:root{--plate: #1f4f8f;--plate-edge: #ffffff;--plate-ink: #ffffff;--ink: #18202e;--muted: #5a6476;--paper: #eef1f5;--surface: #ffffff;--line: #d6dce5;--soft: #e3e8ef;--red: #c8102e;--red-soft: #fbe9ec;--green: #1c7449;--green-soft: #e5f3eb;--amber: #8a5a00;--amber-soft: #fbf1dc;--focus: #f2b705;--link: #1f4f8f;--on-plate: #ffffff;--radius-plate: 7px;--radius: 12px;--body: "Fira Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--cond: "Fira Sans Condensed", "Fira Sans", system-ui, sans-serif;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--plate: #2b64ad;--plate-edge: #dfe7f2;--ink: #e7ecf3;--muted: #9aa6b8;--paper: #0f1520;--surface: #182131;--line: #2b3648;--soft: #222d40;--red: #ff6b7d;--red-soft: #3a1c24;--green: #5fd393;--green-soft: #15301f;--amber: #f0c060;--amber-soft: #352a12;--link: #8db8f0;color-scheme:dark}}:root[data-theme=dark]{--plate: #2b64ad;--plate-edge: #dfe7f2;--ink: #e7ecf3;--muted: #9aa6b8;--paper: #0f1520;--surface: #182131;--line: #2b3648;--soft: #222d40;--red: #ff6b7d;--red-soft: #3a1c24;--green: #5fd393;--green-soft: #15301f;--amber: #f0c060;--amber-soft: #352a12;--link: #8db8f0;color-scheme:dark}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.5 var(--body)}a{color:var(--link)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}h1,h2{line-height:1.2;margin:0 0 .5em}h1{font-size:1.6rem;font-weight:600}h2{font-size:1.15rem;font-weight:600}p{margin:0 0 .8em}.app{min-height:100vh;padding-bottom:calc(72px + env(safe-area-inset-bottom))}.screen{max-width:560px;margin:0 auto;padding-block:20px 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var(--cond);margin-bottom:6px}.streak{color:var(--green);font-weight:500;margin:0}.review-cta{margin-bottom:28px}.lessons{list-style:none;margin:0;padding:0;display:grid;gap:22px}.lesson-link{display:flex;align-items:center;gap:10px;text-decoration:none}.lesson-link:hover .plate,.lesson-link:hover .house-no{filter:brightness(1.12)}.lesson-sub{margin:6px 0 0 62px;color:var(--muted);font-size:.92rem}.done-mark{color:var(--green)}.lesson-head{display:flex;align-items:center;gap:10px;margin:6px 0 18px}.lesson-head .plate{font-size:1.5rem}.back{display:inline-block;margin-bottom:12px;font-size:.95rem}.tabs{display:flex;gap:4px;padding:4px;background:var(--soft);border-radius:var(--radius);margin-bottom:20px}.tab{flex:1;border:0;background:transparent;color:var(--muted);padding:9px 4px;border-radius:9px;font:500 .92rem var(--body);cursor:pointer}.tab[aria-selected=true]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px #0000001f}.grammar{margin-bottom:28px}.grammar 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var(--link)}.badge{position:absolute;top:2px;right:calc(50% - 48px);min-width:20px;height:20px;padding:0 6px;border-radius:10px;background:var(--red);color:var(--on-plate);font-size:.72rem;line-height:20px;text-align:center}@media (prefers-reduced-motion: reduce){*{transition:none!important}}.confirm{padding:12px 14px;border-radius:var(--radius);background:var(--red-soft)}.confirm p{margin-bottom:4px}