:root {
  --blue: #12658f;
  --blue-dark: #0d4c6b;
  --ink: #1a1a1a;
  --muted: #667;
  --line: #e3e6ea;
  --bg: #f4f6f8;
  --ok-bg: #dcfce7; --ok-bd: #86efac;
  --err-bg: #fee2e2; --err-bd: #fca5a5;
}

* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0; color: var(--ink); background: var(--bg);
}

/* ---- Login ---- */
.login-body {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--blue);
}
.login-card {
  background: #fff; padding: 2rem; border-radius: 12px; width: 340px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.login-card h1 { color: var(--blue); font-size: 1.3rem; margin: 0 0 .25rem; }
.login-card .sub { color: var(--muted); margin: 0 0 1.25rem; }
.login-card label { display: block; font-size: .85rem; color: #444; margin-bottom: .75rem; }
.login-card input {
  width: 100%; padding: .6rem; margin-top: .25rem; border: 1px solid #ccc;
  border-radius: 6px; font: inherit;
}
.login-card button, .btn, button[type=submit] {
  background: var(--blue); color: #fff; border: 0; border-radius: 6px;
  padding: .6rem 1rem; font: inherit; cursor: pointer;
}
.login-card button { width: 100%; margin-top: .5rem; }
.login-card button:hover, button[type=submit]:hover { background: var(--blue-dark); }

/* ---- App chrome ---- */
.topbar {
  background: #fff; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 1.5rem;
  padding: .75rem 1.5rem;
}
.topbar .brand { font-weight: 700; color: var(--blue); }
.topbar nav { display: flex; align-items: center; gap: 1.25rem; margin-left: auto; font-size: .92rem; }
.topbar nav a { color: var(--ink); text-decoration: none; }
.topbar nav a:hover { color: var(--blue); }
.topbar .who { color: var(--muted); font-size: .82rem; }
.topbar .logout { color: var(--blue); }

main { max-width: 980px; margin: 0 auto; padding: 1.5rem; }
h1 { font-size: 1.5rem; }
.lead { color: var(--muted); }

/* Cards */
.cards { display: flex; gap: 1rem; flex-wrap: wrap; margin: 1rem 0; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 1.25rem 1.5rem; min-width: 150px;
}
.card .num { font-size: 2rem; font-weight: 700; color: var(--blue); }
.card .lbl { color: var(--muted); font-size: .9rem; }

.btn { text-decoration: none; display: inline-block; }

/* Tables */
table.grid { border-collapse: collapse; width: 100%; background: #fff; margin-top: .5rem; font-size: .92rem; }
table.grid th, table.grid td { border: 1px solid var(--line); padding: .5rem .7rem; text-align: left; }
table.grid th { background: #fafbfc; }

/* Forms in panels */
.two-col { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-top: 1.5rem; }
.panel {
  flex: 1; min-width: 300px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; padding: 1.25rem;
}
.panel h2 { margin-top: 0; font-size: 1.05rem; }
.panel label { display: block; font-size: .85rem; color: #444; margin-bottom: .75rem; }
.panel input, .panel select {
  width: 100%; padding: .5rem; margin-top: .25rem; border: 1px solid #ccc;
  border-radius: 6px; font: inherit;
}

.notice { background: var(--ok-bg); border: 1px solid var(--ok-bd); padding: .5rem .75rem; border-radius: 6px; }
.error  { background: var(--err-bg); border: 1px solid var(--err-bd); padding: .5rem .75rem; border-radius: 6px; }

/* Device actions + cert issue */
td.actions { display: flex; gap: .5rem; }
td.actions form { margin: 0; }
td.actions button {
  background: #fff; color: var(--ink); border: 1px solid #ccc;
  border-radius: 6px; padding: .3rem .6rem; font-size: .85rem; cursor: pointer;
}
td.actions button:hover { background: #f2f4f6; }
td.actions button.danger { color: #b91c1c; border-color: #fca5a5; }
td.actions button.danger:hover { background: var(--err-bg); }

.cert-issue textarea {
  width: 100%; font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: .78rem; margin-top: .25rem; border: 1px solid #ccc; border-radius: 6px; padding: .5rem;
}
.panel label { display: block; margin-bottom: .75rem; }