:root {
    --bg: #0f1420;
    --panel: #161d2e;
    --panel-border: #2a3550;
    --text: #e6ebf5;
    --text-muted: #9aa7c2;
    --accent: #4f8cff;
    --accent-strong: #7db0ff;
    --ok: #35c98f;
    --warn: #f2b84b;
    --err: #f2555a;
    --radius: 10px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.5;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
    border-bottom: 1px solid var(--panel-border);
    background: var(--panel);
}

.nav-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    padding: 14px 20px;
}

.brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text);
}

.tool-nav {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.92rem;
}

.tool-nav a { color: var(--text-muted); }
.tool-nav a.active, .tool-nav a:hover { color: var(--accent-strong); }

main.container { padding: 32px 20px 60px; }

.hero { margin-bottom: 28px; }
.hero h1 { margin-bottom: 6px; }
.hero p { color: var(--text-muted); max-width: 60ch; }

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 16px;
}

.tool-card {
    display: block;
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 18px;
    color: var(--text);
}

.tool-card:hover { border-color: var(--accent); text-decoration: none; }
.tool-card h2 { margin: 0 0 6px; font-size: 1.05rem; }
.tool-card p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

.panel h1 { margin-top: 0; }
.tool-description { color: var(--text-muted); margin-top: -8px; margin-bottom: 20px; }

form.lookup-form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.85rem; color: var(--text-muted); }

input[type=text], select {
    background: #0c1120;
    border: 1px solid var(--panel-border);
    color: var(--text);
    border-radius: 6px;
    padding: 10px 12px;
    font-size: 0.95rem;
    min-width: 240px;
}

input[type=text]:focus, select:focus {
    outline: none;
    border-color: var(--accent);
}

button {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 18px;
    font-size: 0.95rem;
    cursor: pointer;
}

button:hover { background: var(--accent-strong); }

.alert {
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 0.92rem;
}

.alert-error { background: rgba(242, 85, 90, 0.12); border: 1px solid var(--err); color: #ffb3b5; }
.alert-warn  { background: rgba(242, 184, 75, 0.12); border: 1px solid var(--warn); color: #ffd98a; }
.alert-ok    { background: rgba(53, 201, 143, 0.12); border: 1px solid var(--ok); color: #8ff0cc; }
.alert-info  { background: rgba(79, 140, 255, 0.12); border: 1px solid var(--accent); color: var(--accent-strong); }

table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--panel-border); }
th { color: var(--text-muted); font-weight: 600; }
td.mono, pre.mono { font-family: var(--mono); }

pre.raw {
    background: #0c1120;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.result-block { margin-top: 24px; }
.result-block h2 { font-size: 1.1rem; margin-bottom: 4px; }

.summary-stats { display: flex; gap: 24px; flex-wrap: wrap; margin: 16px 0; }
.stat { background: #0c1120; border: 1px solid var(--panel-border); border-radius: 8px; padding: 12px 16px; min-width: 100px; }
.stat .value { font-size: 1.3rem; font-weight: 700; }
.stat .label { color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }

.chart-wrap { margin-top: 10px; }
.chart-wrap svg { width: 100%; height: auto; display: block; }
.bar-label { fill: var(--text-muted); font-size: 10px; font-family: var(--mono); }
.bar-value { fill: var(--text); font-size: 10px; font-family: var(--mono); }

.hop-row { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; font-family: var(--mono); font-size: 0.85rem; }
.hop-num { width: 28px; color: var(--text-muted); text-align: right; }
.hop-host { width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hop-bar-track { flex: 1; background: #0c1120; border-radius: 4px; height: 16px; overflow: hidden; }
.hop-bar-fill { background: var(--accent); height: 100%; }
.hop-ms { width: 70px; text-align: right; color: var(--text-muted); }

.site-footer {
    border-top: 1px solid var(--panel-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 20px 0;
    margin-top: 40px;
}

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge-ok { background: rgba(53, 201, 143, 0.15); color: var(--ok); }
.badge-mismatch { background: rgba(242, 85, 90, 0.15); color: var(--err); }

@media (max-width: 640px) {
    .hop-host { width: 140px; }
    form.lookup-form { flex-direction: column; align-items: stretch; }
    input[type=text], select { min-width: 0; width: 100%; }
}