.challenge-header-label{font-size:.7rem;font-weight:700;letter-spacing:.15em;color:var(--cyan)}
.challenge-panel{width:calc(100% - 2rem);max-width:540px;margin:3rem auto;padding:2rem;border:1px solid #7654a3;border-radius:24px;background:linear-gradient(150deg,#291644,#1b102e);box-shadow:inset 0 1px #ffffff18,0 5px 0 #09051966,0 20px 65px #0003}
.challenge-icon{display:block;border-radius:20px;box-shadow:0 5px 18px #0005;margin-bottom:1.25rem}
.challenge-panel h1{font-size:2.5rem;max-width:none;margin-bottom:.6rem;letter-spacing:-.06em}.challenge-panel h1 span{color:var(--pink)}
.challenge-panel h2{font-size:1.25rem;margin:0 0 1rem;color:var(--cyan)}
#intro{color:var(--muted);font-size:.95rem}form,#actions{display:grid;gap:12px;margin-block:24px}[hidden]{display:none!important}
label{font-size:.85rem;font-weight:700}input{width:100%;min-width:0;min-height:50px;border:1px solid #8764ae;border-radius:12px;padding:12px;background:#110929;color:#f8f4ff;font:16px/1.5 monospace;box-shadow:inset 0 2px 5px #0004}input::placeholder{color:#ad99c8}
button,.challenge-panel .button{display:block;width:100%;text-align:center;border:1px solid #8ffff0;border-radius:12px;padding:14px;background:linear-gradient(135deg,#00efd6,#24b8ff);color:#110929;font:700 16px/1.4 system-ui;text-decoration:none;min-height:50px;cursor:pointer;box-shadow:inset 0 1px #ffffff88,0 4px 0 #087e9d}
button:hover,.challenge-panel .button:hover{background:#6affed}.challenge-panel .secondary,#copy{background:#301b4c;color:#f0e3ff;border-color:#8764ae;box-shadow:0 3px 0 #110929}
#target{font-size:1.65rem;font-weight:700;color:var(--cyan);overflow-wrap:anywhere}#target:not(:empty){padding:1rem;border:1px solid #00efd655;border-radius:12px;background:#00efd60a}
#note,#instructions{font-size:.82rem;color:var(--muted)}#feedback{color:#ffafd9;overflow-wrap:anywhere}#home{display:inline-flex;align-items:center;min-height:44px;font-size:.85rem;font-weight:700}
@media(max-width:600px){.challenge-panel{margin:1.5rem auto;padding:1.35rem}.challenge-panel h1{font-size:2.1rem}.challenge-icon{width:68px;height:68px}}

/* Keep the install action subdued and readable on hover. */
.challenge-panel .button.secondary:hover{background:#41265f;color:#f0e3ff;border-color:#a582ca;box-shadow:0 3px 0 #110929}