:root {
  --navy: #0b3a66; --body: #333; --gray: #6a6a6a; --line: #c8ced7; --bg: #f5f7fa; --card: #fff;
  --netA: #1f5fa8; --netB: #b5651d; --green: #2e7d32; --yellow: #f2c12e; --red: #c62828;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Calibri, "Segoe UI", Arial, sans-serif; color: var(--body); background: var(--bg); }
header { background: var(--navy); color: #fff; padding: 10px 24px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
header .brand { font-weight: 700; font-size: 18px; }
header nav a { color: #dfe8f3; text-decoration: none; margin-right: 14px; font-size: 14px; }
header nav a:hover, header nav a.on { color: #fff; text-decoration: underline; }
header .who { margin-left: auto; font-size: 13px; }
header .who button { margin-left: 8px; }
.banner { background: #fff4d6; border-bottom: 1px solid #e6cf8a; padding: 6px 24px; font-size: 13px; }
main { max-width: 1180px; margin: 0 auto; padding: 20px 16px 40px; }
h1 { color: var(--navy); font-size: 26px; margin: 8px 0 4px; }
h2 { color: var(--navy); font-size: 19px; margin: 22px 0 8px; }
p.lead { font-size: 17px; margin: 4px 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.tile { display: block; text-decoration: none; color: inherit; }
.tile:hover { border-color: var(--navy); box-shadow: 0 2px 8px rgba(11, 58, 102, .15); }
.tile b { color: var(--navy); font-size: 17px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; vertical-align: top; }
th { background: #e6eef7; }
button { font: inherit; padding: 6px 12px; border: 1px solid var(--navy); background: #fff; color: var(--navy); border-radius: 5px; cursor: pointer; }
button.primary { background: var(--navy); color: #fff; }
button.stop { background: var(--red); border-color: var(--red); color: #fff; font-weight: 700; }
button:disabled { opacity: .45; cursor: default; }
.lamp { display: inline-block; width: 18px; height: 18px; border-radius: 50%; vertical-align: middle; margin-right: 6px; border: 1px solid #0002; }
.g { background: var(--green); } .y { background: var(--yellow); } .r { background: var(--red); } .off { background: #ccc; }
.small { font-size: 13px; color: var(--gray); }
.mono { font-family: Consolas, monospace; }
footer { font-size: 12px; color: var(--gray); text-align: center; padding: 18px; }