*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg: #f5f5f4;--color-surface: #ffffff;--color-border: #e5e5e4;--color-border-light: #f0f0ef;--color-text: #1c1917;--color-text-muted: #78716c;--color-text-faint: #a8a29e;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-2xx-bg: #f0fdf4;--color-2xx-text: #166534;--color-2xx-border: #bbf7d0;--color-3xx-bg: #fffbeb;--color-3xx-text: #92400e;--color-3xx-border: #fde68a;--color-4xx-bg: #fef2f2;--color-4xx-text: #991b1b;--color-4xx-border: #fecaca;--color-5xx-bg: #fdf4ff;--color-5xx-text: #6b21a8;--color-5xx-border: #e9d5ff;--color-err-bg: #f5f5f4;--color-err-text: #57534e;--color-err-border: #d6d3d1;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5;background:var(--color-bg);color:var(--color-text);min-height:100vh;display:flex;flex-direction:column}.container{max-width:760px;margin:0 auto;padding:0 20px}header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:14px 0;position:sticky;top:0;z-index:10;box-shadow:var(--shadow-sm)}.logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px;color:var(--color-text)}.logo svg{color:var(--color-accent);flex-shrink:0}main{padding:32px 0 64px;flex:1}.input-section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px;margin-bottom:24px;box-shadow:var(--shadow-sm)}.input-row{display:flex;gap:8px}input[type=text],textarea{font-family:inherit;font-size:14px;color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:9px 12px;outline:none;transition:border-color .15s;width:100%}input[type=text]:focus,textarea:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px #2563eb1a}input[type=text]::placeholder,textarea::placeholder{color:var(--color-text-faint)}#url-input{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}button{font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;border:none;border-radius:var(--radius-md);padding:9px 18px;transition:background .15s,opacity .15s;white-space:nowrap}button:disabled{opacity:.5;cursor:not-allowed}#check-btn,.bulk-actions button{background:var(--color-accent);color:#fff}#check-btn:hover:not(:disabled),.bulk-actions button:hover:not(:disabled){background:var(--color-accent-hover)}.bulk-toggle{display:inline-flex;align-items:center;gap:5px;margin-top:12px;padding:5px 10px;background:transparent;color:var(--color-text-muted);border:1px solid var(--color-border);font-size:13px}.bulk-toggle:hover{background:var(--color-bg)}.bulk-panel{display:none;margin-top:12px}.bulk-panel.open{display:block}textarea{height:100px;resize:vertical;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px}.bulk-actions{display:flex;align-items:center;justify-content:space-between;margin-top:8px}.bulk-hint{font-size:12px;color:var(--color-text-faint)}.bulk-hint-error{color:var(--color-4xx-text);font-weight:500}.bulk-progress{font-size:13px;color:var(--color-text-faint);padding:0 0 12px}.results{display:flex;flex-direction:column;gap:12px}.empty-state{text-align:center;padding:48px 20px;color:var(--color-text-muted)}.empty-state svg{opacity:.25;margin-bottom:12px}.empty-state p{font-size:15px}.empty-state small{font-size:13px;color:var(--color-text-faint)}.result-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}.card-header{display:flex;align-items:center;gap:10px;padding:13px 16px;cursor:pointer;-webkit-user-select:none;user-select:none}.card-header:hover{background:var(--color-bg)}.status-badge{font-size:12px;font-weight:600;padding:3px 9px;border-radius:var(--radius-sm);border:1px solid transparent;flex-shrink:0;min-width:46px;text-align:center;letter-spacing:.02em}.badge-2xx{background:var(--color-2xx-bg);color:var(--color-2xx-text);border-color:var(--color-2xx-border)}.badge-3xx{background:var(--color-3xx-bg);color:var(--color-3xx-text);border-color:var(--color-3xx-border)}.badge-4xx{background:var(--color-4xx-bg);color:var(--color-4xx-text);border-color:var(--color-4xx-border)}.badge-5xx{background:var(--color-5xx-bg);color:var(--color-5xx-text);border-color:var(--color-5xx-border)}.badge-err{background:var(--color-err-bg);color:var(--color-err-text);border-color:var(--color-err-border)}.card-url{flex:1;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-meta{display:flex;align-items:center;gap:10px;flex-shrink:0}.card-duration{font-size:12px;color:var(--color-text-faint)}.card-chevron{color:var(--color-text-faint);transition:transform .2s;flex-shrink:0}.card-header.open .card-chevron{transform:rotate(180deg)}.card-loading .card-header{cursor:default}.card-loading .card-header:hover{background:transparent}.spinner{width:16px;height:16px;border:2px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;animation:spin .75s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(360deg)}}.card-loading-url{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px;color:var(--color-text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-body{display:none;border-top:1px solid var(--color-border-light)}.card-body.open{display:block}.chain-section{padding:14px 16px}.section-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--color-text-faint);margin-bottom:10px}.chain-hops{display:flex;flex-direction:column;gap:0}.chain-hop{display:flex;align-items:flex-start;gap:10px}.hop-left{display:flex;flex-direction:column;align-items:center;gap:0;flex-shrink:0;padding-top:2px}.hop-badge{font-size:11px;font-weight:600;padding:2px 7px;border-radius:var(--radius-sm);border:1px solid transparent;min-width:40px;text-align:center}.hop-line{width:1px;flex:1;min-height:14px;background:var(--color-border);margin:3px 0}.hop-right{flex:1;padding-bottom:12px;overflow:hidden}.chain-hop:last-child .hop-right{padding-bottom:0}.chain-hop:last-child .hop-line{display:none}.hop-url{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:12px;color:var(--color-text);word-break:break-all}.hop-detail{font-size:11px;color:var(--color-text-faint);margin-top:2px}.headers-section{border-top:1px solid var(--color-border-light);padding:14px 16px}.headers-table{width:100%;border-collapse:collapse;font-size:12px}.headers-table tr:not(:last-child) td{border-bottom:1px solid var(--color-border-light)}.headers-table td{padding:5px 0;vertical-align:top}.headers-table td:first-child{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;color:var(--color-text-muted);width:180px;padding-right:12px;white-space:nowrap}.headers-table td:last-child{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;color:var(--color-text);word-break:break-all}.card-actions{border-top:1px solid var(--color-border-light);padding:10px 16px;display:flex;justify-content:flex-end}.btn-copy{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;background:transparent;border:1px solid var(--color-border);color:var(--color-text-muted);font-size:12px;border-radius:var(--radius-sm)}.btn-copy:hover{background:var(--color-bg);color:var(--color-text)}.btn-copy.copied{color:var(--color-2xx-text);border-color:var(--color-2xx-border);background:var(--color-2xx-bg)}.card-error{padding:12px 16px;font-size:13px;color:var(--color-4xx-text);background:var(--color-4xx-bg);border-top:1px solid var(--color-4xx-border)}footer{margin-top:48px;padding:16px 0;text-align:center}.version-label{font-size:11px;color:var(--color-text-faint);font-variant-numeric:tabular-nums}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}