/* One real-font specimen teaches position, then spacing. */
.usage-guide { padding-block:64px; }
.usage-heading { display:block; text-align:center; margin:0 auto; max-width:760px; }
.usage-heading h2 { font-size:clamp(44px,5vw,72px); line-height:.96; }
.usage-heading p { font-size:18px; line-height:1.6; margin:18px auto 0; }
.usage-heading a { margin-top:12px; font-size:13px; }
.usage-stage { display:grid; place-items:center; height:300px; overflow:hidden; }
.usage-composition { position:relative; display:flex; align-items:flex-start; width:max-content; gap:.38em; height:1.2em; font-size:clamp(76px,10vw,144px); line-height:1; transition:gap 1.1s cubic-bezier(.65,0,.25,1); }
.usage-symbol { position:relative; flex:none; top:.09em; font-size:1em; }
.usage-amount { display:block; flex:none; width:var(--amount-width,1.7em); overflow:hidden; font-size:1em; letter-spacing:-.03em; transition:width 1.1s cubic-bezier(.65,0,.25,1),opacity 1.1s; }
.usage-amount>span { display:block; width:max-content; white-space:nowrap; transform:translateY(0); transition:transform 1.1s cubic-bezier(.65,0,.25,1); }
.usage-gap { position:absolute; height:.13em; width:.38em; border:1px solid #DCE6AF; border-top:0; right:var(--amount-width,1.7em); top:1.07em; opacity:1; transform:scaleX(1); transform-origin:left; transition:opacity 1.1s,transform 1.1s cubic-bezier(.65,0,.25,1); }
.usage-motion[data-step="symbol"] .usage-amount { opacity:0; width:0; }
.usage-motion[data-step="symbol"] .usage-amount>span { transform:translateY(.22em); }
.usage-motion[data-step="symbol"] .usage-composition { gap:0; }
.usage-motion[data-step="symbol"] .usage-gap,.usage-motion[data-step="position"] .usage-gap { opacity:0; transform:scaleX(0); }
.usage-motion[data-step="position"] .usage-composition { gap:.08em; }
.usage-steps { display:grid; grid-template-columns:1fr 1fr; gap:40px; max-width:600px; margin:auto; }
.usage-steps button { text-align:left; background:none; color:var(--ink-muted); border:0; border-top:1px solid var(--rule); border-radius:0; padding:20px 24px; }
.usage-steps button[aria-pressed="true"] { border-top-color:#DCE6AF; color:var(--ink); }
.usage-steps strong { display:block; font-size:20px; font-weight:500; margin-bottom:6px; }
.usage-steps span { font-size:15px; line-height:1.5; }
.usage-replay { display:block; margin:22px auto 0; padding:10px; min-height:44px; border:0; background:none; color:var(--ink-muted); font-size:13px; text-decoration:underline; text-underline-offset:4px; }
.usage-note { margin:24px auto 0; max-width:78ch; font-size:12px; text-align:center; }
@media(max-width:809px) {
 .usage-guide { padding-block:48px; }
 .usage-heading { grid-template-columns:1fr; gap:20px; }
 .usage-heading h2 { font-size:44px; }
 .usage-heading p { font-size:16px; }
 .usage-stage { height:210px; }
 .usage-composition { font-size:clamp(58px,16vw,90px); }
 .usage-steps { gap:20px; }
 .usage-steps button { padding:16px; }
 .usage-steps strong { font-size:18px; }
 .usage-steps span { font-size:14px; }
}
@media(prefers-reduced-motion:reduce) {
 .usage-composition,.usage-symbol,.usage-amount,.usage-amount>span,.usage-gap { transition:none; }
}