:root{--text:#2b2b2b;--text-muted:#6b6b6b;--bg:#fff;--card-bg:#f7f6fb;--border:#e3e1e8;--accent:#5b4de0;--accent-text:#fff;--correct:#1f9d55;--wrong:#d0342c;--hard-bg:#fff3ea;--hard-text:#b3591b;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font:18px/145% system-ui,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--text:#f0f0f0;--text-muted:#b5b5b5;--bg:#16171d;--card-bg:#212230;--border:#34364a;--accent:#8c7dff;--accent-text:#10111a;--correct:#4ade80;--wrong:#ff6b6b;--hard-bg:#3a2a1a;--hard-text:#ffb27a}}*{box-sizing:border-box}body{margin:0}#root{flex-direction:column;min-height:100svh;display:flex}button{font:inherit}.app{flex-direction:column;flex:1;min-height:100svh;display:flex}.lang-bar{border-bottom:1px solid var(--border);justify-content:center;gap:.5rem;padding:.6rem 1rem;display:flex}.lang-button{border:1px solid var(--border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:999px;padding:.3rem .9rem;font-size:.85rem}.lang-button.active{border-color:var(--accent);color:var(--accent);font-weight:700}.screen{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:1.25rem;width:100%;max-width:480px;margin:0 auto;padding:1.5rem 1.25rem 6rem;display:flex}.screen h1{margin:0;font-size:1.75rem}.subtitle{color:var(--text-muted);margin:0}.stat-list{gap:.75rem;width:100%;display:flex}.stat-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;flex-direction:column;flex:1;gap:.25rem;padding:1rem .5rem;display:flex}.stat-hard{background:var(--hard-bg);color:var(--hard-text)}.stat-value{font-size:1.75rem;font-weight:700}.stat-label{color:inherit;font-size:.85rem}.primary-button{background:var(--accent);width:100%;color:var(--accent-text);cursor:pointer;border:none;border-radius:12px;padding:1rem;font-size:1.1rem;font-weight:600}.primary-button:disabled{opacity:.5;cursor:default}.progress-list{flex-direction:column;gap:.75rem;width:100%;display:flex}.progress-row{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;justify-content:space-between;align-items:center;padding:.9rem 1.1rem;font-size:1rem;display:flex}.progress-hard strong{color:var(--hard-text)}.source-note{color:var(--text-muted);font-size:.75rem;line-height:1.5}.tab-bar{border-top:1px solid var(--border);background:var(--bg);display:flex;position:fixed;bottom:0;left:0;right:0}.tab-button{color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex:1;padding:1rem 0;font-size:1rem}.tab-button.active{color:var(--accent);font-weight:700}.flashcard-header{justify-content:space-between;align-items:center;width:100%;display:flex}.text-button{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:.5rem;font-size:1rem}.flashcard-progress{color:var(--text-muted);font-size:.95rem}.card{background:var(--card-bg);border:1px solid var(--border);cursor:pointer;border-radius:20px;flex-direction:column;justify-content:center;align-items:center;gap:1rem;width:100%;min-height:320px;padding:2rem 1.5rem;display:flex}.card-word{margin:0;font-size:2.75rem;font-weight:700}.card-hint{color:var(--text-muted);margin:0;font-size:.9rem}.card-back{flex-direction:column;gap:.5rem;display:flex}.card-pos{color:var(--text-muted);margin:0;font-size:.9rem}.card-meaning{margin:0;font-size:1.3rem;font-weight:600}.card-example-ko{margin:0;font-size:1.05rem}.card-example-en{color:var(--text-muted);margin:0;font-size:.95rem}.answer-buttons{gap:.75rem;width:100%;min-height:3.5rem;display:flex}.answer-buttons.placeholder{visibility:hidden}.answer-button{cursor:pointer;color:#fff;border:none;border-radius:12px;flex:1;padding:1rem;font-size:1.1rem;font-weight:600}.answer-button.wrong{background:var(--wrong)}.answer-button.correct{background:var(--correct)}