@import url(https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=DM+Sans:wght@300;400;500;600;700&display=swap);body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.home-screen{align-items:center;display:flex;flex-direction:column;justify-content:center;min-height:100vh;padding:2rem;position:relative}.header-nav{position:absolute;right:2rem;top:2rem}.user-menu{align-items:center;display:flex;gap:1rem}.user-email{color:var(--muted);font-family:DM Mono,monospace;font-size:.85rem}.login-nav-btn,.logout-btn{background:#fff;border:2px solid var(--border);color:var(--fg);cursor:pointer;font-family:DM Sans,sans-serif;font-size:.85rem;font-weight:600;padding:8px 16px;transition:all .12s ease}.login-nav-btn:hover,.logout-btn:hover{background:var(--fg);box-shadow:2px 2px 0 #000;color:var(--bg);transform:translate(-2px,-2px)}.home-inner{max-width:640px;text-align:center;width:100%}.badge{border:2px solid #000;display:inline-block;font-family:DM Mono,monospace;font-size:11px;letter-spacing:2px;margin-bottom:2rem;padding:4px 14px;text-transform:uppercase}h1{font-size:clamp(2.2rem,6vw,3.5rem);font-weight:700;letter-spacing:-1.5px;line-height:1.05;margin-bottom:1rem}.subtitle{color:var(--muted);font-size:1rem;font-weight:400;margin-bottom:2rem}.premium-btn{background:var(--fg);border:2px solid var(--border);color:var(--bg);cursor:pointer;display:inline-block;font-family:DM Sans,sans-serif;font-size:1rem;font-weight:600;margin-bottom:1rem;padding:16px 24px;transition:all .12s ease}.premium-btn:hover{background:#fff;box-shadow:var(--card-shadow);color:#000;transform:translate(-2px,-2px)}.premium-active-badge{border:2px solid var(--correct);color:var(--correct);display:inline-block;font-family:DM Mono,monospace;font-size:.9rem;font-weight:500;margin-bottom:1rem;padding:10px 20px}.divider{border:none;border-top:2px solid #000;margin:2rem 0}.section-label{color:var(--muted);font-family:DM Mono,monospace;font-size:10px;letter-spacing:3px;margin-bottom:1rem;text-align:left;text-transform:uppercase}.mode-grid{grid-gap:12px;display:grid;gap:12px;grid-template-columns:1fr 1fr 1fr;margin-bottom:12px}.mode-btn{background:#fff;border:2px solid #000;cursor:pointer;font-family:DM Sans,sans-serif;font-size:.9rem;font-weight:600;overflow:hidden;padding:18px 12px;position:relative;transition:all .12s ease}.mode-btn:hover{background:#000;box-shadow:var(--card-shadow);color:#fff;transform:translate(-2px,-2px)}.mode-btn .num{display:block;font-family:DM Mono,monospace;font-size:1.5rem;font-weight:500;margin-bottom:4px}.mode-btn .lbl{color:inherit;font-size:.75rem;font-weight:400;opacity:.7}.full-btn{background:#000;border:2px solid #000;color:#fff;cursor:pointer;font-family:DM Sans,sans-serif;font-size:.95rem;font-weight:600;letter-spacing:.5px;padding:16px;transition:all .12s;width:100%}.full-btn:hover{background:#fff;color:#000}.stats-row{color:var(--muted);display:flex;font-family:DM Mono,monospace;font-size:12px;gap:1rem;justify-content:center;margin-top:2rem}@media(max-width:520px){.mode-grid{grid-template-columns:1fr 1fr}}.cert-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-top:2rem}.cert-box{background:#fff;border:2px solid #000;display:flex;flex-direction:column;overflow:hidden;padding:24px;position:relative;text-align:left;transition:all .15s ease}.cert-box:hover{box-shadow:4px 4px 0 #000;transform:translate(-4px,-4px)}.cert-box.paid{border-color:#10b981;border-color:var(--correct,#10b981)}.cert-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:8px}.cert-header h2{font-size:1.5rem;letter-spacing:-.5px;margin:0}.cert-q-count{background:#f0f0f0;border-radius:4px;font-family:DM Mono,monospace;font-size:.8rem;padding:4px 8px}.cert-name{color:var(--muted);flex-grow:1;font-size:.95rem;margin-bottom:24px}.cert-action-btn{border:2px solid #000;cursor:pointer;font-family:DM Sans,sans-serif;font-size:.9rem;font-weight:600;padding:12px;transition:all .12s ease;width:100%}.unlock-btn{background:#fff;color:#000}.unlock-btn:hover{background:#000;color:#fff}.continue-btn{background:#10b981;background:var(--correct,#10b981);border-color:#10b981;border-color:var(--correct,#10b981);color:#fff}.continue-btn:hover{opacity:.9}.back-btn{background:none;border:none;color:var(--muted);cursor:pointer;font-family:DM Sans,sans-serif;font-size:.9rem;margin-bottom:2rem;text-align:left;width:100%}.back-btn:hover{color:#000;text-decoration:underline}.quiz-container{margin:0 auto;max-width:800px;min-height:100vh;padding:1.5rem}.quiz-topbar{align-items:center;border-bottom:2px solid #000;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-bottom:2rem;padding-bottom:1rem}.quiz-topbar>*{flex-shrink:0}.quiz-back{background:#fff;border:2px solid #000;cursor:pointer;font-family:DM Mono,monospace;font-size:11px;letter-spacing:1px;padding:8px 16px;transition:all .12s}.quiz-back:hover{background:#000;color:#fff}.progress-wrap{flex:1 1;margin:0 auto;max-width:300px;min-width:200px;order:3}@media (min-width:600px){.progress-wrap{margin:0 1.5rem;order:0}}.progress-label{color:var(--muted);display:flex;font-family:DM Mono,monospace;font-size:11px;justify-content:space-between;margin-bottom:6px}.progress-bar{background:#e5e5e5;height:4px;overflow:hidden;position:relative}.progress-fill{background:#000;height:100%;transition:width .4s cubic-bezier(.4,0,.2,1)}.score-chip{border:1.5px solid #000;font-family:DM Mono,monospace;font-size:12px;padding:4px 10px;white-space:nowrap}.q-card{animation:fadeUp .25s ease both;border:2px solid #000;margin-bottom:1.5rem;padding:2rem;position:relative}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.q-num{color:var(--muted);font-family:DM Mono,monospace;font-size:11px;letter-spacing:2px;margin-bottom:1rem;text-transform:uppercase}.q-text{font-size:1.05rem;font-weight:500;line-height:1.65;margin-bottom:2rem}.options{display:flex;flex-direction:column;gap:10px}.option{align-items:flex-start;background:#fff;border:2px solid #000;cursor:pointer;display:flex;font-family:DM 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1;font-family:DM Sans,sans-serif;font-size:.95rem;font-weight:600;height:46px;justify-content:center;margin-top:0;max-width:160px;padding:0 24px;transition:all .12s}.submit-btn:hover{background:#333}.submit-btn.visible{display:block}.action-buttons{align-items:stretch;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:12px}.clear-btn,.submit-btn{box-sizing:border-box;height:46px}.clear-btn{align-items:center;background:#fff;border:2px solid #666;color:#666;cursor:pointer;display:inline-flex;flex:1 1;font-family:DM Sans,sans-serif;font-size:.95rem;font-weight:600;justify-content:center;max-width:160px;padding:0 20px;transition:all .12s}.clear-btn:hover{background:#f5f5f5;border-color:#333;color:#333}.ai-toggle-btn{background:#fff;border:2px solid #4f46e5;color:#4f46e5;cursor:pointer;display:block;font-family:DM Sans,sans-serif;font-size:.95rem;font-weight:600;margin-top:1.5rem;padding:14px;transition:all .12s;width:100%}.ai-toggle-btn:hover{background:#4f46e5;color:#fff}.ai-box{animation:fadeUp .3s ease both;border:2px solid #000;display:none;margin-top:1.5rem}.ai-box.visible{display:block}.ai-header{align-items:center;background:#000;color:#fff;display:flex;font-family:DM Mono,monospace;font-size:11px;gap:10px;letter-spacing:2px;padding:10px 18px;text-transform:uppercase}.ai-dot{animation:pulse 1.4s infinite;background:#4ade80;border-radius:50%;height:8px;width:8px}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}.ai-body{color:#222;font-size:.9rem;line-height:1.7;padding:1.5rem}.ai-body strong{font-weight:700}.ai-loading{align-items:center;color:var(--muted);display:flex;font-family:DM Mono,monospace;font-size:12px;gap:10px}.spinner{animation:spin .7s linear infinite;border:2px solid #ddd;border-radius:50%;border-top-color:#000;height:16px;width:16px}@keyframes spin{to{transform:rotate(1turn)}}.next-btn{background:#fff;border:2px solid #000;box-sizing:border-box;color:#000;cursor:pointer;font-family:DM Sans,sans-serif;font-size:.9rem;font-weight:600;height:44px;margin-top:.5rem;padding:12px 16px;transition:all .12s}.next-btn:hover{background:#000;color:#fff}.next-btn.hidden{display:none}.nav-buttons{align-items:center;display:flex;flex-wrap:wrap;gap:10px;margin-top:.5rem}.nav-buttons button{flex:1 1;min-width:120px}.prev-btn{background:#fff;border:2px solid #000;box-sizing:border-box;color:#000;cursor:pointer;flex:1 1;font-family:DM Sans,sans-serif;font-size:.9rem;font-weight:600;height:44px;padding:12px 16px;transition:all .12s}.prev-btn:hover:not(:disabled){background:#000;color:#fff}.prev-btn.hidden{display:none}.prev-btn:disabled{cursor:not-allowed;opacity:.5}.loading{align-items:center;color:var(--muted);display:flex;font-family:DM Mono,monospace;justify-content:center;min-height:100vh}@media(max-width:520px){.quiz-topbar{flex-wrap:wrap;gap:10px}.progress-wrap{flex:0 0 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.divider{border:none;border-top:2px solid var(--border);margin:2rem 0}.login-desc{color:var(--muted);line-height:1.6;margin-bottom:2.5rem}.auth-btn,.login-desc{font-family:DM Sans,sans-serif;font-size:1rem}.auth-btn{align-items:center;background:var(--bg);border:2px solid var(--border);color:var(--fg);cursor:pointer;display:inline-flex;font-weight:600;gap:12px;justify-content:center;letter-spacing:.5px;margin:0 auto;max-width:320px;padding:16px;transition:all .12s ease;width:100%}.auth-btn:hover{background:var(--fg);box-shadow:var(--card-shadow);color:var(--bg);transform:translate(-2px,-2px)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#fff;--fg:#000;--border:#000;--muted:#666;--accent:#000;--correct:#16a34a;--wrong:#dc2626;--highlight:#f5f5f5;--card-shadow:4px 4px 0px #000}html{scroll-behavior:smooth}body{background:#fff;background:var(--bg);color:#000;color:var(--fg);font-family:DM Sans,sans-serif;overflow-x:hidden}.App,body{min-height:100vh}
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