:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --text: #17202e;
  --muted: #5d6b82;
  --border: #dde3ee;
  --accent: #1f5eff;
  --accent-text: #ffffff;
  --danger: #c62828;
  --ok-bg: #e6f6ec;  --ok-fg: #14532d;
  --warn-bg: #fff4d6; --warn-fg: #6b4a00;
  --err-bg: #fde8e8;  --err-fg: #8a1c1c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 4px 16px rgba(16,24,40,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e131b;
    --surface: #161d29;
    --text: #e8edf5;
    --muted: #93a1b8;
    --border: #263044;
    --accent: #5b8cff;
    --accent-text: #0b1220;
    --danger: #ff7b7b;
    --ok-bg: #12301f;  --ok-fg: #9be3b4;
    --warn-bg: #3a2e0c; --warn-fg: #f3d27a;
    --err-bg: #3a1616;  --err-fg: #ffb0b0;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.7rem; margin: 0 0 .25rem; line-height: 1.2; }
h2 { font-size: 1.15rem; margin: 0 0 .5rem; }
.muted { color: var(--muted); }
a { color: var(--accent); }

/* Kopfzeile */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 650; }
.logo-img { display: block; height: 40px; width: auto; border-radius: 8px; }
.logo-img.big { height: auto; width: 132px; max-width: 60%; border-radius: 14px; margin: 0 auto 16px; }
.topbar nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: flex-end; }
.topbar nav a { text-decoration: none; color: var(--text); }
.topbar nav a:hover { color: var(--accent); }

/* Karten & Raster */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin: 0 0 16px; box-shadow: var(--shadow);
}
.card.narrow { max-width: 520px; margin-inline: auto; }
.card.empty { text-align: center; color: var(--muted); }
.hero { margin: 8px 0 20px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
a.card.tool { text-decoration: none; color: var(--text); transition: transform .12s, border-color .12s; margin: 0; }
a.card.tool:hover, a.card.tool:focus-visible { transform: translateY(-2px); border-color: var(--accent); }
a.card.tool .icon { font-size: 2rem; display: block; margin-bottom: 6px; }
a.card.tool p { margin: 0; color: var(--muted); font-size: .95rem; }
a.card.tool .ext { color: var(--muted); font-weight: 400; font-size: .9em; }

/* Anmeldung */
body.login main { display: grid; min-height: 100vh; place-items: center; padding-bottom: 24px; }
.login-card { width: 100%; max-width: 400px; text-align: center; }
.login-card form, .login-card .alert { text-align: left; }

/* Formulare */
form label { display: block; font-weight: 550; font-size: .92rem; margin-bottom: 14px; }
input[type=text], input[type=password], select {
  display: block; width: 100%; margin-top: 6px; padding: 11px 12px; font: inherit;
  color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
}
input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
button { font: inherit; cursor: pointer; border-radius: 10px; padding: 11px 16px; border: 1px solid transparent; }
button.primary { width: 100%; background: var(--accent); color: var(--accent-text); font-weight: 650; }
.form-grid button.primary { width: auto; }
button.secondary { background: transparent; border-color: var(--border); color: var(--text); }
button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
button.link { background: none; border: 0; padding: 0; color: var(--text); }
button.link:hover { color: var(--accent); }
form.inline { display: inline; margin: 0; }
.row-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.form-grid { display: grid; gap: 4px 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); align-items: end; }
.form-grid fieldset, .form-grid button { grid-column: 1 / -1; }
fieldset { border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; margin: 0 0 14px; }
legend { font-weight: 600; font-size: .9rem; padding: 0 6px; }
label.check { display: inline-flex; align-items: center; gap: 8px; margin: 4px 16px 4px 0; font-weight: 450; }
label.check input { width: auto; margin: 0; }

/* Hinweise */
.alert { padding: 11px 14px; border-radius: 10px; margin: 0 0 16px; font-size: .95rem; }
.alert.ok { background: var(--ok-bg); color: var(--ok-fg); }
.alert.warn { background: var(--warn-bg); color: var(--warn-fg); }
.alert.error { background: var(--err-bg); color: var(--err-fg); }
code.pw { display: inline-block; margin: 6px 0; padding: 4px 10px; border-radius: 8px; background: rgba(0,0,0,.08); font-size: 1.05rem; user-select: all; }
.badge { font-size: .7rem; padding: 2px 8px; border-radius: 999px; background: var(--warn-bg); color: var(--warn-fg); vertical-align: middle; margin-left: 6px; font-weight: 600; }
small.muted { font-weight: 400; }

@media (max-width: 520px) {
  .topbar { flex-wrap: wrap; }
  h1 { font-size: 1.4rem; }
}