:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --accent: #0057b8;
    --accent-hover: #004596;
    --text: #15213b;
    --text-muted: #5b6b86;
    --border: #dde3ec;
    --red: #c62828;
    /* Logofarben, identisch mit public/img/favicon.svg — die Kachel in der
       Navigation und im Login ist dasselbe Zeichen wie im Browser-Tab. */
    --mark-bg: #003399;
    --mark-fg: #ffcc00;
    --shadow: 0 1px 2px rgba(21, 33, 59, 0.06), 0 8px 24px rgba(21, 33, 59, 0.06);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg); color: var(--text);
    min-height: 100vh; line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ------- nav ------- */
.nav {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; padding: 1.1rem 2rem;
    background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand {
    display: flex; align-items: center; gap: 0.6rem;
    font-weight: 700; font-size: 1.05rem; color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand-mark {
    display: grid; place-items: center;
    width: 28px; height: 28px; border-radius: 7px;
    background: var(--mark-bg); color: var(--mark-fg);
    font-weight: 700; font-size: 1rem;
}
.nav-links { display: flex; gap: 1.25rem; align-items: center; font-size: 0.9rem; }
.nav-user { color: var(--text-muted); }

/* ------- page ------- */
.page { max-width: 1100px; margin: 0 auto; padding: 3rem 2rem; }
.page h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }

/* ------- login ------- */
body.centered { display: flex; align-items: center; justify-content: center; padding: 2rem; }
.login-box {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 2rem; width: 360px; max-width: 100%;
    box-shadow: var(--shadow);
}
.login-mark {
    display: grid; place-items: center;
    width: 44px; height: 44px; border-radius: 11px; margin-bottom: 1.1rem;
    background: var(--mark-bg); color: var(--mark-fg);
    font-size: 1.5rem; font-weight: 700;
}
.login-box h1 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.01em; }
.login-box .sub { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.login-box label {
    display: block; font-size: 0.8rem; font-weight: 600;
    color: var(--text-muted); margin-bottom: 0.35rem;
}
.login-box input {
    width: 100%; margin-bottom: 1rem; padding: 0.6rem 0.75rem;
    background: var(--surface); color: var(--text);
    border: 1px solid var(--border); border-radius: 8px;
    font-size: 0.95rem; font-family: inherit;
}
.login-box input:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 87, 184, 0.14);
}
.login-box button {
    width: 100%; padding: 0.7rem 1rem; border: none; border-radius: 8px;
    background: var(--accent); color: #fff;
    font-size: 0.95rem; font-weight: 600; font-family: inherit; cursor: pointer;
}
.login-box button:hover { background: var(--accent-hover); }

/* Inline error, rendered by the server — never a browser dialog. */
.error {
    background: #fdecec; border: 1px solid #f3c2c2; color: var(--red);
    border-radius: 8px; padding: 0.6rem 0.75rem;
    font-size: 0.85rem; margin-bottom: 1rem;
}