:root{--bg:#f4f7fb;--card:#fff;--ink:#172033;--muted:#667085;--primary:#3157d5;--danger:#c93636;--border:#dfe5ef}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:Arial,PingFang SC,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}.container{width:min(1080px,100% - 28px);margin:0 auto}.topbar{color:#fff;background:#172033;padding:14px 0}.topbar-inner{flex-wrap:wrap;align-items:center;gap:18px;display:flex}.topbar nav{flex-wrap:wrap;flex:1;gap:14px;display:flex}.topbar button{color:#fff;background:0 0;border:1px solid #6d7891;border-radius:8px;padding:6px 10px}.page{padding:28px 0 60px}.grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;display:grid}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 5px 20px #2030520d}.card h2,.card h3{margin-top:0}.metric{color:var(--primary);font-size:32px;font-weight:700}.muted{color:var(--muted)}.stack{gap:12px;display:grid}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.form-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;display:grid}input,textarea,select{border:1px solid var(--border);background:#fff;border-radius:9px;width:100%;padding:10px 12px}textarea{resize:vertical;min-height:100px}.btn{background:var(--primary);color:#fff;border:0;border-radius:9px;padding:10px 15px;font-weight:600;display:inline-block}.btn.secondary{color:var(--primary);background:#e8edfb}.btn.danger{background:var(--danger)}.btn.easy{background:#1b8754}.btn.good{background:#3157d5}.btn.hard{background:#d58a22}.btn.again{background:#c93636}.error{color:var(--danger)}.success{color:#167047}.list{gap:10px;display:grid}.list-item{border:1px solid var(--border);background:#fff;border-radius:12px;padding:14px}.login{place-items:center;min-height:100vh;padding:20px;display:grid}.login .card{width:min(420px,100%)}.word-card{text-align:center;padding:32px 20px}.word-card .word{margin:8px 0;font-size:clamp(38px,8vw,64px);font-weight:800}.options{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.option{border:1px solid var(--border);background:#fff;border-radius:10px;padding:14px}.option.correct{background:#eaf8f1;border-color:#1b8754}.option.wrong{background:#fff0f0;border-color:#c93636}.dictionary-search{gap:10px;display:flex}.dictionary-search input{flex:1}.dictionary-entry h2{margin:0}.dictionary-entry .pronounce{margin-left:auto}.dictionary-entry section{border-top:1px solid var(--border);padding-top:14px}.dictionary-entry li{margin-bottom:10px}.dictionary-example{margin-top:4px;font-style:italic}.dictionary-lines{white-space:pre-line}.dictionary-suggestion{border:1px solid var(--border);color:var(--primary);background:#fff;border-radius:8px;padding:6px 10px}.dictionary-sources a{color:var(--primary);text-decoration:underline}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--border);text-align:left;padding:10px}@media (max-width:600px){.options{grid-template-columns:1fr}.dictionary-search{flex-direction:column;align-items:stretch}.page{padding-top:18px}table{display:block;overflow-x:auto}}