.signup-widget {
        max-width: 520px;
        margin: 2rem auto;
        padding: 2rem;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius, 8px);
        box-shadow: var(--shadow-sm);
    }
    .signup-widget h3 {
        font-size: 1.25rem;
        font-weight: 600;
        letter-spacing: -0.01em;
        color: var(--color-text);
        margin-bottom: 0.5rem;
    }
    .signup-widget p {
        color: var(--color-text-dim);
        font-size: 0.92rem;
        margin-bottom: 1.25rem;
    }
    .signup-widget .signup-row {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
    }
    .signup-widget input[type="text"],
    .signup-widget input[type="email"] {
        width: 100%;
        padding: 0.7rem 0.9rem;
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius: 6px;
        color: var(--color-text);
        font-family: inherit;
        font-size: 0.92rem;
    }
    .signup-widget input::placeholder { color: var(--color-text-muted); }
    .signup-widget input:focus {
        outline: none;
        border-color: var(--color-primary-text);
        box-shadow: 0 0 0 3px var(--color-primary-dim);
    }
    .signup-widget button {
        padding: 0.7rem 1.25rem;
        background: var(--color-primary);
        color: #fff;
        border: 0;
        border-radius: 6px;
        font-family: inherit;
        font-weight: 500;
        font-size: 0.92rem;
        cursor: pointer;
    }
    .signup-widget button:hover { opacity: 0.9; }
    .signup-widget button:disabled { opacity: 0.6; cursor: default; }
    /* Honeypot — kept in the layout flow's reach for bots, invisible to humans. */
    .signup-widget .signup-hp {
        position: absolute;
        left: -9999px;
        width: 1px;
        height: 1px;
        overflow: hidden;
    }
    .signup-widget .signup-done {
        color: var(--color-success);
        font-weight: 500;
    }
    .signup-widget .signup-error {
        color: var(--color-danger);
        font-size: 0.85rem;
        margin-top: 0.5rem;
        min-height: 1rem;
    }