:root{--bg:#0b1220;--card:#0f1626;--text:#e6e8eb;--muted:#9aa4b2;--accent:#3b82f6;--accent-2:#22c55e;--border:#1e293b;--danger:#ef4444}
*{box-sizing:border-box}
html,body{height:100%;touch-action:pan-x pan-y}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.page{display:flex;flex-direction:column;min-height:100vh}
.page::before{content:"";position:fixed;left:-20vw;top:-20vh;right:-20vw;bottom:-20vh;background:radial-gradient(60% 60% at 10% 20%,rgba(59,130,246,.15),transparent 60%),radial-gradient(50% 50% at 80% 0,rgba(34,197,94,.12),transparent 60%),radial-gradient(50% 50% at 50% 90%,rgba(236,72,153,.10),transparent 60%);z-index:-1;filter:blur(60px);pointer-events:none}
.header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);background:var(--card);position:sticky;top:0;z-index:10}
.brand{font-size:20px;font-weight:600;letter-spacing:.3px;position:relative;padding-left:16px}
.brand::before{content:"";position:absolute;left:0;top:.7em;transform:translateY(-50%);width:8px;height:8px;border-radius:999px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 0 12px rgba(59,130,246,.6)}
.header-actions{display:flex;gap:12px}
.avatar{width:34px;height:34px;border-radius:10px;border:1px solid var(--border);background:#0c1322;color:var(--text);display:flex;align-items:center;justify-content:center;font-weight:700;user-select:none}
.main{width:100%;max-width:1000px;margin:0 auto;padding:24px;display:flex;flex-direction:column;gap:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.form{display:flex;flex-direction:column;gap:14px}
.label{font-size:13px;color:var(--muted);margin-bottom:6px;display:block}
.row{display:flex;flex-direction:column;gap:8px}
.input,.select{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:#0c1322;color:var(--text);font-size:14px;outline:none;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}
.input::placeholder,.select::placeholder{color:var(--muted)}
.input:focus,.select:focus{border-color:var(--border);box-shadow:none}
.input:disabled,.select:disabled{opacity:.6;cursor:not-allowed}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border:1px solid var(--border);background:transparent;color:var(--text);border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:transform .02s ease,border-color .15s ease,background .15s ease,box-shadow .15s ease}
.button:hover{background:transparent;border-color:var(--border);box-shadow:none;color:var(--text)}
.button:active{transform:scale(.98)}
.button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}
.button.sm{padding:8px 12px;font-size:13px}
.button.secondary{background:transparent;border-color:var(--border);color:var(--text)}
.button.secondary:hover{border-color:var(--border);color:var(--text)}
.button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.button.primary:hover{background:#2563eb;border-color:#2563eb;color:#fff}
.sr-only{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.button.danger{background:var(--danger);border-color:var(--danger)}
.button.danger:hover{background:#dc2626}
.result{display:flex;flex-direction:column;gap:10px}
.result-title{font-size:16px;color:var(--text);font-weight:700;letter-spacing:.2px;position:relative}
.result-title::after{content:"";display:block;width:44px;height:2px;margin-top:6px;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px}
.result-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.friend-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;align-items:start}
.friend-links .link-chip{width:100%;justify-content:center}
.friend-links.collapsed .link-chip:nth-child(n+4){display:none}
.result-url{font-size:15px;word-break:break-all;background:#0c1322;border:1px solid var(--border);border-radius:12px;padding:10px 12px;flex:1;min-width:240px;min-height:42px;display:block}
.meta{font-size:12px;color:var(--muted)}
.auth{display:flex;flex-direction:column;gap:14px}
.auth-tabs{display:flex;gap:10px}
.tab{padding:8px 12px;border:1px solid var(--border);background:#0c1322;color:var(--text);border-radius:12px;font-size:13px;cursor:pointer;transition:border-color .15s ease,background .15s ease}
.tab.active{border-color:var(--border);color:#fff;background:var(--accent)}
.auth-body{display:flex;flex-direction:column;gap:10px}
.auth-status{font-size:12px;color:var(--muted)}
.hidden{display:none}
.footer{margin-top:auto;padding:16px 20px;border-top:1px solid var(--border);background:var(--card);display:flex;justify-content:center}
.footnote{font-size:12px;color:var(--muted)}
@media(min-width:768px){.main{max-width:1000px}}
.user-menu{position:absolute;min-width:240px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:12px;box-shadow:0 8px 24px rgba(0,0,0,.35);z-index:1000}
.menu-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;font-size:14px}
.menu-label{color:var(--muted)}
.menu-value{color:var(--text);font-weight:600}
.menu-actions{display:flex;justify-content:flex-end;gap:8px}
.user-menu .menu-actions{flex-direction:column;align-items:stretch;justify-content:flex-start}
.user-menu .menu-actions .button{width:100%}
.card .menu-actions{margin-top:8px}
.user-menu-backdrop{position:fixed;left:0;top:0;right:0;bottom:0;background:transparent;z-index:999}
@media(max-width:480px){.user-menu{max-width:calc(100vw - 24px);width:auto}.header{padding:12px 14px}.main{padding:16px}}
.link{color:var(--accent);text-decoration:none}
.link:hover{color:var(--accent);text-decoration:underline}
.link-chip{display:inline-flex;align-items:center;padding:6px 12px;border:1px solid var(--border);border-radius:999px;color:var(--accent);background:#0c1322;text-decoration:none;font-weight:600;transition:background .15s ease,color .15s ease}
.link-chip:hover{background:var(--accent);color:#fff}
.ellipsis{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
textarea.input{resize:none}
/* batch result scroll container */
.result-scroll{max-height:320px;overflow-y:auto;padding-right:6px}
/* counter indicator */
.count-indicator{font-size:12px;color:var(--muted);text-align:right}
.count-danger{color:var(--danger)}
.list-scroll{max-height:min(60vh,480px);overflow-y:auto;padding-right:6px;-webkit-overflow-scrolling:touch}
@media(max-width:480px){.list-scroll{max-height:60vh}}
.modal{position:fixed;left:0;top:0;right:0;bottom:0;background:rgba(0,0,0,.4);display:none;align-items:center;justify-content:center;z-index:1000}
.modal-box{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.35);max-width:640px;width:calc(100vw - 48px)}
html[data-theme="light"]{--bg:#f7f8fa;--card:#ffffff;--text:#111827;--muted:#6b7280;--accent:#3b82f6;--accent-2:#22c55e;--border:#e5e7eb;--danger:#ef4444}
html[data-theme="light"] .input,html[data-theme="light"] .select,html[data-theme="light"] .tab,html[data-theme="light"] .result-url,html[data-theme="light"] .link-chip{background:#ffffff;color:var(--text);border-color:var(--border)}
html[data-theme="light"] .avatar{background:#ffffff;color:var(--text)}
html[data-theme="light"] .button,html[data-theme="light"] .button.secondary{color:#000}
html[data-theme="light"] .button.secondary:hover{color:#000}
html[data-theme="light"] .qr-modal .qr-box .qr-img{background:#ffffff}
/* feed animation */
#feedBox{min-height:18px;transition:opacity .3s ease,transform .3s ease}
#feedBox.fade-hide{opacity:0;transform:translateY(-4px)}
#feedBox .feed-user{color:var(--text);font-weight:700}
#feedBox .feed-code{color:var(--accent);font-weight:700}
#feedBox .feed-time{color:var(--muted);margin-left:8px}