:root{--bg-primary: #0f172a;--bg-surface: #1e293b;--bg-surface-elevated: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #38bdf8;--accent-focus: #f59e0b;--success: #34d399;--error: #ef4444;--error-bg: rgba(239, 68, 68, .2);--border: #334155;--border-subtle: #1e293b;--key-bg: #1e293b;--key-active-bg: #334155;--key-pressed-bg: #0284c7;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace}[data-theme=light]{--bg-primary: #f8fafc;--bg-surface: #ffffff;--bg-surface-elevated: #f1f5f9;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent: #0284c7;--accent-focus: #d97706;--success: #059669;--error: #dc2626;--error-bg: rgba(220, 38, 38, .15);--border: #e2e8f0;--border-subtle: #f1f5f9;--key-bg: #e2e8f0;--key-active-bg: #cbd5e1;--key-pressed-bg: #38bdf8}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-family);min-height:100vh;display:flex;flex-direction:column}.app-container{max-width:1000px;margin:0 auto;padding:1.5rem 1rem;width:100%}.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;border-bottom:1px solid var(--border);padding-bottom:1rem}.header-left{display:flex;align-items:center;gap:1.5rem}.app-title{font-size:1.4rem;font-weight:700;color:var(--accent)}.nav-links{display:flex;gap:.5rem}.nav-btn{background:transparent;border:1px solid transparent;color:var(--text-secondary);padding:.35rem .75rem;border-radius:6px;cursor:pointer;font-size:.9rem;font-weight:500;transition:all .15s ease}.nav-btn:hover{background:var(--bg-surface);color:var(--text-primary)}.nav-btn.active{background:var(--bg-surface);border-color:var(--border);color:var(--accent)}.status-badge{font-size:.8rem;padding:.2rem .6rem;border-radius:9999px;font-weight:500}.status-loading{background:var(--bg-surface);color:var(--text-secondary);border:1px solid var(--border)}.status-ready{background:#34d39926;color:var(--success);border:1px solid rgba(52,211,153,.3)}.status-error{background:#ef444426;color:var(--error);border:1px solid rgba(239,68,68,.3)}.practice-view{display:flex;flex-direction:column;gap:1.5rem}.alphabet-progression-bar{display:flex;flex-wrap:wrap;gap:.35rem;background:var(--bg-surface);padding:.6rem .8rem;border-radius:8px;border:1px solid var(--border);justify-content:center}.letter-badge{display:flex;flex-direction:column;align-items:center;justify-content:center;width:2.1rem;height:2.5rem;background:var(--bg-primary);border-radius:4px;border:1px solid var(--border);font-size:.85rem;font-weight:600;position:relative}.letter-badge.badge-unlocked{border-color:var(--accent);color:var(--text-primary)}.letter-badge.badge-focus{border-color:var(--accent-focus);background:#f59e0b1f;color:var(--accent-focus)}.letter-badge.badge-locked{opacity:.4;color:var(--text-muted)}.badge-meter{width:80%;height:3px;background:var(--border);border-radius:2px;margin-top:3px;overflow:hidden}.badge-fill{height:100%;background:var(--success)}.badge-lock-icon{font-size:.65rem}.metrics-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.metric-card{background:var(--bg-surface);border:1px solid var(--border);padding:.75rem 1rem;border-radius:8px;text-align:center}.metric-label{display:block;font-size:.75rem;text-transform:uppercase;color:var(--text-secondary);font-weight:600;margin-bottom:.25rem}.metric-value{font-size:1.5rem;font-weight:700;font-family:var(--font-mono)}.text-board-wrapper{position:relative;background:var(--bg-surface);border:2px solid var(--border);border-radius:12px;padding:2.2rem 2rem;min-height:140px;outline:none;cursor:text;transition:border-color .2s ease}.text-board-wrapper:focus{border-color:var(--accent)}.text-board{font-family:var(--font-mono);font-size:1.75rem;line-height:2.4rem;letter-spacing:.05em;word-break:break-word;user-select:none}.text-char{display:inline-block;transition:color .05s ease;position:relative}.char-typed{color:var(--text-muted)}.char-current{color:var(--text-primary);background:#38bdf840;border-bottom:3px solid var(--accent);border-radius:2px 2px 0 0}.char-error{color:var(--error);background:var(--error-bg);border-bottom:3px solid var(--error)}.char-error[data-error]:before{content:attr(data-error);position:absolute;left:50%;top:-.85em;transform:translate(-50%);font-size:.72em;line-height:1;color:var(--error);font-weight:700}.char-remaining{color:var(--text-secondary)}.char-space{opacity:.4}.pause-overlay{position:absolute;inset:0;background:#0f172ad9;backdrop-filter:blur(3px);display:flex;flex-direction:column;justify-content:center;align-items:center;border-radius:10px;cursor:pointer;z-index:10}.pause-overlay h2{font-size:1.5rem;margin-bottom:.5rem;color:var(--accent-focus)}.pause-overlay p{color:var(--text-secondary)}.keyboard-container{display:flex;flex-direction:column;align-items:center;gap:.5rem;background:var(--bg-surface);border:1px solid var(--border);padding:1.25rem;border-radius:12px}.keyboard-finger-hint{font-size:.85rem;font-weight:600;color:var(--accent-focus);min-height:1.2rem}.keyboard-grid{display:flex;flex-direction:column;gap:.4rem;align-items:center;width:100%}.keyboard-row{display:flex;gap:.4rem;justify-content:center;width:100%}.key-cap{width:2.8rem;height:2.8rem;background:var(--key-bg);border:1px solid var(--border);border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.95rem;font-weight:600;color:var(--text-muted);box-shadow:0 2px #0003;user-select:none;transition:all .08s ease}.key-cap.key-unlocked{color:var(--text-primary);background:var(--key-active-bg)}.key-cap.key-focus{border-color:var(--accent-focus);color:var(--accent-focus)}.key-cap.key-expected{background:var(--accent);color:#0f172a;transform:translateY(-2px);box-shadow:0 4px 6px #38bdf84d}.key-cap.key-pressed{background:var(--key-pressed-bg)!important;color:#fff!important;transform:translateY(1px);box-shadow:none}.key-cap.key-space{width:16rem}.summary-overlay{position:fixed;inset:0;background:#000000b3;backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:100}.summary-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:14px;padding:2rem;width:90%;max-width:480px;box-shadow:0 20px 25px -5px #00000080;display:flex;flex-direction:column;gap:1.25rem}.summary-title{font-size:1.5rem;text-align:center;color:var(--accent)}.summary-unlock-banner{background:#f59e0b26;border:1px solid var(--accent-focus);color:var(--accent-focus);padding:.75rem;border-radius:8px;text-align:center;font-weight:600;font-size:.95rem}.summary-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem}.summary-metric{background:var(--bg-primary);border:1px solid var(--border);border-radius:8px;padding:.75rem;text-align:center}.summary-metric .label{display:block;font-size:.7rem;text-transform:uppercase;color:var(--text-secondary)}.summary-metric .value{font-size:1.25rem;font-weight:700;font-family:var(--font-mono)}.summary-save-status{text-align:center;font-size:.85rem;font-weight:500;min-height:1.2rem}.summary-save-status.save-success{color:var(--success)}.summary-save-status.save-failed{color:var(--error);cursor:pointer;text-decoration:underline}.summary-actions{display:flex;gap:.75rem;margin-top:.5rem}.btn{flex:1;padding:.75rem 1rem;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .15s ease}.btn-primary{background:var(--accent);color:#0f172a}.btn-primary:hover{filter:brightness(1.1)}.btn-secondary{background:var(--bg-primary);color:var(--text-primary);border-color:var(--border)}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover{filter:brightness(1.1)}.settings-view{display:flex;flex-direction:column;gap:1.5rem}.settings-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem}.settings-card.danger-zone{border-color:#ef444466}.settings-section-title{font-size:1.25rem;margin-bottom:.5rem;color:var(--text-primary)}.settings-form{display:flex;flex-direction:column;gap:1.25rem;margin-top:1rem}.form-group{display:flex;flex-direction:column;gap:.35rem}.form-label{font-weight:600;font-size:.95rem;color:var(--text-primary)}.form-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.3}.form-input,.form-select{padding:.6rem .8rem;border-radius:6px;border:1px solid var(--border);background:var(--bg-primary);color:var(--text-primary);font-family:inherit;font-size:1rem;max-width:320px}.form-input:focus,.form-select:focus{outline:none;border-color:var(--accent)}.form-actions{display:flex;align-items:center;gap:1rem;margin-top:.5rem}.form-check{display:flex;align-items:center;gap:.5rem}.reset-confirm{margin-top:.75rem;display:flex;flex-wrap:wrap;gap:.5rem}.backup-actions{display:flex;gap:1rem;margin-top:1rem;flex-wrap:wrap}.file-upload-btn{display:inline-flex;align-items:center;justify-content:center}.import-preview{margin-top:1.25rem;background:var(--bg-primary);border:1px solid var(--border);border-radius:8px;padding:1rem}.import-preview h3{font-size:1rem;margin-bottom:.5rem}.preview-actions{display:flex;gap:.75rem;margin-top:1rem}.feedback-msg{font-size:.85rem;font-weight:500;margin-top:.5rem}.msg-success{color:var(--success)}.msg-error{color:var(--error)}.history-view{display:flex;flex-direction:column;gap:1.5rem}.history-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem}.history-card.empty-state{text-align:center;padding:3rem 1.5rem}.history-section-title{font-size:1.25rem;margin-bottom:1rem;color:var(--text-primary)}.history-desc{color:var(--text-secondary)}.chart-wrapper{background:var(--bg-primary);border:1px solid var(--border);border-radius:8px;padding:1rem;overflow-x:auto}.trend-chart-svg{display:block}.table-responsive{overflow-x:auto}.data-table{width:100%;border-collapse:collapse;font-size:.9rem;text-align:left}.data-table th,.data-table td{padding:.65rem .8rem;border-bottom:1px solid var(--border)}.data-table th{color:var(--text-secondary);font-weight:600;text-transform:uppercase;font-size:.75rem;background:var(--bg-primary)}.data-table tr:hover td{background:#ffffff05}.key-badge{display:inline-flex;align-items:center;justify-content:center;width:1.7rem;height:1.7rem;border-radius:4px;background:var(--bg-primary);border:1px solid var(--border);font-family:var(--font-mono);font-weight:700;font-size:.85rem}.key-badge.locked{opacity:.4;border-style:dashed}.confidence-cell{display:flex;align-items:center;gap:.5rem}.conf-val{font-family:var(--font-mono);font-size:.85rem;min-width:2.2rem}.conf-meter{flex:1;max-width:100px;height:6px;background:var(--bg-primary);border-radius:3px;overflow:hidden}.conf-fill{height:100%;background:var(--success)}.pagination-bar{display:flex;justify-content:space-between;align-items:center;margin-top:1rem;padding-top:.5rem}.btn-sm{padding:.4rem .8rem;font-size:.85rem}.pagination-info{font-size:.85rem;color:var(--text-secondary)}.hidden{display:none!important}@media(max-width:640px){.app-container{padding:1rem .75rem}.app-header,.header-left,.nav-links,.form-actions,.backup-actions{flex-wrap:wrap}.app-header{align-items:flex-start;gap:.75rem}.header-left{gap:.75rem;min-width:0}.metrics-bar{grid-template-columns:repeat(2,1fr)}.keyboard-container{padding:.75rem .4rem}.keyboard-row{gap:.2rem}.key-cap{width:auto;flex:1 1 0;min-width:0;height:2.2rem;font-size:.75rem}.key-cap.key-space{flex:4 1 0;width:auto;max-width:100%}.text-board-wrapper{padding:1.25rem .75rem}.text-board{font-size:1.25rem;line-height:1.9rem;letter-spacing:.02em}.summary-card{padding:1.25rem 1rem}.settings-card,.history-card{padding:1rem}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}