:root{--bg: #000000;--panel: #1a2038;--panel-border: #3e4a78;--text: #f2f5ff;--muted: #b8c2ea;--field-bg: #232b47;--field-border: #4e5e91;--primary-a: #6e7bff;--primary-b: #9d5cff;--secondary-bg: #2b3558;--secondary-border: #55679d;--secondary-text: #f2f5ff;--danger: #ff9db1}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);transition:background-color .2s ease,color .2s ease}body{padding:20px}.app{max-width:680px;margin:0 auto}.topbar{display:flex;gap:16px;justify-content:space-between;align-items:flex-start;margin-bottom:20px}.topbar h1{margin:0 0 8px;font-size:1.8rem}.topbar p{margin:0;color:var(--muted)}.theme-toggle{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--muted);white-space:nowrap;padding-top:10px}.theme-switch{position:relative;display:inline-flex;align-items:center;flex:0 0 auto}.panel{container-type:inline-size;background:var(--panel);border:1px solid var(--panel-border);border-radius:28px;padding:22px;box-shadow:0 20px 60px #00000040}.field{display:block;margin-bottom:16px}.field span{display:block;margin-bottom:6px;font-weight:700}input,select,button{font:inherit}input:not([type=checkbox]):not([type=radio]),select{width:100%;height:52px;border-radius:18px;border:1px solid var(--field-border);background:var(--field-bg);color:var(--text);padding:0 14px}.theme-toggle input[type=checkbox]{position:absolute;top:0;right:0;bottom:0;left:0;width:52px;height:32px;margin:0;opacity:0;cursor:pointer}.theme-switch-slider{position:relative;width:52px;height:32px;border-radius:999px;background:var(--secondary-bg);border:1px solid var(--secondary-border);transition:background-color .2s ease,border-color .2s ease}.theme-switch-slider:after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 2px 8px #0003;transition:transform .2s ease}.theme-toggle input[type=checkbox]:checked+.theme-switch-slider{background:linear-gradient(90deg,var(--primary-a),var(--primary-b));border-color:transparent}.theme-toggle input[type=checkbox]:checked+.theme-switch-slider:after{transform:translate(20px)}.theme-toggle input[type=checkbox]:focus-visible+.theme-switch-slider{outline:2px solid var(--primary-a);outline-offset:3px}button{width:100%;height:56px;border:0;border-radius:22px;cursor:pointer;font-weight:700}button.primary{background:linear-gradient(90deg,var(--primary-a),var(--primary-b));color:#fff}button.secondary{background:var(--secondary-bg);color:var(--secondary-text);border:1px solid var(--secondary-border)}.status{min-height:24px;color:var(--danger)}.result.hidden{display:none}.result h2{margin:0 0 8px}.result p{margin:0 0 16px;color:var(--muted)}.actions{display:grid;gap:10px}.download-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:22px;padding-top:18px;border-top:1px solid var(--panel-border)}.download-links a,.download-links button{background:transparent;border:0;border-radius:0;height:auto;padding:0;color:var(--muted);font-weight:700;text-align:center;text-decoration:underline;text-decoration-color:var(--primary-a);text-underline-offset:4px}.download-links a:first-child{text-align:left}.download-links button:last-child{text-align:right}.download-links a:hover,.download-links a:focus-visible,.download-links button:hover,.download-links button:focus-visible{color:var(--text)}.qr-dialog{width:min(90vw,520px);padding:24px;border:1px solid var(--panel-border);border-radius:28px;background:var(--panel);color:var(--text);box-shadow:0 24px 80px #00000073}.qr-dialog::backdrop{background:#000000b8}.qr-dialog h2{margin:0 0 18px;text-align:center}.qr-dialog img{display:block;width:min(100%,400px);margin:0 auto;border-radius:16px;background:#fff}.qr-dialog-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:20px}.qr-dialog-actions a,.qr-dialog-actions button{display:flex;align-items:center;justify-content:center;width:100%;height:52px;border-radius:20px;font-weight:700;text-decoration:none}.qr-dialog-actions a.primary{background:linear-gradient(90deg,var(--primary-a),var(--primary-b));color:#fff}@container (max-width: 280px){.download-links{grid-template-columns:1fr;gap:12px}.download-links a,.download-links a:first-child,.download-links button:last-child{text-align:center}}html.theme-light,body.theme-light{--bg: #ffffff;--panel: #eef2ff;--panel-border: #c8d2ff;--text: #1a2240;--muted: #5d6888;--field-bg: #fbfcff;--field-border: #ccd7ff;--secondary-bg: #dde5ff;--secondary-border: #b7c6ff;--secondary-text: #33406a;--danger: #a63a52}@media (max-width: 640px){body{padding:16px}.topbar{flex-direction:column;align-items:stretch}.theme-toggle{padding-top:0;justify-content:space-between}}