/*
 * Zweck: Farbvariablen, Reset, Typografie und Seitenrahmen (Kopf-/Fußzeile).
 * Verwendet von: app/views/partials/head.php, public/diagnose-view.php
 * Abhängigkeiten: keine (keine CDN, nur Systemschriften)
 */

:root {
    --color-text: #1f2933;
    --color-text-muted: #52606d;
    --color-background: #f5f7fa;
    --color-surface: #ffffff;
    --color-border: #d9e2ec;
    --color-primary: #1d4e89;
    --color-success: #1e7a46;
    --color-success-light: #e3f5ea;
    --color-error: #b42318;
    --color-error-light: #fde8e7;
    --color-warning: #8a5a00;
    --color-warning-light: #fff4d6;
    --radius: 6px;
    --spacing: 1rem;
}

*, *::before, *::after { box-sizing: border-box; }

html { font-size: 100%; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--color-primary); }

h1 { font-size: 1.6rem; margin: 0 0 var(--spacing); }
h2 { font-size: 1.2rem; margin: calc(var(--spacing) * 1.5) 0 0.5rem; }

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

main.container { flex: 1; padding-block: calc(var(--spacing) * 2); }

.site-header { background: var(--color-primary); color: #fff; padding-block: 0.75rem; }
.site-header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1rem; }
.main-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin-right: auto; }
.main-nav a { color: #fff; text-decoration: none; opacity: 0.85; }
.main-nav a:hover, .main-nav a[aria-current="page"] { opacity: 1; text-decoration: underline; }
.user-box a { color: #fff; }
.user-box { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; font-size: 0.9rem; }
.user-box form { margin: 0; }
.brand { color: #fff; font-weight: 600; font-size: 1.15rem; text-decoration: none; }
.site-footer { color: var(--color-text-muted); font-size: 0.875rem; padding-block: var(--spacing); border-top: 1px solid var(--color-border); }

@media (max-width: 600px) {
    h1 { font-size: 1.35rem; }
}