:root {
    color-scheme: light dark;
    --mud-primary: #594ae2;
    --surface: #ffffff;
    --text: rgba(0, 0, 0, 0.87);
    --border: rgba(0, 0, 0, 0.23);
    --page-bg: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
    :root {
        --surface: #1e1e2d;
        --text: rgba(255, 255, 255, 0.87);
        --border: rgba(255, 255, 255, 0.3);
        --page-bg: #151521;
    }
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Roboto', sans-serif;
    background: var(--page-bg);
    color: var(--text);
}

.login-card {
    background: var(--surface);
    border-radius: 8px;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
    padding: 2.5rem;
    width: 100%;
    max-width: 24rem;
}

.login-card h1 {
    margin: 0 0 1.5rem;
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
}

.login-card form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.login-card label {
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.login-card input:not([type="hidden"]) {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    padding: 0.75rem;
}

.login-card input:focus {
    border-color: var(--mud-primary);
    outline: 1px solid var(--mud-primary);
}

.login-card button {
    background: var(--mud-primary);
    border: none;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-top: 1rem;
    padding: 0.75rem;
    text-transform: uppercase;
}

.login-card button:hover {
    filter: brightness(1.1);
}

.login-error {
    color: #f44336;
    font-size: 0.8rem;
}

/* Used by the change-password page, which reuses this card. */
.login-success {
    color: #4caf50;
    font-size: 0.9rem;
    margin: 0 0 1rem;
}

.login-note {
    color: var(--text);
    opacity: 0.7;
    font-size: 0.8rem;
    line-height: 1.5;
    margin: 1rem 0 0;
}

.login-note code {
    font-family: ui-monospace, Consolas, monospace;
    font-size: 0.78rem;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    background: rgba(127, 127, 127, 0.18);
}

.login-card a {
    color: var(--mud-primary);
    font-size: 0.85rem;
    text-decoration: none;
    display: inline-block;
    margin-top: 1rem;
}

.login-card a:hover {
    text-decoration: underline;
}