:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f7f9fc;--surface:#fff;--surface-muted:#eef4fb;--border:#d8e2ef;--text:#172033;--muted:#64748b;--accent:#2563eb;--danger:#dc2626;--shadow:0 14px 35px #0f172a14}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0f172a;--surface:#172033;--surface-muted:#1e293b;--border:#334155;--text:#e2e8f0;--muted:#94a3b8;--accent:#60a5fa;--danger:#f87171;--shadow:0 14px 35px #00000038}*{box-sizing:border-box}body{background:radial-gradient(circle at top left, #2563eb1f, transparent 32rem), var(--bg);min-width:320px;min-height:100vh;color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,select{font:inherit}button{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:8px;transition:border-color .18s,background .18s,transform .18s}button:hover:not(:disabled),a.icon-action:hover{border-color:var(--accent);transform:translateY(-1px)}button:disabled{cursor:not-allowed;opacity:.55}.app-shell{width:min(1120px,100vw - 32px);margin:0 auto;padding:32px 0 48px}.hero{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:20px;display:flex}.hero h1{letter-spacing:0;margin:0;font-size:clamp(2.2rem,6vw,4.8rem);line-height:.95}.hero p{max-width:620px;color:var(--muted);margin:10px 0 0;font-size:1.05rem}.eyebrow{letter-spacing:.08em;text-transform:uppercase;font-weight:800;color:var(--accent)!important;margin-bottom:10px!important;font-size:.78rem!important}.header-actions{gap:10px;display:flex}.icon-action{border:1px solid var(--border);background:var(--surface);width:48px;height:48px;color:var(--text);box-shadow:var(--shadow);border-radius:8px;justify-content:center;align-items:center;font-weight:800;text-decoration:none;display:inline-flex}.top-icon{fill:none;stroke:currentColor;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;width:22px;height:22px}.top-icon.fill-icon{fill:currentColor;stroke:none}.score-card,.practice-panel,.side-panel,.settings-panel{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:8px}.score-card{justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;padding:16px 18px;display:flex}.score-card div{align-items:baseline;gap:10px;display:flex}.score-card span,.score-card small{color:var(--muted)}.score-card strong{font-size:2rem}.trainer-layout{grid-template-columns:minmax(0,1.45fr) minmax(320px,.8fr);gap:18px;display:grid}.practice-panel,.side-panel{padding:18px}.side-panel{flex-direction:column;gap:14px;display:flex}.staff-shell{border:1px solid var(--border);background:var(--surface-muted);border-radius:8px;overflow:hidden}.staff-canvas{overscroll-behavior-x:contain;justify-content:flex-start;align-items:center;min-height:150px;padding:12px;display:flex;overflow-x:auto}.staff-canvas svg{flex:none;width:auto;min-width:100%;height:auto;display:block}.staff-canvas p,.inline-error,.inline-message,.hotkey-prompt{color:var(--muted);margin:0}.inline-error{color:var(--danger);padding:0 14px 14px}.answer-grid{grid-template-columns:repeat(7,minmax(58px,1fr));gap:10px;margin-top:16px;display:grid}.note-button{flex-direction:column;justify-content:center;align-items:center;gap:4px;min-height:76px;padding:10px;font-weight:800;display:flex}.note-button span{font-size:1.25rem}.note-button small,kbd{color:var(--muted)}.range-controls{border:1px solid var(--border);background:linear-gradient(180deg, var(--surface), var(--surface-muted));border-radius:8px;gap:14px;padding:14px;display:grid}.range-heading{color:var(--muted);justify-content:space-between;align-items:center;gap:12px;display:flex}.range-heading strong{color:var(--text)}.range-buttons{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.range-buttons button,.primary-action,.secondary-action,.hotkey-row button{min-height:42px;padding:8px 12px;font-weight:700}.range-step{text-align:left;background:var(--surface);grid-template-columns:34px minmax(0,1fr);align-items:center;gap:8px;display:grid}.range-step:hover:not(:disabled){background:color-mix(in srgb, var(--accent) 9%, var(--surface))}.step-icon{background:color-mix(in srgb, var(--accent) 13%, transparent);width:30px;height:30px;color:var(--accent);border-radius:8px;justify-content:center;align-items:center;display:inline-flex}.step-icon svg{fill:none;stroke:currentColor;stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round;width:19px;height:19px}.settings-section{margin-top:18px}.primary-action,.secondary-action{background:var(--accent);border-color:var(--accent);color:#fff}.settings-panel{gap:18px;margin-top:12px;padding:18px;display:grid}.field-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.field-grid label{color:var(--muted);gap:8px;font-weight:700;display:grid}select{border:1px solid var(--border);background:var(--surface-muted);min-height:42px;color:var(--text);border-radius:8px;padding:0 12px}.hotkeys-panel{gap:12px;display:grid}.panel-title{font-weight:800}.hotkey-list{gap:8px;display:grid}.hotkey-row{border:1px solid var(--border);border-radius:8px;grid-template-columns:48px minmax(72px,1fr) auto auto;align-items:center;gap:8px;padding:8px;display:grid}kbd{background:var(--surface-muted);border-radius:6px;align-items:center;min-height:32px;padding:0 10px;font-family:inherit;font-weight:800;display:inline-flex}@media (width<=820px){.app-shell{width:min(100vw - 20px,680px);padding-top:18px}.hero,.score-card{flex-direction:column;align-items:stretch}.trainer-layout,.field-grid{grid-template-columns:1fr}.answer-grid{grid-template-columns:repeat(4,minmax(62px,1fr))}}@media (width<=480px){.practice-panel,.side-panel,.settings-panel{padding:12px}.answer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hotkey-row{grid-template-columns:42px 1fr}}