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h4{color:var(--text-dark);margin-bottom:1rem;font-size:1.125rem}.btc-address-container{display:flex;flex-direction:column;align-items:center;gap:1rem;max-width:600px;margin:0 auto}.btc-address-button{display:flex;align-items:center;gap:.75rem;background:linear-gradient(135deg,var(--bitcoin-orange) 0%,var(--bitcoin-orange-dark) 100%);color:#fff;padding:1rem 1.5rem;border:none;border-radius:1rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #f973164d;position:relative;overflow:hidden;width:100%;max-width:500px}.btc-address-button:hover{transform:translateY(-2px);box-shadow:0 8px 25px #f9731666;background:linear-gradient(135deg,var(--bitcoin-orange-light) 0%,var(--bitcoin-orange) 100%)}.btc-address-button:active{transform:translateY(0);box-shadow:0 4px 15px 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968px){.hero-content{grid-template-columns:1fr;gap:2rem;text-align:center}.hero-title{font-size:2.5rem}.donation-section{justify-content:center}.footer-content{grid-template-columns:1fr;gap:2rem}}@media (max-width: 640px){.container{padding:0 1rem}.hero{padding:2rem 0 3rem}.hero-title,.section-title{font-size:2rem}.hero-buttons{flex-direction:column;align-items:center}.btn{width:100%;justify-content:center;max-width:300px}.btc-address-container{max-width:350px}.btc-address-button{font-size:.75rem;padding:.875rem 1rem;gap:.5rem}.btc-address-text{font-size:.75rem}.preview-grid{grid-template-columns:1fr;gap:1rem}.newsletter-form{flex-direction:column;gap:.5rem}.newsletter-input,.btn-newsletter{border-radius:.375rem}.footer-bottom{flex-direction:column;text-align:center}}html{scroll-behavior:smooth}img{transition:var(--transition)}img:hover{filter:brightness(1.05)}.btn:focus,.newsletter-input:focus{outline:none;box-shadow:0 0 0 3px #f7931a4d}.social-link:focus{outline:2px solid var(--bitcoin-orange);outline-offset:2px}