:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--app-bg: linear-gradient(180deg, #f5f5f7 0%, #e8e8ed 100%);--card-bg: #fff;--text-color: #0a0a0a;--text-muted: #4a4a4a;--text-label: #1a1a1a;--input-bg: #fff;--border-color: #e0e0e5;--border-hover: #c8c8d0;--shadow-sm: 0 2px 6px rgba(0, 0, 0, .04);--shadow-md: 0 2px 8px rgba(0, 0, 0, .06);--shadow-focus: rgba(0, 0, 0, .08);--status-error-bg: #fef2f2;--status-error-color: #b91c1c;--donate-btn-bg: linear-gradient(135deg, #0a0a0a 0%, #2a2a2e 100%);--donation-close-bg: #f0f0f4;--donation-close-hover: #e0e0e5;--select-arrow: #4a4a4a}body[data-theme=dark]{--app-bg: linear-gradient(180deg, #0f172a 0%, #0c1222 50%, #080d18 100%);--card-bg: #1e293b;--text-color: #f1f5f9;--text-muted: #94a3b8;--text-label: #e2e8f0;--input-bg: #1e293b;--border-color: #334155;--border-hover: #475569;--shadow-sm: 0 2px 12px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-focus: rgba(99, 179, 237, .35);--status-error-bg: #3f1a1a;--status-error-color: #fca5a5;--donate-btn-bg: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);--donation-close-bg: #334155;--donation-close-hover: #475569;--select-arrow: #94a3b8}.app{min-height:100vh;background:var(--app-bg);padding:clamp(1rem,4vw,2rem);box-sizing:border-box;position:relative}.theme-toggle{position:absolute;top:clamp(1rem,4vw,2rem);right:clamp(1rem,4vw,2rem);width:48px;height:48px;border:none;border-radius:12px;background:var(--card-bg);color:var(--text-color);font-size:1.5rem;cursor:pointer;box-shadow:var(--shadow-sm);border:2px solid var(--border-color);transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;align-items:center;justify-content:center;line-height:1}.theme-toggle:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md);transform:scale(1.05)}.theme-toggle:focus{outline:none;box-shadow:0 0 0 3px var(--shadow-focus)}.app-header{text-align:center;margin-bottom:1.5rem}.app-title{font-size:clamp(1.75rem,5vw,2.25rem);font-weight:800;color:var(--text-color);letter-spacing:-.02em;margin:0 0 .25rem}.app-subtitle{font-size:clamp(.875rem,2.5vw,1rem);color:var(--text-muted);font-weight:500;margin:0}.btc-price{text-align:center;font-size:clamp(.9375rem,2.5vw,1.0625rem);font-weight:700;color:var(--text-color);background:var(--card-bg);padding:.75rem 1rem;border-radius:12px;box-shadow:var(--shadow-md);margin:0 auto 1.5rem;max-width:360px;border:1px solid var(--border-color)}.status{text-align:center;padding:.75rem 1rem;border-radius:12px;font-weight:600;font-size:.9375rem;margin-bottom:1rem;max-width:360px;margin-left:auto;margin-right:auto;border:1px solid var(--border-color)}.status-loading{background:var(--card-bg);color:var(--text-muted);box-shadow:var(--shadow-md)}.status-error{background:var(--status-error-bg);color:var(--status-error-color);box-shadow:0 2px 8px #b91c1c1f}.converter{max-width:420px;margin:0 auto;display:flex;flex-direction:column;gap:1.25rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-group label{font-size:.8125rem;font-weight:700;color:var(--text-label);letter-spacing:.01em}.input-row{display:flex;gap:.75rem;align-items:stretch}.currency-select{min-width:88px;padding:1rem 2rem 1rem .75rem;font-size:1rem;font-weight:700;color:var(--text-color);background:var(--input-bg);border:2px solid var(--border-color);border-radius:12px;cursor:pointer;box-shadow:var(--shadow-sm);transition:border-color .2s,box-shadow .2s;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a4a4a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center}body[data-theme=dark] .currency-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E")}.currency-select:hover{border-color:var(--border-hover)}.currency-select:focus{outline:none;border-color:var(--text-color);box-shadow:0 0 0 3px var(--shadow-focus)}.amount-input{flex:1;min-height:52px;padding:1rem;font-size:1.25rem;font-weight:700;color:var(--text-color);background:var(--input-bg);border:2px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-sm);transition:border-color .2s,box-shadow .2s}.amount-input::placeholder{color:var(--text-muted);font-weight:600}.amount-input:hover{border-color:var(--border-hover)}.amount-input:focus{outline:none;border-color:var(--text-color);box-shadow:0 0 0 3px var(--shadow-focus)}.amount-input-sats{font-variant-numeric:tabular-nums}@media(max-width:480px){.amount-input,.currency-select{min-height:56px;font-size:1.125rem}.amount-input{font-size:1.375rem}}.donate-btn{margin-top:1rem;min-height:52px;padding:1rem 1.5rem;font-size:1.0625rem;font-weight:700;color:#fff;background:var(--donate-btn-bg);border:none;border-radius:12px;box-shadow:0 4px 14px #0003;cursor:pointer;transition:transform .15s,box-shadow .2s}.donate-btn:hover{box-shadow:0 6px 20px #00000040;transform:translateY(-1px)}.donate-btn:active{transform:translateY(0)}.donate-btn:focus{outline:none;box-shadow:0 0 0 3px var(--shadow-focus)}.donation-backdrop{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;box-sizing:border-box}body[data-theme=dark] .donation-backdrop{background:#000000b3}.donation-modal{background:var(--card-bg);border-radius:16px;box-shadow:0 24px 48px #0003;padding:1.75rem;max-width:320px;width:100%;text-align:center;border:1px solid var(--border-color)}.donation-modal-title{font-size:1.25rem;font-weight:800;color:var(--text-color);margin:0 0 1.25rem;letter-spacing:-.02em}.donation-qr-wrap{display:flex;align-items:center;justify-content:center;padding:1rem;background:#fff;border:1px solid #e8e8ed;border-radius:12px;margin-bottom:1rem}.donation-qr{display:block}.donation-address{font-size:.9375rem;font-weight:600;color:var(--text-muted);word-break:break-all;margin:0 0 1.25rem}.donation-close{min-height:48px;padding:.75rem 1.5rem;font-size:1rem;font-weight:700;color:var(--text-color);background:var(--donation-close-bg);border:none;border-radius:12px;cursor:pointer;transition:background .2s;width:100%}.donation-close:hover{background:var(--donation-close-hover)}.donation-close:focus{outline:none;box-shadow:0 0 0 2px var(--text-color)}