:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}:root{--primary:#ff8c3a;--primary-dark:#e0721f;--accent:#006d77;--surface:#fffdf8;--border:#ffd9a6;--danger:#d93025;--success:#34a853;--text:#111}body{text-align:center;color:var(--text);background:linear-gradient(135deg,#fff3e0,#ffe7c2);min-height:100vh;margin:0;font-family:Arial,sans-serif}.app-title{color:var(--primary-dark);letter-spacing:.3px;margin:24px 0 12px}.app-header{justify-content:center;align-items:center;gap:12px;display:flex}.lang-select{border:1px solid var(--accent);color:#043d44;background:#e6f3f5;border-radius:8px;padding:8px 10px;font-weight:600}.quiz{background:var(--surface);border:2px solid var(--border);border-radius:12px;width:320px;margin:50px auto;padding:20px;box-shadow:0 10px 25px #0000001a}.answer{border:1px solid var(--primary);background:var(--primary);cursor:pointer;color:#241500;border-radius:8px;width:80%;margin:10px auto;padding:10px;font-weight:600;transition:background .2s,border-color .2s,color .2s;display:block}.answer:disabled{opacity:.6;cursor:not-allowed}.answer.correct{border-color:var(--success);color:#0b5d1e;background:#d4f5d4}.answer.wrong{border-color:var(--danger);color:#7f1d1d;background:#ffd9d9}.feedback{margin:8px 0 4px;font-weight:700}.feedback.good{color:#0b5d1e}.feedback.bad{color:#d93025}.question-row h3{color:#111;margin:0 0 8px}.score{color:var(--accent);margin:0 0 12px;font-weight:600}.level{color:#0f3b8f;margin:0 0 12px;font-weight:600}.nav{justify-content:space-between;gap:10px;margin-top:12px;display:flex}.nav-btn{border:1px solid var(--accent);cursor:pointer;color:#043d44;background:#e6f3f5;border-radius:8px;flex:1;padding:10px;font-weight:600}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.restart-btn{border-color:var(--success);color:#0b5d1e;background:#d4f5d4;width:100%;margin-top:10px;font-weight:600}.restart-btn:hover{background:#c3efc3}.nav-btn.danger{border-color:var(--danger);color:#7f1d1d;background:#ffe2e2}.quit-btn{width:100%;margin-top:10px}.cert{gap:8px;margin-top:14px;display:grid}.name-input{box-sizing:border-box;border:1px solid #ccc;border-radius:8px;width:100%;padding:10px}