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var(--border);background:#fff;border-radius:16px;justify-content:center;padding:12px;display:flex}.ab-compare-container{text-align:center;background:#6366f10d;border:1.5px dashed #6366f14d;border-radius:16px;padding:18px}.ab-instruction{color:var(--purple);margin:0 0 12px;font-size:14px;font-weight:700}.ab-buttons{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.ab-btn{background:var(--card-bg);border:1.5px solid var(--border);color:var(--text-h);border-radius:12px;padding:10px 20px;font-weight:700;transition:all .15s}.ab-btn:hover{border-color:var(--purple)}.ab-btn.active{background:var(--purple);border-color:var(--purple);color:#fff}.secret-choices{flex-direction:column;gap:10px;display:flex}.secret-choice-btn{text-align:left;background:var(--bg);border:2px solid var(--border);width:100%;color:var(--text-h);border-radius:16px;padding:16px 20px;font-size:16px;font-weight:700;transition:all .15s}.secret-choice-btn:hover:not(:disabled){border-color:var(--purple);transform:translate(3px)}.secret-choice-btn.selected{border-color:var(--purple);background:#6366f11a}.secret-choice-btn.correct-reveal{border-color:var(--green);color:var(--green-dark);background:#10b9811f}.secret-choice-btn.incorrect-reveal{border-color:var(--red);color:var(--red-dark);background:#ef44441f}.secret-choice-btn.muted-reveal{opacity:.5}.reveal-explanation-box{background:var(--bg);border:2px solid var(--border);border-radius:20px;flex-direction:column;gap:14px;padding:24px;animation:.3s ease-out slideUp;display:flex}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.reveal-heading-row{justify-content:flex-start;display:flex}.status-label{border-radius:6px;padding:4px 10px;font-size:13px;font-weight:800}.status-label.success{color:var(--green-dark);background:#10b98126}.status-label.info{color:var(--purple);background:#6366f126}.explanation-text{opacity:.95;margin:0;font-size:15px;line-height:1.6}.hear-illustration-btn{background:var(--card-bg);border:1.5px solid var(--border);border-radius:10px;align-self:flex-start;padding:8px 16px;font-size:13px;font-weight:700}.hear-illustration-btn:hover{border-color:var(--purple)}.btn-next-secret{background:var(--purple);color:#fff;border-radius:12px;margin-top:10px;padding:14px;font-size:15px;font-weight:800}.pack-completed-box{background:var(--card-bg);border:2px solid var(--border);text-align:center;box-shadow:var(--shadow);border-radius:28px;flex-direction:column;align-items:center;gap:16px;padding:50px 30px;display:flex}.trophy-emoji{font-size:72px;animation:1.5s ease-in-out infinite alternate bounce}.pack-completed-box h2{color:var(--text-h);margin:0;font-size:32px}.pack-completed-box p{opacity:.8;margin:0 0 10px;font-size:16px}.btn-done{background:var(--purple);color:#fff;border-radius:14px;padding:12px 30px;font-weight:800}.app-footer{background:var(--card-bg);border-top:2px solid var(--border);margin-top:60px;padding:50px 20px 0}.footer-container{grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;max-width:1200px;margin:0 auto;padding-bottom:40px;display:grid}.footer-col{flex-direction:column;gap:12px;display:flex}.footer-brand{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;width:fit-content;display:flex}.footer-tagline{opacity:.8;max-width:320px;margin:0;font-size:14px;line-height:1.5}.footer-badges{flex-wrap:wrap;gap:8px;margin-top:4px;display:flex}.footer-badge{color:var(--purple);background:#6366f11a;border-radius:8px;padding:4px 10px;font-size:12px;font-weight:700}.footer-heading{color:var(--text-h);margin:0 0 4px;font-size:16px;font-weight:800}.footer-links{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.footer-link-btn{color:var(--text);opacity:.8;cursor:pointer;text-align:left;background:0 0;border:none;padding:0;font-family:inherit;font-size:14px;text-decoration:none;transition:all .15s}.footer-link-btn:hover{opacity:1;color:var(--purple);transform:translate(2px)}.footer-contact-text{opacity:.8;margin:0;font-size:14px;line-height:1.4}.footer-email-link{background:var(--purple);color:#fff;border-radius:12px;align-items:center;gap:8px;width:fit-content;margin-top:4px;padding:10px 18px;font-size:14px;font-weight:800;text-decoration:none;transition:background .15s;display:inline-flex}.footer-email-link:hover{background:var(--purple-dark)}.footer-bottom{border-top:1.5px solid var(--border);opacity:.75;padding:20px 0;font-size:13px}.footer-bottom-container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;max-width:1200px;margin:0 auto;display:flex}@media (width<=768px){.footer-container{grid-template-columns:1fr 1fr}}@media (width<=640px){.app-main{padding:12px 12px 60px}.nav-grade-links{display:none}.hero-headline{font-size:32px}.grade-cards-grid,.features-grid-section{grid-template-columns:1fr}}