*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f5f5f3;
  --card: #ffffff;
  --border: rgba(0,0,0,0.08);
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #1a5fa8;
  --accent-bg: #eff6ff;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --fail: #b91c1c;
  --fail-bg: #fee2e2;
  --warn: #92400e;
  --warn-bg: #fef3c7;
  --code-bg: #1a1a1a;
  --code-text: #d4d4d4;
  --radius: 12px;
  --mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
  line-height: 1.6;
  padding: 2rem 1rem;
}
.container { max-width: 880px; margin: 0 auto; }

/* Hero */
.hero { padding: 1rem 0 2rem; text-align: center; }
.hero h1 { font-size: 36px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 8px; }
.hero .lead { font-size: 17px; color: var(--muted); max-width: 600px; margin: 0 auto; }

/* Cards */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.25rem; }
.card h2 { font-size: 20px; font-weight: 600; margin-bottom: 0.75rem; }
.card p { margin-bottom: 0.5rem; }
.card p:last-child { margin-bottom: 0; }
.card ul, .card ol { margin: 0.5rem 0 0.5rem 1.5rem; }
.card li { margin-bottom: 4px; }
code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-family: var(--mono); font-size: 13px; }
pre {
  background: var(--code-bg); color: var(--code-text);
  padding: 12px 14px; border-radius: 8px;
  font-family: var(--mono); font-size: 13px; line-height: 1.6;
  overflow-x: auto; margin: 8px 0; white-space: pre;
}

/* Downloads */
.downloads { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; margin-top: 12px; }
.download-btn {
  display: block; padding: 14px 16px;
  background: var(--accent-bg); color: var(--accent);
  border: 1px solid rgba(26,95,168,0.2); border-radius: 10px;
  text-decoration: none; text-align: center;
  transition: background 0.15s, transform 0.1s;
}
.download-btn:hover { background: #dbeafe; }
.download-btn:active { transform: scale(0.98); }
.dl-os { font-size: 15px; font-weight: 600; }
.dl-arch { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* Instructions */
.instructions details {
  border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 8px; overflow: hidden;
}
.instructions summary {
  cursor: pointer; padding: 12px 16px;
  font-weight: 600; background: var(--bg);
  list-style: none; user-select: none;
}
.instructions summary::-webkit-details-marker { display: none; }
.instructions summary::before { content: '▸ '; transition: transform 0.15s; }
.instructions details[open] summary::before { content: '▾ '; }
.instructions details > *:not(summary) { padding: 14px 16px 16px; }
.instructions ol, .instructions ul { padding-left: 1.5rem; }
.instructions li { margin-bottom: 6px; }
.instructions ul ul { margin-top: 4px; }

/* Footer */
footer { text-align: center; padding: 2rem 0 1rem; color: var(--muted); font-size: 13px; }

/* Report page */
.report-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; }
.meta-item { background: var(--bg); border-radius: 8px; padding: 10px 12px; }
.meta-label { font-size: 11px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.04em; margin-bottom: 2px; }
.meta-value { font-size: 14px; font-weight: 500; font-family: var(--mono); }

.server-card { border: 1px solid var(--border); border-radius: 10px; margin-bottom: 12px; overflow: hidden; }
.server-header { padding: 12px 16px; display: flex; align-items: center; gap: 12px; background: var(--bg); }
.server-title { font-weight: 600; flex: 1; }
.server-addr { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.server-body { padding: 14px 16px; }

.proto-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.proto-item { background: var(--bg); border-radius: 8px; padding: 10px 12px; }
.proto-name { font-size: 11px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.04em; }
.proto-val { font-size: 15px; font-weight: 600; margin-top: 2px; display: flex; align-items: center; gap: 6px; }

.badge { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 4px; display: inline-block; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.fail { background: var(--fail-bg); color: var(--fail); }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.ok { background: var(--ok); }
.dot.fail { background: var(--fail); }

.trace-block { margin-top: 12px; }
.trace-label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; margin-bottom: 6px; letter-spacing: 0.05em; }
.trace {
  background: var(--code-bg); color: var(--code-text);
  border-radius: 8px; padding: 12px 14px;
  font-family: var(--mono); font-size: 12px;
  line-height: 1.7; overflow-x: auto;
  white-space: pre;
}
.trace .hop-ok { color: #86efac; }
.trace .hop-fail { color: #f87171; }

.copy-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 6px;
  font-size: 12px; cursor: pointer;
  color: var(--text);
}
.copy-btn:hover { background: var(--bg); }
.copy-btn.copied { background: var(--ok-bg); color: var(--ok); border-color: var(--ok); }

/* Admin */
.admin-filters { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 8px; margin-bottom: 1rem; }
.admin-filters input {
  padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; width: 100%;
  background: var(--card); color: var(--text);
}
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.admin-table th { font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.admin-table tbody tr { cursor: pointer; }
.admin-table tbody tr:hover { background: var(--bg); }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 8px; margin-bottom: 1rem; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.stat-label { font-size: 11px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.05em; }
.stat-value { font-size: 22px; font-weight: 600; margin-top: 2px; }