Mono",monospace;font-size:clamp(1.05rem,2.2vw,1.4rem);line-height:2.4rem;color:#9AA0A8;transition:transform .15s ease;word-break:normal}
.tt-text .w{display:inline-block;white-space:pre}
.tt-text .c{position:relative}
.tt-text .ok{color:var(--ink)}
.tt-text .bad{color:var(--ink);background:var(--grey-2);text-decoration:underline wavy var(--ink-2) 2px;text-underline-offset:5px;border-radius:3px}
.tt-text .sp.bad{background:var(--depth)}
.tt-text .cur{box-shadow:inset 2px 0 0 var(--ink)}
.tt-board.focus .tt-text .cur{animation:blink 1s steps(1) infinite}
@keyframes blink{50%{box-shadow:inset 2px 0 0 transparent}}
.tt-hint{position:absolute;inset:auto 0 8px 0;text-align:center;margin:0;font-size:.92rem;color:var(--ink-2);pointer-events:none}
.tt-hint.hide,.tt-board.focus .tt-hint.hide{display:none}
.tt-input{position:absolute;opacity:0;left:0;top:0;width:1px;height:1px;border:0;padding:0}
.tt-finger{min-height:1.6em;margin:14px 0 10px;font-weight:700;color:var(--ink-2);text-align:center}
.tt-kb{display:flex;flex-direction:column;gap:6px;align-items:center;user-select:none}
.tt-row{display:flex;gap:6px}
.k{width:clamp(22px,4.2vw,46px);height:clamp(28px,4.2vw,46px);display:flex;align-items:center;justify-content:center;border-radius:8px;
  background:var(--white);border:1px solid var(--line);box-shadow:0 3px 0 var(--depth);font-size:clamp(.62rem,1.3vw,.9rem);font-weight:700;color:var(--ink-2);transition:background .1s,transform .1s}
.k.wide{width:clamp(36px,7vw,78px)}
.k.space{width:clamp(150px,34vw,330px)}
.k[data-f="lp"],.k[data-f="rp"]{background:#F2F3F4}
.k[data-f="lr"],.k[data-f="rr"]{background:#F8F8F7}
.k.home{border-color:var(--depth-2)}
.k.next{background:var(--grey-2);color:var(--ink);border:2px solid var(--ink);transform:translateY(-2px)}
.k.miss{background:var(--depth);transform:translateY(2px);box-shadow:0 1px 0 var(--depth)}
.tt-actions{display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center;justify-content:center;margin-top:20px;color:var(--ink-2);font-size:.92rem}
.tt-result{position:absolute;inset:0;background:rgba(247,247,245,.97);border-radius:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;z-index:2}
.tt-result[hidden]{display:none}
.tt-result h3{font-size:1.6rem}
.tt-res{display:grid;grid-template-columns:repeat(4,minmax(90px,1fr));gap:12px;margin:10px 0 16px;width:min(620px,100%)}
.tt-res div{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px}
.tt-res b{display:block;font-family:var(--display);font-size:1.9rem;line-height:1.1}
.tt-res span{font-size:.88rem;color:var(--ink-2)}
.tt-level{max-width:52ch;color:var(--ink-2);margin-bottom:18px}
@media (max-width:640px){.tt-stats,.tt-res{grid-template-columns:repeat(2,1fr)}.tt-row{gap:3px}.tt-kb{gap:4px}.tt-board{padding:12px 14px 32px}}
@media (prefers-reduced-motion:reduce){.tt-text{transition:none}.tt-board.focus .tt-text .cur{animation:none}}

/* sitemap page */
.sm-group{margin-bottom:56px}
.sm-group > h2{font-size:1.5rem;margin-bottom:6px}
.sm-group > p{color:var(--ink-2);margin-bottom:20px}
.sm-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.sm-list li{margin:0}
.sm-list a{display:block;height:100%;background:var(--off);border:1px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none}
.sm-list a:hover{background:var(--white);border-color:var(--depth)}
.sm-list strong{display:block;font-size:1.04rem}
.sm-list span{display:block;color:var(--ink-2);font-size:.94rem;margin-top:2px}
.sm-list code{display:block;margin-top:8px;font-size:.82rem;color:#6A707A;font-family:ui-monospace,Consolas,monospace}
.sm-wide{max-width:960px;margin-inline:auto}
@media (max-width:700px){.sm-list{grid-template-columns:1fr}}