/* 따라 하기 — 아이폰 한 대가 실제 화면을 한 장씩 넘기며 누를 자리를 짚는다. MIXnFIT 계단의 폰과 같은 몸체.
   색은 사이트가 --ht-* 로 넘긴다. 원본 tools/howto/, 사이트에는 복사본. */
.ht{--ht-ink:#141311;--ht-muted:#6d6a62;--ht-line:rgba(0,0,0,.12);--ht-accent:#FF3B5C;--ht-on-accent:#fff;--ht-card:rgba(255,255,255,.55);--ht-ring:#FF2E6E;
  color:var(--ht-ink);background:var(--ht-bg,transparent);word-break:keep-all;padding-block:clamp(56px,8vw,104px);padding-inline:clamp(16px,4vw,40px)}
.ht,.ht *{box-sizing:border-box}
.ht-in{width:min(1080px,100%);margin-inline:auto;display:grid;gap:clamp(24px,4vw,44px)}
.ht-head{display:grid;gap:10px;max-width:640px}
.ht-eye{margin:0;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ht-accent)}
.ht-head h2{margin:0;font-size:clamp(26px,4.4vw,44px);line-height:1.12;letter-spacing:-.02em;text-wrap:balance}
.ht-sub{margin:0;font-size:15px;line-height:1.65;color:var(--ht-muted)}
.ht-body{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(20px,5vw,64px);align-items:center}

/* 폰 — 390×844 화면을 그대로 담는다 */
.ht-phone{position:relative;width:var(--ht-w,300px);aspect-ratio:390/844;border-radius:calc(var(--ht-w,300px)*.15);padding:calc(var(--ht-w,300px)*.034);
  background:linear-gradient(145deg,#2A2733,#0D0C11);box-shadow:0 40px 90px -34px rgba(0,0,0,.45),inset 0 0 0 1px rgba(255,255,255,.08);flex:none}
.ht-scr{position:relative;width:100%;height:100%;border-radius:calc(var(--ht-w,300px)*.118);overflow:hidden;background:#111;isolation:isolate}
.ht-shot{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .55s ease;display:block}
.ht-shot.is-on{opacity:1}
.ht-island{position:absolute;top:calc(var(--ht-w,300px)*.058);left:50%;width:30%;height:calc(var(--ht-w,300px)*.07);transform:translateX(-50%);border-radius:99px;background:#050505;z-index:3}
.ht-ex{position:absolute;right:8px;bottom:10px;z-index:3;padding:4px 9px;border-radius:99px;font-size:11px;font-weight:700;letter-spacing:.02em;background:rgba(0,0,0,.62);color:#fff;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);opacity:0;transition:opacity .3s}
.ht-ex.is-on{opacity:1}

/* 누를 자리 — 동그라미가 두 번 울린다 */
.ht-tap{position:absolute;z-index:2;width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;pointer-events:none;opacity:0;
  border:3px solid var(--ht-ring);box-shadow:0 0 0 4px rgba(255,255,255,.55),0 6px 18px rgba(0,0,0,.35);transition:left .45s ease,top .45s ease,opacity .25s}
.ht-tap::after{content:"";position:absolute;inset:-3px;border-radius:50%;border:3px solid var(--ht-ring);opacity:0}
.ht-tap.is-on{opacity:1}
.ht-tap.is-on::after{animation:ht-ping 1.2s ease-out .25s 2}
@keyframes ht-ping{0%{transform:scale(1);opacity:.85}100%{transform:scale(2.1);opacity:0}}

/* 단계 목록 */
.ht-steps{list-style:none;margin:0;padding:0;display:grid;gap:4px;min-width:0;counter-reset:ht}
.ht-step{display:grid;grid-template-columns:30px minmax(0,1fr);gap:4px 12px;width:100%;padding:14px 14px 15px;border:0;border-radius:14px;background:transparent;color:inherit;font:inherit;text-align:left;cursor:pointer;position:relative;overflow:hidden}
.ht-step:hover{background:var(--ht-card)}
.ht-step:focus-visible{outline:2px solid var(--ht-accent);outline-offset:2px}
.ht-no{grid-row:span 2;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;border:1.5px solid var(--ht-line);color:var(--ht-muted)}
.ht-t{font-size:16px;font-weight:800;line-height:1.35;align-self:center}
.ht-d{font-size:14px;line-height:1.6;color:var(--ht-muted);display:none}
.ht-step[aria-current="step"]{background:var(--ht-card)}
.ht-step[aria-current="step"] .ht-no{background:var(--ht-accent);border-color:var(--ht-accent);color:var(--ht-on-accent)}
.ht-step[aria-current="step"] .ht-d{display:block}
.ht-step.is-done .ht-no{color:var(--ht-ink);border-color:var(--ht-ink)}
.ht-bar{position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;background:var(--ht-line);overflow:hidden;opacity:0}
.ht-bar i{display:block;height:100%;width:100%;background:var(--ht-accent);transform:scaleX(0);transform-origin:0 50%}
.ht-step[aria-current="step"] .ht-bar{opacity:1}
.ht.is-run .ht-step[aria-current="step"] .ht-bar i{animation:ht-fill var(--ht-dur,3800ms) linear forwards}
@keyframes ht-fill{to{transform:scaleX(1)}}

.ht-foot{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:6px;padding-left:4px}
.ht-go{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;background:var(--ht-accent);color:var(--ht-on-accent);font-weight:800;font-size:15px;text-decoration:none}
.ht-go:focus-visible,.ht-play:focus-visible{outline:2px solid var(--ht-ink);outline-offset:3px}
.ht-play{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:999px;border:1px solid var(--ht-line);background:transparent;color:var(--ht-muted);font:inherit;font-size:13px;cursor:pointer}
.ht-cap{display:none;margin:0}
.ht-note{flex-basis:100%;margin:0;font-size:12.5px;line-height:1.6;color:var(--ht-muted)}

@media (max-width:720px){
  .ht-body{grid-template-columns:minmax(0,56%) minmax(0,1fr);gap:12px;align-items:center}
  .ht-side{display:contents}
  .ht-cap{display:block;grid-column:1/-1;min-height:4.8em;padding:12px 14px;border-radius:12px;background:var(--ht-card);font-size:14px;line-height:1.6;color:var(--ht-muted)}
  .ht-cap b{color:var(--ht-ink);font-weight:800}
  .ht-foot{grid-column:1/-1;margin-top:0;padding-left:0}
  .ht-phone{--ht-w:min(56vw,250px);width:100%;max-width:250px;justify-self:center}
  .ht-steps{gap:2px}
  .ht-step{grid-template-columns:22px minmax(0,1fr);gap:0 8px;padding:9px 6px 11px;align-items:center}
  .ht-no{grid-row:auto;width:22px;height:22px;font-size:11px}
  .ht-t{font-size:13.5px;line-height:1.3}
  .ht-step .ht-d,.ht-step[aria-current="step"] .ht-d{display:none}
  .ht-bar{left:6px;right:6px;bottom:3px}
  .ht-tap{width:34px;height:34px;margin:-17px 0 0 -17px;border-width:2.5px}
}
@media (prefers-reduced-motion:reduce){
  .ht-shot,.ht-tap{transition:none}
  .ht-tap.is-on::after,.ht.is-run .ht-step[aria-current="step"] .ht-bar i{animation:none}
}