*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f5f5f4;--surface: #ffffff;--border: #e4e4e0;--text: #1a1a18;--muted: #8a8a84;--accent: #2563eb;--accent-soft: #dbeafe;--danger: #dc2626;--you: #1d4ed8;--ring-color: #d4d4cf;--radius: 12px;--font: "DM Sans", sans-serif;--mono: "DM Mono", monospace}html,body{height:100%;font-family:var(--font);background:var(--bg);color:var(--text);overflow:hidden}header{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:var(--surface);border-bottom:1px solid var(--border)}.logo{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:500;letter-spacing:-.01em}.header-right{font-size:13px;color:var(--muted)}.my-id-label code{font-family:var(--mono);font-size:12px;background:var(--bg);padding:2px 7px;border-radius:5px;border:1px solid var(--border);color:var(--text);letter-spacing:.04em}main{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding-top:57px;gap:20px}.radar-area{position:relative;width:420px;height:420px;display:flex;align-items:center;justify-content:center}.radar-rings{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.ring{position:absolute;border-radius:50%;border:1px solid var(--ring-color)}.ring-1{width:130px;height:130px}.ring-2{width:250px;height:250px}.ring-3{width:380px;height:380px}.radar-pulse{position:absolute;width:380px;height:380px;border-radius:50%;border:1.5px solid var(--accent);opacity:0;animation:pulse-out 3s ease-out infinite}@keyframes pulse-out{0%{transform:scale(.3);opacity:.5}to{transform:scale(1);opacity:0}}.node{position:absolute;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;-webkit-user-select:none;user-select:none;transform:translate(-50%,-50%)}.node span{font-size:11.5px;color:var(--muted);white-space:nowrap;font-weight:400}.avatar{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid var(--border);background:var(--surface);transition:transform .15s ease,box-shadow .15s ease;box-shadow:0 2px 8px #0000000f}.node:not(.you):hover .avatar{transform:scale(1.08);box-shadow:0 4px 16px #2563eb2e;border-color:var(--accent)}.you-avatar{background:var(--you);border-color:var(--you);color:#fff;width:58px;height:58px}.you{left:50%;top:50%;z-index:10;cursor:default}.you span{color:var(--text);font-weight:500}.peer-node 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button:hover{opacity:.85}.modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000040;display:flex;align-items:center;justify-content:center;z-index:200;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal.hidden{display:none}.modal-box{background:var(--surface);border-radius:16px;padding:28px 32px;min-width:300px;max-width:360px;width:100%;box-shadow:0 8px 40px #00000024;display:flex;flex-direction:column;gap:14px}.modal-peer-name{font-size:17px;font-weight:500;letter-spacing:-.01em}.modal-hint{font-size:13px;color:var(--muted);margin-top:-6px}.file-pick-label{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1.5px dashed var(--border);border-radius:10px;cursor:pointer;font-size:13px;color:var(--muted);transition:border-color .15s,background .15s}.file-pick-label:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.file-pick-label svg{flex-shrink:0}#file-name-display{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.modal-actions{display:flex;gap:8px;justify-content:flex-end}.btn-primary{font-family:var(--font);font-size:13px;font-weight:500;padding:8px 18px;border:none;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer;transition:opacity .15s}.btn-primary:disabled{opacity:.4;cursor:default}.btn-primary:not(:disabled):hover{opacity:.85}.btn-ghost{font-family:var(--font);font-size:13px;font-weight:400;padding:8px 14px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--muted);cursor:pointer;transition:border-color .15s}.btn-ghost:hover{border-color:var(--text);color:var(--text)}.progress-wrap{display:flex;align-items:center;gap:10px}.progress-wrap.hidden{display:none}.progress-bar-track{flex:1;height:4px;background:var(--bg);border-radius:99px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent);border-radius:99px;width:0%;transition:width .1s linear}#progress-label{font-size:12px;color:var(--muted);font-family:var(--mono);min-width:34px;text-align:right}.receive-toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%);z-index:300}.receive-toast.hidden{display:none}.toast-inner{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px 22px;box-shadow:0 6px 28px 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