:root{--k1frx-bg: #0f1720;--k1frx-surface: #16212c;--k1frx-accent: #2a6f97;--k1frx-accent-warm: #b5480a;--k1frx-text: #e8eef3;--k1frx-muted: #9fb2c0;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--k1frx-bg);color:var(--k1frx-text)}.app{min-height:100%;display:flex;flex-direction:column;max-width:720px;margin:0 auto}.app__header{padding:1rem 1.25rem .5rem}.app__title{margin:0;font-size:1.25rem;letter-spacing:.02em}.app__tagline{margin:.25rem 0 0;color:var(--k1frx-muted);font-size:.85rem}.app__notice{margin-top:.75rem;padding:.75rem;border-radius:10px;border:1px solid rgba(230,192,122,.5);background:#e6c07a1a}.app__notice p{margin:0}.app__notice button{margin-top:.5rem}.app__main{flex:1;padding:1rem 1.25rem}.app__nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;padding:.5rem 1.25rem calc(.5rem + env(safe-area-inset-bottom));position:sticky;bottom:0;background:var(--k1frx-surface);border-top:1px solid rgba(255,255,255,.08)}.app__nav a{min-width:0;text-align:center;padding:.75rem .5rem;min-height:2.75rem;border-radius:8px;color:var(--k1frx-muted);text-decoration:none;font-weight:600;font-size:.95rem}.app__nav a.is-active{color:#fff;background:var(--k1frx-accent)}@media(max-width:420px){.app__nav{gap:.2rem;padding-left:.5rem;padding-right:.5rem}.app__nav a{padding-left:.1rem;padding-right:.1rem;font-size:.72rem}}@media(min-width:640px){.app__nav{position:static}}button{font:inherit;cursor:pointer;color:#fff;background:var(--k1frx-accent);border:none;border-radius:8px;padding:.65rem 1rem;min-height:2.75rem;font-weight:600}button:disabled{opacity:.4;cursor:not-allowed}select,input[type=text],textarea{font:inherit;color:var(--k1frx-text);background:var(--k1frx-surface);border:1px solid rgba(255,255,255,.15);border-radius:8px;padding:.6rem .7rem;min-height:2.75rem}.field{display:flex;flex-direction:column;gap:.35rem;margin:.75rem 0}.field__label{color:var(--k1frx-muted);font-size:.85rem}.tabs{display:flex;gap:.5rem;margin:.75rem 0 1rem}.tab{flex:1;background:var(--k1frx-surface);color:var(--k1frx-muted)}.tab.is-active{background:var(--k1frx-accent);color:#fff}.practice__controls{display:flex;flex-wrap:wrap;gap:.5rem;margin:.75rem 0}.retry-actions button{flex:1 1 12rem;min-height:44px}.practice__answer{display:flex;gap:.5rem;margin:.75rem 0}.practice__answer input{flex:1;text-transform:uppercase}.imported-rx{display:grid;gap:.35rem}.imported-rx__input{min-height:10rem;resize:vertical;line-height:1.5}.feedback{font-weight:600;margin:.5rem 0}.feedback--ok{color:#6ee7a8}.feedback--bad{color:#f2a17c}.send__target{display:flex;flex-direction:column;align-items:center;gap:.25rem;margin:1rem 0}.send__target-label{color:var(--k1frx-muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.08em}.send__target-char{font-size:3.5rem;font-weight:700;line-height:1}.send__key{display:block;width:100%;min-height:8rem;font-size:1.25rem;background:var(--k1frx-accent-warm);touch-action:none;-webkit-user-select:none;user-select:none}.send__key:active{filter:brightness(1.2)}.send__hint{color:var(--k1frx-muted);font-size:.85rem;text-align:center}.send__decoded{display:flex;flex-direction:column;gap:.25rem;margin:.75rem 0}.send__decoded-text{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.5rem;letter-spacing:.15em;min-height:2rem}.settings__note{color:var(--k1frx-muted);font-size:.85rem;margin-top:1rem}.learn__top{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.learn__bar{flex:1;height:8px;border-radius:4px;background:#ffffff1a;overflow:hidden}.learn__bar span{display:block;height:100%;background:var(--k1frx-accent);transition:width .3s ease}.learn__intro{display:flex;flex-direction:column;align-items:center;gap:.5rem;margin:1rem 0}.learn__dashboard{display:grid;gap:.35rem;margin:.75rem 0 1rem}.learn__onboarding-primary{margin-bottom:1rem}.learn__character-map{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:.5rem;margin:.75rem 0 1rem}.learn__character-tile{display:grid;justify-items:center;gap:.2rem;padding:.45rem .35rem;min-height:6.5rem;background:var(--k1frx-surface);color:var(--k1frx-text);border:1px solid rgba(255,255,255,.14)}.learn__character-tile[aria-pressed=true]{border-color:var(--k1frx-accent)}.learn__character-ring{width:2.7rem;height:2.7rem;border-radius:999px;display:inline-flex;align-items:center;justify-content:center}.learn__character-fill{width:1.95rem;height:1.95rem;border-radius:999px;background:var(--k1frx-surface);border:1px solid rgba(255,255,255,.08);display:inline-flex;align-items:center;justify-content:center}.learn__character-symbol{font-weight:700;font-size:1.1rem}.learn__character-level{text-align:center;line-height:1.15}.learn__character-detail{padding:.5rem;border-radius:10px;border:1px solid rgba(255,255,255,.12);background:#ffffff08}.learn__character-detail--inline{grid-column:1 / -1}.learn__character-detail:focus{outline:2px solid var(--k1frx-accent);outline-offset:2px}.learn__morse{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.25rem;letter-spacing:.15em;color:var(--k1frx-accent-warm)}.learn__answer{display:block;width:100%;text-align:center;text-transform:uppercase;font-size:1.5rem;letter-spacing:.15em;margin:.75rem 0}.learn__continuous-answer{display:block;width:100%;min-height:10rem;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.15rem;line-height:1.6;text-transform:uppercase;margin:.75rem 0}.learn__assist{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.75rem;margin:.5rem 0;border-radius:10px;background:#b5480a1f;border:1px solid rgba(181,72,10,.35)}.learn__assist-char{font-size:2.5rem;font-weight:700;line-height:1}.learn__feedback{min-height:2.5rem;display:flex;align-items:center;justify-content:center;margin:.5rem 0}.learn__mark{font-size:2rem;color:#6ee7a8;animation:k1frx-pop .3s ease}@keyframes k1frx-pop{0%{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}.feedback--neutral{color:#e6c07a;font-weight:600}.learn__end{margin-top:1.5rem;justify-content:flex-end}.summary{line-height:1.9;padding-left:1.1rem}.stats__note{color:var(--k1frx-muted);margin:.25rem 0 .75rem}.stats__empty{color:var(--k1frx-muted);background:#ffffff0a;border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:.75rem}.stats__summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem;margin:.75rem 0 1rem}.stats__card{margin:0;border:1px solid rgba(255,255,255,.1);border-radius:10px;background:#ffffff08;padding:.65rem .75rem}.stats__card h3{margin:0;font-size:.8rem;color:var(--k1frx-muted);letter-spacing:.03em;text-transform:uppercase}.stats__card p{margin:.4rem 0 0;font-size:1.1rem;font-weight:700}.stats__list{list-style:none;margin:.5rem 0 1rem;padding:0;display:grid;gap:.5rem}.stats__list-row{display:grid;gap:.2rem;border:1px solid rgba(255,255,255,.1);border-radius:10px;background:#ffffff08;padding:.6rem .75rem}.stats__list-row strong{font-size:.95rem}.stats__list-row span{color:var(--k1frx-muted);font-size:.84rem}@media(max-width:420px){.stats__summary-grid{grid-template-columns:1fr}}