.cards-wrapper{max-width:1400px;margin:0 auto;padding:20px}.category-filter{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:40px}.category-btn{padding:10px 28px;border:2px solid #e8edf5;border-radius:50px;background:transparent;font-size:14px;font-weight:600;color:#6b7280;cursor:pointer;transition:all .3s ease;font-family:inherit}.category-btn:hover{border-color:#667eea;color:#667eea;transform:translateY(-2px);box-shadow:0 4px 15px #667eea26}.category-btn.active{background:linear-gradient(135deg,#667eea,#764ba2);border-color:transparent;color:#fff;box-shadow:0 8px 30px #667eea59}.cards-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:30px}.flip-card{background-color:transparent;height:220px;perspective:1200px;transition:opacity .4s ease,transform .4s ease}.flip-card-inner{position:relative;width:100%;transition:transform .7s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}.flip-card:hover .flip-card-inner{transform:rotateY(180deg)}.flip-card:hover{transform:translateY(-6px)}.flip-card-front,.flip-card-back{position:absolute;width:100%;height:226px;backface-visibility:hidden;border-radius:4px;padding:28px 24px;display:flex;flex-direction:column;box-sizing:border-box;overflow:hidden;background:#02993b}.flip-card-front{background:linear-gradient(160deg,#fff,#f8faff);border:1px solid rgba(102,126,234,.08);box-shadow:0 4px 20px #0000000f}.flip-card-front.alt-front{background:linear-gradient(160deg,#fff,#fdf2f8)}.flip-card-front.omni-front{background:linear-gradient(160deg,#fff,#ecfdf5)}.flip-card-back{transform:rotateY(180deg);color:#fff;box-shadow:0 8px 40px #667eea4d}.flip-card-back.alt-back{background:linear-gradient(145deg,#ec4899,#8b5cf6);box-shadow:0 8px 40px #ec48994d}.flip-card-back.omni-back{background:linear-gradient(145deg,#059669,#34d399);box-shadow:0 8px 40px #0596694d}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}.card-badge{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;padding:4px 14px;border-radius:20px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.card-badge.secure{background:linear-gradient(135deg,#34d399,#059669)}.card-badge.premium{background:linear-gradient(135deg,#f59e0b,#d97706)}.card-badge.alt{background:linear-gradient(135deg,#ec4899,#8b5cf6)}.card-badge.omni{background:linear-gradient(135deg,#06b6d4,#0891b2)}.card-icon{font-size:11px;font-weight:700;padding:5px 14px;border-radius:8px;letter-spacing:.5px}.card-icon.visa{background:#1a73e81f;color:#1a73e8}.card-icon.mastercard{background:#eb001b1f;color:#eb001b}.card-icon.amex{background:#0071ce1f;color:#0071ce}.card-icon.alipay{background:#1677ff1f;color:#1677ff}.card-icon.ideal{background:#cc00331f;color:#c03}.card-icon.online{background:#34d39926;color:#34d399}.card-icon.in-store{background:#f59e0b26;color:#f59e0b}.card-icon.mobile{background:#8b5cf626;color:#8b5cf6}.flip-card-front h3{font-size:18px;font-weight:700;color:#1a1a2e;margin:0 0 8px}.flip-card-front p{font:20px Open Sans,Arial,Helvetica,sans-serif;color:#333;line-height:1.6;margin:0 0 16px}.card-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.card-tags span{font-size:11px;font-weight:600;color:#888;padding:3px 14px;background:#0000000a;border-radius:20px}.flip-hint{font-size:11px;color:#b0b8c8;text-align:center;letter-spacing:.5px;margin-top:auto;animation:pulseHint 2.5s ease-in-out infinite}@keyframes pulseHint{0%,to{opacity:.5}50%{opacity:1}}.flip-card-back h3{font:20px Open Sans,Arial,Helvetica,sans-serif;color:#fff;margin:0 0 16px;text-align:center}.flip-card-back p{list-style:none;font:14px Open Sans,Arial,Helvetica,sans-serif;line-height:20px;padding:0;margin:0;flex:1}.flip-card.hidden{opacity:0;transform:scale(.85) translateY(20px);pointer-events:none;transition:all .4s ease}.flip-card.visible{opacity:1;transform:scale(1) translateY(0);transition:all .4s ease}@media(max-width:768px){.cards-container{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}.flip-card{height:260px}.flip-card-front h3{font-size:16px}.flip-card-front p{font-size:13px}.category-btn{padding:8px 18px;font-size:13px}}@media(max-width:480px){.cards-container{max-width:380px;margin:0 auto}.category-filter{gap:8px}.category-btn{padding:6px 14px;font-size:12px}}