:root{--font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-color: #0f172a;--card-bg: #1e293b;--card-border: #334155;--text-main: #f8fafc;--text-muted: #94a3b8;--primary-accent: #3b82f6;--primary-hover: #2563eb;--success-bg: #064e3b;--success-text: #34d399;--success-border: #047857;--error-bg: #4c1d95;--error-text: #f43f5e;--error-border: #e11d48}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family),sans-serif;background-color:var(--bg-color);color:var(--text-main);min-height:100vh;display:flex;justify-content:center;align-items:center;padding:2rem 1.5rem}#app{width:100%;max-width:620px}.container{background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;padding:2.5rem 2rem;box-shadow:0 20px 25px -5px #0000004d,0 8px 10px -6px #0000004d}.header{text-align:center;margin-bottom:2rem}.header .icon{font-size:2.5rem;margin-bottom:.5rem;display:inline-block}.header h1{font-size:1.6rem;font-weight:700;color:var(--text-main);letter-spacing:-.02em}.header p{color:var(--text-muted);font-size:.95rem;margin-top:.4rem}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-size:.85rem;font-weight:600;color:var(--text-muted);margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em}.url-input-wrapper{display:flex;gap:.5rem}.input-field{flex:1;background:#0f172a;border:1px solid var(--card-border);border-radius:8px;padding:.75rem 1rem;color:var(--text-main);font-family:inherit;font-size:.95rem;outline:none;transition:border-color .2s ease}.input-field:focus{border-color:var(--primary-accent)}.preset-btn{background:#334155;color:var(--text-main);border:none;border-radius:8px;padding:0 .9rem;font-size:.85rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:background .2s ease}.preset-btn:hover{background:#475569}.action-btn{width:100%;background:var(--primary-accent);color:#fff;border:none;border-radius:10px;padding:.9rem 1.5rem;font-size:1rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.6rem;transition:all .2s ease;box-shadow:0 4px 12px #3b82f640}.action-btn:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 16px #3b82f659}.action-btn:active:not(:disabled){transform:translateY(0)}.action-btn:disabled{opacity:.65;cursor:not-allowed}.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.result-card{margin-top:1.8rem;border-radius:12px;padding:1.25rem 1.5rem;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.result-card.success{background:#064e3b66;border:1px solid var(--success-border)}.result-card.error{background:#4c1d954d;border:1px solid var(--error-border)}.status-badge-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:.8rem}.status-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.3rem .75rem;border-radius:20px;font-size:.85rem;font-weight:600}.success .status-badge{background:#34d39926;color:var(--success-text)}.error .status-badge{background:#f43f5e26;color:var(--error-text)}.latency-pill{font-size:.9rem;font-weight:700;color:#38bdf8}.result-details{display:flex;flex-direction:column;gap:.5rem;font-size:.9rem}.detail-item{display:flex;justify-content:space-between;color:var(--text-muted)}.detail-item span.val{color:var(--text-main);font-family:monospace}.history-section{margin-top:2rem;border-top:1px solid var(--card-border);padding-top:1.25rem}.history-title{font-size:.85rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.75rem}.history-list{display:flex;flex-direction:column;gap:.4rem;max-height:140px;overflow-y:auto}.history-item{display:flex;justify-content:space-between;align-items:center;padding:.4rem .75rem;background:#0f172a;border-radius:6px;font-size:.85rem}.history-time{color:var(--text-muted)}.info-section{margin-top:2rem;border-top:1px solid var(--card-border);padding-top:1.5rem}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.8rem}.info-card{background:#0f172a;border:1px solid #334155;border-radius:10px;padding:1rem}.info-card-header{display:flex;align-items:center;gap:.5rem;font-size:.85rem;font-weight:600;color:#38bdf8;margin-bottom:.6rem;text-transform:uppercase;letter-spacing:.04em}.info-card ul{list-style:none;display:flex;flex-direction:column;gap:.4rem;font-size:.85rem;color:var(--text-muted)}.info-card ul li{display:flex;justify-content:space-between}.info-card ul li strong{color:var(--text-main);font-weight:500}.tag-badge{display:inline-block;padding:.15rem .45rem;background:#1e293b;border:1px solid #475569;border-radius:4px;font-size:.75rem;color:#cbd5e1;font-family:monospace}