*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#3B82F6;--primary-light:#60A5FA;--accent:#10B981;--accent-light:#34D399;
  --bg:#0F172A;--bg-surface:#1E293B;--bg-card:#1E293B;--bg-elevated:#334155;
  --text:#F1F5F9;--text-secondary:#94A3B8;--text-muted:#64748B;
  --border:rgba(59,130,246,0.15);--border-accent:rgba(59,130,246,0.35);
  --success:#10B981;--warning:#F59E0B;--error:#EF4444;
  --radius:10px;--shadow:0 4px 24px rgba(0,0,0,0.4);
  --transition:0.2s cubic-bezier(0.4,0,0.2,1);
}
[data-theme="light"]{
  --bg:#F8FAFC;--bg-surface:#FFFFFF;--bg-card:#FFFFFF;--bg-elevated:#F1F5F9;
  --text:#0F172A;--text-secondary:#475569;--text-muted:#94A3B8;
  --border:rgba(59,130,246,0.12);--border-accent:rgba(59,130,246,0.25);
  --shadow:0 4px 24px rgba(0,0,0,0.08);
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
.app{max-width:960px;margin:0 auto;padding:2rem 1.5rem;min-height:100vh;display:flex;flex-direction:column}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}
.logo{display:flex;align-items:center;gap:0.75rem}
.logo h1{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.header-actions{display:flex;gap:0.5rem}
.icon-btn{width:40px;height:40px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}
.icon-btn:hover{border-color:var(--primary);color:var(--text);background:rgba(59,130,246,0.08)}
.search-section{margin-bottom:1.5rem}
.search-bar{display:flex;gap:0.5rem;margin-bottom:0.5rem}
.search-bar input{flex:1;padding:0.875rem 1rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:inherit;font-size:1rem;transition:all var(--transition)}
.search-bar input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,130,246,0.15)}
.search-bar select{padding:0.875rem 2.25rem 0.875rem 1rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:'JetBrains Mono',monospace;font-size:0.875rem;font-weight:500;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 0.75rem center;cursor:pointer;transition:all var(--transition)}
.search-bar select:focus{outline:none;border-color:var(--primary)}
.btn{padding:0.875rem 1.5rem;border:none;border-radius:var(--radius);font-family:inherit;font-size:0.875rem;font-weight:600;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:0.5rem;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),#2563EB);color:#fff;box-shadow:0 2px 12px rgba(59,130,246,0.35)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(59,130,246,0.5)}
.btn-outline{background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary)}
.btn-outline:hover{border-color:var(--primary);color:var(--text);background:rgba(59,130,246,0.06)}
.btn-full{width:100%}
.search-hints{font-size:0.75rem;color:var(--text-muted);display:flex;align-items:center;gap:0.5rem}
.kbd{font-family:'JetBrains Mono',monospace;font-size:0.6875rem;padding:2px 6px;border:1px solid var(--border);border-radius:4px;background:var(--bg-elevated)}
.separator{color:var(--text-muted)}
.summary-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:0.75rem;margin-bottom:1rem}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;display:flex;align-items:center;gap:0.75rem;transition:all var(--transition)}
.card:hover{border-color:var(--border-accent);transform:translateY(-2px)}
.card-icon{width:40px;height:40px;border-radius:8px;background:rgba(59,130,246,0.1);display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0}
.card-icon.propagation-icon{background:rgba(16,185,129,0.1);color:var(--accent)}
.card-value{font-size:1.25rem;font-weight:700;font-family:'JetBrains Mono',monospace}
.card-label{font-size:0.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.04em}
.action-bar{display:flex;gap:0.5rem;margin-bottom:1rem}
.results-section{flex:1}
.results-header{display:flex;align-items:baseline;gap:1rem;margin-bottom:1rem}
.results-header h2{font-size:1.125rem;font-weight:700}
.results-domain{font-family:'JetBrains Mono',monospace;font-size:0.875rem;color:var(--primary-light)}
.table-wrapper{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border)}
.results-table{width:100%;border-collapse:collapse;font-size:0.875rem}
.results-table th{text-align:left;padding:0.75rem 1rem;background:var(--bg-elevated);color:var(--text-secondary);font-weight:600;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em;border-bottom:1px solid var(--border);white-space:nowrap}
.results-table td{padding:0.625rem 1rem;border-bottom:1px solid var(--border);color:var(--text-secondary);white-space:nowrap}
.results-table tbody tr{transition:background var(--transition)}
.results-table tbody tr:hover{background:rgba(59,130,246,0.04)}
.results-table tbody tr:last-child td{border-bottom:none}
.status-badge{display:inline-flex;align-items:center;gap:0.375rem;padding:0.25rem 0.625rem;border-radius:100px;font-size:0.75rem;font-weight:600}
.status-badge.ok{background:rgba(16,185,129,0.12);color:var(--success)}
.status-badge.fail{background:rgba(239,68,68,0.12);color:var(--error)}
.status-badge.pending{background:rgba(245,158,11,0.12);color:var(--warning)}
.status-dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.mono{font-family:'JetBrains Mono',monospace;font-size:0.8125rem;color:var(--text)}
.flag{margin-right:0.375rem}
.history-panel{position:fixed;top:0;right:0;width:340px;height:100vh;background:var(--bg-surface);border-left:1px solid var(--border);box-shadow:-8px 0 30px rgba(0,0,0,0.3);z-index:100;display:flex;flex-direction:column;padding:1.5rem;animation:slideIn 0.3s ease}
.history-panel.hidden{display:none}
@keyframes slideIn{from{transform:translateX(100%)}to{transform:translateX(0)}}
.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.panel-header h3{font-size:1.125rem;font-weight:700}
.panel-body{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:0.5rem;margin-bottom:1rem}
.history-item{padding:0.75rem;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all var(--transition)}
.history-item:hover{border-color:var(--primary);background:rgba(59,130,246,0.06)}
.history-item .domain{font-weight:600;font-size:0.875rem}
.history-item .meta{font-size:0.75rem;color:var(--text-muted);margin-top:2px}
.drop-overlay{position:fixed;inset:0;background:rgba(15,23,42,0.9);z-index:200;display:flex;align-items:center;justify-content:center}
.drop-overlay.hidden{display:none}
.drop-content{text-align:center;color:var(--primary-light)}
.drop-content p{margin-top:0.75rem;font-size:1.125rem;font-weight:600}
.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--bg-card);border:1px solid var(--border-accent);border-radius:var(--radius);padding:0.75rem 1.5rem;font-size:0.875rem;font-weight:500;box-shadow:var(--shadow);z-index:300;transition:transform 0.3s cubic-bezier(0.34,1.56,0.64,1);pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.hidden{display:block;transform:translateX(-50%) translateY(100px)}
.hidden{display:none!important}
.footer{margin-top:auto;padding-top:2rem;text-align:center;font-size:0.75rem;color:var(--text-muted)}
.loading-row td{text-align:center;padding:2rem;color:var(--text-muted)}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 0.6s linear infinite;margin-right:0.5rem;vertical-align:middle}
@media(max-width:768px){
  .summary-cards{grid-template-columns:repeat(2,1fr)}
  .search-bar{flex-wrap:wrap}
  .search-bar input{min-width:100%}
  .action-bar{flex-wrap:wrap}
  .history-panel{width:100%}
}
@media(max-width:480px){
  .app{padding:1rem}
  .logo h1{font-size:1.25rem}
  .summary-cards{grid-template-columns:1fr}
  .search-hints{display:none}
}