:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1c2430;
  --muted: #6b7683;
  --line: #e2e6ea;
  --brand: #16456b;
  --accent: #1f7a4d;
  --danger: #b3261e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .75rem 1.25rem; background: var(--brand); color: #fff;
}
.topbar .brand { color: #fff; font-weight: 700; text-decoration: none; letter-spacing: .02em; }
.topbar nav a { color: #d9e6f2; text-decoration: none; margin-left: 1rem; }
.topbar nav a:hover { color: #fff; }
.container { max-width: 900px; margin: 1.5rem auto; padding: 0 1rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 1.25rem 1.5rem; margin-bottom: 1.25rem;
}
h1 { font-size: 1.4rem; margin: .2rem 0 1rem; }
label { display: block; font-weight: 600; margin: .75rem 0 .25rem; }
input, select, textarea {
  width: 100%; padding: .55rem .65rem; border: 1px solid var(--line);
  border-radius: 7px; font: inherit; background: #fff;
}
textarea { min-height: 6rem; resize: vertical; }
button, .btn {
  display: inline-block; padding: .6rem 1.1rem; border: 0; border-radius: 7px;
  background: var(--brand); color: #fff; font: inherit; font-weight: 600;
  cursor: pointer; text-decoration: none;
}
button:hover, .btn:hover { filter: brightness(1.08); }
.btn-muted { background: #55606c; }
.msg { padding: .7rem .9rem; border-radius: 7px; margin: .5rem 0 1rem; }
.msg-error { background: #fdecea; color: var(--danger); border: 1px solid #f5c6c2; }
.msg-ok { background: #e8f5ee; color: var(--accent); border: 1px solid #bfe3cf; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .5rem; border-bottom: 1px solid var(--line); }
.badge {
  display: inline-block; padding: .15rem .55rem; border-radius: 999px;
  font-size: .8rem; font-weight: 600; background: #eef1f4; color: var(--muted);
}
.muted { color: var(--muted); }
.topbar nav { display: flex; align-items: center; gap: 1rem; }
.logout-form { display: inline; margin: 0; }
.linkbtn {
  background: none; border: 0; padding: 0; margin-left: 1rem; color: #d9e6f2;
  font: inherit; cursor: pointer;
}
.linkbtn:hover { color: #fff; text-decoration: underline; }