#piano-lessons{width:min(1010px,calc(100% - 24px));max-height:calc(100svh - 24px);overflow:auto;background:#f5ead0;color:#24463a;border:1px solid #c3a866;border-radius:20px}#piano-lessons::backdrop{background:#082b26d9;backdrop-filter:blur(5px)}.p-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;background:#173d34;color:#ffedbf;position:sticky;top:0;z-index:10;font:18px Georgia}.p-nav button{min-height:44px;padding:10px 14px;border:1px solid #d6c08470;border-radius:24px;background:transparent;color:inherit;font:14px system-ui}.p-content{padding:18px 28px 24px;background:radial-gradient(ellipse at top,#fff8e5,#eadaba)}.p-heading{text-align:center;margin:0 0 14px}.p-heading .eyebrow{color:#8e703c;margin-bottom:8px}.p-heading h1{font-size:32px;line-height:1.15;margin:0}.p-room{position:relative;width:min(100%,720px,calc(max(200px,100svh - 350px) * 1.5));aspect-ratio:3/2;margin:auto;border-radius:14px;overflow:hidden;box-shadow:0 8px 26px #674c2933;background:#ab7343}.p-room>img{width:100%;height:100%;display:block}.p-speech{position:absolute;left:4%;top:5%;width:42%;box-sizing:border-box;padding:15px 18px;background:#fff9eaf2;border:1px solid #b59655;border-radius:18px;box-shadow:0 5px 16px #493e3133}.p-speech p{font:22px/1.35 Georgia;margin:12px 0 0;color:#34563e}.p-speech .name-badge{font-size:12px;padding:4px 10px}.p-guide,.p-ending{text-align:center;font:14px/1.5 system-ui;color:#536b51;max-width:730px;margin:15px auto}.p-small{text-align:center;font:12px/1.5 system-ui;color:#6c735d;margin:10px 0 0}.p-primary,.p-finish{display:block;margin:14px auto 0;min-height:48px;background:#1c5545;color:#ffefbc;border:1px solid #75996f;border-radius:26px;padding:12px 24px;font:600 15px system-ui;cursor:pointer}.p-finish:disabled{opacity:.5;cursor:wait}.p-turn{text-align:center;border-radius:18px;background:#e8efcf;color:#36583d;font:600 14px system-ui;max-width:740px;margin:14px auto 10px;padding:9px}.p-keyboard{position:relative;display:grid;grid-template-columns:repeat(8,1fr);max-width:740px;margin:auto;padding:12px 12px 0;background:#70482d;border:2px solid #56381f;border-radius:10px;box-shadow:0 5px 15px #492e2833}.p-key{position:relative;min-width:0;height:125px;border:1px solid #b3a180;border-radius:0 0 6px 6px;box-shadow:inset 0 -5px 0 #d8cdb6;background:linear-gradient(#fffbea,#eee5d2);color:#455846;padding:60px 0 8px;font:600 17px Georgia;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px}.p-key small{font:11px system-ui;color:#7e806b}.p-key:disabled{opacity:1;cursor:default}.p-key.lit{background:#fbe083;box-shadow:inset 0 -5px 0 #a9bd79,inset 0 0 22px #f0b759;border:2px solid #3e7952;color:#254737}.p-key.lit:after{content:'●';position:absolute;top:55%;left:50%;transform:translate(-50%,-50%);font:14px Georgia;color:#2a694b}.p-black-keys{position:absolute;inset:12px 12px auto;height:58px;pointer-events:none}.p-black-keys i{position:absolute;top:0;width:7%;height:100%;background:linear-gradient(90deg,#242b25,#454939,#161f1a);border-radius:0 0 4px 4px;box-shadow:0 3px 3px #41301b66}.p-black-keys i:nth-child(1){left:9%}.p-black-keys i:nth-child(2){left:21.5%}.p-black-keys i:nth-child(3){left:46.5%}.p-black-keys i:nth-child(4){left:59%}.p-black-keys i:nth-child(5){left:71.5%}.p-friendship{position:relative;width:min(100%,740px,calc(max(200px,100svh - 310px) * 1.5));aspect-ratio:3/2;margin:auto;border-radius:14px;overflow:hidden;background:radial-gradient(ellipse at 15% 20%,#fffce5 0,transparent 36%),linear-gradient(#a1cbd4,#dcebea 68%,#f2e9c9);box-shadow:0 8px 26px #674c2933}.p-friendship:before,.p-friendship:after{content:'';position:absolute;top:15%;left:8%;width:38%;height:10%;background:#fffdf7a8;filter:blur(10px);border-radius:50%}.p-friendship:after{top:32%;left:58%;width:30%}.p-friend-pair{position:absolute;inset:15% 0 10%;animation:p-float 8s ease-in-out forwards}.p-friend{position:absolute;top:0;width:50%;height:100%;background-image:url('assets/era2-piano-john-eddie-highfive.svg');background-size:200% 100%;background-repeat:no-repeat;filter:drop-shadow(0 5px 4px #56634a33)}.p-friend.john{left:0;background-position:left center;animation:p-john-arrive 1.7s ease-out forwards}.p-friend.eddie{right:0;background-position:right center;animation:p-eddie-arrive 1.7s ease-out forwards}.p-friend-name{position:absolute;bottom:-4%;background:#133f36;color:#ffedb5;border:1px solid #e0c57b;border-radius:22px;padding:6px 16px;font:600 13px system-ui}.p-friend-name.john{left:23%}.p-friend-name.eddie{right:20%}.p-highfive{position:absolute;top:22%;left:48%;font-size:38px;color:#fff6be;opacity:0;animation:p-spark 8s ease-out forwards}.p-ending{color:#345d45;font-weight:600}.p-nav button:focus-visible,.p-primary:focus-visible,.p-finish:focus-visible,.p-key:focus-visible{outline:3px solid #3e8663;outline-offset:3px;z-index:5}@keyframes p-john-arrive{from{transform:translateX(-120%)}to{transform:translateX(1.4%)}}@keyframes p-eddie-arrive{from{transform:translateX(120%)}to{transform:translateX(-1.4%)}}@keyframes p-float{0%,58.75%{transform:translateY(0);opacity:1}82%{transform:translateY(-70%);opacity:.8}100%{transform:translateY(-145%);opacity:0}}@keyframes p-spark{0%,20%{opacity:0;transform:scale(.3)}21.25%,27%{opacity:1;transform:scale(1.15)}32%,100%{opacity:0;transform:scale(1.8)}}@media(max-width:650px){.p-nav{padding:10px 12px}.p-nav>span{display:none}.p-content{padding:16px}.p-heading h1{font-size:26px}.p-room{width:100%;aspect-ratio:auto;overflow:visible;background:transparent;box-shadow:none}.p-room>img{height:auto;border-radius:14px}.p-speech{position:relative;left:auto;top:auto;width:auto;margin-top:12px;padding:12px 16px;box-shadow:none}.p-speech p{font-size:20px;margin-top:9px}.p-keyboard{padding:8px 6px 0}.p-key{height:110px;font-size:14px}.p-key small{font-size:10px}.p-black-keys{top:8px;left:6px;right:6px;height:49px}.p-guide{font-size:13px}.p-friend-name{font-size:10px;padding:4px 9px}.p-friendship{width:min(100%,calc(max(180px,100svh - 300px) * 1.5))}.p-highfive{font-size:26px}}@media(prefers-reduced-motion:reduce){.p-friend-pair,.p-friend,.p-highfive{animation:none!important}.p-friend.john{transform:translateX(1.4%)}.p-friend.eddie{transform:translateX(-1.4%)}.p-highfive{opacity:1}}
/* Keep the playable keys and turn cue together on compact screens. */
.p-room.lesson-room{width:min(100%,560px,calc(max(130px,100svh - 420px) * 1.5))}.lesson-room .p-speech{display:none}@media(max-width:650px){.p-room.lesson-room{width:100%;height:clamp(120px,23svh,180px);overflow:hidden;border-radius:14px}.p-room.lesson-room>img{height:100%;object-fit:cover;object-position:50% 23%}.p-key{height:105px}}