.tutorial-entry{display:inline-flex;align-items:center;gap:.65rem;color:#263f9d;font-weight:650;text-decoration:none;padding:.65rem 0;line-height:1.4}
.tutorial-entry:hover{text-decoration:underline}.tutorial-play-icon{display:inline-grid;place-items:center;width:2rem;height:2rem;border:1px solid #b9ccee;border-radius:50%;font-size:.75rem;flex:none}
.tutorial-entry small{font-weight:400;color:#57647c}.tutorial-help{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin:0 0 1.25rem;padding:.8rem 1.2rem;border:1px solid #cadcf1;border-radius:16px;background:#f4f8ff}.tutorial-help p{margin:0;color:#354764}.tutorial-help a{padding:.2rem 0}
.tutorial-dialog{width:min(1100px,calc(100vw - 32px));max-width:1100px;max-height:92dvh;padding:0;border:0;border-radius:22px;background:#fff;color:#142640;box-shadow:0 24px 100px #07172c66;overflow:auto}.tutorial-dialog::backdrop{background:#0b1b35bb}
.tutorial-dialog .tutorial-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.4rem;background:#fff;border-bottom:1px solid #e5ebf4}
.tutorial-head h2{font-size:1.25rem;margin:0}.tutorial-head button{flex:none;width:44px;height:44px;display:grid;place-items:center;border:1px solid #d3dff0;border-radius:50%;background:#fff;color:#142640;font-size:1.7rem;cursor:pointer}
.tutorial-player{padding:1.4rem}.tutorial-kicker{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:#405b9d;font-weight:700}.tutorial-meta{color:#586983;margin:0 0 1rem;font-size:.95rem}.tutorial-video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#142640;border-radius:12px;object-fit:contain}.tutorial-player video::cue{font-family:Arial,sans-serif;font-size:85%}
.tutorial-chapters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.55rem;list-style:none;padding:0;margin:.8rem 0 1.2rem}.tutorial-chapters li{min-width:0}.tutorial-chapters button{width:100%;min-height:48px;display:flex;align-items:center;gap:.7rem;padding:.7rem .85rem;text-align:left;font:inherit;font-size:.9rem;color:#263c60;background:#f4f7fc;border:1px solid #dfe7f3;border-radius:10px;cursor:pointer}.tutorial-chapters button:hover,.tutorial-chapters button[aria-current=true]{background:#e9f0ff;border-color:#8ba6e3}.tutorial-chapters time{font-variant-numeric:tabular-nums;color:#395ac0;font-size:.8rem;flex:none}.tutorial-player h3{font-size:1rem;margin:1.4rem 0 .65rem}.tutorial-status{color:#89441e}.tutorial-status:empty{display:none}.tutorial-player details{border-top:1px solid #e3eaf4;padding:1rem 0;color:#52627c;font-size:.9rem}.tutorial-player summary{cursor:pointer;font-weight:600}.tutorial-player details p,.tutorial-player details li{line-height:1.65}.tutorial-player a{color:#2c49ad}
.tutorial-page{max-width:1120px;margin:auto;padding:2.5rem 1.25rem 4rem;color:#142640}.tutorial-page h1{font-size:clamp(2rem,5vw,3.4rem);letter-spacing:-.04em;line-height:1.15;margin:.4rem 0 1rem}.tutorial-page-intro{max-width:680px;color:#52627c;line-height:1.7}.tutorial-page .tutorial-player{margin-top:1.7rem;background:#fff;border:1px solid #dce6f3;border-radius:20px;box-shadow:0 18px 60px #1d39700b}.tutorial-page .tutorial-bottom{display:flex;justify-content:center;margin-top:2rem}
.tutorial-entry:focus-visible,.tutorial-player button:focus-visible,.tutorial-head button:focus-visible,.tutorial-player summary:focus-visible{outline:3px solid #2c49cc;outline-offset:4px}
@media(max-width:720px){.tutorial-chapters{grid-template-columns:repeat(2,minmax(0,1fr))}.tutorial-dialog{width:calc(100vw - 16px);max-height:96dvh;border-radius:15px}.tutorial-player{padding:1rem}.tutorial-dialog .tutorial-head{padding:.8rem 1rem}.tutorial-head h2{font-size:1.05rem}.tutorial-entry{flex-wrap:wrap}.tutorial-entry small{font-size:.8rem}.tutorial-page{padding:1.5rem .75rem 3rem}.tutorial-help{padding:.8rem 1rem}}
@media(max-width:390px){.tutorial-chapters{grid-template-columns:1fr}.tutorial-help{gap:.4rem}}