:root{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;color:#14233f;background:#fffdf4}*{box-sizing:border-box}body{margin:0;padding:28px 20px}main{max-width:460px;margin:0 auto}.brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:800}.brand img{width:32px;height:32px}h1{font-size:32px;line-height:1.25;letter-spacing:-1px;margin:28px 0 14px}p{font-size:15px;line-height:1.7;margin:10px 0;color:#53617a}.panel{margin:24px 0;background:#fff;border:1px solid #dce4f0;border-radius:20px;padding:22px;text-align:center}.panel h2{font-size:19px;margin:0 0 14px}.group-image{display:block;width:100%;max-height:520px;object-fit:contain;margin:0 auto}button,.button{display:inline-block;border:0;border-radius:10px;background:#1557ed;color:#fff;padding:13px 20px;font:inherit;cursor:pointer;text-decoration:none}button.secondary{background:#eaf0ff;color:#1557ed}button:disabled{opacity:.5;cursor:wait}label{display:block;font-size:14px;font-weight:650;margin:20px 0 8px}input{width:100%;padding:12px;border:1px solid #cbd5e6;border-radius:8px;font:inherit}input[type=file]{padding:10px}.status{white-space:pre-line;color:#1557ed;min-height:24px}.error{color:#a82424}.buttons{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}[hidden]{display:none!important}.hint{font-size:13px}.empty-icon{font-size:44px;margin:16px}footer{margin-top:30px;padding-top:20px;border-top:1px solid #e1e6ef;font-size:13px;color:#53617a}.admin-header{background:#ffdf60;border-radius:14px;padding:16px}.admin-header h1{margin:0;font-size:25px}
/* Public entry: the original group image is the main content. */
.join-page{background:#f7f8fa;padding:16px 12px;min-height:100vh;min-height:100svh;display:flex;align-items:center;justify-content:center}.join-main{width:100%;max-width:560px;margin:auto;text-align:center}.join-header h1{font-size:21px;letter-spacing:0;margin:0 0 4px}.join-header p{font-size:13px;margin:0;color:#647084}.join-page .panel{margin:16px 0;padding:14px;border-radius:12px}.join-page .qr-panel{padding:12px;background:#fff}.qr-panel h2{font-size:14px;font-weight:500;color:#647084;margin:0 0 8px}.join-page .group-image{width:100%;height:auto;max-height:64vh;max-height:64svh;object-fit:contain}.qr-panel .hint{font-size:11px;margin:8px 0 0}.qr-panel .hint:empty,.join-page .error:empty{display:none}.join-tools{display:flex;flex-direction:column;align-items:center;gap:8px}.join-tools button{padding:8px 14px;font-size:13px}.join-tools span{font-size:11px;color:#778194}.join-page footer{border:0;margin-top:12px;padding:0;font-size:11px;color:#778194}button:focus-visible,input:focus-visible{outline:3px solid #1557ed;outline-offset:3px}