:root {
    color-scheme: light;

    --background: #f5f6f8;
    --card: #ffffff;
    --text: #222222;
    --muted: #666666;
    --border: #d8d8d8;

    --accent: #0082c9;
    --accent-dark: #006aa3;
    --accent-soft: rgba(0, 130, 201, 0.16);

    --error-bg: #fff4f4;
    --error-border: #e5a3a3;
    --error-text: #8a1f1f;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--background);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

main {
    width: 100%;
    max-width: 34rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.08);
}

.vereinsbanner {
    display: block;
    margin: 0 auto 1.5rem;
    text-align: center;
}

.vereinsbanner img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

h1 {
    margin: 0 0 0.75rem;
    font-size: clamp(1.8rem, 5vw, 2.4rem);
    line-height: 1.15;
    text-align: center;
    color: var(--text);
}

.hint {
    margin: 0 0 1.5rem;
    color: var(--muted);
    text-align: center;
    line-height: 1.5;
}

form {
    display: grid;
    gap: 0.8rem;
}

label {
    font-weight: 700;
}

input {
    width: 100%;
    font: inherit;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    text-transform: uppercase;
    background: #ffffff;
    color: var(--text);
}

input:focus {
    outline: 3px solid var(--accent-soft);
    border-color: var(--accent);
}

button {
    font: inherit;
    font-weight: 700;
    color: #ffffff;
    background: var(--accent);
    border: 0;
    border-radius: 0.65rem;
    padding: 0.9rem 1rem;
    cursor: pointer;
}

button:hover,
button:focus {
    background: var(--accent-dark);
}

.error {
    margin: 1.25rem 0 0;
    padding: 0.9rem 1rem;
    border: 1px solid var(--error-border);
    border-radius: 0.65rem;
    color: var(--error-text);
    background: var(--error-bg);
    line-height: 1.5;
}

footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

footer a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 0.18em;
}

footer a:hover,
footer a:focus {
    color: var(--accent-dark);
}