:root {
  --bg: #0a0c10;
  --panel: #12151c;
  --panel-2: #171b24;
  --border: #232833;
  --text: #eef1f6;
  --muted: #838ea1;
  --accent: #6ee7d8;
  --accent-dim: rgba(110, 231, 216, 0.12);
  --ok: #4ade80;
  --error: #f87171;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1080px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }
.login-container { max-width: 400px; margin-top: 10vh; }

h1 { font-size: 1.65rem; font-weight: 700; letter-spacing: -0.01em; margin: 0.2rem 0 1.4rem; }
h2 {
  font-size: 0.95rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--muted); margin: 2.4rem 0 0.8rem; padding-top: 1.4rem; border-top: 1px solid var(--border);
}
.eyebrow {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.5rem;
}
.muted { color: var(--muted); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navigation */
.topnav {
  display: flex; align-items: center; gap: 1.4rem;
  padding: 0.9rem 1.75rem; background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10; backdrop-filter: blur(8px);
}
.topnav a { color: var(--text); font-size: 0.9rem; }
.topnav a:hover { color: var(--accent); text-decoration: none; }
.topnav .brand { font-weight: 700; color: var(--text); letter-spacing: -0.01em; }
.topnav .brand:hover { text-decoration: none; }
.topnav .spacer { flex: 1; }
.topnav .whoami { color: var(--muted); font-size: 0.82rem; }

/* Cards / forms */
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem; max-width: 480px; display: flex; flex-direction: column; gap: 0.55rem;
}
label { font-size: 0.8rem; color: var(--muted); margin-top: 0.5rem; }
input, select, textarea, button {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.55rem 0.7rem; font-size: 0.92rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
button {
  background: var(--accent); border: none; color: #06201c; font-weight: 600; cursor: pointer;
  margin-top: 0.9rem; padding: 0.6rem 1rem; transition: opacity 0.15s ease;
}
button:hover { opacity: 0.88; }
button.danger { background: var(--error); color: #2b0908; margin-left: 0.5rem; }

.codebox {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 0.15rem 0.5rem; font-family: "SF Mono", Menlo, monospace; color: var(--accent);
}

/* Status card grid for the device dashboard */
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem;
}
.panel-card {
  display: block; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem; color: var(--text); transition: border-color 0.15s ease, transform 0.15s ease;
}
.panel-card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); }
.panel-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.3rem; }
.panel-card-name { font-weight: 600; font-size: 1.02rem; }
.panel-card-addr { color: var(--muted); font-size: 0.82rem; margin-bottom: 0.9rem; font-family: "SF Mono", Menlo, monospace; }
.panel-card-row {
  display: flex; justify-content: space-between; font-size: 0.85rem;
  padding: 0.35rem 0; border-top: 1px solid var(--border);
}

/* Tables */
.table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
.table th, .table td {
  text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); font-size: 0.88rem;
}
.table th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }
.table tr:hover td { background: var(--panel-2); }

.badge {
  padding: 0.18rem 0.6rem; border-radius: 999px; font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.02em;
}
.badge-ok { background: rgba(74, 222, 128, 0.14); color: var(--ok); }
.badge-error { background: rgba(248, 113, 113, 0.14); color: var(--error); }
.badge-muted { background: rgba(131, 142, 161, 0.14); color: var(--muted); }

.error { color: var(--error); font-size: 0.88rem; }

.diff {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.1rem; overflow-x: auto; font-size: 0.82rem; font-family: "SF Mono", Menlo, monospace;
  white-space: pre-wrap; line-height: 1.5;
}
.diff-add { color: var(--ok); }
.diff-del { color: var(--error); }