:root{--bg: #FAFAFA;--bg-secondary: #F5F5F5;--text: #1A1A1A;--text-secondary: #555;--accent: #D4637A;--correct: #43A047;--wrong: #E53935;--muted: #888;--border: #E0E0E0;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.08)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}.container{max-width:640px;margin:0 auto;padding:2rem 1.25rem 4rem}.header{text-align:center;margin-bottom:1.5rem}.header h1{font-size:1.75rem;font-weight:800;letter-spacing:-.02em;color:var(--accent)}.header p{color:var(--muted);font-size:.875rem;margin-top:.25rem}.header-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.header-row h1{font-size:1.5rem;margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.375rem;padding:.625rem 1.25rem;border-radius:var(--radius);font-size:.9375rem;font-weight:600;cursor:pointer;border:none;transition:opacity .15s,background .15s,box-shadow .15s;white-space:nowrap}.btn:hover{opacity:.85}.btn:active{opacity:.7}.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow)}.btn-secondary{background:#fff;color:var(--text);border:1px solid var(--border)}.btn-ghost{background:transparent;color:var(--muted);border:none;font-size:.875rem;padding:.375rem .5rem}.btn-ghost:hover{color:var(--text);opacity:1}.btn-sm{font-size:.8125rem;padding:.375rem .75rem}.btn:disabled{opacity:.5;cursor:not-allowed}.tab-bar{display:flex;gap:.5rem;margin-bottom:1.5rem;background:var(--bg-secondary);border-radius:var(--radius);padding:.25rem}.tab-btn{flex:1;padding:.5rem 1rem;border:none;border-radius:6px;font-size:.875rem;font-weight:600;cursor:pointer;background:transparent;color:var(--muted);transition:background .15s,color .15s,box-shadow .15s}.tab-btn.active{background:#fff;color:var(--accent);box-shadow:0 1px 3px #0000001a}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1rem;box-shadow:var(--shadow)}.card-title{font-size:.75rem;font-weight:700;margin-bottom:1rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.form-group{margin-bottom:1rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.75rem}label:not(.checkbox-label){display:block;font-size:.75rem;font-weight:600;color:var(--muted);margin-bottom:.375rem;text-transform:uppercase;letter-spacing:.05em}input,select{width:100%;padding:.625rem .875rem;border:1.5px solid var(--border);border-radius:6px;font-size:.9375rem;font-family:inherit;background:#fff;color:var(--text);transition:border-color .15s;-webkit-appearance:none;-moz-appearance:none;appearance:none}input:focus,select:focus{outline:none;border-color:var(--accent)}input::placeholder{color:#bbb}select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23888'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center;padding-right:2rem}.checkbox-group{display:flex;gap:1.25rem;flex-wrap:wrap}.checkbox-label{display:flex!important;align-items:center;gap:.5rem;cursor:pointer;font-size:.9375rem;font-weight:500;color:var(--text);text-transform:none;letter-spacing:0;margin-bottom:0}.checkbox-label input[type=checkbox]{width:1rem;height:1rem;accent-color:var(--accent);cursor:pointer}.error-msg{background:#fff5f5;color:var(--wrong);padding:.75rem 1rem;border-radius:var(--radius);font-size:.875rem;margin-bottom:1rem;border:1px solid #FFDAD9}.success-msg{background:#f0faf0;color:var(--correct);padding:.75rem 1rem;border-radius:var(--radius);font-size:.875rem;margin-bottom:1rem;font-weight:500;border:1px solid #D4F5D4}.success-msg strong{font-weight:700}.progress-bar-wrap{margin-bottom:1rem}.progress-bar-track{height:4px;background:var(--border);border-radius:2px;overflow:hidden}.progress-bar-fill{height:4px;background:var(--accent);border-radius:2px;transition:width .3s ease}.progress-bar-label{font-size:.75rem;color:var(--muted);margin-bottom:.25rem;text-align:right;font-weight:600}.verb-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:.75rem;box-shadow:var(--shadow)}.verb-card.is-filled{border-color:var(--correct)}.verb-card-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:.25rem;gap:.5rem}.verb-num{font-size:.75rem;font-weight:700;color:var(--muted);white-space:nowrap}.verb-base{font-size:1.25rem;font-weight:800;color:var(--text)}.verb-meaning{color:var(--muted);font-size:.875rem;flex:1;text-align:right}.answer-row{display:grid;gap:.75rem;margin-top:.75rem}.answer-row.cols-2{grid-template-columns:1fr 1fr}.answer-row.cols-3{grid-template-columns:1fr 1fr 1fr}.answer-input{padding:.75rem;font-size:1rem;border:1.5px solid var(--border);border-radius:6px;text-align:center;font-weight:600;letter-spacing:.02em;width:100%;transition:border-color .15s,background .15s}.answer-input.filled{border-color:var(--correct);background:#f8fff8}.answer-input:focus{border-color:var(--accent);outline:none;background:#fff}.answer-label{font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:.25rem;display:block}.result-correct{color:var(--correct);font-weight:700;font-size:1rem}.result-wrong{color:var(--wrong);font-weight:700;font-size:1rem}.result-wrong .correct-answer{color:var(--correct);font-weight:400;font-size:.875rem;margin-left:.5rem}.score-display{font-size:3rem;font-weight:800;text-align:center;color:var(--accent);margin:.5rem 0;line-height:1}.score-max{font-size:1.25rem;font-weight:600;color:var(--muted)}.score-display-wrap{text-align:center;padding:1.5rem}.test-item{display:flex;align-items:center;justify-content:space-between;padding:1rem 0;border-bottom:1px solid var(--border);gap:1rem}.test-item:last-child{border-bottom:none}.test-item-info{flex:1;min-width:0}.test-item-label{font-weight:700;font-size:.9375rem;margin-bottom:.125rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.test-item-meta{color:var(--muted);font-size:.8125rem}.test-item-actions{display:flex;gap:.5rem;align-items:center;flex-shrink:0}.badge{display:inline-flex;align-items:center;padding:.2rem .5rem;border-radius:20px;font-size:.75rem;font-weight:700}.badge-open{background:#e8f5e9;color:var(--correct)}.badge-closed{background:var(--bg-secondary);color:var(--muted)}.stats-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:1.5rem}.stat-card{background:var(--bg-secondary);border-radius:var(--radius);padding:1rem;text-align:center}.stat-value{font-size:2rem;font-weight:800;color:var(--accent);line-height:1}.stat-label{color:var(--muted);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-top:.25rem}.student-row{display:flex;justify-content:space-between;align-items:center;padding:.625rem 0;border-bottom:1px solid var(--border)}.student-row:last-child{border-bottom:none}.student-name{font-weight:600;font-size:.9375rem}.student-class{color:var(--muted);font-size:.8125rem;margin-left:.5rem}.score-pill{font-weight:800;font-size:.9375rem}.mistake-row{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid var(--border);font-size:.875rem}.mistake-row:last-child{border-bottom:none}.mistake-verb{font-weight:600}.mistake-count{color:var(--wrong);font-weight:700}.empty-state{text-align:center;padding:2.5rem 1rem;color:var(--muted);font-size:.9375rem}.empty-state-icon{font-size:2rem;margin-bottom:.5rem;opacity:.4}.loading{text-align:center;color:var(--muted);padding:2rem;font-size:.9375rem}.footer-nav{text-align:center;margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border)}.password-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.password-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:2rem;width:100%;max-width:400px;box-shadow:0 4px 20px #00000014}.password-logo{text-align:center;margin-bottom:1.5rem}.password-logo h1{font-size:1.5rem;font-weight:800;color:var(--accent)}.password-logo p{color:var(--muted);font-size:.875rem;margin-top:.25rem}@media print{body{background:#fff}.btn,.footer-nav,.tab-bar,.header-row button{display:none!important}.container{padding:1rem 0;max-width:100%}.card{box-shadow:none;border:1px solid #CCC;page-break-inside:avoid;margin-bottom:.75rem}.verb-card{box-shadow:none;border:1px solid #CCC;page-break-inside:avoid}.result-correct{color:#2e7d32!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}.result-wrong{color:#c62828!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}.score-display{color:#1a1a1a!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}h1{color:#1a1a1a!important}}@media (max-width: 480px){.form-row{grid-template-columns:1fr}.form-row-3,.answer-row.cols-3{grid-template-columns:1fr 1fr}.test-item{flex-direction:column;align-items:flex-start}.test-item-actions{width:100%;justify-content:flex-end}}