:root{--font-display:"Bricolage Grotesque", system-ui, sans-serif;--font-body:"Atkinson Hyperlegible", system-ui, sans-serif;--font-mono:"JetBrains Mono", ui-monospace, monospace;--ink:#1d2433;--ink-soft:#566074;--paper:#eef0f3;--surface:#fff;--rule:#d5dae2;--accent:#b9832a;--correct:#2f9e5b;--wrong:#d0453b;--partial:#c98a1b;--board-light:#dde3ea;--board-dark:#7d90a6;--board-frame:#2b3446;--coord-on-light:#7d90a6;--coord-on-dark:#dde3ea;--hl-from:#e6b64661;--hl-to:#f0b228c7;--hl-wrong:#d0453b99;--hl-hint:#2f7de1;--hl-select:#2f7de173;--move-dot:#1d243347;--radius:10px;--shadow:0 1px 2px #141c2d14, 0 8px 24px #141c2d14}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--ink:#e4e8ef;--ink-soft:#9aa5b8;--paper:#141a24;--surface:#1d2532;--rule:#2e3849;--accent:#e0aa4c;--board-frame:#0c1018;--move-dot:#1d243366;--shadow:0 1px 2px #0000004d, 0 8px 24px #0000004d}}*,:before,:after{box-sizing:border-box}html{background:var(--paper);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.5}body{background:var(--paper);flex-direction:column;min-height:100vh;margin:0;display:flex}h1,h2,h3{font-family:var(--font-display);letter-spacing:-.01em;margin:0 0 .4em;line-height:1.15}h1{font-size:clamp(1.7rem,4vw,2.4rem);font-weight:750}h2{font-size:1.25rem;font-weight:700}a{color:inherit;-webkit-text-decoration-color:var(--accent);text-decoration-color:var(--accent);text-underline-offset:3px}a:hover{color:var(--accent)}:focus-visible{outline:3px solid var(--hl-hint);outline-offset:2px}.site-header{border-bottom:1px solid var(--rule);justify-content:space-between;align-items:center;gap:1rem;padding:.75rem clamp(16px,4vw,40px);display:flex}.brand{font-family:var(--font-display);align-items:center;gap:.5rem;font-size:1.15rem;font-weight:750;text-decoration:none;display:inline-flex}.brand-mark{width:30px;height:30px}.site-user{align-items:center;gap:.9rem;font-size:.95rem;display:flex}.site-username{color:var(--ink-soft)}.site-main{flex:1;width:100%}.site-footer{color:var(--ink-soft);border-top:1px solid var(--rule);padding:1.25rem clamp(16px,4vw,40px);font-size:.85rem}.page{max-width:1040px;margin:0 auto;padding:clamp(1.25rem,4vw,2.5rem) clamp(16px,4vw,40px)}.page.narrow{max-width:440px}.lede{color:var(--ink-soft);margin:0 0 1.5rem}.stack{font-size:.8rem;overflow-x:auto}.button{border:1px solid var(--rule);background:var(--surface);min-height:44px;color:var(--ink);font:inherit;cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:.4rem;padding:.55rem 1.2rem;font-weight:700;text-decoration:none;transition:border-color .12s,background .12s;display:inline-flex}.button:hover:not(:disabled){border-color:var(--ink-soft);color:var(--ink)}.button:disabled{opacity:.45;cursor:default}.button-primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}.button-primary:hover:not(:disabled){background:var(--ink-soft);border-color:var(--ink-soft);color:var(--paper)}.link-button{font:inherit;color:inherit;text-decoration:underline;-webkit-text-decoration-color:var(--accent);text-decoration-color:var(--accent);text-underline-offset:3px;cursor:pointer;background:0 0;border:none;padding:0}.form{gap:1rem;margin-top:1.25rem;display:grid}.field{gap:.3rem;font-size:.95rem;font-weight:700;display:grid}.field input{font:inherit;border:1px solid var(--rule);background:var(--surface);color:var(--ink);border-radius:8px;min-height:44px;padding:.6rem .75rem;font-weight:400}.field-error{color:var(--wrong);font-size:.88rem;font-weight:400}.form-error{background:color-mix(in srgb, var(--wrong) 12%, transparent);color:var(--wrong);border-radius:8px;padding:.7rem .9rem}.form-switch{color:var(--ink-soft);margin-top:1.25rem}.crumbs{justify-content:space-between;gap:1rem;max-width:1040px;margin:0 auto;padding:1rem clamp(16px,4vw,40px) 0;font-size:.9rem;display:flex}.crumbs a{color:var(--ink-soft)}.trainer-save-error{max-width:1040px;margin:0 auto 1rem}