/* GasBlender-Supportseite – gemeinsames Stylesheet.
   Keine externen Schriften, Skripte oder Netzwerkabhängigkeiten. */

:root {
    color-scheme: light dark;

    --gb-page-background: #f6f7f9;
    --gb-surface-background: #ffffff;
    --gb-surface-border: #c9ced6;
    --gb-text-primary: #16191d;
    --gb-text-secondary: #40464f;
    --gb-link: #0b4fa2;
    --gb-link-visited: #5a3286;
    --gb-focus-ring: #0b4fa2;
    --gb-accent-rule: #0b4fa2;

    --gb-content-width: 44rem;
    --gb-space-small: 0.5rem;
    --gb-space-medium: 1rem;
    --gb-space-large: 2rem;
    --gb-target-size: 2.75rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --gb-page-background: #121417;
        --gb-surface-background: #1c1f24;
        --gb-surface-border: #454b54;
        --gb-text-primary: #f2f4f7;
        --gb-text-secondary: #c3c9d2;
        --gb-link: #86b8f5;
        --gb-link-visited: #c6a8f0;
        --gb-focus-ring: #86b8f5;
        --gb-accent-rule: #86b8f5;
    }
}

@media (prefers-contrast: more) {
    :root {
        --gb-surface-border: currentColor;
    }
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0 var(--gb-space-medium) var(--gb-space-large);
    background-color: var(--gb-page-background);
    color: var(--gb-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
}

.gb-skip-link {
    position: absolute;
    left: -100vw;
    top: 0;
    padding: var(--gb-space-small) var(--gb-space-medium);
    background-color: var(--gb-surface-background);
    border: 1px solid var(--gb-surface-border);
    border-radius: 0.25rem;
}

.gb-skip-link:focus {
    left: var(--gb-space-medium);
    top: var(--gb-space-medium);
    z-index: 1;
}

.gb-page {
    max-width: var(--gb-content-width);
    margin: 0 auto;
}

.gb-masthead {
    padding-top: var(--gb-space-large);
    border-bottom: 2px solid var(--gb-accent-rule);
}

.gb-masthead h1 {
    margin: 0 0 var(--gb-space-small);
    font-size: 1.75rem;
    line-height: 1.25;
}

.gb-tagline {
    margin: 0 0 var(--gb-space-medium);
    color: var(--gb-text-secondary);
}

.gb-language-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gb-space-small);
    margin: 0;
    padding: 0 0 var(--gb-space-medium);
    list-style: none;
}

.gb-language-nav a,
.gb-language-nav span {
    display: inline-flex;
    align-items: center;
    min-height: var(--gb-target-size);
    padding: 0 var(--gb-space-medium);
    border: 1px solid var(--gb-surface-border);
    border-radius: 0.25rem;
    background-color: var(--gb-surface-background);
}

.gb-language-nav [aria-current="true"] {
    font-weight: 600;
    border-color: var(--gb-accent-rule);
}

main {
    display: block;
}

section {
    margin-top: var(--gb-space-large);
}

h2 {
    margin: 0 0 var(--gb-space-small);
    font-size: 1.3rem;
    line-height: 1.3;
}

p {
    margin: 0 0 var(--gb-space-medium);
}

.gb-link-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.gb-link-list li {
    border-top: 1px solid var(--gb-surface-border);
}

.gb-link-list li:last-child {
    border-bottom: 1px solid var(--gb-surface-border);
}

.gb-link-list a {
    display: block;
    min-height: var(--gb-target-size);
    padding: var(--gb-space-small) 0;
    font-weight: 600;
}

.gb-link-list .gb-link-note {
    display: block;
    padding-bottom: var(--gb-space-small);
    color: var(--gb-text-secondary);
    font-size: 0.9375rem;
}

a {
    color: var(--gb-link);
    text-decoration: underline;
    text-underline-offset: 0.15em;
}

a:visited {
    color: var(--gb-link-visited);
}

a:hover {
    text-decoration-thickness: 0.15em;
}

a:focus-visible,
.gb-skip-link:focus {
    outline: 3px solid var(--gb-focus-ring);
    outline-offset: 2px;
    border-radius: 0.15rem;
}

.gb-colophon {
    margin-top: var(--gb-space-large);
    padding-top: var(--gb-space-medium);
    border-top: 1px solid var(--gb-surface-border);
    color: var(--gb-text-secondary);
    font-size: 0.9375rem;
}

.gb-colophon p {
    margin: 0 0 var(--gb-space-small);
}

@media (min-width: 40rem) {
    body {
        padding: 0 var(--gb-space-large) var(--gb-space-large);
    }

    .gb-masthead h1 {
        font-size: 2.125rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}