:root {
  --bg: #f5f6f8; --fg: #1c2733; --card: #ffffff; --line: #d8dee6;
  --accent: #1668b3; --muted: #5b6b7b;
  --font: system-ui, sans-serif;
  --heading-font: var(--font); --heading-weight: 700; --heading-transform: none;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  font: 16px/1.5 var(--font); background: var(--bg); color: var(--fg);
}
h1, h2, .brand {
  font-family: var(--heading-font); font-weight: var(--heading-weight);
  text-transform: var(--heading-transform);
}
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.7rem 1.2rem; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { color: var(--fg); text-decoration: none; }
header nav a { margin-left: 1rem; }
header .user { color: var(--muted); }
.langs { margin-left: 1rem; }
.langs .lang { color: var(--muted); text-decoration: none; margin-left: 0.4rem; font-size: 0.85rem; }
.langs .lang.active { color: var(--accent); font-weight: 700; }
main { flex: 1; width: min(64rem, 100%); margin: 0 auto; padding: 1.5rem 1.2rem; }
footer { padding: 0.6rem 1.2rem; color: var(--muted); font-size: 0.85rem; }
a { color: var(--accent); }
.crumbs { color: var(--muted); }

.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1rem; }
.tile {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 1rem 1.2rem; color: var(--fg); text-decoration: none;
}
.tile:hover { border-color: var(--accent); }
.tile h2 { margin: 0 0 0.3rem; font-size: 1.1rem; }
.tile p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.kind {
  display: inline-block; margin-top: 0.6rem; padding: 0.1rem 0.5rem;
  border-radius: 99px; font-size: 0.75rem; background: var(--bg); color: var(--muted);
}
.kind-admin { background: #fdecea; color: #a13a2e; }
.kind-supervision { background: #e8f1fa; color: #1668b3; }
.kind-demo { background: #eef7ec; color: #3d7a32; }

.login-box { max-width: 22rem; margin: 4rem auto; background: var(--card);
  border: 1px solid var(--line); border-radius: 8px; padding: 1.5rem; }
.login-box h1 { margin-top: 0; font-size: 1.3rem; }
.login-box label { display: block; margin-bottom: 0.8rem; }
.login-box input { display: block; width: 100%; margin-top: 0.2rem; padding: 0.45rem;
  border: 1px solid var(--line); border-radius: 6px; font: inherit; }
.login-box button { width: 100%; padding: 0.55rem; border: 0; border-radius: 6px;
  background: var(--accent); color: #fff; font: inherit; cursor: pointer; }
.login-box button:hover { background: var(--accent-hover, var(--accent)); }
.error { color: #a13a2e; }